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242229bb | 1 | /* A pass for lowering trees to RTL. |
cbe34bb5 | 2 | Copyright (C) 2004-2017 Free Software Foundation, Inc. |
242229bb JH |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
9dcd6f09 | 8 | the Free Software Foundation; either version 3, or (at your option) |
242229bb JH |
9 | any later version. |
10 | ||
11 | GCC 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 | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
242229bb JH |
19 | |
20 | #include "config.h" | |
21 | #include "system.h" | |
22 | #include "coretypes.h" | |
c7131fb2 | 23 | #include "backend.h" |
957060b5 AM |
24 | #include "target.h" |
25 | #include "rtl.h" | |
c7131fb2 AM |
26 | #include "tree.h" |
27 | #include "gimple.h" | |
957060b5 AM |
28 | #include "cfghooks.h" |
29 | #include "tree-pass.h" | |
4d0cdd0c | 30 | #include "memmodel.h" |
957060b5 | 31 | #include "tm_p.h" |
c7131fb2 | 32 | #include "ssa.h" |
957060b5 AM |
33 | #include "optabs.h" |
34 | #include "regs.h" /* For reg_renumber. */ | |
35 | #include "emit-rtl.h" | |
36 | #include "recog.h" | |
37 | #include "cgraph.h" | |
38 | #include "diagnostic.h" | |
40e23961 | 39 | #include "fold-const.h" |
d8a2d370 DN |
40 | #include "varasm.h" |
41 | #include "stor-layout.h" | |
42 | #include "stmt.h" | |
43 | #include "print-tree.h" | |
60393bbc AM |
44 | #include "cfgrtl.h" |
45 | #include "cfganal.h" | |
46 | #include "cfgbuild.h" | |
47 | #include "cfgcleanup.h" | |
36566b39 PK |
48 | #include "dojump.h" |
49 | #include "explow.h" | |
50 | #include "calls.h" | |
242229bb | 51 | #include "expr.h" |
2fb9a547 AM |
52 | #include "internal-fn.h" |
53 | #include "tree-eh.h" | |
5be5c238 | 54 | #include "gimple-iterator.h" |
1b223a9f | 55 | #include "gimple-expr.h" |
5be5c238 | 56 | #include "gimple-walk.h" |
442b4905 | 57 | #include "tree-cfg.h" |
442b4905 | 58 | #include "tree-dfa.h" |
7a300452 | 59 | #include "tree-ssa.h" |
242229bb | 60 | #include "except.h" |
cf835838 | 61 | #include "gimple-pretty-print.h" |
1f6d3a08 | 62 | #include "toplev.h" |
ef330312 | 63 | #include "debug.h" |
7d69de61 | 64 | #include "params.h" |
ff28a94d | 65 | #include "tree-inline.h" |
6946b3f7 | 66 | #include "value-prof.h" |
8e9055ae | 67 | #include "tree-ssa-live.h" |
78bca40d | 68 | #include "tree-outof-ssa.h" |
7d776ee2 | 69 | #include "cfgloop.h" |
2b21299c | 70 | #include "insn-attr.h" /* For INSN_SCHEDULING. */ |
314e6352 ML |
71 | #include "stringpool.h" |
72 | #include "attribs.h" | |
f3ddd692 | 73 | #include "asan.h" |
4484a35a | 74 | #include "tree-ssa-address.h" |
862d0b35 | 75 | #include "output.h" |
9b2b7279 | 76 | #include "builtins.h" |
d5e254e1 IE |
77 | #include "tree-chkp.h" |
78 | #include "rtl-chkp.h" | |
726a989a | 79 | |
8a6ce562 JBG |
80 | /* Some systems use __main in a way incompatible with its use in gcc, in these |
81 | cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to | |
82 | give the same symbol without quotes for an alternative entry point. You | |
