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bbf6f052 | 1 | /* Convert tree expression to rtl instructions, for GNU compiler. |
c85f7c16 | 2 | Copyright (C) 1988, 92-97, 1998 Free Software Foundation, Inc. |
bbf6f052 RK |
3 | |
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
940d9d63 RK |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
bbf6f052 RK |
20 | |
21 | ||
22 | #include "config.h" | |
670ee920 | 23 | #include "system.h" |
ca695ac9 | 24 | #include "machmode.h" |
bbf6f052 RK |
25 | #include "rtl.h" |
26 | #include "tree.h" | |
ca695ac9 | 27 | #include "obstack.h" |
bbf6f052 | 28 | #include "flags.h" |
bf76bb5a | 29 | #include "regs.h" |
4ed67205 | 30 | #include "hard-reg-set.h" |
3d195391 | 31 | #include "except.h" |
bbf6f052 RK |
32 | #include "function.h" |
33 | #include "insn-flags.h" | |
34 | #include "insn-codes.h" | |
bbf6f052 | 35 | #include "insn-config.h" |
d6f4ec51 KG |
36 | /* Include expr.h after insn-config.h so we get HAVE_conditional_move. */ |
37 | #include "expr.h" | |
bbf6f052 RK |
38 | #include "recog.h" |
39 | #include "output.h" | |
bbf6f052 | 40 | #include "typeclass.h" |
ca55abae | 41 | #include "defaults.h" |
10f0ad3d | 42 | #include "toplev.h" |
bbf6f052 RK |
43 | |
44 | #define CEIL(x,y) (((x) + (y) - 1) / (y)) | |
45 | ||
46 | /* Decide whether a function's arguments should be processed | |
bbc8a071 RK |
47 | from first to last or from last to first. |
48 | ||
49 | They should if the stack and args grow in opposite directions, but | |
50 | only if we have push insns. */ | |
bbf6f052 | 51 | |
bbf6f052 | 52 | #ifdef PUSH_ROUNDING |
bbc8a071 | 53 | |
3319a347 | 54 | #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD) |
bbf6f052 RK |
55 | #define PUSH_ARGS_REVERSED /* If it's last to first */ |
56 | #endif | |
bbc8a071 | 57 | |
bbf6f052 RK |
58 | #endif |
59 | ||
60 | #ifndef STACK_PUSH_CODE | |
61 | #ifdef STACK_GROWS_DOWNWARD | |
62 | #define STACK_PUSH_CODE PRE_DEC | |
63 | #else | |
64 | #define STACK_PUSH_CODE PRE_INC | |
65 | #endif | |
66 | #endif | |
67 | ||
68 | /* Like STACK_BOUNDARY but in units of bytes, not bits. */ | |
69 | #define STACK_BYTES (STACK_BOUNDARY / BITS_PER_UNIT) | |
70 | ||
18543a22 ILT |
71 | /* Assume that case vectors are not pc-relative. */ |
72 | #ifndef CASE_VECTOR_PC_RELATIVE | |
73 | #define CASE_VECTOR_PC_RELATIVE 0 | |
74 | #endif | |
75 | ||
bbf6f052 RK |
76 | /* If this is nonzero, we do not bother generating VOLATILE |
77 | around volatile memory references, and we are willing to | |
78 | output indirect addresses. If cse is to follow, we reject | |
79 | indirect addresses so a useful potential cse is generated; | |
80 | if it is used only once, instruction combination will produce | |
81 | the same indirect address eventually. */ | |
82 | int cse_not_expected; | |
83 | ||
84 | /* Nonzero to generate code for all the subroutines within an | |
85 | expression before generating the upper levels of the expression. | |
86 | Nowadays this is never zero. */ | |
87 | int do_preexpand_calls = 1; | |
88 | ||
89 | /* Number of units that we should eventually pop off the stack. | |
90 | These are the arguments to function calls that have already returned. */ | |
91 | int pending_stack_adjust; | |
92 | ||
93 | /* Nonzero means stack pops must not be deferred, and deferred stack | |
94 | pops must not be output. It is nonzero inside a function call, | |
95 | inside a conditional expression, inside a statement expression, | |
96 | and in other cases as well. */ | |
97 | int inhibit_defer_pop; | |
98 | ||
bbf6f052 RK |
99 | /* Nonzero means __builtin_saveregs has already been done in this function. |
100 | The value is the pseudoreg containing the value __builtin_saveregs | |
101 | returned. */ | |
102 | static rtx saveregs_value; | |
103 | ||
dcf76fff TW |
104 | /* Similarly for __builtin_apply_args. */ |
105 | static rtx apply_args_value; | |
106 | ||
956d6950 JL |
107 | /* Don't check memory usage, since code is being emitted to check a memory |
108 | usage. Used when flag_check_memory_usage is true, to avoid infinite | |
109 | recursion. */ | |
110 | static int in_check_memory_usage; | |
111 | ||
4969d05d RK |
112 | /* This structure is used by move_by_pieces to describe the move to |
113 | be performed. */ | |
4969d05d RK |
114 | struct move_by_pieces |
115 | { | |
116 | rtx to; | |
117 | rtx to_addr; | |
118 | int autinc_to; | |
119 | int explicit_inc_to; | |
e9cf6a97 | 120 | int to_struct; |
4969d05d RK |
121 | rtx from; |
122 | rtx from_addr; | |
123 | int autinc_from; | |
124 | int explicit_inc_from; | |
e9cf6a97 | 125 | int from_struct; |
4969d05d RK |
126 | int len; |
127 | int offset; | |
128 | int reverse; | |
129 | }; | |
130 | ||
9de08200 RK |
131 | /* This structure is used by clear_by_pieces to describe the clear to |
132 | be performed. */ | |
133 | ||
134 | struct clear_by_pieces | |
135 | { | |
136 | rtx to; | |
137 | rtx to_addr; | |
138 | int autinc_to; | |
139 | int explicit_inc_to; | |
140 | int to_struct; | |
141 | int len; | |
142 | int offset; | |
143 | int reverse; | |
144 | }; | |
145 | ||
292b1216 | 146 | extern struct obstack permanent_obstack; |
4ed67205 | 147 | extern rtx arg_pointer_save_area; |
c02bd5d9 | 148 | |
03566575 JW |
149 | static rtx get_push_address PROTO ((int)); |
150 | ||
4969d05d RK |
151 | static rtx enqueue_insn PROTO((rtx, rtx)); |
152 | static int queued_subexp_p PROTO((rtx)); | |
153 | static void init_queue PROTO((void)); | |
154 | static void move_by_pieces PROTO((rtx, rtx, int, int)); | |
155 | static int move_by_pieces_ninsns PROTO((unsigned int, int)); | |
eae4b970 | 156 | static void move_by_pieces_1 PROTO((rtx (*) (rtx, ...), enum machine_mode, |
4969d05d | 157 | struct move_by_pieces *)); |
9de08200 | 158 | static void clear_by_pieces PROTO((rtx, int, int)); |
eae4b970 | 159 | static void clear_by_pieces_1 PROTO((rtx (*) (rtx, ...), enum machine_mode, |
9de08200 RK |
160 | struct clear_by_pieces *)); |
161 | static int is_zeros_p PROTO((tree)); | |
162 | static int mostly_zeros_p PROTO((tree)); | |
d77fac3b JL |
163 | static void store_constructor_field PROTO((rtx, int, int, enum machine_mode, |
164 | tree, tree, int)); | |
e1a43f73 | 165 | static void store_constructor PROTO((tree, rtx, int)); |
4969d05d RK |
166 | static rtx store_field PROTO((rtx, int, int, enum machine_mode, tree, |
167 | enum machine_mode, int, int, int)); | |
e009aaf3 JL |
168 | static enum memory_use_mode |
169 | get_memory_usage_from_modifier PROTO((enum expand_modifier)); | |
4969d05d RK |
170 | static tree save_noncopied_parts PROTO((tree, tree)); |
171 | static tree init_noncopied_parts PROTO((tree, tree)); | |
e5e809f4 | 172 | static int safe_from_p PROTO((rtx, tree, int)); |
4969d05d | 173 | static int fixed_type_p PROTO((tree)); |
01c8a7c8 | 174 | static rtx var_rtx PROTO((tree)); |
4969d05d RK |
175 | static int get_pointer_alignment PROTO((tree, unsigned)); |
176 | static tree string_constant PROTO((tree, tree *)); | |
177 | static tree c_strlen PROTO((tree)); | |
307b821c RK |
178 | static rtx expand_builtin PROTO((tree, rtx, rtx, |
179 | enum machine_mode, int)); | |
0006469d TW |
180 | static int apply_args_size PROTO((void)); |
181 | static int apply_result_size PROTO((void)); | |
182 | static rtx result_vector PROTO((int, rtx)); | |
183 | static rtx expand_builtin_apply_args PROTO((void)); | |
184 | static rtx expand_builtin_apply PROTO((rtx, rtx, rtx)); | |
185 | static void expand_builtin_return PROTO((rtx)); | |
7b8b9722 | 186 | static rtx expand_increment PROTO((tree, int, int)); |
4969d05d RK |
187 | static void preexpand_calls PROTO((tree)); |
188 | static void do_jump_by_parts_greater PROTO((tree, int, rtx, rtx)); | |
2e5ec6cf | 189 | void do_jump_by_parts_greater_rtx PROTO((enum machine_mode, int, rtx, rtx, rtx, rtx)); |
4969d05d | 190 | static void do_jump_by_parts_equality PROTO((tree, rtx, rtx)); |
f5963e61 | 191 | void do_jump_by_parts_equality_rtx PROTO((rtx, rtx, rtx)); |
4969d05d RK |
192 | static void do_jump_for_compare PROTO((rtx, rtx, rtx)); |
193 | static rtx compare PROTO((tree, enum rtx_code, enum rtx_code)); | |
194 | static rtx do_store_flag PROTO((tree, rtx, enum machine_mode, int)); | |
16545b0a | 195 | extern tree truthvalue_conversion PROTO((tree)); |
bbf6f052 | 196 | |
4fa52007 RK |
197 | /* Record for each mode whether we can move a register directly to or |
198 | from an object of that mode in memory. If we can't, we won't try | |
199 | to use that mode directly when accessing a field of that mode. */ | |
200 | ||
201 | static char direct_load[NUM_MACHINE_MODES]; | |
202 | static char direct_store[NUM_MACHINE_MODES]; | |
203 | ||
bbf6f052 RK |
204 | /* MOVE_RATIO is the number of move instructions that is better than |
205 | a block move. */ | |
206 | ||
207 | #ifndef MOVE_RATIO | |
266007a7 | 208 | #if defined (HAVE_movstrqi) || defined (HAVE_movstrhi) || defined (HAVE_movstrsi) || defined (HAVE_movstrdi) || defined (HAVE_movstrti) |
bbf6f052 RK |
209 | #define MOVE_RATIO 2 |
210 | #else | |
996d9dac MM |
211 | /* If we are optimizing for space (-Os), cut down the default move ratio */ |
212 | #define MOVE_RATIO (optimize_size ? 3 : 15) | |
bbf6f052 RK |
213 | #endif |
214 | #endif | |
e87b4f3f | 215 | |
266007a7 | 216 | /* This array records the insn_code of insns to perform block moves. */ |
e6677db3 | 217 | enum insn_code movstr_optab[NUM_MACHINE_MODES]; |
266007a7 | 218 | |
9de08200 RK |
219 | /* This array records the insn_code of insns to perform block clears. */ |
220 | enum insn_code clrstr_optab[NUM_MACHINE_MODES]; | |
221 | ||
0f41302f | 222 | /* SLOW_UNALIGNED_ACCESS is non-zero if unaligned accesses are very slow. */ |
e87b4f3f RS |
223 | |
224 | #ifndef SLOW_UNALIGNED_ACCESS | |
c7a7ac46 | 225 | #define SLOW_UNALIGNED_ACCESS STRICT_ALIGNMENT |
e87b4f3f | 226 | #endif |
0006469d TW |
227 | |
228 | /* Register mappings for target machines without register windows. */ | |
229 | #ifndef INCOMING_REGNO | |
230 | #define INCOMING_REGNO(OUT) (OUT) | |
231 | #endif | |
232 | #ifndef OUTGOING_REGNO | |
233 | #define OUTGOING_REGNO(IN) (IN) | |
234 | #endif | |
bbf6f052 | 235 | \f |
4fa52007 | 236 | /* This is run once per compilation to set up which modes can be used |
266007a7 | 237 | directly in memory and to initialize the block move optab. */ |
4fa52007 RK |
238 | |
239 | void | |
240 | init_expr_once () | |
241 | { | |
242 | rtx insn, pat; | |
243 | enum machine_mode mode; | |
e2549997 RS |
244 | /* Try indexing by frame ptr and try by stack ptr. |
245 | It is known that on the Convex the stack ptr isn't a valid index. | |
246 | With luck, one or the other is valid on any machine. */ | |
38a448ca RH |
247 | rtx mem = gen_rtx_MEM (VOIDmode, stack_pointer_rtx); |
248 | rtx mem1 = gen_rtx_MEM (VOIDmode, frame_pointer_rtx); | |
4fa52007 RK |
249 | |
250 | start_sequence (); | |
38a448ca | 251 | insn = emit_insn (gen_rtx_SET (0, NULL_RTX, NULL_RTX)); |
4fa52007 RK |
252 | pat = PATTERN (insn); |
253 | ||
254 | for (mode = VOIDmode; (int) mode < NUM_MACHINE_MODES; | |
255 | mode = (enum machine_mode) ((int) mode + 1)) | |
256 | { | |
257 | int regno; | |
258 | rtx reg; | |
259 | int num_clobbers; | |
260 | ||
261 | direct_load[(int) mode] = direct_store[(int) mode] = 0; | |
262 | PUT_MODE (mem, mode); | |
e2549997 | 263 | PUT_MODE (mem1, mode); |
4fa52007 | 264 | |
e6fe56a4 RK |
265 | /* See if there is some register that can be used in this mode and |
266 | directly loaded or stored from memory. */ | |
267 | ||
7308a047 RS |
268 | if (mode != VOIDmode && mode != BLKmode) |
269 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER | |
270 | && (direct_load[(int) mode] == 0 || direct_store[(int) mode] == 0); | |
271 | regno++) | |
272 | { | |
273 | if (! HARD_REGNO_MODE_OK (regno, mode)) | |
274 | continue; | |
e6fe56a4 | 275 | |
38a448ca | 276 | reg = gen_rtx_REG (mode, regno); |
e6fe56a4 | 277 | |
7308a047 RS |
278 | SET_SRC (pat) = mem; |
279 | SET_DEST (pat) = reg; | |
280 | if (recog (pat, insn, &num_clobbers) >= 0) | |
281 | direct_load[(int) mode] = 1; | |
e6fe56a4 | 282 | |
e2549997 RS |
283 | SET_SRC (pat) = mem1; |
284 | SET_DEST (pat) = reg; | |
285 | if (recog (pat, insn, &num_clobbers) >= 0) | |
286 | direct_load[(int) mode] = 1; | |
287 | ||
7308a047 RS |
288 | SET_SRC (pat) = reg; |
289 | SET_DEST (pat) = mem; | |
290 | if (recog (pat, insn, &num_clobbers) >= 0) | |
291 | direct_store[(int) mode] = 1; | |
e2549997 RS |
292 | |
293 | SET_SRC (pat) = reg; | |
294 | SET_DEST (pat) = mem1; | |
295 | if (recog (pat, insn, &num_clobbers) >= 0) | |
296 | direct_store[(int) mode] = 1; | |
7308a047 | 297 | } |
4fa52007 RK |
298 | } |
299 | ||
300 | end_sequence (); | |
301 | } | |
302 | ||
bbf6f052 RK |
303 | /* This is run at the start of compiling a function. */ |
304 | ||
305 | void | |
306 | init_expr () | |
307 | { | |
308 | init_queue (); | |
309 | ||
310 | pending_stack_adjust = 0; | |
311 | inhibit_defer_pop = 0; | |
bbf6f052 | 312 | saveregs_value = 0; |
0006469d | 313 | apply_args_value = 0; |
e87b4f3f | 314 | forced_labels = 0; |
bbf6f052 RK |
315 | } |
316 | ||
317 | /* Save all variables describing the current status into the structure *P. | |
318 | This is used before starting a nested function. */ | |
319 | ||
320 | void | |
321 | save_expr_status (p) | |
322 | struct function *p; | |
323 | { | |
324 | /* Instead of saving the postincrement queue, empty it. */ | |
325 | emit_queue (); | |
326 | ||
327 | p->pending_stack_adjust = pending_stack_adjust; | |
328 | p->inhibit_defer_pop = inhibit_defer_pop; | |
bbf6f052 | 329 | p->saveregs_value = saveregs_value; |
0006469d | 330 | p->apply_args_value = apply_args_value; |
e87b4f3f | 331 | p->forced_labels = forced_labels; |
bbf6f052 RK |
332 | |
333 | pending_stack_adjust = 0; | |
334 | inhibit_defer_pop = 0; | |
bbf6f052 | 335 | saveregs_value = 0; |
0006469d | 336 | apply_args_value = 0; |
e87b4f3f | 337 | forced_labels = 0; |
bbf6f052 RK |
338 | } |
339 | ||
340 | /* Restore all variables describing the current status from the structure *P. | |
341 | This is used after a nested function. */ | |
342 | ||
343 | void | |
344 | restore_expr_status (p) | |
345 | struct function *p; | |
346 | { | |
347 | pending_stack_adjust = p->pending_stack_adjust; | |
348 | inhibit_defer_pop = p->inhibit_defer_pop; | |
bbf6f052 | 349 | saveregs_value = p->saveregs_value; |
0006469d | 350 | apply_args_value = p->apply_args_value; |
e87b4f3f | 351 | forced_labels = p->forced_labels; |
bbf6f052 RK |
352 | } |
353 | \f | |
354 | /* Manage the queue of increment instructions to be output | |
355 | for POSTINCREMENT_EXPR expressions, etc. */ | |
356 | ||
357 | static rtx pending_chain; | |
358 | ||
359 | /* Queue up to increment (or change) VAR later. BODY says how: | |
360 | BODY should be the same thing you would pass to emit_insn | |
361 | to increment right away. It will go to emit_insn later on. | |
362 | ||
363 | The value is a QUEUED expression to be used in place of VAR | |
364 | where you want to guarantee the pre-incrementation value of VAR. */ | |
365 | ||
366 | static rtx | |
367 | enqueue_insn (var, body) | |
368 | rtx var, body; | |
369 | { | |
38a448ca RH |
370 | pending_chain = gen_rtx_QUEUED (GET_MODE (var), |
371 | var, NULL_RTX, NULL_RTX, body, | |
372 | pending_chain); | |
bbf6f052 RK |
373 | return pending_chain; |
374 | } | |
375 | ||
376 | /* Use protect_from_queue to convert a QUEUED expression | |
377 | into something that you can put immediately into an instruction. | |
378 | If the queued incrementation has not happened yet, | |
379 | protect_from_queue returns the variable itself. | |
380 | If the incrementation has happened, protect_from_queue returns a temp | |
381 | that contains a copy of the old value of the variable. | |
382 | ||
383 | Any time an rtx which might possibly be a QUEUED is to be put | |
384 | into an instruction, it must be passed through protect_from_queue first. | |
385 | QUEUED expressions are not meaningful in instructions. | |
386 | ||
387 | Do not pass a value through protect_from_queue and then hold | |
388 | on to it for a while before putting it in an instruction! | |
389 | If the queue is flushed in between, incorrect code will result. */ | |
390 | ||
391 | rtx | |
392 | protect_from_queue (x, modify) | |
393 | register rtx x; | |
394 | int modify; | |
395 | { | |
396 | register RTX_CODE code = GET_CODE (x); | |
397 | ||
398 | #if 0 /* A QUEUED can hang around after the queue is forced out. */ | |
399 | /* Shortcut for most common case. */ | |
400 | if (pending_chain == 0) | |
401 | return x; | |
402 | #endif | |
403 | ||
404 | if (code != QUEUED) | |
405 | { | |
e9baa644 RK |
406 | /* A special hack for read access to (MEM (QUEUED ...)) to facilitate |
407 | use of autoincrement. Make a copy of the contents of the memory | |
408 | location rather than a copy of the address, but not if the value is | |
409 | of mode BLKmode. Don't modify X in place since it might be | |
410 | shared. */ | |
bbf6f052 RK |
411 | if (code == MEM && GET_MODE (x) != BLKmode |
412 | && GET_CODE (XEXP (x, 0)) == QUEUED && !modify) | |
413 | { | |
414 | register rtx y = XEXP (x, 0); | |
38a448ca | 415 | register rtx new = gen_rtx_MEM (GET_MODE (x), QUEUED_VAR (y)); |
e9baa644 RK |
416 | |
417 | MEM_IN_STRUCT_P (new) = MEM_IN_STRUCT_P (x); | |
418 | RTX_UNCHANGING_P (new) = RTX_UNCHANGING_P (x); | |
419 | MEM_VOLATILE_P (new) = MEM_VOLATILE_P (x); | |
420 | ||
bbf6f052 RK |
421 | if (QUEUED_INSN (y)) |
422 | { | |
e9baa644 RK |
423 | register rtx temp = gen_reg_rtx (GET_MODE (new)); |
424 | emit_insn_before (gen_move_insn (temp, new), | |
bbf6f052 RK |
425 | QUEUED_INSN (y)); |
426 | return temp; | |
427 | } | |
e9baa644 | 428 | return new; |
bbf6f052 RK |
429 | } |
430 | /* Otherwise, recursively protect the subexpressions of all | |
431 | the kinds of rtx's that can contain a QUEUED. */ | |
432 | if (code == MEM) | |
3f15938e RS |
433 | { |
434 | rtx tem = protect_from_queue (XEXP (x, 0), 0); | |
435 | if (tem != XEXP (x, 0)) | |
436 | { | |
437 | x = copy_rtx (x); | |
438 | XEXP (x, 0) = tem; | |
439 | } | |
440 | } | |
bbf6f052 RK |
441 | else if (code == PLUS || code == MULT) |
442 | { | |
3f15938e RS |
443 | rtx new0 = protect_from_queue (XEXP (x, 0), 0); |
444 | rtx new1 = protect_from_queue (XEXP (x, 1), 0); | |
445 | if (new0 != XEXP (x, 0) || new1 != XEXP (x, 1)) | |
446 | { | |
447 | x = copy_rtx (x); | |
448 | XEXP (x, 0) = new0; | |
449 | XEXP (x, 1) = new1; | |
450 | } | |
bbf6f052 RK |
451 | } |
452 | return x; | |
453 | } | |
454 | /* If the increment has not happened, use the variable itself. */ | |
455 | if (QUEUED_INSN (x) == 0) | |
456 | return QUEUED_VAR (x); | |
457 | /* If the increment has happened and a pre-increment copy exists, | |
458 | use that copy. */ | |
459 | if (QUEUED_COPY (x) != 0) | |
460 | return QUEUED_COPY (x); | |
461 | /* The increment has happened but we haven't set up a pre-increment copy. | |
462 | Set one up now, and use it. */ | |
463 | QUEUED_COPY (x) = gen_reg_rtx (GET_MODE (QUEUED_VAR (x))); | |
464 | emit_insn_before (gen_move_insn (QUEUED_COPY (x), QUEUED_VAR (x)), | |
465 | QUEUED_INSN (x)); | |
466 | return QUEUED_COPY (x); | |
467 | } | |
468 | ||
469 | /* Return nonzero if X contains a QUEUED expression: | |
470 | if it contains anything that will be altered by a queued increment. | |
471 | We handle only combinations of MEM, PLUS, MINUS and MULT operators | |
472 | since memory addresses generally contain only those. */ | |
473 | ||
474 | static int | |
475 | queued_subexp_p (x) | |
476 | rtx x; | |
477 | { | |
478 | register enum rtx_code code = GET_CODE (x); | |
479 | switch (code) | |
480 | { | |
481 | case QUEUED: | |
482 | return 1; | |
483 | case MEM: | |
484 | return queued_subexp_p (XEXP (x, 0)); | |
485 | case MULT: | |
486 | case PLUS: | |
487 | case MINUS: | |
e9a25f70 JL |
488 | return (queued_subexp_p (XEXP (x, 0)) |
489 | || queued_subexp_p (XEXP (x, 1))); | |
490 | default: | |
491 | return 0; | |
bbf6f052 | 492 | } |
bbf6f052 RK |
493 | } |
494 | ||
495 | /* Perform all the pending incrementations. */ | |
496 | ||
497 | void | |
498 | emit_queue () | |
499 | { | |
500 | register rtx p; | |
381127e8 | 501 | while ((p = pending_chain)) |
bbf6f052 RK |
502 | { |
503 | QUEUED_INSN (p) = emit_insn (QUEUED_BODY (p)); | |
504 | pending_chain = QUEUED_NEXT (p); | |
505 | } | |
506 | } | |
507 | ||
508 | static void | |
509 | init_queue () | |
510 | { | |
511 | if (pending_chain) | |
512 | abort (); | |
513 | } | |
514 | \f | |
515 | /* Copy data from FROM to TO, where the machine modes are not the same. | |
516 | Both modes may be integer, or both may be floating. | |
517 | UNSIGNEDP should be nonzero if FROM is an unsigned type. | |
518 | This causes zero-extension instead of sign-extension. */ | |
519 | ||
520 | void | |
521 | convert_move (to, from, unsignedp) | |
522 | register rtx to, from; | |
523 | int unsignedp; | |
524 | { | |
525 | enum machine_mode to_mode = GET_MODE (to); | |
526 | enum machine_mode from_mode = GET_MODE (from); | |
527 | int to_real = GET_MODE_CLASS (to_mode) == MODE_FLOAT; | |
528 | int from_real = GET_MODE_CLASS (from_mode) == MODE_FLOAT; | |
529 | enum insn_code code; | |
530 | rtx libcall; | |
531 | ||
532 | /* rtx code for making an equivalent value. */ | |
533 | enum rtx_code equiv_code = (unsignedp ? ZERO_EXTEND : SIGN_EXTEND); | |
534 | ||
535 | to = protect_from_queue (to, 1); | |
536 | from = protect_from_queue (from, 0); | |
537 | ||
538 | if (to_real != from_real) | |
539 | abort (); | |
540 | ||
1499e0a8 RK |
541 | /* If FROM is a SUBREG that indicates that we have already done at least |
542 | the required extension, strip it. We don't handle such SUBREGs as | |
543 | TO here. */ | |
544 | ||
545 | if (GET_CODE (from) == SUBREG && SUBREG_PROMOTED_VAR_P (from) | |
546 | && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (from))) | |
547 | >= GET_MODE_SIZE (to_mode)) | |
548 | && SUBREG_PROMOTED_UNSIGNED_P (from) == unsignedp) | |
549 | from = gen_lowpart (to_mode, from), from_mode = to_mode; | |
550 | ||
551 | if (GET_CODE (to) == SUBREG && SUBREG_PROMOTED_VAR_P (to)) | |
552 | abort (); | |
553 | ||
bbf6f052 RK |
554 | if (to_mode == from_mode |
555 | || (from_mode == VOIDmode && CONSTANT_P (from))) | |
556 | { | |
557 | emit_move_insn (to, from); | |
558 | return; | |
559 | } | |
560 | ||
561 | if (to_real) | |
562 | { | |
81d79e2c RS |
563 | rtx value; |
564 | ||
2b01c326 | 565 | if (GET_MODE_BITSIZE (from_mode) < GET_MODE_BITSIZE (to_mode)) |
b424402e | 566 | { |
2b01c326 RK |
567 | /* Try converting directly if the insn is supported. */ |
568 | if ((code = can_extend_p (to_mode, from_mode, 0)) | |
569 | != CODE_FOR_nothing) | |
570 | { | |
571 | emit_unop_insn (code, to, from, UNKNOWN); | |
572 | return; | |
573 | } | |
bbf6f052 | 574 | } |
2b01c326 | 575 | |
b424402e RS |
576 | #ifdef HAVE_trunchfqf2 |
577 | if (HAVE_trunchfqf2 && from_mode == HFmode && to_mode == QFmode) | |
578 | { | |
579 | emit_unop_insn (CODE_FOR_trunchfqf2, to, from, UNKNOWN); | |
580 | return; | |
581 | } | |
582 | #endif | |
704af6a1 JL |
583 | #ifdef HAVE_trunctqfqf2 |
584 | if (HAVE_trunctqfqf2 && from_mode == TQFmode && to_mode == QFmode) | |
585 | { | |
586 | emit_unop_insn (CODE_FOR_trunctqfqf2, to, from, UNKNOWN); | |
587 | return; | |
588 | } | |
589 | #endif | |
b424402e RS |
590 | #ifdef HAVE_truncsfqf2 |
591 | if (HAVE_truncsfqf2 && from_mode == SFmode && to_mode == QFmode) | |
592 | { | |
593 | emit_unop_insn (CODE_FOR_truncsfqf2, to, from, UNKNOWN); | |
594 | return; | |
595 | } | |
596 | #endif | |
597 | #ifdef HAVE_truncdfqf2 | |
598 | if (HAVE_truncdfqf2 && from_mode == DFmode && to_mode == QFmode) | |
599 | { | |
600 | emit_unop_insn (CODE_FOR_truncdfqf2, to, from, UNKNOWN); | |
601 | return; | |
602 | } | |
603 | #endif | |
604 | #ifdef HAVE_truncxfqf2 | |
605 | if (HAVE_truncxfqf2 && from_mode == XFmode && to_mode == QFmode) | |
606 | { | |
607 | emit_unop_insn (CODE_FOR_truncxfqf2, to, from, UNKNOWN); | |
608 | return; | |
609 | } | |
610 | #endif | |
611 | #ifdef HAVE_trunctfqf2 | |
612 | if (HAVE_trunctfqf2 && from_mode == TFmode && to_mode == QFmode) | |
613 | { | |
614 | emit_unop_insn (CODE_FOR_trunctfqf2, to, from, UNKNOWN); | |
615 | return; | |
616 | } | |
617 | #endif | |
03747aa3 RK |
618 | |
619 | #ifdef HAVE_trunctqfhf2 | |
620 | if (HAVE_trunctqfhf2 && from_mode == TQFmode && to_mode == HFmode) | |
621 | { | |
622 | emit_unop_insn (CODE_FOR_trunctqfhf2, to, from, UNKNOWN); | |
623 | return; | |
624 | } | |
625 | #endif | |
b424402e RS |
626 | #ifdef HAVE_truncsfhf2 |
627 | if (HAVE_truncsfhf2 && from_mode == SFmode && to_mode == HFmode) | |
628 | { | |
629 | emit_unop_insn (CODE_FOR_truncsfhf2, to, from, UNKNOWN); | |
630 | return; | |
631 | } | |
632 | #endif | |
633 | #ifdef HAVE_truncdfhf2 | |
634 | if (HAVE_truncdfhf2 && from_mode == DFmode && to_mode == HFmode) | |
635 | { | |
636 | emit_unop_insn (CODE_FOR_truncdfhf2, to, from, UNKNOWN); | |
637 | return; | |
638 | } | |
639 | #endif | |
640 | #ifdef HAVE_truncxfhf2 | |
641 | if (HAVE_truncxfhf2 && from_mode == XFmode && to_mode == HFmode) | |
642 | { | |
643 | emit_unop_insn (CODE_FOR_truncxfhf2, to, from, UNKNOWN); | |
644 | return; | |
645 | } | |
646 | #endif | |
647 | #ifdef HAVE_trunctfhf2 | |
648 | if (HAVE_trunctfhf2 && from_mode == TFmode && to_mode == HFmode) | |
649 | { | |
650 | emit_unop_insn (CODE_FOR_trunctfhf2, to, from, UNKNOWN); | |
651 | return; | |
652 | } | |
653 | #endif | |
2b01c326 RK |
654 | |
655 | #ifdef HAVE_truncsftqf2 | |
656 | if (HAVE_truncsftqf2 && from_mode == SFmode && to_mode == TQFmode) | |
657 | { | |
658 | emit_unop_insn (CODE_FOR_truncsftqf2, to, from, UNKNOWN); | |
659 | return; | |
660 | } | |
661 | #endif | |
662 | #ifdef HAVE_truncdftqf2 | |
663 | if (HAVE_truncdftqf2 && from_mode == DFmode && to_mode == TQFmode) | |
664 | { | |
665 | emit_unop_insn (CODE_FOR_truncdftqf2, to, from, UNKNOWN); | |
666 | return; | |
667 | } | |
668 | #endif | |
669 | #ifdef HAVE_truncxftqf2 | |
670 | if (HAVE_truncxftqf2 && from_mode == XFmode && to_mode == TQFmode) | |
671 | { | |
672 | emit_unop_insn (CODE_FOR_truncxftqf2, to, from, UNKNOWN); | |
673 | return; | |
674 | } | |
675 | #endif | |
676 | #ifdef HAVE_trunctftqf2 | |
677 | if (HAVE_trunctftqf2 && from_mode == TFmode && to_mode == TQFmode) | |
678 | { | |
679 | emit_unop_insn (CODE_FOR_trunctftqf2, to, from, UNKNOWN); | |
680 | return; | |
681 | } | |
682 | #endif | |
683 | ||
bbf6f052 RK |
684 | #ifdef HAVE_truncdfsf2 |
685 | if (HAVE_truncdfsf2 && from_mode == DFmode && to_mode == SFmode) | |
686 | { | |
687 | emit_unop_insn (CODE_FOR_truncdfsf2, to, from, UNKNOWN); | |
688 | return; | |
689 | } | |
690 | #endif | |
b092b471 JW |
691 | #ifdef HAVE_truncxfsf2 |
692 | if (HAVE_truncxfsf2 && from_mode == XFmode && to_mode == SFmode) | |
693 | { | |
694 | emit_unop_insn (CODE_FOR_truncxfsf2, to, from, UNKNOWN); | |
695 | return; | |
696 | } | |
697 | #endif | |
bbf6f052 RK |
698 | #ifdef HAVE_trunctfsf2 |
699 | if (HAVE_trunctfsf2 && from_mode == TFmode && to_mode == SFmode) | |
700 | { | |
701 | emit_unop_insn (CODE_FOR_trunctfsf2, to, from, UNKNOWN); | |
702 | return; | |
703 | } | |
704 | #endif | |
b092b471 JW |
705 | #ifdef HAVE_truncxfdf2 |
706 | if (HAVE_truncxfdf2 && from_mode == XFmode && to_mode == DFmode) | |
707 | { | |
708 | emit_unop_insn (CODE_FOR_truncxfdf2, to, from, UNKNOWN); | |
709 | return; | |
710 | } | |
711 | #endif | |
bbf6f052 RK |
712 | #ifdef HAVE_trunctfdf2 |
713 | if (HAVE_trunctfdf2 && from_mode == TFmode && to_mode == DFmode) | |
714 | { | |
715 | emit_unop_insn (CODE_FOR_trunctfdf2, to, from, UNKNOWN); | |
716 | return; | |
717 | } | |
718 | #endif | |
719 | ||
b092b471 JW |
720 | libcall = (rtx) 0; |
721 | switch (from_mode) | |
722 | { | |
723 | case SFmode: | |
724 | switch (to_mode) | |
725 | { | |
726 | case DFmode: | |
727 | libcall = extendsfdf2_libfunc; | |
728 | break; | |
729 | ||
730 | case XFmode: | |
731 | libcall = extendsfxf2_libfunc; | |
732 | break; | |
733 | ||
734 | case TFmode: | |
735 | libcall = extendsftf2_libfunc; | |
736 | break; | |
e9a25f70 JL |
737 | |
738 | default: | |
739 | break; | |
b092b471 JW |
740 | } |
741 | break; | |
742 | ||
743 | case DFmode: | |
744 | switch (to_mode) | |
745 | { | |
746 | case SFmode: | |
747 | libcall = truncdfsf2_libfunc; | |
748 | break; | |
749 | ||
750 | case XFmode: | |
751 | libcall = extenddfxf2_libfunc; | |
752 | break; | |
753 | ||
754 | case TFmode: | |
755 | libcall = extenddftf2_libfunc; | |
756 | break; | |
e9a25f70 JL |
757 | |
758 | default: | |
759 | break; | |
b092b471 JW |
760 | } |
761 | break; | |
762 | ||
763 | case XFmode: | |
764 | switch (to_mode) | |
765 | { | |
766 | case SFmode: | |
767 | libcall = truncxfsf2_libfunc; | |
768 | break; | |
769 | ||
770 | case DFmode: | |
771 | libcall = truncxfdf2_libfunc; | |
772 | break; | |
e9a25f70 JL |
773 | |
774 | default: | |
775 | break; | |
b092b471 JW |
776 | } |
777 | break; | |
778 | ||
779 | case TFmode: | |
780 | switch (to_mode) | |
781 | { | |
782 | case SFmode: | |
783 | libcall = trunctfsf2_libfunc; | |
784 | break; | |
785 | ||
786 | case DFmode: | |
787 | libcall = trunctfdf2_libfunc; | |
788 | break; | |
e9a25f70 JL |
789 | |
790 | default: | |
791 | break; | |
b092b471 JW |
792 | } |
793 | break; | |
e9a25f70 JL |
794 | |
795 | default: | |
796 | break; | |
b092b471 JW |
797 | } |
798 | ||
799 | if (libcall == (rtx) 0) | |
800 | /* This conversion is not implemented yet. */ | |
bbf6f052 RK |
801 | abort (); |
802 | ||
81d79e2c RS |
803 | value = emit_library_call_value (libcall, NULL_RTX, 1, to_mode, |
804 | 1, from, from_mode); | |
805 | emit_move_insn (to, value); | |
bbf6f052 RK |
806 | return; |
807 | } | |
808 | ||
809 | /* Now both modes are integers. */ | |
810 | ||
811 | /* Handle expanding beyond a word. */ | |
812 | if (GET_MODE_BITSIZE (from_mode) < GET_MODE_BITSIZE (to_mode) | |
813 | && GET_MODE_BITSIZE (to_mode) > BITS_PER_WORD) | |
814 | { | |
815 | rtx insns; | |
816 | rtx lowpart; | |
817 | rtx fill_value; | |
818 | rtx lowfrom; | |
819 | int i; | |
820 | enum machine_mode lowpart_mode; | |
821 | int nwords = CEIL (GET_MODE_SIZE (to_mode), UNITS_PER_WORD); | |
822 | ||
823 | /* Try converting directly if the insn is supported. */ | |
824 | if ((code = can_extend_p (to_mode, from_mode, unsignedp)) | |
825 | != CODE_FOR_nothing) | |
826 | { | |
cd1b4b44 RK |
827 | /* If FROM is a SUBREG, put it into a register. Do this |
828 | so that we always generate the same set of insns for | |
829 | better cse'ing; if an intermediate assignment occurred, | |
830 | we won't be doing the operation directly on the SUBREG. */ | |
831 | if (optimize > 0 && GET_CODE (from) == SUBREG) | |
832 | from = force_reg (from_mode, from); | |
bbf6f052 RK |
833 | emit_unop_insn (code, to, from, equiv_code); |
834 | return; | |
835 | } | |
836 | /* Next, try converting via full word. */ | |
837 | else if (GET_MODE_BITSIZE (from_mode) < BITS_PER_WORD | |
838 | && ((code = can_extend_p (to_mode, word_mode, unsignedp)) | |
839 | != CODE_FOR_nothing)) | |
840 | { | |
a81fee56 | 841 | if (GET_CODE (to) == REG) |
38a448ca | 842 | emit_insn (gen_rtx_CLOBBER (VOIDmode, to)); |
bbf6f052 RK |
843 | convert_move (gen_lowpart (word_mode, to), from, unsignedp); |
844 | emit_unop_insn (code, to, | |
845 | gen_lowpart (word_mode, to), equiv_code); | |
846 | return; | |
847 | } | |
848 | ||
849 | /* No special multiword conversion insn; do it by hand. */ | |
850 | start_sequence (); | |
851 | ||
5c5033c3 RK |
852 | /* Since we will turn this into a no conflict block, we must ensure |
853 | that the source does not overlap the target. */ | |
854 | ||
855 | if (reg_overlap_mentioned_p (to, from)) | |
856 | from = force_reg (from_mode, from); | |
857 | ||
bbf6f052 RK |
858 | /* Get a copy of FROM widened to a word, if necessary. */ |
859 | if (GET_MODE_BITSIZE (from_mode) < BITS_PER_WORD) | |
860 | lowpart_mode = word_mode; | |
861 | else | |
862 | lowpart_mode = from_mode; | |
863 | ||
864 | lowfrom = convert_to_mode (lowpart_mode, from, unsignedp); | |
865 | ||
866 | lowpart = gen_lowpart (lowpart_mode, to); | |
867 | emit_move_insn (lowpart, lowfrom); | |
868 | ||
869 | /* Compute the value to put in each remaining word. */ | |
870 | if (unsignedp) | |
871 | fill_value = const0_rtx; | |
872 | else | |
873 | { | |
874 | #ifdef HAVE_slt | |
875 | if (HAVE_slt | |
876 | && insn_operand_mode[(int) CODE_FOR_slt][0] == word_mode | |
877 | && STORE_FLAG_VALUE == -1) | |
878 | { | |
906c4e36 RK |
879 | emit_cmp_insn (lowfrom, const0_rtx, NE, NULL_RTX, |
880 | lowpart_mode, 0, 0); | |
bbf6f052 RK |
881 | fill_value = gen_reg_rtx (word_mode); |
882 | emit_insn (gen_slt (fill_value)); | |
883 | } | |
884 | else | |
885 | #endif | |
886 | { | |
887 | fill_value | |
888 | = expand_shift (RSHIFT_EXPR, lowpart_mode, lowfrom, | |
889 | size_int (GET_MODE_BITSIZE (lowpart_mode) - 1), | |
906c4e36 | 890 | NULL_RTX, 0); |
bbf6f052 RK |
891 | fill_value = convert_to_mode (word_mode, fill_value, 1); |
892 | } | |
893 | } | |
894 | ||
895 | /* Fill the remaining words. */ | |
896 | for (i = GET_MODE_SIZE (lowpart_mode) / UNITS_PER_WORD; i < nwords; i++) | |
897 | { | |
898 | int index = (WORDS_BIG_ENDIAN ? nwords - i - 1 : i); | |
899 | rtx subword = operand_subword (to, index, 1, to_mode); | |
900 | ||
901 | if (subword == 0) | |
902 | abort (); | |
903 | ||
904 | if (fill_value != subword) | |
905 | emit_move_insn (subword, fill_value); | |
906 | } | |
907 | ||
908 | insns = get_insns (); | |
909 | end_sequence (); | |
910 | ||
906c4e36 | 911 | emit_no_conflict_block (insns, to, from, NULL_RTX, |
38a448ca | 912 | gen_rtx_fmt_e (equiv_code, to_mode, copy_rtx (from))); |
bbf6f052 RK |
913 | return; |
914 | } | |
915 | ||
d3c64ee3 RS |
916 | /* Truncating multi-word to a word or less. */ |
917 | if (GET_MODE_BITSIZE (from_mode) > BITS_PER_WORD | |
918 | && GET_MODE_BITSIZE (to_mode) <= BITS_PER_WORD) | |
bbf6f052 | 919 | { |
431a6eca JW |
920 | if (!((GET_CODE (from) == MEM |
921 | && ! MEM_VOLATILE_P (from) | |
922 | && direct_load[(int) to_mode] | |
923 | && ! mode_dependent_address_p (XEXP (from, 0))) | |
924 | || GET_CODE (from) == REG | |
925 | || GET_CODE (from) == SUBREG)) | |
926 | from = force_reg (from_mode, from); | |
bbf6f052 RK |
927 | convert_move (to, gen_lowpart (word_mode, from), 0); |
928 | return; | |
929 | } | |
930 | ||
931 | /* Handle pointer conversion */ /* SPEE 900220 */ | |
e5e809f4 JL |
932 | if (to_mode == PQImode) |
933 | { | |
934 | if (from_mode != QImode) | |
935 | from = convert_to_mode (QImode, from, unsignedp); | |
936 | ||
937 | #ifdef HAVE_truncqipqi2 | |
938 | if (HAVE_truncqipqi2) | |
939 | { | |
940 | emit_unop_insn (CODE_FOR_truncqipqi2, to, from, UNKNOWN); | |
941 | return; | |
942 | } | |
943 | #endif /* HAVE_truncqipqi2 */ | |
944 | abort (); | |
945 | } | |
946 | ||
947 | if (from_mode == PQImode) | |
948 | { | |
949 | if (to_mode != QImode) | |
950 | { | |
951 | from = convert_to_mode (QImode, from, unsignedp); | |
952 | from_mode = QImode; | |
953 | } | |
954 | else | |
955 | { | |
956 | #ifdef HAVE_extendpqiqi2 | |
957 | if (HAVE_extendpqiqi2) | |
958 | { | |
959 | emit_unop_insn (CODE_FOR_extendpqiqi2, to, from, UNKNOWN); | |
960 | return; | |
961 | } | |
962 | #endif /* HAVE_extendpqiqi2 */ | |
963 | abort (); | |
964 | } | |
965 | } | |
966 | ||
bbf6f052 RK |
967 | if (to_mode == PSImode) |
968 | { | |
969 | if (from_mode != SImode) | |
970 | from = convert_to_mode (SImode, from, unsignedp); | |
971 | ||
1f584163 DE |
972 | #ifdef HAVE_truncsipsi2 |
973 | if (HAVE_truncsipsi2) | |
bbf6f052 | 974 | { |
1f584163 | 975 | emit_unop_insn (CODE_FOR_truncsipsi2, to, from, UNKNOWN); |
bbf6f052 RK |
976 | return; |
977 | } | |
1f584163 | 978 | #endif /* HAVE_truncsipsi2 */ |
bbf6f052 RK |
979 | abort (); |
980 | } | |
981 | ||
982 | if (from_mode == PSImode) | |
983 | { | |
984 | if (to_mode != SImode) | |
985 | { | |
986 | from = convert_to_mode (SImode, from, unsignedp); | |
987 | from_mode = SImode; | |
988 | } | |
989 | else | |
990 | { | |
1f584163 DE |
991 | #ifdef HAVE_extendpsisi2 |
992 | if (HAVE_extendpsisi2) | |
bbf6f052 | 993 | { |
1f584163 | 994 | emit_unop_insn (CODE_FOR_extendpsisi2, to, from, UNKNOWN); |
bbf6f052 RK |
995 | return; |
996 | } | |
1f584163 | 997 | #endif /* HAVE_extendpsisi2 */ |
bbf6f052 RK |
998 | abort (); |
999 | } | |
1000 | } | |
1001 | ||
0407367d RK |
1002 | if (to_mode == PDImode) |
1003 | { | |
1004 | if (from_mode != DImode) | |
1005 | from = convert_to_mode (DImode, from, unsignedp); | |
1006 | ||
1007 | #ifdef HAVE_truncdipdi2 | |
1008 | if (HAVE_truncdipdi2) | |
1009 | { | |
1010 | emit_unop_insn (CODE_FOR_truncdipdi2, to, from, UNKNOWN); | |
1011 | return; | |
1012 | } | |
1013 | #endif /* HAVE_truncdipdi2 */ | |
1014 | abort (); | |
1015 | } | |
1016 | ||
1017 | if (from_mode == PDImode) | |
1018 | { | |
1019 | if (to_mode != DImode) | |
1020 | { | |
1021 | from = convert_to_mode (DImode, from, unsignedp); | |
1022 | from_mode = DImode; | |
1023 | } | |
1024 | else | |
1025 | { | |
1026 | #ifdef HAVE_extendpdidi2 | |
1027 | if (HAVE_extendpdidi2) | |
1028 | { | |
1029 | emit_unop_insn (CODE_FOR_extendpdidi2, to, from, UNKNOWN); | |
1030 | return; | |
1031 | } | |
1032 | #endif /* HAVE_extendpdidi2 */ | |
1033 | abort (); | |
1034 | } | |
1035 | } | |
1036 | ||
bbf6f052 RK |
1037 | /* Now follow all the conversions between integers |
1038 | no more than a word long. */ | |
1039 | ||
1040 | /* For truncation, usually we can just refer to FROM in a narrower mode. */ | |
1041 | if (GET_MODE_BITSIZE (to_mode) < GET_MODE_BITSIZE (from_mode) | |
1042 | && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (to_mode), | |
d3c64ee3 | 1043 | GET_MODE_BITSIZE (from_mode))) |
bbf6f052 | 1044 | { |
d3c64ee3 RS |
1045 | if (!((GET_CODE (from) == MEM |
1046 | && ! MEM_VOLATILE_P (from) | |
1047 | && direct_load[(int) to_mode] | |
1048 | && ! mode_dependent_address_p (XEXP (from, 0))) | |
1049 | || GET_CODE (from) == REG | |
1050 | || GET_CODE (from) == SUBREG)) | |
1051 | from = force_reg (from_mode, from); | |
34aa3599 RK |
1052 | if (GET_CODE (from) == REG && REGNO (from) < FIRST_PSEUDO_REGISTER |
1053 | && ! HARD_REGNO_MODE_OK (REGNO (from), to_mode)) | |
1054 | from = copy_to_reg (from); | |
bbf6f052 RK |
1055 | emit_move_insn (to, gen_lowpart (to_mode, from)); |
1056 | return; | |
1057 | } | |
1058 | ||
d3c64ee3 | 1059 | /* Handle extension. */ |
bbf6f052 RK |
1060 | if (GET_MODE_BITSIZE (to_mode) > GET_MODE_BITSIZE (from_mode)) |
1061 | { | |
1062 | /* Convert directly if that works. */ | |
1063 | if ((code = can_extend_p (to_mode, from_mode, unsignedp)) | |
1064 | != CODE_FOR_nothing) | |
1065 | { | |
1066 | emit_unop_insn (code, to, from, equiv_code); | |
1067 | return; | |
1068 | } | |
1069 | else | |
1070 | { | |
1071 | enum machine_mode intermediate; | |
1072 | ||
1073 | /* Search for a mode to convert via. */ | |
1074 | for (intermediate = from_mode; intermediate != VOIDmode; | |
1075 | intermediate = GET_MODE_WIDER_MODE (intermediate)) | |
930b4e39 RK |
1076 | if (((can_extend_p (to_mode, intermediate, unsignedp) |
1077 | != CODE_FOR_nothing) | |
1078 | || (GET_MODE_SIZE (to_mode) < GET_MODE_SIZE (intermediate) | |
1079 | && TRULY_NOOP_TRUNCATION (to_mode, intermediate))) | |
bbf6f052 RK |
1080 | && (can_extend_p (intermediate, from_mode, unsignedp) |
1081 | != CODE_FOR_nothing)) | |
1082 | { | |
1083 | convert_move (to, convert_to_mode (intermediate, from, | |
1084 | unsignedp), unsignedp); | |
1085 | return; | |
1086 | } | |
1087 | ||
1088 | /* No suitable intermediate mode. */ | |
1089 | abort (); | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | /* Support special truncate insns for certain modes. */ | |
1094 | ||
1095 | if (from_mode == DImode && to_mode == SImode) | |
1096 | { | |
1097 | #ifdef HAVE_truncdisi2 | |
1098 | if (HAVE_truncdisi2) | |
1099 | { | |
1100 | emit_unop_insn (CODE_FOR_truncdisi2, to, from, UNKNOWN); | |
1101 | return; | |
1102 | } | |
1103 | #endif | |
1104 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1105 | return; | |
1106 | } | |
1107 | ||
1108 | if (from_mode == DImode && to_mode == HImode) | |
1109 | { | |
1110 | #ifdef HAVE_truncdihi2 | |
1111 | if (HAVE_truncdihi2) | |
1112 | { | |
1113 | emit_unop_insn (CODE_FOR_truncdihi2, to, from, UNKNOWN); | |
1114 | return; | |
1115 | } | |
1116 | #endif | |
1117 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1118 | return; | |
1119 | } | |
1120 | ||
1121 | if (from_mode == DImode && to_mode == QImode) | |
1122 | { | |
1123 | #ifdef HAVE_truncdiqi2 | |
1124 | if (HAVE_truncdiqi2) | |
1125 | { | |
1126 | emit_unop_insn (CODE_FOR_truncdiqi2, to, from, UNKNOWN); | |
1127 | return; | |
1128 | } | |
1129 | #endif | |
1130 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1131 | return; | |
1132 | } | |
1133 | ||
1134 | if (from_mode == SImode && to_mode == HImode) | |
1135 | { | |
1136 | #ifdef HAVE_truncsihi2 | |
1137 | if (HAVE_truncsihi2) | |
1138 | { | |
1139 | emit_unop_insn (CODE_FOR_truncsihi2, to, from, UNKNOWN); | |
1140 | return; | |
1141 | } | |
1142 | #endif | |
1143 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | if (from_mode == SImode && to_mode == QImode) | |
1148 | { | |
1149 | #ifdef HAVE_truncsiqi2 | |
1150 | if (HAVE_truncsiqi2) | |
1151 | { | |
1152 | emit_unop_insn (CODE_FOR_truncsiqi2, to, from, UNKNOWN); | |
1153 | return; | |
1154 | } | |
1155 | #endif | |
1156 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | if (from_mode == HImode && to_mode == QImode) | |
1161 | { | |
1162 | #ifdef HAVE_trunchiqi2 | |
1163 | if (HAVE_trunchiqi2) | |
1164 | { | |
1165 | emit_unop_insn (CODE_FOR_trunchiqi2, to, from, UNKNOWN); | |
1166 | return; | |
1167 | } | |
1168 | #endif | |
1169 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1170 | return; | |
1171 | } | |
1172 | ||
b9bcad65 RK |
1173 | if (from_mode == TImode && to_mode == DImode) |
1174 | { | |
1175 | #ifdef HAVE_trunctidi2 | |
1176 | if (HAVE_trunctidi2) | |
1177 | { | |
1178 | emit_unop_insn (CODE_FOR_trunctidi2, to, from, UNKNOWN); | |
1179 | return; | |
1180 | } | |
1181 | #endif | |
1182 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1183 | return; | |
1184 | } | |
1185 | ||
1186 | if (from_mode == TImode && to_mode == SImode) | |
1187 | { | |
1188 | #ifdef HAVE_trunctisi2 | |
1189 | if (HAVE_trunctisi2) | |
1190 | { | |
1191 | emit_unop_insn (CODE_FOR_trunctisi2, to, from, UNKNOWN); | |
1192 | return; | |
1193 | } | |
1194 | #endif | |
1195 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1196 | return; | |
1197 | } | |
1198 | ||
1199 | if (from_mode == TImode && to_mode == HImode) | |
1200 | { | |
1201 | #ifdef HAVE_trunctihi2 | |
1202 | if (HAVE_trunctihi2) | |
1203 | { | |
1204 | emit_unop_insn (CODE_FOR_trunctihi2, to, from, UNKNOWN); | |
1205 | return; | |
1206 | } | |
1207 | #endif | |
1208 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1209 | return; | |
1210 | } | |
1211 | ||
1212 | if (from_mode == TImode && to_mode == QImode) | |
1213 | { | |
1214 | #ifdef HAVE_trunctiqi2 | |
1215 | if (HAVE_trunctiqi2) | |
1216 | { | |
1217 | emit_unop_insn (CODE_FOR_trunctiqi2, to, from, UNKNOWN); | |
1218 | return; | |
1219 | } | |
1220 | #endif | |
1221 | convert_move (to, force_reg (from_mode, from), unsignedp); | |
1222 | return; | |
1223 | } | |
1224 | ||
bbf6f052 RK |
1225 | /* Handle truncation of volatile memrefs, and so on; |
1226 | the things that couldn't be truncated directly, | |
1227 | and for which there was no special instruction. */ | |
1228 | if (GET_MODE_BITSIZE (to_mode) < GET_MODE_BITSIZE (from_mode)) | |
1229 | { | |
1230 | rtx temp = force_reg (to_mode, gen_lowpart (to_mode, from)); | |
1231 | emit_move_insn (to, temp); | |
1232 | return; | |
1233 | } | |
1234 | ||
1235 | /* Mode combination is not recognized. */ | |
1236 | abort (); | |
1237 | } | |
1238 | ||
1239 | /* Return an rtx for a value that would result | |
1240 | from converting X to mode MODE. | |
1241 | Both X and MODE may be floating, or both integer. | |
1242 | UNSIGNEDP is nonzero if X is an unsigned value. | |
1243 | This can be done by referring to a part of X in place | |
5d901c31 RS |
1244 | or by copying to a new temporary with conversion. |
1245 | ||
1246 | This function *must not* call protect_from_queue | |
1247 | except when putting X into an insn (in which case convert_move does it). */ | |
bbf6f052 RK |
1248 | |
1249 | rtx | |
1250 | convert_to_mode (mode, x, unsignedp) | |
1251 | enum machine_mode mode; | |
1252 | rtx x; | |
1253 | int unsignedp; | |
5ffe63ed RS |
1254 | { |
1255 | return convert_modes (mode, VOIDmode, x, unsignedp); | |
1256 | } | |
1257 | ||
1258 | /* Return an rtx for a value that would result | |
1259 | from converting X from mode OLDMODE to mode MODE. | |
1260 | Both modes may be floating, or both integer. | |
1261 | UNSIGNEDP is nonzero if X is an unsigned value. | |
1262 | ||
1263 | This can be done by referring to a part of X in place | |
1264 | or by copying to a new temporary with conversion. | |
1265 | ||
1266 | You can give VOIDmode for OLDMODE, if you are sure X has a nonvoid mode. | |
1267 | ||
1268 | This function *must not* call protect_from_queue | |
1269 | except when putting X into an insn (in which case convert_move does it). */ | |
1270 | ||
1271 | rtx | |
1272 | convert_modes (mode, oldmode, x, unsignedp) | |
1273 | enum machine_mode mode, oldmode; | |
1274 | rtx x; | |
1275 | int unsignedp; | |
bbf6f052 RK |
1276 | { |
1277 | register rtx temp; | |
5ffe63ed | 1278 | |
1499e0a8 RK |
1279 | /* If FROM is a SUBREG that indicates that we have already done at least |
1280 | the required extension, strip it. */ | |
1281 | ||
1282 | if (GET_CODE (x) == SUBREG && SUBREG_PROMOTED_VAR_P (x) | |
1283 | && GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))) >= GET_MODE_SIZE (mode) | |
1284 | && SUBREG_PROMOTED_UNSIGNED_P (x) == unsignedp) | |
1285 | x = gen_lowpart (mode, x); | |
bbf6f052 | 1286 | |
64791b18 RK |
1287 | if (GET_MODE (x) != VOIDmode) |
1288 | oldmode = GET_MODE (x); | |
1289 | ||
5ffe63ed | 1290 | if (mode == oldmode) |
bbf6f052 RK |
1291 | return x; |
1292 | ||
1293 | /* There is one case that we must handle specially: If we are converting | |
906c4e36 | 1294 | a CONST_INT into a mode whose size is twice HOST_BITS_PER_WIDE_INT and |
bbf6f052 RK |
1295 | we are to interpret the constant as unsigned, gen_lowpart will do |
1296 | the wrong if the constant appears negative. What we want to do is | |
1297 | make the high-order word of the constant zero, not all ones. */ | |
1298 | ||
1299 | if (unsignedp && GET_MODE_CLASS (mode) == MODE_INT | |
906c4e36 | 1300 | && GET_MODE_BITSIZE (mode) == 2 * HOST_BITS_PER_WIDE_INT |
bbf6f052 | 1301 | && GET_CODE (x) == CONST_INT && INTVAL (x) < 0) |
96ff8a16 ILT |
1302 | { |
1303 | HOST_WIDE_INT val = INTVAL (x); | |
1304 | ||
1305 | if (oldmode != VOIDmode | |
1306 | && HOST_BITS_PER_WIDE_INT > GET_MODE_BITSIZE (oldmode)) | |
1307 | { | |
1308 | int width = GET_MODE_BITSIZE (oldmode); | |
1309 | ||
1310 | /* We need to zero extend VAL. */ | |
1311 | val &= ((HOST_WIDE_INT) 1 << width) - 1; | |
1312 | } | |
1313 | ||
1314 | return immed_double_const (val, (HOST_WIDE_INT) 0, mode); | |
1315 | } | |
bbf6f052 RK |
1316 | |
1317 | /* We can do this with a gen_lowpart if both desired and current modes | |
1318 | are integer, and this is either a constant integer, a register, or a | |
ba2e110c RK |
1319 | non-volatile MEM. Except for the constant case where MODE is no |
1320 | wider than HOST_BITS_PER_WIDE_INT, we must be narrowing the operand. */ | |
bbf6f052 | 1321 | |
ba2e110c RK |
1322 | if ((GET_CODE (x) == CONST_INT |
1323 | && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT) | |
bbf6f052 | 1324 | || (GET_MODE_CLASS (mode) == MODE_INT |
5ffe63ed | 1325 | && GET_MODE_CLASS (oldmode) == MODE_INT |
bbf6f052 | 1326 | && (GET_CODE (x) == CONST_DOUBLE |
5ffe63ed | 1327 | || (GET_MODE_SIZE (mode) <= GET_MODE_SIZE (oldmode) |
d57c66da JW |
1328 | && ((GET_CODE (x) == MEM && ! MEM_VOLATILE_P (x) |
1329 | && direct_load[(int) mode]) | |
2bf29316 JW |
1330 | || (GET_CODE (x) == REG |
1331 | && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode), | |
1332 | GET_MODE_BITSIZE (GET_MODE (x))))))))) | |
ba2e110c RK |
1333 | { |
1334 | /* ?? If we don't know OLDMODE, we have to assume here that | |
1335 | X does not need sign- or zero-extension. This may not be | |
1336 | the case, but it's the best we can do. */ | |
1337 | if (GET_CODE (x) == CONST_INT && oldmode != VOIDmode | |
1338 | && GET_MODE_SIZE (mode) > GET_MODE_SIZE (oldmode)) | |
1339 | { | |
1340 | HOST_WIDE_INT val = INTVAL (x); | |
1341 | int width = GET_MODE_BITSIZE (oldmode); | |
1342 | ||
1343 | /* We must sign or zero-extend in this case. Start by | |
1344 | zero-extending, then sign extend if we need to. */ | |
1345 | val &= ((HOST_WIDE_INT) 1 << width) - 1; | |
1346 | if (! unsignedp | |
1347 | && (val & ((HOST_WIDE_INT) 1 << (width - 1)))) | |
1348 | val |= (HOST_WIDE_INT) (-1) << width; | |
1349 | ||
1350 | return GEN_INT (val); | |
1351 | } | |
1352 | ||
1353 | return gen_lowpart (mode, x); | |
1354 | } | |
bbf6f052 RK |
1355 | |
1356 | temp = gen_reg_rtx (mode); | |
1357 | convert_move (temp, x, unsignedp); | |
1358 | return temp; | |
1359 | } | |
1360 | \f | |
1361 | /* Generate several move instructions to copy LEN bytes | |
1362 | from block FROM to block TO. (These are MEM rtx's with BLKmode). | |
1363 | The caller must pass FROM and TO | |
1364 | through protect_from_queue before calling. | |
1365 | ALIGN (in bytes) is maximum alignment we can assume. */ | |
1366 | ||
bbf6f052 RK |
1367 | static void |
1368 | move_by_pieces (to, from, len, align) | |
1369 | rtx to, from; | |
1370 | int len, align; | |
1371 | { | |
1372 | struct move_by_pieces data; | |
1373 | rtx to_addr = XEXP (to, 0), from_addr = XEXP (from, 0); | |
e87b4f3f | 1374 | int max_size = MOVE_MAX + 1; |
bbf6f052 RK |
1375 | |
1376 | data.offset = 0; | |
1377 | data.to_addr = to_addr; | |
1378 | data.from_addr = from_addr; | |
1379 | data.to = to; | |
1380 | data.from = from; | |
1381 | data.autinc_to | |
1382 | = (GET_CODE (to_addr) == PRE_INC || GET_CODE (to_addr) == PRE_DEC | |
1383 | || GET_CODE (to_addr) == POST_INC || GET_CODE (to_addr) == POST_DEC); | |
1384 | data.autinc_from | |
1385 | = (GET_CODE (from_addr) == PRE_INC || GET_CODE (from_addr) == PRE_DEC | |
1386 | || GET_CODE (from_addr) == POST_INC | |
1387 | || GET_CODE (from_addr) == POST_DEC); | |
1388 | ||
1389 | data.explicit_inc_from = 0; | |
1390 | data.explicit_inc_to = 0; | |
1391 | data.reverse | |
1392 | = (GET_CODE (to_addr) == PRE_DEC || GET_CODE (to_addr) == POST_DEC); | |
1393 | if (data.reverse) data.offset = len; | |
1394 | data.len = len; | |
1395 | ||
e9cf6a97 JW |
1396 | data.to_struct = MEM_IN_STRUCT_P (to); |
1397 | data.from_struct = MEM_IN_STRUCT_P (from); | |
1398 | ||
bbf6f052 RK |
1399 | /* If copying requires more than two move insns, |
1400 | copy addresses to registers (to make displacements shorter) | |
1401 | and use post-increment if available. */ | |
1402 | if (!(data.autinc_from && data.autinc_to) | |
1403 | && move_by_pieces_ninsns (len, align) > 2) | |
1404 | { | |
1405 | #ifdef HAVE_PRE_DECREMENT | |
1406 | if (data.reverse && ! data.autinc_from) | |
1407 | { | |
1408 | data.from_addr = copy_addr_to_reg (plus_constant (from_addr, len)); | |
1409 | data.autinc_from = 1; | |
1410 | data.explicit_inc_from = -1; | |
1411 | } | |
1412 | #endif | |
1413 | #ifdef HAVE_POST_INCREMENT | |
1414 | if (! data.autinc_from) | |
1415 | { | |
1416 | data.from_addr = copy_addr_to_reg (from_addr); | |
1417 | data.autinc_from = 1; | |
1418 | data.explicit_inc_from = 1; | |
1419 | } | |
1420 | #endif | |
1421 | if (!data.autinc_from && CONSTANT_P (from_addr)) | |
1422 | data.from_addr = copy_addr_to_reg (from_addr); | |
1423 | #ifdef HAVE_PRE_DECREMENT | |
1424 | if (data.reverse && ! data.autinc_to) | |
1425 | { | |
1426 | data.to_addr = copy_addr_to_reg (plus_constant (to_addr, len)); | |
1427 | data.autinc_to = 1; | |
1428 | data.explicit_inc_to = -1; | |
1429 | } | |
1430 | #endif | |
1431 | #ifdef HAVE_POST_INCREMENT | |
1432 | if (! data.reverse && ! data.autinc_to) | |
1433 | { | |
1434 | data.to_addr = copy_addr_to_reg (to_addr); | |
1435 | data.autinc_to = 1; | |
1436 | data.explicit_inc_to = 1; | |
1437 | } | |
1438 | #endif | |
1439 | if (!data.autinc_to && CONSTANT_P (to_addr)) | |
1440 | data.to_addr = copy_addr_to_reg (to_addr); | |
1441 | } | |
1442 | ||
c7a7ac46 | 1443 | if (! SLOW_UNALIGNED_ACCESS |
e87b4f3f | 1444 | || align > MOVE_MAX || align >= BIGGEST_ALIGNMENT / BITS_PER_UNIT) |
bbf6f052 | 1445 | align = MOVE_MAX; |
bbf6f052 RK |
1446 | |
1447 | /* First move what we can in the largest integer mode, then go to | |
1448 | successively smaller modes. */ | |
1449 | ||
1450 | while (max_size > 1) | |
1451 | { | |
1452 | enum machine_mode mode = VOIDmode, tmode; | |
1453 | enum insn_code icode; | |
1454 | ||
e7c33f54 RK |
1455 | for (tmode = GET_CLASS_NARROWEST_MODE (MODE_INT); |
1456 | tmode != VOIDmode; tmode = GET_MODE_WIDER_MODE (tmode)) | |
1457 | if (GET_MODE_SIZE (tmode) < max_size) | |
bbf6f052 RK |
1458 | mode = tmode; |
1459 | ||
1460 | if (mode == VOIDmode) | |
1461 | break; | |
1462 | ||
1463 | icode = mov_optab->handlers[(int) mode].insn_code; | |
1464 | if (icode != CODE_FOR_nothing | |
1465 | && align >= MIN (BIGGEST_ALIGNMENT / BITS_PER_UNIT, | |
1466 | GET_MODE_SIZE (mode))) | |
1467 | move_by_pieces_1 (GEN_FCN (icode), mode, &data); | |
1468 | ||
1469 | max_size = GET_MODE_SIZE (mode); | |
1470 | } | |
1471 | ||
1472 | /* The code above should have handled everything. */ | |
2a8e278c | 1473 | if (data.len > 0) |
bbf6f052 RK |
1474 | abort (); |
1475 | } | |
1476 | ||
1477 | /* Return number of insns required to move L bytes by pieces. | |
1478 | ALIGN (in bytes) is maximum alignment we can assume. */ | |
1479 | ||
1480 | static int | |
1481 | move_by_pieces_ninsns (l, align) | |
1482 | unsigned int l; | |
1483 | int align; | |
1484 | { | |
1485 | register int n_insns = 0; | |
e87b4f3f | 1486 | int max_size = MOVE_MAX + 1; |
bbf6f052 | 1487 | |
c7a7ac46 | 1488 | if (! SLOW_UNALIGNED_ACCESS |
e87b4f3f | 1489 | || align > MOVE_MAX || align >= BIGGEST_ALIGNMENT / BITS_PER_UNIT) |
bbf6f052 | 1490 | align = MOVE_MAX; |
bbf6f052 RK |
1491 | |
1492 | while (max_size > 1) | |
1493 | { | |
1494 | enum machine_mode mode = VOIDmode, tmode; | |
1495 | enum insn_code icode; | |
1496 | ||
e7c33f54 RK |
1497 | for (tmode = GET_CLASS_NARROWEST_MODE (MODE_INT); |
1498 | tmode != VOIDmode; tmode = GET_MODE_WIDER_MODE (tmode)) | |
1499 | if (GET_MODE_SIZE (tmode) < max_size) | |
bbf6f052 RK |
1500 | mode = tmode; |
1501 | ||
1502 | if (mode == VOIDmode) | |
1503 | break; | |
1504 | ||
1505 | icode = mov_optab->handlers[(int) mode].insn_code; | |
1506 | if (icode != CODE_FOR_nothing | |
1507 | && align >= MIN (BIGGEST_ALIGNMENT / BITS_PER_UNIT, | |
1508 | GET_MODE_SIZE (mode))) | |
1509 | n_insns += l / GET_MODE_SIZE (mode), l %= GET_MODE_SIZE (mode); | |
1510 | ||
1511 | max_size = GET_MODE_SIZE (mode); | |
1512 | } | |
1513 | ||
1514 | return n_insns; | |
1515 | } | |
1516 | ||
1517 | /* Subroutine of move_by_pieces. Move as many bytes as appropriate | |
1518 | with move instructions for mode MODE. GENFUN is the gen_... function | |
1519 | to make a move insn for that mode. DATA has all the other info. */ | |
1520 | ||
1521 | static void | |
1522 | move_by_pieces_1 (genfun, mode, data) | |
eae4b970 | 1523 | rtx (*genfun) PROTO ((rtx, ...)); |
bbf6f052 RK |
1524 | enum machine_mode mode; |
1525 | struct move_by_pieces *data; | |
1526 | { | |
1527 | register int size = GET_MODE_SIZE (mode); | |
1528 | register rtx to1, from1; | |
1529 | ||
1530 | while (data->len >= size) | |
1531 | { | |
1532 | if (data->reverse) data->offset -= size; | |
1533 | ||
1534 | to1 = (data->autinc_to | |
38a448ca | 1535 | ? gen_rtx_MEM (mode, data->to_addr) |
effbcc6a RK |
1536 | : copy_rtx (change_address (data->to, mode, |
1537 | plus_constant (data->to_addr, | |
1538 | data->offset)))); | |
e9cf6a97 | 1539 | MEM_IN_STRUCT_P (to1) = data->to_struct; |
effbcc6a | 1540 | |
db3cf6fb MS |
1541 | from1 |
1542 | = (data->autinc_from | |
38a448ca | 1543 | ? gen_rtx_MEM (mode, data->from_addr) |
db3cf6fb MS |
1544 | : copy_rtx (change_address (data->from, mode, |