83 | must define both, or neither. */ | |
84 | #ifndef NAME__MAIN | |
85 | #define NAME__MAIN "__main" | |
86 | #endif | |
87 | ||
4e3825db MM |
88 | /* This variable holds information helping the rewriting of SSA trees |
89 | into RTL. */ | |
90 | struct ssaexpand SA; | |
91 | ||
a5883ba0 MM |
92 | /* This variable holds the currently expanded gimple statement for purposes |
93 | of comminucating the profile info to the builtin expanders. */ | |
355fe088 | 94 | gimple *currently_expanding_gimple_stmt; |
a5883ba0 | 95 | |
ddb555ed JJ |
96 | static rtx expand_debug_expr (tree); |
97 | ||
1f9ceff1 AO |
98 | static bool defer_stack_allocation (tree, bool); |
99 | ||
f11a7b6d AO |
100 | static void record_alignment_for_reg_var (unsigned int); |
101 | ||
726a989a RB |
102 | /* Return an expression tree corresponding to the RHS of GIMPLE |
103 | statement STMT. */ | |
104 | ||
105 | tree | |
355fe088 | 106 | gimple_assign_rhs_to_tree (gimple *stmt) |
726a989a RB |
107 | { |
108 | tree t; | |
82d6e6fc | 109 | enum gimple_rhs_class grhs_class; |
b8698a0f | 110 | |
82d6e6fc | 111 | grhs_class = get_gimple_rhs_class (gimple_expr_code (stmt)); |
726a989a | 112 | |
0354c0c7 BS |
113 | if (grhs_class == GIMPLE_TERNARY_RHS) |
114 | t = build3 (gimple_assign_rhs_code (stmt), | |
115 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
116 | gimple_assign_rhs1 (stmt), | |
117 | gimple_assign_rhs2 (stmt), | |
118 | gimple_assign_rhs3 (stmt)); | |
119 | else if (grhs_class == GIMPLE_BINARY_RHS) | |
726a989a RB |
120 | t = build2 (gimple_assign_rhs_code (stmt), |
121 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
122 | gimple_assign_rhs1 (stmt), | |
123 | gimple_assign_rhs2 (stmt)); | |
82d6e6fc | 124 | else if (grhs_class == GIMPLE_UNARY_RHS) |
726a989a RB |
125 | t = build1 (gimple_assign_rhs_code (stmt), |
126 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
127 | gimple_assign_rhs1 (stmt)); | |
82d6e6fc | 128 | else if (grhs_class == GIMPLE_SINGLE_RHS) |
b5b8b0ac AO |
129 | { |
130 | t = gimple_assign_rhs1 (stmt); | |
131 | /* Avoid modifying this tree in place below. */ | |
d0ed412a JJ |
132 | if ((gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (t) |
133 | && gimple_location (stmt) != EXPR_LOCATION (t)) | |
134 | || (gimple_block (stmt) | |
135 | && currently_expanding_to_rtl | |
5368224f | 136 | && EXPR_P (t))) |
b5b8b0ac AO |
137 | t = copy_node (t); |
138 | } | |
726a989a RB |
139 | else |
140 | gcc_unreachable (); | |
141 | ||
f5045c96 AM |
142 | if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (t)) |
143 | SET_EXPR_LOCATION (t, gimple_location (stmt)); | |
144 | ||
726a989a RB |
145 | return t; |
146 | } | |
147 | ||
726a989a | 148 | |
1f6d3a08 RH |
149 | #ifndef STACK_ALIGNMENT_NEEDED |
150 | #define STACK_ALIGNMENT_NEEDED 1 | |
151 | #endif | |
152 | ||
4e3825db MM |
153 | #define SSAVAR(x) (TREE_CODE (x) == SSA_NAME ? SSA_NAME_VAR (x) : x) |
154 | ||
1f9ceff1 AO |
155 | /* Choose either CUR or NEXT as the leader DECL for a partition. |