1545 | plus_constant (data->from_addr, | |
1546 | data->offset)))); | |
e9cf6a97 | 1547 | MEM_IN_STRUCT_P (from1) = data->from_struct; |
bbf6f052 RK |
1548 | |
1549 | #ifdef HAVE_PRE_DECREMENT | |
1550 | if (data->explicit_inc_to < 0) | |
906c4e36 | 1551 | emit_insn (gen_add2_insn (data->to_addr, GEN_INT (-size))); |
bbf6f052 | 1552 | if (data->explicit_inc_from < 0) |
906c4e36 | 1553 | emit_insn (gen_add2_insn (data->from_addr, GEN_INT (-size))); |
bbf6f052 RK |
1554 | #endif |
1555 | ||
1556 | emit_insn ((*genfun) (to1, from1)); | |
1557 | #ifdef HAVE_POST_INCREMENT | |
1558 | if (data->explicit_inc_to > 0) | |
906c4e36 | 1559 | emit_insn (gen_add2_insn (data->to_addr, GEN_INT (size))); |
bbf6f052 | 1560 | if (data->explicit_inc_from > 0) |
906c4e36 | 1561 | emit_insn (gen_add2_insn (data->from_addr, GEN_INT (size))); |
bbf6f052 RK |
1562 | #endif |
1563 | ||
1564 | if (! data->reverse) data->offset += size; | |
1565 | ||
1566 | data->len -= size; | |
1567 | } | |
1568 | } | |
1569 | \f | |
1570 | /* Emit code to move a block Y to a block X. | |
1571 | This may be done with string-move instructions, | |
1572 | with multiple scalar move instructions, or with a library call. | |
1573 | ||
1574 | Both X and Y must be MEM rtx's (perhaps inside VOLATILE) | |
1575 | with mode BLKmode. | |
1576 | SIZE is an rtx that says how long they are. | |
1577 | ALIGN is the maximum alignment we can assume they have, | |
e9a25f70 | 1578 | measured in bytes. |
bbf6f052 | 1579 | |
e9a25f70 JL |
1580 | Return the address of the new block, if memcpy is called and returns it, |
1581 | 0 otherwise. */ | |
1582 | ||
1583 | rtx | |
bbf6f052 RK |
1584 | emit_block_move (x, y, size, align) |
1585 | rtx x, y; | |
1586 | rtx size; | |
1587 | int align; | |
1588 | { | |
e9a25f70 JL |
1589 | rtx retval = 0; |
1590 | ||
bbf6f052 RK |
1591 | if (GET_MODE (x) != BLKmode) |
1592 | abort (); | |
1593 | ||
1594 | if (GET_MODE (y) != BLKmode) | |
1595 | abort (); | |
1596 | ||
1597 | x = protect_from_queue (x, 1); | |
1598 | y = protect_from_queue (y, 0); | |
5d901c31 | 1599 | size = protect_from_queue (size, 0); |
bbf6f052 RK |
1600 | |
1601 | if (GET_CODE (x) != MEM) | |
1602 | abort (); | |
1603 | if (GET_CODE (y) != MEM) | |
1604 | abort (); | |
1605 | if (size == 0) | |
1606 | abort (); | |
1607 | ||
1608 | if (GET_CODE (size) == CONST_INT | |
906c4e36 | 1609 | && (move_by_pieces_ninsns (INTVAL (size), align) < MOVE_RATIO)) |
bbf6f052 RK |
1610 | move_by_pieces (x, y, INTVAL (size), align); |
1611 | else | |
1612 | { | |
1613 | /* Try the most limited insn first, because there's no point | |
1614 | including more than one in the machine description unless | |
1615 | the more limited one has some advantage. */ | |
266007a7 | 1616 | |
0bba3f6f | 1617 | rtx opalign = GEN_INT (align); |
266007a7 RK |
1618 | enum machine_mode mode; |
1619 | ||
1620 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode; | |
1621 | mode = GET_MODE_WIDER_MODE (mode)) | |
bbf6f052 | 1622 | { |
266007a7 | 1623 | enum insn_code code = movstr_optab[(int) mode]; |
266007a7 RK |
1624 | |
1625 | if (code != CODE_FOR_nothing | |
803090c4 RK |
1626 | /* We don't need MODE to be narrower than BITS_PER_HOST_WIDE_INT |
1627 | here because if SIZE is less than the mode mask, as it is | |
8008b228 | 1628 | returned by the macro, it will definitely be less than the |
803090c4 | 1629 | actual mode mask. */ |
8ca00751 RK |
1630 | && ((GET_CODE (size) == CONST_INT |
1631 | && ((unsigned HOST_WIDE_INT) INTVAL (size) | |
e5e809f4 | 1632 | <= (GET_MODE_MASK (mode) >> 1))) |
8ca00751 | 1633 | || GET_MODE_BITSIZE (mode) >= BITS_PER_WORD) |
0bba3f6f RK |
1634 | && (insn_operand_predicate[(int) code][0] == 0 |
1635 | || (*insn_operand_predicate[(int) code][0]) (x, BLKmode)) | |
1636 | && (insn_operand_predicate[(int) code][1] == 0 | |
1637 | || (*insn_operand_predicate[(int) code][1]) (y, BLKmode)) | |
1638 | && (insn_operand_predicate[(int) code][3] == 0 | |
1639 | || (*insn_operand_predicate[(int) code][3]) (opalign, | |
1640 | VOIDmode))) | |
bbf6f052 | 1641 | { |
1ba1e2a8 | 1642 | rtx op2; |
266007a7 RK |
1643 | rtx last = get_last_insn (); |
1644 | rtx pat; | |
1645 | ||
1ba1e2a8 | 1646 | op2 = convert_to_mode (mode, size, 1); |
0bba3f6f RK |
1647 | if (insn_operand_predicate[(int) code][2] != 0 |
1648 | && ! (*insn_operand_predicate[(int) code][2]) (op2, mode)) | |
266007a7 RK |
1649 | op2 = copy_to_mode_reg (mode, op2); |
1650 | ||
1651 | pat = GEN_FCN ((int) code) (x, y, op2, opalign); | |
1652 | if (pat) | |
1653 | { | |
1654 | emit_insn (pat); | |
e9a25f70 | 1655 | return 0; |
266007a7 RK |
1656 | } |
1657 | else | |
1658 | delete_insns_since (last); | |
bbf6f052 RK |
1659 | } |
1660 | } | |
bbf6f052 RK |
1661 | |
1662 | #ifdef TARGET_MEM_FUNCTIONS | |
e9a25f70 JL |
1663 | retval |
1664 | = emit_library_call_value (memcpy_libfunc, NULL_RTX, 0, | |
1665 | ptr_mode, 3, XEXP (x, 0), Pmode, | |
1666 | XEXP (y, 0), Pmode, | |
1667 | convert_to_mode (TYPE_MODE (sizetype), size, | |
1668 | TREE_UNSIGNED (sizetype)), | |
1669 | TYPE_MODE (sizetype)); | |
bbf6f052 | 1670 | #else |
d562e42e | 1671 | emit_library_call (bcopy_libfunc, 0, |
bbf6f052 RK |
1672 | VOIDmode, 3, XEXP (y, 0), Pmode, |
1673 | XEXP (x, 0), Pmode, | |
3b6f75e2 JW |
1674 | convert_to_mode (TYPE_MODE (integer_type_node), size, |
1675 | TREE_UNSIGNED (integer_type_node)), | |
1676 | TYPE_MODE (integer_type_node)); | |
bbf6f052 RK |
1677 | #endif |
1678 | } | |
e9a25f70 JL |
1679 | |
1680 | return retval; | |
bbf6f052 RK |
1681 | } |
1682 | \f | |
1683 | /* Copy all or part of a value X into registers starting at REGNO. | |
1684 | The number of registers to be filled is NREGS. */ | |
1685 | ||
1686 | void | |
1687 | move_block_to_reg (regno, x, nregs, mode) | |
1688 | int regno; | |
1689 | rtx x; | |
1690 | int nregs; | |
1691 | enum machine_mode mode; | |
1692 | { | |
1693 | int i; | |
381127e8 RL |
1694 | #ifdef HAVE_load_multiple |
1695 | rtx pat; | |
1696 | rtx last; | |
1697 | #endif | |
bbf6f052 | 1698 | |
72bb9717 RK |
1699 | if (nregs == 0) |
1700 | return; | |
1701 | ||
bbf6f052 RK |
1702 | if (CONSTANT_P (x) && ! LEGITIMATE_CONSTANT_P (x)) |
1703 | x = validize_mem (force_const_mem (mode, x)); | |
1704 | ||
1705 | /* See if the machine can do this with a load multiple insn. */ | |
1706 | #ifdef HAVE_load_multiple | |
c3a02afe | 1707 | if (HAVE_load_multiple) |
bbf6f052 | 1708 | { |
c3a02afe | 1709 | last = get_last_insn (); |
38a448ca | 1710 | pat = gen_load_multiple (gen_rtx_REG (word_mode, regno), x, |
c3a02afe RK |
1711 | GEN_INT (nregs)); |
1712 | if (pat) | |
1713 | { | |
1714 | emit_insn (pat); | |
1715 | return; | |
1716 | } | |
1717 | else | |
1718 | delete_insns_since (last); | |
bbf6f052 | 1719 | } |
bbf6f052 RK |
1720 | #endif |
1721 | ||
1722 | for (i = 0; i < nregs; i++) | |
38a448ca | 1723 | emit_move_insn (gen_rtx_REG (word_mode, regno + i), |
bbf6f052 RK |
1724 | operand_subword_force (x, i, mode)); |
1725 | } | |
1726 | ||
1727 | /* Copy all or part of a BLKmode value X out of registers starting at REGNO. | |
0040593d JW |
1728 | The number of registers to be filled is NREGS. SIZE indicates the number |
1729 | of bytes in the object X. */ | |
1730 | ||
bbf6f052 RK |
1731 | |
1732 | void | |
0040593d | 1733 | move_block_from_reg (regno, x, nregs, size) |
bbf6f052 RK |
1734 | int regno; |
1735 | rtx x; | |
1736 | int nregs; | |
0040593d | 1737 | int size; |
bbf6f052 RK |
1738 | { |
1739 | int i; | |
381127e8 RL |
1740 | #ifdef HAVE_store_multiple |
1741 | rtx pat; | |
1742 | rtx last; | |
1743 | #endif | |
58a32c5c | 1744 | enum machine_mode mode; |
bbf6f052 | 1745 | |
58a32c5c DE |
1746 | /* If SIZE is that of a mode no bigger than a word, just use that |
1747 | mode's store operation. */ | |
1748 | if (size <= UNITS_PER_WORD | |
1749 | && (mode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0)) != BLKmode) | |
1750 | { | |
1751 | emit_move_insn (change_address (x, mode, NULL), | |
38a448ca | 1752 | gen_rtx_REG (mode, regno)); |
58a32c5c DE |
1753 | return; |
1754 | } | |
1755 | ||
0040593d | 1756 | /* Blocks smaller than a word on a BYTES_BIG_ENDIAN machine must be aligned |
58a32c5c DE |
1757 | to the left before storing to memory. Note that the previous test |
1758 | doesn't handle all cases (e.g. SIZE == 3). */ | |
0040593d JW |
1759 | if (size < UNITS_PER_WORD && BYTES_BIG_ENDIAN) |
1760 | { | |
1761 | rtx tem = operand_subword (x, 0, 1, BLKmode); | |
1762 | rtx shift; | |
1763 | ||
1764 | if (tem == 0) | |
1765 | abort (); | |
1766 | ||
1767 | shift = expand_shift (LSHIFT_EXPR, word_mode, | |
38a448ca | 1768 | gen_rtx_REG (word_mode, regno), |
0040593d JW |
1769 | build_int_2 ((UNITS_PER_WORD - size) |
1770 | * BITS_PER_UNIT, 0), NULL_RTX, 0); | |
1771 | emit_move_insn (tem, shift); | |
1772 | return; | |
1773 | } | |
1774 | ||
bbf6f052 RK |
1775 | /* See if the machine can do this with a store multiple insn. */ |
1776 | #ifdef HAVE_store_multiple | |
c3a02afe | 1777 | if (HAVE_store_multiple) |
bbf6f052 | 1778 | { |
c3a02afe | 1779 | last = get_last_insn (); |
38a448ca | 1780 | pat = gen_store_multiple (x, gen_rtx_REG (word_mode, regno), |
c3a02afe RK |
1781 | GEN_INT (nregs)); |
1782 | if (pat) | |
1783 | { | |
1784 | emit_insn (pat); | |
1785 | return; | |
1786 | } | |
1787 | else | |
1788 | delete_insns_since (last); | |
bbf6f052 | 1789 | } |
bbf6f052 RK |
1790 | #endif |
1791 | ||
1792 | for (i = 0; i < nregs; i++) | |
1793 | { | |
1794 | rtx tem = operand_subword (x, i, 1, BLKmode); | |
1795 | ||
1796 | if (tem == 0) | |
1797 | abort (); | |
1798 | ||
38a448ca | 1799 | emit_move_insn (tem, gen_rtx_REG (word_mode, regno + i)); |
bbf6f052 RK |
1800 | } |
1801 | } | |
1802 | ||
fffa9c1d JW |
1803 | /* Emit code to move a block Y to a block X, where X is non-consecutive |
1804 | registers represented by a PARALLEL. */ | |
1805 | ||
1806 | void | |
1807 | emit_group_load (x, y) | |
1808 | rtx x, y; | |
1809 | { | |
1810 | rtx target_reg, source; | |
1811 | int i; | |
1812 | ||
1813 | if (GET_CODE (x) != PARALLEL) | |
1814 | abort (); | |
1815 | ||
1816 | /* Check for a NULL entry, used to indicate that the parameter goes | |
1817 | both on the stack and in registers. */ | |
1818 | if (XEXP (XVECEXP (x, 0, 0), 0)) | |
1819 | i = 0; | |
1820 | else | |
1821 | i = 1; | |
1822 | ||
1823 | for (; i < XVECLEN (x, 0); i++) | |
1824 | { | |
1825 | rtx element = XVECEXP (x, 0, i); | |
1826 | ||
1827 | target_reg = XEXP (element, 0); | |
1828 | ||
1829 | if (GET_CODE (y) == MEM) | |
1830 | source = change_address (y, GET_MODE (target_reg), | |
1831 | plus_constant (XEXP (y, 0), | |
1832 | INTVAL (XEXP (element, 1)))); | |
1833 | else if (XEXP (element, 1) == const0_rtx) | |
1834 | { | |
1835 | if (GET_MODE (target_reg) == GET_MODE (y)) | |
1836 | source = y; | |
eaa9b4d9 MM |
1837 | /* Allow for the target_reg to be smaller than the input register |
1838 | to allow for AIX with 4 DF arguments after a single SI arg. The | |
1839 | last DF argument will only load 1 word into the integer registers, | |
1840 | but load a DF value into the float registers. */ | |
aff4d29b JW |
1841 | else if ((GET_MODE_SIZE (GET_MODE (target_reg)) |
1842 | <= GET_MODE_SIZE (GET_MODE (y))) | |
1843 | && GET_MODE (target_reg) == word_mode) | |
1844 | /* This might be a const_double, so we can't just use SUBREG. */ | |
1845 | source = operand_subword (y, 0, 0, VOIDmode); | |
d7d775a0 JW |
1846 | else if (GET_MODE_SIZE (GET_MODE (target_reg)) |
1847 | == GET_MODE_SIZE (GET_MODE (y))) | |
1848 | source = gen_lowpart (GET_MODE (target_reg), y); | |
fffa9c1d JW |
1849 | else |
1850 | abort (); | |
1851 | } | |
1852 | else | |
1853 | abort (); | |
1854 | ||
1855 | emit_move_insn (target_reg, source); | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | /* Emit code to move a block Y to a block X, where Y is non-consecutive | |
1860 | registers represented by a PARALLEL. */ | |
1861 | ||
1862 | void | |
1863 | emit_group_store (x, y) | |
1864 | rtx x, y; | |
1865 | { | |
1866 | rtx source_reg, target; | |
1867 | int i; | |
1868 | ||
1869 | if (GET_CODE (y) != PARALLEL) | |
1870 | abort (); | |
1871 | ||
1872 | /* Check for a NULL entry, used to indicate that the parameter goes | |
1873 | both on the stack and in registers. */ | |
1874 | if (XEXP (XVECEXP (y, 0, 0), 0)) | |
1875 | i = 0; | |
1876 | else | |
1877 | i = 1; | |
1878 | ||
1879 | for (; i < XVECLEN (y, 0); i++) | |
1880 | { | |
1881 | rtx element = XVECEXP (y, 0, i); | |
1882 | ||
1883 | source_reg = XEXP (element, 0); | |
1884 | ||
1885 | if (GET_CODE (x) == MEM) | |
1886 | target = change_address (x, GET_MODE (source_reg), | |
1887 | plus_constant (XEXP (x, 0), | |
1888 | INTVAL (XEXP (element, 1)))); | |
1889 | else if (XEXP (element, 1) == const0_rtx) | |
71bc0330 JW |
1890 | { |
1891 | target = x; | |
1892 | if (GET_MODE (target) != GET_MODE (source_reg)) | |
1893 | target = gen_lowpart (GET_MODE (source_reg), target); | |
1894 | } | |
fffa9c1d JW |
1895 | else |
1896 | abort (); | |
1897 | ||
1898 | emit_move_insn (target, source_reg); | |
1899 | } | |
1900 | } | |
1901 | ||
94b25f81 RK |
1902 | /* Add a USE expression for REG to the (possibly empty) list pointed |
1903 | to by CALL_FUSAGE. REG must denote a hard register. */ | |
bbf6f052 RK |
1904 | |
1905 | void | |
b3f8cf4a RK |
1906 | use_reg (call_fusage, reg) |
1907 | rtx *call_fusage, reg; | |
1908 | { | |
0304dfbb DE |
1909 | if (GET_CODE (reg) != REG |
1910 | || REGNO (reg) >= FIRST_PSEUDO_REGISTER) | |
b3f8cf4a RK |
1911 | abort(); |
1912 | ||
1913 | *call_fusage | |
38a448ca RH |
1914 | = gen_rtx_EXPR_LIST (VOIDmode, |
1915 | gen_rtx_USE (VOIDmode, reg), *call_fusage); | |
b3f8cf4a RK |
1916 | } |
1917 | ||
94b25f81 RK |
1918 | /* Add USE expressions to *CALL_FUSAGE for each of NREGS consecutive regs, |
1919 | starting at REGNO. All of these registers must be hard registers. */ | |
b3f8cf4a RK |
1920 | |
1921 | void | |
0304dfbb DE |
1922 | use_regs (call_fusage, regno, nregs) |
1923 | rtx *call_fusage; | |
bbf6f052 RK |
1924 | int regno; |
1925 | int nregs; | |
1926 | { | |
0304dfbb | 1927 | int i; |
bbf6f052 | 1928 | |
0304dfbb DE |
1929 | if (regno + nregs > FIRST_PSEUDO_REGISTER) |
1930 | abort (); | |
1931 | ||
1932 | for (i = 0; i < nregs; i++) | |
38a448ca | 1933 | use_reg (call_fusage, gen_rtx_REG (reg_raw_mode[regno + i], regno + i)); |
bbf6f052 | 1934 | } |
fffa9c1d JW |
1935 | |
1936 | /* Add USE expressions to *CALL_FUSAGE for each REG contained in the | |
1937 | PARALLEL REGS. This is for calls that pass values in multiple | |
1938 | non-contiguous locations. The Irix 6 ABI has examples of this. */ | |
1939 | ||
1940 | void | |
1941 | use_group_regs (call_fusage, regs) | |
1942 | rtx *call_fusage; | |
1943 | rtx regs; | |
1944 | { | |
1945 | int i; | |
1946 | ||
6bd35f86 DE |
1947 | for (i = 0; i < XVECLEN (regs, 0); i++) |
1948 | { | |
1949 | rtx reg = XEXP (XVECEXP (regs, 0, i), 0); | |
fffa9c1d | 1950 | |
6bd35f86 DE |
1951 | /* A NULL entry means the parameter goes both on the stack and in |
1952 | registers. This can also be a MEM for targets that pass values | |
1953 | partially on the stack and partially in registers. */ | |
e9a25f70 | 1954 | if (reg != 0 && GET_CODE (reg) == REG) |
6bd35f86 DE |
1955 | use_reg (call_fusage, reg); |
1956 | } | |
fffa9c1d | 1957 | } |
bbf6f052 | 1958 | \f |
9de08200 RK |
1959 | /* Generate several move instructions to clear LEN bytes of block TO. |
1960 | (A MEM rtx with BLKmode). The caller must pass TO through | |
1961 | protect_from_queue before calling. ALIGN (in bytes) is maximum alignment | |
1962 | we can assume. */ | |
1963 | ||
1964 | static void | |
1965 | clear_by_pieces (to, len, align) | |
1966 | rtx to; | |
1967 | int len, align; | |
1968 | { | |
1969 | struct clear_by_pieces data; | |
1970 | rtx to_addr = XEXP (to, 0); | |
1971 | int max_size = MOVE_MAX + 1; | |
1972 | ||
1973 | data.offset = 0; | |
1974 | data.to_addr = to_addr; | |
1975 | data.to = to; | |
1976 | data.autinc_to | |
1977 | = (GET_CODE (to_addr) == PRE_INC || GET_CODE (to_addr) == PRE_DEC | |
1978 | || GET_CODE (to_addr) == POST_INC || GET_CODE (to_addr) == POST_DEC); | |
1979 | ||
1980 | data.explicit_inc_to = 0; | |
1981 | data.reverse | |
1982 | = (GET_CODE (to_addr) == PRE_DEC || GET_CODE (to_addr) == POST_DEC); | |
1983 | if (data.reverse) data.offset = len; | |
1984 | data.len = len; | |
1985 | ||
1986 | data.to_struct = MEM_IN_STRUCT_P (to); | |
1987 | ||
1988 | /* If copying requires more than two move insns, | |
1989 | copy addresses to registers (to make displacements shorter) | |
1990 | and use post-increment if available. */ | |
1991 | if (!data.autinc_to | |
1992 | && move_by_pieces_ninsns (len, align) > 2) | |
1993 | { | |
1994 | #ifdef HAVE_PRE_DECREMENT | |
1995 | if (data.reverse && ! data.autinc_to) | |
1996 | { | |
1997 | data.to_addr = copy_addr_to_reg (plus_constant (to_addr, len)); | |
1998 | data.autinc_to = 1; | |
1999 | data.explicit_inc_to = -1; | |
2000 | } | |
2001 | #endif | |
2002 | #ifdef HAVE_POST_INCREMENT | |
2003 | if (! data.reverse && ! data.autinc_to) | |
2004 | { | |
2005 | data.to_addr = copy_addr_to_reg (to_addr); | |
2006 | data.autinc_to = 1; | |
2007 | data.explicit_inc_to = 1; | |
2008 | } | |
2009 | #endif | |
2010 | if (!data.autinc_to && CONSTANT_P (to_addr)) | |
2011 | data.to_addr = copy_addr_to_reg (to_addr); | |
2012 | } | |
2013 | ||
2014 | if (! SLOW_UNALIGNED_ACCESS | |
2015 | || align > MOVE_MAX || align >= BIGGEST_ALIGNMENT / BITS_PER_UNIT) | |
2016 | align = MOVE_MAX; | |
2017 | ||
2018 | /* First move what we can in the largest integer mode, then go to | |
2019 | successively smaller modes. */ | |
2020 | ||
2021 | while (max_size > 1) | |
2022 | { | |
2023 | enum machine_mode mode = VOIDmode, tmode; | |
2024 | enum insn_code icode; | |
2025 | ||
2026 | for (tmode = GET_CLASS_NARROWEST_MODE (MODE_INT); | |
2027 | tmode != VOIDmode; tmode = GET_MODE_WIDER_MODE (tmode)) | |
2028 | if (GET_MODE_SIZE (tmode) < max_size) | |
2029 | mode = tmode; | |
2030 | ||
2031 | if (mode == VOIDmode) | |
2032 | break; | |
2033 | ||
2034 | icode = mov_optab->handlers[(int) mode].insn_code; | |
2035 | if (icode != CODE_FOR_nothing | |
2036 | && align >= MIN (BIGGEST_ALIGNMENT / BITS_PER_UNIT, | |
2037 | GET_MODE_SIZE (mode))) | |
2038 | clear_by_pieces_1 (GEN_FCN (icode), mode, &data); | |
2039 | ||
2040 | max_size = GET_MODE_SIZE (mode); | |
2041 | } | |
2042 | ||
2043 | /* The code above should have handled everything. */ | |
2044 | if (data.len != 0) | |
2045 | abort (); | |
2046 | } | |
2047 | ||
2048 | /* Subroutine of clear_by_pieces. Clear as many bytes as appropriate | |
2049 | with move instructions for mode MODE. GENFUN is the gen_... function | |
2050 | to make a move insn for that mode. DATA has all the other info. */ | |
2051 | ||
2052 | static void | |
2053 | clear_by_pieces_1 (genfun, mode, data) | |
eae4b970 | 2054 | rtx (*genfun) PROTO ((rtx, ...)); |
9de08200 RK |
2055 | enum machine_mode mode; |
2056 | struct clear_by_pieces *data; | |
2057 | { | |
2058 | register int size = GET_MODE_SIZE (mode); | |
2059 | register rtx to1; | |
2060 | ||
2061 | while (data->len >= size) | |
2062 | { | |
2063 | if (data->reverse) data->offset -= size; | |
2064 | ||
2065 | to1 = (data->autinc_to | |
38a448ca | 2066 | ? gen_rtx_MEM (mode, data->to_addr) |
effbcc6a RK |
2067 | : copy_rtx (change_address (data->to, mode, |
2068 | plus_constant (data->to_addr, | |
2069 | data->offset)))); | |
9de08200 RK |
2070 | MEM_IN_STRUCT_P (to1) = data->to_struct; |
2071 | ||
2072 | #ifdef HAVE_PRE_DECREMENT | |
2073 | if (data->explicit_inc_to < 0) | |
2074 | emit_insn (gen_add2_insn (data->to_addr, GEN_INT (-size))); | |
2075 | #endif | |
2076 | ||
2077 | emit_insn ((*genfun) (to1, const0_rtx)); | |
2078 | #ifdef HAVE_POST_INCREMENT | |
2079 | if (data->explicit_inc_to > 0) | |
2080 | emit_insn (gen_add2_insn (data->to_addr, GEN_INT (size))); | |
2081 | #endif | |
2082 | ||
2083 | if (! data->reverse) data->offset += size; | |
2084 | ||
2085 | data->len -= size; | |
2086 | } | |
2087 | } | |
2088 | \f | |
bbf6f052 | 2089 | /* Write zeros through the storage of OBJECT. |
9de08200 | 2090 | If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is |
e9a25f70 | 2091 | the maximum alignment we can is has, measured in bytes. |
bbf6f052 | 2092 | |
e9a25f70 JL |
2093 | If we call a function that returns the length of the block, return it. */ |
2094 | ||
2095 | rtx | |
9de08200 | 2096 | clear_storage (object, size, align) |
bbf6f052 | 2097 | rtx object; |
4c08eef0 | 2098 | rtx size; |
9de08200 | 2099 | int align; |
bbf6f052 | 2100 | { |
e9a25f70 JL |
2101 | rtx retval = 0; |
2102 | ||
bbf6f052 RK |
2103 | if (GET_MODE (object) == BLKmode) |
2104 | { | |
9de08200 RK |
2105 | object = protect_from_queue (object, 1); |
2106 | size = protect_from_queue (size, 0); | |
2107 | ||
2108 | if (GET_CODE (size) == CONST_INT | |
2109 | && (move_by_pieces_ninsns (INTVAL (size), align) < MOVE_RATIO)) | |
2110 | clear_by_pieces (object, INTVAL (size), align); | |
2111 | ||
2112 | else | |
2113 | { | |
2114 | /* Try the most limited insn first, because there's no point | |
2115 | including more than one in the machine description unless | |
2116 | the more limited one has some advantage. */ | |
2117 | ||
2118 | rtx opalign = GEN_INT (align); | |
2119 | enum machine_mode mode; | |
2120 | ||
2121 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode; | |
2122 | mode = GET_MODE_WIDER_MODE (mode)) | |
2123 | { | |
2124 | enum insn_code code = clrstr_optab[(int) mode]; | |
2125 | ||
2126 | if (code != CODE_FOR_nothing | |
2127 | /* We don't need MODE to be narrower than | |
2128 | BITS_PER_HOST_WIDE_INT here because if SIZE is less than | |
2129 | the mode mask, as it is returned by the macro, it will | |
2130 | definitely be less than the actual mode mask. */ | |
2131 | && ((GET_CODE (size) == CONST_INT | |
2132 | && ((unsigned HOST_WIDE_INT) INTVAL (size) | |
e5e809f4 | 2133 | <= (GET_MODE_MASK (mode) >> 1))) |
9de08200 RK |
2134 | || GET_MODE_BITSIZE (mode) >= BITS_PER_WORD) |
2135 | && (insn_operand_predicate[(int) code][0] == 0 | |
2136 | || (*insn_operand_predicate[(int) code][0]) (object, | |
2137 | BLKmode)) | |
2138 | && (insn_operand_predicate[(int) code][2] == 0 | |
2139 | || (*insn_operand_predicate[(int) code][2]) (opalign, | |
2140 | VOIDmode))) | |
2141 | { | |
2142 | rtx op1; | |
2143 | rtx last = get_last_insn (); | |
2144 | rtx pat; | |
2145 | ||
2146 | op1 = convert_to_mode (mode, size, 1); | |
2147 | if (insn_operand_predicate[(int) code][1] != 0 | |
2148 | && ! (*insn_operand_predicate[(int) code][1]) (op1, | |
2149 | mode)) | |
2150 | op1 = copy_to_mode_reg (mode, op1); | |
2151 | ||
2152 | pat = GEN_FCN ((int) code) (object, op1, opalign); | |
2153 | if (pat) | |
2154 | { | |
2155 | emit_insn (pat); | |
e9a25f70 | 2156 | return 0; |
9de08200 RK |
2157 | } |
2158 | else | |
2159 | delete_insns_since (last); | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | ||
bbf6f052 | 2164 | #ifdef TARGET_MEM_FUNCTIONS |
e9a25f70 JL |
2165 | retval |
2166 | = emit_library_call_value (memset_libfunc, NULL_RTX, 0, | |
2167 | ptr_mode, 3, | |
2168 | XEXP (object, 0), Pmode, | |
2169 | const0_rtx, | |
2170 | TYPE_MODE (integer_type_node), | |
2171 | convert_to_mode | |
2172 | (TYPE_MODE (sizetype), size, | |
2173 | TREE_UNSIGNED (sizetype)), | |
2174 | TYPE_MODE (sizetype)); | |
bbf6f052 | 2175 | #else |
9de08200 RK |
2176 | emit_library_call (bzero_libfunc, 0, |
2177 | VOIDmode, 2, | |
2178 | XEXP (object, 0), Pmode, | |
e9a25f70 JL |
2179 | convert_to_mode |
2180 | (TYPE_MODE (integer_type_node), size, | |
2181 | TREE_UNSIGNED (integer_type_node)), | |
9de08200 | 2182 | TYPE_MODE (integer_type_node)); |
bbf6f052 | 2183 | #endif |
9de08200 | 2184 | } |
bbf6f052 RK |
2185 | } |
2186 | else | |
66ed0683 | 2187 | emit_move_insn (object, CONST0_RTX (GET_MODE (object))); |
e9a25f70 JL |
2188 | |
2189 | return retval; | |
bbf6f052 RK |
2190 | } |
2191 | ||
2192 | /* Generate code to copy Y into X. | |
2193 | Both Y and X must have the same mode, except that | |
2194 | Y can be a constant with VOIDmode. | |
2195 | This mode cannot be BLKmode; use emit_block_move for that. | |
2196 | ||
2197 | Return the last instruction emitted. */ | |
2198 | ||
2199 | rtx | |
2200 | emit_move_insn (x, y) | |
2201 | rtx x, y; | |
2202 | { | |
2203 | enum machine_mode mode = GET_MODE (x); | |
bbf6f052 RK |
2204 | |
2205 | x = protect_from_queue (x, 1); | |
2206 | y = protect_from_queue (y, 0); | |
2207 | ||
2208 | if (mode == BLKmode || (GET_MODE (y) != mode && GET_MODE (y) != VOIDmode)) | |
2209 | abort (); | |
2210 | ||
2211 | if (CONSTANT_P (y) && ! LEGITIMATE_CONSTANT_P (y)) | |
2212 | y = force_const_mem (mode, y); | |
2213 | ||
2214 | /* If X or Y are memory references, verify that their addresses are valid | |
2215 | for the machine. */ | |
2216 | if (GET_CODE (x) == MEM | |
2217 | && ((! memory_address_p (GET_MODE (x), XEXP (x, 0)) | |
2218 | && ! push_operand (x, GET_MODE (x))) | |
2219 | || (flag_force_addr | |
2220 | && CONSTANT_ADDRESS_P (XEXP (x, 0))))) | |
2221 | x = change_address (x, VOIDmode, XEXP (x, 0)); | |
2222 | ||
2223 | if (GET_CODE (y) == MEM | |
2224 | && (! memory_address_p (GET_MODE (y), XEXP (y, 0)) | |
2225 | || (flag_force_addr | |
2226 | && CONSTANT_ADDRESS_P (XEXP (y, 0))))) | |
2227 | y = change_address (y, VOIDmode, XEXP (y, 0)); | |
2228 | ||
2229 | if (mode == BLKmode) | |
2230 | abort (); | |
2231 | ||
261c4230 RS |
2232 | return emit_move_insn_1 (x, y); |
2233 | } | |
2234 | ||
2235 | /* Low level part of emit_move_insn. | |
2236 | Called just like emit_move_insn, but assumes X and Y | |
2237 | are basically valid. */ | |
2238 | ||
2239 | rtx | |
2240 | emit_move_insn_1 (x, y) | |
2241 | rtx x, y; | |
2242 | { | |
2243 | enum machine_mode mode = GET_MODE (x); | |
2244 | enum machine_mode submode; | |
2245 | enum mode_class class = GET_MODE_CLASS (mode); | |
2246 | int i; | |
2247 | ||
bbf6f052 RK |
2248 | if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing) |
2249 | return | |
2250 | emit_insn (GEN_FCN (mov_optab->handlers[(int) mode].insn_code) (x, y)); | |
2251 | ||
89742723 | 2252 | /* Expand complex moves by moving real part and imag part, if possible. */ |
7308a047 | 2253 | else if ((class == MODE_COMPLEX_FLOAT || class == MODE_COMPLEX_INT) |
d0c76654 RK |
2254 | && BLKmode != (submode = mode_for_size ((GET_MODE_UNIT_SIZE (mode) |
2255 | * BITS_PER_UNIT), | |
2256 | (class == MODE_COMPLEX_INT | |
2257 | ? MODE_INT : MODE_FLOAT), | |
2258 | 0)) | |
7308a047 RS |
2259 | && (mov_optab->handlers[(int) submode].insn_code |
2260 | != CODE_FOR_nothing)) | |
2261 | { | |
2262 | /* Don't split destination if it is a stack push. */ | |
2263 | int stack = push_operand (x, GET_MODE (x)); | |
7308a047 | 2264 | |
7308a047 RS |
2265 | /* If this is a stack, push the highpart first, so it |
2266 | will be in the argument order. | |
2267 | ||
2268 | In that case, change_address is used only to convert | |
2269 | the mode, not to change the address. */ | |
c937357e RS |
2270 | if (stack) |
2271 | { | |
e33c0d66 RS |
2272 | /* Note that the real part always precedes the imag part in memory |
2273 | regardless of machine's endianness. */ | |
c937357e RS |
2274 | #ifdef STACK_GROWS_DOWNWARD |
2275 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) | |
38a448ca | 2276 | (gen_rtx_MEM (submode, (XEXP (x, 0))), |
e33c0d66 | 2277 | gen_imagpart (submode, y))); |
c937357e | 2278 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) |
38a448ca | 2279 | (gen_rtx_MEM (submode, (XEXP (x, 0))), |
e33c0d66 | 2280 | gen_realpart (submode, y))); |
c937357e RS |
2281 | #else |
2282 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) | |
38a448ca | 2283 | (gen_rtx_MEM (submode, (XEXP (x, 0))), |
e33c0d66 | 2284 | gen_realpart (submode, y))); |
c937357e | 2285 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) |
38a448ca | 2286 | (gen_rtx_MEM (submode, (XEXP (x, 0))), |
e33c0d66 | 2287 | gen_imagpart (submode, y))); |
c937357e RS |
2288 | #endif |
2289 | } | |
2290 | else | |
2291 | { | |
2292 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) | |
976ff203 | 2293 | (gen_realpart (submode, x), gen_realpart (submode, y))); |
c937357e | 2294 | emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code) |
976ff203 | 2295 | (gen_imagpart (submode, x), gen_imagpart (submode, y))); |
c937357e | 2296 | } |
7308a047 | 2297 | |
7a1ab50a | 2298 | return get_last_insn (); |
7308a047 RS |
2299 | } |
2300 | ||
bbf6f052 RK |
2301 | /* This will handle any multi-word mode that lacks a move_insn pattern. |
2302 | However, you will get better code if you define such patterns, | |
2303 | even if they must turn into multiple assembler instructions. */ | |
a4320483 | 2304 | else if (GET_MODE_SIZE (mode) > UNITS_PER_WORD) |
bbf6f052 RK |
2305 | { |
2306 | rtx last_insn = 0; | |
6551fa4d | 2307 | |
a98c9f1a RK |
2308 | #ifdef PUSH_ROUNDING |
2309 | ||
2310 | /* If X is a push on the stack, do the push now and replace | |
2311 | X with a reference to the stack pointer. */ | |
2312 | if (push_operand (x, GET_MODE (x))) | |
2313 | { | |
2314 | anti_adjust_stack (GEN_INT (GET_MODE_SIZE (GET_MODE (x)))); | |
2315 | x = change_address (x, VOIDmode, stack_pointer_rtx); | |
2316 | } | |
2317 | #endif | |
2318 | ||
15a7a8ec | 2319 | /* Show the output dies here. */ |
43e046cb | 2320 | if (x != y) |
38a448ca | 2321 | emit_insn (gen_rtx_CLOBBER (VOIDmode, x)); |
15a7a8ec | 2322 | |
bbf6f052 RK |
2323 | for (i = 0; |
2324 | i < (GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD; | |
2325 | i++) | |
2326 | { | |
2327 | rtx xpart = operand_subword (x, i, 1, mode); | |
2328 | rtx ypart = operand_subword (y, i, 1, mode); | |
2329 | ||
2330 | /* If we can't get a part of Y, put Y into memory if it is a | |
2331 | constant. Otherwise, force it into a register. If we still | |
2332 | can't get a part of Y, abort. */ | |
2333 | if (ypart == 0 && CONSTANT_P (y)) | |
2334 | { | |
2335 | y = force_const_mem (mode, y); | |
2336 | ypart = operand_subword (y, i, 1, mode); | |
2337 | } | |
2338 | else if (ypart == 0) | |
2339 | ypart = operand_subword_force (y, i, mode); | |
2340 | ||
2341 | if (xpart == 0 || ypart == 0) | |
2342 | abort (); | |
2343 | ||
2344 | last_insn = emit_move_insn (xpart, ypart); | |
2345 | } | |
6551fa4d | 2346 | |
bbf6f052 RK |
2347 | return last_insn; |
2348 | } | |
2349 | else | |
2350 | abort (); | |
2351 | } | |
2352 | \f | |
2353 | /* Pushing data onto the stack. */ | |
2354 | ||
2355 | /* Push a block of length SIZE (perhaps variable) | |
2356 | and return an rtx to address the beginning of the block. | |
2357 | Note that it is not possible for the value returned to be a QUEUED. | |
2358 | The value may be virtual_outgoing_args_rtx. | |
2359 | ||
2360 | EXTRA is the number of bytes of padding to push in addition to SIZE. | |
2361 | BELOW nonzero means this padding comes at low addresses; | |
2362 | otherwise, the padding comes at high addresses. */ | |
2363 | ||
2364 | rtx | |
2365 | push_block (size, extra, below) | |
2366 | rtx size; | |
2367 | int extra, below; | |
2368 | { | |
2369 | register rtx temp; | |
88f63c77 RK |
2370 | |
2371 | size = convert_modes (Pmode, ptr_mode, size, 1); | |
bbf6f052 RK |
2372 | if (CONSTANT_P (size)) |
2373 | anti_adjust_stack (plus_constant (size, extra)); | |
2374 | else if (GET_CODE (size) == REG && extra == 0) | |
2375 | anti_adjust_stack (size); | |
2376 | else | |
2377 | { | |
2378 | rtx temp = copy_to_mode_reg (Pmode, size); | |
2379 | if (extra != 0) | |
906c4e36 | 2380 | temp = expand_binop (Pmode, add_optab, temp, GEN_INT (extra), |
bbf6f052 RK |
2381 | temp, 0, OPTAB_LIB_WIDEN); |
2382 | anti_adjust_stack (temp); | |
2383 | } | |
2384 | ||
2385 | #ifdef STACK_GROWS_DOWNWARD | |
2386 | temp = virtual_outgoing_args_rtx; | |
2387 | if (extra != 0 && below) | |
2388 | temp = plus_constant (temp, extra); | |
2389 | #else | |
2390 | if (GET_CODE (size) == CONST_INT) | |
2391 | temp = plus_constant (virtual_outgoing_args_rtx, | |
2392 | - INTVAL (size) - (below ? 0 : extra)); | |
2393 | else if (extra != 0 && !below) | |
38a448ca | 2394 | temp = gen_rtx_PLUS (Pmode, virtual_outgoing_args_rtx, |
bbf6f052 RK |
2395 | negate_rtx (Pmode, plus_constant (size, extra))); |
2396 | else | |
38a448ca | 2397 | temp = gen_rtx_PLUS (Pmode, virtual_outgoing_args_rtx, |
bbf6f052 RK |
2398 | negate_rtx (Pmode, size)); |
2399 | #endif | |
2400 | ||
2401 | return memory_address (GET_CLASS_NARROWEST_MODE (MODE_INT), temp); | |
2402 | } | |
2403 | ||
87e38d84 | 2404 | rtx |
bbf6f052 RK |
2405 | gen_push_operand () |
2406 | { | |
38a448ca | 2407 | return gen_rtx_fmt_e (STACK_PUSH_CODE, Pmode, stack_pointer_rtx); |
bbf6f052 RK |
2408 | } |
2409 | ||
921b3427 RK |
2410 | /* Return an rtx for the address of the beginning of a as-if-it-was-pushed |
2411 | block of SIZE bytes. */ | |
2412 | ||
2413 | static rtx | |
2414 | get_push_address (size) | |
2415 | int size; | |
2416 | { | |
2417 | register rtx temp; | |
2418 | ||
2419 | if (STACK_PUSH_CODE == POST_DEC) | |
38a448ca | 2420 | temp = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (size)); |
921b3427 | 2421 | else if (STACK_PUSH_CODE == POST_INC) |
38a448ca | 2422 | temp = gen_rtx_MINUS (Pmode, stack_pointer_rtx, GEN_INT (size)); |
921b3427 RK |
2423 | else |
2424 | temp = stack_pointer_rtx; | |
2425 | ||
c85f7c16 | 2426 | return copy_to_reg (temp); |
921b3427 RK |
2427 | } |
2428 | ||
bbf6f052 RK |
2429 | /* Generate code to push X onto the stack, assuming it has mode MODE and |
2430 | type TYPE. | |
2431 | MODE is redundant except when X is a CONST_INT (since they don't | |
2432 | carry mode info). | |
2433 | SIZE is an rtx for the size of data to be copied (in bytes), | |
2434 | needed only if X is BLKmode. | |
2435 | ||
2436 | ALIGN (in bytes) is maximum alignment we can assume. | |
2437 | ||
cd048831 RK |
2438 | If PARTIAL and REG are both nonzero, then copy that many of the first |
2439 | words of X into registers starting with REG, and push the rest of X. | |
bbf6f052 RK |
2440 | The amount of space pushed is decreased by PARTIAL words, |
2441 | rounded *down* to a multiple of PARM_BOUNDARY. | |
2442 | REG must be a hard register in this case. | |
cd048831 RK |
2443 | If REG is zero but PARTIAL is not, take any all others actions for an |
2444 | argument partially in registers, but do not actually load any | |
2445 | registers. | |
bbf6f052 RK |
2446 | |
2447 | EXTRA is the amount in bytes of extra space to leave next to this arg. | |
6dc42e49 | 2448 | This is ignored if an argument block has already been allocated. |
bbf6f052 RK |
2449 | |
2450 | On a machine that lacks real push insns, ARGS_ADDR is the address of | |
2451 | the bottom of the argument block for this call. We use indexing off there | |
2452 | to store the arg. On machines with push insns, ARGS_ADDR is 0 when a | |
2453 | argument block has not been preallocated. | |
2454 | ||
e5e809f4 JL |
2455 | ARGS_SO_FAR is the size of args previously pushed for this call. |
2456 | ||
2457 | REG_PARM_STACK_SPACE is nonzero if functions require stack space | |
2458 | for arguments passed in registers. If nonzero, it will be the number | |
2459 | of bytes required. */ | |
bbf6f052 RK |
2460 | |
2461 | void | |
2462 | emit_push_insn (x, mode, type, size, align, partial, reg, extra, | |
e5e809f4 | 2463 | args_addr, args_so_far, reg_parm_stack_space) |
bbf6f052 RK |
2464 | register rtx x; |
2465 | enum machine_mode mode; | |
2466 | tree type; | |
2467 | rtx size; | |
2468 | int align; | |
2469 | int partial; | |
2470 | rtx reg; | |
2471 | int extra; | |
2472 | rtx args_addr; | |
2473 | rtx args_so_far; | |
e5e809f4 | 2474 | int reg_parm_stack_space; |
bbf6f052 RK |
2475 | { |
2476 | rtx xinner; | |
2477 | enum direction stack_direction | |
2478 | #ifdef STACK_GROWS_DOWNWARD | |
2479 | = downward; | |
2480 | #else | |
2481 | = upward; | |
2482 | #endif | |
2483 | ||
2484 | /* Decide where to pad the argument: `downward' for below, | |
2485 | `upward' for above, or `none' for don't pad it. | |
2486 | Default is below for small data on big-endian machines; else above. */ | |
2487 | enum direction where_pad = FUNCTION_ARG_PADDING (mode, type); | |
2488 | ||
2489 | /* Invert direction if stack is post-update. */ | |
2490 | if (STACK_PUSH_CODE == POST_INC || STACK_PUSH_CODE == POST_DEC) | |
2491 | if (where_pad != none) | |
2492 | where_pad = (where_pad == downward ? upward : downward); | |
2493 | ||
2494 | xinner = x = protect_from_queue (x, 0); | |
2495 | ||
2496 | if (mode == BLKmode) | |
2497 | { | |
2498 | /* Copy a block into the stack, entirely or partially. */ | |
2499 | ||
2500 | register rtx temp; | |
2501 | int used = partial * UNITS_PER_WORD; | |
2502 | int offset = used % (PARM_BOUNDARY / BITS_PER_UNIT); | |
2503 | int skip; | |
2504 | ||
2505 | if (size == 0) | |
2506 | abort (); | |
2507 | ||
2508 | used -= offset; | |
2509 | ||
2510 | /* USED is now the # of bytes we need not copy to the stack | |
2511 | because registers will take care of them. */ | |
2512 | ||
2513 | if (partial != 0) | |
2514 | xinner = change_address (xinner, BLKmode, | |
2515 | plus_constant (XEXP (xinner, 0), used)); | |
2516 | ||
2517 | /* If the partial register-part of the arg counts in its stack size, | |
2518 | skip the part of stack space corresponding to the registers. | |
2519 | Otherwise, start copying to the beginning of the stack space, | |
2520 | by setting SKIP to 0. */ | |
e5e809f4 | 2521 | skip = (reg_parm_stack_space == 0) ? 0 : used; |
bbf6f052 RK |
2522 | |
2523 | #ifdef PUSH_ROUNDING | |
2524 | /* Do it with several push insns if that doesn't take lots of insns | |
2525 | and if there is no difficulty with push insns that skip bytes | |
2526 | on the stack for alignment purposes. */ | |
2527 | if (args_addr == 0 | |
2528 | && GET_CODE (size) == CONST_INT | |
2529 | && skip == 0 | |
2530 | && (move_by_pieces_ninsns ((unsigned) INTVAL (size) - used, align) | |
2531 | < MOVE_RATIO) | |
bbf6f052 RK |
2532 | /* Here we avoid the case of a structure whose weak alignment |
2533 | forces many pushes of a small amount of data, | |
2534 | and such small pushes do rounding that causes trouble. */ | |
c7a7ac46 | 2535 | && ((! SLOW_UNALIGNED_ACCESS) |
e87b4f3f | 2536 | || align >= BIGGEST_ALIGNMENT / BITS_PER_UNIT |
bbf6f052 | 2537 | || PUSH_ROUNDING (align) == align) |
bbf6f052 RK |
2538 | && PUSH_ROUNDING (INTVAL (size)) == INTVAL (size)) |
2539 | { | |
2540 | /* Push padding now if padding above and stack grows down, | |
2541 | or if padding below and stack grows up. | |
2542 | But if space already allocated, this has already been done. */ | |
2543 | if (extra && args_addr == 0 | |
2544 | && where_pad != none && where_pad != stack_direction) | |
906c4e36 | 2545 | anti_adjust_stack (GEN_INT (extra)); |
bbf6f052 | 2546 | |
38a448ca | 2547 | move_by_pieces (gen_rtx_MEM (BLKmode, gen_push_operand ()), xinner, |
bbf6f052 | 2548 | INTVAL (size) - used, align); |
921b3427 | 2549 | |
956d6950 | 2550 | if (flag_check_memory_usage && ! in_check_memory_usage) |
921b3427 RK |
2551 | { |
2552 | rtx temp; | |
2553 | ||
956d6950 | 2554 | in_check_memory_usage = 1; |
921b3427 | 2555 | temp = get_push_address (INTVAL(size) - used); |
c85f7c16 | 2556 | if (GET_CODE (x) == MEM && type && AGGREGATE_TYPE_P (type)) |
921b3427 RK |
2557 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, |
2558 | temp, ptr_mode, | |
2559 | XEXP (xinner, 0), ptr_mode, | |
2560 | GEN_INT (INTVAL(size) - used), | |
2561 | TYPE_MODE (sizetype)); | |
2562 | else | |
2563 | emit_library_call (chkr_set_right_libfunc, 1, VOIDmode, 3, | |
2564 | temp, ptr_mode, | |
2565 | GEN_INT (INTVAL(size) - used), | |
2566 | TYPE_MODE (sizetype), | |
956d6950 JL |
2567 | GEN_INT (MEMORY_USE_RW), |
2568 | TYPE_MODE (integer_type_node)); | |
2569 | in_check_memory_usage = 0; | |
921b3427 | 2570 | } |
bbf6f052 RK |
2571 | } |
2572 | else | |
2573 | #endif /* PUSH_ROUNDING */ | |
2574 | { | |
2575 | /* Otherwise make space on the stack and copy the data | |
2576 | to the address of that space. */ | |
2577 | ||
2578 | /* Deduct words put into registers from the size we must copy. */ | |
2579 | if (partial != 0) | |
2580 | { | |
2581 | if (GET_CODE (size) == CONST_INT) | |
906c4e36 | 2582 | size = GEN_INT (INTVAL (size) - used); |
bbf6f052 RK |
2583 | else |
2584 | size = expand_binop (GET_MODE (size), sub_optab, size, | |
906c4e36 RK |
2585 | GEN_INT (used), NULL_RTX, 0, |
2586 | OPTAB_LIB_WIDEN); | |
bbf6f052 RK |
2587 | } |
2588 | ||
2589 | /* Get the address of the stack space. | |
2590 | In this case, we do not deal with EXTRA separately. | |
2591 | A single stack adjust will do. */ | |
2592 | if (! args_addr) | |
2593 | { | |
2594 | temp = push_block (size, extra, where_pad == downward); | |
2595 | extra = 0; | |
2596 | } | |
2597 | else if (GET_CODE (args_so_far) == CONST_INT) | |
2598 | temp = memory_address (BLKmode, | |
2599 | plus_constant (args_addr, | |
2600 | skip + INTVAL (args_so_far))); | |
2601 | else | |
2602 | temp = memory_address (BLKmode, | |
38a448ca RH |
2603 | plus_constant (gen_rtx_PLUS (Pmode, |
2604 | args_addr, | |
2605 | args_so_far), | |
bbf6f052 | 2606 | skip)); |
956d6950 | 2607 | if (flag_check_memory_usage && ! in_check_memory_usage) |
921b3427 RK |
2608 | { |
2609 | rtx target; | |
2610 | ||
956d6950 | 2611 | in_check_memory_usage = 1; |
921b3427 | 2612 | target = copy_to_reg (temp); |
c85f7c16 | 2613 | if (GET_CODE (x) == MEM && type && AGGREGATE_TYPE_P (type)) |
921b3427 RK |
2614 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, |
2615 | target, ptr_mode, | |
2616 | XEXP (xinner, 0), ptr_mode, | |
2617 | size, TYPE_MODE (sizetype)); | |
2618 | else | |
2619 | emit_library_call (chkr_set_right_libfunc, 1, VOIDmode, 3, | |
2620 | target, ptr_mode, | |
2621 | size, TYPE_MODE (sizetype), | |
956d6950 JL |
2622 | GEN_INT (MEMORY_USE_RW), |
2623 | TYPE_MODE (integer_type_node)); | |
2624 | in_check_memory_usage = 0; | |
921b3427 | 2625 | } |
bbf6f052 RK |
2626 | |
2627 | /* TEMP is the address of the block. Copy the data there. */ | |
2628 | if (GET_CODE (size) == CONST_INT | |
2629 | && (move_by_pieces_ninsns ((unsigned) INTVAL (size), align) | |
2630 | < MOVE_RATIO)) | |
2631 | { | |
38a448ca | 2632 | move_by_pieces (gen_rtx_MEM (BLKmode, temp), xinner, |
bbf6f052 RK |
2633 | INTVAL (size), align); |
2634 | goto ret; | |
2635 | } | |
e5e809f4 | 2636 | else |
bbf6f052 | 2637 | { |
e5e809f4 JL |
2638 | rtx opalign = GEN_INT (align); |
2639 | enum machine_mode mode; | |
2640 | rtx target = gen_rtx (MEM, BLKmode, temp); | |
2641 | ||
2642 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); | |
2643 | mode != VOIDmode; | |
2644 | mode = GET_MODE_WIDER_MODE (mode)) | |
c841050e | 2645 | { |
e5e809f4 JL |
2646 | enum insn_code code = movstr_optab[(int) mode]; |
2647 | ||
2648 | if (code != CODE_FOR_nothing | |
2649 | && ((GET_CODE (size) == CONST_INT | |
2650 | && ((unsigned HOST_WIDE_INT) INTVAL (size) | |
2651 | <= (GET_MODE_MASK (mode) >> 1))) | |
2652 | || GET_MODE_BITSIZE (mode) >= BITS_PER_WORD) | |
2653 | && (insn_operand_predicate[(int) code][0] == 0 | |
2654 | || ((*insn_operand_predicate[(int) code][0]) | |
2655 | (target, BLKmode))) | |
2656 | && (insn_operand_predicate[(int) code][1] == 0 | |
2657 | || ((*insn_operand_predicate[(int) code][1]) | |
2658 | (xinner, BLKmode))) | |
2659 | && (insn_operand_predicate[(int) code][3] == 0 | |
2660 | || ((*insn_operand_predicate[(int) code][3]) | |
2661 | (opalign, VOIDmode)))) | |
2662 | { | |
2663 | rtx op2 = convert_to_mode (mode, size, 1); | |
2664 | rtx last = get_last_insn (); | |
2665 | rtx pat; | |
2666 | ||
2667 | if (insn_operand_predicate[(int) code][2] != 0 | |
2668 | && ! ((*insn_operand_predicate[(int) code][2]) | |
2669 | (op2, mode))) | |
2670 | op2 = copy_to_mode_reg (mode, op2); | |
2671 | ||
2672 | pat = GEN_FCN ((int) code) (target, xinner, | |
2673 | op2, opalign); | |
2674 | if (pat) | |
2675 | { | |
2676 | emit_insn (pat); | |
2677 | goto ret; | |
2678 | } | |
2679 | else | |
2680 | delete_insns_since (last); | |
2681 | } | |
c841050e | 2682 | } |
bbf6f052 | 2683 | } |
bbf6f052 RK |
2684 | |
2685 | #ifndef ACCUMULATE_OUTGOING_ARGS | |
2686 | /* If the source is referenced relative to the stack pointer, | |
2687 | copy it to another register to stabilize it. We do not need | |
2688 | to do this if we know that we won't be changing sp. */ | |
2689 | ||
2690 | if (reg_mentioned_p (virtual_stack_dynamic_rtx, temp) | |
2691 | || reg_mentioned_p (virtual_outgoing_args_rtx, temp)) | |
2692 | temp = copy_to_reg (temp); | |
2693 | #endif | |
2694 | ||
2695 | /* Make inhibit_defer_pop nonzero around the library call | |
2696 | to force it to pop the bcopy-arguments right away. */ | |
2697 | NO_DEFER_POP; | |
2698 | #ifdef TARGET_MEM_FUNCTIONS | |
d562e42e | 2699 | emit_library_call (memcpy_libfunc, 0, |
bbf6f052 | 2700 | VOIDmode, 3, temp, Pmode, XEXP (xinner, 0), Pmode, |
0fa83258 RK |
2701 | convert_to_mode (TYPE_MODE (sizetype), |
2702 | size, TREE_UNSIGNED (sizetype)), | |
26ba80fc | 2703 | TYPE_MODE (sizetype)); |
bbf6f052 | 2704 | #else |
d562e42e | 2705 | emit_library_call (bcopy_libfunc, 0, |
bbf6f052 | 2706 | VOIDmode, 3, XEXP (xinner, 0), Pmode, temp, Pmode, |
3b6f75e2 JW |
2707 | convert_to_mode (TYPE_MODE (integer_type_node), |
2708 | size, | |
2709 | TREE_UNSIGNED (integer_type_node)), | |
2710 | TYPE_MODE (integer_type_node)); | |
bbf6f052 RK |
2711 | #endif |
2712 | OK_DEFER_POP; | |
2713 | } | |
2714 | } | |
2715 | else if (partial > 0) | |
2716 | { | |
2717 | /* Scalar partly in registers. */ | |
2718 | ||
2719 | int size = GET_MODE_SIZE (mode) / UNITS_PER_WORD; | |
2720 | int i; | |
2721 | int not_stack; | |
2722 | /* # words of start of argument | |
2723 | that we must make space for but need not store. */ | |
2724 | int offset = partial % (PARM_BOUNDARY / BITS_PER_WORD); | |
2725 | int args_offset = INTVAL (args_so_far); | |
2726 | int skip; | |
2727 | ||
2728 | /* Push padding now if padding above and stack grows down, | |
2729 | or if padding below and stack grows up. | |
2730 | But if space already allocated, this has already been done. */ | |
2731 | if (extra && args_addr == 0 | |
2732 | && where_pad != none && where_pad != stack_direction) | |
906c4e36 | 2733 | anti_adjust_stack (GEN_INT (extra)); |
bbf6f052 RK |
2734 | |
2735 | /* If we make space by pushing it, we might as well push | |
2736 | the real data. Otherwise, we can leave OFFSET nonzero | |
2737 | and leave the space uninitialized. */ | |
2738 | if (args_addr == 0) | |
2739 | offset = 0; | |
2740 | ||
2741 | /* Now NOT_STACK gets the number of words that we don't need to | |
2742 | allocate on the stack. */ | |
2743 | not_stack = partial - offset; | |
2744 | ||
2745 | /* If the partial register-part of the arg counts in its stack size, | |
2746 | skip the part of stack space corresponding to the registers. | |
2747 | Otherwise, start copying to the beginning of the stack space, | |
2748 | by setting SKIP to 0. */ | |
e5e809f4 | 2749 | skip = (reg_parm_stack_space == 0) ? 0 : not_stack; |
bbf6f052 RK |
2750 | |
2751 | if (CONSTANT_P (x) && ! LEGITIMATE_CONSTANT_P (x)) | |
2752 | x = validize_mem (force_const_mem (mode, x)); | |
2753 | ||
2754 | /* If X is a hard register in a non-integer mode, copy it into a pseudo; | |
2755 | SUBREGs of such registers are not allowed. */ | |
2756 | if ((GET_CODE (x) == REG && REGNO (x) < FIRST_PSEUDO_REGISTER | |
2757 | && GET_MODE_CLASS (GET_MODE (x)) != MODE_INT)) | |
2758 | x = copy_to_reg (x); | |
2759 | ||
2760 | /* Loop over all the words allocated on the stack for this arg. */ | |
2761 | /* We can do it by words, because any scalar bigger than a word | |
2762 | has a size a multiple of a word. */ | |
2763 | #ifndef PUSH_ARGS_REVERSED | |
2764 | for (i = not_stack; i < size; i++) | |
2765 | #else | |
2766 | for (i = size - 1; i >= not_stack; i--) | |
2767 | #endif | |
2768 | if (i >= not_stack + offset) | |
2769 | emit_push_insn (operand_subword_force (x, i, mode), | |
906c4e36 RK |
2770 | word_mode, NULL_TREE, NULL_RTX, align, 0, NULL_RTX, |
2771 | 0, args_addr, | |
2772 | GEN_INT (args_offset + ((i - not_stack + skip) | |
e5e809f4 JL |
2773 | * UNITS_PER_WORD)), |
2774 | reg_parm_stack_space); | |
bbf6f052 RK |
2775 | } |
2776 | else | |
2777 | { | |
2778 | rtx addr; | |
921b3427 | 2779 | rtx target = NULL_RTX; |
bbf6f052 RK |
2780 | |
2781 | /* Push padding now if padding above and stack grows down, | |
2782 | or if padding below and stack grows up. | |
2783 | But if space already allocated, this has already been done. */ | |
2784 | if (extra && args_addr == 0 | |
2785 | && where_pad != none && where_pad != stack_direction) | |
906c4e36 | 2786 | anti_adjust_stack (GEN_INT (extra)); |
bbf6f052 RK |
2787 | |
2788 | #ifdef PUSH_ROUNDING | |
2789 | if (args_addr == 0) | |
2790 | addr = gen_push_operand (); | |
2791 | else | |
2792 | #endif | |
921b3427 RK |
2793 | { |
2794 | if (GET_CODE (args_so_far) == CONST_INT) | |
2795 | addr | |
2796 | = memory_address (mode, | |
2797 | plus_constant (args_addr, | |
2798 | INTVAL (args_so_far))); | |
2799 | else | |
38a448ca RH |
2800 | addr = memory_address (mode, gen_rtx_PLUS (Pmode, args_addr, |
2801 | args_so_far)); | |
921b3427 RK |
2802 | target = addr; |
2803 | } | |
bbf6f052 | 2804 | |
38a448ca | 2805 | emit_move_insn (gen_rtx_MEM (mode, addr), x); |
921b3427 | 2806 | |
956d6950 | 2807 | if (flag_check_memory_usage && ! in_check_memory_usage) |
921b3427 | 2808 | { |
956d6950 | 2809 | in_check_memory_usage = 1; |
921b3427 RK |
2810 | if (target == 0) |
2811 | target = get_push_address (GET_MODE_SIZE (mode)); | |
2812 | ||
c85f7c16 | 2813 | if (GET_CODE (x) == MEM && type && AGGREGATE_TYPE_P (type)) |
921b3427 RK |
2814 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, |
2815 | target, ptr_mode, | |
2816 | XEXP (x, 0), ptr_mode, | |
2817 | GEN_INT (GET_MODE_SIZE (mode)), | |
2818 | TYPE_MODE (sizetype)); | |
2819 | else | |
2820 | emit_library_call (chkr_set_right_libfunc, 1, VOIDmode, 3, | |
2821 | target, ptr_mode, | |
2822 | GEN_INT (GET_MODE_SIZE (mode)), | |
2823 | TYPE_MODE (sizetype), | |
956d6950 JL |
2824 | GEN_INT (MEMORY_USE_RW), |
2825 | TYPE_MODE (integer_type_node)); | |
2826 | in_check_memory_usage = 0; | |
921b3427 | 2827 | } |
bbf6f052 RK |
2828 | } |
2829 | ||
2830 | ret: | |
2831 | /* If part should go in registers, copy that part | |
2832 | into the appropriate registers. Do this now, at the end, | |
2833 | since mem-to-mem copies above may do function calls. */ | |
cd048831 | 2834 | if (partial > 0 && reg != 0) |
fffa9c1d JW |
2835 | { |
2836 | /* Handle calls that pass values in multiple non-contiguous locations. | |
2837 | The Irix 6 ABI has examples of this. */ | |
2838 | if (GET_CODE (reg) == PARALLEL) | |
2839 | emit_group_load (reg, x); | |
2840 | else | |
2841 | move_block_to_reg (REGNO (reg), x, partial, mode); | |
2842 | } | |
bbf6f052 RK |
2843 | |
2844 | if (extra && args_addr == 0 && where_pad == stack_direction) | |
906c4e36 | 2845 | anti_adjust_stack (GEN_INT (extra)); |
bbf6f052 RK |
2846 | } |
2847 | \f | |
bbf6f052 RK |
2848 | /* Expand an assignment that stores the value of FROM into TO. |
2849 | If WANT_VALUE is nonzero, return an rtx for the value of TO. | |
709f5be1 RS |
2850 | (This may contain a QUEUED rtx; |
2851 | if the value is constant, this rtx is a constant.) | |
2852 | Otherwise, the returned value is NULL_RTX. | |
bbf6f052 RK |
2853 | |
2854 | SUGGEST_REG is no longer actually used. | |
2855 | It used to mean, copy the value through a register | |
2856 | and return that register, if that is possible. | |
709f5be1 | 2857 | We now use WANT_VALUE to decide whether to do this. */ |
bbf6f052 RK |
2858 | |
2859 | rtx | |
2860 | expand_assignment (to, from, want_value, suggest_reg) | |
2861 | tree to, from; | |
2862 | int want_value; | |
2863 | int suggest_reg; | |
2864 | { | |
2865 | register rtx to_rtx = 0; | |
2866 | rtx result; | |
2867 | ||
2868 | /* Don't crash if the lhs of the assignment was erroneous. */ | |
2869 | ||
2870 | if (TREE_CODE (to) == ERROR_MARK) | |
709f5be1 RS |
2871 | { |
2872 | result = expand_expr (from, NULL_RTX, VOIDmode, 0); | |
2873 | return want_value ? result : NULL_RTX; | |
2874 | } | |
bbf6f052 RK |
2875 | |
2876 | /* Assignment of a structure component needs special treatment | |
2877 | if the structure component's rtx is not simply a MEM. | |
6be58303 JW |
2878 | Assignment of an array element at a constant index, and assignment of |
2879 | an array element in an unaligned packed structure field, has the same | |
2880 | problem. */ | |
bbf6f052 | 2881 | |
08293add RK |
2882 | if (TREE_CODE (to) == COMPONENT_REF || TREE_CODE (to) == BIT_FIELD_REF |
2883 | || TREE_CODE (to) == ARRAY_REF) | |
bbf6f052 RK |
2884 | { |
2885 | enum machine_mode mode1; | |
2886 | int bitsize; | |
2887 | int bitpos; | |
7bb0943f | 2888 | tree offset; |
bbf6f052 RK |
2889 | int unsignedp; |
2890 | int volatilep = 0; | |
0088fcb1 | 2891 | tree tem; |
d78d243c | 2892 | int alignment; |
0088fcb1 RK |
2893 | |
2894 | push_temp_slots (); | |
839c4796 RK |
2895 | tem = get_inner_reference (to, &bitsize, &bitpos, &offset, &mode1, |
2896 | &unsignedp, &volatilep, &alignment); | |
bbf6f052 RK |
2897 | |
2898 | /* If we are going to use store_bit_field and extract_bit_field, | |
2899 | make sure to_rtx will be safe for multiple use. */ | |
2900 | ||
2901 | if (mode1 == VOIDmode && want_value) | |
2902 | tem = stabilize_reference (tem); | |
2903 | ||
921b3427 | 2904 | to_rtx = expand_expr (tem, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_DONT); |
7bb0943f RS |
2905 | if (offset != 0) |
2906 | { | |
906c4e36 | 2907 | rtx offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, 0); |
7bb0943f RS |
2908 | |
2909 | if (GET_CODE (to_rtx) != MEM) | |
2910 | abort (); | |
2911 | to_rtx = change_address (to_rtx, VOIDmode, | |
38a448ca RH |
2912 | gen_rtx_PLUS (ptr_mode, XEXP (to_rtx, 0), |
2913 | force_reg (ptr_mode, offset_rtx))); | |
7bb0943f | 2914 | } |
bbf6f052 RK |
2915 | if (volatilep) |
2916 | { | |
2917 | if (GET_CODE (to_rtx) == MEM) | |
01188446 JW |
2918 | { |
2919 | /* When the offset is zero, to_rtx is the address of the | |
2920 | structure we are storing into, and hence may be shared. | |
2921 | We must make a new MEM before setting the volatile bit. */ | |
2922 | if (offset == 0) | |
effbcc6a RK |
2923 | to_rtx = copy_rtx (to_rtx); |
2924 | ||
01188446 JW |
2925 | MEM_VOLATILE_P (to_rtx) = 1; |
2926 | } | |
bbf6f052 RK |
2927 | #if 0 /* This was turned off because, when a field is volatile |
2928 | in an object which is not volatile, the object may be in a register, | |
2929 | and then we would abort over here. */ | |
2930 | else | |
2931 | abort (); | |
2932 | #endif | |
2933 | } | |
2934 | ||
956d6950 JL |
2935 | if (TREE_CODE (to) == COMPONENT_REF |
2936 | && TREE_READONLY (TREE_OPERAND (to, 1))) | |
2937 | { | |
8bd6ecc2 | 2938 | if (offset == 0) |
956d6950 JL |
2939 | to_rtx = copy_rtx (to_rtx); |
2940 | ||
2941 | RTX_UNCHANGING_P (to_rtx) = 1; | |
2942 | } | |
2943 | ||
921b3427 RK |
2944 | /* Check the access. */ |
2945 | if (flag_check_memory_usage && GET_CODE (to_rtx) == MEM) | |
2946 | { | |
2947 | rtx to_addr; | |
2948 | int size; | |
2949 | int best_mode_size; | |
2950 | enum machine_mode best_mode; | |
2951 | ||
2952 | best_mode = get_best_mode (bitsize, bitpos, | |
2953 | TYPE_ALIGN (TREE_TYPE (tem)), | |
2954 | mode1, volatilep); | |
2955 | if (best_mode == VOIDmode) | |
2956 | best_mode = QImode; | |
2957 | ||
2958 | best_mode_size = GET_MODE_BITSIZE (best_mode); | |
2959 | to_addr = plus_constant (XEXP (to_rtx, 0), (bitpos / BITS_PER_UNIT)); | |
2960 | size = CEIL ((bitpos % best_mode_size) + bitsize, best_mode_size); | |
2961 | size *= GET_MODE_SIZE (best_mode); | |
2962 | ||
2963 | /* Check the access right of the pointer. */ | |
e9a25f70 JL |
2964 | if (size) |
2965 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
2966 | to_addr, ptr_mode, | |
2967 | GEN_INT (size), TYPE_MODE (sizetype), | |
956d6950 JL |
2968 | GEN_INT (MEMORY_USE_WO), |
2969 | TYPE_MODE (integer_type_node)); | |
921b3427 RK |
2970 | } |
2971 | ||
bbf6f052 RK |
2972 | result = store_field (to_rtx, bitsize, bitpos, mode1, from, |
2973 | (want_value | |
2974 | /* Spurious cast makes HPUX compiler happy. */ | |
2975 | ? (enum machine_mode) TYPE_MODE (TREE_TYPE (to)) | |
2976 | : VOIDmode), | |
2977 | unsignedp, | |
2978 | /* Required alignment of containing datum. */ | |
d78d243c | 2979 | alignment, |
bbf6f052 RK |
2980 | int_size_in_bytes (TREE_TYPE (tem))); |
2981 | preserve_temp_slots (result); | |
2982 | free_temp_slots (); | |
0088fcb1 | 2983 | pop_temp_slots (); |
bbf6f052 | 2984 | |
709f5be1 RS |
2985 | /* If the value is meaningful, convert RESULT to the proper mode. |
2986 | Otherwise, return nothing. */ | |
5ffe63ed RS |
2987 | return (want_value ? convert_modes (TYPE_MODE (TREE_TYPE (to)), |
2988 | TYPE_MODE (TREE_TYPE (from)), | |
2989 | result, | |
2990 | TREE_UNSIGNED (TREE_TYPE (to))) | |
709f5be1 | 2991 | : NULL_RTX); |
bbf6f052 RK |
2992 | } |
2993 | ||
cd1db108 RS |
2994 | /* If the rhs is a function call and its value is not an aggregate, |
2995 | call the function before we start to compute the lhs. | |
2996 | This is needed for correct code for cases such as | |
2997 | val = setjmp (buf) on machines where reference to val | |
1ad87b63 RK |
2998 | requires loading up part of an address in a separate insn. |
2999 | ||
3000 | Don't do this if TO is a VAR_DECL whose DECL_RTL is REG since it might be | |
3001 | a promoted variable where the zero- or sign- extension needs to be done. | |
3002 | Handling this in the normal way is safe because no computation is done | |
3003 | before the call. */ | |
3004 | if (TREE_CODE (from) == CALL_EXPR && ! aggregate_value_p (from) | |
b35cd3c1 | 3005 | && TREE_CODE (TYPE_SIZE (TREE_TYPE (from))) == INTEGER_CST |
1ad87b63 | 3006 | && ! (TREE_CODE (to) == VAR_DECL && GET_CODE (DECL_RTL (to)) == REG)) |
cd1db108 | 3007 | { |
0088fcb1 RK |
3008 | rtx value; |
3009 | ||
3010 | push_temp_slots (); | |
3011 | value = expand_expr (from, NULL_RTX, VOIDmode, 0); | |
cd1db108 | 3012 | if (to_rtx == 0) |
921b3427 | 3013 | to_rtx = expand_expr (to, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_WO); |
aaf87c45 | 3014 | |
fffa9c1d JW |
3015 | /* Handle calls that return values in multiple non-contiguous locations. |
3016 | The Irix 6 ABI has examples of this. */ | |
3017 | if (GET_CODE (to_rtx) == PARALLEL) | |
3018 | emit_group_load (to_rtx, value); | |
3019 | else if (GET_MODE (to_rtx) == BLKmode) | |
db3ec607 | 3020 | emit_block_move (to_rtx, value, expr_size (from), |
ff9b5bd8 | 3021 | TYPE_ALIGN (TREE_TYPE (from)) / BITS_PER_UNIT); |
aaf87c45 JL |
3022 | else |
3023 | emit_move_insn (to_rtx, value); | |
cd1db108 RS |
3024 | preserve_temp_slots (to_rtx); |
3025 | free_temp_slots (); | |
0088fcb1 | 3026 | pop_temp_slots (); |
709f5be1 | 3027 | return want_value ? to_rtx : NULL_RTX; |
cd1db108 RS |
3028 | } |
3029 | ||
bbf6f052 RK |
3030 | /* Ordinary treatment. Expand TO to get a REG or MEM rtx. |
3031 | Don't re-expand if it was expanded already (in COMPONENT_REF case). */ | |
3032 | ||
3033 | if (to_rtx == 0) | |
921b3427 | 3034 | to_rtx = expand_expr (to, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_WO); |
bbf6f052 | 3035 | |
86d38d25 RS |
3036 | /* Don't move directly into a return register. */ |
3037 | if (TREE_CODE (to) == RESULT_DECL && GET_CODE (to_rtx) == REG) | |
3038 | { | |
0088fcb1 RK |
3039 | rtx temp; |
3040 | ||
3041 | push_temp_slots (); | |
3042 | temp = expand_expr (from, 0, GET_MODE (to_rtx), 0); | |
86d38d25 RS |
3043 | emit_move_insn (to_rtx, temp); |
3044 | preserve_temp_slots (to_rtx); | |
3045 | free_temp_slots (); | |
0088fcb1 | 3046 | pop_temp_slots (); |
709f5be1 | 3047 | return want_value ? to_rtx : NULL_RTX; |
86d38d25 RS |
3048 | } |
3049 | ||
bbf6f052 RK |
3050 | /* In case we are returning the contents of an object which overlaps |
3051 | the place the value is being stored, use a safe function when copying | |
3052 | a value through a pointer into a structure value return block. */ | |
3053 | if (TREE_CODE (to) == RESULT_DECL && TREE_CODE (from) == INDIRECT_REF | |
3054 | && current_function_returns_struct | |
3055 | && !current_function_returns_pcc_struct) | |
3056 | { | |
0088fcb1 RK |
3057 | rtx from_rtx, size; |
3058 | ||
3059 | push_temp_slots (); | |
33a20d10 | 3060 | size = expr_size (from); |
921b3427 RK |
3061 | from_rtx = expand_expr (from, NULL_RTX, VOIDmode, |
3062 | EXPAND_MEMORY_USE_DONT); | |
3063 | ||
3064 | /* Copy the rights of the bitmap. */ | |
3065 | if (flag_check_memory_usage) | |
3066 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, | |
3067 | XEXP (to_rtx, 0), ptr_mode, | |
3068 | XEXP (from_rtx, 0), ptr_mode, | |
3069 | convert_to_mode (TYPE_MODE (sizetype), | |
3070 | size, TREE_UNSIGNED (sizetype)), | |
3071 | TYPE_MODE (sizetype)); | |
bbf6f052 RK |
3072 | |
3073 | #ifdef TARGET_MEM_FUNCTIONS | |
d562e42e | 3074 | emit_library_call (memcpy_libfunc, 0, |
bbf6f052 RK |
3075 | VOIDmode, 3, XEXP (to_rtx, 0), Pmode, |
3076 | XEXP (from_rtx, 0), Pmode, | |
0fa83258 RK |
3077 | convert_to_mode (TYPE_MODE (sizetype), |
3078 | size, TREE_UNSIGNED (sizetype)), | |
26ba80fc | 3079 | TYPE_MODE (sizetype)); |
bbf6f052 | 3080 | #else |
d562e42e | 3081 | emit_library_call (bcopy_libfunc, 0, |
bbf6f052 RK |
3082 | VOIDmode, 3, XEXP (from_rtx, 0), Pmode, |
3083 | XEXP (to_rtx, 0), Pmode, | |
3b6f75e2 JW |
3084 | convert_to_mode (TYPE_MODE (integer_type_node), |
3085 | size, TREE_UNSIGNED (integer_type_node)), | |
3086 | TYPE_MODE (integer_type_node)); | |
bbf6f052 RK |
3087 | #endif |
3088 | ||
3089 | preserve_temp_slots (to_rtx); | |
3090 | free_temp_slots (); | |
0088fcb1 | 3091 | pop_temp_slots (); |
709f5be1 | 3092 | return want_value ? to_rtx : NULL_RTX; |
bbf6f052 RK |
3093 | } |
3094 | ||
3095 | /* Compute FROM and store the value in the rtx we got. */ | |
3096 | ||
0088fcb1 | 3097 | push_temp_slots (); |
bbf6f052 RK |
3098 | result = store_expr (from, to_rtx, want_value); |
3099 | preserve_temp_slots (result); | |
3100 | free_temp_slots (); | |
0088fcb1 | 3101 | pop_temp_slots (); |
709f5be1 | 3102 | return want_value ? result : NULL_RTX; |
bbf6f052 RK |
3103 | } |
3104 | ||
3105 | /* Generate code for computing expression EXP, | |
3106 | and storing the value into TARGET. | |
bbf6f052 RK |
3107 | TARGET may contain a QUEUED rtx. |
3108 | ||
709f5be1 RS |
3109 | If WANT_VALUE is nonzero, return a copy of the value |
3110 | not in TARGET, so that we can be sure to use the proper | |
3111 | value in a containing expression even if TARGET has something | |
3112 | else stored in it. If possible, we copy the value through a pseudo | |
3113 | and return that pseudo. Or, if the value is constant, we try to | |
3114 | return the constant. In some cases, we return a pseudo | |
3115 | copied *from* TARGET. | |
3116 | ||
3117 | If the mode is BLKmode then we may return TARGET itself. | |
3118 | It turns out that in BLKmode it doesn't cause a problem. | |
3119 | because C has no operators that could combine two different | |
3120 | assignments into the same BLKmode object with different values | |
3121 | with no sequence point. Will other languages need this to | |
3122 | be more thorough? | |
3123 | ||
3124 | If WANT_VALUE is 0, we return NULL, to make sure | |
3125 | to catch quickly any cases where the caller uses the value | |
3126 | and fails to set WANT_VALUE. */ | |
bbf6f052 RK |
3127 | |
3128 | rtx | |
709f5be1 | 3129 | store_expr (exp, target, want_value) |
bbf6f052 RK |
3130 | register tree exp; |
3131 | register rtx target; | |
709f5be1 | 3132 | int want_value; |
bbf6f052 RK |
3133 | { |
3134 | register rtx temp; | |
3135 | int dont_return_target = 0; | |
3136 | ||
3137 | if (TREE_CODE (exp) == COMPOUND_EXPR) | |
3138 | { | |
3139 | /* Perform first part of compound expression, then assign from second | |
3140 | part. */ | |
3141 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, 0); | |
3142 | emit_queue (); | |
709f5be1 | 3143 | return store_expr (TREE_OPERAND (exp, 1), target, want_value); |
bbf6f052 RK |
3144 | } |
3145 | else if (TREE_CODE (exp) == COND_EXPR && GET_MODE (target) == BLKmode) | |
3146 | { | |
3147 | /* For conditional expression, get safe form of the target. Then | |
3148 | test the condition, doing the appropriate assignment on either | |
3149 | side. This avoids the creation of unnecessary temporaries. | |
3150 | For non-BLKmode, it is more efficient not to do this. */ | |
3151 | ||
3152 | rtx lab1 = gen_label_rtx (), lab2 = gen_label_rtx (); | |
3153 | ||
3154 | emit_queue (); | |
3155 | target = protect_from_queue (target, 1); | |
3156 | ||
dabf8373 | 3157 | do_pending_stack_adjust (); |
bbf6f052 RK |
3158 | NO_DEFER_POP; |
3159 | jumpifnot (TREE_OPERAND (exp, 0), lab1); | |
956d6950 | 3160 | start_cleanup_deferral (); |
709f5be1 | 3161 | store_expr (TREE_OPERAND (exp, 1), target, 0); |
956d6950 | 3162 | end_cleanup_deferral (); |
bbf6f052 RK |
3163 | emit_queue (); |
3164 | emit_jump_insn (gen_jump (lab2)); | |
3165 | emit_barrier (); | |
3166 | emit_label (lab1); | |
956d6950 | 3167 | start_cleanup_deferral (); |
709f5be1 | 3168 | store_expr (TREE_OPERAND (exp, 2), target, 0); |
956d6950 | 3169 | end_cleanup_deferral (); |
bbf6f052 RK |
3170 | emit_queue (); |
3171 | emit_label (lab2); | |
3172 | OK_DEFER_POP; | |
a3a58acc | 3173 | |
709f5be1 | 3174 | return want_value ? target : NULL_RTX; |
bbf6f052 | 3175 | } |
709f5be1 | 3176 | else if (want_value && GET_CODE (target) == MEM && ! MEM_VOLATILE_P (target) |
bbf6f052 RK |
3177 | && GET_MODE (target) != BLKmode) |
3178 | /* If target is in memory and caller wants value in a register instead, | |
3179 | arrange that. Pass TARGET as target for expand_expr so that, | |
709f5be1 | 3180 | if EXP is another assignment, WANT_VALUE will be nonzero for it. |
c2e6aff6 RS |
3181 | We know expand_expr will not use the target in that case. |
3182 | Don't do this if TARGET is volatile because we are supposed | |
3183 | to write it and then read it. */ | |
bbf6f052 | 3184 | { |
906c4e36 | 3185 | temp = expand_expr (exp, cse_not_expected ? NULL_RTX : target, |
bbf6f052 RK |
3186 | GET_MODE (target), 0); |
3187 | if (GET_MODE (temp) != BLKmode && GET_MODE (temp) != VOIDmode) | |
3188 | temp = copy_to_reg (temp); | |
3189 | dont_return_target = 1; | |
3190 | } | |
3191 | else if (queued_subexp_p (target)) | |
709f5be1 RS |
3192 | /* If target contains a postincrement, let's not risk |
3193 | using it as the place to generate the rhs. */ | |
bbf6f052 RK |
3194 | { |
3195 | if (GET_MODE (target) != BLKmode && GET_MODE (target) != VOIDmode) | |
3196 | { | |
3197 | /* Expand EXP into a new pseudo. */ | |
3198 | temp = gen_reg_rtx (GET_MODE (target)); | |
3199 | temp = expand_expr (exp, temp, GET_MODE (target), 0); | |
3200 | } | |
3201 | else | |
906c4e36 | 3202 | temp = expand_expr (exp, NULL_RTX, GET_MODE (target), 0); |
709f5be1 RS |
3203 | |
3204 | /* If target is volatile, ANSI requires accessing the value | |
3205 | *from* the target, if it is accessed. So make that happen. | |
3206 | In no case return the target itself. */ | |
3207 | if (! MEM_VOLATILE_P (target) && want_value) | |
3208 | dont_return_target = 1; | |
bbf6f052 | 3209 | } |
1499e0a8 RK |
3210 | else if (GET_CODE (target) == SUBREG && SUBREG_PROMOTED_VAR_P (target)) |
3211 | /* If this is an scalar in a register that is stored in a wider mode | |
3212 | than the declared mode, compute the result into its declared mode | |
3213 | and then convert to the wider mode. Our value is the computed | |
3214 | expression. */ | |
3215 | { | |
5a32d038 | 3216 | /* If we don't want a value, we can do the conversion inside EXP, |
f635a84d RK |
3217 | which will often result in some optimizations. Do the conversion |
3218 | in two steps: first change the signedness, if needed, then | |
ab6c58f1 RK |
3219 | the extend. But don't do this if the type of EXP is a subtype |
3220 | of something else since then the conversion might involve | |
3221 | more than just converting modes. */ | |
3222 | if (! want_value && INTEGRAL_TYPE_P (TREE_TYPE (exp)) | |
3223 | && TREE_TYPE (TREE_TYPE (exp)) == 0) | |
f635a84d RK |
3224 | { |
3225 | if (TREE_UNSIGNED (TREE_TYPE (exp)) | |
3226 | != SUBREG_PROMOTED_UNSIGNED_P (target)) | |
3227 | exp | |
3228 | = convert | |
3229 | (signed_or_unsigned_type (SUBREG_PROMOTED_UNSIGNED_P (target), | |
3230 | TREE_TYPE (exp)), | |
3231 | exp); | |
3232 | ||
3233 | exp = convert (type_for_mode (GET_MODE (SUBREG_REG (target)), | |
3234 | SUBREG_PROMOTED_UNSIGNED_P (target)), | |
3235 | exp); | |
3236 | } | |
5a32d038 | 3237 | |
1499e0a8 | 3238 | temp = expand_expr (exp, NULL_RTX, VOIDmode, 0); |
b258707c | 3239 | |
766f36c7 | 3240 | /* If TEMP is a volatile MEM and we want a result value, make |
f29369b9 RK |
3241 | the access now so it gets done only once. Likewise if |
3242 | it contains TARGET. */ | |
3243 | if (GET_CODE (temp) == MEM && want_value | |
3244 | && (MEM_VOLATILE_P (temp) | |
3245 | || reg_mentioned_p (SUBREG_REG (target), XEXP (temp, 0)))) | |
766f36c7 RK |
3246 | temp = copy_to_reg (temp); |
3247 | ||
b258707c RS |
3248 | /* If TEMP is a VOIDmode constant, use convert_modes to make |
3249 | sure that we properly convert it. */ | |
3250 | if (CONSTANT_P (temp) && GET_MODE (temp) == VOIDmode) | |
3251 | temp = convert_modes (GET_MODE (SUBREG_REG (target)), | |
3252 | TYPE_MODE (TREE_TYPE (exp)), temp, | |
3253 | SUBREG_PROMOTED_UNSIGNED_P (target)); | |
3254 | ||
1499e0a8 RK |
3255 | convert_move (SUBREG_REG (target), temp, |
3256 | SUBREG_PROMOTED_UNSIGNED_P (target)); | |
709f5be1 | 3257 | return want_value ? temp : NULL_RTX; |
1499e0a8 | 3258 | } |
bbf6f052 RK |
3259 | else |
3260 | { | |
3261 | temp = expand_expr (exp, target, GET_MODE (target), 0); | |
766f36c7 | 3262 | /* Return TARGET if it's a specified hardware register. |
709f5be1 RS |
3263 | If TARGET is a volatile mem ref, either return TARGET |
3264 | or return a reg copied *from* TARGET; ANSI requires this. | |
3265 | ||
3266 | Otherwise, if TEMP is not TARGET, return TEMP | |
3267 | if it is constant (for efficiency), | |
3268 | or if we really want the correct value. */ | |
bbf6f052 RK |
3269 | if (!(target && GET_CODE (target) == REG |
3270 | && REGNO (target) < FIRST_PSEUDO_REGISTER) | |
709f5be1 | 3271 | && !(GET_CODE (target) == MEM && MEM_VOLATILE_P (target)) |
effbcc6a | 3272 | && ! rtx_equal_p (temp, target) |
709f5be1 | 3273 | && (CONSTANT_P (temp) || want_value)) |
bbf6f052 RK |
3274 | dont_return_target = 1; |
3275 | } | |
3276 | ||
b258707c RS |
3277 | /* If TEMP is a VOIDmode constant and the mode of the type of EXP is not |
3278 | the same as that of TARGET, adjust the constant. This is needed, for | |
3279 | example, in case it is a CONST_DOUBLE and we want only a word-sized | |
3280 | value. */ | |
3281 | if (CONSTANT_P (temp) && GET_MODE (temp) == VOIDmode | |
c1da1f33 | 3282 | && TREE_CODE (exp) != ERROR_MARK |
b258707c RS |
3283 | && GET_MODE (target) != TYPE_MODE (TREE_TYPE (exp))) |
3284 | temp = convert_modes (GET_MODE (target), TYPE_MODE (TREE_TYPE (exp)), | |
3285 | temp, TREE_UNSIGNED (TREE_TYPE (exp))); | |
3286 | ||
921b3427 RK |
3287 | if (flag_check_memory_usage |
3288 | && GET_CODE (target) == MEM | |
3289 | && AGGREGATE_TYPE_P (TREE_TYPE (exp))) | |
3290 | { | |
3291 | if (GET_CODE (temp) == MEM) | |
3292 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, | |
3293 | XEXP (target, 0), ptr_mode, | |
3294 | XEXP (temp, 0), ptr_mode, | |
3295 | expr_size (exp), TYPE_MODE (sizetype)); | |
3296 | else | |
3297 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
3298 | XEXP (target, 0), ptr_mode, | |
3299 | expr_size (exp), TYPE_MODE (sizetype), | |
956d6950 JL |
3300 | GEN_INT (MEMORY_USE_WO), |
3301 | TYPE_MODE (integer_type_node)); | |
921b3427 RK |
3302 | } |
3303 | ||
bbf6f052 RK |
3304 | /* If value was not generated in the target, store it there. |
3305 | Convert the value to TARGET's type first if nec. */ | |
3306 | ||
effbcc6a | 3307 | if (! rtx_equal_p (temp, target) && TREE_CODE (exp) != ERROR_MARK) |
bbf6f052 RK |
3308 | { |
3309 | target = protect_from_queue (target, 1); | |
3310 | if (GET_MODE (temp) != GET_MODE (target) | |
3311 | && GET_MODE (temp) != VOIDmode) | |
3312 | { | |
3313 | int unsignedp = TREE_UNSIGNED (TREE_TYPE (exp)); | |
3314 | if (dont_return_target) | |
3315 | { | |
3316 | /* In this case, we will return TEMP, | |
3317 | so make sure it has the proper mode. | |
3318 | But don't forget to store the value into TARGET. */ | |
3319 | temp = convert_to_mode (GET_MODE (target), temp, unsignedp); | |
3320 | emit_move_insn (target, temp); | |
3321 | } | |
3322 | else | |
3323 | convert_move (target, temp, unsignedp); | |
3324 | } | |
3325 | ||
3326 | else if (GET_MODE (temp) == BLKmode && TREE_CODE (exp) == STRING_CST) | |
3327 | { | |
3328 | /* Handle copying a string constant into an array. | |
3329 | The string constant may be shorter than the array. | |
3330 | So copy just the string's actual length, and clear the rest. */ | |
3331 | rtx size; | |
22619c3f | 3332 | rtx addr; |
bbf6f052 | 3333 | |
e87b4f3f RS |
3334 | /* Get the size of the data type of the string, |
3335 | which is actually the size of the target. */ | |
3336 | size = expr_size (exp); | |
3337 | if (GET_CODE (size) == CONST_INT | |
3338 | && INTVAL (size) < TREE_STRING_LENGTH (exp)) | |
3339 | emit_block_move (target, temp, size, | |
3340 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
3341 | else | |
bbf6f052 | 3342 | { |
e87b4f3f RS |
3343 | /* Compute the size of the data to copy from the string. */ |
3344 | tree copy_size | |
c03b7665 | 3345 | = size_binop (MIN_EXPR, |
b50d17a1 | 3346 | make_tree (sizetype, size), |
c03b7665 RK |
3347 | convert (sizetype, |
3348 | build_int_2 (TREE_STRING_LENGTH (exp), 0))); | |
906c4e36 RK |
3349 | rtx copy_size_rtx = expand_expr (copy_size, NULL_RTX, |
3350 | VOIDmode, 0); | |
e87b4f3f RS |
3351 | rtx label = 0; |
3352 | ||
3353 | /* Copy that much. */ | |
3354 | emit_block_move (target, temp, copy_size_rtx, | |
3355 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
3356 | ||
88f63c77 RK |
3357 | /* Figure out how much is left in TARGET that we have to clear. |
3358 | Do all calculations in ptr_mode. */ | |
3359 | ||
3360 | addr = XEXP (target, 0); | |
3361 | addr = convert_modes (ptr_mode, Pmode, addr, 1); | |
3362 | ||
e87b4f3f RS |
3363 | if (GET_CODE (copy_size_rtx) == CONST_INT) |
3364 | { | |
88f63c77 | 3365 | addr = plus_constant (addr, TREE_STRING_LENGTH (exp)); |
22619c3f | 3366 | size = plus_constant (size, - TREE_STRING_LENGTH (exp)); |
e87b4f3f RS |
3367 | } |
3368 | else | |
3369 | { | |
88f63c77 RK |
3370 | addr = force_reg (ptr_mode, addr); |
3371 | addr = expand_binop (ptr_mode, add_optab, addr, | |
906c4e36 RK |
3372 | copy_size_rtx, NULL_RTX, 0, |
3373 | OPTAB_LIB_WIDEN); | |
e87b4f3f | 3374 | |
88f63c77 | 3375 | size = expand_binop (ptr_mode, sub_optab, size, |
906c4e36 RK |
3376 | copy_size_rtx, NULL_RTX, 0, |
3377 | OPTAB_LIB_WIDEN); | |
e87b4f3f | 3378 | |
906c4e36 | 3379 | emit_cmp_insn (size, const0_rtx, LT, NULL_RTX, |
e87b4f3f RS |
3380 | GET_MODE (size), 0, 0); |
3381 | label = gen_label_rtx (); | |
3382 | emit_jump_insn (gen_blt (label)); | |
3383 | } | |
3384 | ||
3385 | if (size != const0_rtx) | |
3386 | { | |
921b3427 RK |
3387 | /* Be sure we can write on ADDR. */ |
3388 | if (flag_check_memory_usage) | |
3389 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
3390 | addr, ptr_mode, | |
3391 | size, TYPE_MODE (sizetype), | |
956d6950 JL |
3392 | GEN_INT (MEMORY_USE_WO), |
3393 | TYPE_MODE (integer_type_node)); | |
bbf6f052 | 3394 | #ifdef TARGET_MEM_FUNCTIONS |
3b6f75e2 | 3395 | emit_library_call (memset_libfunc, 0, VOIDmode, 3, |
86242483 | 3396 | addr, ptr_mode, |
3b6f75e2 JW |
3397 | const0_rtx, TYPE_MODE (integer_type_node), |
3398 | convert_to_mode (TYPE_MODE (sizetype), | |
3399 | size, | |
3400 | TREE_UNSIGNED (sizetype)), | |
3401 | TYPE_MODE (sizetype)); | |
bbf6f052 | 3402 | #else |
d562e42e | 3403 | emit_library_call (bzero_libfunc, 0, VOIDmode, 2, |
86242483 | 3404 | addr, ptr_mode, |
3b6f75e2 JW |
3405 | convert_to_mode (TYPE_MODE (integer_type_node), |
3406 | size, | |
3407 | TREE_UNSIGNED (integer_type_node)), | |
3408 | TYPE_MODE (integer_type_node)); | |
bbf6f052 | 3409 | #endif |
e87b4f3f | 3410 | } |
22619c3f | 3411 | |
e87b4f3f RS |
3412 | if (label) |
3413 | emit_label (label); | |
bbf6f052 RK |
3414 | } |
3415 | } | |
fffa9c1d JW |
3416 | /* Handle calls that return values in multiple non-contiguous locations. |
3417 | The Irix 6 ABI has examples of this. */ | |
3418 | else if (GET_CODE (target) == PARALLEL) | |
3419 | emit_group_load (target, temp); | |
bbf6f052 RK |
3420 | else if (GET_MODE (temp) == BLKmode) |
3421 | emit_block_move (target, temp, expr_size (exp), | |
3422 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
3423 | else | |
3424 | emit_move_insn (target, temp); | |
3425 | } | |
709f5be1 | 3426 | |
766f36c7 RK |
3427 | /* If we don't want a value, return NULL_RTX. */ |
3428 | if (! want_value) | |
3429 | return NULL_RTX; | |
3430 | ||
3431 | /* If we are supposed to return TEMP, do so as long as it isn't a MEM. | |
3432 | ??? The latter test doesn't seem to make sense. */ | |
3433 | else if (dont_return_target && GET_CODE (temp) != MEM) | |
bbf6f052 | 3434 | return temp; |
766f36c7 RK |
3435 | |
3436 | /* Return TARGET itself if it is a hard register. */ | |
3437 | else if (want_value && GET_MODE (target) != BLKmode | |
3438 | && ! (GET_CODE (target) == REG | |
3439 | && REGNO (target) < FIRST_PSEUDO_REGISTER)) | |
709f5be1 | 3440 | return copy_to_reg (target); |
766f36c7 RK |
3441 | |
3442 | else | |
709f5be1 | 3443 | return target; |
bbf6f052 RK |
3444 | } |
3445 | \f | |
9de08200 RK |
3446 | /* Return 1 if EXP just contains zeros. */ |
3447 | ||
3448 | static int | |
3449 | is_zeros_p (exp) | |
3450 | tree exp; | |
3451 | { | |
3452 | tree elt; | |
3453 | ||
3454 | switch (TREE_CODE (exp)) | |
3455 | { | |
3456 | case CONVERT_EXPR: | |
3457 | case NOP_EXPR: | |
3458 | case NON_LVALUE_EXPR: | |
3459 | return is_zeros_p (TREE_OPERAND (exp, 0)); | |
3460 | ||
3461 | case INTEGER_CST: | |
3462 | return TREE_INT_CST_LOW (exp) == 0 && TREE_INT_CST_HIGH (exp) == 0; | |
3463 | ||
3464 | case COMPLEX_CST: | |
3465 | return | |
3466 | is_zeros_p (TREE_REALPART (exp)) && is_zeros_p (TREE_IMAGPART (exp)); | |
3467 | ||
3468 | case REAL_CST: | |
41c9120b | 3469 | return REAL_VALUES_IDENTICAL (TREE_REAL_CST (exp), dconst0); |
9de08200 RK |
3470 | |
3471 | case CONSTRUCTOR: | |
e1a43f73 PB |
3472 | if (TREE_TYPE (exp) && TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) |
3473 | return CONSTRUCTOR_ELTS (exp) == NULL_TREE; | |
9de08200 RK |
3474 | for (elt = CONSTRUCTOR_ELTS (exp); elt; elt = TREE_CHAIN (elt)) |
3475 | if (! is_zeros_p (TREE_VALUE (elt))) | |
3476 | return 0; | |
3477 | ||
3478 | return 1; | |
e9a25f70 JL |
3479 | |
3480 | default: | |
3481 | return 0; | |
9de08200 | 3482 | } |
9de08200 RK |
3483 | } |
3484 | ||
3485 | /* Return 1 if EXP contains mostly (3/4) zeros. */ | |
3486 | ||
3487 | static int | |
3488 | mostly_zeros_p (exp) | |
3489 | tree exp; | |
3490 | { | |
9de08200 RK |
3491 | if (TREE_CODE (exp) == CONSTRUCTOR) |
3492 | { | |
e1a43f73 PB |
3493 | int elts = 0, zeros = 0; |
3494 | tree elt = CONSTRUCTOR_ELTS (exp); | |
3495 | if (TREE_TYPE (exp) && TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) | |
3496 | { | |
3497 | /* If there are no ranges of true bits, it is all zero. */ | |
3498 | return elt == NULL_TREE; | |
3499 | } | |
3500 | for (; elt; elt = TREE_CHAIN (elt)) | |
3501 | { | |
3502 | /* We do not handle the case where the index is a RANGE_EXPR, | |
3503 | so the statistic will be somewhat inaccurate. | |
3504 | We do make a more accurate count in store_constructor itself, | |
3505 | so since this function is only used for nested array elements, | |
0f41302f | 3506 | this should be close enough. */ |
e1a43f73 PB |
3507 | if (mostly_zeros_p (TREE_VALUE (elt))) |
3508 | zeros++; | |
3509 | elts++; | |
3510 | } | |
9de08200 RK |
3511 | |
3512 | return 4 * zeros >= 3 * elts; | |
3513 | } | |
3514 | ||
3515 | return is_zeros_p (exp); | |
3516 | } | |
3517 | \f | |
e1a43f73 PB |
3518 | /* Helper function for store_constructor. |
3519 | TARGET, BITSIZE, BITPOS, MODE, EXP are as for store_field. | |
3520 | TYPE is the type of the CONSTRUCTOR, not the element type. | |
23ccec44 JW |
3521 | CLEARED is as for store_constructor. |
3522 | ||
3523 | This provides a recursive shortcut back to store_constructor when it isn't | |
3524 | necessary to go through store_field. This is so that we can pass through | |
3525 | the cleared field to let store_constructor know that we may not have to | |
3526 | clear a substructure if the outer structure has already been cleared. */ | |
e1a43f73 PB |
3527 | |
3528 | static void | |
3529 | store_constructor_field (target, bitsize, bitpos, | |
3530 | mode, exp, type, cleared) | |
3531 | rtx target; | |
3532 | int bitsize, bitpos; | |
3533 | enum machine_mode mode; | |
3534 | tree exp, type; | |
3535 | int cleared; | |
3536 | { | |
3537 | if (TREE_CODE (exp) == CONSTRUCTOR | |
23ccec44 JW |
3538 | && bitpos % BITS_PER_UNIT == 0 |
3539 | /* If we have a non-zero bitpos for a register target, then we just | |
3540 | let store_field do the bitfield handling. This is unlikely to | |
3541 | generate unnecessary clear instructions anyways. */ | |
3542 | && (bitpos == 0 || GET_CODE (target) == MEM)) | |
e1a43f73 | 3543 | { |
126e5b0d JW |
3544 | if (bitpos != 0) |
3545 | target = change_address (target, VOIDmode, | |
3546 | plus_constant (XEXP (target, 0), | |
3547 | bitpos / BITS_PER_UNIT)); | |
3548 | store_constructor (exp, target, cleared); | |
e1a43f73 PB |
3549 | } |
3550 | else | |
3551 | store_field (target, bitsize, bitpos, mode, exp, | |
3552 | VOIDmode, 0, TYPE_ALIGN (type) / BITS_PER_UNIT, | |
3553 | int_size_in_bytes (type)); | |
3554 | } | |
3555 | ||
bbf6f052 | 3556 | /* Store the value of constructor EXP into the rtx TARGET. |
e1a43f73 | 3557 | TARGET is either a REG or a MEM. |
0f41302f | 3558 | CLEARED is true if TARGET is known to have been zero'd. */ |
bbf6f052 RK |
3559 | |
3560 | static void | |
e1a43f73 | 3561 | store_constructor (exp, target, cleared) |
bbf6f052 RK |
3562 | tree exp; |
3563 | rtx target; | |
e1a43f73 | 3564 | int cleared; |
bbf6f052 | 3565 | { |
4af3895e JVA |
3566 | tree type = TREE_TYPE (exp); |
3567 | ||
bbf6f052 RK |
3568 | /* We know our target cannot conflict, since safe_from_p has been called. */ |
3569 | #if 0 | |
3570 | /* Don't try copying piece by piece into a hard register | |
3571 | since that is vulnerable to being clobbered by EXP. | |
3572 | Instead, construct in a pseudo register and then copy it all. */ | |
3573 | if (GET_CODE (target) == REG && REGNO (target) < FIRST_PSEUDO_REGISTER) | |
3574 | { | |
3575 | rtx temp = gen_reg_rtx (GET_MODE (target)); | |
e1a43f73 | 3576 | store_constructor (exp, temp, 0); |
bbf6f052 RK |
3577 | emit_move_insn (target, temp); |
3578 | return; | |
3579 | } | |
3580 | #endif | |
3581 | ||
e44842fe RK |
3582 | if (TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE |
3583 | || TREE_CODE (type) == QUAL_UNION_TYPE) | |
bbf6f052 RK |
3584 | { |
3585 | register tree elt; | |
3586 | ||
4af3895e | 3587 | /* Inform later passes that the whole union value is dead. */ |
e44842fe RK |
3588 | if (TREE_CODE (type) == UNION_TYPE |
3589 | || TREE_CODE (type) == QUAL_UNION_TYPE) | |
38a448ca | 3590 | emit_insn (gen_rtx_CLOBBER (VOIDmode, target)); |
4af3895e JVA |
3591 | |
3592 | /* If we are building a static constructor into a register, | |
3593 | set the initial value as zero so we can fold the value into | |
67225c15 RK |
3594 | a constant. But if more than one register is involved, |
3595 | this probably loses. */ | |
3596 | else if (GET_CODE (target) == REG && TREE_STATIC (exp) | |
3597 | && GET_MODE_SIZE (GET_MODE (target)) <= UNITS_PER_WORD) | |
9de08200 RK |
3598 | { |
3599 | if (! cleared) | |
e9a25f70 | 3600 | emit_move_insn (target, CONST0_RTX (GET_MODE (target))); |
4af3895e | 3601 | |
9de08200 RK |
3602 | cleared = 1; |
3603 | } | |
3604 | ||
3605 | /* If the constructor has fewer fields than the structure | |
3606 | or if we are initializing the structure to mostly zeros, | |
bbf6f052 | 3607 | clear the whole structure first. */ |
9de08200 RK |
3608 | else if ((list_length (CONSTRUCTOR_ELTS (exp)) |
3609 | != list_length (TYPE_FIELDS (type))) | |
3610 | || mostly_zeros_p (exp)) | |
3611 | { | |
3612 | if (! cleared) | |
3613 | clear_storage (target, expr_size (exp), | |
3614 | TYPE_ALIGN (type) / BITS_PER_UNIT); | |
3615 | ||
3616 | cleared = 1; | |
3617 | } | |
bbf6f052 RK |
3618 | else |
3619 | /* Inform later passes that the old value is dead. */ | |
38a448ca | 3620 | emit_insn (gen_rtx_CLOBBER (VOIDmode, target)); |
bbf6f052 RK |
3621 | |
3622 | /* Store each element of the constructor into | |
3623 | the corresponding field of TARGET. */ | |
3624 | ||
3625 | for (elt = CONSTRUCTOR_ELTS (exp); elt; elt = TREE_CHAIN (elt)) | |
3626 | { | |
3627 | register tree field = TREE_PURPOSE (elt); | |
3628 | register enum machine_mode mode; | |
3629 | int bitsize; | |
b50d17a1 | 3630 | int bitpos = 0; |
bbf6f052 | 3631 | int unsignedp; |
b50d17a1 RK |
3632 | tree pos, constant = 0, offset = 0; |
3633 | rtx to_rtx = target; | |
bbf6f052 | 3634 | |
f32fd778 RS |
3635 | /* Just ignore missing fields. |
3636 | We cleared the whole structure, above, | |
3637 | if any fields are missing. */ | |
3638 | if (field == 0) | |
3639 | continue; | |
3640 | ||
e1a43f73 PB |
3641 | if (cleared && is_zeros_p (TREE_VALUE (elt))) |
3642 | continue; | |
9de08200 | 3643 | |
bbf6f052 RK |
3644 | bitsize = TREE_INT_CST_LOW (DECL_SIZE (field)); |
3645 | unsignedp = TREE_UNSIGNED (field); | |
3646 | mode = DECL_MODE (field); | |
3647 | if (DECL_BIT_FIELD (field)) | |
3648 | mode = VOIDmode; | |
3649 | ||
b50d17a1 RK |
3650 | pos = DECL_FIELD_BITPOS (field); |
3651 | if (TREE_CODE (pos) == INTEGER_CST) | |
3652 | constant = pos; | |
3653 | else if (TREE_CODE (pos) == PLUS_EXPR | |
3654 | && TREE_CODE (TREE_OPERAND (pos, 1)) == INTEGER_CST) | |
3655 | constant = TREE_OPERAND (pos, 1), offset = TREE_OPERAND (pos, 0); | |
3656 | else | |
3657 | offset = pos; | |
3658 | ||
3659 | if (constant) | |
cd11b87e | 3660 | bitpos = TREE_INT_CST_LOW (constant); |
b50d17a1 RK |
3661 | |
3662 | if (offset) | |
3663 | { | |
3664 | rtx offset_rtx; | |
3665 | ||
3666 | if (contains_placeholder_p (offset)) | |
3667 | offset = build (WITH_RECORD_EXPR, sizetype, | |
956d6950 | 3668 | offset, make_tree (TREE_TYPE (exp), target)); |
bbf6f052 | 3669 | |
b50d17a1 RK |
3670 | offset = size_binop (FLOOR_DIV_EXPR, offset, |
3671 | size_int (BITS_PER_UNIT)); | |
bbf6f052 | 3672 | |
b50d17a1 RK |
3673 | offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, 0); |
3674 | if (GET_CODE (to_rtx) != MEM) | |
3675 | abort (); | |
3676 | ||
3677 | to_rtx | |
3678 | = change_address (to_rtx, VOIDmode, | |
38a448ca | 3679 | gen_rtx_PLUS (ptr_mode, XEXP (to_rtx, 0), |
88f63c77 | 3680 | force_reg (ptr_mode, offset_rtx))); |
b50d17a1 | 3681 | } |
cf04eb80 RK |
3682 | if (TREE_READONLY (field)) |
3683 | { | |
9151b3bf | 3684 | if (GET_CODE (to_rtx) == MEM) |
effbcc6a RK |
3685 | to_rtx = copy_rtx (to_rtx); |
3686 | ||
cf04eb80 RK |
3687 | RTX_UNCHANGING_P (to_rtx) = 1; |
3688 | } | |
3689 | ||
e1a43f73 PB |
3690 | store_constructor_field (to_rtx, bitsize, bitpos, |
3691 | mode, TREE_VALUE (elt), type, cleared); | |
bbf6f052 RK |
3692 | } |
3693 | } | |
4af3895e | 3694 | else if (TREE_CODE (type) == ARRAY_TYPE) |
bbf6f052 RK |
3695 | { |
3696 | register tree elt; | |
3697 | register int i; | |
e1a43f73 | 3698 | int need_to_clear; |
4af3895e | 3699 | tree domain = TYPE_DOMAIN (type); |
906c4e36 RK |
3700 | HOST_WIDE_INT minelt = TREE_INT_CST_LOW (TYPE_MIN_VALUE (domain)); |
3701 | HOST_WIDE_INT maxelt = TREE_INT_CST_LOW (TYPE_MAX_VALUE (domain)); | |
4af3895e | 3702 | tree elttype = TREE_TYPE (type); |
bbf6f052 | 3703 | |
e1a43f73 | 3704 | /* If the constructor has fewer elements than the array, |
38e01259 | 3705 | clear the whole array first. Similarly if this is |
e1a43f73 PB |
3706 | static constructor of a non-BLKmode object. */ |
3707 | if (cleared || (GET_CODE (target) == REG && TREE_STATIC (exp))) | |
3708 | need_to_clear = 1; | |
3709 | else | |
3710 | { | |
3711 | HOST_WIDE_INT count = 0, zero_count = 0; | |
3712 | need_to_clear = 0; | |
3713 | /* This loop is a more accurate version of the loop in | |
3714 | mostly_zeros_p (it handles RANGE_EXPR in an index). | |
3715 | It is also needed to check for missing elements. */ | |
3716 | for (elt = CONSTRUCTOR_ELTS (exp); | |
3717 | elt != NULL_TREE; | |
df0faff1 | 3718 | elt = TREE_CHAIN (elt)) |
e1a43f73 PB |
3719 | { |
3720 | tree index = TREE_PURPOSE (elt); | |
3721 | HOST_WIDE_INT this_node_count; | |
3722 | if (index != NULL_TREE && TREE_CODE (index) == RANGE_EXPR) | |
3723 | { | |
3724 | tree lo_index = TREE_OPERAND (index, 0); | |
3725 | tree hi_index = TREE_OPERAND (index, 1); | |
3726 | if (TREE_CODE (lo_index) != INTEGER_CST | |
3727 | || TREE_CODE (hi_index) != INTEGER_CST) | |
3728 | { | |
3729 | need_to_clear = 1; | |
3730 | break; | |
3731 | } | |
3732 | this_node_count = TREE_INT_CST_LOW (hi_index) | |
3733 | - TREE_INT_CST_LOW (lo_index) + 1; | |
3734 | } | |
3735 | else | |
3736 | this_node_count = 1; | |
3737 | count += this_node_count; | |
3738 | if (mostly_zeros_p (TREE_VALUE (elt))) | |
3739 | zero_count += this_node_count; | |
3740 | } | |
8e958f70 | 3741 | /* Clear the entire array first if there are any missing elements, |
0f41302f | 3742 | or if the incidence of zero elements is >= 75%. */ |
8e958f70 PB |
3743 | if (count < maxelt - minelt + 1 |
3744 | || 4 * zero_count >= 3 * count) | |
e1a43f73 PB |
3745 | need_to_clear = 1; |
3746 | } | |
3747 | if (need_to_clear) | |
9de08200 RK |
3748 | { |
3749 | if (! cleared) | |
3750 | clear_storage (target, expr_size (exp), | |
3751 | TYPE_ALIGN (type) / BITS_PER_UNIT); | |
9de08200 RK |
3752 | cleared = 1; |
3753 | } | |
bbf6f052 RK |
3754 | else |
3755 | /* Inform later passes that the old value is dead. */ | |
38a448ca | 3756 | emit_insn (gen_rtx_CLOBBER (VOIDmode, target)); |
bbf6f052 RK |
3757 | |
3758 | /* Store each element of the constructor into | |
3759 | the corresponding element of TARGET, determined | |
3760 | by counting the elements. */ | |
3761 | for (elt = CONSTRUCTOR_ELTS (exp), i = 0; | |
3762 | elt; | |
3763 | elt = TREE_CHAIN (elt), i++) | |
3764 | { | |
3765 | register enum machine_mode mode; | |
3766 | int bitsize; | |
3767 | int bitpos; | |
3768 | int unsignedp; | |
e1a43f73 | 3769 | tree value = TREE_VALUE (elt); |
03dc44a6 RS |
3770 | tree index = TREE_PURPOSE (elt); |
3771 | rtx xtarget = target; | |
bbf6f052 | 3772 | |
e1a43f73 PB |
3773 | if (cleared && is_zeros_p (value)) |
3774 | continue; | |
9de08200 | 3775 | |
bbf6f052 RK |
3776 | mode = TYPE_MODE (elttype); |
3777 | bitsize = GET_MODE_BITSIZE (mode); | |
3778 | unsignedp = TREE_UNSIGNED (elttype); | |
3779 | ||
e1a43f73 PB |
3780 | if (index != NULL_TREE && TREE_CODE (index) == RANGE_EXPR) |
3781 | { | |
3782 | tree lo_index = TREE_OPERAND (index, 0); | |
3783 | tree hi_index = TREE_OPERAND (index, 1); | |
3784 | rtx index_r, pos_rtx, addr, hi_r, loop_top, loop_end; | |
3785 | struct nesting *loop; | |
05c0b405 PB |
3786 | HOST_WIDE_INT lo, hi, count; |
3787 | tree position; | |
e1a43f73 | 3788 | |
0f41302f | 3789 | /* If the range is constant and "small", unroll the loop. */ |
e1a43f73 | 3790 | if (TREE_CODE (lo_index) == INTEGER_CST |
05c0b405 PB |
3791 | && TREE_CODE (hi_index) == INTEGER_CST |
3792 | && (lo = TREE_INT_CST_LOW (lo_index), | |
3793 | hi = TREE_INT_CST_LOW (hi_index), | |
3794 | count = hi - lo + 1, | |
3795 | (GET_CODE (target) != MEM | |
3796 | || count <= 2 | |
3797 | || (TREE_CODE (TYPE_SIZE (elttype)) == INTEGER_CST | |
3798 | && TREE_INT_CST_LOW (TYPE_SIZE (elttype)) * count | |
3799 | <= 40 * 8)))) | |
e1a43f73 | 3800 | { |
05c0b405 PB |
3801 | lo -= minelt; hi -= minelt; |
3802 | for (; lo <= hi; lo++) | |
e1a43f73 | 3803 | { |
05c0b405 PB |
3804 | bitpos = lo * TREE_INT_CST_LOW (TYPE_SIZE (elttype)); |
3805 | store_constructor_field (target, bitsize, bitpos, | |
3806 | mode, value, type, cleared); | |
e1a43f73 PB |
3807 | } |
3808 | } | |
3809 | else | |
3810 | { | |
3811 | hi_r = expand_expr (hi_index, NULL_RTX, VOIDmode, 0); | |
3812 | loop_top = gen_label_rtx (); | |
3813 | loop_end = gen_label_rtx (); | |
3814 | ||
3815 | unsignedp = TREE_UNSIGNED (domain); | |
3816 | ||
3817 | index = build_decl (VAR_DECL, NULL_TREE, domain); | |
3818 | ||
3819 | DECL_RTL (index) = index_r | |
3820 | = gen_reg_rtx (promote_mode (domain, DECL_MODE (index), | |
3821 | &unsignedp, 0)); | |
3822 | ||
3823 | if (TREE_CODE (value) == SAVE_EXPR | |
3824 | && SAVE_EXPR_RTL (value) == 0) | |
3825 | { | |
0f41302f MS |
3826 | /* Make sure value gets expanded once before the |
3827 | loop. */ | |
e1a43f73 PB |
3828 | expand_expr (value, const0_rtx, VOIDmode, 0); |
3829 | emit_queue (); | |
3830 | } | |
3831 | store_expr (lo_index, index_r, 0); | |
3832 | loop = expand_start_loop (0); | |
3833 | ||
0f41302f | 3834 | /* Assign value to element index. */ |
e1a43f73 PB |
3835 | position = size_binop (EXACT_DIV_EXPR, TYPE_SIZE (elttype), |
3836 | size_int (BITS_PER_UNIT)); | |
3837 | position = size_binop (MULT_EXPR, | |
3838 | size_binop (MINUS_EXPR, index, | |
3839 | TYPE_MIN_VALUE (domain)), | |
3840 | position); | |
3841 | pos_rtx = expand_expr (position, 0, VOIDmode, 0); | |
38a448ca | 3842 | addr = gen_rtx_PLUS (Pmode, XEXP (target, 0), pos_rtx); |
e1a43f73 PB |
3843 | xtarget = change_address (target, mode, addr); |
3844 | if (TREE_CODE (value) == CONSTRUCTOR) | |
05c0b405 | 3845 | store_constructor (value, xtarget, cleared); |
e1a43f73 PB |
3846 | else |
3847 | store_expr (value, xtarget, 0); | |
3848 | ||
3849 | expand_exit_loop_if_false (loop, | |
3850 | build (LT_EXPR, integer_type_node, | |
3851 | index, hi_index)); | |
3852 | ||
3853 | expand_increment (build (PREINCREMENT_EXPR, | |
3854 | TREE_TYPE (index), | |
7b8b9722 | 3855 | index, integer_one_node), 0, 0); |
e1a43f73 PB |
3856 | expand_end_loop (); |
3857 | emit_label (loop_end); | |
3858 | ||
3859 | /* Needed by stupid register allocation. to extend the | |
3860 | lifetime of pseudo-regs used by target past the end | |
3861 | of the loop. */ | |
38a448ca | 3862 | emit_insn (gen_rtx_USE (GET_MODE (target), target)); |
e1a43f73 PB |
3863 | } |
3864 | } | |
3865 | else if ((index != 0 && TREE_CODE (index) != INTEGER_CST) | |
5b6c44ff | 3866 | || TREE_CODE (TYPE_SIZE (elttype)) != INTEGER_CST) |
03dc44a6 | 3867 | { |
e1a43f73 | 3868 | rtx pos_rtx, addr; |
03dc44a6 RS |
3869 | tree position; |
3870 | ||
5b6c44ff RK |
3871 | if (index == 0) |
3872 | index = size_int (i); | |
3873 | ||
e1a43f73 PB |
3874 | if (minelt) |
3875 | index = size_binop (MINUS_EXPR, index, | |
3876 | TYPE_MIN_VALUE (domain)); | |
5b6c44ff RK |
3877 | position = size_binop (EXACT_DIV_EXPR, TYPE_SIZE (elttype), |
3878 | size_int (BITS_PER_UNIT)); | |
3879 | position = size_binop (MULT_EXPR, index, position); | |
03dc44a6 | 3880 | pos_rtx = expand_expr (position, 0, VOIDmode, 0); |
38a448ca | 3881 | addr = gen_rtx_PLUS (Pmode, XEXP (target, 0), pos_rtx); |
03dc44a6 | 3882 | xtarget = change_address (target, mode, addr); |
e1a43f73 | 3883 | store_expr (value, xtarget, 0); |
03dc44a6 RS |
3884 | } |
3885 | else | |
3886 | { | |
3887 | if (index != 0) | |
7c314719 | 3888 | bitpos = ((TREE_INT_CST_LOW (index) - minelt) |
03dc44a6 RS |
3889 | * TREE_INT_CST_LOW (TYPE_SIZE (elttype))); |
3890 | else | |
3891 | bitpos = (i * TREE_INT_CST_LOW (TYPE_SIZE (elttype))); | |
e1a43f73 PB |
3892 | store_constructor_field (target, bitsize, bitpos, |
3893 | mode, value, type, cleared); | |
03dc44a6 | 3894 | } |
bbf6f052 RK |
3895 | } |
3896 | } | |
071a6595 PB |
3897 | /* set constructor assignments */ |
3898 | else if (TREE_CODE (type) == SET_TYPE) | |
3899 | { | |
e1a43f73 | 3900 | tree elt = CONSTRUCTOR_ELTS (exp); |
e1a43f73 | 3901 | int nbytes = int_size_in_bytes (type), nbits; |
071a6595 PB |
3902 | tree domain = TYPE_DOMAIN (type); |
3903 | tree domain_min, domain_max, bitlength; | |
3904 | ||
9faa82d8 | 3905 | /* The default implementation strategy is to extract the constant |
071a6595 PB |
3906 | parts of the constructor, use that to initialize the target, |
3907 | and then "or" in whatever non-constant ranges we need in addition. | |
3908 | ||
3909 | If a large set is all zero or all ones, it is | |
3910 | probably better to set it using memset (if available) or bzero. | |
3911 | Also, if a large set has just a single range, it may also be | |
3912 | better to first clear all the first clear the set (using | |
0f41302f | 3913 | bzero/memset), and set the bits we want. */ |
071a6595 | 3914 | |
0f41302f | 3915 | /* Check for all zeros. */ |
e1a43f73 | 3916 | if (elt == NULL_TREE) |
071a6595 | 3917 | { |
e1a43f73 PB |
3918 | if (!cleared) |
3919 | clear_storage (target, expr_size (exp), | |
3920 | TYPE_ALIGN (type) / BITS_PER_UNIT); | |
071a6595 PB |
3921 | return; |
3922 | } | |
3923 | ||
071a6595 PB |
3924 | domain_min = convert (sizetype, TYPE_MIN_VALUE (domain)); |
3925 | domain_max = convert (sizetype, TYPE_MAX_VALUE (domain)); | |
3926 | bitlength = size_binop (PLUS_EXPR, | |
3927 | size_binop (MINUS_EXPR, domain_max, domain_min), | |
3928 | size_one_node); | |
3929 | ||
e1a43f73 PB |
3930 | if (nbytes < 0 || TREE_CODE (bitlength) != INTEGER_CST) |
3931 | abort (); | |
3932 | nbits = TREE_INT_CST_LOW (bitlength); | |
3933 | ||
3934 | /* For "small" sets, or "medium-sized" (up to 32 bytes) sets that | |
3935 | are "complicated" (more than one range), initialize (the | |
3936 | constant parts) by copying from a constant. */ | |
3937 | if (GET_MODE (target) != BLKmode || nbits <= 2 * BITS_PER_WORD | |
3938 | || (nbytes <= 32 && TREE_CHAIN (elt) != NULL_TREE)) | |
071a6595 | 3939 | { |
b4ee5a72 PB |
3940 | int set_word_size = TYPE_ALIGN (TREE_TYPE (exp)); |
3941 | enum machine_mode mode = mode_for_size (set_word_size, MODE_INT, 1); | |
0f41302f | 3942 | char *bit_buffer = (char *) alloca (nbits); |
b4ee5a72 PB |
3943 | HOST_WIDE_INT word = 0; |
3944 | int bit_pos = 0; | |
3945 | int ibit = 0; | |
0f41302f | 3946 | int offset = 0; /* In bytes from beginning of set. */ |
e1a43f73 | 3947 | elt = get_set_constructor_bits (exp, bit_buffer, nbits); |
b4ee5a72 | 3948 | for (;;) |
071a6595 | 3949 | { |
b4ee5a72 PB |
3950 | if (bit_buffer[ibit]) |
3951 | { | |
b09f3348 | 3952 | if (BYTES_BIG_ENDIAN) |
b4ee5a72 PB |
3953 | word |= (1 << (set_word_size - 1 - bit_pos)); |
3954 | else | |
3955 | word |= 1 << bit_pos; | |
3956 | } | |
3957 | bit_pos++; ibit++; | |
3958 | if (bit_pos >= set_word_size || ibit == nbits) | |
071a6595 | 3959 | { |
e1a43f73 PB |
3960 | if (word != 0 || ! cleared) |
3961 | { | |
3962 | rtx datum = GEN_INT (word); | |
3963 | rtx to_rtx; | |
0f41302f MS |
3964 | /* The assumption here is that it is safe to use |
3965 | XEXP if the set is multi-word, but not if | |
3966 | it's single-word. */ | |
e1a43f73 PB |
3967 | if (GET_CODE (target) == MEM) |
3968 | { | |
3969 | to_rtx = plus_constant (XEXP (target, 0), offset); | |
3970 | to_rtx = change_address (target, mode, to_rtx); | |
3971 | } | |
3972 | else if (offset == 0) | |
3973 | to_rtx = target; | |
3974 | else | |
3975 | abort (); | |
3976 | emit_move_insn (to_rtx, datum); | |
3977 | } | |
b4ee5a72 PB |
3978 | if (ibit == nbits) |
3979 | break; | |
3980 | word = 0; | |
3981 | bit_pos = 0; | |
3982 | offset += set_word_size / BITS_PER_UNIT; | |
071a6595 PB |
3983 | } |
3984 | } | |
071a6595 | 3985 | } |
e1a43f73 PB |
3986 | else if (!cleared) |
3987 | { | |
0f41302f | 3988 | /* Don't bother clearing storage if the set is all ones. */ |
e1a43f73 PB |
3989 | if (TREE_CHAIN (elt) != NULL_TREE |
3990 | || (TREE_PURPOSE (elt) == NULL_TREE | |
3991 | ? nbits != 1 | |
3992 | : (TREE_CODE (TREE_VALUE (elt)) != INTEGER_CST | |
3993 | || TREE_CODE (TREE_PURPOSE (elt)) != INTEGER_CST | |
3994 | || (TREE_INT_CST_LOW (TREE_VALUE (elt)) | |
3995 | - TREE_INT_CST_LOW (TREE_PURPOSE (elt)) + 1 | |
3996 | != nbits)))) | |
3997 | clear_storage (target, expr_size (exp), | |
3998 | TYPE_ALIGN (type) / BITS_PER_UNIT); | |
3999 | } | |
4000 | ||
4001 | for (; elt != NULL_TREE; elt = TREE_CHAIN (elt)) | |
071a6595 PB |
4002 | { |
4003 | /* start of range of element or NULL */ | |
4004 | tree startbit = TREE_PURPOSE (elt); | |
4005 | /* end of range of element, or element value */ | |
4006 | tree endbit = TREE_VALUE (elt); | |
381127e8 | 4007 | #ifdef TARGET_MEM_FUNCTIONS |
071a6595 | 4008 | HOST_WIDE_INT startb, endb; |
381127e8 | 4009 | #endif |
071a6595 PB |
4010 | rtx bitlength_rtx, startbit_rtx, endbit_rtx, targetx; |
4011 | ||
4012 | bitlength_rtx = expand_expr (bitlength, | |
4013 | NULL_RTX, MEM, EXPAND_CONST_ADDRESS); | |
4014 | ||
4015 | /* handle non-range tuple element like [ expr ] */ | |
4016 | if (startbit == NULL_TREE) | |
4017 | { | |
4018 | startbit = save_expr (endbit); | |
4019 | endbit = startbit; | |
4020 | } | |
4021 | startbit = convert (sizetype, startbit); | |
4022 | endbit = convert (sizetype, endbit); | |
4023 | if (! integer_zerop (domain_min)) | |
4024 | { | |
4025 | startbit = size_binop (MINUS_EXPR, startbit, domain_min); | |
4026 | endbit = size_binop (MINUS_EXPR, endbit, domain_min); | |
4027 | } | |
4028 | startbit_rtx = expand_expr (startbit, NULL_RTX, MEM, | |
4029 | EXPAND_CONST_ADDRESS); | |
4030 | endbit_rtx = expand_expr (endbit, NULL_RTX, MEM, | |
4031 | EXPAND_CONST_ADDRESS); | |
4032 | ||
4033 | if (REG_P (target)) | |
4034 | { | |
4035 | targetx = assign_stack_temp (GET_MODE (target), | |
4036 | GET_MODE_SIZE (GET_MODE (target)), | |
4037 | 0); | |
4038 | emit_move_insn (targetx, target); | |
4039 | } | |
4040 | else if (GET_CODE (target) == MEM) | |
4041 | targetx = target; | |
4042 | else | |
4043 | abort (); | |
4044 | ||
4045 | #ifdef TARGET_MEM_FUNCTIONS | |
4046 | /* Optimization: If startbit and endbit are | |
9faa82d8 | 4047 | constants divisible by BITS_PER_UNIT, |
0f41302f | 4048 | call memset instead. */ |
071a6595 PB |
4049 | if (TREE_CODE (startbit) == INTEGER_CST |
4050 | && TREE_CODE (endbit) == INTEGER_CST | |
4051 | && (startb = TREE_INT_CST_LOW (startbit)) % BITS_PER_UNIT == 0 | |
e1a43f73 | 4052 | && (endb = TREE_INT_CST_LOW (endbit) + 1) % BITS_PER_UNIT == 0) |
071a6595 | 4053 | { |
071a6595 PB |
4054 | emit_library_call (memset_libfunc, 0, |
4055 | VOIDmode, 3, | |
e1a43f73 PB |
4056 | plus_constant (XEXP (targetx, 0), |
4057 | startb / BITS_PER_UNIT), | |
071a6595 | 4058 | Pmode, |
3b6f75e2 | 4059 | constm1_rtx, TYPE_MODE (integer_type_node), |
071a6595 | 4060 | GEN_INT ((endb - startb) / BITS_PER_UNIT), |
3b6f75e2 | 4061 | TYPE_MODE (sizetype)); |
071a6595 PB |
4062 | } |
4063 | else | |
4064 | #endif | |
4065 | { | |
38a448ca | 4066 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__setbits"), |
071a6595 PB |
4067 | 0, VOIDmode, 4, XEXP (targetx, 0), Pmode, |
4068 | bitlength_rtx, TYPE_MODE (sizetype), | |
4069 | startbit_rtx, TYPE_MODE (sizetype), | |
4070 | endbit_rtx, TYPE_MODE (sizetype)); | |
4071 | } | |
4072 | if (REG_P (target)) | |
4073 | emit_move_insn (target, targetx); | |
4074 | } | |
4075 | } | |
bbf6f052 RK |
4076 | |
4077 | else | |
4078 | abort (); | |
4079 | } | |
4080 | ||
4081 | /* Store the value of EXP (an expression tree) | |
4082 | into a subfield of TARGET which has mode MODE and occupies | |
4083 | BITSIZE bits, starting BITPOS bits from the start of TARGET. | |
4084 | If MODE is VOIDmode, it means that we are storing into a bit-field. | |
4085 | ||
4086 | If VALUE_MODE is VOIDmode, return nothing in particular. | |
4087 | UNSIGNEDP is not used in this case. | |
4088 | ||
4089 | Otherwise, return an rtx for the value stored. This rtx | |
4090 | has mode VALUE_MODE if that is convenient to do. | |
4091 | In this case, UNSIGNEDP must be nonzero if the value is an unsigned type. | |
4092 | ||
4093 | ALIGN is the alignment that TARGET is known to have, measured in bytes. | |
4094 | TOTAL_SIZE is the size in bytes of the structure, or -1 if varying. */ | |
4095 | ||
4096 | static rtx | |
4097 | store_field (target, bitsize, bitpos, mode, exp, value_mode, | |
4098 | unsignedp, align, total_size) | |
4099 | rtx target; | |
4100 | int bitsize, bitpos; | |
4101 | enum machine_mode mode; | |
4102 | tree exp; | |
4103 | enum machine_mode value_mode; | |
4104 | int unsignedp; | |
4105 | int align; | |
4106 | int total_size; | |
4107 | { | |
906c4e36 | 4108 | HOST_WIDE_INT width_mask = 0; |
bbf6f052 | 4109 | |
e9a25f70 JL |
4110 | if (TREE_CODE (exp) == ERROR_MARK) |
4111 | return const0_rtx; | |
4112 | ||
906c4e36 RK |
4113 | if (bitsize < HOST_BITS_PER_WIDE_INT) |
4114 | width_mask = ((HOST_WIDE_INT) 1 << bitsize) - 1; | |
bbf6f052 RK |
4115 | |
4116 | /* If we are storing into an unaligned field of an aligned union that is | |
4117 | in a register, we may have the mode of TARGET being an integer mode but | |
4118 | MODE == BLKmode. In that case, get an aligned object whose size and | |
4119 | alignment are the same as TARGET and store TARGET into it (we can avoid | |
4120 | the store if the field being stored is the entire width of TARGET). Then | |
4121 | call ourselves recursively to store the field into a BLKmode version of | |
4122 | that object. Finally, load from the object into TARGET. This is not | |
4123 | very efficient in general, but should only be slightly more expensive | |
4124 | than the otherwise-required unaligned accesses. Perhaps this can be | |
4125 | cleaned up later. */ | |
4126 | ||
4127 | if (mode == BLKmode | |
4128 | && (GET_CODE (target) == REG || GET_CODE (target) == SUBREG)) | |
4129 | { | |
4130 | rtx object = assign_stack_temp (GET_MODE (target), | |
4131 | GET_MODE_SIZE (GET_MODE (target)), 0); | |
4132 | rtx blk_object = copy_rtx (object); | |
4133 | ||
24a13950 JW |
4134 | MEM_IN_STRUCT_P (object) = 1; |
4135 | MEM_IN_STRUCT_P (blk_object) = 1; | |
bbf6f052 RK |
4136 | PUT_MODE (blk_object, BLKmode); |
4137 | ||
4138 | if (bitsize != GET_MODE_BITSIZE (GET_MODE (target))) | |
4139 | emit_move_insn (object, target); | |
4140 | ||
4141 | store_field (blk_object, bitsize, bitpos, mode, exp, VOIDmode, 0, | |
4142 | align, total_size); | |
4143 | ||
46093b97 RS |
4144 | /* Even though we aren't returning target, we need to |
4145 | give it the updated value. */ | |
bbf6f052 RK |
4146 | emit_move_insn (target, object); |
4147 | ||
46093b97 | 4148 | return blk_object; |
bbf6f052 RK |
4149 | } |
4150 | ||
4151 | /* If the structure is in a register or if the component | |
4152 | is a bit field, we cannot use addressing to access it. | |
4153 | Use bit-field techniques or SUBREG to store in it. */ | |
4154 | ||
4fa52007 RK |
4155 | if (mode == VOIDmode |
4156 | || (mode != BLKmode && ! direct_store[(int) mode]) | |
4157 | || GET_CODE (target) == REG | |
c980ac49 | 4158 | || GET_CODE (target) == SUBREG |
ccc98036 RS |
4159 | /* If the field isn't aligned enough to store as an ordinary memref, |
4160 | store it as a bit field. */ | |
c7a7ac46 | 4161 | || (SLOW_UNALIGNED_ACCESS |
ccc98036 | 4162 | && align * BITS_PER_UNIT < GET_MODE_ALIGNMENT (mode)) |
c7a7ac46 | 4163 | || (SLOW_UNALIGNED_ACCESS && bitpos % GET_MODE_ALIGNMENT (mode) != 0)) |
bbf6f052 | 4164 | { |
906c4e36 | 4165 | rtx temp = expand_expr (exp, NULL_RTX, VOIDmode, 0); |
bbd6cf73 | 4166 | |
ef19912d RK |
4167 | /* If BITSIZE is narrower than the size of the type of EXP |
4168 | we will be narrowing TEMP. Normally, what's wanted are the | |
4169 | low-order bits. However, if EXP's type is a record and this is | |
4170 | big-endian machine, we want the upper BITSIZE bits. */ | |
4171 | if (BYTES_BIG_ENDIAN && GET_MODE_CLASS (GET_MODE (temp)) == MODE_INT | |
4172 | && bitsize < GET_MODE_BITSIZE (GET_MODE (temp)) | |
4173 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE) | |
4174 | temp = expand_shift (RSHIFT_EXPR, GET_MODE (temp), temp, | |
4175 | size_int (GET_MODE_BITSIZE (GET_MODE (temp)) | |
4176 | - bitsize), | |
4177 | temp, 1); | |
4178 | ||
bbd6cf73 RK |
4179 | /* Unless MODE is VOIDmode or BLKmode, convert TEMP to |
4180 | MODE. */ | |
4181 | if (mode != VOIDmode && mode != BLKmode | |
4182 | && mode != TYPE_MODE (TREE_TYPE (exp))) | |
4183 | temp = convert_modes (mode, TYPE_MODE (TREE_TYPE (exp)), temp, 1); | |
4184 | ||
a281e72d RK |
4185 | /* If the modes of TARGET and TEMP are both BLKmode, both |
4186 | must be in memory and BITPOS must be aligned on a byte | |
4187 | boundary. If so, we simply do a block copy. */ | |
4188 | if (GET_MODE (target) == BLKmode && GET_MODE (temp) == BLKmode) | |
4189 | { | |
4190 | if (GET_CODE (target) != MEM || GET_CODE (temp) != MEM | |
4191 | || bitpos % BITS_PER_UNIT != 0) | |
4192 | abort (); | |
4193 | ||
0086427c RK |
4194 | target = change_address (target, VOIDmode, |
4195 | plus_constant (XEXP (target, 0), | |
a281e72d RK |
4196 | bitpos / BITS_PER_UNIT)); |
4197 | ||
4198 | emit_block_move (target, temp, | |
4199 | GEN_INT ((bitsize + BITS_PER_UNIT - 1) | |
4200 | / BITS_PER_UNIT), | |
4201 | 1); | |
4202 | ||
4203 | return value_mode == VOIDmode ? const0_rtx : target; | |
4204 | } | |
4205 | ||
bbf6f052 RK |
4206 | /* Store the value in the bitfield. */ |
4207 | store_bit_field (target, bitsize, bitpos, mode, temp, align, total_size); | |
4208 | if (value_mode != VOIDmode) | |
4209 | { | |
4210 | /* The caller wants an rtx for the value. */ | |
4211 | /* If possible, avoid refetching from the bitfield itself. */ | |
4212 | if (width_mask != 0 | |
4213 | && ! (GET_CODE (target) == MEM && MEM_VOLATILE_P (target))) | |
5c4d7cfb | 4214 | { |
9074de27 | 4215 | tree count; |
5c4d7cfb | 4216 | enum machine_mode tmode; |
86a2c12a | 4217 | |
5c4d7cfb RS |
4218 | if (unsignedp) |
4219 | return expand_and (temp, GEN_INT (width_mask), NULL_RTX); | |
4220 | tmode = GET_MODE (temp); | |
86a2c12a RS |
4221 | if (tmode == VOIDmode) |
4222 | tmode = value_mode; | |
5c4d7cfb RS |
4223 | count = build_int_2 (GET_MODE_BITSIZE (tmode) - bitsize, 0); |
4224 | temp = expand_shift (LSHIFT_EXPR, tmode, temp, count, 0, 0); | |
4225 | return expand_shift (RSHIFT_EXPR, tmode, temp, count, 0, 0); | |
4226 | } | |
bbf6f052 | 4227 | return extract_bit_field (target, bitsize, bitpos, unsignedp, |
906c4e36 RK |
4228 | NULL_RTX, value_mode, 0, align, |
4229 | total_size); | |
bbf6f052 RK |
4230 | } |
4231 | return const0_rtx; | |
4232 | } | |
4233 | else | |
4234 | { | |
4235 | rtx addr = XEXP (target, 0); | |
4236 | rtx to_rtx; | |
4237 | ||
4238 | /* If a value is wanted, it must be the lhs; | |
4239 | so make the address stable for multiple use. */ | |
4240 | ||
4241 | if (value_mode != VOIDmode && GET_CODE (addr) != REG | |
4242 | && ! CONSTANT_ADDRESS_P (addr) | |
4243 | /* A frame-pointer reference is already stable. */ | |
4244 | && ! (GET_CODE (addr) == PLUS | |
4245 | && GET_CODE (XEXP (addr, 1)) == CONST_INT | |
4246 | && (XEXP (addr, 0) == virtual_incoming_args_rtx | |
4247 | || XEXP (addr, 0) == virtual_stack_vars_rtx))) | |
4248 | addr = copy_to_reg (addr); | |
4249 | ||
4250 | /* Now build a reference to just the desired component. */ | |
4251 | ||
effbcc6a RK |
4252 | to_rtx = copy_rtx (change_address (target, mode, |
4253 | plus_constant (addr, | |
4254 | (bitpos | |
4255 | / BITS_PER_UNIT)))); | |
bbf6f052 RK |
4256 | MEM_IN_STRUCT_P (to_rtx) = 1; |
4257 | ||
4258 | return store_expr (exp, to_rtx, value_mode != VOIDmode); | |
4259 | } | |
4260 | } | |
4261 | \f | |
4262 | /* Given an expression EXP that may be a COMPONENT_REF, a BIT_FIELD_REF, | |
4263 | or an ARRAY_REF, look for nested COMPONENT_REFs, BIT_FIELD_REFs, or | |
742920c7 | 4264 | ARRAY_REFs and find the ultimate containing object, which we return. |
bbf6f052 RK |
4265 | |
4266 | We set *PBITSIZE to the size in bits that we want, *PBITPOS to the | |
4267 | bit position, and *PUNSIGNEDP to the signedness of the field. | |
7bb0943f RS |
4268 | If the position of the field is variable, we store a tree |
4269 | giving the variable offset (in units) in *POFFSET. | |
4270 | This offset is in addition to the bit position. | |
4271 | If the position is not variable, we store 0 in *POFFSET. | |
839c4796 RK |
4272 | We set *PALIGNMENT to the alignment in bytes of the address that will be |
4273 | computed. This is the alignment of the thing we return if *POFFSET | |
4274 | is zero, but can be more less strictly aligned if *POFFSET is nonzero. | |
bbf6f052 RK |
4275 | |
4276 | If any of the extraction expressions is volatile, | |