156 | Prefer ignored decls, to simplify debug dumps and reduce ambiguity | |
157 | out of the same user variable being in multiple partitions (this is | |
158 | less likely for compiler-introduced temps). */ | |
159 | ||
160 | static tree | |
161 | leader_merge (tree cur, tree next) | |
162 | { | |
163 | if (cur == NULL || cur == next) | |
164 | return next; | |
165 | ||
166 | if (DECL_P (cur) && DECL_IGNORED_P (cur)) | |
167 | return cur; | |
168 | ||
169 | if (DECL_P (next) && DECL_IGNORED_P (next)) | |
170 | return next; | |
171 | ||
172 | return cur; | |
173 | } | |
174 | ||
4e3825db MM |
175 | /* Associate declaration T with storage space X. If T is no |
176 | SSA name this is exactly SET_DECL_RTL, otherwise make the | |
177 | partition of T associated with X. */ | |
178 | static inline void | |
179 | set_rtl (tree t, rtx x) | |
180 | { | |
f11a7b6d AO |
181 | gcc_checking_assert (!x |
182 | || !(TREE_CODE (t) == SSA_NAME || is_gimple_reg (t)) | |
183 | || (use_register_for_decl (t) | |
184 | ? (REG_P (x) | |
185 | || (GET_CODE (x) == CONCAT | |
186 | && (REG_P (XEXP (x, 0)) | |
187 | || SUBREG_P (XEXP (x, 0))) | |
188 | && (REG_P (XEXP (x, 1)) | |
189 | || SUBREG_P (XEXP (x, 1)))) | |
058c6384 EB |
190 | /* We need to accept PARALLELs for RESUT_DECLs |
191 | because of vector types with BLKmode returned | |
192 | in multiple registers, but they are supposed | |
193 | to be uncoalesced. */ | |
f11a7b6d AO |
194 | || (GET_CODE (x) == PARALLEL |
195 | && SSAVAR (t) | |
196 | && TREE_CODE (SSAVAR (t)) == RESULT_DECL | |
058c6384 EB |
197 | && (GET_MODE (x) == BLKmode |
198 | || !flag_tree_coalesce_vars))) | |
f11a7b6d AO |
199 | : (MEM_P (x) || x == pc_rtx |
200 | || (GET_CODE (x) == CONCAT | |
201 | && MEM_P (XEXP (x, 0)) | |
202 | && MEM_P (XEXP (x, 1)))))); | |
203 | /* Check that the RTL for SSA_NAMEs and gimple-reg PARM_DECLs and | |
204 | RESULT_DECLs has the expected mode. For memory, we accept | |
205 | unpromoted modes, since that's what we're likely to get. For | |
206 | PARM_DECLs and RESULT_DECLs, we'll have been called by | |
207 | set_parm_rtl, which will give us the default def, so we don't | |
208 | have to compute it ourselves. For RESULT_DECLs, we accept mode | |
21fc3950 EB |
209 | mismatches too, as long as we have BLKmode or are not coalescing |
210 | across variables, so that we don't reject BLKmode PARALLELs or | |
211 | unpromoted REGs. */ | |
f11a7b6d | 212 | gcc_checking_assert (!x || x == pc_rtx || TREE_CODE (t) != SSA_NAME |
21fc3950 EB |
213 | || (SSAVAR (t) |
214 | && TREE_CODE (SSAVAR (t)) == RESULT_DECL | |
215 | && (promote_ssa_mode (t, NULL) == BLKmode | |
216 | || !flag_tree_coalesce_vars)) | |
f11a7b6d AO |
217 | || !use_register_for_decl (t) |
218 | || GET_MODE (x) == promote_ssa_mode (t, NULL)); | |
219 | ||
220 | if (x) | |
1f9ceff1 AO |
221 | { |
222 | bool skip = false; | |
223 | tree cur = NULL_TREE; | |
f11a7b6d AO |
224 | rtx xm = x; |
225 | ||
226 | retry: | |