4277 | we store 1 in *PVOLATILEP. Otherwise we don't change that. | |
4278 | ||
4279 | If the field is a bit-field, *PMODE is set to VOIDmode. Otherwise, it | |
4280 | is a mode that can be used to access the field. In that case, *PBITSIZE | |
e7c33f54 RK |
4281 | is redundant. |
4282 | ||
4283 | If the field describes a variable-sized object, *PMODE is set to | |
4284 | VOIDmode and *PBITSIZE is set to -1. An access cannot be made in | |
839c4796 | 4285 | this case, but the address of the object can be found. */ |
bbf6f052 RK |
4286 | |
4287 | tree | |
4969d05d | 4288 | get_inner_reference (exp, pbitsize, pbitpos, poffset, pmode, |
839c4796 | 4289 | punsignedp, pvolatilep, palignment) |
bbf6f052 RK |
4290 | tree exp; |
4291 | int *pbitsize; | |
4292 | int *pbitpos; | |
7bb0943f | 4293 | tree *poffset; |
bbf6f052 RK |
4294 | enum machine_mode *pmode; |
4295 | int *punsignedp; | |
4296 | int *pvolatilep; | |
839c4796 | 4297 | int *palignment; |
bbf6f052 | 4298 | { |
b50d17a1 | 4299 | tree orig_exp = exp; |
bbf6f052 RK |
4300 | tree size_tree = 0; |
4301 | enum machine_mode mode = VOIDmode; | |
742920c7 | 4302 | tree offset = integer_zero_node; |
839c4796 | 4303 | int alignment = BIGGEST_ALIGNMENT; |
bbf6f052 RK |
4304 | |
4305 | if (TREE_CODE (exp) == COMPONENT_REF) | |
4306 | { | |
4307 | size_tree = DECL_SIZE (TREE_OPERAND (exp, 1)); | |
4308 | if (! DECL_BIT_FIELD (TREE_OPERAND (exp, 1))) | |
4309 | mode = DECL_MODE (TREE_OPERAND (exp, 1)); | |
4310 | *punsignedp = TREE_UNSIGNED (TREE_OPERAND (exp, 1)); | |
4311 | } | |
4312 | else if (TREE_CODE (exp) == BIT_FIELD_REF) | |
4313 | { | |
4314 | size_tree = TREE_OPERAND (exp, 1); | |
4315 | *punsignedp = TREE_UNSIGNED (exp); | |
4316 | } | |
4317 | else | |
4318 | { | |
4319 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
4320 | *pbitsize = GET_MODE_BITSIZE (mode); | |
4321 | *punsignedp = TREE_UNSIGNED (TREE_TYPE (exp)); | |
4322 | } | |
4323 | ||
4324 | if (size_tree) | |
4325 | { | |
4326 | if (TREE_CODE (size_tree) != INTEGER_CST) | |
e7c33f54 RK |
4327 | mode = BLKmode, *pbitsize = -1; |
4328 | else | |
4329 | *pbitsize = TREE_INT_CST_LOW (size_tree); | |
bbf6f052 RK |
4330 | } |
4331 | ||
4332 | /* Compute cumulative bit-offset for nested component-refs and array-refs, | |
4333 | and find the ultimate containing object. */ | |
4334 | ||
4335 | *pbitpos = 0; | |
4336 | ||
4337 | while (1) | |
4338 | { | |
7bb0943f | 4339 | if (TREE_CODE (exp) == COMPONENT_REF || TREE_CODE (exp) == BIT_FIELD_REF) |
bbf6f052 | 4340 | { |
7bb0943f RS |
4341 | tree pos = (TREE_CODE (exp) == COMPONENT_REF |
4342 | ? DECL_FIELD_BITPOS (TREE_OPERAND (exp, 1)) | |
4343 | : TREE_OPERAND (exp, 2)); | |
e6d8c385 | 4344 | tree constant = integer_zero_node, var = pos; |
bbf6f052 | 4345 | |
e7f3c83f RK |
4346 | /* If this field hasn't been filled in yet, don't go |
4347 | past it. This should only happen when folding expressions | |
4348 | made during type construction. */ | |
4349 | if (pos == 0) | |
4350 | break; | |
4351 | ||
e6d8c385 RK |
4352 | /* Assume here that the offset is a multiple of a unit. |
4353 | If not, there should be an explicitly added constant. */ | |
4354 | if (TREE_CODE (pos) == PLUS_EXPR | |
4355 | && TREE_CODE (TREE_OPERAND (pos, 1)) == INTEGER_CST) | |
4356 | constant = TREE_OPERAND (pos, 1), var = TREE_OPERAND (pos, 0); | |
7bb0943f | 4357 | else if (TREE_CODE (pos) == INTEGER_CST) |
e6d8c385 RK |
4358 | constant = pos, var = integer_zero_node; |
4359 | ||
4360 | *pbitpos += TREE_INT_CST_LOW (constant); | |
8d8c9ba9 RK |
4361 | offset = size_binop (PLUS_EXPR, offset, |
4362 | size_binop (EXACT_DIV_EXPR, var, | |
4363 | size_int (BITS_PER_UNIT))); | |
bbf6f052 | 4364 | } |
bbf6f052 | 4365 | |
742920c7 | 4366 | else if (TREE_CODE (exp) == ARRAY_REF) |
bbf6f052 | 4367 | { |
742920c7 RK |
4368 | /* This code is based on the code in case ARRAY_REF in expand_expr |
4369 | below. We assume here that the size of an array element is | |
4370 | always an integral multiple of BITS_PER_UNIT. */ | |
4371 | ||
4372 | tree index = TREE_OPERAND (exp, 1); | |
4373 | tree domain = TYPE_DOMAIN (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
4374 | tree low_bound | |
4375 | = domain ? TYPE_MIN_VALUE (domain) : integer_zero_node; | |
4376 | tree index_type = TREE_TYPE (index); | |
4377 | ||
4c08eef0 | 4378 | if (TYPE_PRECISION (index_type) != TYPE_PRECISION (sizetype)) |
742920c7 | 4379 | { |
4c08eef0 RK |
4380 | index = convert (type_for_size (TYPE_PRECISION (sizetype), 0), |
4381 | index); | |
742920c7 RK |
4382 | index_type = TREE_TYPE (index); |
4383 | } | |
4384 | ||
ca0f2220 RH |
4385 | if (! integer_zerop (low_bound)) |
4386 | index = fold (build (MINUS_EXPR, index_type, index, low_bound)); | |
4387 | ||
f8dac6eb R |
4388 | if (TREE_CODE (index) == INTEGER_CST) |
4389 | { | |
4390 | index = convert (sbitsizetype, index); | |
4391 | index_type = TREE_TYPE (index); | |
4392 | } | |
4393 | ||
4394 | index = fold (build (MULT_EXPR, sbitsizetype, index, | |
4395 | convert (sbitsizetype, | |
0d15e60c | 4396 | TYPE_SIZE (TREE_TYPE (exp))))); |
742920c7 RK |
4397 | |
4398 | if (TREE_CODE (index) == INTEGER_CST | |
4399 | && TREE_INT_CST_HIGH (index) == 0) | |
4400 | *pbitpos += TREE_INT_CST_LOW (index); | |
4401 | else | |
956d6950 | 4402 | { |
e5e809f4 JL |
4403 | if (contains_placeholder_p (index)) |
4404 | index = build (WITH_RECORD_EXPR, sizetype, index, exp); | |
4405 | ||
956d6950 | 4406 | offset = size_binop (PLUS_EXPR, offset, |
e5e809f4 JL |
4407 | size_binop (FLOOR_DIV_EXPR, index, |
4408 | size_int (BITS_PER_UNIT))); | |
956d6950 | 4409 | } |
bbf6f052 RK |
4410 | } |
4411 | else if (TREE_CODE (exp) != NON_LVALUE_EXPR | |
4412 | && ! ((TREE_CODE (exp) == NOP_EXPR | |
4413 | || TREE_CODE (exp) == CONVERT_EXPR) | |
7f62854a RK |
4414 | && ! (TREE_CODE (TREE_TYPE (exp)) == UNION_TYPE |
4415 | && (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) | |
4416 | != UNION_TYPE)) | |
bbf6f052 RK |
4417 | && (TYPE_MODE (TREE_TYPE (exp)) |
4418 | == TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))))) | |
4419 | break; | |
7bb0943f RS |
4420 | |
4421 | /* If any reference in the chain is volatile, the effect is volatile. */ | |
4422 | if (TREE_THIS_VOLATILE (exp)) | |
4423 | *pvolatilep = 1; | |
839c4796 RK |
4424 | |
4425 | /* If the offset is non-constant already, then we can't assume any | |
4426 | alignment more than the alignment here. */ | |
4427 | if (! integer_zerop (offset)) | |
4428 | alignment = MIN (alignment, TYPE_ALIGN (TREE_TYPE (exp))); | |
4429 | ||
bbf6f052 RK |
4430 | exp = TREE_OPERAND (exp, 0); |
4431 | } | |
4432 | ||
839c4796 RK |
4433 | if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd') |
4434 | alignment = MIN (alignment, DECL_ALIGN (exp)); | |
9293498f | 4435 | else if (TREE_TYPE (exp) != 0) |
839c4796 RK |
4436 | alignment = MIN (alignment, TYPE_ALIGN (TREE_TYPE (exp))); |
4437 | ||
742920c7 RK |
4438 | if (integer_zerop (offset)) |
4439 | offset = 0; | |
4440 | ||
b50d17a1 RK |
4441 | if (offset != 0 && contains_placeholder_p (offset)) |
4442 | offset = build (WITH_RECORD_EXPR, sizetype, offset, orig_exp); | |
4443 | ||
bbf6f052 | 4444 | *pmode = mode; |
7bb0943f | 4445 | *poffset = offset; |
839c4796 | 4446 | *palignment = alignment / BITS_PER_UNIT; |
bbf6f052 RK |
4447 | return exp; |
4448 | } | |
921b3427 RK |
4449 | |
4450 | /* Subroutine of expand_exp: compute memory_usage from modifier. */ | |
4451 | static enum memory_use_mode | |
4452 | get_memory_usage_from_modifier (modifier) | |
4453 | enum expand_modifier modifier; | |
4454 | { | |
4455 | switch (modifier) | |
4456 | { | |
4457 | case EXPAND_NORMAL: | |
e5e809f4 | 4458 | case EXPAND_SUM: |
921b3427 RK |
4459 | return MEMORY_USE_RO; |
4460 | break; | |
4461 | case EXPAND_MEMORY_USE_WO: | |
4462 | return MEMORY_USE_WO; | |
4463 | break; | |
4464 | case EXPAND_MEMORY_USE_RW: | |
4465 | return MEMORY_USE_RW; | |
4466 | break; | |
921b3427 | 4467 | case EXPAND_MEMORY_USE_DONT: |
e5e809f4 JL |
4468 | /* EXPAND_CONST_ADDRESS and EXPAND_INITIALIZER are converted into |
4469 | MEMORY_USE_DONT, because they are modifiers to a call of | |
4470 | expand_expr in the ADDR_EXPR case of expand_expr. */ | |
921b3427 | 4471 | case EXPAND_CONST_ADDRESS: |
e5e809f4 | 4472 | case EXPAND_INITIALIZER: |
921b3427 RK |
4473 | return MEMORY_USE_DONT; |
4474 | case EXPAND_MEMORY_USE_BAD: | |
4475 | default: | |
4476 | abort (); | |
4477 | } | |
4478 | } | |
bbf6f052 RK |
4479 | \f |
4480 | /* Given an rtx VALUE that may contain additions and multiplications, | |
4481 | return an equivalent value that just refers to a register or memory. | |
4482 | This is done by generating instructions to perform the arithmetic | |
c45a13a6 RK |
4483 | and returning a pseudo-register containing the value. |
4484 | ||
4485 | The returned value may be a REG, SUBREG, MEM or constant. */ | |
bbf6f052 RK |
4486 | |
4487 | rtx | |
4488 | force_operand (value, target) | |
4489 | rtx value, target; | |
4490 | { | |
4491 | register optab binoptab = 0; | |
4492 | /* Use a temporary to force order of execution of calls to | |
4493 | `force_operand'. */ | |
4494 | rtx tmp; | |
4495 | register rtx op2; | |
4496 | /* Use subtarget as the target for operand 0 of a binary operation. */ | |
4497 | register rtx subtarget = (target != 0 && GET_CODE (target) == REG ? target : 0); | |
4498 | ||
4499 | if (GET_CODE (value) == PLUS) | |
4500 | binoptab = add_optab; | |
4501 | else if (GET_CODE (value) == MINUS) | |
4502 | binoptab = sub_optab; | |
4503 | else if (GET_CODE (value) == MULT) | |
4504 | { | |
4505 | op2 = XEXP (value, 1); | |
4506 | if (!CONSTANT_P (op2) | |
4507 | && !(GET_CODE (op2) == REG && op2 != subtarget)) | |
4508 | subtarget = 0; | |
4509 | tmp = force_operand (XEXP (value, 0), subtarget); | |
4510 | return expand_mult (GET_MODE (value), tmp, | |
906c4e36 | 4511 | force_operand (op2, NULL_RTX), |
bbf6f052 RK |
4512 | target, 0); |
4513 | } | |
4514 | ||
4515 | if (binoptab) | |
4516 | { | |
4517 | op2 = XEXP (value, 1); | |
4518 | if (!CONSTANT_P (op2) | |
4519 | && !(GET_CODE (op2) == REG && op2 != subtarget)) | |
4520 | subtarget = 0; | |
4521 | if (binoptab == sub_optab && GET_CODE (op2) == CONST_INT) | |
4522 | { | |
4523 | binoptab = add_optab; | |
4524 | op2 = negate_rtx (GET_MODE (value), op2); | |
4525 | } | |
4526 | ||
4527 | /* Check for an addition with OP2 a constant integer and our first | |
4528 | operand a PLUS of a virtual register and something else. In that | |
4529 | case, we want to emit the sum of the virtual register and the | |
4530 | constant first and then add the other value. This allows virtual | |
4531 | register instantiation to simply modify the constant rather than | |
4532 | creating another one around this addition. */ | |
4533 | if (binoptab == add_optab && GET_CODE (op2) == CONST_INT | |
4534 | && GET_CODE (XEXP (value, 0)) == PLUS | |
4535 | && GET_CODE (XEXP (XEXP (value, 0), 0)) == REG | |
4536 | && REGNO (XEXP (XEXP (value, 0), 0)) >= FIRST_VIRTUAL_REGISTER | |
4537 | && REGNO (XEXP (XEXP (value, 0), 0)) <= LAST_VIRTUAL_REGISTER) | |
4538 | { | |
4539 | rtx temp = expand_binop (GET_MODE (value), binoptab, | |
4540 | XEXP (XEXP (value, 0), 0), op2, | |
4541 | subtarget, 0, OPTAB_LIB_WIDEN); | |
4542 | return expand_binop (GET_MODE (value), binoptab, temp, | |
4543 | force_operand (XEXP (XEXP (value, 0), 1), 0), | |
4544 | target, 0, OPTAB_LIB_WIDEN); | |
4545 | } | |
4546 | ||
4547 | tmp = force_operand (XEXP (value, 0), subtarget); | |
4548 | return expand_binop (GET_MODE (value), binoptab, tmp, | |
906c4e36 | 4549 | force_operand (op2, NULL_RTX), |
bbf6f052 | 4550 | target, 0, OPTAB_LIB_WIDEN); |
8008b228 | 4551 | /* We give UNSIGNEDP = 0 to expand_binop |
bbf6f052 RK |
4552 | because the only operations we are expanding here are signed ones. */ |
4553 | } | |
4554 | return value; | |
4555 | } | |
4556 | \f | |
4557 | /* Subroutine of expand_expr: | |
4558 | save the non-copied parts (LIST) of an expr (LHS), and return a list | |
4559 | which can restore these values to their previous values, | |
4560 | should something modify their storage. */ | |
4561 | ||
4562 | static tree | |
4563 | save_noncopied_parts (lhs, list) | |
4564 | tree lhs; | |
4565 | tree list; | |
4566 | { | |
4567 | tree tail; | |
4568 | tree parts = 0; | |
4569 | ||
4570 | for (tail = list; tail; tail = TREE_CHAIN (tail)) | |
4571 | if (TREE_CODE (TREE_VALUE (tail)) == TREE_LIST) | |
4572 | parts = chainon (parts, save_noncopied_parts (lhs, TREE_VALUE (tail))); | |
4573 | else | |
4574 | { | |
4575 | tree part = TREE_VALUE (tail); | |
4576 | tree part_type = TREE_TYPE (part); | |
906c4e36 | 4577 | tree to_be_saved = build (COMPONENT_REF, part_type, lhs, part); |
06089a8b | 4578 | rtx target = assign_temp (part_type, 0, 1, 1); |
bbf6f052 | 4579 | if (! memory_address_p (TYPE_MODE (part_type), XEXP (target, 0))) |
906c4e36 | 4580 | target = change_address (target, TYPE_MODE (part_type), NULL_RTX); |
bbf6f052 | 4581 | parts = tree_cons (to_be_saved, |
906c4e36 RK |
4582 | build (RTL_EXPR, part_type, NULL_TREE, |
4583 | (tree) target), | |
bbf6f052 RK |
4584 | parts); |
4585 | store_expr (TREE_PURPOSE (parts), RTL_EXPR_RTL (TREE_VALUE (parts)), 0); | |
4586 | } | |
4587 | return parts; | |
4588 | } | |
4589 | ||
4590 | /* Subroutine of expand_expr: | |
4591 | record the non-copied parts (LIST) of an expr (LHS), and return a list | |
4592 | which specifies the initial values of these parts. */ | |
4593 | ||
4594 | static tree | |
4595 | init_noncopied_parts (lhs, list) | |
4596 | tree lhs; | |
4597 | tree list; | |
4598 | { | |
4599 | tree tail; | |
4600 | tree parts = 0; | |
4601 | ||
4602 | for (tail = list; tail; tail = TREE_CHAIN (tail)) | |
4603 | if (TREE_CODE (TREE_VALUE (tail)) == TREE_LIST) | |
4604 | parts = chainon (parts, init_noncopied_parts (lhs, TREE_VALUE (tail))); | |
4605 | else | |
4606 | { | |
4607 | tree part = TREE_VALUE (tail); | |
4608 | tree part_type = TREE_TYPE (part); | |
906c4e36 | 4609 | tree to_be_initialized = build (COMPONENT_REF, part_type, lhs, part); |
bbf6f052 RK |
4610 | parts = tree_cons (TREE_PURPOSE (tail), to_be_initialized, parts); |
4611 | } | |
4612 | return parts; | |
4613 | } | |
4614 | ||
4615 | /* Subroutine of expand_expr: return nonzero iff there is no way that | |
e5e809f4 JL |
4616 | EXP can reference X, which is being modified. TOP_P is nonzero if this |
4617 | call is going to be used to determine whether we need a temporary | |
4618 | for EXP, as opposed to a recursive call to this function. */ | |
bbf6f052 RK |
4619 | |
4620 | static int | |
e5e809f4 | 4621 | safe_from_p (x, exp, top_p) |
bbf6f052 RK |
4622 | rtx x; |
4623 | tree exp; | |
e5e809f4 | 4624 | int top_p; |
bbf6f052 RK |
4625 | { |
4626 | rtx exp_rtl = 0; | |
4627 | int i, nops; | |
4628 | ||
6676e72f RK |
4629 | if (x == 0 |
4630 | /* If EXP has varying size, we MUST use a target since we currently | |
8f6562d0 PB |
4631 | have no way of allocating temporaries of variable size |
4632 | (except for arrays that have TYPE_ARRAY_MAX_SIZE set). | |
4633 | So we assume here that something at a higher level has prevented a | |
f4510f37 | 4634 | clash. This is somewhat bogus, but the best we can do. Only |
e5e809f4 JL |
4635 | do this when X is BLKmode and when we are at the top level. */ |
4636 | || (top_p && TREE_TYPE (exp) != 0 && TYPE_SIZE (TREE_TYPE (exp)) != 0 | |
f4510f37 | 4637 | && TREE_CODE (TYPE_SIZE (TREE_TYPE (exp))) != INTEGER_CST |
8f6562d0 PB |
4638 | && (TREE_CODE (TREE_TYPE (exp)) != ARRAY_TYPE |
4639 | || TYPE_ARRAY_MAX_SIZE (TREE_TYPE (exp)) == NULL_TREE | |
4640 | || TREE_CODE (TYPE_ARRAY_MAX_SIZE (TREE_TYPE (exp))) | |
4641 | != INTEGER_CST) | |
f4510f37 | 4642 | && GET_MODE (x) == BLKmode)) |
bbf6f052 RK |
4643 | return 1; |
4644 | ||
4645 | /* If this is a subreg of a hard register, declare it unsafe, otherwise, | |
4646 | find the underlying pseudo. */ | |
4647 | if (GET_CODE (x) == SUBREG) | |
4648 | { | |
4649 | x = SUBREG_REG (x); | |
4650 | if (GET_CODE (x) == REG && REGNO (x) < FIRST_PSEUDO_REGISTER) | |
4651 | return 0; | |
4652 | } | |
4653 | ||
4654 | /* If X is a location in the outgoing argument area, it is always safe. */ | |
4655 | if (GET_CODE (x) == MEM | |
4656 | && (XEXP (x, 0) == virtual_outgoing_args_rtx | |
4657 | || (GET_CODE (XEXP (x, 0)) == PLUS | |
4658 | && XEXP (XEXP (x, 0), 0) == virtual_outgoing_args_rtx))) | |
4659 | return 1; | |
4660 | ||
4661 | switch (TREE_CODE_CLASS (TREE_CODE (exp))) | |
4662 | { | |
4663 | case 'd': | |
4664 | exp_rtl = DECL_RTL (exp); | |
4665 | break; | |
4666 | ||
4667 | case 'c': | |
4668 | return 1; | |
4669 | ||
4670 | case 'x': | |
4671 | if (TREE_CODE (exp) == TREE_LIST) | |
f32fd778 | 4672 | return ((TREE_VALUE (exp) == 0 |
e5e809f4 | 4673 | || safe_from_p (x, TREE_VALUE (exp), 0)) |
bbf6f052 | 4674 | && (TREE_CHAIN (exp) == 0 |
e5e809f4 | 4675 | || safe_from_p (x, TREE_CHAIN (exp), 0))); |
bbf6f052 RK |
4676 | else |
4677 | return 0; | |
4678 | ||
4679 | case '1': | |
e5e809f4 | 4680 | return safe_from_p (x, TREE_OPERAND (exp, 0), 0); |
bbf6f052 RK |
4681 | |
4682 | case '2': | |
4683 | case '<': | |
e5e809f4 JL |
4684 | return (safe_from_p (x, TREE_OPERAND (exp, 0), 0) |
4685 | && safe_from_p (x, TREE_OPERAND (exp, 1), 0)); | |
bbf6f052 RK |
4686 | |
4687 | case 'e': | |
4688 | case 'r': | |
4689 | /* Now do code-specific tests. EXP_RTL is set to any rtx we find in | |
4690 | the expression. If it is set, we conflict iff we are that rtx or | |
4691 | both are in memory. Otherwise, we check all operands of the | |
4692 | expression recursively. */ | |
4693 | ||
4694 | switch (TREE_CODE (exp)) | |
4695 | { | |
4696 | case ADDR_EXPR: | |
e44842fe | 4697 | return (staticp (TREE_OPERAND (exp, 0)) |
e5e809f4 JL |
4698 | || safe_from_p (x, TREE_OPERAND (exp, 0), 0) |
4699 | || TREE_STATIC (exp)); | |
bbf6f052 RK |
4700 | |
4701 | case INDIRECT_REF: | |
4702 | if (GET_CODE (x) == MEM) | |
4703 | return 0; | |
4704 | break; | |
4705 | ||
4706 | case CALL_EXPR: | |
4707 | exp_rtl = CALL_EXPR_RTL (exp); | |
4708 | if (exp_rtl == 0) | |
4709 | { | |
4710 | /* Assume that the call will clobber all hard registers and | |
4711 | all of memory. */ | |
4712 | if ((GET_CODE (x) == REG && REGNO (x) < FIRST_PSEUDO_REGISTER) | |
4713 | || GET_CODE (x) == MEM) | |
4714 | return 0; | |
4715 | } | |
4716 | ||
4717 | break; | |
4718 | ||
4719 | case RTL_EXPR: | |
3bb5826a RK |
4720 | /* If a sequence exists, we would have to scan every instruction |
4721 | in the sequence to see if it was safe. This is probably not | |
4722 | worthwhile. */ | |
4723 | if (RTL_EXPR_SEQUENCE (exp)) | |
bbf6f052 RK |
4724 | return 0; |
4725 | ||
3bb5826a | 4726 | exp_rtl = RTL_EXPR_RTL (exp); |
bbf6f052 RK |
4727 | break; |
4728 | ||
4729 | case WITH_CLEANUP_EXPR: | |
4730 | exp_rtl = RTL_EXPR_RTL (exp); | |
4731 | break; | |
4732 | ||
5dab5552 | 4733 | case CLEANUP_POINT_EXPR: |
e5e809f4 | 4734 | return safe_from_p (x, TREE_OPERAND (exp, 0), 0); |
5dab5552 | 4735 | |
bbf6f052 RK |
4736 | case SAVE_EXPR: |
4737 | exp_rtl = SAVE_EXPR_RTL (exp); | |
4738 | break; | |
4739 | ||
8129842c RS |
4740 | case BIND_EXPR: |
4741 | /* The only operand we look at is operand 1. The rest aren't | |
4742 | part of the expression. */ | |
e5e809f4 | 4743 | return safe_from_p (x, TREE_OPERAND (exp, 1), 0); |
8129842c | 4744 | |
bbf6f052 | 4745 | case METHOD_CALL_EXPR: |
0f41302f | 4746 | /* This takes a rtx argument, but shouldn't appear here. */ |
bbf6f052 | 4747 | abort (); |
e9a25f70 JL |
4748 | |
4749 | default: | |
4750 | break; | |
bbf6f052 RK |
4751 | } |
4752 | ||
4753 | /* If we have an rtx, we do not need to scan our operands. */ | |
4754 | if (exp_rtl) | |
4755 | break; | |
4756 | ||
4757 | nops = tree_code_length[(int) TREE_CODE (exp)]; | |
4758 | for (i = 0; i < nops; i++) | |
4759 | if (TREE_OPERAND (exp, i) != 0 | |
e5e809f4 | 4760 | && ! safe_from_p (x, TREE_OPERAND (exp, i), 0)) |
bbf6f052 RK |
4761 | return 0; |
4762 | } | |
4763 | ||
4764 | /* If we have an rtl, find any enclosed object. Then see if we conflict | |
4765 | with it. */ | |
4766 | if (exp_rtl) | |
4767 | { | |
4768 | if (GET_CODE (exp_rtl) == SUBREG) | |
4769 | { | |
4770 | exp_rtl = SUBREG_REG (exp_rtl); | |
4771 | if (GET_CODE (exp_rtl) == REG | |
4772 | && REGNO (exp_rtl) < FIRST_PSEUDO_REGISTER) | |
4773 | return 0; | |
4774 | } | |
4775 | ||
4776 | /* If the rtl is X, then it is not safe. Otherwise, it is unless both | |
4777 | are memory and EXP is not readonly. */ | |
4778 | return ! (rtx_equal_p (x, exp_rtl) | |
4779 | || (GET_CODE (x) == MEM && GET_CODE (exp_rtl) == MEM | |
4780 | && ! TREE_READONLY (exp))); | |
4781 | } | |
4782 | ||
4783 | /* If we reach here, it is safe. */ | |
4784 | return 1; | |
4785 | } | |
4786 | ||
4787 | /* Subroutine of expand_expr: return nonzero iff EXP is an | |
4788 | expression whose type is statically determinable. */ | |
4789 | ||
4790 | static int | |
4791 | fixed_type_p (exp) | |
4792 | tree exp; | |
4793 | { | |
4794 | if (TREE_CODE (exp) == PARM_DECL | |
4795 | || TREE_CODE (exp) == VAR_DECL | |
4796 | || TREE_CODE (exp) == CALL_EXPR || TREE_CODE (exp) == TARGET_EXPR | |
4797 | || TREE_CODE (exp) == COMPONENT_REF | |
4798 | || TREE_CODE (exp) == ARRAY_REF) | |
4799 | return 1; | |
4800 | return 0; | |
4801 | } | |
01c8a7c8 RK |
4802 | |
4803 | /* Subroutine of expand_expr: return rtx if EXP is a | |
4804 | variable or parameter; else return 0. */ | |
4805 | ||
4806 | static rtx | |
4807 | var_rtx (exp) | |
4808 | tree exp; | |
4809 | { | |
4810 | STRIP_NOPS (exp); | |
4811 | switch (TREE_CODE (exp)) | |
4812 | { | |
4813 | case PARM_DECL: | |
4814 | case VAR_DECL: | |
4815 | return DECL_RTL (exp); | |
4816 | default: | |
4817 | return 0; | |
4818 | } | |
4819 | } | |
bbf6f052 RK |
4820 | \f |
4821 | /* expand_expr: generate code for computing expression EXP. | |
4822 | An rtx for the computed value is returned. The value is never null. | |
4823 | In the case of a void EXP, const0_rtx is returned. | |
4824 | ||
4825 | The value may be stored in TARGET if TARGET is nonzero. | |
4826 | TARGET is just a suggestion; callers must assume that | |
4827 | the rtx returned may not be the same as TARGET. | |
4828 | ||
4829 | If TARGET is CONST0_RTX, it means that the value will be ignored. | |
4830 | ||
4831 | If TMODE is not VOIDmode, it suggests generating the | |
4832 | result in mode TMODE. But this is done only when convenient. | |
4833 | Otherwise, TMODE is ignored and the value generated in its natural mode. | |
4834 | TMODE is just a suggestion; callers must assume that | |
4835 | the rtx returned may not have mode TMODE. | |
4836 | ||
d6a5ac33 RK |
4837 | Note that TARGET may have neither TMODE nor MODE. In that case, it |
4838 | probably will not be used. | |
bbf6f052 RK |
4839 | |
4840 | If MODIFIER is EXPAND_SUM then when EXP is an addition | |
4841 | we can return an rtx of the form (MULT (REG ...) (CONST_INT ...)) | |
4842 | or a nest of (PLUS ...) and (MINUS ...) where the terms are | |
4843 | products as above, or REG or MEM, or constant. | |
4844 | Ordinarily in such cases we would output mul or add instructions | |
4845 | and then return a pseudo reg containing the sum. | |
4846 | ||
4847 | EXPAND_INITIALIZER is much like EXPAND_SUM except that | |
4848 | it also marks a label as absolutely required (it can't be dead). | |
26fcb35a | 4849 | It also makes a ZERO_EXTEND or SIGN_EXTEND instead of emitting extend insns. |
d6a5ac33 RK |
4850 | This is used for outputting expressions used in initializers. |
4851 | ||
4852 | EXPAND_CONST_ADDRESS says that it is okay to return a MEM | |
4853 | with a constant address even if that address is not normally legitimate. | |
4854 | EXPAND_INITIALIZER and EXPAND_SUM also have this effect. */ | |
bbf6f052 RK |
4855 | |
4856 | rtx | |
4857 | expand_expr (exp, target, tmode, modifier) | |
4858 | register tree exp; | |
4859 | rtx target; | |
4860 | enum machine_mode tmode; | |
4861 | enum expand_modifier modifier; | |
4862 | { | |
b50d17a1 RK |
4863 | /* Chain of pending expressions for PLACEHOLDER_EXPR to replace. |
4864 | This is static so it will be accessible to our recursive callees. */ | |
4865 | static tree placeholder_list = 0; | |
bbf6f052 RK |
4866 | register rtx op0, op1, temp; |
4867 | tree type = TREE_TYPE (exp); | |
4868 | int unsignedp = TREE_UNSIGNED (type); | |
4869 | register enum machine_mode mode = TYPE_MODE (type); | |
4870 | register enum tree_code code = TREE_CODE (exp); | |
4871 | optab this_optab; | |
4872 | /* Use subtarget as the target for operand 0 of a binary operation. */ | |
4873 | rtx subtarget = (target != 0 && GET_CODE (target) == REG ? target : 0); | |
4874 | rtx original_target = target; | |
dd27116b RK |
4875 | int ignore = (target == const0_rtx |
4876 | || ((code == NON_LVALUE_EXPR || code == NOP_EXPR | |
4d87de75 RS |
4877 | || code == CONVERT_EXPR || code == REFERENCE_EXPR |
4878 | || code == COND_EXPR) | |
dd27116b | 4879 | && TREE_CODE (type) == VOID_TYPE)); |
bbf6f052 | 4880 | tree context; |
921b3427 RK |
4881 | /* Used by check-memory-usage to make modifier read only. */ |
4882 | enum expand_modifier ro_modifier; | |
bbf6f052 | 4883 | |
921b3427 RK |
4884 | /* Make a read-only version of the modifier. */ |
4885 | if (modifier == EXPAND_NORMAL || modifier == EXPAND_SUM | |
4886 | || modifier == EXPAND_CONST_ADDRESS || modifier == EXPAND_INITIALIZER) | |
4887 | ro_modifier = modifier; | |
4888 | else | |
4889 | ro_modifier = EXPAND_NORMAL; | |
ca695ac9 | 4890 | |
bbf6f052 RK |
4891 | /* Don't use hard regs as subtargets, because the combiner |
4892 | can only handle pseudo regs. */ | |
4893 | if (subtarget && REGNO (subtarget) < FIRST_PSEUDO_REGISTER) | |
4894 | subtarget = 0; | |
4895 | /* Avoid subtargets inside loops, | |
4896 | since they hide some invariant expressions. */ | |
4897 | if (preserve_subexpressions_p ()) | |
4898 | subtarget = 0; | |
4899 | ||
dd27116b RK |
4900 | /* If we are going to ignore this result, we need only do something |
4901 | if there is a side-effect somewhere in the expression. If there | |
b50d17a1 RK |
4902 | is, short-circuit the most common cases here. Note that we must |
4903 | not call expand_expr with anything but const0_rtx in case this | |
4904 | is an initial expansion of a size that contains a PLACEHOLDER_EXPR. */ | |
bbf6f052 | 4905 | |
dd27116b RK |
4906 | if (ignore) |
4907 | { | |
4908 | if (! TREE_SIDE_EFFECTS (exp)) | |
4909 | return const0_rtx; | |
4910 | ||
4911 | /* Ensure we reference a volatile object even if value is ignored. */ | |
4912 | if (TREE_THIS_VOLATILE (exp) | |
4913 | && TREE_CODE (exp) != FUNCTION_DECL | |
4914 | && mode != VOIDmode && mode != BLKmode) | |
4915 | { | |
921b3427 | 4916 | temp = expand_expr (exp, NULL_RTX, VOIDmode, ro_modifier); |
dd27116b RK |
4917 | if (GET_CODE (temp) == MEM) |
4918 | temp = copy_to_reg (temp); | |
4919 | return const0_rtx; | |
4920 | } | |
4921 | ||
4922 | if (TREE_CODE_CLASS (code) == '1') | |
4923 | return expand_expr (TREE_OPERAND (exp, 0), const0_rtx, | |
921b3427 | 4924 | VOIDmode, ro_modifier); |
dd27116b RK |
4925 | else if (TREE_CODE_CLASS (code) == '2' |
4926 | || TREE_CODE_CLASS (code) == '<') | |
4927 | { | |
921b3427 RK |
4928 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, ro_modifier); |
4929 | expand_expr (TREE_OPERAND (exp, 1), const0_rtx, VOIDmode, ro_modifier); | |
dd27116b RK |
4930 | return const0_rtx; |
4931 | } | |
4932 | else if ((code == TRUTH_ANDIF_EXPR || code == TRUTH_ORIF_EXPR) | |
4933 | && ! TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 1))) | |
4934 | /* If the second operand has no side effects, just evaluate | |
0f41302f | 4935 | the first. */ |
dd27116b | 4936 | return expand_expr (TREE_OPERAND (exp, 0), const0_rtx, |
921b3427 | 4937 | VOIDmode, ro_modifier); |
dd27116b | 4938 | |
90764a87 | 4939 | target = 0; |
dd27116b | 4940 | } |
bbf6f052 | 4941 | |
e44842fe RK |
4942 | /* If will do cse, generate all results into pseudo registers |
4943 | since 1) that allows cse to find more things | |
4944 | and 2) otherwise cse could produce an insn the machine | |
4945 | cannot support. */ | |
4946 | ||
bbf6f052 RK |
4947 | if (! cse_not_expected && mode != BLKmode && target |
4948 | && (GET_CODE (target) != REG || REGNO (target) < FIRST_PSEUDO_REGISTER)) | |
4949 | target = subtarget; | |
4950 | ||
bbf6f052 RK |
4951 | switch (code) |
4952 | { | |
4953 | case LABEL_DECL: | |
b552441b RS |
4954 | { |
4955 | tree function = decl_function_context (exp); | |
4956 | /* Handle using a label in a containing function. */ | |
d0977240 RK |
4957 | if (function != current_function_decl |
4958 | && function != inline_function_decl && function != 0) | |
b552441b RS |
4959 | { |
4960 | struct function *p = find_function_data (function); | |
4961 | /* Allocate in the memory associated with the function | |
4962 | that the label is in. */ | |
4963 | push_obstacks (p->function_obstack, | |
4964 | p->function_maybepermanent_obstack); | |
4965 | ||
38a448ca RH |
4966 | p->forced_labels = gen_rtx_EXPR_LIST (VOIDmode, |
4967 | label_rtx (exp), | |
4968 | p->forced_labels); | |
b552441b RS |
4969 | pop_obstacks (); |
4970 | } | |
4971 | else if (modifier == EXPAND_INITIALIZER) | |
38a448ca RH |
4972 | forced_labels = gen_rtx_EXPR_LIST (VOIDmode, |
4973 | label_rtx (exp), forced_labels); | |
4974 | temp = gen_rtx_MEM (FUNCTION_MODE, | |
4975 | gen_rtx_LABEL_REF (Pmode, label_rtx (exp))); | |
d0977240 RK |
4976 | if (function != current_function_decl |
4977 | && function != inline_function_decl && function != 0) | |
26fcb35a RS |
4978 | LABEL_REF_NONLOCAL_P (XEXP (temp, 0)) = 1; |
4979 | return temp; | |
b552441b | 4980 | } |
bbf6f052 RK |
4981 | |
4982 | case PARM_DECL: | |
4983 | if (DECL_RTL (exp) == 0) | |
4984 | { | |
4985 | error_with_decl (exp, "prior parameter's size depends on `%s'"); | |
4af3895e | 4986 | return CONST0_RTX (mode); |
bbf6f052 RK |
4987 | } |
4988 | ||
0f41302f | 4989 | /* ... fall through ... */ |
d6a5ac33 | 4990 | |
bbf6f052 | 4991 | case VAR_DECL: |
2dca20cd RS |
4992 | /* If a static var's type was incomplete when the decl was written, |
4993 | but the type is complete now, lay out the decl now. */ | |
4994 | if (DECL_SIZE (exp) == 0 && TYPE_SIZE (TREE_TYPE (exp)) != 0 | |
4995 | && (TREE_STATIC (exp) || DECL_EXTERNAL (exp))) | |
4996 | { | |
4997 | push_obstacks_nochange (); | |
4998 | end_temporary_allocation (); | |
4999 | layout_decl (exp, 0); | |
5000 | PUT_MODE (DECL_RTL (exp), DECL_MODE (exp)); | |
5001 | pop_obstacks (); | |
5002 | } | |
d6a5ac33 | 5003 | |
921b3427 RK |
5004 | /* Only check automatic variables. Currently, function arguments are |
5005 | not checked (this can be done at compile-time with prototypes). | |
5006 | Aggregates are not checked. */ | |
5007 | if (flag_check_memory_usage && code == VAR_DECL | |
5008 | && GET_CODE (DECL_RTL (exp)) == MEM | |
5009 | && DECL_CONTEXT (exp) != NULL_TREE | |
5010 | && ! TREE_STATIC (exp) | |
5011 | && ! AGGREGATE_TYPE_P (TREE_TYPE (exp))) | |
5012 | { | |
5013 | enum memory_use_mode memory_usage; | |
5014 | memory_usage = get_memory_usage_from_modifier (modifier); | |
5015 | ||
5016 | if (memory_usage != MEMORY_USE_DONT) | |
5017 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
5018 | XEXP (DECL_RTL (exp), 0), ptr_mode, | |
5019 | GEN_INT (int_size_in_bytes (type)), | |
5020 | TYPE_MODE (sizetype), | |
956d6950 JL |
5021 | GEN_INT (memory_usage), |
5022 | TYPE_MODE (integer_type_node)); | |
921b3427 RK |
5023 | } |
5024 | ||
0f41302f | 5025 | /* ... fall through ... */ |
d6a5ac33 | 5026 | |
2dca20cd | 5027 | case FUNCTION_DECL: |
bbf6f052 RK |
5028 | case RESULT_DECL: |
5029 | if (DECL_RTL (exp) == 0) | |
5030 | abort (); | |
d6a5ac33 | 5031 | |
e44842fe RK |
5032 | /* Ensure variable marked as used even if it doesn't go through |
5033 | a parser. If it hasn't be used yet, write out an external | |
5034 | definition. */ | |
5035 | if (! TREE_USED (exp)) | |
5036 | { | |
5037 | assemble_external (exp); | |
5038 | TREE_USED (exp) = 1; | |
5039 | } | |
5040 | ||
dc6d66b3 RK |
5041 | /* Show we haven't gotten RTL for this yet. */ |
5042 | temp = 0; | |
5043 | ||
bbf6f052 RK |
5044 | /* Handle variables inherited from containing functions. */ |
5045 | context = decl_function_context (exp); | |
5046 | ||
5047 | /* We treat inline_function_decl as an alias for the current function | |
5048 | because that is the inline function whose vars, types, etc. | |
5049 | are being merged into the current function. | |
5050 | See expand_inline_function. */ | |
d6a5ac33 | 5051 | |
bbf6f052 RK |
5052 | if (context != 0 && context != current_function_decl |
5053 | && context != inline_function_decl | |
5054 | /* If var is static, we don't need a static chain to access it. */ | |
5055 | && ! (GET_CODE (DECL_RTL (exp)) == MEM | |
5056 | && CONSTANT_P (XEXP (DECL_RTL (exp), 0)))) | |
5057 | { | |
5058 | rtx addr; | |
5059 | ||
5060 | /* Mark as non-local and addressable. */ | |
81feeecb | 5061 | DECL_NONLOCAL (exp) = 1; |
38ee6ed9 JM |
5062 | if (DECL_NO_STATIC_CHAIN (current_function_decl)) |
5063 | abort (); | |
bbf6f052 RK |
5064 | mark_addressable (exp); |
5065 | if (GET_CODE (DECL_RTL (exp)) != MEM) | |
5066 | abort (); | |
5067 | addr = XEXP (DECL_RTL (exp), 0); | |
5068 | if (GET_CODE (addr) == MEM) | |
38a448ca RH |
5069 | addr = gen_rtx_MEM (Pmode, |
5070 | fix_lexical_addr (XEXP (addr, 0), exp)); | |
bbf6f052 RK |
5071 | else |
5072 | addr = fix_lexical_addr (addr, exp); | |
dc6d66b3 | 5073 | temp = change_address (DECL_RTL (exp), mode, addr); |
bbf6f052 | 5074 | } |
4af3895e | 5075 | |
bbf6f052 RK |
5076 | /* This is the case of an array whose size is to be determined |
5077 | from its initializer, while the initializer is still being parsed. | |
5078 | See expand_decl. */ | |
d6a5ac33 | 5079 | |
dc6d66b3 RK |
5080 | else if (GET_CODE (DECL_RTL (exp)) == MEM |
5081 | && GET_CODE (XEXP (DECL_RTL (exp), 0)) == REG) | |
5082 | temp = change_address (DECL_RTL (exp), GET_MODE (DECL_RTL (exp)), | |
bbf6f052 | 5083 | XEXP (DECL_RTL (exp), 0)); |
d6a5ac33 RK |
5084 | |
5085 | /* If DECL_RTL is memory, we are in the normal case and either | |
5086 | the address is not valid or it is not a register and -fforce-addr | |
5087 | is specified, get the address into a register. */ | |
5088 | ||
dc6d66b3 RK |
5089 | else if (GET_CODE (DECL_RTL (exp)) == MEM |
5090 | && modifier != EXPAND_CONST_ADDRESS | |
5091 | && modifier != EXPAND_SUM | |
5092 | && modifier != EXPAND_INITIALIZER | |
5093 | && (! memory_address_p (DECL_MODE (exp), | |
5094 | XEXP (DECL_RTL (exp), 0)) | |
5095 | || (flag_force_addr | |
5096 | && GET_CODE (XEXP (DECL_RTL (exp), 0)) != REG))) | |
5097 | temp = change_address (DECL_RTL (exp), VOIDmode, | |
d6a5ac33 | 5098 | copy_rtx (XEXP (DECL_RTL (exp), 0))); |
1499e0a8 | 5099 | |
dc6d66b3 RK |
5100 | /* If we got something, return it. But first, set the alignment |
5101 | the address is a register. */ | |
5102 | if (temp != 0) | |
5103 | { | |
5104 | if (GET_CODE (temp) == MEM && GET_CODE (XEXP (temp, 0)) == REG) | |
5105 | mark_reg_pointer (XEXP (temp, 0), | |
5106 | DECL_ALIGN (exp) / BITS_PER_UNIT); | |
5107 | ||
5108 | return temp; | |
5109 | } | |
5110 | ||
1499e0a8 RK |
5111 | /* If the mode of DECL_RTL does not match that of the decl, it |
5112 | must be a promoted value. We return a SUBREG of the wanted mode, | |
5113 | but mark it so that we know that it was already extended. */ | |
5114 | ||
5115 | if (GET_CODE (DECL_RTL (exp)) == REG | |
5116 | && GET_MODE (DECL_RTL (exp)) != mode) | |
5117 | { | |
1499e0a8 RK |
5118 | /* Get the signedness used for this variable. Ensure we get the |
5119 | same mode we got when the variable was declared. */ | |
78911e8b RK |
5120 | if (GET_MODE (DECL_RTL (exp)) |
5121 | != promote_mode (type, DECL_MODE (exp), &unsignedp, 0)) | |
1499e0a8 RK |
5122 | abort (); |
5123 | ||
38a448ca | 5124 | temp = gen_rtx_SUBREG (mode, DECL_RTL (exp), 0); |
1499e0a8 RK |
5125 | SUBREG_PROMOTED_VAR_P (temp) = 1; |
5126 | SUBREG_PROMOTED_UNSIGNED_P (temp) = unsignedp; | |
5127 | return temp; | |
5128 | } | |
5129 | ||
bbf6f052 RK |
5130 | return DECL_RTL (exp); |
5131 | ||
5132 | case INTEGER_CST: | |
5133 | return immed_double_const (TREE_INT_CST_LOW (exp), | |
5134 | TREE_INT_CST_HIGH (exp), | |
5135 | mode); | |
5136 | ||
5137 | case CONST_DECL: | |
921b3427 RK |
5138 | return expand_expr (DECL_INITIAL (exp), target, VOIDmode, |
5139 | EXPAND_MEMORY_USE_BAD); | |
bbf6f052 RK |
5140 | |
5141 | case REAL_CST: | |
5142 | /* If optimized, generate immediate CONST_DOUBLE | |
5143 | which will be turned into memory by reload if necessary. | |
5144 | ||
5145 | We used to force a register so that loop.c could see it. But | |
5146 | this does not allow gen_* patterns to perform optimizations with | |
5147 | the constants. It also produces two insns in cases like "x = 1.0;". | |
5148 | On most machines, floating-point constants are not permitted in | |
5149 | many insns, so we'd end up copying it to a register in any case. | |
5150 | ||
5151 | Now, we do the copying in expand_binop, if appropriate. */ | |
5152 | return immed_real_const (exp); | |
5153 | ||
5154 | case COMPLEX_CST: | |
5155 | case STRING_CST: | |
5156 | if (! TREE_CST_RTL (exp)) | |
5157 | output_constant_def (exp); | |
5158 | ||
5159 | /* TREE_CST_RTL probably contains a constant address. | |
5160 | On RISC machines where a constant address isn't valid, | |
5161 | make some insns to get that address into a register. */ | |
5162 | if (GET_CODE (TREE_CST_RTL (exp)) == MEM | |
5163 | && modifier != EXPAND_CONST_ADDRESS | |
5164 | && modifier != EXPAND_INITIALIZER | |
5165 | && modifier != EXPAND_SUM | |
d6a5ac33 RK |
5166 | && (! memory_address_p (mode, XEXP (TREE_CST_RTL (exp), 0)) |
5167 | || (flag_force_addr | |
5168 | && GET_CODE (XEXP (TREE_CST_RTL (exp), 0)) != REG))) | |
bbf6f052 RK |
5169 | return change_address (TREE_CST_RTL (exp), VOIDmode, |
5170 | copy_rtx (XEXP (TREE_CST_RTL (exp), 0))); | |
5171 | return TREE_CST_RTL (exp); | |
5172 | ||
bf1e5319 APB |
5173 | case EXPR_WITH_FILE_LOCATION: |
5174 | if (EXPR_WFL_EMIT_LINE_NOTE (exp)) | |
5175 | emit_line_note (EXPR_WFL_FILENAME (exp), EXPR_WFL_LINENO (exp)); | |
5176 | return expand_expr (EXPR_WFL_NODE (exp), target, tmode, modifier); | |
5177 | ||
bbf6f052 RK |
5178 | case SAVE_EXPR: |
5179 | context = decl_function_context (exp); | |
d6a5ac33 | 5180 | |
d0977240 RK |
5181 | /* If this SAVE_EXPR was at global context, assume we are an |
5182 | initialization function and move it into our context. */ | |
5183 | if (context == 0) | |
5184 | SAVE_EXPR_CONTEXT (exp) = current_function_decl; | |
5185 | ||
bbf6f052 RK |
5186 | /* We treat inline_function_decl as an alias for the current function |
5187 | because that is the inline function whose vars, types, etc. | |
5188 | are being merged into the current function. | |
5189 | See expand_inline_function. */ | |
5190 | if (context == current_function_decl || context == inline_function_decl) | |
5191 | context = 0; | |
5192 | ||
5193 | /* If this is non-local, handle it. */ | |
5194 | if (context) | |
5195 | { | |
d0977240 RK |
5196 | /* The following call just exists to abort if the context is |
5197 | not of a containing function. */ | |
5198 | find_function_data (context); | |
5199 | ||
bbf6f052 RK |
5200 | temp = SAVE_EXPR_RTL (exp); |
5201 | if (temp && GET_CODE (temp) == REG) | |
5202 | { | |
5203 | put_var_into_stack (exp); | |
5204 | temp = SAVE_EXPR_RTL (exp); | |
5205 | } | |
5206 | if (temp == 0 || GET_CODE (temp) != MEM) | |
5207 | abort (); | |
5208 | return change_address (temp, mode, | |
5209 | fix_lexical_addr (XEXP (temp, 0), exp)); | |
5210 | } | |
5211 | if (SAVE_EXPR_RTL (exp) == 0) | |
5212 | { | |
06089a8b RK |
5213 | if (mode == VOIDmode) |
5214 | temp = const0_rtx; | |
5215 | else | |
e5e809f4 | 5216 | temp = assign_temp (type, 3, 0, 0); |
1499e0a8 | 5217 | |
bbf6f052 | 5218 | SAVE_EXPR_RTL (exp) = temp; |
bbf6f052 | 5219 | if (!optimize && GET_CODE (temp) == REG) |
38a448ca RH |
5220 | save_expr_regs = gen_rtx_EXPR_LIST (VOIDmode, temp, |
5221 | save_expr_regs); | |
ff78f773 RK |
5222 | |
5223 | /* If the mode of TEMP does not match that of the expression, it | |
5224 | must be a promoted value. We pass store_expr a SUBREG of the | |
5225 | wanted mode but mark it so that we know that it was already | |
5226 | extended. Note that `unsignedp' was modified above in | |
5227 | this case. */ | |
5228 | ||
5229 | if (GET_CODE (temp) == REG && GET_MODE (temp) != mode) | |
5230 | { | |
38a448ca | 5231 | temp = gen_rtx_SUBREG (mode, SAVE_EXPR_RTL (exp), 0); |
ff78f773 RK |
5232 | SUBREG_PROMOTED_VAR_P (temp) = 1; |
5233 | SUBREG_PROMOTED_UNSIGNED_P (temp) = unsignedp; | |
5234 | } | |
5235 | ||
4c7a0be9 | 5236 | if (temp == const0_rtx) |
921b3427 RK |
5237 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, |
5238 | EXPAND_MEMORY_USE_BAD); | |
4c7a0be9 JW |
5239 | else |
5240 | store_expr (TREE_OPERAND (exp, 0), temp, 0); | |
e5e809f4 JL |
5241 | |
5242 | TREE_USED (exp) = 1; | |
bbf6f052 | 5243 | } |
1499e0a8 RK |
5244 | |
5245 | /* If the mode of SAVE_EXPR_RTL does not match that of the expression, it | |
5246 | must be a promoted value. We return a SUBREG of the wanted mode, | |
0f41302f | 5247 | but mark it so that we know that it was already extended. */ |
1499e0a8 RK |
5248 | |
5249 | if (GET_CODE (SAVE_EXPR_RTL (exp)) == REG | |
5250 | && GET_MODE (SAVE_EXPR_RTL (exp)) != mode) | |
5251 | { | |
e70d22c8 RK |
5252 | /* Compute the signedness and make the proper SUBREG. */ |
5253 | promote_mode (type, mode, &unsignedp, 0); | |
38a448ca | 5254 | temp = gen_rtx_SUBREG (mode, SAVE_EXPR_RTL (exp), 0); |
1499e0a8 RK |
5255 | SUBREG_PROMOTED_VAR_P (temp) = 1; |
5256 | SUBREG_PROMOTED_UNSIGNED_P (temp) = unsignedp; | |
5257 | return temp; | |
5258 | } | |
5259 | ||
bbf6f052 RK |
5260 | return SAVE_EXPR_RTL (exp); |
5261 | ||
679163cf MS |
5262 | case UNSAVE_EXPR: |
5263 | { | |
5264 | rtx temp; | |
5265 | temp = expand_expr (TREE_OPERAND (exp, 0), target, tmode, modifier); | |
5266 | TREE_OPERAND (exp, 0) = unsave_expr_now (TREE_OPERAND (exp, 0)); | |
5267 | return temp; | |
5268 | } | |
5269 | ||
b50d17a1 | 5270 | case PLACEHOLDER_EXPR: |
e9a25f70 JL |
5271 | { |
5272 | tree placeholder_expr; | |
5273 | ||
5274 | /* If there is an object on the head of the placeholder list, | |
e5e809f4 | 5275 | see if some object in it of type TYPE or a pointer to it. For |
e9a25f70 JL |
5276 | further information, see tree.def. */ |
5277 | for (placeholder_expr = placeholder_list; | |
5278 | placeholder_expr != 0; | |
5279 | placeholder_expr = TREE_CHAIN (placeholder_expr)) | |
5280 | { | |
5281 | tree need_type = TYPE_MAIN_VARIANT (type); | |
5282 | tree object = 0; | |
5283 | tree old_list = placeholder_list; | |
5284 | tree elt; | |
5285 | ||
e5e809f4 JL |
5286 | /* Find the outermost reference that is of the type we want. |
5287 | If none, see if any object has a type that is a pointer to | |
5288 | the type we want. */ | |
5289 | for (elt = TREE_PURPOSE (placeholder_expr); | |
5290 | elt != 0 && object == 0; | |
5291 | elt | |
5292 | = ((TREE_CODE (elt) == COMPOUND_EXPR | |
5293 | || TREE_CODE (elt) == COND_EXPR) | |
5294 | ? TREE_OPERAND (elt, 1) | |
5295 | : (TREE_CODE_CLASS (TREE_CODE (elt)) == 'r' | |
5296 | || TREE_CODE_CLASS (TREE_CODE (elt)) == '1' | |
5297 | || TREE_CODE_CLASS (TREE_CODE (elt)) == '2' | |
5298 | || TREE_CODE_CLASS (TREE_CODE (elt)) == 'e') | |
5299 | ? TREE_OPERAND (elt, 0) : 0)) | |
5300 | if (TYPE_MAIN_VARIANT (TREE_TYPE (elt)) == need_type) | |
5301 | object = elt; | |
e9a25f70 | 5302 | |
e9a25f70 | 5303 | for (elt = TREE_PURPOSE (placeholder_expr); |
e5e809f4 JL |
5304 | elt != 0 && object == 0; |
5305 | elt | |
5306 | = ((TREE_CODE (elt) == COMPOUND_EXPR | |
5307 | || TREE_CODE (elt) == COND_EXPR) | |
5308 | ? TREE_OPERAND (elt, 1) | |
5309 | : (TREE_CODE_CLASS (TREE_CODE (elt)) == 'r' | |
5310 | || TREE_CODE_CLASS (TREE_CODE (elt)) == '1' | |
5311 | || TREE_CODE_CLASS (TREE_CODE (elt)) == '2' | |
5312 | || TREE_CODE_CLASS (TREE_CODE (elt)) == 'e') | |
5313 | ? TREE_OPERAND (elt, 0) : 0)) | |
5314 | if (POINTER_TYPE_P (TREE_TYPE (elt)) | |
5315 | && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt))) | |
e9a25f70 | 5316 | == need_type)) |
e5e809f4 | 5317 | object = build1 (INDIRECT_REF, need_type, elt); |
dc500fa1 | 5318 | |
e9a25f70 | 5319 | if (object != 0) |
2cde2255 | 5320 | { |
e9a25f70 JL |
5321 | /* Expand this object skipping the list entries before |
5322 | it was found in case it is also a PLACEHOLDER_EXPR. | |
5323 | In that case, we want to translate it using subsequent | |
5324 | entries. */ | |
5325 | placeholder_list = TREE_CHAIN (placeholder_expr); | |
5326 | temp = expand_expr (object, original_target, tmode, | |
5327 | ro_modifier); | |
5328 | placeholder_list = old_list; | |
5329 | return temp; | |
2cde2255 | 5330 | } |
e9a25f70 JL |
5331 | } |
5332 | } | |
b50d17a1 RK |
5333 | |
5334 | /* We can't find the object or there was a missing WITH_RECORD_EXPR. */ | |
5335 | abort (); | |
5336 | ||
5337 | case WITH_RECORD_EXPR: | |
5338 | /* Put the object on the placeholder list, expand our first operand, | |
5339 | and pop the list. */ | |
5340 | placeholder_list = tree_cons (TREE_OPERAND (exp, 1), NULL_TREE, | |
5341 | placeholder_list); | |
5342 | target = expand_expr (TREE_OPERAND (exp, 0), original_target, | |
921b3427 | 5343 | tmode, ro_modifier); |
b50d17a1 RK |
5344 | placeholder_list = TREE_CHAIN (placeholder_list); |
5345 | return target; | |
5346 | ||
bbf6f052 | 5347 | case EXIT_EXPR: |
e44842fe RK |
5348 | expand_exit_loop_if_false (NULL_PTR, |
5349 | invert_truthvalue (TREE_OPERAND (exp, 0))); | |
bbf6f052 RK |
5350 | return const0_rtx; |
5351 | ||
5352 | case LOOP_EXPR: | |
0088fcb1 | 5353 | push_temp_slots (); |
bbf6f052 RK |
5354 | expand_start_loop (1); |
5355 | expand_expr_stmt (TREE_OPERAND (exp, 0)); | |
5356 | expand_end_loop (); | |
0088fcb1 | 5357 | pop_temp_slots (); |
bbf6f052 RK |
5358 | |
5359 | return const0_rtx; | |
5360 | ||
5361 | case BIND_EXPR: | |
5362 | { | |
5363 | tree vars = TREE_OPERAND (exp, 0); | |
5364 | int vars_need_expansion = 0; | |
5365 | ||
5366 | /* Need to open a binding contour here because | |
e976b8b2 | 5367 | if there are any cleanups they must be contained here. */ |
bbf6f052 RK |
5368 | expand_start_bindings (0); |
5369 | ||
2df53c0b RS |
5370 | /* Mark the corresponding BLOCK for output in its proper place. */ |
5371 | if (TREE_OPERAND (exp, 2) != 0 | |
5372 | && ! TREE_USED (TREE_OPERAND (exp, 2))) | |
5373 | insert_block (TREE_OPERAND (exp, 2)); | |
bbf6f052 RK |
5374 | |
5375 | /* If VARS have not yet been expanded, expand them now. */ | |
5376 | while (vars) | |
5377 | { | |
5378 | if (DECL_RTL (vars) == 0) | |
5379 | { | |
5380 | vars_need_expansion = 1; | |
5381 | expand_decl (vars); | |
5382 | } | |
5383 | expand_decl_init (vars); | |
5384 | vars = TREE_CHAIN (vars); | |
5385 | } | |
5386 | ||
921b3427 | 5387 | temp = expand_expr (TREE_OPERAND (exp, 1), target, tmode, ro_modifier); |
bbf6f052 RK |
5388 | |
5389 | expand_end_bindings (TREE_OPERAND (exp, 0), 0, 0); | |
5390 | ||
5391 | return temp; | |
5392 | } | |
5393 | ||
5394 | case RTL_EXPR: | |
83b853c9 JM |
5395 | if (RTL_EXPR_SEQUENCE (exp)) |
5396 | { | |
5397 | if (RTL_EXPR_SEQUENCE (exp) == const0_rtx) | |
5398 | abort (); | |
5399 | emit_insns (RTL_EXPR_SEQUENCE (exp)); | |
5400 | RTL_EXPR_SEQUENCE (exp) = const0_rtx; | |
5401 | } | |
99310285 | 5402 | preserve_rtl_expr_result (RTL_EXPR_RTL (exp)); |
ca814259 | 5403 | free_temps_for_rtl_expr (exp); |
bbf6f052 RK |
5404 | return RTL_EXPR_RTL (exp); |
5405 | ||
5406 | case CONSTRUCTOR: | |
dd27116b RK |
5407 | /* If we don't need the result, just ensure we evaluate any |
5408 | subexpressions. */ | |
5409 | if (ignore) | |
5410 | { | |
5411 | tree elt; | |
5412 | for (elt = CONSTRUCTOR_ELTS (exp); elt; elt = TREE_CHAIN (elt)) | |
921b3427 RK |
5413 | expand_expr (TREE_VALUE (elt), const0_rtx, VOIDmode, |
5414 | EXPAND_MEMORY_USE_BAD); | |
dd27116b RK |
5415 | return const0_rtx; |
5416 | } | |
3207b172 | 5417 | |
4af3895e JVA |
5418 | /* All elts simple constants => refer to a constant in memory. But |
5419 | if this is a non-BLKmode mode, let it store a field at a time | |
5420 | since that should make a CONST_INT or CONST_DOUBLE when we | |
3207b172 | 5421 | fold. Likewise, if we have a target we can use, it is best to |
d720b9d1 RK |
5422 | store directly into the target unless the type is large enough |
5423 | that memcpy will be used. If we are making an initializer and | |
3207b172 | 5424 | all operands are constant, put it in memory as well. */ |
dd27116b | 5425 | else if ((TREE_STATIC (exp) |
3207b172 | 5426 | && ((mode == BLKmode |
e5e809f4 | 5427 | && ! (target != 0 && safe_from_p (target, exp, 1))) |
d720b9d1 RK |
5428 | || TREE_ADDRESSABLE (exp) |
5429 | || (TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST | |
5430 | && (move_by_pieces_ninsns | |
67225c15 RK |
5431 | (TREE_INT_CST_LOW (TYPE_SIZE (type))/BITS_PER_UNIT, |
5432 | TYPE_ALIGN (type) / BITS_PER_UNIT) | |
9de08200 RK |
5433 | > MOVE_RATIO) |
5434 | && ! mostly_zeros_p (exp)))) | |
dd27116b | 5435 | || (modifier == EXPAND_INITIALIZER && TREE_CONSTANT (exp))) |
bbf6f052 RK |
5436 | { |
5437 | rtx constructor = output_constant_def (exp); | |
b552441b RS |
5438 | if (modifier != EXPAND_CONST_ADDRESS |
5439 | && modifier != EXPAND_INITIALIZER | |
5440 | && modifier != EXPAND_SUM | |
d6a5ac33 RK |
5441 | && (! memory_address_p (GET_MODE (constructor), |
5442 | XEXP (constructor, 0)) | |
5443 | || (flag_force_addr | |
5444 | && GET_CODE (XEXP (constructor, 0)) != REG))) | |
bbf6f052 RK |
5445 | constructor = change_address (constructor, VOIDmode, |
5446 | XEXP (constructor, 0)); | |
5447 | return constructor; | |
5448 | } | |
5449 | ||
bbf6f052 RK |
5450 | else |
5451 | { | |
e9ac02a6 JW |
5452 | /* Handle calls that pass values in multiple non-contiguous |
5453 | locations. The Irix 6 ABI has examples of this. */ | |
e5e809f4 | 5454 | if (target == 0 || ! safe_from_p (target, exp, 1) |
e9ac02a6 | 5455 | || GET_CODE (target) == PARALLEL) |
06089a8b RK |
5456 | { |
5457 | if (mode != BLKmode && ! TREE_ADDRESSABLE (exp)) | |
5458 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); | |
5459 | else | |
5460 | target = assign_temp (type, 0, 1, 1); | |
5461 | } | |
07604beb RK |
5462 | |
5463 | if (TREE_READONLY (exp)) | |
5464 | { | |
9151b3bf | 5465 | if (GET_CODE (target) == MEM) |
effbcc6a RK |
5466 | target = copy_rtx (target); |
5467 | ||
07604beb RK |
5468 | RTX_UNCHANGING_P (target) = 1; |
5469 | } | |
5470 | ||
e1a43f73 | 5471 | store_constructor (exp, target, 0); |
bbf6f052 RK |
5472 | return target; |
5473 | } | |
5474 | ||
5475 | case INDIRECT_REF: | |
5476 | { | |
5477 | tree exp1 = TREE_OPERAND (exp, 0); | |
5478 | tree exp2; | |
7581a30f JW |
5479 | tree index; |
5480 | tree string = string_constant (exp1, &index); | |
5481 | int i; | |
5482 | ||
06eaa86f | 5483 | /* Try to optimize reads from const strings. */ |
7581a30f JW |
5484 | if (string |
5485 | && TREE_CODE (string) == STRING_CST | |
5486 | && TREE_CODE (index) == INTEGER_CST | |
5487 | && !TREE_INT_CST_HIGH (index) | |
5488 | && (i = TREE_INT_CST_LOW (index)) < TREE_STRING_LENGTH (string) | |
5489 | && GET_MODE_CLASS (mode) == MODE_INT | |
06eaa86f JW |
5490 | && GET_MODE_SIZE (mode) == 1 |
5491 | && modifier != EXPAND_MEMORY_USE_WO) | |
7581a30f | 5492 | return GEN_INT (TREE_STRING_POINTER (string)[i]); |
bbf6f052 | 5493 | |
405f0da6 JW |
5494 | op0 = expand_expr (exp1, NULL_RTX, VOIDmode, EXPAND_SUM); |
5495 | op0 = memory_address (mode, op0); | |
8c8a8e34 | 5496 | |
921b3427 RK |
5497 | if (flag_check_memory_usage && !AGGREGATE_TYPE_P (TREE_TYPE (exp))) |
5498 | { | |
5499 | enum memory_use_mode memory_usage; | |
5500 | memory_usage = get_memory_usage_from_modifier (modifier); | |
5501 | ||
5502 | if (memory_usage != MEMORY_USE_DONT) | |
c85f7c16 JL |
5503 | { |
5504 | in_check_memory_usage = 1; | |
5505 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
5506 | op0, ptr_mode, | |
5507 | GEN_INT (int_size_in_bytes (type)), | |
5508 | TYPE_MODE (sizetype), | |
5509 | GEN_INT (memory_usage), | |
5510 | TYPE_MODE (integer_type_node)); | |
5511 | in_check_memory_usage = 0; | |
5512 | } | |
921b3427 RK |
5513 | } |
5514 | ||
38a448ca | 5515 | temp = gen_rtx_MEM (mode, op0); |
8c8a8e34 JW |
5516 | /* If address was computed by addition, |
5517 | mark this as an element of an aggregate. */ | |
5518 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == PLUS_EXPR | |
5519 | || (TREE_CODE (TREE_OPERAND (exp, 0)) == SAVE_EXPR | |
5520 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)) == PLUS_EXPR) | |
05e3bdb9 | 5521 | || AGGREGATE_TYPE_P (TREE_TYPE (exp)) |
8c8a8e34 JW |
5522 | || (TREE_CODE (exp1) == ADDR_EXPR |
5523 | && (exp2 = TREE_OPERAND (exp1, 0)) | |
05e3bdb9 | 5524 | && AGGREGATE_TYPE_P (TREE_TYPE (exp2)))) |
8c8a8e34 | 5525 | MEM_IN_STRUCT_P (temp) = 1; |
2c4c436a | 5526 | MEM_VOLATILE_P (temp) = TREE_THIS_VOLATILE (exp) | flag_volatile; |
1125706f RK |
5527 | |
5528 | /* It is incorrect to set RTX_UNCHANGING_P from TREE_READONLY | |
5529 | here, because, in C and C++, the fact that a location is accessed | |
5530 | through a pointer to const does not mean that the value there can | |
5531 | never change. Languages where it can never change should | |
5532 | also set TREE_STATIC. */ | |
5cb7a25a | 5533 | RTX_UNCHANGING_P (temp) = TREE_READONLY (exp) & TREE_STATIC (exp); |
8c8a8e34 JW |
5534 | return temp; |
5535 | } | |
bbf6f052 RK |
5536 | |
5537 | case ARRAY_REF: | |
742920c7 RK |
5538 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) != ARRAY_TYPE) |
5539 | abort (); | |
bbf6f052 | 5540 | |
bbf6f052 | 5541 | { |
742920c7 RK |
5542 | tree array = TREE_OPERAND (exp, 0); |
5543 | tree domain = TYPE_DOMAIN (TREE_TYPE (array)); | |
5544 | tree low_bound = domain ? TYPE_MIN_VALUE (domain) : integer_zero_node; | |
5545 | tree index = TREE_OPERAND (exp, 1); | |
5546 | tree index_type = TREE_TYPE (index); | |
08293add | 5547 | HOST_WIDE_INT i; |
b50d17a1 | 5548 | |
d4c89139 PB |
5549 | /* Optimize the special-case of a zero lower bound. |
5550 | ||
5551 | We convert the low_bound to sizetype to avoid some problems | |
5552 | with constant folding. (E.g. suppose the lower bound is 1, | |
5553 | and its mode is QI. Without the conversion, (ARRAY | |
5554 | +(INDEX-(unsigned char)1)) becomes ((ARRAY+(-(unsigned char)1)) | |
5555 | +INDEX), which becomes (ARRAY+255+INDEX). Oops!) | |
5556 | ||
5557 | But sizetype isn't quite right either (especially if | |
5558 | the lowbound is negative). FIXME */ | |
5559 | ||
742920c7 | 5560 | if (! integer_zerop (low_bound)) |
d4c89139 PB |
5561 | index = fold (build (MINUS_EXPR, index_type, index, |
5562 | convert (sizetype, low_bound))); | |
742920c7 | 5563 | |
742920c7 | 5564 | /* Fold an expression like: "foo"[2]. |
ad2e7dd0 RK |
5565 | This is not done in fold so it won't happen inside &. |
5566 | Don't fold if this is for wide characters since it's too | |
5567 | difficult to do correctly and this is a very rare case. */ | |
742920c7 RK |
5568 | |
5569 | if (TREE_CODE (array) == STRING_CST | |
5570 | && TREE_CODE (index) == INTEGER_CST | |
5571 | && !TREE_INT_CST_HIGH (index) | |
307b821c | 5572 | && (i = TREE_INT_CST_LOW (index)) < TREE_STRING_LENGTH (array) |
ad2e7dd0 RK |
5573 | && GET_MODE_CLASS (mode) == MODE_INT |
5574 | && GET_MODE_SIZE (mode) == 1) | |
307b821c | 5575 | return GEN_INT (TREE_STRING_POINTER (array)[i]); |
bbf6f052 | 5576 | |
742920c7 RK |
5577 | /* If this is a constant index into a constant array, |
5578 | just get the value from the array. Handle both the cases when | |
5579 | we have an explicit constructor and when our operand is a variable | |
5580 | that was declared const. */ | |
4af3895e | 5581 | |
742920c7 RK |
5582 | if (TREE_CODE (array) == CONSTRUCTOR && ! TREE_SIDE_EFFECTS (array)) |
5583 | { | |
5584 | if (TREE_CODE (index) == INTEGER_CST | |
5585 | && TREE_INT_CST_HIGH (index) == 0) | |
5586 | { | |
5587 | tree elem = CONSTRUCTOR_ELTS (TREE_OPERAND (exp, 0)); | |
5588 | ||
5589 | i = TREE_INT_CST_LOW (index); | |
5590 | while (elem && i--) | |
5591 | elem = TREE_CHAIN (elem); | |
5592 | if (elem) | |
5593 | return expand_expr (fold (TREE_VALUE (elem)), target, | |
921b3427 | 5594 | tmode, ro_modifier); |
742920c7 RK |
5595 | } |
5596 | } | |