227 | if (MEM_P (xm)) | |
228 | cur = MEM_EXPR (xm); | |
229 | else if (REG_P (xm)) | |
230 | cur = REG_EXPR (xm); | |
231 | else if (SUBREG_P (xm)) | |
232 | { | |
233 | gcc_assert (subreg_lowpart_p (xm)); | |
234 | xm = SUBREG_REG (xm); | |
235 | goto retry; | |
236 | } | |
237 | else if (GET_CODE (xm) == CONCAT) | |
238 | { | |
239 | xm = XEXP (xm, 0); | |
240 | goto retry; | |
241 | } | |
242 | else if (GET_CODE (xm) == PARALLEL) | |
243 | { | |
244 | xm = XVECEXP (xm, 0, 0); | |
245 | gcc_assert (GET_CODE (xm) == EXPR_LIST); | |
246 | xm = XEXP (xm, 0); | |
247 | goto retry; | |
248 | } | |
249 | else if (xm == pc_rtx) | |
1f9ceff1 AO |
250 | skip = true; |
251 | else | |
252 | gcc_unreachable (); | |
253 | ||
f11a7b6d | 254 | tree next = skip ? cur : leader_merge (cur, SSAVAR (t) ? SSAVAR (t) : t); |
1f9ceff1 AO |
255 | |
256 | if (cur != next) | |
257 | { | |
258 | if (MEM_P (x)) | |
f11a7b6d AO |
259 | set_mem_attributes (x, |
260 | next && TREE_CODE (next) == SSA_NAME | |
261 | ? TREE_TYPE (next) | |
262 | : next, true); | |
1f9ceff1 AO |
263 | else |
264 | set_reg_attrs_for_decl_rtl (next, x); | |
265 | } | |
266 | } | |
267 | ||
4e3825db MM |
268 | if (TREE_CODE (t) == SSA_NAME) |
269 | { | |
1f9ceff1 AO |
270 | int part = var_to_partition (SA.map, t); |
271 | if (part != NO_PARTITION) | |
272 | { | |
273 | if (SA.partition_to_pseudo[part]) | |
274 | gcc_assert (SA.partition_to_pseudo[part] == x); | |
275 | else if (x != pc_rtx) | |
276 | SA.partition_to_pseudo[part] = x; | |
277 | } | |
278 | /* For the benefit of debug information at -O0 (where | |
279 | vartracking doesn't run) record the place also in the base | |
f11a7b6d AO |
280 | DECL. For PARMs and RESULTs, do so only when setting the |
281 | default def. */ | |
282 | if (x && x != pc_rtx && SSA_NAME_VAR (t) | |
283 | && (VAR_P (SSA_NAME_VAR (t)) | |
284 | || SSA_NAME_IS_DEFAULT_DEF (t))) | |
eb7adebc MM |
285 | { |
286 | tree var = SSA_NAME_VAR (t); | |
287 | /* If we don't yet have something recorded, just record it now. */ | |
288 | if (!DECL_RTL_SET_P (var)) | |
289 | SET_DECL_RTL (var, x); | |
47598145 | 290 | /* If we have it set already to "multiple places" don't |
eb7adebc MM |
291 | change this. */ |
292 | else if (DECL_RTL (var) == pc_rtx) | |
293 | ; | |
294 | /* If we have something recorded and it's not the same place | |
295 | as we want to record now, we have multiple partitions for the | |
296 | same base variable, with different places. We can't just | |
297 | randomly chose one, hence we have to say that we don't know. | |
298 | This only happens with optimization, and there var-tracking | |
299 | will figure out the right thing. */ | |
300 | else if (DECL_RTL (var) != x) | |
301 | SET_DECL_RTL (var, pc_rtx); | |
302 | } | |
4e3825db MM |
303 | } |
304 | else | |
305 | SET_DECL_RTL (t, x); | |
306 | } | |
1f6d3a08 RH |
307 | |
308 | /* This structure holds data relevant to one variable that will be | |
309 | placed in a stack slot. */ | |
310 | struct stack_var | |