4af3895e | 5597 | |
742920c7 RK |
5598 | else if (optimize >= 1 |
5599 | && TREE_READONLY (array) && ! TREE_SIDE_EFFECTS (array) | |
5600 | && TREE_CODE (array) == VAR_DECL && DECL_INITIAL (array) | |
5601 | && TREE_CODE (DECL_INITIAL (array)) != ERROR_MARK) | |
5602 | { | |
08293add | 5603 | if (TREE_CODE (index) == INTEGER_CST) |
742920c7 RK |
5604 | { |
5605 | tree init = DECL_INITIAL (array); | |
5606 | ||
5607 | i = TREE_INT_CST_LOW (index); | |
5608 | if (TREE_CODE (init) == CONSTRUCTOR) | |
5609 | { | |
5610 | tree elem = CONSTRUCTOR_ELTS (init); | |
5611 | ||
03dc44a6 RS |
5612 | while (elem |
5613 | && !tree_int_cst_equal (TREE_PURPOSE (elem), index)) | |
742920c7 RK |
5614 | elem = TREE_CHAIN (elem); |
5615 | if (elem) | |
5616 | return expand_expr (fold (TREE_VALUE (elem)), target, | |
921b3427 | 5617 | tmode, ro_modifier); |
742920c7 RK |
5618 | } |
5619 | else if (TREE_CODE (init) == STRING_CST | |
08293add RK |
5620 | && TREE_INT_CST_HIGH (index) == 0 |
5621 | && (TREE_INT_CST_LOW (index) | |
5622 | < TREE_STRING_LENGTH (init))) | |
5623 | return (GEN_INT | |
5624 | (TREE_STRING_POINTER | |
5625 | (init)[TREE_INT_CST_LOW (index)])); | |
742920c7 RK |
5626 | } |
5627 | } | |
5628 | } | |
8c8a8e34 | 5629 | |
08293add | 5630 | /* ... fall through ... */ |
bbf6f052 RK |
5631 | |
5632 | case COMPONENT_REF: | |
5633 | case BIT_FIELD_REF: | |
4af3895e | 5634 | /* If the operand is a CONSTRUCTOR, we can just extract the |
7a0b7b9a RK |
5635 | appropriate field if it is present. Don't do this if we have |
5636 | already written the data since we want to refer to that copy | |
5637 | and varasm.c assumes that's what we'll do. */ | |
4af3895e | 5638 | if (code != ARRAY_REF |
7a0b7b9a RK |
5639 | && TREE_CODE (TREE_OPERAND (exp, 0)) == CONSTRUCTOR |
5640 | && TREE_CST_RTL (TREE_OPERAND (exp, 0)) == 0) | |
4af3895e JVA |
5641 | { |
5642 | tree elt; | |
5643 | ||
5644 | for (elt = CONSTRUCTOR_ELTS (TREE_OPERAND (exp, 0)); elt; | |
5645 | elt = TREE_CHAIN (elt)) | |
86b5812c RK |
5646 | if (TREE_PURPOSE (elt) == TREE_OPERAND (exp, 1) |
5647 | /* We can normally use the value of the field in the | |
5648 | CONSTRUCTOR. However, if this is a bitfield in | |
5649 | an integral mode that we can fit in a HOST_WIDE_INT, | |
5650 | we must mask only the number of bits in the bitfield, | |
5651 | since this is done implicitly by the constructor. If | |
5652 | the bitfield does not meet either of those conditions, | |
5653 | we can't do this optimization. */ | |
5654 | && (! DECL_BIT_FIELD (TREE_PURPOSE (elt)) | |
5655 | || ((GET_MODE_CLASS (DECL_MODE (TREE_PURPOSE (elt))) | |
5656 | == MODE_INT) | |
5657 | && (GET_MODE_BITSIZE (DECL_MODE (TREE_PURPOSE (elt))) | |
5658 | <= HOST_BITS_PER_WIDE_INT)))) | |
5659 | { | |
5660 | op0 = expand_expr (TREE_VALUE (elt), target, tmode, modifier); | |
5661 | if (DECL_BIT_FIELD (TREE_PURPOSE (elt))) | |
5662 | { | |
5663 | int bitsize = DECL_FIELD_SIZE (TREE_PURPOSE (elt)); | |
86b5812c RK |
5664 | |
5665 | if (TREE_UNSIGNED (TREE_TYPE (TREE_PURPOSE (elt)))) | |
5666 | { | |
5667 | op1 = GEN_INT (((HOST_WIDE_INT) 1 << bitsize) - 1); | |
5668 | op0 = expand_and (op0, op1, target); | |
5669 | } | |
5670 | else | |
5671 | { | |
e5e809f4 JL |
5672 | enum machine_mode imode |
5673 | = TYPE_MODE (TREE_TYPE (TREE_PURPOSE (elt))); | |
86b5812c | 5674 | tree count |
e5e809f4 JL |
5675 | = build_int_2 (GET_MODE_BITSIZE (imode) - bitsize, |
5676 | 0); | |
86b5812c RK |
5677 | |
5678 | op0 = expand_shift (LSHIFT_EXPR, imode, op0, count, | |
5679 | target, 0); | |
5680 | op0 = expand_shift (RSHIFT_EXPR, imode, op0, count, | |
5681 | target, 0); | |
5682 | } | |
5683 | } | |
5684 | ||
5685 | return op0; | |
5686 | } | |
4af3895e JVA |
5687 | } |
5688 | ||
bbf6f052 RK |
5689 | { |
5690 | enum machine_mode mode1; | |
5691 | int bitsize; | |
5692 | int bitpos; | |
7bb0943f | 5693 | tree offset; |
bbf6f052 | 5694 | int volatilep = 0; |
034f9101 | 5695 | int alignment; |
839c4796 RK |
5696 | tree tem = get_inner_reference (exp, &bitsize, &bitpos, &offset, |
5697 | &mode1, &unsignedp, &volatilep, | |
5698 | &alignment); | |
bbf6f052 | 5699 | |
e7f3c83f RK |
5700 | /* If we got back the original object, something is wrong. Perhaps |
5701 | we are evaluating an expression too early. In any event, don't | |
5702 | infinitely recurse. */ | |
5703 | if (tem == exp) | |
5704 | abort (); | |
5705 | ||
3d27140a | 5706 | /* If TEM's type is a union of variable size, pass TARGET to the inner |
b74f5ff2 RK |
5707 | computation, since it will need a temporary and TARGET is known |
5708 | to have to do. This occurs in unchecked conversion in Ada. */ | |
5709 | ||
5710 | op0 = expand_expr (tem, | |
5711 | (TREE_CODE (TREE_TYPE (tem)) == UNION_TYPE | |
5712 | && (TREE_CODE (TYPE_SIZE (TREE_TYPE (tem))) | |
5713 | != INTEGER_CST) | |
5714 | ? target : NULL_RTX), | |
4ed67205 | 5715 | VOIDmode, |
e5e809f4 JL |
5716 | modifier == EXPAND_INITIALIZER |
5717 | ? modifier : EXPAND_NORMAL); | |
bbf6f052 | 5718 | |
8c8a8e34 | 5719 | /* If this is a constant, put it into a register if it is a |
8008b228 | 5720 | legitimate constant and memory if it isn't. */ |
8c8a8e34 JW |
5721 | if (CONSTANT_P (op0)) |
5722 | { | |
5723 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (tem)); | |
f2878c6b | 5724 | if (mode != BLKmode && LEGITIMATE_CONSTANT_P (op0)) |
8c8a8e34 JW |
5725 | op0 = force_reg (mode, op0); |
5726 | else | |
5727 | op0 = validize_mem (force_const_mem (mode, op0)); | |
5728 | } | |
5729 | ||
7bb0943f RS |
5730 | if (offset != 0) |
5731 | { | |
906c4e36 | 5732 | rtx offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, 0); |
7bb0943f RS |
5733 | |
5734 | if (GET_CODE (op0) != MEM) | |
5735 | abort (); | |
2d48c13d JL |
5736 | |
5737 | if (GET_MODE (offset_rtx) != ptr_mode) | |
5738 | #ifdef POINTERS_EXTEND_UNSIGNED | |
5739 | offset_rtx = convert_to_mode (ptr_mode, offset_rtx, 1); | |
5740 | #else | |
5741 | offset_rtx = convert_to_mode (ptr_mode, offset_rtx, 0); | |
5742 | #endif | |
5743 | ||
7bb0943f | 5744 | op0 = change_address (op0, VOIDmode, |
38a448ca RH |
5745 | gen_rtx_PLUS (ptr_mode, XEXP (op0, 0), |
5746 | force_reg (ptr_mode, offset_rtx))); | |
7bb0943f RS |
5747 | } |
5748 | ||
bbf6f052 RK |
5749 | /* Don't forget about volatility even if this is a bitfield. */ |
5750 | if (GET_CODE (op0) == MEM && volatilep && ! MEM_VOLATILE_P (op0)) | |
5751 | { | |
5752 | op0 = copy_rtx (op0); | |
5753 | MEM_VOLATILE_P (op0) = 1; | |
5754 | } | |
5755 | ||
921b3427 RK |
5756 | /* Check the access. */ |
5757 | if (flag_check_memory_usage && GET_CODE (op0) == MEM) | |
5758 | { | |
5759 | enum memory_use_mode memory_usage; | |
5760 | memory_usage = get_memory_usage_from_modifier (modifier); | |
5761 | ||
5762 | if (memory_usage != MEMORY_USE_DONT) | |
5763 | { | |
5764 | rtx to; | |
5765 | int size; | |
5766 | ||
5767 | to = plus_constant (XEXP (op0, 0), (bitpos / BITS_PER_UNIT)); | |
5768 | size = (bitpos % BITS_PER_UNIT) + bitsize + BITS_PER_UNIT - 1; | |
5769 | ||
5770 | /* Check the access right of the pointer. */ | |
e9a25f70 JL |
5771 | if (size > BITS_PER_UNIT) |
5772 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
5773 | to, ptr_mode, | |
5774 | GEN_INT (size / BITS_PER_UNIT), | |
5775 | TYPE_MODE (sizetype), | |
956d6950 JL |
5776 | GEN_INT (memory_usage), |
5777 | TYPE_MODE (integer_type_node)); | |
921b3427 RK |
5778 | } |
5779 | } | |
5780 | ||
ccc98036 RS |
5781 | /* In cases where an aligned union has an unaligned object |
5782 | as a field, we might be extracting a BLKmode value from | |
5783 | an integer-mode (e.g., SImode) object. Handle this case | |
5784 | by doing the extract into an object as wide as the field | |
5785 | (which we know to be the width of a basic mode), then | |
f2420d0b JW |
5786 | storing into memory, and changing the mode to BLKmode. |
5787 | If we ultimately want the address (EXPAND_CONST_ADDRESS or | |
5788 | EXPAND_INITIALIZER), then we must not copy to a temporary. */ | |
bbf6f052 | 5789 | if (mode1 == VOIDmode |
ccc98036 | 5790 | || GET_CODE (op0) == REG || GET_CODE (op0) == SUBREG |
f9409c3a | 5791 | || (modifier != EXPAND_CONST_ADDRESS |
f9409c3a | 5792 | && modifier != EXPAND_INITIALIZER |
c2722ef6 RK |
5793 | && ((mode1 != BLKmode && ! direct_load[(int) mode1] |
5794 | && GET_MODE_CLASS (mode) != MODE_COMPLEX_INT | |
5795 | && GET_MODE_CLASS (mode) != MODE_COMPLEX_FLOAT) | |
f9409c3a JW |
5796 | /* If the field isn't aligned enough to fetch as a memref, |
5797 | fetch it as a bit field. */ | |
5798 | || (SLOW_UNALIGNED_ACCESS | |
5799 | && ((TYPE_ALIGN (TREE_TYPE (tem)) < GET_MODE_ALIGNMENT (mode)) | |
5800 | || (bitpos % GET_MODE_ALIGNMENT (mode) != 0)))))) | |
bbf6f052 | 5801 | { |
bbf6f052 RK |
5802 | enum machine_mode ext_mode = mode; |
5803 | ||
5804 | if (ext_mode == BLKmode) | |
5805 | ext_mode = mode_for_size (bitsize, MODE_INT, 1); | |
5806 | ||
5807 | if (ext_mode == BLKmode) | |
a281e72d RK |
5808 | { |
5809 | /* In this case, BITPOS must start at a byte boundary and | |
5810 | TARGET, if specified, must be a MEM. */ | |
5811 | if (GET_CODE (op0) != MEM | |
5812 | || (target != 0 && GET_CODE (target) != MEM) | |
5813 | || bitpos % BITS_PER_UNIT != 0) | |
5814 | abort (); | |
5815 | ||
5816 | op0 = change_address (op0, VOIDmode, | |
5817 | plus_constant (XEXP (op0, 0), | |
5818 | bitpos / BITS_PER_UNIT)); | |
5819 | if (target == 0) | |
5820 | target = assign_temp (type, 0, 1, 1); | |
5821 | ||
5822 | emit_block_move (target, op0, | |
5823 | GEN_INT ((bitsize + BITS_PER_UNIT - 1) | |
5824 | / BITS_PER_UNIT), | |
5825 | 1); | |
5826 | ||
5827 | return target; | |
5828 | } | |
bbf6f052 | 5829 | |
dc6d66b3 RK |
5830 | op0 = validize_mem (op0); |
5831 | ||
5832 | if (GET_CODE (op0) == MEM && GET_CODE (XEXP (op0, 0)) == REG) | |
5833 | mark_reg_pointer (XEXP (op0, 0), alignment); | |
5834 | ||
5835 | op0 = extract_bit_field (op0, bitsize, bitpos, | |
bbf6f052 | 5836 | unsignedp, target, ext_mode, ext_mode, |
034f9101 | 5837 | alignment, |
bbf6f052 | 5838 | int_size_in_bytes (TREE_TYPE (tem))); |
ef19912d RK |
5839 | |
5840 | /* If the result is a record type and BITSIZE is narrower than | |
5841 | the mode of OP0, an integral mode, and this is a big endian | |
5842 | machine, we must put the field into the high-order bits. */ | |
5843 | if (TREE_CODE (type) == RECORD_TYPE && BYTES_BIG_ENDIAN | |
5844 | && GET_MODE_CLASS (GET_MODE (op0)) == MODE_INT | |
5845 | && bitsize < GET_MODE_BITSIZE (GET_MODE (op0))) | |
5846 | op0 = expand_shift (LSHIFT_EXPR, GET_MODE (op0), op0, | |
5847 | size_int (GET_MODE_BITSIZE (GET_MODE (op0)) | |
5848 | - bitsize), | |
5849 | op0, 1); | |
5850 | ||
bbf6f052 RK |
5851 | if (mode == BLKmode) |
5852 | { | |
5853 | rtx new = assign_stack_temp (ext_mode, | |
5854 | bitsize / BITS_PER_UNIT, 0); | |
5855 | ||
5856 | emit_move_insn (new, op0); | |
5857 | op0 = copy_rtx (new); | |
5858 | PUT_MODE (op0, BLKmode); | |
092dded9 | 5859 | MEM_IN_STRUCT_P (op0) = 1; |
bbf6f052 RK |
5860 | } |
5861 | ||
5862 | return op0; | |
5863 | } | |
5864 | ||
05019f83 RK |
5865 | /* If the result is BLKmode, use that to access the object |
5866 | now as well. */ | |
5867 | if (mode == BLKmode) | |
5868 | mode1 = BLKmode; | |
5869 | ||
bbf6f052 RK |
5870 | /* Get a reference to just this component. */ |
5871 | if (modifier == EXPAND_CONST_ADDRESS | |
5872 | || modifier == EXPAND_SUM || modifier == EXPAND_INITIALIZER) | |
38a448ca RH |
5873 | op0 = gen_rtx_MEM (mode1, plus_constant (XEXP (op0, 0), |
5874 | (bitpos / BITS_PER_UNIT))); | |
bbf6f052 RK |
5875 | else |
5876 | op0 = change_address (op0, mode1, | |
5877 | plus_constant (XEXP (op0, 0), | |
5878 | (bitpos / BITS_PER_UNIT))); | |
dc6d66b3 RK |
5879 | if (GET_CODE (XEXP (op0, 0)) == REG) |
5880 | mark_reg_pointer (XEXP (op0, 0), alignment); | |
5881 | ||
bbf6f052 RK |
5882 | MEM_IN_STRUCT_P (op0) = 1; |
5883 | MEM_VOLATILE_P (op0) |= volatilep; | |
0d15e60c | 5884 | if (mode == mode1 || mode1 == BLKmode || mode1 == tmode |
08bbd316 | 5885 | || modifier == EXPAND_CONST_ADDRESS |
0d15e60c | 5886 | || modifier == EXPAND_INITIALIZER) |
bbf6f052 | 5887 | return op0; |
0d15e60c | 5888 | else if (target == 0) |
bbf6f052 | 5889 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); |
0d15e60c | 5890 | |
bbf6f052 RK |
5891 | convert_move (target, op0, unsignedp); |
5892 | return target; | |
5893 | } | |
5894 | ||
bbf6f052 RK |
5895 | /* Intended for a reference to a buffer of a file-object in Pascal. |
5896 | But it's not certain that a special tree code will really be | |
5897 | necessary for these. INDIRECT_REF might work for them. */ | |
5898 | case BUFFER_REF: | |
5899 | abort (); | |
5900 | ||
7308a047 | 5901 | case IN_EXPR: |
7308a047 | 5902 | { |
d6a5ac33 RK |
5903 | /* Pascal set IN expression. |
5904 | ||
5905 | Algorithm: | |
5906 | rlo = set_low - (set_low%bits_per_word); | |
5907 | the_word = set [ (index - rlo)/bits_per_word ]; | |
5908 | bit_index = index % bits_per_word; | |
5909 | bitmask = 1 << bit_index; | |
5910 | return !!(the_word & bitmask); */ | |
5911 | ||
7308a047 RS |
5912 | tree set = TREE_OPERAND (exp, 0); |
5913 | tree index = TREE_OPERAND (exp, 1); | |
d6a5ac33 | 5914 | int iunsignedp = TREE_UNSIGNED (TREE_TYPE (index)); |
7308a047 | 5915 | tree set_type = TREE_TYPE (set); |
7308a047 RS |
5916 | tree set_low_bound = TYPE_MIN_VALUE (TYPE_DOMAIN (set_type)); |
5917 | tree set_high_bound = TYPE_MAX_VALUE (TYPE_DOMAIN (set_type)); | |
d6a5ac33 RK |
5918 | rtx index_val = expand_expr (index, 0, VOIDmode, 0); |
5919 | rtx lo_r = expand_expr (set_low_bound, 0, VOIDmode, 0); | |
5920 | rtx hi_r = expand_expr (set_high_bound, 0, VOIDmode, 0); | |
5921 | rtx setval = expand_expr (set, 0, VOIDmode, 0); | |
5922 | rtx setaddr = XEXP (setval, 0); | |
5923 | enum machine_mode index_mode = TYPE_MODE (TREE_TYPE (index)); | |
7308a047 RS |
5924 | rtx rlow; |
5925 | rtx diff, quo, rem, addr, bit, result; | |
7308a047 | 5926 | |
d6a5ac33 RK |
5927 | preexpand_calls (exp); |
5928 | ||
5929 | /* If domain is empty, answer is no. Likewise if index is constant | |
5930 | and out of bounds. */ | |
51723711 | 5931 | if (((TREE_CODE (set_high_bound) == INTEGER_CST |
d6a5ac33 | 5932 | && TREE_CODE (set_low_bound) == INTEGER_CST |
51723711 | 5933 | && tree_int_cst_lt (set_high_bound, set_low_bound)) |
d6a5ac33 RK |
5934 | || (TREE_CODE (index) == INTEGER_CST |
5935 | && TREE_CODE (set_low_bound) == INTEGER_CST | |
5936 | && tree_int_cst_lt (index, set_low_bound)) | |
5937 | || (TREE_CODE (set_high_bound) == INTEGER_CST | |
5938 | && TREE_CODE (index) == INTEGER_CST | |
5939 | && tree_int_cst_lt (set_high_bound, index)))) | |
7308a047 RS |
5940 | return const0_rtx; |
5941 | ||
d6a5ac33 RK |
5942 | if (target == 0) |
5943 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); | |
7308a047 RS |
5944 | |
5945 | /* If we get here, we have to generate the code for both cases | |
5946 | (in range and out of range). */ | |
5947 | ||
5948 | op0 = gen_label_rtx (); | |
5949 | op1 = gen_label_rtx (); | |
5950 | ||
5951 | if (! (GET_CODE (index_val) == CONST_INT | |
5952 | && GET_CODE (lo_r) == CONST_INT)) | |
5953 | { | |
17938e57 | 5954 | emit_cmp_insn (index_val, lo_r, LT, NULL_RTX, |
d6a5ac33 | 5955 | GET_MODE (index_val), iunsignedp, 0); |
7308a047 RS |
5956 | emit_jump_insn (gen_blt (op1)); |
5957 | } | |
5958 | ||
5959 | if (! (GET_CODE (index_val) == CONST_INT | |
5960 | && GET_CODE (hi_r) == CONST_INT)) | |
5961 | { | |
17938e57 | 5962 | emit_cmp_insn (index_val, hi_r, GT, NULL_RTX, |
d6a5ac33 | 5963 | GET_MODE (index_val), iunsignedp, 0); |
7308a047 RS |
5964 | emit_jump_insn (gen_bgt (op1)); |
5965 | } | |
5966 | ||
5967 | /* Calculate the element number of bit zero in the first word | |
5968 | of the set. */ | |
5969 | if (GET_CODE (lo_r) == CONST_INT) | |
17938e57 RK |
5970 | rlow = GEN_INT (INTVAL (lo_r) |
5971 | & ~ ((HOST_WIDE_INT) 1 << BITS_PER_UNIT)); | |
7308a047 | 5972 | else |
17938e57 RK |
5973 | rlow = expand_binop (index_mode, and_optab, lo_r, |
5974 | GEN_INT (~((HOST_WIDE_INT) 1 << BITS_PER_UNIT)), | |
d6a5ac33 | 5975 | NULL_RTX, iunsignedp, OPTAB_LIB_WIDEN); |
7308a047 | 5976 | |
d6a5ac33 RK |
5977 | diff = expand_binop (index_mode, sub_optab, index_val, rlow, |
5978 | NULL_RTX, iunsignedp, OPTAB_LIB_WIDEN); | |
7308a047 RS |
5979 | |
5980 | quo = expand_divmod (0, TRUNC_DIV_EXPR, index_mode, diff, | |
d6a5ac33 | 5981 | GEN_INT (BITS_PER_UNIT), NULL_RTX, iunsignedp); |
7308a047 | 5982 | rem = expand_divmod (1, TRUNC_MOD_EXPR, index_mode, index_val, |
d6a5ac33 RK |
5983 | GEN_INT (BITS_PER_UNIT), NULL_RTX, iunsignedp); |
5984 | ||
7308a047 | 5985 | addr = memory_address (byte_mode, |
d6a5ac33 RK |
5986 | expand_binop (index_mode, add_optab, diff, |
5987 | setaddr, NULL_RTX, iunsignedp, | |
17938e57 | 5988 | OPTAB_LIB_WIDEN)); |
d6a5ac33 | 5989 | |
7308a047 RS |
5990 | /* Extract the bit we want to examine */ |
5991 | bit = expand_shift (RSHIFT_EXPR, byte_mode, | |
38a448ca | 5992 | gen_rtx_MEM (byte_mode, addr), |
17938e57 RK |
5993 | make_tree (TREE_TYPE (index), rem), |
5994 | NULL_RTX, 1); | |
5995 | result = expand_binop (byte_mode, and_optab, bit, const1_rtx, | |
5996 | GET_MODE (target) == byte_mode ? target : 0, | |
7308a047 | 5997 | 1, OPTAB_LIB_WIDEN); |
17938e57 RK |
5998 | |
5999 | if (result != target) | |
6000 | convert_move (target, result, 1); | |
7308a047 RS |
6001 | |
6002 | /* Output the code to handle the out-of-range case. */ | |
6003 | emit_jump (op0); | |
6004 | emit_label (op1); | |
6005 | emit_move_insn (target, const0_rtx); | |
6006 | emit_label (op0); | |
6007 | return target; | |
6008 | } | |
6009 | ||
bbf6f052 RK |
6010 | case WITH_CLEANUP_EXPR: |
6011 | if (RTL_EXPR_RTL (exp) == 0) | |
6012 | { | |
6013 | RTL_EXPR_RTL (exp) | |
921b3427 | 6014 | = expand_expr (TREE_OPERAND (exp, 0), target, tmode, ro_modifier); |
e976b8b2 MS |
6015 | expand_decl_cleanup (NULL_TREE, TREE_OPERAND (exp, 2)); |
6016 | ||
bbf6f052 RK |
6017 | /* That's it for this cleanup. */ |
6018 | TREE_OPERAND (exp, 2) = 0; | |
6019 | } | |
6020 | return RTL_EXPR_RTL (exp); | |
6021 | ||
5dab5552 MS |
6022 | case CLEANUP_POINT_EXPR: |
6023 | { | |
d93d4205 | 6024 | extern int temp_slot_level; |
e976b8b2 MS |
6025 | /* Start a new binding layer that will keep track of all cleanup |
6026 | actions to be performed. */ | |
6027 | expand_start_bindings (0); | |
6028 | ||
d93d4205 | 6029 | target_temp_slot_level = temp_slot_level; |
e976b8b2 | 6030 | |
921b3427 | 6031 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, tmode, ro_modifier); |
f283f66b JM |
6032 | /* If we're going to use this value, load it up now. */ |
6033 | if (! ignore) | |
6034 | op0 = force_not_mem (op0); | |
d93d4205 | 6035 | preserve_temp_slots (op0); |
e976b8b2 | 6036 | expand_end_bindings (NULL_TREE, 0, 0); |
5dab5552 MS |
6037 | } |
6038 | return op0; | |
6039 | ||
bbf6f052 RK |
6040 | case CALL_EXPR: |
6041 | /* Check for a built-in function. */ | |
6042 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR | |
d6a5ac33 RK |
6043 | && (TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)) |
6044 | == FUNCTION_DECL) | |
bbf6f052 RK |
6045 | && DECL_BUILT_IN (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) |
6046 | return expand_builtin (exp, target, subtarget, tmode, ignore); | |
d6a5ac33 | 6047 | |
bbf6f052 RK |
6048 | /* If this call was expanded already by preexpand_calls, |
6049 | just return the result we got. */ | |
6050 | if (CALL_EXPR_RTL (exp) != 0) | |
6051 | return CALL_EXPR_RTL (exp); | |
d6a5ac33 | 6052 | |
8129842c | 6053 | return expand_call (exp, target, ignore); |
bbf6f052 RK |
6054 | |
6055 | case NON_LVALUE_EXPR: | |
6056 | case NOP_EXPR: | |
6057 | case CONVERT_EXPR: | |
6058 | case REFERENCE_EXPR: | |
bbf6f052 RK |
6059 | if (TREE_CODE (type) == UNION_TYPE) |
6060 | { | |
6061 | tree valtype = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
6062 | if (target == 0) | |
06089a8b RK |
6063 | { |
6064 | if (mode != BLKmode) | |
6065 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); | |
6066 | else | |
6067 | target = assign_temp (type, 0, 1, 1); | |
6068 | } | |
d6a5ac33 | 6069 | |
bbf6f052 RK |
6070 | if (GET_CODE (target) == MEM) |
6071 | /* Store data into beginning of memory target. */ | |
6072 | store_expr (TREE_OPERAND (exp, 0), | |
1499e0a8 RK |
6073 | change_address (target, TYPE_MODE (valtype), 0), 0); |
6074 | ||
bbf6f052 RK |
6075 | else if (GET_CODE (target) == REG) |
6076 | /* Store this field into a union of the proper type. */ | |
6077 | store_field (target, GET_MODE_BITSIZE (TYPE_MODE (valtype)), 0, | |
6078 | TYPE_MODE (valtype), TREE_OPERAND (exp, 0), | |
6079 | VOIDmode, 0, 1, | |
6080 | int_size_in_bytes (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
6081 | else | |
6082 | abort (); | |
6083 | ||
6084 | /* Return the entire union. */ | |
6085 | return target; | |
6086 | } | |
d6a5ac33 | 6087 | |
7f62854a RK |
6088 | if (mode == TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
6089 | { | |
6090 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, VOIDmode, | |
921b3427 | 6091 | ro_modifier); |
7f62854a RK |
6092 | |
6093 | /* If the signedness of the conversion differs and OP0 is | |
6094 | a promoted SUBREG, clear that indication since we now | |
6095 | have to do the proper extension. */ | |
6096 | if (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))) != unsignedp | |
6097 | && GET_CODE (op0) == SUBREG) | |
6098 | SUBREG_PROMOTED_VAR_P (op0) = 0; | |
6099 | ||
6100 | return op0; | |
6101 | } | |
6102 | ||
1499e0a8 | 6103 | op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, mode, 0); |
12342f90 RS |
6104 | if (GET_MODE (op0) == mode) |
6105 | return op0; | |
12342f90 | 6106 | |
d6a5ac33 RK |
6107 | /* If OP0 is a constant, just convert it into the proper mode. */ |
6108 | if (CONSTANT_P (op0)) | |
6109 | return | |
6110 | convert_modes (mode, TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))), | |
6111 | op0, TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
12342f90 | 6112 | |
26fcb35a | 6113 | if (modifier == EXPAND_INITIALIZER) |
38a448ca | 6114 | return gen_rtx_fmt_e (unsignedp ? ZERO_EXTEND : SIGN_EXTEND, mode, op0); |
d6a5ac33 | 6115 | |
bbf6f052 | 6116 | if (target == 0) |
d6a5ac33 RK |
6117 | return |
6118 | convert_to_mode (mode, op0, | |
6119 | TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
bbf6f052 | 6120 | else |
d6a5ac33 RK |
6121 | convert_move (target, op0, |
6122 | TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
bbf6f052 RK |
6123 | return target; |
6124 | ||
6125 | case PLUS_EXPR: | |
0f41302f MS |
6126 | /* We come here from MINUS_EXPR when the second operand is a |
6127 | constant. */ | |
bbf6f052 RK |
6128 | plus_expr: |
6129 | this_optab = add_optab; | |
6130 | ||
6131 | /* If we are adding a constant, an RTL_EXPR that is sp, fp, or ap, and | |
6132 | something else, make sure we add the register to the constant and | |
6133 | then to the other thing. This case can occur during strength | |
6134 | reduction and doing it this way will produce better code if the | |
6135 | frame pointer or argument pointer is eliminated. | |
6136 | ||
6137 | fold-const.c will ensure that the constant is always in the inner | |
6138 | PLUS_EXPR, so the only case we need to do anything about is if | |
6139 | sp, ap, or fp is our second argument, in which case we must swap | |
6140 | the innermost first argument and our second argument. */ | |
6141 | ||
6142 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == PLUS_EXPR | |
6143 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 1)) == INTEGER_CST | |
6144 | && TREE_CODE (TREE_OPERAND (exp, 1)) == RTL_EXPR | |
6145 | && (RTL_EXPR_RTL (TREE_OPERAND (exp, 1)) == frame_pointer_rtx | |
6146 | || RTL_EXPR_RTL (TREE_OPERAND (exp, 1)) == stack_pointer_rtx | |
6147 | || RTL_EXPR_RTL (TREE_OPERAND (exp, 1)) == arg_pointer_rtx)) | |
6148 | { | |
6149 | tree t = TREE_OPERAND (exp, 1); | |
6150 | ||
6151 | TREE_OPERAND (exp, 1) = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
6152 | TREE_OPERAND (TREE_OPERAND (exp, 0), 0) = t; | |
6153 | } | |
6154 | ||
88f63c77 | 6155 | /* If the result is to be ptr_mode and we are adding an integer to |
bbf6f052 RK |
6156 | something, we might be forming a constant. So try to use |
6157 | plus_constant. If it produces a sum and we can't accept it, | |
6158 | use force_operand. This allows P = &ARR[const] to generate | |
6159 | efficient code on machines where a SYMBOL_REF is not a valid | |
6160 | address. | |
6161 | ||
6162 | If this is an EXPAND_SUM call, always return the sum. */ | |
c980ac49 | 6163 | if (modifier == EXPAND_SUM || modifier == EXPAND_INITIALIZER |
88f63c77 | 6164 | || mode == ptr_mode) |
bbf6f052 | 6165 | { |
c980ac49 RS |
6166 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == INTEGER_CST |
6167 | && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT | |
6168 | && TREE_CONSTANT (TREE_OPERAND (exp, 1))) | |
6169 | { | |
6170 | op1 = expand_expr (TREE_OPERAND (exp, 1), subtarget, VOIDmode, | |
6171 | EXPAND_SUM); | |
6172 | op1 = plus_constant (op1, TREE_INT_CST_LOW (TREE_OPERAND (exp, 0))); | |
6173 | if (modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER) | |
6174 | op1 = force_operand (op1, target); | |
6175 | return op1; | |
6176 | } | |
bbf6f052 | 6177 | |
c980ac49 RS |
6178 | else if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST |
6179 | && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_INT | |
6180 | && TREE_CONSTANT (TREE_OPERAND (exp, 0))) | |
6181 | { | |
6182 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, | |
6183 | EXPAND_SUM); | |
6184 | if (! CONSTANT_P (op0)) | |
6185 | { | |
6186 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, | |
6187 | VOIDmode, modifier); | |
709f5be1 RS |
6188 | /* Don't go to both_summands if modifier |
6189 | says it's not right to return a PLUS. */ | |
6190 | if (modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER) | |
6191 | goto binop2; | |
c980ac49 RS |
6192 | goto both_summands; |
6193 | } | |
6194 | op0 = plus_constant (op0, TREE_INT_CST_LOW (TREE_OPERAND (exp, 1))); | |
6195 | if (modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER) | |
6196 | op0 = force_operand (op0, target); | |
6197 | return op0; | |
6198 | } | |
bbf6f052 RK |
6199 | } |
6200 | ||
6201 | /* No sense saving up arithmetic to be done | |
6202 | if it's all in the wrong mode to form part of an address. | |
6203 | And force_operand won't know whether to sign-extend or | |
6204 | zero-extend. */ | |
6205 | if ((modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER) | |
88f63c77 | 6206 | || mode != ptr_mode) |
c980ac49 | 6207 | goto binop; |
bbf6f052 RK |
6208 | |
6209 | preexpand_calls (exp); | |
e5e809f4 | 6210 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6211 | subtarget = 0; |
6212 | ||
921b3427 RK |
6213 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, ro_modifier); |
6214 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, ro_modifier); | |
bbf6f052 | 6215 | |
c980ac49 | 6216 | both_summands: |
bbf6f052 RK |
6217 | /* Make sure any term that's a sum with a constant comes last. */ |
6218 | if (GET_CODE (op0) == PLUS | |
6219 | && CONSTANT_P (XEXP (op0, 1))) | |
6220 | { | |
6221 | temp = op0; | |
6222 | op0 = op1; | |
6223 | op1 = temp; | |
6224 | } | |
6225 | /* If adding to a sum including a constant, | |
6226 | associate it to put the constant outside. */ | |
6227 | if (GET_CODE (op1) == PLUS | |
6228 | && CONSTANT_P (XEXP (op1, 1))) | |
6229 | { | |
6230 | rtx constant_term = const0_rtx; | |
6231 | ||
6232 | temp = simplify_binary_operation (PLUS, mode, XEXP (op1, 0), op0); | |
6233 | if (temp != 0) | |
6234 | op0 = temp; | |
6f90e075 JW |
6235 | /* Ensure that MULT comes first if there is one. */ |
6236 | else if (GET_CODE (op0) == MULT) | |
38a448ca | 6237 | op0 = gen_rtx_PLUS (mode, op0, XEXP (op1, 0)); |
bbf6f052 | 6238 | else |
38a448ca | 6239 | op0 = gen_rtx_PLUS (mode, XEXP (op1, 0), op0); |
bbf6f052 RK |
6240 | |
6241 | /* Let's also eliminate constants from op0 if possible. */ | |
6242 | op0 = eliminate_constant_term (op0, &constant_term); | |
6243 | ||
6244 | /* CONSTANT_TERM and XEXP (op1, 1) are known to be constant, so | |
6245 | their sum should be a constant. Form it into OP1, since the | |
6246 | result we want will then be OP0 + OP1. */ | |
6247 | ||
6248 | temp = simplify_binary_operation (PLUS, mode, constant_term, | |
6249 | XEXP (op1, 1)); | |
6250 | if (temp != 0) | |
6251 | op1 = temp; | |
6252 | else | |
38a448ca | 6253 | op1 = gen_rtx_PLUS (mode, constant_term, XEXP (op1, 1)); |
bbf6f052 RK |
6254 | } |
6255 | ||
6256 | /* Put a constant term last and put a multiplication first. */ | |
6257 | if (CONSTANT_P (op0) || GET_CODE (op1) == MULT) | |
6258 | temp = op1, op1 = op0, op0 = temp; | |
6259 | ||
6260 | temp = simplify_binary_operation (PLUS, mode, op0, op1); | |
38a448ca | 6261 | return temp ? temp : gen_rtx_PLUS (mode, op0, op1); |
bbf6f052 RK |
6262 | |
6263 | case MINUS_EXPR: | |
ea87523e RK |
6264 | /* For initializers, we are allowed to return a MINUS of two |
6265 | symbolic constants. Here we handle all cases when both operands | |
6266 | are constant. */ | |
bbf6f052 RK |
6267 | /* Handle difference of two symbolic constants, |
6268 | for the sake of an initializer. */ | |
6269 | if ((modifier == EXPAND_SUM || modifier == EXPAND_INITIALIZER) | |
6270 | && really_constant_p (TREE_OPERAND (exp, 0)) | |
6271 | && really_constant_p (TREE_OPERAND (exp, 1))) | |
6272 | { | |
906c4e36 | 6273 | rtx op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, |
921b3427 | 6274 | VOIDmode, ro_modifier); |
906c4e36 | 6275 | rtx op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, |
921b3427 | 6276 | VOIDmode, ro_modifier); |
ea87523e | 6277 | |
ea87523e RK |
6278 | /* If the last operand is a CONST_INT, use plus_constant of |
6279 | the negated constant. Else make the MINUS. */ | |
6280 | if (GET_CODE (op1) == CONST_INT) | |
6281 | return plus_constant (op0, - INTVAL (op1)); | |
6282 | else | |
38a448ca | 6283 | return gen_rtx_MINUS (mode, op0, op1); |
bbf6f052 RK |
6284 | } |
6285 | /* Convert A - const to A + (-const). */ | |
6286 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST) | |
6287 | { | |
ae431183 RK |
6288 | tree negated = fold (build1 (NEGATE_EXPR, type, |
6289 | TREE_OPERAND (exp, 1))); | |
6290 | ||
6291 | /* Deal with the case where we can't negate the constant | |
6292 | in TYPE. */ | |
6293 | if (TREE_UNSIGNED (type) || TREE_OVERFLOW (negated)) | |
6294 | { | |
6295 | tree newtype = signed_type (type); | |
6296 | tree newop0 = convert (newtype, TREE_OPERAND (exp, 0)); | |
6297 | tree newop1 = convert (newtype, TREE_OPERAND (exp, 1)); | |
6298 | tree newneg = fold (build1 (NEGATE_EXPR, newtype, newop1)); | |
6299 | ||
6300 | if (! TREE_OVERFLOW (newneg)) | |
6301 | return expand_expr (convert (type, | |
6302 | build (PLUS_EXPR, newtype, | |
6303 | newop0, newneg)), | |
921b3427 | 6304 | target, tmode, ro_modifier); |
ae431183 RK |
6305 | } |
6306 | else | |
6307 | { | |
6308 | exp = build (PLUS_EXPR, type, TREE_OPERAND (exp, 0), negated); | |
6309 | goto plus_expr; | |
6310 | } | |
bbf6f052 RK |
6311 | } |
6312 | this_optab = sub_optab; | |
6313 | goto binop; | |
6314 | ||
6315 | case MULT_EXPR: | |
6316 | preexpand_calls (exp); | |
6317 | /* If first operand is constant, swap them. | |
6318 | Thus the following special case checks need only | |
6319 | check the second operand. */ | |
6320 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == INTEGER_CST) | |
6321 | { | |
6322 | register tree t1 = TREE_OPERAND (exp, 0); | |
6323 | TREE_OPERAND (exp, 0) = TREE_OPERAND (exp, 1); | |
6324 | TREE_OPERAND (exp, 1) = t1; | |
6325 | } | |
6326 | ||
6327 | /* Attempt to return something suitable for generating an | |
6328 | indexed address, for machines that support that. */ | |
6329 | ||
88f63c77 | 6330 | if (modifier == EXPAND_SUM && mode == ptr_mode |
bbf6f052 | 6331 | && TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST |
906c4e36 | 6332 | && GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT) |
bbf6f052 | 6333 | { |
921b3427 RK |
6334 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, |
6335 | EXPAND_SUM); | |
bbf6f052 RK |
6336 | |
6337 | /* Apply distributive law if OP0 is x+c. */ | |
6338 | if (GET_CODE (op0) == PLUS | |
6339 | && GET_CODE (XEXP (op0, 1)) == CONST_INT) | |
38a448ca RH |
6340 | return gen_rtx_PLUS (mode, |
6341 | gen_rtx_MULT (mode, XEXP (op0, 0), | |
6342 | GEN_INT (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)))), | |
906c4e36 RK |
6343 | GEN_INT (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)) |
6344 | * INTVAL (XEXP (op0, 1)))); | |
bbf6f052 RK |
6345 | |
6346 | if (GET_CODE (op0) != REG) | |
906c4e36 | 6347 | op0 = force_operand (op0, NULL_RTX); |
bbf6f052 RK |
6348 | if (GET_CODE (op0) != REG) |
6349 | op0 = copy_to_mode_reg (mode, op0); | |
6350 | ||
38a448ca RH |
6351 | return gen_rtx_MULT (mode, op0, |
6352 | GEN_INT (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)))); | |
bbf6f052 RK |
6353 | } |
6354 | ||
e5e809f4 | 6355 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6356 | subtarget = 0; |
6357 | ||
6358 | /* Check for multiplying things that have been extended | |
6359 | from a narrower type. If this machine supports multiplying | |
6360 | in that narrower type with a result in the desired type, | |
6361 | do it that way, and avoid the explicit type-conversion. */ | |
6362 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == NOP_EXPR | |
6363 | && TREE_CODE (type) == INTEGER_TYPE | |
6364 | && (TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) | |
6365 | < TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
6366 | && ((TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST | |
6367 | && int_fits_type_p (TREE_OPERAND (exp, 1), | |
6368 | TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) | |
6369 | /* Don't use a widening multiply if a shift will do. */ | |
6370 | && ((GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 1)))) | |
906c4e36 | 6371 | > HOST_BITS_PER_WIDE_INT) |
bbf6f052 RK |
6372 | || exact_log2 (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1))) < 0)) |
6373 | || | |
6374 | (TREE_CODE (TREE_OPERAND (exp, 1)) == NOP_EXPR | |
6375 | && (TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 1), 0))) | |
6376 | == | |
6377 | TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)))) | |
6378 | /* If both operands are extended, they must either both | |
6379 | be zero-extended or both be sign-extended. */ | |
6380 | && (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 1), 0))) | |
6381 | == | |
6382 | TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))))))) | |
6383 | { | |
6384 | enum machine_mode innermode | |
6385 | = TYPE_MODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))); | |
b10af0c8 TG |
6386 | optab other_optab = (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) |
6387 | ? smul_widen_optab : umul_widen_optab); | |
bbf6f052 RK |
6388 | this_optab = (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))) |
6389 | ? umul_widen_optab : smul_widen_optab); | |
b10af0c8 | 6390 | if (mode == GET_MODE_WIDER_MODE (innermode)) |
bbf6f052 | 6391 | { |
b10af0c8 TG |
6392 | if (this_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing) |
6393 | { | |
6394 | op0 = expand_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), 0), | |
6395 | NULL_RTX, VOIDmode, 0); | |
6396 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST) | |
6397 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, | |
6398 | VOIDmode, 0); | |
6399 | else | |
6400 | op1 = expand_expr (TREE_OPERAND (TREE_OPERAND (exp, 1), 0), | |
6401 | NULL_RTX, VOIDmode, 0); | |
6402 | goto binop2; | |
6403 | } | |
6404 | else if (other_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing | |
6405 | && innermode == word_mode) | |
6406 | { | |
6407 | rtx htem; | |
6408 | op0 = expand_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), 0), | |
6409 | NULL_RTX, VOIDmode, 0); | |
6410 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST) | |
6411 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, | |
6412 | VOIDmode, 0); | |
6413 | else | |
6414 | op1 = expand_expr (TREE_OPERAND (TREE_OPERAND (exp, 1), 0), | |
6415 | NULL_RTX, VOIDmode, 0); | |
6416 | temp = expand_binop (mode, other_optab, op0, op1, target, | |
6417 | unsignedp, OPTAB_LIB_WIDEN); | |
6418 | htem = expand_mult_highpart_adjust (innermode, | |
6419 | gen_highpart (innermode, temp), | |
6420 | op0, op1, | |
6421 | gen_highpart (innermode, temp), | |
6422 | unsignedp); | |
6423 | emit_move_insn (gen_highpart (innermode, temp), htem); | |
6424 | return temp; | |
6425 | } | |
bbf6f052 RK |
6426 | } |
6427 | } | |
6428 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
906c4e36 | 6429 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6430 | return expand_mult (mode, op0, op1, target, unsignedp); |
6431 | ||
6432 | case TRUNC_DIV_EXPR: | |
6433 | case FLOOR_DIV_EXPR: | |
6434 | case CEIL_DIV_EXPR: | |
6435 | case ROUND_DIV_EXPR: | |
6436 | case EXACT_DIV_EXPR: | |
6437 | preexpand_calls (exp); | |
e5e809f4 | 6438 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6439 | subtarget = 0; |
6440 | /* Possible optimization: compute the dividend with EXPAND_SUM | |
6441 | then if the divisor is constant can optimize the case | |
6442 | where some terms of the dividend have coeffs divisible by it. */ | |
6443 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
906c4e36 | 6444 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6445 | return expand_divmod (0, code, mode, op0, op1, target, unsignedp); |
6446 | ||
6447 | case RDIV_EXPR: | |
6448 | this_optab = flodiv_optab; | |
6449 | goto binop; | |
6450 | ||
6451 | case TRUNC_MOD_EXPR: | |
6452 | case FLOOR_MOD_EXPR: | |
6453 | case CEIL_MOD_EXPR: | |
6454 | case ROUND_MOD_EXPR: | |
6455 | preexpand_calls (exp); | |
e5e809f4 | 6456 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6457 | subtarget = 0; |
6458 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
906c4e36 | 6459 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6460 | return expand_divmod (1, code, mode, op0, op1, target, unsignedp); |
6461 | ||
6462 | case FIX_ROUND_EXPR: | |
6463 | case FIX_FLOOR_EXPR: | |
6464 | case FIX_CEIL_EXPR: | |
6465 | abort (); /* Not used for C. */ | |
6466 | ||
6467 | case FIX_TRUNC_EXPR: | |
906c4e36 | 6468 | op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6469 | if (target == 0) |
6470 | target = gen_reg_rtx (mode); | |
6471 | expand_fix (target, op0, unsignedp); | |
6472 | return target; | |
6473 | ||
6474 | case FLOAT_EXPR: | |
906c4e36 | 6475 | op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6476 | if (target == 0) |
6477 | target = gen_reg_rtx (mode); | |
6478 | /* expand_float can't figure out what to do if FROM has VOIDmode. | |
6479 | So give it the correct mode. With -O, cse will optimize this. */ | |
6480 | if (GET_MODE (op0) == VOIDmode) | |
6481 | op0 = copy_to_mode_reg (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))), | |
6482 | op0); | |
6483 | expand_float (target, op0, | |
6484 | TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))); | |
6485 | return target; | |
6486 | ||
6487 | case NEGATE_EXPR: | |
5b22bee8 | 6488 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); |
bbf6f052 RK |
6489 | temp = expand_unop (mode, neg_optab, op0, target, 0); |
6490 | if (temp == 0) | |
6491 | abort (); | |
6492 | return temp; | |
6493 | ||
6494 | case ABS_EXPR: | |
6495 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
6496 | ||
2d7050fd | 6497 | /* Handle complex values specially. */ |
d6a5ac33 RK |
6498 | if (GET_MODE_CLASS (mode) == MODE_COMPLEX_INT |
6499 | || GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT) | |
6500 | return expand_complex_abs (mode, op0, target, unsignedp); | |
2d7050fd | 6501 | |
bbf6f052 RK |
6502 | /* Unsigned abs is simply the operand. Testing here means we don't |
6503 | risk generating incorrect code below. */ | |
6504 | if (TREE_UNSIGNED (type)) | |
6505 | return op0; | |
6506 | ||
2e5ec6cf | 6507 | return expand_abs (mode, op0, target, unsignedp, |
e5e809f4 | 6508 | safe_from_p (target, TREE_OPERAND (exp, 0), 1)); |
bbf6f052 RK |
6509 | |
6510 | case MAX_EXPR: | |
6511 | case MIN_EXPR: | |
6512 | target = original_target; | |
e5e809f4 | 6513 | if (target == 0 || ! safe_from_p (target, TREE_OPERAND (exp, 1), 1) |
fc155707 | 6514 | || (GET_CODE (target) == MEM && MEM_VOLATILE_P (target)) |
d6a5ac33 | 6515 | || GET_MODE (target) != mode |
bbf6f052 RK |
6516 | || (GET_CODE (target) == REG |
6517 | && REGNO (target) < FIRST_PSEUDO_REGISTER)) | |
6518 | target = gen_reg_rtx (mode); | |
906c4e36 | 6519 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6520 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, VOIDmode, 0); |
6521 | ||
6522 | /* First try to do it with a special MIN or MAX instruction. | |
6523 | If that does not win, use a conditional jump to select the proper | |
6524 | value. */ | |
6525 | this_optab = (TREE_UNSIGNED (type) | |
6526 | ? (code == MIN_EXPR ? umin_optab : umax_optab) | |
6527 | : (code == MIN_EXPR ? smin_optab : smax_optab)); | |
6528 | ||
6529 | temp = expand_binop (mode, this_optab, op0, op1, target, unsignedp, | |
6530 | OPTAB_WIDEN); | |
6531 | if (temp != 0) | |
6532 | return temp; | |
6533 | ||
fa2981d8 JW |
6534 | /* At this point, a MEM target is no longer useful; we will get better |
6535 | code without it. */ | |
6536 | ||
6537 | if (GET_CODE (target) == MEM) | |
6538 | target = gen_reg_rtx (mode); | |
6539 | ||
ee456b1c RK |
6540 | if (target != op0) |
6541 | emit_move_insn (target, op0); | |
d6a5ac33 | 6542 | |
bbf6f052 | 6543 | op0 = gen_label_rtx (); |
d6a5ac33 | 6544 | |
f81497d9 RS |
6545 | /* If this mode is an integer too wide to compare properly, |
6546 | compare word by word. Rely on cse to optimize constant cases. */ | |
d6a5ac33 | 6547 | if (GET_MODE_CLASS (mode) == MODE_INT && !can_compare_p (mode)) |
bbf6f052 | 6548 | { |
f81497d9 | 6549 | if (code == MAX_EXPR) |
d6a5ac33 RK |
6550 | do_jump_by_parts_greater_rtx (mode, TREE_UNSIGNED (type), |
6551 | target, op1, NULL_RTX, op0); | |
bbf6f052 | 6552 | else |
d6a5ac33 RK |
6553 | do_jump_by_parts_greater_rtx (mode, TREE_UNSIGNED (type), |
6554 | op1, target, NULL_RTX, op0); | |
ee456b1c | 6555 | emit_move_insn (target, op1); |
bbf6f052 | 6556 | } |
f81497d9 RS |
6557 | else |
6558 | { | |
6559 | if (code == MAX_EXPR) | |
6560 | temp = (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 1))) | |
ee456b1c RK |
6561 | ? compare_from_rtx (target, op1, GEU, 1, mode, NULL_RTX, 0) |
6562 | : compare_from_rtx (target, op1, GE, 0, mode, NULL_RTX, 0)); | |
f81497d9 RS |
6563 | else |
6564 | temp = (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 1))) | |
ee456b1c RK |
6565 | ? compare_from_rtx (target, op1, LEU, 1, mode, NULL_RTX, 0) |
6566 | : compare_from_rtx (target, op1, LE, 0, mode, NULL_RTX, 0)); | |
f81497d9 | 6567 | if (temp == const0_rtx) |
ee456b1c | 6568 | emit_move_insn (target, op1); |
f81497d9 RS |
6569 | else if (temp != const_true_rtx) |
6570 | { | |
6571 | if (bcc_gen_fctn[(int) GET_CODE (temp)] != 0) | |
6572 | emit_jump_insn ((*bcc_gen_fctn[(int) GET_CODE (temp)]) (op0)); | |
6573 | else | |
6574 | abort (); | |
ee456b1c | 6575 | emit_move_insn (target, op1); |
f81497d9 RS |
6576 | } |
6577 | } | |
bbf6f052 RK |
6578 | emit_label (op0); |
6579 | return target; | |
6580 | ||
bbf6f052 RK |
6581 | case BIT_NOT_EXPR: |
6582 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
6583 | temp = expand_unop (mode, one_cmpl_optab, op0, target, 1); | |
6584 | if (temp == 0) | |
6585 | abort (); | |
6586 | return temp; | |
6587 | ||
6588 | case FFS_EXPR: | |
6589 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
6590 | temp = expand_unop (mode, ffs_optab, op0, target, 1); | |
6591 | if (temp == 0) | |
6592 | abort (); | |
6593 | return temp; | |
6594 | ||
d6a5ac33 RK |
6595 | /* ??? Can optimize bitwise operations with one arg constant. |
6596 | Can optimize (a bitwise1 n) bitwise2 (a bitwise3 b) | |
6597 | and (a bitwise1 b) bitwise2 b (etc) | |
6598 | but that is probably not worth while. */ | |
6599 | ||
6600 | /* BIT_AND_EXPR is for bitwise anding. TRUTH_AND_EXPR is for anding two | |
6601 | boolean values when we want in all cases to compute both of them. In | |
6602 | general it is fastest to do TRUTH_AND_EXPR by computing both operands | |
6603 | as actual zero-or-1 values and then bitwise anding. In cases where | |
6604 | there cannot be any side effects, better code would be made by | |
6605 | treating TRUTH_AND_EXPR like TRUTH_ANDIF_EXPR; but the question is | |
6606 | how to recognize those cases. */ | |
6607 | ||
bbf6f052 RK |
6608 | case TRUTH_AND_EXPR: |
6609 | case BIT_AND_EXPR: | |
6610 | this_optab = and_optab; | |
6611 | goto binop; | |
6612 | ||
bbf6f052 RK |
6613 | case TRUTH_OR_EXPR: |
6614 | case BIT_IOR_EXPR: | |
6615 | this_optab = ior_optab; | |
6616 | goto binop; | |
6617 | ||
874726a8 | 6618 | case TRUTH_XOR_EXPR: |
bbf6f052 RK |
6619 | case BIT_XOR_EXPR: |
6620 | this_optab = xor_optab; | |
6621 | goto binop; | |
6622 | ||
6623 | case LSHIFT_EXPR: | |
6624 | case RSHIFT_EXPR: | |
6625 | case LROTATE_EXPR: | |
6626 | case RROTATE_EXPR: | |
6627 | preexpand_calls (exp); | |
e5e809f4 | 6628 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6629 | subtarget = 0; |
6630 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
6631 | return expand_shift (code, mode, op0, TREE_OPERAND (exp, 1), target, | |
6632 | unsignedp); | |
6633 | ||
d6a5ac33 RK |
6634 | /* Could determine the answer when only additive constants differ. Also, |
6635 | the addition of one can be handled by changing the condition. */ | |
bbf6f052 RK |
6636 | case LT_EXPR: |
6637 | case LE_EXPR: | |
6638 | case GT_EXPR: | |
6639 | case GE_EXPR: | |
6640 | case EQ_EXPR: | |
6641 | case NE_EXPR: | |
6642 | preexpand_calls (exp); | |
6643 | temp = do_store_flag (exp, target, tmode != VOIDmode ? tmode : mode, 0); | |
6644 | if (temp != 0) | |
6645 | return temp; | |
d6a5ac33 | 6646 | |
0f41302f | 6647 | /* For foo != 0, load foo, and if it is nonzero load 1 instead. */ |
bbf6f052 RK |
6648 | if (code == NE_EXPR && integer_zerop (TREE_OPERAND (exp, 1)) |
6649 | && original_target | |
6650 | && GET_CODE (original_target) == REG | |
6651 | && (GET_MODE (original_target) | |
6652 | == TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
6653 | { | |
d6a5ac33 RK |
6654 | temp = expand_expr (TREE_OPERAND (exp, 0), original_target, |
6655 | VOIDmode, 0); | |
6656 | ||
bbf6f052 RK |
6657 | if (temp != original_target) |
6658 | temp = copy_to_reg (temp); | |
d6a5ac33 | 6659 | |
bbf6f052 | 6660 | op1 = gen_label_rtx (); |
906c4e36 | 6661 | emit_cmp_insn (temp, const0_rtx, EQ, NULL_RTX, |
bbf6f052 RK |
6662 | GET_MODE (temp), unsignedp, 0); |
6663 | emit_jump_insn (gen_beq (op1)); | |
6664 | emit_move_insn (temp, const1_rtx); | |
6665 | emit_label (op1); | |
6666 | return temp; | |
6667 | } | |
d6a5ac33 | 6668 | |
bbf6f052 RK |
6669 | /* If no set-flag instruction, must generate a conditional |
6670 | store into a temporary variable. Drop through | |
6671 | and handle this like && and ||. */ | |
6672 | ||
6673 | case TRUTH_ANDIF_EXPR: | |
6674 | case TRUTH_ORIF_EXPR: | |
e44842fe | 6675 | if (! ignore |
e5e809f4 | 6676 | && (target == 0 || ! safe_from_p (target, exp, 1) |
e44842fe RK |
6677 | /* Make sure we don't have a hard reg (such as function's return |
6678 | value) live across basic blocks, if not optimizing. */ | |
6679 | || (!optimize && GET_CODE (target) == REG | |
6680 | && REGNO (target) < FIRST_PSEUDO_REGISTER))) | |
bbf6f052 | 6681 | target = gen_reg_rtx (tmode != VOIDmode ? tmode : mode); |
e44842fe RK |
6682 | |
6683 | if (target) | |
6684 | emit_clr_insn (target); | |
6685 | ||
bbf6f052 RK |
6686 | op1 = gen_label_rtx (); |
6687 | jumpifnot (exp, op1); | |
e44842fe RK |
6688 | |
6689 | if (target) | |
6690 | emit_0_to_1_insn (target); | |
6691 | ||
bbf6f052 | 6692 | emit_label (op1); |
e44842fe | 6693 | return ignore ? const0_rtx : target; |
bbf6f052 RK |
6694 | |
6695 | case TRUTH_NOT_EXPR: | |
6696 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, VOIDmode, 0); | |
6697 | /* The parser is careful to generate TRUTH_NOT_EXPR | |
6698 | only with operands that are always zero or one. */ | |
906c4e36 | 6699 | temp = expand_binop (mode, xor_optab, op0, const1_rtx, |
bbf6f052 RK |
6700 | target, 1, OPTAB_LIB_WIDEN); |
6701 | if (temp == 0) | |
6702 | abort (); | |
6703 | return temp; | |
6704 | ||
6705 | case COMPOUND_EXPR: | |
6706 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, 0); | |
6707 | emit_queue (); | |
6708 | return expand_expr (TREE_OPERAND (exp, 1), | |
6709 | (ignore ? const0_rtx : target), | |
6710 | VOIDmode, 0); | |
6711 | ||
6712 | case COND_EXPR: | |
ac01eace RK |
6713 | /* If we would have a "singleton" (see below) were it not for a |
6714 | conversion in each arm, bring that conversion back out. */ | |
6715 | if (TREE_CODE (TREE_OPERAND (exp, 1)) == NOP_EXPR | |
6716 | && TREE_CODE (TREE_OPERAND (exp, 2)) == NOP_EXPR | |
6717 | && (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 1), 0)) | |
6718 | == TREE_TYPE (TREE_OPERAND (TREE_OPERAND (exp, 2), 0)))) | |
6719 | { | |
6720 | tree true = TREE_OPERAND (TREE_OPERAND (exp, 1), 0); | |
6721 | tree false = TREE_OPERAND (TREE_OPERAND (exp, 2), 0); | |
6722 | ||
6723 | if ((TREE_CODE_CLASS (TREE_CODE (true)) == '2' | |
6724 | && operand_equal_p (false, TREE_OPERAND (true, 0), 0)) | |
6725 | || (TREE_CODE_CLASS (TREE_CODE (false)) == '2' | |
6726 | && operand_equal_p (true, TREE_OPERAND (false, 0), 0)) | |
6727 | || (TREE_CODE_CLASS (TREE_CODE (true)) == '1' | |
6728 | && operand_equal_p (false, TREE_OPERAND (true, 0), 0)) | |
6729 | || (TREE_CODE_CLASS (TREE_CODE (false)) == '1' | |
6730 | && operand_equal_p (true, TREE_OPERAND (false, 0), 0))) | |
6731 | return expand_expr (build1 (NOP_EXPR, type, | |
6732 | build (COND_EXPR, TREE_TYPE (true), | |
6733 | TREE_OPERAND (exp, 0), | |
6734 | true, false)), | |
6735 | target, tmode, modifier); | |
6736 | } | |
6737 | ||
bbf6f052 RK |
6738 | { |
6739 | /* Note that COND_EXPRs whose type is a structure or union | |
6740 | are required to be constructed to contain assignments of | |
6741 | a temporary variable, so that we can evaluate them here | |
6742 | for side effect only. If type is void, we must do likewise. */ | |
6743 | ||
6744 | /* If an arm of the branch requires a cleanup, | |
6745 | only that cleanup is performed. */ | |
6746 | ||
6747 | tree singleton = 0; | |
6748 | tree binary_op = 0, unary_op = 0; | |
bbf6f052 RK |
6749 | |
6750 | /* If this is (A ? 1 : 0) and A is a condition, just evaluate it and | |
6751 | convert it to our mode, if necessary. */ | |
6752 | if (integer_onep (TREE_OPERAND (exp, 1)) | |
6753 | && integer_zerop (TREE_OPERAND (exp, 2)) | |
6754 | && TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == '<') | |
6755 | { | |
dd27116b RK |
6756 | if (ignore) |
6757 | { | |
6758 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, | |
921b3427 | 6759 | ro_modifier); |
dd27116b RK |
6760 | return const0_rtx; |
6761 | } | |
6762 | ||
921b3427 | 6763 | op0 = expand_expr (TREE_OPERAND (exp, 0), target, mode, ro_modifier); |
bbf6f052 RK |
6764 | if (GET_MODE (op0) == mode) |
6765 | return op0; | |
d6a5ac33 | 6766 | |
bbf6f052 RK |
6767 | if (target == 0) |
6768 | target = gen_reg_rtx (mode); | |
6769 | convert_move (target, op0, unsignedp); | |
6770 | return target; | |
6771 | } | |
6772 | ||
ac01eace RK |
6773 | /* Check for X ? A + B : A. If we have this, we can copy A to the |
6774 | output and conditionally add B. Similarly for unary operations. | |
6775 | Don't do this if X has side-effects because those side effects | |
6776 | might affect A or B and the "?" operation is a sequence point in | |
6777 | ANSI. (operand_equal_p tests for side effects.) */ | |
bbf6f052 RK |
6778 | |
6779 | if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 1))) == '2' | |
6780 | && operand_equal_p (TREE_OPERAND (exp, 2), | |
6781 | TREE_OPERAND (TREE_OPERAND (exp, 1), 0), 0)) | |
6782 | singleton = TREE_OPERAND (exp, 2), binary_op = TREE_OPERAND (exp, 1); | |
6783 | else if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 2))) == '2' | |
6784 | && operand_equal_p (TREE_OPERAND (exp, 1), | |
6785 | TREE_OPERAND (TREE_OPERAND (exp, 2), 0), 0)) | |
6786 | singleton = TREE_OPERAND (exp, 1), binary_op = TREE_OPERAND (exp, 2); | |
6787 | else if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 1))) == '1' | |
6788 | && operand_equal_p (TREE_OPERAND (exp, 2), | |
6789 | TREE_OPERAND (TREE_OPERAND (exp, 1), 0), 0)) | |
6790 | singleton = TREE_OPERAND (exp, 2), unary_op = TREE_OPERAND (exp, 1); | |
6791 | else if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 2))) == '1' | |
6792 | && operand_equal_p (TREE_OPERAND (exp, 1), | |
6793 | TREE_OPERAND (TREE_OPERAND (exp, 2), 0), 0)) | |
6794 | singleton = TREE_OPERAND (exp, 1), unary_op = TREE_OPERAND (exp, 2); | |
6795 | ||
01c8a7c8 RK |
6796 | /* If we are not to produce a result, we have no target. Otherwise, |
6797 | if a target was specified use it; it will not be used as an | |
6798 | intermediate target unless it is safe. If no target, use a | |
6799 | temporary. */ | |
6800 | ||
6801 | if (ignore) | |
6802 | temp = 0; | |
6803 | else if (original_target | |
e5e809f4 | 6804 | && (safe_from_p (original_target, TREE_OPERAND (exp, 0), 1) |
01c8a7c8 RK |
6805 | || (singleton && GET_CODE (original_target) == REG |
6806 | && REGNO (original_target) >= FIRST_PSEUDO_REGISTER | |
6807 | && original_target == var_rtx (singleton))) | |
6808 | && GET_MODE (original_target) == mode | |
7c00d1fe RK |
6809 | #ifdef HAVE_conditional_move |
6810 | && (! can_conditionally_move_p (mode) | |
6811 | || GET_CODE (original_target) == REG | |
6812 | || TREE_ADDRESSABLE (type)) | |
6813 | #endif | |
01c8a7c8 RK |
6814 | && ! (GET_CODE (original_target) == MEM |
6815 | && MEM_VOLATILE_P (original_target))) | |
6816 | temp = original_target; | |
6817 | else if (TREE_ADDRESSABLE (type)) | |
6818 | abort (); | |
6819 | else | |
6820 | temp = assign_temp (type, 0, 0, 1); | |
6821 | ||
ac01eace RK |
6822 | /* If we had X ? A + C : A, with C a constant power of 2, and we can |
6823 | do the test of X as a store-flag operation, do this as | |
6824 | A + ((X != 0) << log C). Similarly for other simple binary | |
6825 | operators. Only do for C == 1 if BRANCH_COST is low. */ | |
dd27116b | 6826 | if (temp && singleton && binary_op |
bbf6f052 RK |
6827 | && (TREE_CODE (binary_op) == PLUS_EXPR |
6828 | || TREE_CODE (binary_op) == MINUS_EXPR | |
6829 | || TREE_CODE (binary_op) == BIT_IOR_EXPR | |
9fbd9f58 | 6830 | || TREE_CODE (binary_op) == BIT_XOR_EXPR) |
ac01eace RK |
6831 | && (BRANCH_COST >= 3 ? integer_pow2p (TREE_OPERAND (binary_op, 1)) |
6832 | : integer_onep (TREE_OPERAND (binary_op, 1))) | |
bbf6f052 RK |
6833 | && TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == '<') |
6834 | { | |
6835 | rtx result; | |
6836 | optab boptab = (TREE_CODE (binary_op) == PLUS_EXPR ? add_optab | |
6837 | : TREE_CODE (binary_op) == MINUS_EXPR ? sub_optab | |
6838 | : TREE_CODE (binary_op) == BIT_IOR_EXPR ? ior_optab | |
2d444001 | 6839 | : xor_optab); |
bbf6f052 RK |
6840 | |
6841 | /* If we had X ? A : A + 1, do this as A + (X == 0). | |
6842 | ||
6843 | We have to invert the truth value here and then put it | |
6844 | back later if do_store_flag fails. We cannot simply copy | |
6845 | TREE_OPERAND (exp, 0) to another variable and modify that | |
6846 | because invert_truthvalue can modify the tree pointed to | |
6847 | by its argument. */ | |
6848 | if (singleton == TREE_OPERAND (exp, 1)) | |
6849 | TREE_OPERAND (exp, 0) | |
6850 | = invert_truthvalue (TREE_OPERAND (exp, 0)); | |
6851 | ||
6852 | result = do_store_flag (TREE_OPERAND (exp, 0), | |
e5e809f4 | 6853 | (safe_from_p (temp, singleton, 1) |
906c4e36 | 6854 | ? temp : NULL_RTX), |
bbf6f052 RK |
6855 | mode, BRANCH_COST <= 1); |
6856 | ||
ac01eace RK |
6857 | if (result != 0 && ! integer_onep (TREE_OPERAND (binary_op, 1))) |
6858 | result = expand_shift (LSHIFT_EXPR, mode, result, | |
6859 | build_int_2 (tree_log2 | |
6860 | (TREE_OPERAND | |
6861 | (binary_op, 1)), | |
6862 | 0), | |
e5e809f4 | 6863 | (safe_from_p (temp, singleton, 1) |
ac01eace RK |