311 | { | |
312 | /* The Variable. */ | |
313 | tree decl; | |
314 | ||
1f6d3a08 RH |
315 | /* Initially, the size of the variable. Later, the size of the partition, |
316 | if this variable becomes it's partition's representative. */ | |
317 | HOST_WIDE_INT size; | |
318 | ||
319 | /* The *byte* alignment required for this variable. Or as, with the | |
320 | size, the alignment for this partition. */ | |
321 | unsigned int alignb; | |
322 | ||
323 | /* The partition representative. */ | |
324 | size_t representative; | |
325 | ||
326 | /* The next stack variable in the partition, or EOC. */ | |
327 | size_t next; | |
2bdbbe94 MM |
328 | |
329 | /* The numbers of conflicting stack variables. */ | |
330 | bitmap conflicts; | |
1f6d3a08 RH |
331 | }; |
332 | ||
333 | #define EOC ((size_t)-1) | |
334 | ||
335 | /* We have an array of such objects while deciding allocation. */ | |
336 | static struct stack_var *stack_vars; | |
337 | static size_t stack_vars_alloc; | |
338 | static size_t stack_vars_num; | |
39c8aaa4 | 339 | static hash_map<tree, size_t> *decl_to_stack_part; |
1f6d3a08 | 340 | |
3f9b14ff SB |
341 | /* Conflict bitmaps go on this obstack. This allows us to destroy |
342 | all of them in one big sweep. */ | |
343 | static bitmap_obstack stack_var_bitmap_obstack; | |
344 | ||
fa10beec | 345 | /* An array of indices such that stack_vars[stack_vars_sorted[i]].size |
1f6d3a08 RH |
346 | is non-decreasing. */ |
347 | static size_t *stack_vars_sorted; | |
348 | ||
1f6d3a08 RH |
349 | /* The phase of the stack frame. This is the known misalignment of |
350 | virtual_stack_vars_rtx from PREFERRED_STACK_BOUNDARY. That is, | |
351 | (frame_offset+frame_phase) % PREFERRED_STACK_BOUNDARY == 0. */ | |
352 | static int frame_phase; | |
353 | ||
7d69de61 RH |
354 | /* Used during expand_used_vars to remember if we saw any decls for |
355 | which we'd like to enable stack smashing protection. */ | |
356 | static bool has_protected_decls; | |
357 | ||
358 | /* Used during expand_used_vars. Remember if we say a character buffer | |
359 | smaller than our cutoff threshold. Used for -Wstack-protector. */ | |
360 | static bool has_short_buffer; | |
1f6d3a08 | 361 | |
6f197850 | 362 | /* Compute the byte alignment to use for DECL. Ignore alignment |
765c3e8f L |
363 | we can't do with expected alignment of the stack boundary. */ |
364 | ||
365 | static unsigned int | |
6f197850 | 366 | align_local_variable (tree decl) |
765c3e8f | 367 | { |
1f9ceff1 AO |
368 | unsigned int align; |
369 | ||
370 | if (TREE_CODE (decl) == SSA_NAME) | |
371 | align = TYPE_ALIGN (TREE_TYPE (decl)); | |
372 | else | |
373 | { | |
374 | align = LOCAL_DECL_ALIGNMENT (decl); | |
fe37c7af | 375 | SET_DECL_ALIGN (decl, align); |
1f9ceff1 | 376 | } |
1f6d3a08 RH |
377 | return align / BITS_PER_UNIT; |
378 | } | |
379 | ||
435be747 MO |
380 | /* Align given offset BASE with ALIGN. Truncate up if ALIGN_UP is true, |
381 | down otherwise. Return truncated BASE value. */ | |