6864 | ? temp : NULL_RTX), 0); |
6865 | ||
bbf6f052 RK |
6866 | if (result) |
6867 | { | |
906c4e36 | 6868 | op1 = expand_expr (singleton, NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6869 | return expand_binop (mode, boptab, op1, result, temp, |
6870 | unsignedp, OPTAB_LIB_WIDEN); | |
6871 | } | |
6872 | else if (singleton == TREE_OPERAND (exp, 1)) | |
6873 | TREE_OPERAND (exp, 0) | |
6874 | = invert_truthvalue (TREE_OPERAND (exp, 0)); | |
6875 | } | |
6876 | ||
dabf8373 | 6877 | do_pending_stack_adjust (); |
bbf6f052 RK |
6878 | NO_DEFER_POP; |
6879 | op0 = gen_label_rtx (); | |
6880 | ||
6881 | if (singleton && ! TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 0))) | |
6882 | { | |
6883 | if (temp != 0) | |
6884 | { | |
6885 | /* If the target conflicts with the other operand of the | |
6886 | binary op, we can't use it. Also, we can't use the target | |
6887 | if it is a hard register, because evaluating the condition | |
6888 | might clobber it. */ | |
6889 | if ((binary_op | |
e5e809f4 | 6890 | && ! safe_from_p (temp, TREE_OPERAND (binary_op, 1), 1)) |
bbf6f052 RK |
6891 | || (GET_CODE (temp) == REG |
6892 | && REGNO (temp) < FIRST_PSEUDO_REGISTER)) | |
6893 | temp = gen_reg_rtx (mode); | |
6894 | store_expr (singleton, temp, 0); | |
6895 | } | |
6896 | else | |
906c4e36 | 6897 | expand_expr (singleton, |
2937cf87 | 6898 | ignore ? const0_rtx : NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6899 | if (singleton == TREE_OPERAND (exp, 1)) |
6900 | jumpif (TREE_OPERAND (exp, 0), op0); | |
6901 | else | |
6902 | jumpifnot (TREE_OPERAND (exp, 0), op0); | |
6903 | ||
956d6950 | 6904 | start_cleanup_deferral (); |
bbf6f052 RK |
6905 | if (binary_op && temp == 0) |
6906 | /* Just touch the other operand. */ | |
6907 | expand_expr (TREE_OPERAND (binary_op, 1), | |
906c4e36 | 6908 | ignore ? const0_rtx : NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
6909 | else if (binary_op) |
6910 | store_expr (build (TREE_CODE (binary_op), type, | |
6911 | make_tree (type, temp), | |
6912 | TREE_OPERAND (binary_op, 1)), | |
6913 | temp, 0); | |
6914 | else | |
6915 | store_expr (build1 (TREE_CODE (unary_op), type, | |
6916 | make_tree (type, temp)), | |
6917 | temp, 0); | |
6918 | op1 = op0; | |
bbf6f052 | 6919 | } |
bbf6f052 RK |
6920 | /* Check for A op 0 ? A : FOO and A op 0 ? FOO : A where OP is any |
6921 | comparison operator. If we have one of these cases, set the | |
6922 | output to A, branch on A (cse will merge these two references), | |
6923 | then set the output to FOO. */ | |
6924 | else if (temp | |
6925 | && TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == '<' | |
6926 | && integer_zerop (TREE_OPERAND (TREE_OPERAND (exp, 0), 1)) | |
6927 | && operand_equal_p (TREE_OPERAND (TREE_OPERAND (exp, 0), 0), | |
6928 | TREE_OPERAND (exp, 1), 0) | |
e9a25f70 JL |
6929 | && (! TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 0)) |
6930 | || TREE_CODE (TREE_OPERAND (exp, 1)) == SAVE_EXPR) | |
e5e809f4 | 6931 | && safe_from_p (temp, TREE_OPERAND (exp, 2), 1)) |
bbf6f052 RK |
6932 | { |
6933 | if (GET_CODE (temp) == REG && REGNO (temp) < FIRST_PSEUDO_REGISTER) | |
6934 | temp = gen_reg_rtx (mode); | |
6935 | store_expr (TREE_OPERAND (exp, 1), temp, 0); | |
6936 | jumpif (TREE_OPERAND (exp, 0), op0); | |
5dab5552 | 6937 | |
956d6950 | 6938 | start_cleanup_deferral (); |
bbf6f052 RK |
6939 | store_expr (TREE_OPERAND (exp, 2), temp, 0); |
6940 | op1 = op0; | |
6941 | } | |
6942 | else if (temp | |
6943 | && TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == '<' | |
6944 | && integer_zerop (TREE_OPERAND (TREE_OPERAND (exp, 0), 1)) | |
6945 | && operand_equal_p (TREE_OPERAND (TREE_OPERAND (exp, 0), 0), | |
6946 | TREE_OPERAND (exp, 2), 0) | |
e9a25f70 JL |
6947 | && (! TREE_SIDE_EFFECTS (TREE_OPERAND (exp, 0)) |
6948 | || TREE_CODE (TREE_OPERAND (exp, 2)) == SAVE_EXPR) | |
e5e809f4 | 6949 | && safe_from_p (temp, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
6950 | { |
6951 | if (GET_CODE (temp) == REG && REGNO (temp) < FIRST_PSEUDO_REGISTER) | |
6952 | temp = gen_reg_rtx (mode); | |
6953 | store_expr (TREE_OPERAND (exp, 2), temp, 0); | |
6954 | jumpifnot (TREE_OPERAND (exp, 0), op0); | |
5dab5552 | 6955 | |
956d6950 | 6956 | start_cleanup_deferral (); |
bbf6f052 RK |
6957 | store_expr (TREE_OPERAND (exp, 1), temp, 0); |
6958 | op1 = op0; | |
6959 | } | |
6960 | else | |
6961 | { | |
6962 | op1 = gen_label_rtx (); | |
6963 | jumpifnot (TREE_OPERAND (exp, 0), op0); | |
5dab5552 | 6964 | |
956d6950 | 6965 | start_cleanup_deferral (); |
bbf6f052 RK |
6966 | if (temp != 0) |
6967 | store_expr (TREE_OPERAND (exp, 1), temp, 0); | |
6968 | else | |
906c4e36 RK |
6969 | expand_expr (TREE_OPERAND (exp, 1), |
6970 | ignore ? const0_rtx : NULL_RTX, VOIDmode, 0); | |
956d6950 | 6971 | end_cleanup_deferral (); |
bbf6f052 RK |
6972 | emit_queue (); |
6973 | emit_jump_insn (gen_jump (op1)); | |
6974 | emit_barrier (); | |
6975 | emit_label (op0); | |
956d6950 | 6976 | start_cleanup_deferral (); |
bbf6f052 RK |
6977 | if (temp != 0) |
6978 | store_expr (TREE_OPERAND (exp, 2), temp, 0); | |
6979 | else | |
906c4e36 RK |
6980 | expand_expr (TREE_OPERAND (exp, 2), |
6981 | ignore ? const0_rtx : NULL_RTX, VOIDmode, 0); | |
bbf6f052 RK |
6982 | } |
6983 | ||
956d6950 | 6984 | end_cleanup_deferral (); |
bbf6f052 RK |
6985 | |
6986 | emit_queue (); | |
6987 | emit_label (op1); | |
6988 | OK_DEFER_POP; | |
5dab5552 | 6989 | |
bbf6f052 RK |
6990 | return temp; |
6991 | } | |
6992 | ||
6993 | case TARGET_EXPR: | |
6994 | { | |
6995 | /* Something needs to be initialized, but we didn't know | |
6996 | where that thing was when building the tree. For example, | |
6997 | it could be the return value of a function, or a parameter | |
6998 | to a function which lays down in the stack, or a temporary | |
6999 | variable which must be passed by reference. | |
7000 | ||
7001 | We guarantee that the expression will either be constructed | |
7002 | or copied into our original target. */ | |
7003 | ||
7004 | tree slot = TREE_OPERAND (exp, 0); | |
2a888d4c | 7005 | tree cleanups = NULL_TREE; |
5c062816 | 7006 | tree exp1; |
bbf6f052 RK |
7007 | |
7008 | if (TREE_CODE (slot) != VAR_DECL) | |
7009 | abort (); | |
7010 | ||
9c51f375 RK |
7011 | if (! ignore) |
7012 | target = original_target; | |
7013 | ||
bbf6f052 RK |
7014 | if (target == 0) |
7015 | { | |
7016 | if (DECL_RTL (slot) != 0) | |
ac993f4f MS |
7017 | { |
7018 | target = DECL_RTL (slot); | |
5c062816 | 7019 | /* If we have already expanded the slot, so don't do |
ac993f4f | 7020 | it again. (mrs) */ |
5c062816 MS |
7021 | if (TREE_OPERAND (exp, 1) == NULL_TREE) |
7022 | return target; | |
ac993f4f | 7023 | } |
bbf6f052 RK |
7024 | else |
7025 | { | |
e9a25f70 | 7026 | target = assign_temp (type, 2, 0, 1); |
bbf6f052 RK |
7027 | /* All temp slots at this level must not conflict. */ |
7028 | preserve_temp_slots (target); | |
7029 | DECL_RTL (slot) = target; | |
e9a25f70 JL |
7030 | if (TREE_ADDRESSABLE (slot)) |
7031 | { | |
7032 | TREE_ADDRESSABLE (slot) = 0; | |
7033 | mark_addressable (slot); | |
7034 | } | |
bbf6f052 | 7035 | |
e287fd6e RK |
7036 | /* Since SLOT is not known to the called function |
7037 | to belong to its stack frame, we must build an explicit | |
7038 | cleanup. This case occurs when we must build up a reference | |
7039 | to pass the reference as an argument. In this case, | |
7040 | it is very likely that such a reference need not be | |
7041 | built here. */ | |
7042 | ||
7043 | if (TREE_OPERAND (exp, 2) == 0) | |
7044 | TREE_OPERAND (exp, 2) = maybe_build_cleanup (slot); | |
2a888d4c | 7045 | cleanups = TREE_OPERAND (exp, 2); |
e287fd6e | 7046 | } |
bbf6f052 RK |
7047 | } |
7048 | else | |
7049 | { | |
7050 | /* This case does occur, when expanding a parameter which | |
7051 | needs to be constructed on the stack. The target | |
7052 | is the actual stack address that we want to initialize. | |
7053 | The function we call will perform the cleanup in this case. */ | |
7054 | ||
8c042b47 RS |
7055 | /* If we have already assigned it space, use that space, |
7056 | not target that we were passed in, as our target | |
7057 | parameter is only a hint. */ | |
7058 | if (DECL_RTL (slot) != 0) | |
7059 | { | |
7060 | target = DECL_RTL (slot); | |
7061 | /* If we have already expanded the slot, so don't do | |
7062 | it again. (mrs) */ | |
7063 | if (TREE_OPERAND (exp, 1) == NULL_TREE) | |
7064 | return target; | |
7065 | } | |
21002281 JW |
7066 | else |
7067 | { | |
7068 | DECL_RTL (slot) = target; | |
7069 | /* If we must have an addressable slot, then make sure that | |
7070 | the RTL that we just stored in slot is OK. */ | |
7071 | if (TREE_ADDRESSABLE (slot)) | |
7072 | { | |
7073 | TREE_ADDRESSABLE (slot) = 0; | |
7074 | mark_addressable (slot); | |
7075 | } | |
7076 | } | |
bbf6f052 RK |
7077 | } |
7078 | ||
4847c938 | 7079 | exp1 = TREE_OPERAND (exp, 3) = TREE_OPERAND (exp, 1); |
5c062816 MS |
7080 | /* Mark it as expanded. */ |
7081 | TREE_OPERAND (exp, 1) = NULL_TREE; | |
7082 | ||
e5e809f4 | 7083 | TREE_USED (slot) = 1; |
41531e5b | 7084 | store_expr (exp1, target, 0); |
61d6b1cc | 7085 | |
e976b8b2 | 7086 | expand_decl_cleanup (NULL_TREE, cleanups); |
61d6b1cc | 7087 | |
41531e5b | 7088 | return target; |
bbf6f052 RK |
7089 | } |
7090 | ||
7091 | case INIT_EXPR: | |
7092 | { | |
7093 | tree lhs = TREE_OPERAND (exp, 0); | |
7094 | tree rhs = TREE_OPERAND (exp, 1); | |
7095 | tree noncopied_parts = 0; | |
7096 | tree lhs_type = TREE_TYPE (lhs); | |
7097 | ||
7098 | temp = expand_assignment (lhs, rhs, ! ignore, original_target != 0); | |
7099 | if (TYPE_NONCOPIED_PARTS (lhs_type) != 0 && !fixed_type_p (rhs)) | |
7100 | noncopied_parts = init_noncopied_parts (stabilize_reference (lhs), | |
7101 | TYPE_NONCOPIED_PARTS (lhs_type)); | |
7102 | while (noncopied_parts != 0) | |
7103 | { | |
7104 | expand_assignment (TREE_VALUE (noncopied_parts), | |
7105 | TREE_PURPOSE (noncopied_parts), 0, 0); | |
7106 | noncopied_parts = TREE_CHAIN (noncopied_parts); | |
7107 | } | |
7108 | return temp; | |
7109 | } | |
7110 | ||
7111 | case MODIFY_EXPR: | |
7112 | { | |
7113 | /* If lhs is complex, expand calls in rhs before computing it. | |
7114 | That's so we don't compute a pointer and save it over a call. | |
7115 | If lhs is simple, compute it first so we can give it as a | |
7116 | target if the rhs is just a call. This avoids an extra temp and copy | |
7117 | and that prevents a partial-subsumption which makes bad code. | |
7118 | Actually we could treat component_ref's of vars like vars. */ | |
7119 | ||
7120 | tree lhs = TREE_OPERAND (exp, 0); | |
7121 | tree rhs = TREE_OPERAND (exp, 1); | |
7122 | tree noncopied_parts = 0; | |
7123 | tree lhs_type = TREE_TYPE (lhs); | |
7124 | ||
7125 | temp = 0; | |
7126 | ||
7127 | if (TREE_CODE (lhs) != VAR_DECL | |
7128 | && TREE_CODE (lhs) != RESULT_DECL | |
b60334e8 RK |
7129 | && TREE_CODE (lhs) != PARM_DECL |
7130 | && ! (TREE_CODE (lhs) == INDIRECT_REF | |
7131 | && TYPE_READONLY (TREE_TYPE (TREE_OPERAND (lhs, 0))))) | |
bbf6f052 RK |
7132 | preexpand_calls (exp); |
7133 | ||
7134 | /* Check for |= or &= of a bitfield of size one into another bitfield | |
7135 | of size 1. In this case, (unless we need the result of the | |
7136 | assignment) we can do this more efficiently with a | |
7137 | test followed by an assignment, if necessary. | |
7138 | ||
7139 | ??? At this point, we can't get a BIT_FIELD_REF here. But if | |
7140 | things change so we do, this code should be enhanced to | |
7141 | support it. */ | |
7142 | if (ignore | |
7143 | && TREE_CODE (lhs) == COMPONENT_REF | |
7144 | && (TREE_CODE (rhs) == BIT_IOR_EXPR | |
7145 | || TREE_CODE (rhs) == BIT_AND_EXPR) | |
7146 | && TREE_OPERAND (rhs, 0) == lhs | |
7147 | && TREE_CODE (TREE_OPERAND (rhs, 1)) == COMPONENT_REF | |
7148 | && TREE_INT_CST_LOW (DECL_SIZE (TREE_OPERAND (lhs, 1))) == 1 | |
7149 | && TREE_INT_CST_LOW (DECL_SIZE (TREE_OPERAND (TREE_OPERAND (rhs, 1), 1))) == 1) | |
7150 | { | |
7151 | rtx label = gen_label_rtx (); | |
7152 | ||
7153 | do_jump (TREE_OPERAND (rhs, 1), | |
7154 | TREE_CODE (rhs) == BIT_IOR_EXPR ? label : 0, | |
7155 | TREE_CODE (rhs) == BIT_AND_EXPR ? label : 0); | |
7156 | expand_assignment (lhs, convert (TREE_TYPE (rhs), | |
7157 | (TREE_CODE (rhs) == BIT_IOR_EXPR | |
7158 | ? integer_one_node | |
7159 | : integer_zero_node)), | |
7160 | 0, 0); | |
e7c33f54 | 7161 | do_pending_stack_adjust (); |
bbf6f052 RK |
7162 | emit_label (label); |
7163 | return const0_rtx; | |
7164 | } | |
7165 | ||
7166 | if (TYPE_NONCOPIED_PARTS (lhs_type) != 0 | |
7167 | && ! (fixed_type_p (lhs) && fixed_type_p (rhs))) | |
7168 | noncopied_parts = save_noncopied_parts (stabilize_reference (lhs), | |
7169 | TYPE_NONCOPIED_PARTS (lhs_type)); | |
7170 | ||
7171 | temp = expand_assignment (lhs, rhs, ! ignore, original_target != 0); | |
7172 | while (noncopied_parts != 0) | |
7173 | { | |
7174 | expand_assignment (TREE_PURPOSE (noncopied_parts), | |
7175 | TREE_VALUE (noncopied_parts), 0, 0); | |
7176 | noncopied_parts = TREE_CHAIN (noncopied_parts); | |
7177 | } | |
7178 | return temp; | |
7179 | } | |
7180 | ||
7181 | case PREINCREMENT_EXPR: | |
7182 | case PREDECREMENT_EXPR: | |
7b8b9722 | 7183 | return expand_increment (exp, 0, ignore); |
bbf6f052 RK |
7184 | |
7185 | case POSTINCREMENT_EXPR: | |
7186 | case POSTDECREMENT_EXPR: | |
7187 | /* Faster to treat as pre-increment if result is not used. */ | |
7b8b9722 | 7188 | return expand_increment (exp, ! ignore, ignore); |
bbf6f052 RK |
7189 | |
7190 | case ADDR_EXPR: | |
987c71d9 | 7191 | /* If nonzero, TEMP will be set to the address of something that might |
0f41302f | 7192 | be a MEM corresponding to a stack slot. */ |
987c71d9 RK |
7193 | temp = 0; |
7194 | ||
bbf6f052 RK |
7195 | /* Are we taking the address of a nested function? */ |
7196 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == FUNCTION_DECL | |
38ee6ed9 | 7197 | && decl_function_context (TREE_OPERAND (exp, 0)) != 0 |
e5e809f4 JL |
7198 | && ! DECL_NO_STATIC_CHAIN (TREE_OPERAND (exp, 0)) |
7199 | && ! TREE_STATIC (exp)) | |
bbf6f052 RK |
7200 | { |
7201 | op0 = trampoline_address (TREE_OPERAND (exp, 0)); | |
7202 | op0 = force_operand (op0, target); | |
7203 | } | |
682ba3a6 RK |
7204 | /* If we are taking the address of something erroneous, just |
7205 | return a zero. */ | |
7206 | else if (TREE_CODE (TREE_OPERAND (exp, 0)) == ERROR_MARK) | |
7207 | return const0_rtx; | |
bbf6f052 RK |
7208 | else |
7209 | { | |
e287fd6e RK |
7210 | /* We make sure to pass const0_rtx down if we came in with |
7211 | ignore set, to avoid doing the cleanups twice for something. */ | |
7212 | op0 = expand_expr (TREE_OPERAND (exp, 0), | |
7213 | ignore ? const0_rtx : NULL_RTX, VOIDmode, | |
bbf6f052 RK |
7214 | (modifier == EXPAND_INITIALIZER |
7215 | ? modifier : EXPAND_CONST_ADDRESS)); | |
896102d0 | 7216 | |
119af78a RK |
7217 | /* If we are going to ignore the result, OP0 will have been set |
7218 | to const0_rtx, so just return it. Don't get confused and | |
7219 | think we are taking the address of the constant. */ | |
7220 | if (ignore) | |
7221 | return op0; | |
7222 | ||
3539e816 MS |
7223 | op0 = protect_from_queue (op0, 0); |
7224 | ||
896102d0 RK |
7225 | /* We would like the object in memory. If it is a constant, |
7226 | we can have it be statically allocated into memory. For | |
682ba3a6 | 7227 | a non-constant (REG, SUBREG or CONCAT), we need to allocate some |
896102d0 RK |
7228 | memory and store the value into it. */ |
7229 | ||
7230 | if (CONSTANT_P (op0)) | |
7231 | op0 = force_const_mem (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))), | |
7232 | op0); | |
987c71d9 | 7233 | else if (GET_CODE (op0) == MEM) |
af5b53ed RK |
7234 | { |
7235 | mark_temp_addr_taken (op0); | |
7236 | temp = XEXP (op0, 0); | |
7237 | } | |
896102d0 | 7238 | |
682ba3a6 RK |
7239 | else if (GET_CODE (op0) == REG || GET_CODE (op0) == SUBREG |
7240 | || GET_CODE (op0) == CONCAT) | |
896102d0 RK |
7241 | { |
7242 | /* If this object is in a register, it must be not | |
0f41302f | 7243 | be BLKmode. */ |
896102d0 | 7244 | tree inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); |
06089a8b | 7245 | rtx memloc = assign_temp (inner_type, 1, 1, 1); |
896102d0 | 7246 | |
7a0b7b9a | 7247 | mark_temp_addr_taken (memloc); |
896102d0 RK |
7248 | emit_move_insn (memloc, op0); |
7249 | op0 = memloc; | |
7250 | } | |
7251 | ||
bbf6f052 RK |
7252 | if (GET_CODE (op0) != MEM) |
7253 | abort (); | |
7254 | ||
7255 | if (modifier == EXPAND_SUM || modifier == EXPAND_INITIALIZER) | |
88f63c77 RK |
7256 | { |
7257 | temp = XEXP (op0, 0); | |
7258 | #ifdef POINTERS_EXTEND_UNSIGNED | |
7259 | if (GET_MODE (temp) == Pmode && GET_MODE (temp) != mode | |
7260 | && mode == ptr_mode) | |
9fcfcce7 | 7261 | temp = convert_memory_address (ptr_mode, temp); |
88f63c77 RK |
7262 | #endif |
7263 | return temp; | |
7264 | } | |
987c71d9 | 7265 | |
bbf6f052 RK |
7266 | op0 = force_operand (XEXP (op0, 0), target); |
7267 | } | |
987c71d9 | 7268 | |
bbf6f052 | 7269 | if (flag_force_addr && GET_CODE (op0) != REG) |
987c71d9 RK |
7270 | op0 = force_reg (Pmode, op0); |
7271 | ||
dc6d66b3 RK |
7272 | if (GET_CODE (op0) == REG |
7273 | && ! REG_USERVAR_P (op0)) | |
7274 | mark_reg_pointer (op0, TYPE_ALIGN (TREE_TYPE (type)) / BITS_PER_UNIT); | |
987c71d9 RK |
7275 | |
7276 | /* If we might have had a temp slot, add an equivalent address | |
7277 | for it. */ | |
7278 | if (temp != 0) | |
7279 | update_temp_slot_address (temp, op0); | |
7280 | ||
88f63c77 RK |
7281 | #ifdef POINTERS_EXTEND_UNSIGNED |
7282 | if (GET_MODE (op0) == Pmode && GET_MODE (op0) != mode | |
7283 | && mode == ptr_mode) | |
9fcfcce7 | 7284 | op0 = convert_memory_address (ptr_mode, op0); |
88f63c77 RK |
7285 | #endif |
7286 | ||
bbf6f052 RK |
7287 | return op0; |
7288 | ||
7289 | case ENTRY_VALUE_EXPR: | |
7290 | abort (); | |
7291 | ||
7308a047 RS |
7292 | /* COMPLEX type for Extended Pascal & Fortran */ |
7293 | case COMPLEX_EXPR: | |
7294 | { | |
7295 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (exp))); | |
6551fa4d | 7296 | rtx insns; |
7308a047 RS |
7297 | |
7298 | /* Get the rtx code of the operands. */ | |
7299 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); | |
7300 | op1 = expand_expr (TREE_OPERAND (exp, 1), 0, VOIDmode, 0); | |
7301 | ||
7302 | if (! target) | |
7303 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); | |
7304 | ||
6551fa4d | 7305 | start_sequence (); |
7308a047 RS |
7306 | |
7307 | /* Move the real (op0) and imaginary (op1) parts to their location. */ | |
2d7050fd RS |
7308 | emit_move_insn (gen_realpart (mode, target), op0); |
7309 | emit_move_insn (gen_imagpart (mode, target), op1); | |
7308a047 | 7310 | |
6551fa4d JW |
7311 | insns = get_insns (); |
7312 | end_sequence (); | |
7313 | ||
7308a047 | 7314 | /* Complex construction should appear as a single unit. */ |
6551fa4d JW |
7315 | /* If TARGET is a CONCAT, we got insns like RD = RS, ID = IS, |
7316 | each with a separate pseudo as destination. | |
7317 | It's not correct for flow to treat them as a unit. */ | |
6d6e61ce | 7318 | if (GET_CODE (target) != CONCAT) |
6551fa4d JW |
7319 | emit_no_conflict_block (insns, target, op0, op1, NULL_RTX); |
7320 | else | |
7321 | emit_insns (insns); | |
7308a047 RS |
7322 | |
7323 | return target; | |
7324 | } | |
7325 | ||
7326 | case REALPART_EXPR: | |
2d7050fd RS |
7327 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); |
7328 | return gen_realpart (mode, op0); | |
7308a047 RS |
7329 | |
7330 | case IMAGPART_EXPR: | |
2d7050fd RS |
7331 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); |
7332 | return gen_imagpart (mode, op0); | |
7308a047 RS |
7333 | |
7334 | case CONJ_EXPR: | |
7335 | { | |
62acb978 | 7336 | enum machine_mode partmode = TYPE_MODE (TREE_TYPE (TREE_TYPE (exp))); |
7308a047 | 7337 | rtx imag_t; |
6551fa4d | 7338 | rtx insns; |
7308a047 RS |
7339 | |
7340 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); | |
7341 | ||
7342 | if (! target) | |
d6a5ac33 | 7343 | target = gen_reg_rtx (mode); |
7308a047 | 7344 | |
6551fa4d | 7345 | start_sequence (); |
7308a047 RS |
7346 | |
7347 | /* Store the realpart and the negated imagpart to target. */ | |
62acb978 RK |
7348 | emit_move_insn (gen_realpart (partmode, target), |
7349 | gen_realpart (partmode, op0)); | |
7308a047 | 7350 | |
62acb978 RK |
7351 | imag_t = gen_imagpart (partmode, target); |
7352 | temp = expand_unop (partmode, neg_optab, | |
7353 | gen_imagpart (partmode, op0), imag_t, 0); | |
7308a047 RS |
7354 | if (temp != imag_t) |
7355 | emit_move_insn (imag_t, temp); | |
7356 | ||
6551fa4d JW |
7357 | insns = get_insns (); |
7358 | end_sequence (); | |
7359 | ||
d6a5ac33 RK |
7360 | /* Conjugate should appear as a single unit |
7361 | If TARGET is a CONCAT, we got insns like RD = RS, ID = - IS, | |
6551fa4d JW |
7362 | each with a separate pseudo as destination. |
7363 | It's not correct for flow to treat them as a unit. */ | |
6d6e61ce | 7364 | if (GET_CODE (target) != CONCAT) |
6551fa4d JW |
7365 | emit_no_conflict_block (insns, target, op0, NULL_RTX, NULL_RTX); |
7366 | else | |
7367 | emit_insns (insns); | |
7308a047 RS |
7368 | |
7369 | return target; | |
7370 | } | |
7371 | ||
e976b8b2 MS |
7372 | case TRY_CATCH_EXPR: |
7373 | { | |
7374 | tree handler = TREE_OPERAND (exp, 1); | |
7375 | ||
7376 | expand_eh_region_start (); | |
7377 | ||
7378 | op0 = expand_expr (TREE_OPERAND (exp, 0), 0, VOIDmode, 0); | |
7379 | ||
7380 | expand_eh_region_end (handler); | |
7381 | ||
7382 | return op0; | |
7383 | } | |
7384 | ||
7385 | case POPDCC_EXPR: | |
7386 | { | |
7387 | rtx dcc = get_dynamic_cleanup_chain (); | |
38a448ca | 7388 | emit_move_insn (dcc, validize_mem (gen_rtx_MEM (Pmode, dcc))); |
e976b8b2 MS |
7389 | return const0_rtx; |
7390 | } | |
7391 | ||
7392 | case POPDHC_EXPR: | |
7393 | { | |
7394 | rtx dhc = get_dynamic_handler_chain (); | |
38a448ca | 7395 | emit_move_insn (dhc, validize_mem (gen_rtx_MEM (Pmode, dhc))); |
e976b8b2 MS |
7396 | return const0_rtx; |
7397 | } | |
7398 | ||
bbf6f052 | 7399 | case ERROR_MARK: |
66538193 RS |
7400 | op0 = CONST0_RTX (tmode); |
7401 | if (op0 != 0) | |
7402 | return op0; | |
bbf6f052 RK |
7403 | return const0_rtx; |
7404 | ||
7405 | default: | |
90764a87 | 7406 | return (*lang_expand_expr) (exp, original_target, tmode, modifier); |
bbf6f052 RK |
7407 | } |
7408 | ||
7409 | /* Here to do an ordinary binary operator, generating an instruction | |
7410 | from the optab already placed in `this_optab'. */ | |
7411 | binop: | |
7412 | preexpand_calls (exp); | |
e5e809f4 | 7413 | if (! safe_from_p (subtarget, TREE_OPERAND (exp, 1), 1)) |
bbf6f052 RK |
7414 | subtarget = 0; |
7415 | op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0); | |
906c4e36 | 7416 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); |
bbf6f052 RK |
7417 | binop2: |
7418 | temp = expand_binop (mode, this_optab, op0, op1, target, | |
7419 | unsignedp, OPTAB_LIB_WIDEN); | |
7420 | if (temp == 0) | |
7421 | abort (); | |
7422 | return temp; | |
7423 | } | |
bbf6f052 | 7424 | |
bbf6f052 | 7425 | |
b93a436e JL |
7426 | \f |
7427 | /* Return the alignment in bits of EXP, a pointer valued expression. | |
7428 | But don't return more than MAX_ALIGN no matter what. | |
7429 | The alignment returned is, by default, the alignment of the thing that | |
7430 | EXP points to (if it is not a POINTER_TYPE, 0 is returned). | |
7431 | ||
7432 | Otherwise, look at the expression to see if we can do better, i.e., if the | |
7433 | expression is actually pointing at an object whose alignment is tighter. */ | |
0f41302f | 7434 | |
b93a436e JL |
7435 | static int |
7436 | get_pointer_alignment (exp, max_align) | |
7437 | tree exp; | |
7438 | unsigned max_align; | |
bbf6f052 | 7439 | { |
b93a436e JL |
7440 | unsigned align, inner; |
7441 | ||
7442 | if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE) | |
7443 | return 0; | |
7444 | ||
7445 | align = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp))); | |
7446 | align = MIN (align, max_align); | |
7447 | ||
7448 | while (1) | |
bbf6f052 | 7449 | { |
b93a436e | 7450 | switch (TREE_CODE (exp)) |
bbf6f052 | 7451 | { |
b93a436e JL |
7452 | case NOP_EXPR: |
7453 | case CONVERT_EXPR: | |
7454 | case NON_LVALUE_EXPR: | |
7455 | exp = TREE_OPERAND (exp, 0); | |
7456 | if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE) | |
7457 | return align; | |
7458 | inner = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp))); | |
7459 | align = MIN (inner, max_align); | |
7460 | break; | |
7461 | ||
7462 | case PLUS_EXPR: | |
7463 | /* If sum of pointer + int, restrict our maximum alignment to that | |
7464 | imposed by the integer. If not, we can't do any better than | |
7465 | ALIGN. */ | |
7466 | if (TREE_CODE (TREE_OPERAND (exp, 1)) != INTEGER_CST) | |
7467 | return align; | |
7468 | ||
7469 | while (((TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)) * BITS_PER_UNIT) | |
7470 | & (max_align - 1)) | |
7471 | != 0) | |
7472 | max_align >>= 1; | |
7473 | ||
7474 | exp = TREE_OPERAND (exp, 0); | |
7475 | break; | |
7476 | ||
7477 | case ADDR_EXPR: | |
7478 | /* See what we are pointing at and look at its alignment. */ | |
7479 | exp = TREE_OPERAND (exp, 0); | |
7480 | if (TREE_CODE (exp) == FUNCTION_DECL) | |
7481 | align = FUNCTION_BOUNDARY; | |
7482 | else if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd') | |
7483 | align = DECL_ALIGN (exp); | |
7484 | #ifdef CONSTANT_ALIGNMENT | |
7485 | else if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'c') | |
7486 | align = CONSTANT_ALIGNMENT (exp, align); | |
c02bd5d9 | 7487 | #endif |
b93a436e | 7488 | return MIN (align, max_align); |
c02bd5d9 | 7489 | |
b93a436e JL |
7490 | default: |
7491 | return align; | |
7492 | } | |
7493 | } | |
7494 | } | |
7495 | \f | |
7496 | /* Return the tree node and offset if a given argument corresponds to | |
7497 | a string constant. */ | |
7498 | ||
7499 | static tree | |
7500 | string_constant (arg, ptr_offset) | |
7501 | tree arg; | |
7502 | tree *ptr_offset; | |
7503 | { | |
7504 | STRIP_NOPS (arg); | |
7505 | ||
7506 | if (TREE_CODE (arg) == ADDR_EXPR | |
7507 | && TREE_CODE (TREE_OPERAND (arg, 0)) == STRING_CST) | |
7508 | { | |
7509 | *ptr_offset = integer_zero_node; | |
7510 | return TREE_OPERAND (arg, 0); | |
7511 | } | |
7512 | else if (TREE_CODE (arg) == PLUS_EXPR) | |
7513 | { | |
7514 | tree arg0 = TREE_OPERAND (arg, 0); | |
7515 | tree arg1 = TREE_OPERAND (arg, 1); | |
7516 | ||
7517 | STRIP_NOPS (arg0); | |
7518 | STRIP_NOPS (arg1); | |
7519 | ||
7520 | if (TREE_CODE (arg0) == ADDR_EXPR | |
7521 | && TREE_CODE (TREE_OPERAND (arg0, 0)) == STRING_CST) | |
bbf6f052 | 7522 | { |
b93a436e JL |
7523 | *ptr_offset = arg1; |
7524 | return TREE_OPERAND (arg0, 0); | |
bbf6f052 | 7525 | } |
b93a436e JL |
7526 | else if (TREE_CODE (arg1) == ADDR_EXPR |
7527 | && TREE_CODE (TREE_OPERAND (arg1, 0)) == STRING_CST) | |
bbf6f052 | 7528 | { |
b93a436e JL |
7529 | *ptr_offset = arg0; |
7530 | return TREE_OPERAND (arg1, 0); | |
bbf6f052 | 7531 | } |
b93a436e | 7532 | } |
ca695ac9 | 7533 | |
b93a436e JL |
7534 | return 0; |
7535 | } | |
ca695ac9 | 7536 | |
b93a436e JL |
7537 | /* Compute the length of a C string. TREE_STRING_LENGTH is not the right |
7538 | way, because it could contain a zero byte in the middle. | |
7539 | TREE_STRING_LENGTH is the size of the character array, not the string. | |
ca695ac9 | 7540 | |
b93a436e JL |
7541 | Unfortunately, string_constant can't access the values of const char |
7542 | arrays with initializers, so neither can we do so here. */ | |
e87b4f3f | 7543 | |
b93a436e JL |
7544 | static tree |
7545 | c_strlen (src) | |
7546 | tree src; | |
7547 | { | |
7548 | tree offset_node; | |
7549 | int offset, max; | |
7550 | char *ptr; | |
e7c33f54 | 7551 | |
b93a436e JL |
7552 | src = string_constant (src, &offset_node); |
7553 | if (src == 0) | |
7554 | return 0; | |
7555 | max = TREE_STRING_LENGTH (src); | |
7556 | ptr = TREE_STRING_POINTER (src); | |
7557 | if (offset_node && TREE_CODE (offset_node) != INTEGER_CST) | |
7558 | { | |
7559 | /* If the string has an internal zero byte (e.g., "foo\0bar"), we can't | |
7560 | compute the offset to the following null if we don't know where to | |
7561 | start searching for it. */ | |
7562 | int i; | |
7563 | for (i = 0; i < max; i++) | |
7564 | if (ptr[i] == 0) | |
7565 | return 0; | |
7566 | /* We don't know the starting offset, but we do know that the string | |
7567 | has no internal zero bytes. We can assume that the offset falls | |
7568 | within the bounds of the string; otherwise, the programmer deserves | |
7569 | what he gets. Subtract the offset from the length of the string, | |
7570 | and return that. */ | |
7571 | /* This would perhaps not be valid if we were dealing with named | |
7572 | arrays in addition to literal string constants. */ | |
7573 | return size_binop (MINUS_EXPR, size_int (max), offset_node); | |
7574 | } | |
e7c33f54 | 7575 | |
b93a436e JL |
7576 | /* We have a known offset into the string. Start searching there for |
7577 | a null character. */ | |
7578 | if (offset_node == 0) | |
7579 | offset = 0; | |
7580 | else | |
7581 | { | |
7582 | /* Did we get a long long offset? If so, punt. */ | |
7583 | if (TREE_INT_CST_HIGH (offset_node) != 0) | |
7584 | return 0; | |
7585 | offset = TREE_INT_CST_LOW (offset_node); | |
7586 | } | |
7587 | /* If the offset is known to be out of bounds, warn, and call strlen at | |
7588 | runtime. */ | |
7589 | if (offset < 0 || offset > max) | |
7590 | { | |
7591 | warning ("offset outside bounds of constant string"); | |
7592 | return 0; | |
7593 | } | |
7594 | /* Use strlen to search for the first zero byte. Since any strings | |
7595 | constructed with build_string will have nulls appended, we win even | |
7596 | if we get handed something like (char[4])"abcd". | |
e7c33f54 | 7597 | |
b93a436e JL |
7598 | Since OFFSET is our starting index into the string, no further |
7599 | calculation is needed. */ | |
7600 | return size_int (strlen (ptr + offset)); | |
7601 | } | |
1bbddf11 | 7602 | |
b93a436e JL |
7603 | rtx |
7604 | expand_builtin_return_addr (fndecl_code, count, tem) | |
7605 | enum built_in_function fndecl_code; | |
7606 | int count; | |
7607 | rtx tem; | |
7608 | { | |
7609 | int i; | |
e7c33f54 | 7610 | |
b93a436e JL |
7611 | /* Some machines need special handling before we can access |
7612 | arbitrary frames. For example, on the sparc, we must first flush | |
7613 | all register windows to the stack. */ | |
7614 | #ifdef SETUP_FRAME_ADDRESSES | |
7615 | if (count > 0) | |
7616 | SETUP_FRAME_ADDRESSES (); | |
7617 | #endif | |
e87b4f3f | 7618 | |
b93a436e JL |
7619 | /* On the sparc, the return address is not in the frame, it is in a |
7620 | register. There is no way to access it off of the current frame | |
7621 | pointer, but it can be accessed off the previous frame pointer by | |
7622 | reading the value from the register window save area. */ | |
7623 | #ifdef RETURN_ADDR_IN_PREVIOUS_FRAME | |
7624 | if (fndecl_code == BUILT_IN_RETURN_ADDRESS) | |
7625 | count--; | |
7626 | #endif | |
60bac6ea | 7627 | |
b93a436e JL |
7628 | /* Scan back COUNT frames to the specified frame. */ |
7629 | for (i = 0; i < count; i++) | |
7630 | { | |
7631 | /* Assume the dynamic chain pointer is in the word that the | |
7632 | frame address points to, unless otherwise specified. */ | |
7633 | #ifdef DYNAMIC_CHAIN_ADDRESS | |
7634 | tem = DYNAMIC_CHAIN_ADDRESS (tem); | |
7635 | #endif | |
7636 | tem = memory_address (Pmode, tem); | |
7637 | tem = copy_to_reg (gen_rtx_MEM (Pmode, tem)); | |
7638 | } | |
ca695ac9 | 7639 | |
b93a436e JL |
7640 | /* For __builtin_frame_address, return what we've got. */ |
7641 | if (fndecl_code == BUILT_IN_FRAME_ADDRESS) | |
7642 | return tem; | |
e9a25f70 | 7643 | |
b93a436e JL |
7644 | /* For __builtin_return_address, Get the return address from that |
7645 | frame. */ | |
7646 | #ifdef RETURN_ADDR_RTX | |
7647 | tem = RETURN_ADDR_RTX (count, tem); | |
7648 | #else | |
7649 | tem = memory_address (Pmode, | |
7650 | plus_constant (tem, GET_MODE_SIZE (Pmode))); | |
7651 | tem = gen_rtx_MEM (Pmode, tem); | |
7652 | #endif | |
7653 | return tem; | |
7654 | } | |
e9a25f70 | 7655 | |
b93a436e JL |
7656 | /* __builtin_setjmp is passed a pointer to an array of five words (not |
7657 | all will be used on all machines). It operates similarly to the C | |
7658 | library function of the same name, but is more efficient. Much of | |
7659 | the code below (and for longjmp) is copied from the handling of | |
7660 | non-local gotos. | |
ca695ac9 | 7661 | |
b93a436e JL |
7662 | NOTE: This is intended for use by GNAT and the exception handling |
7663 | scheme in the compiler and will only work in the method used by | |
7664 | them. */ | |
e9a25f70 | 7665 | |
b93a436e | 7666 | rtx |
6fd1c67b | 7667 | expand_builtin_setjmp (buf_addr, target, first_label, next_label) |
b93a436e JL |
7668 | rtx buf_addr; |
7669 | rtx target; | |
6fd1c67b | 7670 | rtx first_label, next_label; |
b93a436e | 7671 | { |
6fd1c67b | 7672 | rtx lab1 = gen_label_rtx (); |
b93a436e JL |
7673 | enum machine_mode sa_mode = Pmode, value_mode; |
7674 | rtx stack_save; | |
e9a25f70 | 7675 | |
b93a436e | 7676 | value_mode = TYPE_MODE (integer_type_node); |
ca695ac9 | 7677 | |
b93a436e JL |
7678 | #ifdef POINTERS_EXTEND_UNSIGNED |
7679 | buf_addr = convert_memory_address (Pmode, buf_addr); | |
7680 | #endif | |
d7f21d63 | 7681 | |
b93a436e | 7682 | buf_addr = force_reg (Pmode, buf_addr); |
d7f21d63 | 7683 | |
b93a436e JL |
7684 | if (target == 0 || GET_CODE (target) != REG |
7685 | || REGNO (target) < FIRST_PSEUDO_REGISTER) | |
7686 | target = gen_reg_rtx (value_mode); | |
d7f21d63 | 7687 | |
b93a436e | 7688 | emit_queue (); |
d7f21d63 | 7689 | |
b93a436e JL |
7690 | /* We store the frame pointer and the address of lab1 in the buffer |
7691 | and use the rest of it for the stack save area, which is | |
7692 | machine-dependent. */ | |
7693 | emit_move_insn (gen_rtx_MEM (Pmode, buf_addr), | |
7694 | virtual_stack_vars_rtx); | |
6fd1c67b RH |
7695 | emit_move_insn (validize_mem |
7696 | (gen_rtx_MEM (Pmode, | |
b93a436e JL |
7697 | plus_constant (buf_addr, |
7698 | GET_MODE_SIZE (Pmode)))), | |
6fd1c67b | 7699 | gen_rtx_LABEL_REF (Pmode, lab1)); |
d7f21d63 | 7700 | |
b93a436e JL |
7701 | #ifdef HAVE_save_stack_nonlocal |
7702 | if (HAVE_save_stack_nonlocal) | |
7703 | sa_mode = insn_operand_mode[(int) CODE_FOR_save_stack_nonlocal][0]; | |
7704 | #endif | |
6c174fc0 | 7705 | |
b93a436e JL |
7706 | stack_save = gen_rtx_MEM (sa_mode, |
7707 | plus_constant (buf_addr, | |
7708 | 2 * GET_MODE_SIZE (Pmode))); | |
7709 | emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX); | |
e9a25f70 | 7710 | |
6fd1c67b RH |
7711 | /* If there is further processing to do, do it. */ |
7712 | #ifdef HAVE_builtin_setjmp_setup | |
7713 | if (HAVE_builtin_setjmp_setup) | |
7714 | emit_insn (gen_builtin_setjmp_setup (buf_addr)); | |
b93a436e | 7715 | #endif |
d7f21d63 | 7716 | |
6fd1c67b | 7717 | /* Set TARGET to zero and branch to the first-time-through label. */ |
b93a436e | 7718 | emit_move_insn (target, const0_rtx); |
6fd1c67b | 7719 | emit_jump_insn (gen_jump (first_label)); |
b93a436e JL |
7720 | emit_barrier (); |
7721 | emit_label (lab1); | |
d7f21d63 | 7722 | |
6fd1c67b RH |
7723 | /* Tell flow about the strange goings on. */ |
7724 | current_function_has_nonlocal_label = 1; | |
7725 | ||
7726 | /* Clobber the FP when we get here, so we have to make sure it's | |
7727 | marked as used by this function. */ | |
b93a436e | 7728 | emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx)); |
e9a25f70 | 7729 | |
b93a436e JL |
7730 | /* Mark the static chain as clobbered here so life information |
7731 | doesn't get messed up for it. */ | |
7732 | emit_insn (gen_rtx_CLOBBER (VOIDmode, static_chain_rtx)); | |
d7f21d63 | 7733 | |
b93a436e JL |
7734 | /* Now put in the code to restore the frame pointer, and argument |
7735 | pointer, if needed. The code below is from expand_end_bindings | |
7736 | in stmt.c; see detailed documentation there. */ | |
7737 | #ifdef HAVE_nonlocal_goto | |
7738 | if (! HAVE_nonlocal_goto) | |
7739 | #endif | |
7740 | emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx); | |
ca695ac9 | 7741 | |
b93a436e JL |
7742 | #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM |
7743 | if (fixed_regs[ARG_POINTER_REGNUM]) | |
7744 | { | |
7745 | #ifdef ELIMINABLE_REGS | |
081f5e7e | 7746 | int i; |
b93a436e | 7747 | static struct elims {int from, to;} elim_regs[] = ELIMINABLE_REGS; |
ca695ac9 | 7748 | |
b93a436e JL |
7749 | for (i = 0; i < sizeof elim_regs / sizeof elim_regs[0]; i++) |
7750 | if (elim_regs[i].from == ARG_POINTER_REGNUM | |
7751 | && elim_regs[i].to == HARD_FRAME_POINTER_REGNUM) | |
7752 | break; | |
ca695ac9 | 7753 | |
b93a436e JL |
7754 | if (i == sizeof elim_regs / sizeof elim_regs [0]) |
7755 | #endif | |
7756 | { | |
7757 | /* Now restore our arg pointer from the address at which it | |
7758 | was saved in our stack frame. | |
7759 | If there hasn't be space allocated for it yet, make | |
7760 | some now. */ | |
7761 | if (arg_pointer_save_area == 0) | |
7762 | arg_pointer_save_area | |
7763 | = assign_stack_local (Pmode, GET_MODE_SIZE (Pmode), 0); | |
7764 | emit_move_insn (virtual_incoming_args_rtx, | |
7765 | copy_to_reg (arg_pointer_save_area)); | |
7766 | } | |
7767 | } | |
7768 | #endif | |
ca695ac9 | 7769 | |
6fd1c67b RH |
7770 | #ifdef HAVE_builtin_setjmp_receiver |
7771 | if (HAVE_builtin_setjmp_receiver) | |
7772 | emit_insn (gen_builtin_setjmp_receiver (lab1)); | |
7773 | else | |
7774 | #endif | |
b93a436e | 7775 | #ifdef HAVE_nonlocal_goto_receiver |
6fd1c67b RH |
7776 | if (HAVE_nonlocal_goto_receiver) |
7777 | emit_insn (gen_nonlocal_goto_receiver ()); | |
7778 | else | |
b93a436e | 7779 | #endif |
081f5e7e KG |
7780 | { |
7781 | ; /* Nothing */ | |
7782 | } | |
6fd1c67b RH |
7783 | |
7784 | /* Set TARGET, and branch to the next-time-through label. */ | |
7785 | emit_move_insn (target, gen_lowpart (GET_MODE (target), static_chain_rtx)); | |
7786 | emit_jump_insn (gen_jump (next_label)); | |
7787 | emit_barrier (); | |
ca695ac9 | 7788 | |
6fd1c67b RH |
7789 | return target; |
7790 | } | |
ca695ac9 | 7791 | |
6fd1c67b RH |
7792 | void |
7793 | expand_builtin_longjmp (buf_addr, value) | |
7794 | rtx buf_addr, value; | |
7795 | { | |
7796 | rtx fp, lab, stack; | |
7797 | enum machine_mode sa_mode; | |
ca695ac9 | 7798 | |
6fd1c67b RH |
7799 | #ifdef POINTERS_EXTEND_UNSIGNED |
7800 | buf_addr = convert_memory_address (Pmode, buf_addr); | |
b93a436e | 7801 | #endif |
6fd1c67b RH |
7802 | buf_addr = force_reg (Pmode, buf_addr); |
7803 | ||
7804 | /* The value sent by longjmp is not allowed to be zero. Force it | |
7805 | to one if so. */ | |
7806 | if (GET_CODE (value) == CONST_INT) | |
7807 | { | |
7808 | if (INTVAL (value) == 0) | |
7809 | value = const1_rtx; | |
7810 | } | |
7811 | else | |
7812 | { | |
7813 | lab = gen_label_rtx (); | |
7814 | ||
7815 | emit_cmp_insn (value, const0_rtx, NE, NULL_RTX, GET_MODE (value), 0, 0); | |
7816 | emit_jump_insn (gen_bne (lab)); | |
7817 | emit_move_insn (value, const1_rtx); | |
7818 | emit_label (lab); | |
7819 | } | |
7820 | ||
7821 | /* Make sure the value is in the right mode to be copied to the chain. */ | |
7822 | if (GET_MODE (value) != VOIDmode) | |
7823 | value = gen_lowpart (GET_MODE (static_chain_rtx), value); | |
7824 | ||
7825 | #ifdef HAVE_builtin_longjmp | |
7826 | if (HAVE_builtin_longjmp) | |
7827 | { | |
7828 | /* Copy the "return value" to the static chain reg. */ | |
7829 | emit_move_insn (static_chain_rtx, value); | |
7830 | emit_insn (gen_rtx_USE (VOIDmode, static_chain_rtx)); | |
7831 | emit_insn (gen_builtin_longjmp (buf_addr)); | |
7832 | } | |
7833 | else | |
b93a436e | 7834 | #endif |
6fd1c67b RH |
7835 | { |
7836 | fp = gen_rtx_MEM (Pmode, buf_addr); | |
7837 | lab = gen_rtx_MEM (Pmode, plus_constant (buf_addr, | |
7838 | GET_MODE_SIZE (Pmode))); | |
e9a25f70 | 7839 | |
6fd1c67b RH |
7840 | #ifdef HAVE_save_stack_nonlocal |
7841 | sa_mode = (HAVE_save_stack_nonlocal | |
7842 | ? insn_operand_mode[(int) CODE_FOR_save_stack_nonlocal][0] | |
7843 | : Pmode); | |
7844 | #else | |
7845 | sa_mode = Pmode; | |
b93a436e | 7846 | #endif |
ca695ac9 | 7847 | |
6fd1c67b RH |
7848 | stack = gen_rtx_MEM (sa_mode, plus_constant (buf_addr, |
7849 | 2 * GET_MODE_SIZE (Pmode))); | |
7850 | ||
7851 | /* Pick up FP, label, and SP from the block and jump. This code is | |
7852 | from expand_goto in stmt.c; see there for detailed comments. */ | |
7853 | #if HAVE_nonlocal_goto | |
7854 | if (HAVE_nonlocal_goto) | |
7855 | emit_insn (gen_nonlocal_goto (value, fp, stack, lab)); | |
7856 | else | |
b93a436e | 7857 | #endif |
6fd1c67b RH |
7858 | { |
7859 | lab = copy_to_reg (lab); | |
60bac6ea | 7860 | |
6fd1c67b RH |
7861 | /* Copy the "return value" to the static chain reg. */ |
7862 | emit_move_insn (static_chain_rtx, value); | |
7863 | ||
7864 | emit_move_insn (hard_frame_pointer_rtx, fp); | |
7865 | emit_stack_restore (SAVE_NONLOCAL, stack, NULL_RTX); | |
7866 | ||
7867 | emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx)); | |
7868 | emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx)); | |
7869 | emit_insn (gen_rtx_USE (VOIDmode, static_chain_rtx)); | |
7870 | emit_indirect_jump (lab); | |
7871 | } | |
7872 | } | |
b93a436e | 7873 | } |
60bac6ea | 7874 | |
b93a436e JL |
7875 | \f |
7876 | /* Expand an expression EXP that calls a built-in function, | |
7877 | with result going to TARGET if that's convenient | |
7878 | (and in mode MODE if that's convenient). | |
7879 | SUBTARGET may be used as the target for computing one of EXP's operands. | |
7880 | IGNORE is nonzero if the value is to be ignored. */ | |
60bac6ea | 7881 | |
b93a436e JL |
7882 | #define CALLED_AS_BUILT_IN(NODE) \ |
7883 | (!strncmp (IDENTIFIER_POINTER (DECL_NAME (NODE)), "__builtin_", 10)) | |
60bac6ea | 7884 | |
b93a436e JL |
7885 | static rtx |
7886 | expand_builtin (exp, target, subtarget, mode, ignore) | |
7887 | tree exp; | |
7888 | rtx target; | |
7889 | rtx subtarget; | |
7890 | enum machine_mode mode; | |
7891 | int ignore; | |
7892 | { | |
7893 | tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
7894 | tree arglist = TREE_OPERAND (exp, 1); | |
7895 | rtx op0; | |
7896 | rtx lab1, insns; | |
7897 | enum machine_mode value_mode = TYPE_MODE (TREE_TYPE (exp)); | |
7898 | optab builtin_optab; | |
60bac6ea | 7899 | |
b93a436e JL |
7900 | switch (DECL_FUNCTION_CODE (fndecl)) |
7901 | { | |
7902 | case BUILT_IN_ABS: | |
7903 | case BUILT_IN_LABS: | |
7904 | case BUILT_IN_FABS: | |
7905 | /* build_function_call changes these into ABS_EXPR. */ | |
7906 | abort (); | |
4ed67205 | 7907 | |
b93a436e JL |
7908 | case BUILT_IN_SIN: |
7909 | case BUILT_IN_COS: | |
7910 | /* Treat these like sqrt, but only if the user asks for them. */ | |
7911 | if (! flag_fast_math) | |
7912 | break; | |
7913 | case BUILT_IN_FSQRT: | |
7914 | /* If not optimizing, call the library function. */ | |
7915 | if (! optimize) | |
7916 | break; | |
4ed67205 | 7917 | |
b93a436e JL |
7918 | if (arglist == 0 |
7919 | /* Arg could be wrong type if user redeclared this fcn wrong. */ | |
7920 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != REAL_TYPE) | |
4ed67205 RK |
7921 | break; |
7922 | ||
b93a436e JL |
7923 | /* Stabilize and compute the argument. */ |
7924 | if (TREE_CODE (TREE_VALUE (arglist)) != VAR_DECL | |
7925 | && TREE_CODE (TREE_VALUE (arglist)) != PARM_DECL) | |
7926 | { | |
7927 | exp = copy_node (exp); | |
7928 | arglist = copy_node (arglist); | |
7929 | TREE_OPERAND (exp, 1) = arglist; | |
7930 | TREE_VALUE (arglist) = save_expr (TREE_VALUE (arglist)); | |
7931 | } | |
7932 | op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0); | |
b089937a | 7933 | |
b93a436e JL |
7934 | /* Make a suitable register to place result in. */ |
7935 | target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp))); | |
7565a035 | 7936 | |
b93a436e JL |
7937 | emit_queue (); |
7938 | start_sequence (); | |
7565a035 | 7939 | |
b93a436e JL |
7940 | switch (DECL_FUNCTION_CODE (fndecl)) |
7941 | { | |
7942 | case BUILT_IN_SIN: | |
7943 | builtin_optab = sin_optab; break; | |
7944 | case BUILT_IN_COS: | |
7945 | builtin_optab = cos_optab; break; | |
7946 | case BUILT_IN_FSQRT: | |
7947 | builtin_optab = sqrt_optab; break; | |
7948 | default: | |
7949 | abort (); | |
7950 | } | |
4ed67205 | 7951 | |
b93a436e JL |
7952 | /* Compute into TARGET. |
7953 | Set TARGET to wherever the result comes back. */ | |
7954 | target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))), | |
7955 | builtin_optab, op0, target, 0); | |
7956 | ||
7957 | /* If we were unable to expand via the builtin, stop the | |
7958 | sequence (without outputting the insns) and break, causing | |
38e01259 | 7959 | a call to the library function. */ |
b93a436e | 7960 | if (target == 0) |
4ed67205 | 7961 | { |
b93a436e JL |
7962 | end_sequence (); |
7963 | break; | |
7964 | } | |
4ed67205 | 7965 | |
b93a436e JL |
7966 | /* Check the results by default. But if flag_fast_math is turned on, |
7967 | then assume sqrt will always be called with valid arguments. */ | |
4ed67205 | 7968 | |
b93a436e JL |
7969 | if (! flag_fast_math) |
7970 | { | |
7971 | /* Don't define the builtin FP instructions | |
7972 | if your machine is not IEEE. */ | |
7973 | if (TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT) | |
7974 | abort (); | |
4ed67205 | 7975 | |
b93a436e | 7976 | lab1 = gen_label_rtx (); |
ca55abae | 7977 | |
b93a436e JL |
7978 | /* Test the result; if it is NaN, set errno=EDOM because |
7979 | the argument was not in the domain. */ | |
7980 | emit_cmp_insn (target, target, EQ, 0, GET_MODE (target), 0, 0); | |
7981 | emit_jump_insn (gen_beq (lab1)); | |
7982 | ||
7983 | #ifdef TARGET_EDOM | |
7984 | { | |
7985 | #ifdef GEN_ERRNO_RTX | |
7986 | rtx errno_rtx = GEN_ERRNO_RTX; | |
7987 | #else | |
7988 | rtx errno_rtx | |
7989 | = gen_rtx_MEM (word_mode, gen_rtx_SYMBOL_REF (Pmode, "errno")); | |
7990 | #endif | |
e87b4f3f | 7991 | |
b93a436e JL |
7992 | emit_move_insn (errno_rtx, GEN_INT (TARGET_EDOM)); |
7993 | } | |
7994 | #else | |
7995 | /* We can't set errno=EDOM directly; let the library call do it. | |
7996 | Pop the arguments right away in case the call gets deleted. */ | |
7997 | NO_DEFER_POP; | |
7998 | expand_call (exp, target, 0); | |
7999 | OK_DEFER_POP; | |
8000 | #endif | |
e7c33f54 | 8001 | |
b93a436e JL |
8002 | emit_label (lab1); |
8003 | } | |
0006469d | 8004 | |
b93a436e JL |
8005 | /* Output the entire sequence. */ |
8006 | insns = get_insns (); | |
8007 | end_sequence (); | |
8008 | emit_insns (insns); | |
8009 | ||
8010 | return target; | |
0006469d | 8011 | |
b93a436e JL |
8012 | case BUILT_IN_FMOD: |
8013 | break; | |
0006469d | 8014 | |
b93a436e JL |
8015 | /* __builtin_apply_args returns block of memory allocated on |
8016 | the stack into which is stored the arg pointer, structure | |
8017 | value address, static chain, and all the registers that might | |
8018 | possibly be used in performing a function call. The code is | |
8019 | moved to the start of the function so the incoming values are | |
8020 | saved. */ | |
8021 | case BUILT_IN_APPLY_ARGS: | |
8022 | /* Don't do __builtin_apply_args more than once in a function. | |
8023 | Save the result of the first call and reuse it. */ | |
8024 | if (apply_args_value != 0) | |
8025 | return apply_args_value; | |
8026 | { | |
8027 | /* When this function is called, it means that registers must be | |
8028 | saved on entry to this function. So we migrate the | |
8029 | call to the first insn of this function. */ | |
8030 | rtx temp; | |
8031 | rtx seq; | |
0006469d | 8032 | |
b93a436e JL |
8033 | start_sequence (); |
8034 | temp = expand_builtin_apply_args (); | |
8035 | seq = get_insns (); | |
8036 | end_sequence (); | |
0006469d | 8037 | |
b93a436e | 8038 | apply_args_value = temp; |
0006469d | 8039 | |
b93a436e JL |
8040 | /* Put the sequence after the NOTE that starts the function. |
8041 | If this is inside a SEQUENCE, make the outer-level insn | |
8042 | chain current, so the code is placed at the start of the | |
8043 | function. */ | |
8044 | push_topmost_sequence (); | |
8045 | emit_insns_before (seq, NEXT_INSN (get_insns ())); | |
8046 | pop_topmost_sequence (); | |
8047 | return temp; | |
8048 | } | |
0006469d | 8049 | |
b93a436e JL |
8050 | /* __builtin_apply (FUNCTION, ARGUMENTS, ARGSIZE) invokes |
8051 | FUNCTION with a copy of the parameters described by | |
8052 | ARGUMENTS, and ARGSIZE. It returns a block of memory | |
8053 | allocated on the stack into which is stored all the registers | |
8054 | that might possibly be used for returning the result of a | |
8055 | function. ARGUMENTS is the value returned by | |
8056 | __builtin_apply_args. ARGSIZE is the number of bytes of | |
8057 | arguments that must be copied. ??? How should this value be | |
8058 | computed? We'll also need a safe worst case value for varargs | |
8059 | functions. */ | |
8060 | case BUILT_IN_APPLY: | |
8061 | if (arglist == 0 | |
8062 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
e5e809f4 | 8063 | || ! POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (arglist))) |
b93a436e JL |
8064 | || TREE_CHAIN (arglist) == 0 |
8065 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE | |
8066 | || TREE_CHAIN (TREE_CHAIN (arglist)) == 0 | |
8067 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))))) != INTEGER_TYPE) | |
8068 | return const0_rtx; | |
8069 | else | |
8070 | { | |
8071 | int i; | |
8072 | tree t; | |
8073 | rtx ops[3]; | |
0006469d | 8074 | |
b93a436e JL |
8075 | for (t = arglist, i = 0; t; t = TREE_CHAIN (t), i++) |
8076 | ops[i] = expand_expr (TREE_VALUE (t), NULL_RTX, VOIDmode, 0); | |
bbf6f052 | 8077 | |
b93a436e JL |
8078 | return expand_builtin_apply (ops[0], ops[1], ops[2]); |
8079 | } | |
bbf6f052 | 8080 | |
b93a436e JL |
8081 | /* __builtin_return (RESULT) causes the function to return the |
8082 | value described by RESULT. RESULT is address of the block of | |
8083 | memory returned by __builtin_apply. */ | |
8084 | case BUILT_IN_RETURN: | |
8085 | if (arglist | |
8086 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
8087 | && TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) == POINTER_TYPE) | |
8088 | expand_builtin_return (expand_expr (TREE_VALUE (arglist), | |
8089 | NULL_RTX, VOIDmode, 0)); | |
8090 | return const0_rtx; | |
ca695ac9 | 8091 | |
b93a436e JL |
8092 | case BUILT_IN_SAVEREGS: |
8093 | /* Don't do __builtin_saveregs more than once in a function. | |
8094 | Save the result of the first call and reuse it. */ | |
8095 | if (saveregs_value != 0) | |
8096 | return saveregs_value; | |
8097 | { | |
8098 | /* When this function is called, it means that registers must be | |
8099 | saved on entry to this function. So we migrate the | |
8100 | call to the first insn of this function. */ | |
8101 | rtx temp; | |
8102 | rtx seq; | |
ca695ac9 | 8103 | |
b93a436e JL |
8104 | /* Now really call the function. `expand_call' does not call |
8105 | expand_builtin, so there is no danger of infinite recursion here. */ | |
8106 | start_sequence (); | |
ca695ac9 | 8107 | |
b93a436e JL |
8108 | #ifdef EXPAND_BUILTIN_SAVEREGS |
8109 | /* Do whatever the machine needs done in this case. */ | |
8110 | temp = EXPAND_BUILTIN_SAVEREGS (arglist); | |
8111 | #else | |
8112 | /* The register where the function returns its value | |
8113 | is likely to have something else in it, such as an argument. | |
8114 | So preserve that register around the call. */ | |
ca695ac9 | 8115 | |
b93a436e JL |
8116 | if (value_mode != VOIDmode) |
8117 | { | |
8118 | rtx valreg = hard_libcall_value (value_mode); | |
8119 | rtx saved_valreg = gen_reg_rtx (value_mode); | |
ca695ac9 | 8120 | |
b93a436e JL |
8121 | emit_move_insn (saved_valreg, valreg); |
8122 | temp = expand_call (exp, target, ignore); | |
8123 | emit_move_insn (valreg, saved_valreg); | |
ca695ac9 JB |
8124 | } |
8125 | else | |
b93a436e JL |
8126 | /* Generate the call, putting the value in a pseudo. */ |
8127 | temp = expand_call (exp, target, ignore); | |
8128 | #endif | |
bbf6f052 | 8129 | |
b93a436e JL |
8130 | seq = get_insns (); |
8131 | end_sequence (); | |
bbf6f052 | 8132 | |
b93a436e | 8133 | saveregs_value = temp; |
bbf6f052 | 8134 | |
b93a436e JL |
8135 | /* Put the sequence after the NOTE that starts the function. |
8136 | If this is inside a SEQUENCE, make the outer-level insn | |
8137 | chain current, so the code is placed at the start of the | |
8138 | function. */ | |
8139 | push_topmost_sequence (); | |
8140 | emit_insns_before (seq, NEXT_INSN (get_insns ())); | |
8141 | pop_topmost_sequence (); | |
8142 | return temp; | |
8143 | } | |
bbf6f052 | 8144 | |
b93a436e JL |
8145 | /* __builtin_args_info (N) returns word N of the arg space info |
8146 | for the current function. The number and meanings of words | |
8147 | is controlled by the definition of CUMULATIVE_ARGS. */ | |
8148 | case BUILT_IN_ARGS_INFO: | |
8149 | { | |
8150 | int nwords = sizeof (CUMULATIVE_ARGS) / sizeof (int); | |
b93a436e | 8151 | int *word_ptr = (int *) ¤t_function_args_info; |
381127e8 RL |
8152 | #if 0 |
8153 | /* These are used by the code below that is if 0'ed away */ | |
8154 | int i; | |
b93a436e | 8155 | tree type, elts, result; |
381127e8 | 8156 | #endif |
bbf6f052 | 8157 | |
b93a436e JL |
8158 | if (sizeof (CUMULATIVE_ARGS) % sizeof (int) != 0) |
8159 | fatal ("CUMULATIVE_ARGS type defined badly; see %s, line %d", | |
8160 | __FILE__, __LINE__); | |
bbf6f052 | 8161 | |
b93a436e JL |
8162 | if (arglist != 0) |
8163 | { | |
8164 | tree arg = TREE_VALUE (arglist); | |
8165 | if (TREE_CODE (arg) != INTEGER_CST) | |
8166 | error ("argument of `__builtin_args_info' must be constant"); | |
8167 | else | |
8168 | { | |
8169 | int wordnum = TREE_INT_CST_LOW (arg); | |
bbf6f052 | 8170 | |
b93a436e JL |
8171 | if (wordnum < 0 || wordnum >= nwords || TREE_INT_CST_HIGH (arg)) |
8172 | error ("argument of `__builtin_args_info' out of range"); | |
8173 | else | |
8174 | return GEN_INT (word_ptr[wordnum]); | |
8175 | } | |
bbf6f052 RK |
8176 | } |
8177 | else | |
b93a436e | 8178 | error ("missing argument in `__builtin_args_info'"); |
bbf6f052 | 8179 | |
b93a436e | 8180 | return const0_rtx; |
bbf6f052 | 8181 | |
b93a436e JL |
8182 | #if 0 |
8183 | for (i = 0; i < nwords; i++) | |
8184 | elts = tree_cons (NULL_TREE, build_int_2 (word_ptr[i], 0)); | |
bbf6f052 | 8185 | |
b93a436e JL |
8186 | type = build_array_type (integer_type_node, |
8187 | build_index_type (build_int_2 (nwords, 0))); | |
8188 | result = build (CONSTRUCTOR, type, NULL_TREE, nreverse (elts)); | |
8189 | TREE_CONSTANT (result) = 1; | |
8190 | TREE_STATIC (result) = 1; | |
8191 | result = build (INDIRECT_REF, build_pointer_type (type), result); | |
8192 | TREE_CONSTANT (result) = 1; | |
8193 | return expand_expr (result, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_BAD); | |
8194 | #endif | |
8195 | } | |
8196 | ||
8197 | /* Return the address of the first anonymous stack arg. */ | |
8198 | case BUILT_IN_NEXT_ARG: | |
ca695ac9 | 8199 | { |
b93a436e JL |
8200 | tree fntype = TREE_TYPE (current_function_decl); |
8201 | ||
8202 | if ((TYPE_ARG_TYPES (fntype) == 0 | |
8203 | || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype))) | |
8204 | == void_type_node)) | |
8205 | && ! current_function_varargs) | |
8206 | { | |
8207 | error ("`va_start' used in function with fixed args"); | |
8208 | return const0_rtx; | |
8209 | } | |
8210 | ||
8211 | if (arglist) | |
8212 | { | |
8213 | tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl)); | |
8214 | tree arg = TREE_VALUE (arglist); | |
8215 | ||
8216 | /* Strip off all nops for the sake of the comparison. This | |
8217 | is not quite the same as STRIP_NOPS. It does more. | |
8218 | We must also strip off INDIRECT_EXPR for C++ reference | |
8219 | parameters. */ | |
8220 | while (TREE_CODE (arg) == NOP_EXPR | |
8221 | || TREE_CODE (arg) == CONVERT_EXPR | |
8222 | || TREE_CODE (arg) == NON_LVALUE_EXPR | |
8223 | || TREE_CODE (arg) == INDIRECT_REF) | |
8224 | arg = TREE_OPERAND (arg, 0); | |
8225 | if (arg != last_parm) | |
8226 | warning ("second parameter of `va_start' not last named argument"); | |
8227 | } | |
8228 | else if (! current_function_varargs) | |
8229 | /* Evidently an out of date version of <stdarg.h>; can't validate | |
8230 | va_start's second argument, but can still work as intended. */ | |
8231 | warning ("`__builtin_next_arg' called without an argument"); | |
bbf6f052 RK |
8232 | } |
8233 | ||
b93a436e JL |
8234 | return expand_binop (Pmode, add_optab, |
8235 | current_function_internal_arg_pointer, | |
8236 | current_function_arg_offset_rtx, | |
8237 | NULL_RTX, 0, OPTAB_LIB_WIDEN); | |
ca695ac9 | 8238 | |
b93a436e JL |
8239 | case BUILT_IN_CLASSIFY_TYPE: |
8240 | if (arglist != 0) | |
8241 | { | |
8242 | tree type = TREE_TYPE (TREE_VALUE (arglist)); | |
8243 | enum tree_code code = TREE_CODE (type); | |
8244 | if (code == VOID_TYPE) | |
8245 | return GEN_INT (void_type_class); | |
8246 | if (code == INTEGER_TYPE) | |
8247 | return GEN_INT (integer_type_class); | |
8248 | if (code == CHAR_TYPE) | |
8249 | return GEN_INT (char_type_class); | |
8250 | if (code == ENUMERAL_TYPE) | |
8251 | return GEN_INT (enumeral_type_class); | |
8252 | if (code == BOOLEAN_TYPE) | |
8253 | return GEN_INT (boolean_type_class); | |
8254 | if (code == POINTER_TYPE) | |
8255 | return GEN_INT (pointer_type_class); | |
8256 | if (code == REFERENCE_TYPE) | |
8257 | return GEN_INT (reference_type_class); | |
8258 | if (code == OFFSET_TYPE) | |
8259 | return GEN_INT (offset_type_class); | |
8260 | if (code == REAL_TYPE) | |
8261 | return GEN_INT (real_type_class); | |
8262 | if (code == COMPLEX_TYPE) | |
8263 | return GEN_INT (complex_type_class); | |
8264 | if (code == FUNCTION_TYPE) | |
8265 | return GEN_INT (function_type_class); | |
8266 | if (code == METHOD_TYPE) | |
8267 | return GEN_INT (method_type_class); | |
8268 | if (code == RECORD_TYPE) | |
8269 | return GEN_INT (record_type_class); | |
8270 | if (code == UNION_TYPE || code == QUAL_UNION_TYPE) | |
8271 | return GEN_INT (union_type_class); | |
8272 | if (code == ARRAY_TYPE) | |
8273 | { | |
8274 | if (TYPE_STRING_FLAG (type)) | |
8275 | return GEN_INT (string_type_class); | |
8276 | else | |
8277 | return GEN_INT (array_type_class); | |
8278 | } | |
8279 | if (code == SET_TYPE) | |
8280 | return GEN_INT (set_type_class); | |
8281 | if (code == FILE_TYPE) | |
8282 | return GEN_INT (file_type_class); | |
8283 | if (code == LANG_TYPE) | |
8284 | return GEN_INT (lang_type_class); | |
8285 | } | |
8286 | return GEN_INT (no_type_class); | |
ca695ac9 | 8287 | |
b93a436e JL |
8288 | case BUILT_IN_CONSTANT_P: |
8289 | if (arglist == 0) | |
8290 | return const0_rtx; | |
8291 | else | |
8292 | { | |
8293 | tree arg = TREE_VALUE (arglist); | |
ca695ac9 | 8294 | |
b93a436e JL |
8295 | STRIP_NOPS (arg); |
8296 | return (TREE_CODE_CLASS (TREE_CODE (arg)) == 'c' | |
8297 | || (TREE_CODE (arg) == ADDR_EXPR | |
8298 | && TREE_CODE (TREE_OPERAND (arg, 0)) == STRING_CST) | |
8299 | ? const1_rtx : const0_rtx); | |
8300 | } | |
ca695ac9 | 8301 | |
b93a436e JL |
8302 | case BUILT_IN_FRAME_ADDRESS: |
8303 | /* The argument must be a nonnegative integer constant. | |
8304 | It counts the number of frames to scan up the stack. | |
8305 | The value is the address of that frame. */ | |
8306 | case BUILT_IN_RETURN_ADDRESS: | |
8307 | /* The argument must be a nonnegative integer constant. | |
8308 | It counts the number of frames to scan up the stack. | |
8309 | The value is the return address saved in that frame. */ | |
8310 | if (arglist == 0) | |
8311 | /* Warning about missing arg was already issued. */ | |
8312 | return const0_rtx; | |
8313 | else if (TREE_CODE (TREE_VALUE (arglist)) != INTEGER_CST | |
8314 | || tree_int_cst_sgn (TREE_VALUE (arglist)) < 0) | |
8315 | { | |
8316 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
8317 | error ("invalid arg to `__builtin_frame_address'"); | |
8318 | else | |
8319 | error ("invalid arg to `__builtin_return_address'"); | |
8320 | return const0_rtx; | |
8321 | } | |
8322 | else | |
8323 | { | |
8324 | rtx tem = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl), | |
8325 | TREE_INT_CST_LOW (TREE_VALUE (arglist)), | |
8326 | hard_frame_pointer_rtx); | |
ee33823f | 8327 | |
b93a436e JL |
8328 | /* Some ports cannot access arbitrary stack frames. */ |
8329 | if (tem == NULL) | |
8330 | { | |
8331 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
8332 | warning ("unsupported arg to `__builtin_frame_address'"); | |
8333 | else | |
8334 | warning ("unsupported arg to `__builtin_return_address'"); | |
8335 | return const0_rtx; | |
8336 | } | |
ee33823f | 8337 | |
b93a436e JL |
8338 | /* For __builtin_frame_address, return what we've got. */ |
8339 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS) | |
8340 | return tem; | |
ee33823f | 8341 | |
b93a436e JL |
8342 | if (GET_CODE (tem) != REG) |
8343 | tem = copy_to_reg (tem); | |
8344 | return tem; | |
8345 | } | |
ee33823f | 8346 | |
b93a436e JL |
8347 | /* Returns the address of the area where the structure is returned. |
8348 | 0 otherwise. */ | |
8349 | case BUILT_IN_AGGREGATE_INCOMING_ADDRESS: | |
8350 | if (arglist != 0 | |
8351 | || ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl))) | |
8352 | || GET_CODE (DECL_RTL (DECL_RESULT (current_function_decl))) != MEM) | |
8353 | return const0_rtx; | |
8354 | else | |
8355 | return XEXP (DECL_RTL (DECL_RESULT (current_function_decl)), 0); | |
ee33823f | 8356 | |
b93a436e JL |
8357 | case BUILT_IN_ALLOCA: |
8358 | if (arglist == 0 | |
8359 | /* Arg could be non-integer if user redeclared this fcn wrong. */ | |
8360 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != INTEGER_TYPE) | |
8361 | break; | |
bbf6f052 | 8362 | |
b93a436e JL |
8363 | /* Compute the argument. */ |
8364 | op0 = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0); | |
bbf6f052 | 8365 | |
b93a436e JL |
8366 | /* Allocate the desired space. */ |
8367 | return allocate_dynamic_stack_space (op0, target, BITS_PER_UNIT); | |
ca695ac9 | 8368 | |
b93a436e JL |
8369 | case BUILT_IN_FFS: |
8370 | /* If not optimizing, call the library function. */ | |
8371 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8372 | break; | |
ca695ac9 | 8373 | |
b93a436e JL |
8374 | if (arglist == 0 |
8375 | /* Arg could be non-integer if user redeclared this fcn wrong. */ | |
8376 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != INTEGER_TYPE) | |
8377 | break; | |
ca695ac9 | 8378 | |
b93a436e JL |
8379 | /* Compute the argument. */ |
8380 | op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0); | |
8381 | /* Compute ffs, into TARGET if possible. | |
8382 | Set TARGET to wherever the result comes back. */ | |
8383 | target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))), | |
8384 | ffs_optab, op0, target, 1); | |
8385 | if (target == 0) | |
8386 | abort (); | |
8387 | return target; | |
bbf6f052 | 8388 | |
b93a436e JL |
8389 | case BUILT_IN_STRLEN: |
8390 | /* If not optimizing, call the library function. */ | |
8391 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8392 | break; | |
bbf6f052 | 8393 | |
b93a436e JL |
8394 | if (arglist == 0 |
8395 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
8396 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE) | |
8397 | break; | |
8398 | else | |
8399 | { | |
8400 | tree src = TREE_VALUE (arglist); | |
8401 | tree len = c_strlen (src); | |
bbf6f052 | 8402 | |
b93a436e JL |
8403 | int align |
8404 | = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
46b68a37 | 8405 | |
b93a436e JL |
8406 | rtx result, src_rtx, char_rtx; |
8407 | enum machine_mode insn_mode = value_mode, char_mode; | |
8408 | enum insn_code icode; | |
46b68a37 | 8409 | |
b93a436e JL |
8410 | /* If the length is known, just return it. */ |
8411 | if (len != 0) | |
8412 | return expand_expr (len, target, mode, EXPAND_MEMORY_USE_BAD); | |
956d6950 | 8413 | |
b93a436e JL |
8414 | /* If SRC is not a pointer type, don't do this operation inline. */ |
8415 | if (align == 0) | |
8416 | break; | |
bbf6f052 | 8417 | |
b93a436e | 8418 | /* Call a function if we can't compute strlen in the right mode. */ |
bbf6f052 | 8419 | |
b93a436e JL |
8420 | while (insn_mode != VOIDmode) |
8421 | { | |
8422 | icode = strlen_optab->handlers[(int) insn_mode].insn_code; | |
8423 | if (icode != CODE_FOR_nothing) | |
8424 | break; | |
ca695ac9 | 8425 | |
b93a436e JL |
8426 | insn_mode = GET_MODE_WIDER_MODE (insn_mode); |
8427 | } | |
8428 | if (insn_mode == VOIDmode) | |
8429 | break; | |
ca695ac9 | 8430 | |
b93a436e JL |
8431 | /* Make a place to write the result of the instruction. */ |
8432 | result = target; | |
8433 | if (! (result != 0 | |
8434 | && GET_CODE (result) == REG | |
8435 | && GET_MODE (result) == insn_mode | |
8436 | && REGNO (result) >= FIRST_PSEUDO_REGISTER)) | |
8437 | result = gen_reg_rtx (insn_mode); | |
ca695ac9 | 8438 | |
b93a436e | 8439 | /* Make sure the operands are acceptable to the predicates. */ |
ca695ac9 | 8440 | |
b93a436e JL |
8441 | if (! (*insn_operand_predicate[(int)icode][0]) (result, insn_mode)) |
8442 | result = gen_reg_rtx (insn_mode); | |
8443 | src_rtx = memory_address (BLKmode, | |
8444 | expand_expr (src, NULL_RTX, ptr_mode, | |
8445 | EXPAND_NORMAL)); | |
bbf6f052 | 8446 | |
b93a436e JL |
8447 | if (! (*insn_operand_predicate[(int)icode][1]) (src_rtx, Pmode)) |
8448 | src_rtx = copy_to_mode_reg (Pmode, src_rtx); | |
bbf6f052 | 8449 | |
b93a436e JL |
8450 | /* Check the string is readable and has an end. */ |
8451 | if (flag_check_memory_usage) | |
8452 | emit_library_call (chkr_check_str_libfunc, 1, VOIDmode, 2, | |
8453 | src_rtx, ptr_mode, | |
8454 | GEN_INT (MEMORY_USE_RO), | |
8455 | TYPE_MODE (integer_type_node)); | |
bbf6f052 | 8456 | |
b93a436e JL |
8457 | char_rtx = const0_rtx; |
8458 | char_mode = insn_operand_mode[(int)icode][2]; | |
8459 | if (! (*insn_operand_predicate[(int)icode][2]) (char_rtx, char_mode)) | |
8460 | char_rtx = copy_to_mode_reg (char_mode, char_rtx); | |
bbf6f052 | 8461 | |
b93a436e JL |
8462 | emit_insn (GEN_FCN (icode) (result, |
8463 | gen_rtx_MEM (BLKmode, src_rtx), | |
8464 | char_rtx, GEN_INT (align))); | |
bbf6f052 | 8465 | |
b93a436e JL |
8466 | /* Return the value in the proper mode for this function. */ |
8467 | if (GET_MODE (result) == value_mode) | |
8468 | return result; | |
8469 | else if (target != 0) | |
8470 | { | |
8471 | convert_move (target, result, 0); | |
8472 | return target; | |
8473 | } | |
8474 | else | |
8475 | return convert_to_mode (value_mode, result, 0); | |
8476 | } | |
bbf6f052 | 8477 | |
b93a436e JL |
8478 | case BUILT_IN_STRCPY: |
8479 | /* If not optimizing, call the library function. */ | |
8480 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8481 | break; | |
bbf6f052 | 8482 | |
b93a436e JL |
8483 | if (arglist == 0 |
8484 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
8485 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
8486 | || TREE_CHAIN (arglist) == 0 | |
8487 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE) | |
8488 | break; | |
8489 | else | |
8490 | { | |
8491 | tree len = c_strlen (TREE_VALUE (TREE_CHAIN (arglist))); | |
bbf6f052 | 8492 | |
b93a436e JL |
8493 | if (len == 0) |
8494 | break; | |
bbf6f052 | 8495 | |
b93a436e | 8496 | len = size_binop (PLUS_EXPR, len, integer_one_node); |
6d100794 | 8497 | |
b93a436e JL |
8498 | chainon (arglist, build_tree_list (NULL_TREE, len)); |
8499 | } | |
6d100794 | 8500 | |
b93a436e JL |
8501 | /* Drops in. */ |
8502 | case BUILT_IN_MEMCPY: | |
8503 | /* If not optimizing, call the library function. */ | |
8504 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8505 | break; | |
e7c33f54 | 8506 | |
b93a436e JL |
8507 | if (arglist == 0 |
8508 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
8509 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
8510 | || TREE_CHAIN (arglist) == 0 | |
8511 | || (TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) | |
8512 | != POINTER_TYPE) | |
8513 | || TREE_CHAIN (TREE_CHAIN (arglist)) == 0 | |
8514 | || (TREE_CODE (TREE_TYPE (TREE_VALUE | |
8515 | (TREE_CHAIN (TREE_CHAIN (arglist))))) | |
8516 | != INTEGER_TYPE)) | |
8517 | break; | |
8518 | else | |
8519 | { | |
8520 | tree dest = TREE_VALUE (arglist); | |
8521 | tree src = TREE_VALUE (TREE_CHAIN (arglist)); | |
8522 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
8523 | tree type; | |
e7c33f54 | 8524 | |
b93a436e JL |
8525 | int src_align |
8526 | = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
8527 | int dest_align | |
8528 | = get_pointer_alignment (dest, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
8529 | rtx dest_rtx, dest_mem, src_mem, src_rtx, dest_addr, len_rtx; | |
e7c33f54 | 8530 | |
b93a436e JL |
8531 | /* If either SRC or DEST is not a pointer type, don't do |
8532 | this operation in-line. */ | |
8533 | if (src_align == 0 || dest_align == 0) | |
8534 | { | |
8535 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_STRCPY) | |
8536 | TREE_CHAIN (TREE_CHAIN (arglist)) = 0; | |
8537 | break; | |
8538 | } | |
e7c33f54 | 8539 | |
b93a436e JL |
8540 | dest_rtx = expand_expr (dest, NULL_RTX, ptr_mode, EXPAND_SUM); |
8541 | dest_mem = gen_rtx_MEM (BLKmode, | |
8542 | memory_address (BLKmode, dest_rtx)); | |
8543 | /* There could be a void* cast on top of the object. */ | |
8544 | while (TREE_CODE (dest) == NOP_EXPR) | |
8545 | dest = TREE_OPERAND (dest, 0); | |
8546 | type = TREE_TYPE (TREE_TYPE (dest)); | |
8547 | MEM_IN_STRUCT_P (dest_mem) = AGGREGATE_TYPE_P (type); | |
8548 | src_rtx = expand_expr (src, NULL_RTX, ptr_mode, EXPAND_SUM); | |
8549 | src_mem = gen_rtx_MEM (BLKmode, | |
8550 | memory_address (BLKmode, src_rtx)); | |
8551 | len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0); | |
e7c33f54 | 8552 | |
b93a436e JL |
8553 | /* Just copy the rights of SRC to the rights of DEST. */ |
8554 | if (flag_check_memory_usage) | |
8555 | emit_library_call (chkr_copy_bitmap_libfunc, 1, VOIDmode, 3, | |
8556 | dest_rtx, ptr_mode, | |
8557 | src_rtx, ptr_mode, | |
8558 | len_rtx, TYPE_MODE (sizetype)); | |
e7c33f54 | 8559 | |
b93a436e JL |
8560 | /* There could be a void* cast on top of the object. */ |
8561 | while (TREE_CODE (src) == NOP_EXPR) | |
8562 | src = TREE_OPERAND (src, 0); | |
8563 | type = TREE_TYPE (TREE_TYPE (src)); | |
8564 | MEM_IN_STRUCT_P (src_mem) = AGGREGATE_TYPE_P (type); | |
e7c33f54 | 8565 | |
b93a436e JL |
8566 | /* Copy word part most expediently. */ |
8567 | dest_addr | |
8568 | = emit_block_move (dest_mem, src_mem, len_rtx, | |
8569 | MIN (src_align, dest_align)); | |
e7c33f54 | 8570 | |
b93a436e JL |
8571 | if (dest_addr == 0) |
8572 | dest_addr = force_operand (dest_rtx, NULL_RTX); | |
e7c33f54 | 8573 | |
b93a436e JL |
8574 | return dest_addr; |
8575 | } | |
e7c33f54 | 8576 | |
b93a436e JL |
8577 | case BUILT_IN_MEMSET: |
8578 | /* If not optimizing, call the library function. */ | |
8579 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8580 | break; | |
e7c33f54 | 8581 | |
b93a436e JL |
8582 | if (arglist == 0 |
8583 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
8584 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
8585 | || TREE_CHAIN (arglist) == 0 | |
8586 | || (TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) | |
8587 | != INTEGER_TYPE) | |
8588 | || TREE_CHAIN (TREE_CHAIN (arglist)) == 0 | |
8589 | || (INTEGER_TYPE | |
8590 | != (TREE_CODE (TREE_TYPE | |
8591 | (TREE_VALUE | |
8592 | (TREE_CHAIN (TREE_CHAIN (arglist)))))))) | |
8593 | break; | |
8594 | else | |
8595 | { | |
8596 | tree dest = TREE_VALUE (arglist); | |
8597 | tree val = TREE_VALUE (TREE_CHAIN (arglist)); | |
8598 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
8599 | tree type; | |
e7c33f54 | 8600 | |
b93a436e JL |
8601 | int dest_align |
8602 | = get_pointer_alignment (dest, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
8603 | rtx dest_rtx, dest_mem, dest_addr, len_rtx; | |
e7c33f54 | 8604 | |
b93a436e JL |
8605 | /* If DEST is not a pointer type, don't do this |
8606 | operation in-line. */ | |
8607 | if (dest_align == 0) | |
8608 | break; | |
bbf6f052 | 8609 | |
bf931ec8 JW |
8610 | /* If the arguments have side-effects, then we can only evaluate |
8611 | them at most once. The following code evaluates them twice if | |
8612 | they are not constants because we break out to expand_call | |
8613 | in that case. They can't be constants if they have side-effects | |
8614 | so we can check for that first. Alternatively, we could call | |
8615 | save_expr to make multiple evaluation safe. */ | |
8616 | if (TREE_SIDE_EFFECTS (val) || TREE_SIDE_EFFECTS (len)) | |
8617 | break; | |
8618 | ||
b93a436e JL |
8619 | /* If VAL is not 0, don't do this operation in-line. */ |
8620 | if (expand_expr (val, NULL_RTX, VOIDmode, 0) != const0_rtx) | |
8621 | break; | |
bbf6f052 | 8622 | |
b93a436e JL |
8623 | /* If LEN does not expand to a constant, don't do this |
8624 | operation in-line. */ | |
8625 | len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0); | |
8626 | if (GET_CODE (len_rtx) != CONST_INT) | |
8627 | break; | |
bbf6f052 | 8628 | |
b93a436e JL |
8629 | dest_rtx = expand_expr (dest, NULL_RTX, ptr_mode, EXPAND_SUM); |
8630 | dest_mem = gen_rtx_MEM (BLKmode, | |
8631 | memory_address (BLKmode, dest_rtx)); | |
8632 | ||
8633 | /* Just check DST is writable and mark it as readable. */ | |
8634 | if (flag_check_memory_usage) | |
8635 | emit_library_call (chkr_check_addr_libfunc, 1, VOIDmode, 3, | |
8636 | dest_rtx, ptr_mode, | |
8637 | len_rtx, TYPE_MODE (sizetype), | |
8638 | GEN_INT (MEMORY_USE_WO), | |
8639 | TYPE_MODE (integer_type_node)); | |
bbf6f052 | 8640 | |
b93a436e JL |
8641 | /* There could be a void* cast on top of the object. */ |
8642 | while (TREE_CODE (dest) == NOP_EXPR) | |
8643 | dest = TREE_OPERAND (dest, 0); | |
87d1ea79 JC |
8644 | |
8645 | if (TREE_CODE (dest) == ADDR_EXPR) | |
8646 | /* If this is the address of an object, check whether the | |
8647 | object is an array. */ | |
8648 | type = TREE_TYPE (TREE_OPERAND (dest, 0)); | |
8649 | else | |
8650 | type = TREE_TYPE (TREE_TYPE (dest)); | |
b93a436e | 8651 | MEM_IN_STRUCT_P (dest_mem) = AGGREGATE_TYPE_P (type); |
bbf6f052 | 8652 | |
b93a436e | 8653 | dest_addr = clear_storage (dest_mem, len_rtx, dest_align); |
bbf6f052 | 8654 | |
b93a436e JL |
8655 | if (dest_addr == 0) |
8656 | dest_addr = force_operand (dest_rtx, NULL_RTX); | |
bbf6f052 | 8657 | |
b93a436e JL |
8658 | return dest_addr; |
8659 | } | |
bbf6f052 | 8660 | |
b93a436e JL |
8661 | /* These comparison functions need an instruction that returns an actual |
8662 | index. An ordinary compare that just sets the condition codes | |
8663 | is not enough. */ | |
8664 | #ifdef HAVE_cmpstrsi | |
8665 | case BUILT_IN_STRCMP: | |
8666 | /* If not optimizing, call the library function. */ | |
8667 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8668 | break; | |
bbf6f052 | 8669 | |
b93a436e JL |
8670 | /* If we need to check memory accesses, call the library function. */ |
8671 | if (flag_check_memory_usage) | |
8672 | break; | |
bbf6f052 | 8673 | |
b93a436e JL |
8674 | if (arglist == 0 |
8675 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
8676 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
8677 | || TREE_CHAIN (arglist) == 0 | |
8678 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE) | |
8679 | break; | |
8680 | else if (!HAVE_cmpstrsi) | |
8681 | break; | |
8682 | { | |
8683 | tree arg1 = TREE_VALUE (arglist); | |
8684 | tree arg2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
b93a436e | 8685 | tree len, len2; |
a97f5a86 | 8686 | |
b93a436e JL |
8687 | len = c_strlen (arg1); |
8688 | if (len) | |
8689 | len = size_binop (PLUS_EXPR, integer_one_node, len); | |
8690 | len2 = c_strlen (arg2); | |
8691 | if (len2) | |
8692 | len2 = size_binop (PLUS_EXPR, integer_one_node, len2); | |
e9cdf6e4 | 8693 | |
b93a436e JL |
8694 | /* If we don't have a constant length for the first, use the length |
8695 | of the second, if we know it. We don't require a constant for | |
8696 | this case; some cost analysis could be done if both are available | |
8697 | but neither is constant. For now, assume they're equally cheap. | |
e9cdf6e4 | 8698 | |
b93a436e JL |
8699 | If both strings have constant lengths, use the smaller. This |
8700 | could arise if optimization results in strcpy being called with | |
8701 | two fixed strings, or if the code was machine-generated. We should | |
8702 | add some code to the `memcmp' handler below to deal with such | |
8703 | situations, someday. */ | |
8704 | if (!len || TREE_CODE (len) != INTEGER_CST) | |
8705 | { | |
8706 | if (len2) | |
8707 | len = len2; | |
8708 | else if (len == 0) | |
8709 | break; | |
8710 | } | |
8711 | else if (len2 && TREE_CODE (len2) == INTEGER_CST) | |
8712 | { | |
8713 | if (tree_int_cst_lt (len2, len)) | |
8714 | len = len2; | |
8715 | } | |
bbf6f052 | 8716 | |
b93a436e JL |
8717 | chainon (arglist, build_tree_list (NULL_TREE, len)); |
8718 | } | |
bbf6f052 | 8719 | |
b93a436e JL |
8720 | /* Drops in. */ |
8721 | case BUILT_IN_MEMCMP: | |
8722 | /* If not optimizing, call the library function. */ | |
8723 | if (!optimize && ! CALLED_AS_BUILT_IN (fndecl)) | |
8724 | break; | |
bbf6f052 | 8725 | |
b93a436e JL |
8726 | /* If we need to check memory accesses, call the library function. */ |
8727 | if (flag_check_memory_usage) | |
8728 | break; | |
bbf6f052 | 8729 | |
b93a436e JL |
8730 | if (arglist == 0 |
8731 | /* Arg could be non-pointer if user redeclared this fcn wrong. */ | |
8732 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE | |
8733 | || TREE_CHAIN (arglist) == 0 | |
8734 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (arglist)))) != POINTER_TYPE | |
8735 | || TREE_CHAIN (TREE_CHAIN (arglist)) == 0 | |
8736 | || TREE_CODE (TREE_TYPE (TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))))) != INTEGER_TYPE) | |
8737 | break; | |
8738 | else if (!HAVE_cmpstrsi) | |
8739 | break; | |
8740 | { | |
8741 | tree arg1 = TREE_VALUE (arglist); | |
8742 | tree arg2 = TREE_VALUE (TREE_CHAIN (arglist)); | |
8743 | tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist))); | |
8744 | rtx result; | |
0842a179 | 8745 | |
b93a436e JL |
8746 | int arg1_align |
8747 | = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
8748 | int arg2_align | |
8749 | = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT; | |
8750 | enum machine_mode insn_mode | |
8751 | = insn_operand_mode[(int) CODE_FOR_cmpstrsi][0]; | |
0842a179 | 8752 | |
b93a436e JL |
8753 | /* If we don't have POINTER_TYPE, call the function. */ |
8754 | if (arg1_align == 0 || arg2_align == 0) | |
8755 | { | |
8756 | if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_STRCMP) | |
8757 | TREE_CHAIN (TREE_CHAIN (arglist)) = 0; | |
8758 | break; | |
8759 | } | |
bbf6f052 | 8760 | |
b93a436e JL |
8761 | /* Make a place to write the result of the instruction. */ |
8762 | result = target; | |
8763 | if (! (result != 0 | |
8764 | && GET_CODE (result) == REG && GET_MODE (result) == insn_mode | |
8765 | && REGNO (result) >= FIRST_PSEUDO_REGISTER)) | |
8766 | result = gen_reg_rtx (insn_mode); | |
bbf6f052 | 8767 | |
b93a436e JL |
8768 | emit_insn (gen_cmpstrsi (result, |
8769 | gen_rtx_MEM (BLKmode, | |
8770 | expand_expr (arg1, NULL_RTX, | |
8771 | ptr_mode, | |
8772 | EXPAND_NORMAL)), | |
8773 | gen_rtx_MEM (BLKmode, | |
8774 | expand_expr (arg2, NULL_RTX, | |
8775 | ptr_mode, | |
8776 | EXPAND_NORMAL)), | |
8777 | expand_expr (len, NULL_RTX, VOIDmode, 0), | |
8778 | GEN_INT (MIN (arg1_align, arg2_align)))); | |
bbf6f052 | 8779 | |
b93a436e JL |
8780 | /* Return the value in the proper mode for this function. */ |
8781 | mode = TYPE_MODE (TREE_TYPE (exp)); | |
8782 | if (GET_MODE (result) == mode) | |
8783 | return result; | |
8784 | else if (target != 0) | |
8785 | { | |
8786 | convert_move (target, result, 0); | |
8787 | return target; | |
8788 | } | |
8789 | else | |
8790 | return convert_to_mode (mode, result, 0); | |
8791 | } | |
8792 | #else | |
8793 | case BUILT_IN_STRCMP: | |
8794 | case BUILT_IN_MEMCMP: | |
8795 | break; | |
8796 | #endif | |
bbf6f052 | 8797 | |
b93a436e JL |
8798 | case BUILT_IN_SETJMP: |
8799 | if (arglist == 0 | |
8800 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE) | |
8801 | break; | |
6fd1c67b RH |
8802 | else |
8803 | { | |
8804 | rtx buf_addr = expand_expr (TREE_VALUE (arglist), subtarget, | |
8805 | VOIDmode, 0); | |
8806 | rtx lab = gen_label_rtx (); | |
8807 | rtx ret = expand_builtin_setjmp (buf_addr, target, lab, lab); | |
8808 | emit_label (lab); | |
8809 | return ret; | |
8810 | } | |
bbf6f052 | 8811 | |
6fd1c67b RH |
8812 | /* __builtin_longjmp is passed a pointer to an array of five words. |
8813 | It's similar to the C library longjmp function but works with | |
8814 | __builtin_setjmp above. */ | |
b93a436e JL |
8815 | case BUILT_IN_LONGJMP: |
8816 | if (arglist == 0 || TREE_CHAIN (arglist) == 0 | |
8817 | || TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE) | |
8818 | break; | |
b93a436e | 8819 | else |
b93a436e | 8820 | { |
6fd1c67b RH |
8821 | rtx buf_addr = expand_expr (TREE_VALUE (arglist), subtarget, |
8822 | VOIDmode, 0); | |
8823 | rtx value = expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), | |
8824 | const0_rtx, VOIDmode, 0); | |
8825 | expand_builtin_longjmp (buf_addr, value); | |
8826 | return const0_rtx; | |
b93a436e | 8827 | } |
bbf6f052 | 8828 | |
b93a436e JL |
8829 | /* Various hooks for the DWARF 2 __throw routine. */ |
8830 | case BUILT_IN_UNWIND_INIT: | |
8831 | expand_builtin_unwind_init (); | |
8832 | return const0_rtx; | |
8833 | case BUILT_IN_FP: | |
8834 | return frame_pointer_rtx; | |
8835 | case BUILT_IN_SP: | |
8836 | return stack_pointer_rtx; | |
8837 | #ifdef DWARF2_UNWIND_INFO | |
8838 | case BUILT_IN_DWARF_FP_REGNUM: | |
8839 | return expand_builtin_dwarf_fp_regnum (); | |
8840 | case BUILT_IN_DWARF_REG_SIZE: | |
8841 | return expand_builtin_dwarf_reg_size (TREE_VALUE (arglist), target); | |
fb2ca25a | 8842 | #endif |
b93a436e JL |
8843 | case BUILT_IN_FROB_RETURN_ADDR: |
8844 | return expand_builtin_frob_return_addr (TREE_VALUE (arglist)); | |
8845 | case BUILT_IN_EXTRACT_RETURN_ADDR: | |
8846 | return expand_builtin_extract_return_addr (TREE_VALUE (arglist)); | |
8847 | case BUILT_IN_SET_RETURN_ADDR_REG: | |
8848 | expand_builtin_set_return_addr_reg (TREE_VALUE (arglist)); | |
8849 | return const0_rtx; | |
8850 | case BUILT_IN_EH_STUB: | |
8851 | return expand_builtin_eh_stub (); | |
8852 | case BUILT_IN_SET_EH_REGS: | |
8853 | expand_builtin_set_eh_regs (TREE_VALUE (arglist), | |
8854 | TREE_VALUE (TREE_CHAIN (arglist))); | |
8855 | return const0_rtx; | |
ca695ac9 | 8856 | |
b93a436e JL |
8857 | default: /* just do library call, if unknown builtin */ |
8858 | error ("built-in function `%s' not currently supported", | |
8859 | IDENTIFIER_POINTER (DECL_NAME (fndecl))); | |
ca695ac9 | 8860 | } |
0006469d | 8861 | |
b93a436e JL |
8862 | /* The switch statement above can drop through to cause the function |
8863 | to be called normally. */ | |
0006469d | 8864 | |
b93a436e | 8865 | return expand_call (exp, target, ignore); |
ca695ac9 | 8866 | } |
b93a436e JL |
8867 | \f |
8868 | /* Built-in functions to perform an untyped call and return. */ | |
0006469d | 8869 | |
b93a436e JL |
8870 | /* For each register that may be used for calling a function, this |
8871 | gives a mode used to copy the register's value. VOIDmode indicates | |
8872 | the register is not used for calling a function. If the machine | |
8873 | has register windows, this gives only the outbound registers. | |
8874 | INCOMING_REGNO gives the corresponding inbound register. */ | |
8875 | static enum machine_mode apply_args_mode[FIRST_PSEUDO_REGISTER]; | |
0006469d | 8876 | |
b93a436e JL |
8877 | /* For each register that may be used for returning values, this gives |
8878 | a mode used to copy the register's value. VOIDmode indicates the | |
8879 | register is not used for returning values. If the machine has | |
8880 | register windows, this gives only the outbound registers. | |
8881 | INCOMING_REGNO gives the corresponding inbound register. */ | |
8882 | static enum machine_mode apply_result_mode[FIRST_PSEUDO_REGISTER]; | |
0006469d | 8883 | |
b93a436e JL |
8884 | /* For each register that may be used for calling a function, this |
8885 | gives the offset of that register into the block returned by | |
8886 | __builtin_apply_args. 0 indicates that the register is not | |
8887 | used for calling a function. */ | |
8888 | static int apply_args_reg_offset[FIRST_PSEUDO_REGISTER]; | |
8889 | ||
8890 | /* Return the offset of register REGNO into the block returned by | |
8891 | __builtin_apply_args. This is not declared static, since it is | |
8892 | needed in objc-act.c. */ | |
0006469d | 8893 | |
b93a436e JL |
8894 | int |
8895 | apply_args_register_offset (regno) | |
8896 | int regno; | |
8897 | { | |
8898 | apply_args_size (); | |
0006469d | 8899 | |
b93a436e JL |
8900 | /* Arguments are always put in outgoing registers (in the argument |
8901 | block) if such make sense. */ | |
8902 | #ifdef OUTGOING_REGNO | |
8903 | regno = OUTGOING_REGNO(regno); | |
8904 | #endif | |
8905 | return apply_args_reg_offset[regno]; | |
8906 | } | |
904762c8 | 8907 | |
b93a436e JL |
8908 | /* Return the size required for the block returned by __builtin_apply_args, |
8909 | and initialize apply_args_mode. */ | |
8910 | ||
8911 | static int | |
8912 | apply_args_size () | |
0006469d | 8913 | { |
b93a436e JL |
8914 | static int size = -1; |
8915 | int align, regno; | |
2f6e6d22 | 8916 | enum machine_mode mode; |
0006469d | 8917 | |
b93a436e JL |
8918 | /* The values computed by this function never change. */ |
8919 | if (size < 0) | |
ca695ac9 | 8920 | { |
b93a436e JL |
8921 | /* The first value is the incoming arg-pointer. */ |
8922 | size = GET_MODE_SIZE (Pmode); | |
0006469d | 8923 | |
b93a436e JL |
8924 | /* The second value is the structure value address unless this is |
8925 | passed as an "invisible" first argument. */ | |
8926 | if (struct_value_rtx) | |
8927 | size += GET_MODE_SIZE (Pmode); | |
0006469d | 8928 | |
b93a436e JL |
8929 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) |
8930 | if (FUNCTION_ARG_REGNO_P (regno)) | |
8931 | { | |
8932 | /* Search for the proper mode for copying this register's | |
8933 | value. I'm not sure this is right, but it works so far. */ | |
8934 | enum machine_mode best_mode = VOIDmode; | |
0006469d | 8935 | |
b93a436e JL |
8936 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); |
8937 | mode != VOIDmode; | |
8938 | mode = GET_MODE_WIDER_MODE (mode)) | |
8939 | if (HARD_REGNO_MODE_OK (regno, mode) | |
8940 | && HARD_REGNO_NREGS (regno, mode) == 1) | |
8941 | best_mode = mode; | |
0006469d | 8942 | |
b93a436e JL |
8943 | if (best_mode == VOIDmode) |
8944 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); | |
8945 | mode != VOIDmode; | |
8946 | mode = GET_MODE_WIDER_MODE (mode)) | |
8947 | if (HARD_REGNO_MODE_OK (regno, mode) | |
8948 | && (mov_optab->handlers[(int) mode].insn_code | |
8949 | != CODE_FOR_nothing)) | |
8950 | best_mode = mode; | |
0006469d | 8951 | |
b93a436e JL |
8952 | mode = best_mode; |
8953 | if (mode == VOIDmode) | |
8954 | abort (); | |
904762c8 | 8955 | |
b93a436e JL |
8956 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; |
8957 | if (size % align != 0) | |
8958 | size = CEIL (size, align) * align; | |
8959 | apply_args_reg_offset[regno] = size; | |
8960 | size += GET_MODE_SIZE (mode); | |
8961 | apply_args_mode[regno] = mode; | |
8962 | } | |
8963 | else | |
8964 | { | |
8965 | apply_args_mode[regno] = VOIDmode; | |
8966 | apply_args_reg_offset[regno] = 0; | |
8967 | } | |
8968 | } | |
8969 | return size; | |
8970 | } | |
0006469d | 8971 | |
b93a436e JL |
8972 | /* Return the size required for the block returned by __builtin_apply, |
8973 | and initialize apply_result_mode. */ | |
904762c8 | 8974 | |
b93a436e JL |
8975 | static int |
8976 | apply_result_size () | |
8977 | { | |
8978 | static int size = -1; | |
8979 | int align, regno; | |
8980 | enum machine_mode mode; | |
0006469d | 8981 | |
b93a436e JL |
8982 | /* The values computed by this function never change. */ |
8983 | if (size < 0) | |
8984 | { | |
8985 | size = 0; | |
0006469d | 8986 | |
b93a436e JL |
8987 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) |
8988 | if (FUNCTION_VALUE_REGNO_P (regno)) | |
8989 | { | |
8990 | /* Search for the proper mode for copying this register's | |
8991 | value. I'm not sure this is right, but it works so far. */ | |
8992 | enum machine_mode best_mode = VOIDmode; | |
0006469d | 8993 | |
b93a436e JL |
8994 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); |
8995 | mode != TImode; | |
8996 | mode = GET_MODE_WIDER_MODE (mode)) | |
8997 | if (HARD_REGNO_MODE_OK (regno, mode)) | |
8998 | best_mode = mode; | |
0006469d | 8999 | |
b93a436e JL |
9000 | if (best_mode == VOIDmode) |
9001 | for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); | |
9002 | mode != VOIDmode; | |
9003 | mode = GET_MODE_WIDER_MODE (mode)) | |
9004 | if (HARD_REGNO_MODE_OK (regno, mode) | |
9005 | && (mov_optab->handlers[(int) mode].insn_code | |
9006 | != CODE_FOR_nothing)) | |
9007 | best_mode = mode; | |
0006469d | 9008 | |
b93a436e JL |
9009 | mode = best_mode; |
9010 | if (mode == VOIDmode) | |
9011 | abort (); | |
9012 | ||
9013 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
9014 | if (size % align != 0) | |
9015 | size = CEIL (size, align) * align; | |
9016 | size += GET_MODE_SIZE (mode); | |
9017 | apply_result_mode[regno] = mode; | |
9018 | } | |
9019 | else | |
9020 | apply_result_mode[regno] = VOIDmode; | |
9021 | ||
9022 | /* Allow targets that use untyped_call and untyped_return to override | |
9023 | the size so that machine-specific information can be stored here. */ | |
9024 | #ifdef APPLY_RESULT_SIZE | |
9025 | size = APPLY_RESULT_SIZE; | |
9026 | #endif | |
9027 | } | |
9028 | return size; | |
9029 | } | |
0006469d | 9030 | |
b93a436e JL |
9031 | #if defined (HAVE_untyped_call) || defined (HAVE_untyped_return) |
9032 | /* Create a vector describing the result block RESULT. If SAVEP is true, | |
9033 | the result block is used to save the values; otherwise it is used to | |
9034 | restore the values. */ | |
9035 | ||
9036 | static rtx | |
9037 | result_vector (savep, result) | |
9038 | int savep; | |
9039 | rtx result; | |
9040 | { | |
9041 | int regno, size, align, nelts; | |
9042 | enum machine_mode mode; | |
9043 | rtx reg, mem; | |
9044 | rtx *savevec = (rtx *) alloca (FIRST_PSEUDO_REGISTER * sizeof (rtx)); | |
9045 | ||
9046 | size = nelts = 0; | |
9047 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9048 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
9049 | { | |
9050 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
9051 | if (size % align != 0) | |
9052 | size = CEIL (size, align) * align; | |
9053 | reg = gen_rtx_REG (mode, savep ? regno : INCOMING_REGNO (regno)); | |
9054 | mem = change_address (result, mode, | |
9055 | plus_constant (XEXP (result, 0), size)); | |
9056 | savevec[nelts++] = (savep | |
9057 | ? gen_rtx_SET (VOIDmode, mem, reg) | |
9058 | : gen_rtx_SET (VOIDmode, reg, mem)); | |
9059 | size += GET_MODE_SIZE (mode); | |
ca695ac9 | 9060 | } |
b93a436e JL |
9061 | return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nelts, savevec)); |
9062 | } | |
9063 | #endif /* HAVE_untyped_call or HAVE_untyped_return */ | |
0006469d | 9064 | |
b93a436e JL |
9065 | /* Save the state required to perform an untyped call with the same |
9066 | arguments as were passed to the current function. */ | |
904762c8 | 9067 | |
b93a436e JL |
9068 | static rtx |
9069 | expand_builtin_apply_args () | |
9070 | { | |
9071 | rtx registers; | |
9072 | int size, align, regno; | |
9073 | enum machine_mode mode; | |
0006469d | 9074 | |
b93a436e JL |
9075 | /* Create a block where the arg-pointer, structure value address, |
9076 | and argument registers can be saved. */ | |
9077 | registers = assign_stack_local (BLKmode, apply_args_size (), -1); | |
0cb1d109 | 9078 | |
b93a436e JL |
9079 | /* Walk past the arg-pointer and structure value address. */ |
9080 | size = GET_MODE_SIZE (Pmode); | |
9081 | if (struct_value_rtx) | |
9082 | size += GET_MODE_SIZE (Pmode); | |
0cb1d109 | 9083 | |
b93a436e JL |
9084 | /* Save each register used in calling a function to the block. */ |
9085 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9086 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
9087 | { | |
9088 | rtx tem; | |
0cb1d109 | 9089 | |
b93a436e JL |
9090 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; |
9091 | if (size % align != 0) | |
9092 | size = CEIL (size, align) * align; | |
0006469d | 9093 | |
b93a436e | 9094 | tem = gen_rtx_REG (mode, INCOMING_REGNO (regno)); |
0e8c9172 | 9095 | |
b93a436e JL |
9096 | #ifdef STACK_REGS |
9097 | /* For reg-stack.c's stack register household. | |
9098 | Compare with a similar piece of code in function.c. */ | |
0006469d | 9099 | |
b93a436e JL |
9100 | emit_insn (gen_rtx_USE (mode, tem)); |
9101 | #endif | |
0e8c9172 | 9102 | |
b93a436e JL |
9103 | emit_move_insn (change_address (registers, mode, |
9104 | plus_constant (XEXP (registers, 0), | |
9105 | size)), | |
9106 | tem); | |
9107 | size += GET_MODE_SIZE (mode); | |
0e8c9172 | 9108 | } |
0006469d | 9109 | |
b93a436e JL |
9110 | /* Save the arg pointer to the block. */ |
9111 | emit_move_insn (change_address (registers, Pmode, XEXP (registers, 0)), | |
9112 | copy_to_reg (virtual_incoming_args_rtx)); | |
9113 | size = GET_MODE_SIZE (Pmode); | |
0006469d | 9114 | |
b93a436e JL |
9115 | /* Save the structure value address unless this is passed as an |
9116 | "invisible" first argument. */ | |
9117 | if (struct_value_incoming_rtx) | |
9118 | { | |
9119 | emit_move_insn (change_address (registers, Pmode, | |
9120 | plus_constant (XEXP (registers, 0), | |
9121 | size)), | |
9122 | copy_to_reg (struct_value_incoming_rtx)); | |
9123 | size += GET_MODE_SIZE (Pmode); | |
9124 | } | |
0006469d | 9125 | |
b93a436e JL |
9126 | /* Return the address of the block. */ |
9127 | return copy_addr_to_reg (XEXP (registers, 0)); | |
9128 | } | |
0006469d | 9129 | |
b93a436e JL |
9130 | /* Perform an untyped call and save the state required to perform an |
9131 | untyped return of whatever value was returned by the given function. */ | |
0006469d | 9132 | |
b93a436e JL |
9133 | static rtx |
9134 | expand_builtin_apply (function, arguments, argsize) | |
9135 | rtx function, arguments, argsize; | |
9136 | { | |
9137 | int size, align, regno; | |
9138 | enum machine_mode mode; | |
9139 | rtx incoming_args, result, reg, dest, call_insn; | |
9140 | rtx old_stack_level = 0; | |
9141 | rtx call_fusage = 0; | |
0006469d | 9142 | |
b93a436e JL |
9143 | /* Create a block where the return registers can be saved. */ |
9144 | result = assign_stack_local (BLKmode, apply_result_size (), -1); | |
9145 | ||
9146 | /* ??? The argsize value should be adjusted here. */ | |
9147 | ||
9148 | /* Fetch the arg pointer from the ARGUMENTS block. */ | |
9149 | incoming_args = gen_reg_rtx (Pmode); | |
9150 | emit_move_insn (incoming_args, | |
9151 | gen_rtx_MEM (Pmode, arguments)); | |
9152 | #ifndef STACK_GROWS_DOWNWARD | |
9153 | incoming_args = expand_binop (Pmode, sub_optab, incoming_args, argsize, | |
9154 | incoming_args, 0, OPTAB_LIB_WIDEN); | |
9155 | #endif | |
9156 | ||
9157 | /* Perform postincrements before actually calling the function. */ | |
ca695ac9 | 9158 | emit_queue (); |
0006469d | 9159 | |
b93a436e JL |
9160 | /* Push a new argument block and copy the arguments. */ |
9161 | do_pending_stack_adjust (); | |
0006469d | 9162 | |
b93a436e JL |
9163 | /* Save the stack with nonlocal if available */ |
9164 | #ifdef HAVE_save_stack_nonlocal | |
9165 | if (HAVE_save_stack_nonlocal) | |
9166 | emit_stack_save (SAVE_NONLOCAL, &old_stack_level, NULL_RTX); | |
9167 | else | |
9168 | #endif | |
9169 | emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX); | |
0006469d | 9170 | |
b93a436e JL |
9171 | /* Push a block of memory onto the stack to store the memory arguments. |
9172 | Save the address in a register, and copy the memory arguments. ??? I | |
9173 | haven't figured out how the calling convention macros effect this, | |
9174 | but it's likely that the source and/or destination addresses in | |
9175 | the block copy will need updating in machine specific ways. */ | |
9176 | dest = allocate_dynamic_stack_space (argsize, 0, 0); | |
9177 | emit_block_move (gen_rtx_MEM (BLKmode, dest), | |
9178 | gen_rtx_MEM (BLKmode, incoming_args), | |
9179 | argsize, | |
9180 | PARM_BOUNDARY / BITS_PER_UNIT); | |
9181 | ||
9182 | /* Refer to the argument block. */ | |
9183 | apply_args_size (); | |
9184 | arguments = gen_rtx_MEM (BLKmode, arguments); | |
9185 | ||
9186 | /* Walk past the arg-pointer and structure value address. */ | |
9187 | size = GET_MODE_SIZE (Pmode); | |
9188 | if (struct_value_rtx) | |
9189 | size += GET_MODE_SIZE (Pmode); | |
9190 | ||
9191 | /* Restore each of the registers previously saved. Make USE insns | |
9192 | for each of these registers for use in making the call. */ | |
9193 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9194 | if ((mode = apply_args_mode[regno]) != VOIDmode) | |
9195 | { | |
9196 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
9197 | if (size % align != 0) | |
9198 | size = CEIL (size, align) * align; | |
9199 | reg = gen_rtx_REG (mode, regno); | |
9200 | emit_move_insn (reg, | |
9201 | change_address (arguments, mode, | |
9202 | plus_constant (XEXP (arguments, 0), | |
9203 | size))); | |
9204 | ||
9205 | use_reg (&call_fusage, reg); | |
9206 | size += GET_MODE_SIZE (mode); | |
9207 | } | |
9208 | ||
9209 | /* Restore the structure value address unless this is passed as an | |
9210 | "invisible" first argument. */ | |
9211 | size = GET_MODE_SIZE (Pmode); | |
9212 | if (struct_value_rtx) | |
0006469d | 9213 | { |
b93a436e JL |
9214 | rtx value = gen_reg_rtx (Pmode); |
9215 | emit_move_insn (value, | |
9216 | change_address (arguments, Pmode, | |
9217 | plus_constant (XEXP (arguments, 0), | |
9218 | size))); | |
9219 | emit_move_insn (struct_value_rtx, value); | |
9220 | if (GET_CODE (struct_value_rtx) == REG) | |
9221 | use_reg (&call_fusage, struct_value_rtx); | |
9222 | size += GET_MODE_SIZE (Pmode); | |
ca695ac9 | 9223 | } |
0006469d | 9224 | |
b93a436e JL |
9225 | /* All arguments and registers used for the call are set up by now! */ |
9226 | function = prepare_call_address (function, NULL_TREE, &call_fusage, 0); | |
0006469d | 9227 | |
b93a436e JL |
9228 | /* Ensure address is valid. SYMBOL_REF is already valid, so no need, |
9229 | and we don't want to load it into a register as an optimization, | |
9230 | because prepare_call_address already did it if it should be done. */ | |
9231 | if (GET_CODE (function) != SYMBOL_REF) | |
9232 | function = memory_address (FUNCTION_MODE, function); | |
0006469d | 9233 | |
b93a436e JL |
9234 | /* Generate the actual call instruction and save the return value. */ |
9235 | #ifdef HAVE_untyped_call | |
9236 | if (HAVE_untyped_call) | |
9237 | emit_call_insn (gen_untyped_call (gen_rtx_MEM (FUNCTION_MODE, function), | |
9238 | result, result_vector (1, result))); | |
9239 | else | |
9240 | #endif | |
9241 | #ifdef HAVE_call_value | |
9242 | if (HAVE_call_value) | |
ca695ac9 | 9243 | { |
b93a436e | 9244 | rtx valreg = 0; |
0006469d | 9245 | |
b93a436e JL |
9246 | /* Locate the unique return register. It is not possible to |
9247 | express a call that sets more than one return register using | |
9248 | call_value; use untyped_call for that. In fact, untyped_call | |
9249 | only needs to save the return registers in the given block. */ | |
9250 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9251 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
9252 | { | |
9253 | if (valreg) | |
9254 | abort (); /* HAVE_untyped_call required. */ | |
9255 | valreg = gen_rtx_REG (mode, regno); | |
9256 | } | |
0006469d | 9257 | |
b93a436e JL |
9258 | emit_call_insn (gen_call_value (valreg, |
9259 | gen_rtx_MEM (FUNCTION_MODE, function), | |
9260 | const0_rtx, NULL_RTX, const0_rtx)); | |
0006469d | 9261 | |
b93a436e JL |
9262 | emit_move_insn (change_address (result, GET_MODE (valreg), |
9263 | XEXP (result, 0)), | |
9264 | valreg); | |
ca695ac9 | 9265 | } |
b93a436e JL |
9266 | else |
9267 | #endif | |
9268 | abort (); | |
0006469d | 9269 | |
b93a436e JL |
9270 | /* Find the CALL insn we just emitted. */ |
9271 | for (call_insn = get_last_insn (); | |
9272 | call_insn && GET_CODE (call_insn) != CALL_INSN; | |
9273 | call_insn = PREV_INSN (call_insn)) | |
9274 | ; | |
0006469d | 9275 | |
b93a436e JL |
9276 | if (! call_insn) |
9277 | abort (); | |
0006469d | 9278 | |
b93a436e JL |
9279 | /* Put the register usage information on the CALL. If there is already |
9280 | some usage information, put ours at the end. */ | |
9281 | if (CALL_INSN_FUNCTION_USAGE (call_insn)) | |
0006469d | 9282 | { |
b93a436e | 9283 | rtx link; |
0006469d | 9284 | |
b93a436e JL |
9285 | for (link = CALL_INSN_FUNCTION_USAGE (call_insn); XEXP (link, 1) != 0; |
9286 | link = XEXP (link, 1)) | |
9287 | ; | |
9288 | ||
9289 | XEXP (link, 1) = call_fusage; | |
ca695ac9 | 9290 | } |
b93a436e JL |
9291 | else |
9292 | CALL_INSN_FUNCTION_USAGE (call_insn) = call_fusage; | |
0006469d | 9293 | |
b93a436e JL |
9294 | /* Restore the stack. */ |
9295 | #ifdef HAVE_save_stack_nonlocal | |
9296 | if (HAVE_save_stack_nonlocal) | |
9297 | emit_stack_restore (SAVE_NONLOCAL, old_stack_level, NULL_RTX); | |
9298 | else | |
9299 | #endif | |
9300 | emit_stack_restore (SAVE_BLOCK, old_stack_level, NULL_RTX); | |
9301 | ||
9302 | /* Return the address of the result block. */ | |
9303 | return copy_addr_to_reg (XEXP (result, 0)); | |
0006469d | 9304 | } |
bbf6f052 | 9305 | |
b93a436e | 9306 | /* Perform an untyped return. */ |
ca695ac9 JB |
9307 | |
9308 | static void | |
b93a436e JL |
9309 | expand_builtin_return (result) |
9310 | rtx result; | |
bbf6f052 | 9311 | { |
b93a436e JL |
9312 | int size, align, regno; |
9313 | enum machine_mode mode; | |
9314 | rtx reg; | |
9315 | rtx call_fusage = 0; | |
bbf6f052 | 9316 | |
b93a436e JL |
9317 | apply_result_size (); |
9318 | result = gen_rtx_MEM (BLKmode, result); | |
bbf6f052 | 9319 | |
b93a436e JL |
9320 | #ifdef HAVE_untyped_return |
9321 | if (HAVE_untyped_return) | |
ca695ac9 | 9322 | { |
b93a436e JL |
9323 | emit_jump_insn (gen_untyped_return (result, result_vector (0, result))); |
9324 | emit_barrier (); | |
9325 | return; | |
ca695ac9 | 9326 | } |
b93a436e | 9327 | #endif |
1499e0a8 | 9328 | |
b93a436e JL |
9329 | /* Restore the return value and note that each value is used. */ |
9330 | size = 0; | |
9331 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
9332 | if ((mode = apply_result_mode[regno]) != VOIDmode) | |
9333 | { | |
9334 | align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT; | |
9335 | if (size % align != 0) | |
9336 | size = CEIL (size, align) * align; | |
9337 | reg = gen_rtx_REG (mode, INCOMING_REGNO (regno)); | |
9338 | emit_move_insn (reg, | |
9339 | change_address (result, mode, | |
9340 | plus_constant (XEXP (result, 0), | |
9341 | size))); | |
9342 | ||
9343 | push_to_sequence (call_fusage); | |
9344 | emit_insn (gen_rtx_USE (VOIDmode, reg)); | |
9345 | call_fusage = get_insns (); | |
9346 | end_sequence (); | |
9347 | size += GET_MODE_SIZE (mode); | |
9348 | } | |
9349 | ||
9350 | /* Put the USE insns before the return. */ | |
9351 | emit_insns (call_fusage); | |
9352 | ||
9353 | /* Return whatever values was restored by jumping directly to the end | |
9354 | of the function. */ | |
9355 | expand_null_return (); | |
ca695ac9 JB |
9356 | } |
9357 | \f | |
b93a436e JL |
9358 | /* Expand code for a post- or pre- increment or decrement |
9359 | and return the RTX for the result. | |
9360 | POST is 1 for postinc/decrements and 0 for preinc/decrements. */ | |
1499e0a8 | 9361 | |
b93a436e JL |
9362 | static rtx |
9363 | expand_increment (exp, post, ignore) | |
9364 | register tree exp; | |
9365 | int post, ignore; | |
ca695ac9 | 9366 | { |
b93a436e JL |
9367 | register rtx op0, op1; |
9368 | register rtx temp, value; | |
9369 | register tree incremented = TREE_OPERAND (exp, 0); | |
9370 | optab this_optab = add_optab; | |
9371 | int icode; | |
9372 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); | |
9373 | int op0_is_copy = 0; | |
9374 | int single_insn = 0; | |
9375 | /* 1 means we can't store into OP0 directly, | |
9376 | because it is a subreg narrower than a word, | |
9377 | and we don't dare clobber the rest of the word. */ | |
9378 | int bad_subreg = 0; | |
1499e0a8 | 9379 | |
b93a436e JL |
9380 | /* Stabilize any component ref that might need to be |
9381 | evaluated more than once below. */ | |
9382 | if (!post | |
9383 | || TREE_CODE (incremented) == BIT_FIELD_REF | |
9384 | || (TREE_CODE (incremented) == COMPONENT_REF | |
9385 | && (TREE_CODE (TREE_OPERAND (incremented, 0)) != INDIRECT_REF | |
9386 | || DECL_BIT_FIELD (TREE_OPERAND (incremented, 1))))) | |
9387 | incremented = stabilize_reference (incremented); | |
9388 | /* Nested *INCREMENT_EXPRs can happen in C++. We must force innermost | |
9389 | ones into save exprs so that they don't accidentally get evaluated | |
9390 | more than once by the code below. */ | |
9391 | if (TREE_CODE (incremented) == PREINCREMENT_EXPR | |
9392 | || TREE_CODE (incremented) == PREDECREMENT_EXPR) | |
9393 | incremented = save_expr (incremented); | |
e9a25f70 | 9394 | |
b93a436e JL |
9395 | /* Compute the operands as RTX. |
9396 | Note whether OP0 is the actual lvalue or a copy of it: | |
9397 | I believe it is a copy iff it is a register or subreg | |
9398 | and insns were generated in computing it. */ | |
e9a25f70 | 9399 | |
b93a436e JL |
9400 | temp = get_last_insn (); |
9401 | op0 = expand_expr (incremented, NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_RW); | |
e9a25f70 | 9402 | |
b93a436e JL |
9403 | /* If OP0 is a SUBREG made for a promoted variable, we cannot increment |
9404 | in place but instead must do sign- or zero-extension during assignment, | |
9405 | so we copy it into a new register and let the code below use it as | |
9406 | a copy. | |
e9a25f70 | 9407 | |
b93a436e JL |
9408 | Note that we can safely modify this SUBREG since it is know not to be |
9409 | shared (it was made by the expand_expr call above). */ | |
9410 | ||
9411 | if (GET_CODE (op0) == SUBREG && SUBREG_PROMOTED_VAR_P (op0)) | |
9412 | { | |
9413 | if (post) | |
9414 | SUBREG_REG (op0) = copy_to_reg (SUBREG_REG (op0)); | |
9415 | else | |
9416 | bad_subreg = 1; | |
9417 | } | |
9418 | else if (GET_CODE (op0) == SUBREG | |
9419 | && GET_MODE_BITSIZE (GET_MODE (op0)) < BITS_PER_WORD) | |
9420 | { | |
9421 | /* We cannot increment this SUBREG in place. If we are | |
9422 | post-incrementing, get a copy of the old value. Otherwise, | |
9423 | just mark that we cannot increment in place. */ | |
9424 | if (post) | |
9425 | op0 = copy_to_reg (op0); | |
9426 | else | |
9427 | bad_subreg = 1; | |
e9a25f70 JL |
9428 | } |
9429 | ||
b93a436e JL |
9430 | op0_is_copy = ((GET_CODE (op0) == SUBREG || GET_CODE (op0) == REG) |
9431 | && temp != get_last_insn ()); | |
9432 | op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, | |
9433 | EXPAND_MEMORY_USE_BAD); | |
1499e0a8 | 9434 | |
b93a436e JL |
9435 | /* Decide whether incrementing or decrementing. */ |
9436 | if (TREE_CODE (exp) == POSTDECREMENT_EXPR | |
9437 | || TREE_CODE (exp) == PREDECREMENT_EXPR) | |
9438 | this_optab = sub_optab; | |
9439 | ||
9440 | /* Convert decrement by a constant into a negative increment. */ | |
9441 | if (this_optab == sub_optab | |
9442 | && GET_CODE (op1) == CONST_INT) | |
ca695ac9 | 9443 | { |
b93a436e JL |
9444 | op1 = GEN_INT (- INTVAL (op1)); |
9445 | this_optab = add_optab; | |
ca695ac9 | 9446 | } |
1499e0a8 | 9447 | |
b93a436e JL |
9448 | /* For a preincrement, see if we can do this with a single instruction. */ |
9449 | if (!post) | |
9450 | { | |
9451 | icode = (int) this_optab->handlers[(int) mode].insn_code; | |
9452 | if (icode != (int) CODE_FOR_nothing | |
9453 | /* Make sure that OP0 is valid for operands 0 and 1 | |
9454 | of the insn we want to queue. */ | |
9455 | && (*insn_operand_predicate[icode][0]) (op0, mode) | |
9456 | && (*insn_operand_predicate[icode][1]) (op0, mode) | |
9457 | && (*insn_operand_predicate[icode][2]) (op1, mode)) | |
9458 | single_insn = 1; | |
9459 | } | |
bbf6f052 | 9460 | |
b93a436e JL |
9461 | /* If OP0 is not the actual lvalue, but rather a copy in a register, |
9462 | then we cannot just increment OP0. We must therefore contrive to | |
9463 | increment the original value. Then, for postincrement, we can return | |
9464 | OP0 since it is a copy of the old value. For preincrement, expand here | |
9465 | unless we can do it with a single insn. | |
bbf6f052 | 9466 | |
b93a436e JL |
9467 | Likewise if storing directly into OP0 would clobber high bits |
9468 | we need to preserve (bad_subreg). */ | |
9469 | if (op0_is_copy || (!post && !single_insn) || bad_subreg) | |
a358cee0 | 9470 | { |
b93a436e JL |
9471 | /* This is the easiest way to increment the value wherever it is. |
9472 | Problems with multiple evaluation of INCREMENTED are prevented | |
9473 | because either (1) it is a component_ref or preincrement, | |
9474 | in which case it was stabilized above, or (2) it is an array_ref | |
9475 | with constant index in an array in a register, which is | |
9476 | safe to reevaluate. */ | |
9477 | tree newexp = build (((TREE_CODE (exp) == POSTDECREMENT_EXPR | |
9478 | || TREE_CODE (exp) == PREDECREMENT_EXPR) | |
9479 | ? MINUS_EXPR : PLUS_EXPR), | |
9480 | TREE_TYPE (exp), | |
9481 | incremented, | |
9482 | TREE_OPERAND (exp, 1)); | |
a358cee0 | 9483 | |
b93a436e JL |
9484 | while (TREE_CODE (incremented) == NOP_EXPR |
9485 | || TREE_CODE (incremented) == CONVERT_EXPR) | |
9486 | { | |
9487 | newexp = convert (TREE_TYPE (incremented), newexp); | |
9488 | incremented = TREE_OPERAND (incremented, 0); | |
9489 | } | |
bbf6f052 | 9490 | |
b93a436e JL |
9491 | temp = expand_assignment (incremented, newexp, ! post && ! ignore , 0); |
9492 | return post ? op0 : temp; | |
9493 | } | |
bbf6f052 | 9494 | |
b93a436e JL |
9495 | if (post) |
9496 | { | |
9497 | /* We have a true reference to the value in OP0. | |
9498 | If there is an insn to add or subtract in this mode, queue it. | |
9499 | Queueing the increment insn avoids the register shuffling | |
9500 | that often results if we must increment now and first save | |
9501 | the old value for subsequent use. */ | |
bbf6f052 | 9502 | |
b93a436e JL |
9503 | #if 0 /* Turned off to avoid making extra insn for indexed memref. */ |
9504 | op0 = stabilize (op0); | |
9505 | #endif | |
41dfd40c | 9506 | |
b93a436e JL |
9507 | icode = (int) this_optab->handlers[(int) mode].insn_code; |
9508 | if (icode != (int) CODE_FOR_nothing | |
9509 | /* Make sure that OP0 is valid for operands 0 and 1 | |
9510 | of the insn we want to queue. */ | |
9511 | && (*insn_operand_predicate[icode][0]) (op0, mode) | |
9512 | && (*insn_operand_predicate[icode][1]) (op0, mode)) | |
9513 | { | |
9514 | if (! (*insn_operand_predicate[icode][2]) (op1, mode)) | |
9515 | op1 = force_reg (mode, op1); | |
bbf6f052 | 9516 | |
b93a436e JL |
9517 | return enqueue_insn (op0, GEN_FCN (icode) (op0, op0, op1)); |
9518 | } | |
9519 | if (icode != (int) CODE_FOR_nothing && GET_CODE (op0) == MEM) | |
9520 | { | |
9521 | rtx addr = (general_operand (XEXP (op0, 0), mode) | |
9522 | ? force_reg (Pmode, XEXP (op0, 0)) | |
9523 | : copy_to_reg (XEXP (op0, 0))); | |
9524 | rtx temp, result; | |
ca695ac9 | 9525 | |
b93a436e JL |
9526 | op0 = change_address (op0, VOIDmode, addr); |
9527 | temp = force_reg (GET_MODE (op0), op0); | |
9528 | if (! (*insn_operand_predicate[icode][2]) (op1, mode)) | |
9529 | op1 = force_reg (mode, op1); | |
ca695ac9 | 9530 | |
b93a436e JL |
9531 | /* The increment queue is LIFO, thus we have to `queue' |
9532 | the instructions in reverse order. */ | |
9533 | enqueue_insn (op0, gen_move_insn (op0, temp)); | |
9534 | result = enqueue_insn (temp, GEN_FCN (icode) (temp, temp, op1)); | |
9535 | return result; | |
bbf6f052 RK |
9536 | } |
9537 | } | |
ca695ac9 | 9538 | |
b93a436e JL |
9539 | /* Preincrement, or we can't increment with one simple insn. */ |
9540 | if (post) | |
9541 | /* Save a copy of the value before inc or dec, to return it later. */ | |
9542 | temp = value = copy_to_reg (op0); | |
9543 | else | |
9544 | /* Arrange to return the incremented value. */ | |
9545 | /* Copy the rtx because expand_binop will protect from the queue, | |