382 | ||
383 | static inline unsigned HOST_WIDE_INT | |
384 | align_base (HOST_WIDE_INT base, unsigned HOST_WIDE_INT align, bool align_up) | |
385 | { | |
386 | return align_up ? (base + align - 1) & -align : base & -align; | |
387 | } | |
388 | ||
1f6d3a08 RH |
389 | /* Allocate SIZE bytes at byte alignment ALIGN from the stack frame. |
390 | Return the frame offset. */ | |
391 | ||
392 | static HOST_WIDE_INT | |
3a42502d | 393 | alloc_stack_frame_space (HOST_WIDE_INT size, unsigned HOST_WIDE_INT align) |
1f6d3a08 RH |
394 | { |
395 | HOST_WIDE_INT offset, new_frame_offset; | |
396 | ||
1f6d3a08 RH |
397 | if (FRAME_GROWS_DOWNWARD) |
398 | { | |
435be747 MO |
399 | new_frame_offset |
400 | = align_base (frame_offset - frame_phase - size, | |
401 | align, false) + frame_phase; | |
1f6d3a08 RH |
402 | offset = new_frame_offset; |
403 | } | |
404 | else | |
405 | { | |
435be747 MO |
406 | new_frame_offset |
407 | = align_base (frame_offset - frame_phase, align, true) + frame_phase; | |
1f6d3a08 RH |
408 | offset = new_frame_offset; |
409 | new_frame_offset += size; | |
410 | } | |
411 | frame_offset = new_frame_offset; | |
412 | ||
9fb798d7 EB |
413 | if (frame_offset_overflow (frame_offset, cfun->decl)) |
414 | frame_offset = offset = 0; | |
415 | ||
1f6d3a08 RH |
416 | return offset; |
417 | } | |
418 | ||
419 | /* Accumulate DECL into STACK_VARS. */ | |
420 | ||
421 | static void | |
422 | add_stack_var (tree decl) | |
423 | { | |
533f611a RH |
424 | struct stack_var *v; |
425 | ||
1f6d3a08 RH |
426 | if (stack_vars_num >= stack_vars_alloc) |
427 | { | |
428 | if (stack_vars_alloc) | |
429 | stack_vars_alloc = stack_vars_alloc * 3 / 2; | |
430 | else | |
431 | stack_vars_alloc = 32; | |
432 | stack_vars | |
433 | = XRESIZEVEC (struct stack_var, stack_vars, stack_vars_alloc); | |
434 | } | |
47598145 | 435 | if (!decl_to_stack_part) |
39c8aaa4 | 436 | decl_to_stack_part = new hash_map<tree, size_t>; |
47598145 | 437 | |
533f611a | 438 | v = &stack_vars[stack_vars_num]; |
39c8aaa4 | 439 | decl_to_stack_part->put (decl, stack_vars_num); |
533f611a RH |
440 | |
441 | v->decl = decl; | |
1f9ceff1 AO |
442 | tree size = TREE_CODE (decl) == SSA_NAME |
443 | ? TYPE_SIZE_UNIT (TREE_TYPE (decl)) | |
444 | : DECL_SIZE_UNIT (decl); | |
445 | v->size = tree_to_uhwi (size); | |
533f611a RH |
446 | /* Ensure that all variables have size, so that &a != &b for any two |
447 | variables that are simultaneously live. */ | |
448 | if (v->size == 0) | |
449 | v->size = 1; | |
1f9ceff1 | 450 | v->alignb = align_local_variable (decl); |
13868f40 EB |
451 | /* An alignment of zero can mightily confuse us later. */ |
452 | gcc_assert (v->alignb != 0); | |
1f6d3a08 RH |
453 | |
454 | /* All variables are initially in their own partition. */ | |
533f611a RH |
455 | v->representative = stack_vars_num; |
456 | v->next = EOC; | |
1f6d3a08 | 457 | |
2bdbbe94 | 458 | /* All variables initially conflict with no other. */ |
533f611a | 459 | v->conflicts = NULL; |
2bdbbe94 | 460 | |
1f6d3a08 | 461 | /* Ensure that this decl doesn't get put onto the list twice. */ |
4e3825db | 462 | set_rtl (decl, pc_rtx); |
1f6d3a08 RH |
463 | |
464 | stack_vars_num++; | |
465 | } | |
466 | ||
1f6d3a08 RH |
467 | /* Make the decls associated with luid's X and Y conflict. */ |
468 | ||
469 | static void | |
470 | add_stack_var_conflict (size_t x, size_t y) | |
471 | { | |
2bdbbe94 MM |
472 | struct stack_var *a = &stack_vars[x]; |
473 | struct stack_var *b = &stack_vars[y]; | |
474 | if (!a->conflicts) | |
3f9b14ff | 475 | a->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
2bdbbe94 | 476 | if (!b->conflicts) |
3f9b14ff | 477 | b->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
2bdbbe94 MM |
478 | bitmap_set_bit (a->conflicts, y); |
479 | bitmap_set_bit (b->conflicts, x); | |
1f6d3a08 RH |
480 | } |
481 | ||
482 | /* Check whether the decls associated with luid's X and Y conflict. */ | |
483 | ||
484 | static bool | |
485 | stack_var_conflict_p (size_t x, size_t y) | |
486 | { | |
2bdbbe94 MM |
487 | struct stack_var *a = &stack_vars[x]; |
488 | struct stack_var *b = &stack_vars[y]; | |
47598145 MM |
489 | if (x == y) |
490 | return false; | |
491 | /* Partitions containing an SSA name result from gimple registers | |
492 | with things like unsupported modes. They are top-level and | |
493 | hence conflict with everything else. */ | |
494 | if (TREE_CODE (a->decl) == SSA_NAME || TREE_CODE (b->decl) == SSA_NAME) | |
495 | return true; | |
496 | ||
2bdbbe94 MM |
497 | if (!a->conflicts || !b->conflicts) |
498 | return false; | |
499 | return bitmap_bit_p (a->conflicts, y); | |
1f6d3a08 | 500 | } |
b8698a0f | 501 | |
47598145 MM |
502 | /* Callback for walk_stmt_ops. If OP is a decl touched by add_stack_var |
503 | enter its partition number into bitmap DATA. */ | |
504 | ||
505 | static bool | |
355fe088 | 506 | visit_op (gimple *, tree op, tree, void *data) |
47598145 MM |
507 | { |
508 | bitmap active = (bitmap)data; | |
509 | op = get_base_address (op); | |
510 | if (op | |
511 | && DECL_P (op) | |
512 | && DECL_RTL_IF_SET (op) == pc_rtx) | |
513 | { | |
39c8aaa4 | 514 | size_t *v = decl_to_stack_part->get (op); |
47598145 MM |
515 | if (v) |
516 | bitmap_set_bit (active, *v); | |
517 | } | |
518 | return false; | |
519 | } | |
520 | ||
521 | /* Callback for walk_stmt_ops. If OP is a decl touched by add_stack_var | |
522 | record conflicts between it and all currently active other partitions | |
523 | from bitmap DATA. */ | |
524 | ||
525 | static bool | |
355fe088 | 526 | visit_conflict (gimple *, tree op, tree, void *data) |
47598145 MM |
527 | { |
528 | bitmap active = (bitmap)data; | |
529 | op = get_base_address (op); | |
530 | if (op | |
531 | && DECL_P (op) | |
532 | && DECL_RTL_IF_SET (op) == pc_rtx) | |
533 | { | |
39c8aaa4 | 534 | size_t *v = decl_to_stack_part->get (op); |
47598145 MM |
535 | if (v && bitmap_set_bit (active, *v)) |
536 | { | |
537 | size_t num = *v; | |
538 | bitmap_iterator bi; | |
539 | unsigned i; | |