9546 | and the results of that would be invalid for us to return | |
9547 | if our caller does emit_queue before using our result. */ | |
9548 | temp = copy_rtx (value = op0); | |
bbf6f052 | 9549 | |
b93a436e JL |
9550 | /* Increment however we can. */ |
9551 | op1 = expand_binop (mode, this_optab, value, op1, | |
9552 | flag_check_memory_usage ? NULL_RTX : op0, | |
9553 | TREE_UNSIGNED (TREE_TYPE (exp)), OPTAB_LIB_WIDEN); | |
9554 | /* Make sure the value is stored into OP0. */ | |
9555 | if (op1 != op0) | |
9556 | emit_move_insn (op0, op1); | |
5718612f | 9557 | |
b93a436e JL |
9558 | return temp; |
9559 | } | |
9560 | \f | |
9561 | /* Expand all function calls contained within EXP, innermost ones first. | |
9562 | But don't look within expressions that have sequence points. | |
9563 | For each CALL_EXPR, record the rtx for its value | |
9564 | in the CALL_EXPR_RTL field. */ | |
5718612f | 9565 | |
b93a436e JL |
9566 | static void |
9567 | preexpand_calls (exp) | |
9568 | tree exp; | |
9569 | { | |
9570 | register int nops, i; | |
9571 | int type = TREE_CODE_CLASS (TREE_CODE (exp)); | |
5718612f | 9572 | |
b93a436e JL |
9573 | if (! do_preexpand_calls) |
9574 | return; | |
5718612f | 9575 | |
b93a436e | 9576 | /* Only expressions and references can contain calls. */ |
bbf6f052 | 9577 | |
b93a436e JL |
9578 | if (type != 'e' && type != '<' && type != '1' && type != '2' && type != 'r') |
9579 | return; | |
bbf6f052 | 9580 | |
b93a436e JL |
9581 | switch (TREE_CODE (exp)) |
9582 | { | |
9583 | case CALL_EXPR: | |
9584 | /* Do nothing if already expanded. */ | |
9585 | if (CALL_EXPR_RTL (exp) != 0 | |
9586 | /* Do nothing if the call returns a variable-sized object. */ | |
9587 | || TREE_CODE (TYPE_SIZE (TREE_TYPE(exp))) != INTEGER_CST | |
9588 | /* Do nothing to built-in functions. */ | |
9589 | || (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR | |
9590 | && (TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)) | |
9591 | == FUNCTION_DECL) | |
9592 | && DECL_BUILT_IN (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)))) | |
9593 | return; | |
bbf6f052 | 9594 | |
b93a436e JL |
9595 | CALL_EXPR_RTL (exp) = expand_call (exp, NULL_RTX, 0); |
9596 | return; | |
bbf6f052 | 9597 | |
b93a436e JL |
9598 | case COMPOUND_EXPR: |
9599 | case COND_EXPR: | |
9600 | case TRUTH_ANDIF_EXPR: | |
9601 | case TRUTH_ORIF_EXPR: | |
9602 | /* If we find one of these, then we can be sure | |
9603 | the adjust will be done for it (since it makes jumps). | |
9604 | Do it now, so that if this is inside an argument | |
9605 | of a function, we don't get the stack adjustment | |
9606 | after some other args have already been pushed. */ | |
9607 | do_pending_stack_adjust (); | |
9608 | return; | |
bbf6f052 | 9609 | |
b93a436e JL |
9610 | case BLOCK: |
9611 | case RTL_EXPR: | |
9612 | case WITH_CLEANUP_EXPR: | |
9613 | case CLEANUP_POINT_EXPR: | |
9614 | case TRY_CATCH_EXPR: | |
9615 | return; | |
bbf6f052 | 9616 | |
b93a436e JL |
9617 | case SAVE_EXPR: |
9618 | if (SAVE_EXPR_RTL (exp) != 0) | |
9619 | return; | |
9620 | ||
9621 | default: | |
9622 | break; | |
ca695ac9 | 9623 | } |
bbf6f052 | 9624 | |
b93a436e JL |
9625 | nops = tree_code_length[(int) TREE_CODE (exp)]; |
9626 | for (i = 0; i < nops; i++) | |
9627 | if (TREE_OPERAND (exp, i) != 0) | |
9628 | { | |
9629 | type = TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, i))); | |
9630 | if (type == 'e' || type == '<' || type == '1' || type == '2' | |
9631 | || type == 'r') | |
9632 | preexpand_calls (TREE_OPERAND (exp, i)); | |
9633 | } | |
9634 | } | |
9635 | \f | |
9636 | /* At the start of a function, record that we have no previously-pushed | |
9637 | arguments waiting to be popped. */ | |
bbf6f052 | 9638 | |
b93a436e JL |
9639 | void |
9640 | init_pending_stack_adjust () | |
9641 | { | |
9642 | pending_stack_adjust = 0; | |
9643 | } | |
bbf6f052 | 9644 | |
b93a436e | 9645 | /* When exiting from function, if safe, clear out any pending stack adjust |
060fbabf JL |
9646 | so the adjustment won't get done. |
9647 | ||
9648 | Note, if the current function calls alloca, then it must have a | |
9649 | frame pointer regardless of the value of flag_omit_frame_pointer. */ | |
bbf6f052 | 9650 | |
b93a436e JL |
9651 | void |
9652 | clear_pending_stack_adjust () | |
9653 | { | |
9654 | #ifdef EXIT_IGNORE_STACK | |
9655 | if (optimize > 0 | |
060fbabf JL |
9656 | && (! flag_omit_frame_pointer || current_function_calls_alloca) |
9657 | && EXIT_IGNORE_STACK | |
b93a436e JL |
9658 | && ! (DECL_INLINE (current_function_decl) && ! flag_no_inline) |
9659 | && ! flag_inline_functions) | |
9660 | pending_stack_adjust = 0; | |
9661 | #endif | |
9662 | } | |
bbf6f052 | 9663 | |
b93a436e JL |
9664 | /* Pop any previously-pushed arguments that have not been popped yet. */ |
9665 | ||
9666 | void | |
9667 | do_pending_stack_adjust () | |
9668 | { | |
9669 | if (inhibit_defer_pop == 0) | |
ca695ac9 | 9670 | { |
b93a436e JL |
9671 | if (pending_stack_adjust != 0) |
9672 | adjust_stack (GEN_INT (pending_stack_adjust)); | |
9673 | pending_stack_adjust = 0; | |
bbf6f052 | 9674 | } |
bbf6f052 RK |
9675 | } |
9676 | \f | |
b93a436e | 9677 | /* Expand conditional expressions. */ |
bbf6f052 | 9678 | |
b93a436e JL |
9679 | /* Generate code to evaluate EXP and jump to LABEL if the value is zero. |
9680 | LABEL is an rtx of code CODE_LABEL, in this function and all the | |
9681 | functions here. */ | |
bbf6f052 | 9682 | |
b93a436e JL |
9683 | void |
9684 | jumpifnot (exp, label) | |
ca695ac9 | 9685 | tree exp; |
b93a436e | 9686 | rtx label; |
bbf6f052 | 9687 | { |
b93a436e JL |
9688 | do_jump (exp, label, NULL_RTX); |
9689 | } | |
bbf6f052 | 9690 | |
b93a436e | 9691 | /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */ |
ca695ac9 | 9692 | |
b93a436e JL |
9693 | void |
9694 | jumpif (exp, label) | |
9695 | tree exp; | |
9696 | rtx label; | |
9697 | { | |
9698 | do_jump (exp, NULL_RTX, label); | |
9699 | } | |
ca695ac9 | 9700 | |
b93a436e JL |
9701 | /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if |
9702 | the result is zero, or IF_TRUE_LABEL if the result is one. | |
9703 | Either of IF_FALSE_LABEL and IF_TRUE_LABEL may be zero, | |
9704 | meaning fall through in that case. | |
ca695ac9 | 9705 | |
b93a436e JL |
9706 | do_jump always does any pending stack adjust except when it does not |
9707 | actually perform a jump. An example where there is no jump | |
9708 | is when EXP is `(foo (), 0)' and IF_FALSE_LABEL is null. | |
ca695ac9 | 9709 | |
b93a436e JL |
9710 | This function is responsible for optimizing cases such as |
9711 | &&, || and comparison operators in EXP. */ | |
5718612f | 9712 | |
b93a436e JL |
9713 | void |
9714 | do_jump (exp, if_false_label, if_true_label) | |
9715 | tree exp; | |
9716 | rtx if_false_label, if_true_label; | |
9717 | { | |
9718 | register enum tree_code code = TREE_CODE (exp); | |
9719 | /* Some cases need to create a label to jump to | |
9720 | in order to properly fall through. | |
9721 | These cases set DROP_THROUGH_LABEL nonzero. */ | |
9722 | rtx drop_through_label = 0; | |
9723 | rtx temp; | |
9724 | rtx comparison = 0; | |
9725 | int i; | |
9726 | tree type; | |
9727 | enum machine_mode mode; | |
ca695ac9 | 9728 | |
b93a436e | 9729 | emit_queue (); |
ca695ac9 | 9730 | |
b93a436e | 9731 | switch (code) |
ca695ac9 | 9732 | { |
b93a436e | 9733 | case ERROR_MARK: |
ca695ac9 | 9734 | break; |
bbf6f052 | 9735 | |
b93a436e JL |
9736 | case INTEGER_CST: |
9737 | temp = integer_zerop (exp) ? if_false_label : if_true_label; | |
9738 | if (temp) | |
9739 | emit_jump (temp); | |
9740 | break; | |
bbf6f052 | 9741 | |
b93a436e JL |
9742 | #if 0 |
9743 | /* This is not true with #pragma weak */ | |
9744 | case ADDR_EXPR: | |
9745 | /* The address of something can never be zero. */ | |
9746 | if (if_true_label) | |
9747 | emit_jump (if_true_label); | |
9748 | break; | |
9749 | #endif | |
bbf6f052 | 9750 | |
b93a436e JL |
9751 | case NOP_EXPR: |
9752 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == COMPONENT_REF | |
9753 | || TREE_CODE (TREE_OPERAND (exp, 0)) == BIT_FIELD_REF | |
9754 | || TREE_CODE (TREE_OPERAND (exp, 0)) == ARRAY_REF) | |
9755 | goto normal; | |
9756 | case CONVERT_EXPR: | |
9757 | /* If we are narrowing the operand, we have to do the compare in the | |
9758 | narrower mode. */ | |
9759 | if ((TYPE_PRECISION (TREE_TYPE (exp)) | |
9760 | < TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
9761 | goto normal; | |
9762 | case NON_LVALUE_EXPR: | |
9763 | case REFERENCE_EXPR: | |
9764 | case ABS_EXPR: | |
9765 | case NEGATE_EXPR: | |
9766 | case LROTATE_EXPR: | |
9767 | case RROTATE_EXPR: | |
9768 | /* These cannot change zero->non-zero or vice versa. */ | |
9769 | do_jump (TREE_OPERAND (exp, 0), if_false_label, if_true_label); | |
9770 | break; | |
bbf6f052 | 9771 | |
b93a436e JL |
9772 | #if 0 |
9773 | /* This is never less insns than evaluating the PLUS_EXPR followed by | |
9774 | a test and can be longer if the test is eliminated. */ | |
9775 | case PLUS_EXPR: | |
9776 | /* Reduce to minus. */ | |
9777 | exp = build (MINUS_EXPR, TREE_TYPE (exp), | |
9778 | TREE_OPERAND (exp, 0), | |
9779 | fold (build1 (NEGATE_EXPR, TREE_TYPE (TREE_OPERAND (exp, 1)), | |
9780 | TREE_OPERAND (exp, 1)))); | |
9781 | /* Process as MINUS. */ | |
ca695ac9 | 9782 | #endif |
bbf6f052 | 9783 | |
b93a436e JL |
9784 | case MINUS_EXPR: |
9785 | /* Non-zero iff operands of minus differ. */ | |
9786 | comparison = compare (build (NE_EXPR, TREE_TYPE (exp), | |
9787 | TREE_OPERAND (exp, 0), | |
9788 | TREE_OPERAND (exp, 1)), | |
9789 | NE, NE); | |
9790 | break; | |
bbf6f052 | 9791 | |
b93a436e JL |
9792 | case BIT_AND_EXPR: |
9793 | /* If we are AND'ing with a small constant, do this comparison in the | |
9794 | smallest type that fits. If the machine doesn't have comparisons | |
9795 | that small, it will be converted back to the wider comparison. | |
9796 | This helps if we are testing the sign bit of a narrower object. | |
9797 | combine can't do this for us because it can't know whether a | |
9798 | ZERO_EXTRACT or a compare in a smaller mode exists, but we do. */ | |
bbf6f052 | 9799 | |
b93a436e JL |
9800 | if (! SLOW_BYTE_ACCESS |
9801 | && TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST | |
9802 | && TYPE_PRECISION (TREE_TYPE (exp)) <= HOST_BITS_PER_WIDE_INT | |
9803 | && (i = floor_log2 (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)))) >= 0 | |
9804 | && (mode = mode_for_size (i + 1, MODE_INT, 0)) != BLKmode | |
9805 | && (type = type_for_mode (mode, 1)) != 0 | |
9806 | && TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp)) | |
9807 | && (cmp_optab->handlers[(int) TYPE_MODE (type)].insn_code | |
9808 | != CODE_FOR_nothing)) | |
9809 | { | |
9810 | do_jump (convert (type, exp), if_false_label, if_true_label); | |
9811 | break; | |
9812 | } | |
9813 | goto normal; | |
bbf6f052 | 9814 | |
b93a436e JL |
9815 | case TRUTH_NOT_EXPR: |
9816 | do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label); | |
9817 | break; | |
bbf6f052 | 9818 | |
b93a436e JL |
9819 | case TRUTH_ANDIF_EXPR: |
9820 | if (if_false_label == 0) | |
9821 | if_false_label = drop_through_label = gen_label_rtx (); | |
9822 | do_jump (TREE_OPERAND (exp, 0), if_false_label, NULL_RTX); | |
9823 | start_cleanup_deferral (); | |
9824 | do_jump (TREE_OPERAND (exp, 1), if_false_label, if_true_label); | |
9825 | end_cleanup_deferral (); | |
9826 | break; | |
bbf6f052 | 9827 | |
b93a436e JL |
9828 | case TRUTH_ORIF_EXPR: |
9829 | if (if_true_label == 0) | |
9830 | if_true_label = drop_through_label = gen_label_rtx (); | |
9831 | do_jump (TREE_OPERAND (exp, 0), NULL_RTX, if_true_label); | |
9832 | start_cleanup_deferral (); | |
9833 | do_jump (TREE_OPERAND (exp, 1), if_false_label, if_true_label); | |
9834 | end_cleanup_deferral (); | |
9835 | break; | |
bbf6f052 | 9836 | |
b93a436e JL |
9837 | case COMPOUND_EXPR: |
9838 | push_temp_slots (); | |
9839 | expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, 0); | |
9840 | preserve_temp_slots (NULL_RTX); | |
9841 | free_temp_slots (); | |
9842 | pop_temp_slots (); | |
9843 | emit_queue (); | |
9844 | do_pending_stack_adjust (); | |
9845 | do_jump (TREE_OPERAND (exp, 1), if_false_label, if_true_label); | |
9846 | break; | |
bbf6f052 | 9847 | |
b93a436e JL |
9848 | case COMPONENT_REF: |
9849 | case BIT_FIELD_REF: | |
9850 | case ARRAY_REF: | |
9851 | { | |
9852 | int bitsize, bitpos, unsignedp; | |
9853 | enum machine_mode mode; | |
9854 | tree type; | |
9855 | tree offset; | |
9856 | int volatilep = 0; | |
9857 | int alignment; | |
bbf6f052 | 9858 | |
b93a436e JL |
9859 | /* Get description of this reference. We don't actually care |
9860 | about the underlying object here. */ | |
9861 | get_inner_reference (exp, &bitsize, &bitpos, &offset, | |
9862 | &mode, &unsignedp, &volatilep, | |
9863 | &alignment); | |
bbf6f052 | 9864 | |
b93a436e JL |
9865 | type = type_for_size (bitsize, unsignedp); |
9866 | if (! SLOW_BYTE_ACCESS | |
9867 | && type != 0 && bitsize >= 0 | |
9868 | && TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp)) | |
9869 | && (cmp_optab->handlers[(int) TYPE_MODE (type)].insn_code | |
9870 | != CODE_FOR_nothing)) | |
9871 | { | |
9872 | do_jump (convert (type, exp), if_false_label, if_true_label); | |
9873 | break; | |
9874 | } | |
9875 | goto normal; | |
9876 | } | |
bbf6f052 | 9877 | |
b93a436e JL |
9878 | case COND_EXPR: |
9879 | /* Do (a ? 1 : 0) and (a ? 0 : 1) as special cases. */ | |
9880 | if (integer_onep (TREE_OPERAND (exp, 1)) | |
9881 | && integer_zerop (TREE_OPERAND (exp, 2))) | |
9882 | do_jump (TREE_OPERAND (exp, 0), if_false_label, if_true_label); | |
bbf6f052 | 9883 | |
b93a436e JL |
9884 | else if (integer_zerop (TREE_OPERAND (exp, 1)) |
9885 | && integer_onep (TREE_OPERAND (exp, 2))) | |
9886 | do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label); | |
bbf6f052 | 9887 | |
b93a436e JL |
9888 | else |
9889 | { | |
9890 | register rtx label1 = gen_label_rtx (); | |
9891 | drop_through_label = gen_label_rtx (); | |
bbf6f052 | 9892 | |
b93a436e | 9893 | do_jump (TREE_OPERAND (exp, 0), label1, NULL_RTX); |
bbf6f052 | 9894 | |
b93a436e JL |
9895 | start_cleanup_deferral (); |
9896 | /* Now the THEN-expression. */ | |
9897 | do_jump (TREE_OPERAND (exp, 1), | |
9898 | if_false_label ? if_false_label : drop_through_label, | |
9899 | if_true_label ? if_true_label : drop_through_label); | |
9900 | /* In case the do_jump just above never jumps. */ | |
9901 | do_pending_stack_adjust (); | |
9902 | emit_label (label1); | |
bbf6f052 | 9903 | |
b93a436e JL |
9904 | /* Now the ELSE-expression. */ |
9905 | do_jump (TREE_OPERAND (exp, 2), | |
9906 | if_false_label ? if_false_label : drop_through_label, | |
9907 | if_true_label ? if_true_label : drop_through_label); | |
9908 | end_cleanup_deferral (); | |
9909 | } | |
9910 | break; | |
bbf6f052 | 9911 | |
b93a436e JL |
9912 | case EQ_EXPR: |
9913 | { | |
9914 | tree inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
bbf6f052 | 9915 | |
b93a436e JL |
9916 | if (integer_zerop (TREE_OPERAND (exp, 1))) |
9917 | do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label); | |
9918 | else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_COMPLEX_FLOAT | |
9919 | || GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_COMPLEX_INT) | |
9920 | do_jump | |
9921 | (fold | |
9922 | (build (TRUTH_ANDIF_EXPR, TREE_TYPE (exp), | |
9923 | fold (build (EQ_EXPR, TREE_TYPE (exp), | |
9924 | fold (build1 (REALPART_EXPR, | |
9925 | TREE_TYPE (inner_type), | |
9926 | TREE_OPERAND (exp, 0))), | |
9927 | fold (build1 (REALPART_EXPR, | |
9928 | TREE_TYPE (inner_type), | |
9929 | TREE_OPERAND (exp, 1))))), | |
9930 | fold (build (EQ_EXPR, TREE_TYPE (exp), | |
9931 | fold (build1 (IMAGPART_EXPR, | |
9932 | TREE_TYPE (inner_type), | |
9933 | TREE_OPERAND (exp, 0))), | |
9934 | fold (build1 (IMAGPART_EXPR, | |
9935 | TREE_TYPE (inner_type), | |
9936 | TREE_OPERAND (exp, 1))))))), | |
9937 | if_false_label, if_true_label); | |
9938 | else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_INT | |
9939 | && !can_compare_p (TYPE_MODE (inner_type))) | |
9940 | do_jump_by_parts_equality (exp, if_false_label, if_true_label); | |
9941 | else | |
9942 | comparison = compare (exp, EQ, EQ); | |
9943 | break; | |
9944 | } | |
bbf6f052 | 9945 | |
b93a436e JL |
9946 | case NE_EXPR: |
9947 | { | |
9948 | tree inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
bbf6f052 | 9949 | |
b93a436e JL |
9950 | if (integer_zerop (TREE_OPERAND (exp, 1))) |
9951 | do_jump (TREE_OPERAND (exp, 0), if_false_label, if_true_label); | |
9952 | else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_COMPLEX_FLOAT | |
9953 | || GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_COMPLEX_INT) | |
9954 | do_jump | |
9955 | (fold | |
9956 | (build (TRUTH_ORIF_EXPR, TREE_TYPE (exp), | |
9957 | fold (build (NE_EXPR, TREE_TYPE (exp), | |
9958 | fold (build1 (REALPART_EXPR, | |
9959 | TREE_TYPE (inner_type), | |
9960 | TREE_OPERAND (exp, 0))), | |
9961 | fold (build1 (REALPART_EXPR, | |
9962 | TREE_TYPE (inner_type), | |
9963 | TREE_OPERAND (exp, 1))))), | |
9964 | fold (build (NE_EXPR, TREE_TYPE (exp), | |
9965 | fold (build1 (IMAGPART_EXPR, | |
9966 | TREE_TYPE (inner_type), | |
9967 | TREE_OPERAND (exp, 0))), | |
9968 | fold (build1 (IMAGPART_EXPR, | |
9969 | TREE_TYPE (inner_type), | |
9970 | TREE_OPERAND (exp, 1))))))), | |
9971 | if_false_label, if_true_label); | |
9972 | else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_INT | |
9973 | && !can_compare_p (TYPE_MODE (inner_type))) | |
9974 | do_jump_by_parts_equality (exp, if_true_label, if_false_label); | |
9975 | else | |
9976 | comparison = compare (exp, NE, NE); | |
9977 | break; | |
9978 | } | |
bbf6f052 | 9979 | |
b93a436e JL |
9980 | case LT_EXPR: |
9981 | if ((GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
9982 | == MODE_INT) | |
9983 | && !can_compare_p (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
9984 | do_jump_by_parts_greater (exp, 1, if_false_label, if_true_label); | |
9985 | else | |
9986 | comparison = compare (exp, LT, LTU); | |
9987 | break; | |
bbf6f052 | 9988 | |
b93a436e JL |
9989 | case LE_EXPR: |
9990 | if ((GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
9991 | == MODE_INT) | |
9992 | && !can_compare_p (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
9993 | do_jump_by_parts_greater (exp, 0, if_true_label, if_false_label); | |
9994 | else | |
9995 | comparison = compare (exp, LE, LEU); | |
9996 | break; | |
bbf6f052 | 9997 | |
b93a436e JL |
9998 | case GT_EXPR: |
9999 | if ((GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10000 | == MODE_INT) | |
10001 | && !can_compare_p (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
10002 | do_jump_by_parts_greater (exp, 0, if_false_label, if_true_label); | |
10003 | else | |
10004 | comparison = compare (exp, GT, GTU); | |
10005 | break; | |
bbf6f052 | 10006 | |
b93a436e JL |
10007 | case GE_EXPR: |
10008 | if ((GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10009 | == MODE_INT) | |
10010 | && !can_compare_p (TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))))) | |
10011 | do_jump_by_parts_greater (exp, 1, if_true_label, if_false_label); | |
10012 | else | |
10013 | comparison = compare (exp, GE, GEU); | |
10014 | break; | |
bbf6f052 | 10015 | |
b93a436e JL |
10016 | default: |
10017 | normal: | |
10018 | temp = expand_expr (exp, NULL_RTX, VOIDmode, 0); | |
10019 | #if 0 | |
10020 | /* This is not needed any more and causes poor code since it causes | |
10021 | comparisons and tests from non-SI objects to have different code | |
10022 | sequences. */ | |
10023 | /* Copy to register to avoid generating bad insns by cse | |
10024 | from (set (mem ...) (arithop)) (set (cc0) (mem ...)). */ | |
10025 | if (!cse_not_expected && GET_CODE (temp) == MEM) | |
10026 | temp = copy_to_reg (temp); | |
ca695ac9 | 10027 | #endif |
b93a436e JL |
10028 | do_pending_stack_adjust (); |
10029 | if (GET_CODE (temp) == CONST_INT) | |
10030 | comparison = (temp == const0_rtx ? const0_rtx : const_true_rtx); | |
10031 | else if (GET_CODE (temp) == LABEL_REF) | |
10032 | comparison = const_true_rtx; | |
10033 | else if (GET_MODE_CLASS (GET_MODE (temp)) == MODE_INT | |
10034 | && !can_compare_p (GET_MODE (temp))) | |
10035 | /* Note swapping the labels gives us not-equal. */ | |
10036 | do_jump_by_parts_equality_rtx (temp, if_true_label, if_false_label); | |
10037 | else if (GET_MODE (temp) != VOIDmode) | |
10038 | comparison = compare_from_rtx (temp, CONST0_RTX (GET_MODE (temp)), | |
10039 | NE, TREE_UNSIGNED (TREE_TYPE (exp)), | |
10040 | GET_MODE (temp), NULL_RTX, 0); | |
10041 | else | |
10042 | abort (); | |
10043 | } | |
bbf6f052 | 10044 | |
b93a436e JL |
10045 | /* Do any postincrements in the expression that was tested. */ |
10046 | emit_queue (); | |
bbf6f052 | 10047 | |
b93a436e JL |
10048 | /* If COMPARISON is nonzero here, it is an rtx that can be substituted |
10049 | straight into a conditional jump instruction as the jump condition. | |
10050 | Otherwise, all the work has been done already. */ | |
bbf6f052 | 10051 | |
b93a436e JL |
10052 | if (comparison == const_true_rtx) |
10053 | { | |
10054 | if (if_true_label) | |
10055 | emit_jump (if_true_label); | |
10056 | } | |
10057 | else if (comparison == const0_rtx) | |
10058 | { | |
10059 | if (if_false_label) | |
10060 | emit_jump (if_false_label); | |
10061 | } | |
10062 | else if (comparison) | |
10063 | do_jump_for_compare (comparison, if_false_label, if_true_label); | |
bbf6f052 | 10064 | |
b93a436e JL |
10065 | if (drop_through_label) |
10066 | { | |
10067 | /* If do_jump produces code that might be jumped around, | |
10068 | do any stack adjusts from that code, before the place | |
10069 | where control merges in. */ | |
10070 | do_pending_stack_adjust (); | |
10071 | emit_label (drop_through_label); | |
10072 | } | |
bbf6f052 | 10073 | } |
b93a436e JL |
10074 | \f |
10075 | /* Given a comparison expression EXP for values too wide to be compared | |
10076 | with one insn, test the comparison and jump to the appropriate label. | |
10077 | The code of EXP is ignored; we always test GT if SWAP is 0, | |
10078 | and LT if SWAP is 1. */ | |
bbf6f052 | 10079 | |
b93a436e JL |
10080 | static void |
10081 | do_jump_by_parts_greater (exp, swap, if_false_label, if_true_label) | |
10082 | tree exp; | |
10083 | int swap; | |
10084 | rtx if_false_label, if_true_label; | |
10085 | { | |
10086 | rtx op0 = expand_expr (TREE_OPERAND (exp, swap), NULL_RTX, VOIDmode, 0); | |
10087 | rtx op1 = expand_expr (TREE_OPERAND (exp, !swap), NULL_RTX, VOIDmode, 0); | |
10088 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
10089 | int nwords = (GET_MODE_SIZE (mode) / UNITS_PER_WORD); | |
10090 | rtx drop_through_label = 0; | |
10091 | int unsignedp = TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
10092 | int i; | |
bbf6f052 | 10093 | |
b93a436e JL |
10094 | if (! if_true_label || ! if_false_label) |
10095 | drop_through_label = gen_label_rtx (); | |
10096 | if (! if_true_label) | |
10097 | if_true_label = drop_through_label; | |
10098 | if (! if_false_label) | |
10099 | if_false_label = drop_through_label; | |
bbf6f052 | 10100 | |
b93a436e JL |
10101 | /* Compare a word at a time, high order first. */ |
10102 | for (i = 0; i < nwords; i++) | |
f81497d9 | 10103 | { |
b93a436e JL |
10104 | rtx comp; |
10105 | rtx op0_word, op1_word; | |
10106 | ||
10107 | if (WORDS_BIG_ENDIAN) | |
10108 | { | |
10109 | op0_word = operand_subword_force (op0, i, mode); | |
10110 | op1_word = operand_subword_force (op1, i, mode); | |
10111 | } | |
f81497d9 | 10112 | else |
b93a436e JL |
10113 | { |
10114 | op0_word = operand_subword_force (op0, nwords - 1 - i, mode); | |
10115 | op1_word = operand_subword_force (op1, nwords - 1 - i, mode); | |
10116 | } | |
10117 | ||
10118 | /* All but high-order word must be compared as unsigned. */ | |
10119 | comp = compare_from_rtx (op0_word, op1_word, | |
10120 | (unsignedp || i > 0) ? GTU : GT, | |
10121 | unsignedp, word_mode, NULL_RTX, 0); | |
10122 | if (comp == const_true_rtx) | |
10123 | emit_jump (if_true_label); | |
10124 | else if (comp != const0_rtx) | |
10125 | do_jump_for_compare (comp, NULL_RTX, if_true_label); | |
10126 | ||
10127 | /* Consider lower words only if these are equal. */ | |
10128 | comp = compare_from_rtx (op0_word, op1_word, NE, unsignedp, word_mode, | |
10129 | NULL_RTX, 0); | |
10130 | if (comp == const_true_rtx) | |
10131 | emit_jump (if_false_label); | |
10132 | else if (comp != const0_rtx) | |
10133 | do_jump_for_compare (comp, NULL_RTX, if_false_label); | |
f81497d9 | 10134 | } |
ca695ac9 | 10135 | |
b93a436e JL |
10136 | if (if_false_label) |
10137 | emit_jump (if_false_label); | |
10138 | if (drop_through_label) | |
10139 | emit_label (drop_through_label); | |
f81497d9 RS |
10140 | } |
10141 | ||
b93a436e JL |
10142 | /* Compare OP0 with OP1, word at a time, in mode MODE. |
10143 | UNSIGNEDP says to do unsigned comparison. | |
10144 | Jump to IF_TRUE_LABEL if OP0 is greater, IF_FALSE_LABEL otherwise. */ | |
f81497d9 | 10145 | |
b93a436e JL |
10146 | void |
10147 | do_jump_by_parts_greater_rtx (mode, unsignedp, op0, op1, if_false_label, if_true_label) | |
10148 | enum machine_mode mode; | |
10149 | int unsignedp; | |
10150 | rtx op0, op1; | |
10151 | rtx if_false_label, if_true_label; | |
f81497d9 | 10152 | { |
b93a436e JL |
10153 | int nwords = (GET_MODE_SIZE (mode) / UNITS_PER_WORD); |
10154 | rtx drop_through_label = 0; | |
10155 | int i; | |
f81497d9 | 10156 | |
b93a436e JL |
10157 | if (! if_true_label || ! if_false_label) |
10158 | drop_through_label = gen_label_rtx (); | |
10159 | if (! if_true_label) | |
10160 | if_true_label = drop_through_label; | |
10161 | if (! if_false_label) | |
10162 | if_false_label = drop_through_label; | |
f81497d9 | 10163 | |
b93a436e JL |
10164 | /* Compare a word at a time, high order first. */ |
10165 | for (i = 0; i < nwords; i++) | |
10166 | { | |
10167 | rtx comp; | |
10168 | rtx op0_word, op1_word; | |
bbf6f052 | 10169 | |
b93a436e JL |
10170 | if (WORDS_BIG_ENDIAN) |
10171 | { | |
10172 | op0_word = operand_subword_force (op0, i, mode); | |
10173 | op1_word = operand_subword_force (op1, i, mode); | |
10174 | } | |
10175 | else | |
10176 | { | |
10177 | op0_word = operand_subword_force (op0, nwords - 1 - i, mode); | |
10178 | op1_word = operand_subword_force (op1, nwords - 1 - i, mode); | |
10179 | } | |
bbf6f052 | 10180 | |
b93a436e JL |
10181 | /* All but high-order word must be compared as unsigned. */ |
10182 | comp = compare_from_rtx (op0_word, op1_word, | |
10183 | (unsignedp || i > 0) ? GTU : GT, | |
10184 | unsignedp, word_mode, NULL_RTX, 0); | |
10185 | if (comp == const_true_rtx) | |
10186 | emit_jump (if_true_label); | |
10187 | else if (comp != const0_rtx) | |
10188 | do_jump_for_compare (comp, NULL_RTX, if_true_label); | |
bbf6f052 | 10189 | |
b93a436e JL |
10190 | /* Consider lower words only if these are equal. */ |
10191 | comp = compare_from_rtx (op0_word, op1_word, NE, unsignedp, word_mode, | |
10192 | NULL_RTX, 0); | |
10193 | if (comp == const_true_rtx) | |
10194 | emit_jump (if_false_label); | |
10195 | else if (comp != const0_rtx) | |
10196 | do_jump_for_compare (comp, NULL_RTX, if_false_label); | |
10197 | } | |
bbf6f052 | 10198 | |
b93a436e JL |
10199 | if (if_false_label) |
10200 | emit_jump (if_false_label); | |
10201 | if (drop_through_label) | |
10202 | emit_label (drop_through_label); | |
bbf6f052 RK |
10203 | } |
10204 | ||
b93a436e JL |
10205 | /* Given an EQ_EXPR expression EXP for values too wide to be compared |
10206 | with one insn, test the comparison and jump to the appropriate label. */ | |
bbf6f052 | 10207 | |
b93a436e JL |
10208 | static void |
10209 | do_jump_by_parts_equality (exp, if_false_label, if_true_label) | |
10210 | tree exp; | |
10211 | rtx if_false_label, if_true_label; | |
bbf6f052 | 10212 | { |
b93a436e JL |
10213 | rtx op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0); |
10214 | rtx op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); | |
10215 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
10216 | int nwords = (GET_MODE_SIZE (mode) / UNITS_PER_WORD); | |
10217 | int i; | |
10218 | rtx drop_through_label = 0; | |
bbf6f052 | 10219 | |
b93a436e JL |
10220 | if (! if_false_label) |
10221 | drop_through_label = if_false_label = gen_label_rtx (); | |
bbf6f052 | 10222 | |
b93a436e JL |
10223 | for (i = 0; i < nwords; i++) |
10224 | { | |
10225 | rtx comp = compare_from_rtx (operand_subword_force (op0, i, mode), | |
10226 | operand_subword_force (op1, i, mode), | |
10227 | EQ, TREE_UNSIGNED (TREE_TYPE (exp)), | |
10228 | word_mode, NULL_RTX, 0); | |
10229 | if (comp == const_true_rtx) | |
10230 | emit_jump (if_false_label); | |
10231 | else if (comp != const0_rtx) | |
10232 | do_jump_for_compare (comp, if_false_label, NULL_RTX); | |
10233 | } | |
bbf6f052 | 10234 | |
b93a436e JL |
10235 | if (if_true_label) |
10236 | emit_jump (if_true_label); | |
10237 | if (drop_through_label) | |
10238 | emit_label (drop_through_label); | |
bbf6f052 | 10239 | } |
b93a436e JL |
10240 | \f |
10241 | /* Jump according to whether OP0 is 0. | |
10242 | We assume that OP0 has an integer mode that is too wide | |
10243 | for the available compare insns. */ | |
bbf6f052 | 10244 | |
f5963e61 | 10245 | void |
b93a436e JL |
10246 | do_jump_by_parts_equality_rtx (op0, if_false_label, if_true_label) |
10247 | rtx op0; | |
10248 | rtx if_false_label, if_true_label; | |
ca695ac9 | 10249 | { |
b93a436e JL |
10250 | int nwords = GET_MODE_SIZE (GET_MODE (op0)) / UNITS_PER_WORD; |
10251 | rtx part; | |
10252 | int i; | |
10253 | rtx drop_through_label = 0; | |
bbf6f052 | 10254 | |
b93a436e JL |
10255 | /* The fastest way of doing this comparison on almost any machine is to |
10256 | "or" all the words and compare the result. If all have to be loaded | |
10257 | from memory and this is a very wide item, it's possible this may | |
10258 | be slower, but that's highly unlikely. */ | |
bbf6f052 | 10259 | |
b93a436e JL |
10260 | part = gen_reg_rtx (word_mode); |
10261 | emit_move_insn (part, operand_subword_force (op0, 0, GET_MODE (op0))); | |
10262 | for (i = 1; i < nwords && part != 0; i++) | |
10263 | part = expand_binop (word_mode, ior_optab, part, | |
10264 | operand_subword_force (op0, i, GET_MODE (op0)), | |
10265 | part, 1, OPTAB_WIDEN); | |
bbf6f052 | 10266 | |
b93a436e JL |
10267 | if (part != 0) |
10268 | { | |
10269 | rtx comp = compare_from_rtx (part, const0_rtx, EQ, 1, word_mode, | |
10270 | NULL_RTX, 0); | |
0f41302f | 10271 | |
b93a436e JL |
10272 | if (comp == const_true_rtx) |
10273 | emit_jump (if_false_label); | |
10274 | else if (comp == const0_rtx) | |
10275 | emit_jump (if_true_label); | |
10276 | else | |
10277 | do_jump_for_compare (comp, if_false_label, if_true_label); | |
bbf6f052 | 10278 | |
b93a436e JL |
10279 | return; |
10280 | } | |
bbf6f052 | 10281 | |
b93a436e JL |
10282 | /* If we couldn't do the "or" simply, do this with a series of compares. */ |
10283 | if (! if_false_label) | |
10284 | drop_through_label = if_false_label = gen_label_rtx (); | |
bbf6f052 | 10285 | |
b93a436e JL |
10286 | for (i = 0; i < nwords; i++) |
10287 | { | |
10288 | rtx comp = compare_from_rtx (operand_subword_force (op0, i, | |
10289 | GET_MODE (op0)), | |
10290 | const0_rtx, EQ, 1, word_mode, NULL_RTX, 0); | |
10291 | if (comp == const_true_rtx) | |
10292 | emit_jump (if_false_label); | |
10293 | else if (comp != const0_rtx) | |
10294 | do_jump_for_compare (comp, if_false_label, NULL_RTX); | |
10295 | } | |
bbf6f052 | 10296 | |
b93a436e JL |
10297 | if (if_true_label) |
10298 | emit_jump (if_true_label); | |
0f41302f | 10299 | |
b93a436e JL |
10300 | if (drop_through_label) |
10301 | emit_label (drop_through_label); | |
bbf6f052 | 10302 | } |
bbf6f052 | 10303 | |
b93a436e JL |
10304 | /* Given a comparison expression in rtl form, output conditional branches to |
10305 | IF_TRUE_LABEL, IF_FALSE_LABEL, or both. */ | |
bbf6f052 | 10306 | |
b93a436e JL |
10307 | static void |
10308 | do_jump_for_compare (comparison, if_false_label, if_true_label) | |
10309 | rtx comparison, if_false_label, if_true_label; | |
bbf6f052 | 10310 | { |
b93a436e JL |
10311 | if (if_true_label) |
10312 | { | |
10313 | if (bcc_gen_fctn[(int) GET_CODE (comparison)] != 0) | |
10314 | emit_jump_insn ((*bcc_gen_fctn[(int) GET_CODE (comparison)]) (if_true_label)); | |
10315 | else | |
10316 | abort (); | |
ca695ac9 | 10317 | |
b93a436e JL |
10318 | if (if_false_label) |
10319 | emit_jump (if_false_label); | |
10320 | } | |
10321 | else if (if_false_label) | |
10322 | { | |
10323 | rtx insn; | |
10324 | rtx prev = get_last_insn (); | |
10325 | rtx branch = 0; | |
0f41302f | 10326 | |
b93a436e JL |
10327 | /* Output the branch with the opposite condition. Then try to invert |
10328 | what is generated. If more than one insn is a branch, or if the | |
10329 | branch is not the last insn written, abort. If we can't invert | |
10330 | the branch, emit make a true label, redirect this jump to that, | |
10331 | emit a jump to the false label and define the true label. */ | |
bbf6f052 | 10332 | |
b93a436e JL |
10333 | if (bcc_gen_fctn[(int) GET_CODE (comparison)] != 0) |
10334 | emit_jump_insn ((*bcc_gen_fctn[(int) GET_CODE (comparison)])(if_false_label)); | |
10335 | else | |
10336 | abort (); | |
bbf6f052 | 10337 | |
b93a436e JL |
10338 | /* Here we get the first insn that was just emitted. It used to be the |
10339 | case that, on some machines, emitting the branch would discard | |
10340 | the previous compare insn and emit a replacement. This isn't | |
10341 | done anymore, but abort if we see that PREV is deleted. */ | |
bbf6f052 | 10342 | |
b93a436e JL |
10343 | if (prev == 0) |
10344 | insn = get_insns (); | |
10345 | else if (INSN_DELETED_P (prev)) | |
10346 | abort (); | |
10347 | else | |
10348 | insn = NEXT_INSN (prev); | |
bbf6f052 | 10349 | |
b93a436e JL |
10350 | for (; insn; insn = NEXT_INSN (insn)) |
10351 | if (GET_CODE (insn) == JUMP_INSN) | |
10352 | { | |
10353 | if (branch) | |
10354 | abort (); | |
10355 | branch = insn; | |
10356 | } | |
a7c5971a | 10357 | |
b93a436e JL |
10358 | if (branch != get_last_insn ()) |
10359 | abort (); | |
bbf6f052 | 10360 | |
b93a436e JL |
10361 | JUMP_LABEL (branch) = if_false_label; |
10362 | if (! invert_jump (branch, if_false_label)) | |
10363 | { | |
10364 | if_true_label = gen_label_rtx (); | |
10365 | redirect_jump (branch, if_true_label); | |
10366 | emit_jump (if_false_label); | |
10367 | emit_label (if_true_label); | |
10368 | } | |
10369 | } | |
10370 | } | |
10371 | \f | |
10372 | /* Generate code for a comparison expression EXP | |
10373 | (including code to compute the values to be compared) | |
10374 | and set (CC0) according to the result. | |
10375 | SIGNED_CODE should be the rtx operation for this comparison for | |
10376 | signed data; UNSIGNED_CODE, likewise for use if data is unsigned. | |
bbf6f052 | 10377 | |
b93a436e JL |
10378 | We force a stack adjustment unless there are currently |
10379 | things pushed on the stack that aren't yet used. */ | |
ca695ac9 | 10380 | |
b93a436e JL |
10381 | static rtx |
10382 | compare (exp, signed_code, unsigned_code) | |
10383 | register tree exp; | |
10384 | enum rtx_code signed_code, unsigned_code; | |
10385 | { | |
10386 | register rtx op0 | |
10387 | = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0); | |
10388 | register rtx op1 | |
10389 | = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0); | |
10390 | register tree type = TREE_TYPE (TREE_OPERAND (exp, 0)); | |
10391 | register enum machine_mode mode = TYPE_MODE (type); | |
10392 | int unsignedp = TREE_UNSIGNED (type); | |
10393 | enum rtx_code code = unsignedp ? unsigned_code : signed_code; | |
ca695ac9 | 10394 | |
b93a436e JL |
10395 | #ifdef HAVE_canonicalize_funcptr_for_compare |
10396 | /* If function pointers need to be "canonicalized" before they can | |
10397 | be reliably compared, then canonicalize them. */ | |
10398 | if (HAVE_canonicalize_funcptr_for_compare | |
10399 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == POINTER_TYPE | |
10400 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10401 | == FUNCTION_TYPE)) | |
bbf6f052 | 10402 | { |
b93a436e | 10403 | rtx new_op0 = gen_reg_rtx (mode); |
bbf6f052 | 10404 | |
b93a436e JL |
10405 | emit_insn (gen_canonicalize_funcptr_for_compare (new_op0, op0)); |
10406 | op0 = new_op0; | |
ca695ac9 | 10407 | } |
bbf6f052 | 10408 | |
b93a436e JL |
10409 | if (HAVE_canonicalize_funcptr_for_compare |
10410 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 1))) == POINTER_TYPE | |
10411 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 1)))) | |
10412 | == FUNCTION_TYPE)) | |
10413 | { | |
10414 | rtx new_op1 = gen_reg_rtx (mode); | |
bbf6f052 | 10415 | |
b93a436e JL |
10416 | emit_insn (gen_canonicalize_funcptr_for_compare (new_op1, op1)); |
10417 | op1 = new_op1; | |
10418 | } | |
10419 | #endif | |
0f41302f | 10420 | |
b93a436e JL |
10421 | return compare_from_rtx (op0, op1, code, unsignedp, mode, |
10422 | ((mode == BLKmode) | |
10423 | ? expr_size (TREE_OPERAND (exp, 0)) : NULL_RTX), | |
10424 | TYPE_ALIGN (TREE_TYPE (exp)) / BITS_PER_UNIT); | |
ca695ac9 | 10425 | } |
bbf6f052 | 10426 | |
b93a436e JL |
10427 | /* Like compare but expects the values to compare as two rtx's. |
10428 | The decision as to signed or unsigned comparison must be made by the caller. | |
bbf6f052 | 10429 | |
b93a436e JL |
10430 | If MODE is BLKmode, SIZE is an RTX giving the size of the objects being |
10431 | compared. | |
bbf6f052 | 10432 | |
b93a436e JL |
10433 | If ALIGN is non-zero, it is the alignment of this type; if zero, the |
10434 | size of MODE should be used. */ | |
ca695ac9 | 10435 | |
b93a436e JL |
10436 | rtx |
10437 | compare_from_rtx (op0, op1, code, unsignedp, mode, size, align) | |
10438 | register rtx op0, op1; | |
10439 | enum rtx_code code; | |
10440 | int unsignedp; | |
10441 | enum machine_mode mode; | |
10442 | rtx size; | |
10443 | int align; | |
bbf6f052 | 10444 | { |
b93a436e | 10445 | rtx tem; |
bbf6f052 | 10446 | |
b93a436e JL |
10447 | /* If one operand is constant, make it the second one. Only do this |
10448 | if the other operand is not constant as well. */ | |
e7c33f54 | 10449 | |
b93a436e JL |
10450 | if ((CONSTANT_P (op0) && ! CONSTANT_P (op1)) |
10451 | || (GET_CODE (op0) == CONST_INT && GET_CODE (op1) != CONST_INT)) | |
ca695ac9 | 10452 | { |
b93a436e JL |
10453 | tem = op0; |
10454 | op0 = op1; | |
10455 | op1 = tem; | |
10456 | code = swap_condition (code); | |
10457 | } | |
bbf6f052 | 10458 | |
b93a436e JL |
10459 | if (flag_force_mem) |
10460 | { | |
10461 | op0 = force_not_mem (op0); | |
10462 | op1 = force_not_mem (op1); | |
10463 | } | |
bbf6f052 | 10464 | |
b93a436e | 10465 | do_pending_stack_adjust (); |
ca695ac9 | 10466 | |
b93a436e JL |
10467 | if (GET_CODE (op0) == CONST_INT && GET_CODE (op1) == CONST_INT |
10468 | && (tem = simplify_relational_operation (code, mode, op0, op1)) != 0) | |
10469 | return tem; | |
ca695ac9 | 10470 | |
b93a436e JL |
10471 | #if 0 |
10472 | /* There's no need to do this now that combine.c can eliminate lots of | |
10473 | sign extensions. This can be less efficient in certain cases on other | |
10474 | machines. */ | |
ca695ac9 | 10475 | |
b93a436e JL |
10476 | /* If this is a signed equality comparison, we can do it as an |
10477 | unsigned comparison since zero-extension is cheaper than sign | |
10478 | extension and comparisons with zero are done as unsigned. This is | |
10479 | the case even on machines that can do fast sign extension, since | |
10480 | zero-extension is easier to combine with other operations than | |
10481 | sign-extension is. If we are comparing against a constant, we must | |
10482 | convert it to what it would look like unsigned. */ | |
10483 | if ((code == EQ || code == NE) && ! unsignedp | |
10484 | && GET_MODE_BITSIZE (GET_MODE (op0)) <= HOST_BITS_PER_WIDE_INT) | |
10485 | { | |
10486 | if (GET_CODE (op1) == CONST_INT | |
10487 | && (INTVAL (op1) & GET_MODE_MASK (GET_MODE (op0))) != INTVAL (op1)) | |
10488 | op1 = GEN_INT (INTVAL (op1) & GET_MODE_MASK (GET_MODE (op0))); | |
10489 | unsignedp = 1; | |
10490 | } | |
10491 | #endif | |
ca695ac9 | 10492 | |
b93a436e | 10493 | emit_cmp_insn (op0, op1, code, size, mode, unsignedp, align); |
ca695ac9 | 10494 | |
b93a436e JL |
10495 | return gen_rtx_fmt_ee (code, VOIDmode, cc0_rtx, const0_rtx); |
10496 | } | |
10497 | \f | |
10498 | /* Generate code to calculate EXP using a store-flag instruction | |
10499 | and return an rtx for the result. EXP is either a comparison | |
10500 | or a TRUTH_NOT_EXPR whose operand is a comparison. | |
ca695ac9 | 10501 | |
b93a436e | 10502 | If TARGET is nonzero, store the result there if convenient. |
ca695ac9 | 10503 | |
b93a436e JL |
10504 | If ONLY_CHEAP is non-zero, only do this if it is likely to be very |
10505 | cheap. | |
ca695ac9 | 10506 | |
b93a436e JL |
10507 | Return zero if there is no suitable set-flag instruction |
10508 | available on this machine. | |
ca695ac9 | 10509 | |
b93a436e JL |
10510 | Once expand_expr has been called on the arguments of the comparison, |
10511 | we are committed to doing the store flag, since it is not safe to | |
10512 | re-evaluate the expression. We emit the store-flag insn by calling | |
10513 | emit_store_flag, but only expand the arguments if we have a reason | |
10514 | to believe that emit_store_flag will be successful. If we think that | |
10515 | it will, but it isn't, we have to simulate the store-flag with a | |
10516 | set/jump/set sequence. */ | |
ca695ac9 | 10517 | |
b93a436e JL |
10518 | static rtx |
10519 | do_store_flag (exp, target, mode, only_cheap) | |
10520 | tree exp; | |
10521 | rtx target; | |
10522 | enum machine_mode mode; | |
10523 | int only_cheap; | |
10524 | { | |
10525 | enum rtx_code code; | |
10526 | tree arg0, arg1, type; | |
10527 | tree tem; | |
10528 | enum machine_mode operand_mode; | |
10529 | int invert = 0; | |
10530 | int unsignedp; | |
10531 | rtx op0, op1; | |
10532 | enum insn_code icode; | |
10533 | rtx subtarget = target; | |
381127e8 | 10534 | rtx result, label; |
ca695ac9 | 10535 | |
b93a436e JL |
10536 | /* If this is a TRUTH_NOT_EXPR, set a flag indicating we must invert the |
10537 | result at the end. We can't simply invert the test since it would | |
10538 | have already been inverted if it were valid. This case occurs for | |
10539 | some floating-point comparisons. */ | |
ca695ac9 | 10540 | |
b93a436e JL |
10541 | if (TREE_CODE (exp) == TRUTH_NOT_EXPR) |
10542 | invert = 1, exp = TREE_OPERAND (exp, 0); | |
ca695ac9 | 10543 | |
b93a436e JL |
10544 | arg0 = TREE_OPERAND (exp, 0); |
10545 | arg1 = TREE_OPERAND (exp, 1); | |
10546 | type = TREE_TYPE (arg0); | |
10547 | operand_mode = TYPE_MODE (type); | |
10548 | unsignedp = TREE_UNSIGNED (type); | |
ca695ac9 | 10549 | |
b93a436e JL |
10550 | /* We won't bother with BLKmode store-flag operations because it would mean |
10551 | passing a lot of information to emit_store_flag. */ | |
10552 | if (operand_mode == BLKmode) | |
10553 | return 0; | |
ca695ac9 | 10554 | |
b93a436e JL |
10555 | /* We won't bother with store-flag operations involving function pointers |
10556 | when function pointers must be canonicalized before comparisons. */ | |
10557 | #ifdef HAVE_canonicalize_funcptr_for_compare | |
10558 | if (HAVE_canonicalize_funcptr_for_compare | |
10559 | && ((TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == POINTER_TYPE | |
10560 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))) | |
10561 | == FUNCTION_TYPE)) | |
10562 | || (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 1))) == POINTER_TYPE | |
10563 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 1)))) | |
10564 | == FUNCTION_TYPE)))) | |
10565 | return 0; | |
ca695ac9 JB |
10566 | #endif |
10567 | ||
b93a436e JL |
10568 | STRIP_NOPS (arg0); |
10569 | STRIP_NOPS (arg1); | |
ca695ac9 | 10570 | |
b93a436e JL |
10571 | /* Get the rtx comparison code to use. We know that EXP is a comparison |
10572 | operation of some type. Some comparisons against 1 and -1 can be | |
10573 | converted to comparisons with zero. Do so here so that the tests | |
10574 | below will be aware that we have a comparison with zero. These | |
10575 | tests will not catch constants in the first operand, but constants | |
10576 | are rarely passed as the first operand. */ | |
ca695ac9 | 10577 | |
b93a436e JL |
10578 | switch (TREE_CODE (exp)) |
10579 | { | |
10580 | case EQ_EXPR: | |
10581 | code = EQ; | |
bbf6f052 | 10582 | break; |
b93a436e JL |
10583 | case NE_EXPR: |
10584 | code = NE; | |
bbf6f052 | 10585 | break; |
b93a436e JL |
10586 | case LT_EXPR: |
10587 | if (integer_onep (arg1)) | |
10588 | arg1 = integer_zero_node, code = unsignedp ? LEU : LE; | |
10589 | else | |
10590 | code = unsignedp ? LTU : LT; | |
ca695ac9 | 10591 | break; |
b93a436e JL |
10592 | case LE_EXPR: |
10593 | if (! unsignedp && integer_all_onesp (arg1)) | |
10594 | arg1 = integer_zero_node, code = LT; | |
10595 | else | |
10596 | code = unsignedp ? LEU : LE; | |
ca695ac9 | 10597 | break; |
b93a436e JL |
10598 | case GT_EXPR: |
10599 | if (! unsignedp && integer_all_onesp (arg1)) | |
10600 | arg1 = integer_zero_node, code = GE; | |
10601 | else | |
10602 | code = unsignedp ? GTU : GT; | |
10603 | break; | |
10604 | case GE_EXPR: | |
10605 | if (integer_onep (arg1)) | |
10606 | arg1 = integer_zero_node, code = unsignedp ? GTU : GT; | |
10607 | else | |
10608 | code = unsignedp ? GEU : GE; | |
ca695ac9 | 10609 | break; |
ca695ac9 | 10610 | default: |
b93a436e | 10611 | abort (); |
bbf6f052 | 10612 | } |
bbf6f052 | 10613 | |
b93a436e JL |
10614 | /* Put a constant second. */ |
10615 | if (TREE_CODE (arg0) == REAL_CST || TREE_CODE (arg0) == INTEGER_CST) | |
10616 | { | |
10617 | tem = arg0; arg0 = arg1; arg1 = tem; | |
10618 | code = swap_condition (code); | |
ca695ac9 | 10619 | } |
bbf6f052 | 10620 | |
b93a436e JL |
10621 | /* If this is an equality or inequality test of a single bit, we can |
10622 | do this by shifting the bit being tested to the low-order bit and | |
10623 | masking the result with the constant 1. If the condition was EQ, | |
10624 | we xor it with 1. This does not require an scc insn and is faster | |
10625 | than an scc insn even if we have it. */ | |
d39985fa | 10626 | |
b93a436e JL |
10627 | if ((code == NE || code == EQ) |
10628 | && TREE_CODE (arg0) == BIT_AND_EXPR && integer_zerop (arg1) | |
10629 | && integer_pow2p (TREE_OPERAND (arg0, 1))) | |
10630 | { | |
10631 | tree inner = TREE_OPERAND (arg0, 0); | |
10632 | int bitnum = tree_log2 (TREE_OPERAND (arg0, 1)); | |
10633 | int ops_unsignedp; | |
bbf6f052 | 10634 | |
b93a436e JL |
10635 | /* If INNER is a right shift of a constant and it plus BITNUM does |
10636 | not overflow, adjust BITNUM and INNER. */ | |
ca695ac9 | 10637 | |
b93a436e JL |
10638 | if (TREE_CODE (inner) == RSHIFT_EXPR |
10639 | && TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST | |
10640 | && TREE_INT_CST_HIGH (TREE_OPERAND (inner, 1)) == 0 | |
10641 | && (bitnum + TREE_INT_CST_LOW (TREE_OPERAND (inner, 1)) | |
10642 | < TYPE_PRECISION (type))) | |
ca695ac9 | 10643 | { |
b93a436e JL |
10644 | bitnum += TREE_INT_CST_LOW (TREE_OPERAND (inner, 1)); |
10645 | inner = TREE_OPERAND (inner, 0); | |
ca695ac9 | 10646 | } |
ca695ac9 | 10647 | |
b93a436e JL |
10648 | /* If we are going to be able to omit the AND below, we must do our |
10649 | operations as unsigned. If we must use the AND, we have a choice. | |
10650 | Normally unsigned is faster, but for some machines signed is. */ | |
10651 | ops_unsignedp = (bitnum == TYPE_PRECISION (type) - 1 ? 1 | |
10652 | #ifdef LOAD_EXTEND_OP | |
10653 | : (LOAD_EXTEND_OP (operand_mode) == SIGN_EXTEND ? 0 : 1) | |
10654 | #else | |
10655 | : 1 | |
10656 | #endif | |
10657 | ); | |
bbf6f052 | 10658 | |
b93a436e JL |
10659 | if (subtarget == 0 || GET_CODE (subtarget) != REG |
10660 | || GET_MODE (subtarget) != operand_mode | |
e5e809f4 | 10661 | || ! safe_from_p (subtarget, inner, 1)) |
b93a436e | 10662 | subtarget = 0; |
bbf6f052 | 10663 | |
b93a436e | 10664 | op0 = expand_expr (inner, subtarget, VOIDmode, 0); |
bbf6f052 | 10665 | |
b93a436e JL |
10666 | if (bitnum != 0) |
10667 | op0 = expand_shift (RSHIFT_EXPR, GET_MODE (op0), op0, | |
10668 | size_int (bitnum), subtarget, ops_unsignedp); | |
bbf6f052 | 10669 | |
b93a436e JL |
10670 | if (GET_MODE (op0) != mode) |
10671 | op0 = convert_to_mode (mode, op0, ops_unsignedp); | |
bbf6f052 | 10672 | |
b93a436e JL |
10673 | if ((code == EQ && ! invert) || (code == NE && invert)) |
10674 | op0 = expand_binop (mode, xor_optab, op0, const1_rtx, subtarget, | |
10675 | ops_unsignedp, OPTAB_LIB_WIDEN); | |
bbf6f052 | 10676 | |
b93a436e JL |
10677 | /* Put the AND last so it can combine with more things. */ |
10678 | if (bitnum != TYPE_PRECISION (type) - 1) | |
10679 | op0 = expand_and (op0, const1_rtx, subtarget); | |
bbf6f052 | 10680 | |
b93a436e JL |
10681 | return op0; |
10682 | } | |
bbf6f052 | 10683 | |
b93a436e JL |
10684 | /* Now see if we are likely to be able to do this. Return if not. */ |
10685 | if (! can_compare_p (operand_mode)) | |
10686 | return 0; | |
10687 | icode = setcc_gen_code[(int) code]; | |
10688 | if (icode == CODE_FOR_nothing | |
10689 | || (only_cheap && insn_operand_mode[(int) icode][0] != mode)) | |
ca695ac9 | 10690 | { |
b93a436e JL |
10691 | /* We can only do this if it is one of the special cases that |
10692 | can be handled without an scc insn. */ | |
10693 | if ((code == LT && integer_zerop (arg1)) | |
10694 | || (! only_cheap && code == GE && integer_zerop (arg1))) | |
10695 | ; | |
10696 | else if (BRANCH_COST >= 0 | |
10697 | && ! only_cheap && (code == NE || code == EQ) | |
10698 | && TREE_CODE (type) != REAL_TYPE | |
10699 | && ((abs_optab->handlers[(int) operand_mode].insn_code | |
10700 | != CODE_FOR_nothing) | |
10701 | || (ffs_optab->handlers[(int) operand_mode].insn_code | |
10702 | != CODE_FOR_nothing))) | |
10703 | ; | |
10704 | else | |
10705 | return 0; | |
ca695ac9 | 10706 | } |
b93a436e JL |
10707 | |
10708 | preexpand_calls (exp); | |
10709 | if (subtarget == 0 || GET_CODE (subtarget) != REG | |
10710 | || GET_MODE (subtarget) != operand_mode | |
e5e809f4 | 10711 | || ! safe_from_p (subtarget, arg1, 1)) |
b93a436e JL |
10712 | subtarget = 0; |
10713 | ||
10714 | op0 = expand_expr (arg0, subtarget, VOIDmode, 0); | |
10715 | op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0); | |
10716 | ||
10717 | if (target == 0) | |
10718 | target = gen_reg_rtx (mode); | |
10719 | ||
10720 | /* Pass copies of OP0 and OP1 in case they contain a QUEUED. This is safe | |
10721 | because, if the emit_store_flag does anything it will succeed and | |
10722 | OP0 and OP1 will not be used subsequently. */ | |
ca695ac9 | 10723 | |
b93a436e JL |
10724 | result = emit_store_flag (target, code, |
10725 | queued_subexp_p (op0) ? copy_rtx (op0) : op0, | |
10726 | queued_subexp_p (op1) ? copy_rtx (op1) : op1, | |
10727 | operand_mode, unsignedp, 1); | |
ca695ac9 | 10728 | |
b93a436e JL |
10729 | if (result) |
10730 | { | |
10731 | if (invert) | |
10732 | result = expand_binop (mode, xor_optab, result, const1_rtx, | |
10733 | result, 0, OPTAB_LIB_WIDEN); | |
10734 | return result; | |
ca695ac9 | 10735 | } |
bbf6f052 | 10736 | |
b93a436e JL |
10737 | /* If this failed, we have to do this with set/compare/jump/set code. */ |
10738 | if (GET_CODE (target) != REG | |
10739 | || reg_mentioned_p (target, op0) || reg_mentioned_p (target, op1)) | |
10740 | target = gen_reg_rtx (GET_MODE (target)); | |
10741 | ||
10742 | emit_move_insn (target, invert ? const0_rtx : const1_rtx); | |
10743 | result = compare_from_rtx (op0, op1, code, unsignedp, | |
10744 | operand_mode, NULL_RTX, 0); | |
10745 | if (GET_CODE (result) == CONST_INT) | |
10746 | return (((result == const0_rtx && ! invert) | |
10747 | || (result != const0_rtx && invert)) | |
10748 | ? const0_rtx : const1_rtx); | |
ca695ac9 | 10749 | |
b93a436e JL |
10750 | label = gen_label_rtx (); |
10751 | if (bcc_gen_fctn[(int) code] == 0) | |
10752 | abort (); | |
0f41302f | 10753 | |
b93a436e JL |
10754 | emit_jump_insn ((*bcc_gen_fctn[(int) code]) (label)); |
10755 | emit_move_insn (target, invert ? const1_rtx : const0_rtx); | |
10756 | emit_label (label); | |
bbf6f052 | 10757 | |
b93a436e | 10758 | return target; |
ca695ac9 | 10759 | } |
b93a436e JL |
10760 | \f |
10761 | /* Generate a tablejump instruction (used for switch statements). */ | |
10762 | ||
10763 | #ifdef HAVE_tablejump | |
e87b4f3f | 10764 | |
b93a436e JL |
10765 | /* INDEX is the value being switched on, with the lowest value |
10766 | in the table already subtracted. | |
10767 | MODE is its expected mode (needed if INDEX is constant). | |
10768 | RANGE is the length of the jump table. | |
10769 | TABLE_LABEL is a CODE_LABEL rtx for the table itself. | |
88d3b7f0 | 10770 | |
b93a436e JL |
10771 | DEFAULT_LABEL is a CODE_LABEL rtx to jump to if the |
10772 | index value is out of range. */ | |
0f41302f | 10773 | |
ca695ac9 | 10774 | void |
b93a436e JL |
10775 | do_tablejump (index, mode, range, table_label, default_label) |
10776 | rtx index, range, table_label, default_label; | |
10777 | enum machine_mode mode; | |
ca695ac9 | 10778 | { |
b93a436e | 10779 | register rtx temp, vector; |
88d3b7f0 | 10780 | |
b93a436e JL |
10781 | /* Do an unsigned comparison (in the proper mode) between the index |
10782 | expression and the value which represents the length of the range. | |
10783 | Since we just finished subtracting the lower bound of the range | |
10784 | from the index expression, this comparison allows us to simultaneously | |
10785 | check that the original index expression value is both greater than | |
10786 | or equal to the minimum value of the range and less than or equal to | |
10787 | the maximum value of the range. */ | |
709f5be1 | 10788 | |
b93a436e JL |
10789 | emit_cmp_insn (index, range, GTU, NULL_RTX, mode, 1, 0); |
10790 | emit_jump_insn (gen_bgtu (default_label)); | |
bbf6f052 | 10791 | |
b93a436e JL |
10792 | /* If index is in range, it must fit in Pmode. |
10793 | Convert to Pmode so we can index with it. */ | |
10794 | if (mode != Pmode) | |
10795 | index = convert_to_mode (Pmode, index, 1); | |
bbf6f052 | 10796 | |
b93a436e JL |
10797 | /* Don't let a MEM slip thru, because then INDEX that comes |
10798 | out of PIC_CASE_VECTOR_ADDRESS won't be a valid address, | |
10799 | and break_out_memory_refs will go to work on it and mess it up. */ | |
10800 | #ifdef PIC_CASE_VECTOR_ADDRESS | |
10801 | if (flag_pic && GET_CODE (index) != REG) | |
10802 | index = copy_to_mode_reg (Pmode, index); | |
10803 | #endif | |
ca695ac9 | 10804 | |
b93a436e JL |
10805 | /* If flag_force_addr were to affect this address |
10806 | it could interfere with the tricky assumptions made | |
10807 | about addresses that contain label-refs, | |
10808 | which may be valid only very near the tablejump itself. */ | |
10809 | /* ??? The only correct use of CASE_VECTOR_MODE is the one inside the | |
10810 | GET_MODE_SIZE, because this indicates how large insns are. The other | |
10811 | uses should all be Pmode, because they are addresses. This code | |
10812 | could fail if addresses and insns are not the same size. */ | |
10813 | index = gen_rtx_PLUS (Pmode, | |
10814 | gen_rtx_MULT (Pmode, index, | |
10815 | GEN_INT (GET_MODE_SIZE (CASE_VECTOR_MODE))), | |
10816 | gen_rtx_LABEL_REF (Pmode, table_label)); | |
10817 | #ifdef PIC_CASE_VECTOR_ADDRESS | |
10818 | if (flag_pic) | |
10819 | index = PIC_CASE_VECTOR_ADDRESS (index); | |
10820 | else | |
bbf6f052 | 10821 | #endif |
b93a436e JL |
10822 | index = memory_address_noforce (CASE_VECTOR_MODE, index); |
10823 | temp = gen_reg_rtx (CASE_VECTOR_MODE); | |
10824 | vector = gen_rtx_MEM (CASE_VECTOR_MODE, index); | |
10825 | RTX_UNCHANGING_P (vector) = 1; | |
10826 | convert_move (temp, vector, 0); | |
10827 | ||
10828 | emit_jump_insn (gen_tablejump (temp, table_label)); | |
10829 | ||
10830 | /* If we are generating PIC code or if the table is PC-relative, the | |
10831 | table and JUMP_INSN must be adjacent, so don't output a BARRIER. */ | |
10832 | if (! CASE_VECTOR_PC_RELATIVE && ! flag_pic) | |
10833 | emit_barrier (); | |
bbf6f052 | 10834 | } |
b93a436e JL |
10835 | |
10836 | #endif /* HAVE_tablejump */ |