540 | gcc_assert (num < stack_vars_num); | |
541 | EXECUTE_IF_SET_IN_BITMAP (active, 0, i, bi) | |
542 | add_stack_var_conflict (num, i); | |
543 | } | |
544 | } | |
545 | return false; | |
546 | } | |
547 | ||
548 | /* Helper routine for add_scope_conflicts, calculating the active partitions | |
549 | at the end of BB, leaving the result in WORK. We're called to generate | |
81bfd197 MM |
550 | conflicts when FOR_CONFLICT is true, otherwise we're just tracking |
551 | liveness. */ | |
47598145 MM |
552 | |
553 | static void | |
81bfd197 | 554 | add_scope_conflicts_1 (basic_block bb, bitmap work, bool for_conflict) |
47598145 MM |
555 | { |
556 | edge e; | |
557 | edge_iterator ei; | |
558 | gimple_stmt_iterator gsi; | |
9f1363cd | 559 | walk_stmt_load_store_addr_fn visit; |
47598145 MM |
560 | |
561 | bitmap_clear (work); | |
562 | FOR_EACH_EDGE (e, ei, bb->preds) | |
563 | bitmap_ior_into (work, (bitmap)e->src->aux); | |
564 | ||
ea85edfe | 565 | visit = visit_op; |
47598145 MM |
566 | |
567 | for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
568 | { | |
355fe088 | 569 | gimple *stmt = gsi_stmt (gsi); |
ea85edfe | 570 | walk_stmt_load_store_addr_ops (stmt, work, NULL, NULL, visit); |
47598145 | 571 | } |
ea85edfe | 572 | for (gsi = gsi_after_labels (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
47598145 | 573 | { |
355fe088 | 574 | gimple *stmt = gsi_stmt (gsi); |
47598145 MM |
575 | |
576 | if (gimple_clobber_p (stmt)) | |
577 | { | |
578 | tree lhs = gimple_assign_lhs (stmt); | |
579 | size_t *v; | |
580 | /* Nested function lowering might introduce LHSs | |
581 | that are COMPONENT_REFs. */ | |
8813a647 | 582 | if (!VAR_P (lhs)) |
47598145 MM |
583 | continue; |
584 | if (DECL_RTL_IF_SET (lhs) == pc_rtx | |
39c8aaa4 | 585 | && (v = decl_to_stack_part->get (lhs))) |
47598145 MM |
586 | bitmap_clear_bit (work, *v); |
587 | } | |
588 | else if (!is_gimple_debug (stmt)) | |
ea85edfe | 589 | { |
81bfd197 | 590 | if (for_conflict |
ea85edfe JJ |
591 | && visit == visit_op) |
592 | { | |
593 | /* If this is the first real instruction in this BB we need | |
88d599dc MM |
594 | to add conflicts for everything live at this point now. |
595 | Unlike classical liveness for named objects we can't | |
ea85edfe JJ |
596 | rely on seeing a def/use of the names we're interested in. |
597 | There might merely be indirect loads/stores. We'd not add any | |
81bfd197 | 598 | conflicts for such partitions. */ |
ea85edfe JJ |
599 | bitmap_iterator bi; |
600 | unsigned i; | |
81bfd197 | 601 | EXECUTE_IF_SET_IN_BITMAP (work, 0, i, bi) |
ea85edfe | 602 | { |
9b44f5d9 MM |
603 | struct stack_var *a = &stack_vars[i]; |
604 | if (!a->conflicts) | |
3f9b14ff | 605 | a->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
9b44f5d9 | 606 | bitmap_ior_into (a->conflicts, work); |
ea85edfe JJ |
607 | } |
608 | visit = visit_conflict; | |
609 | } | |
610 | walk_stmt_load_store_addr_ops (stmt, work, visit, visit, visit); | |
611 | } | |
47598145 MM |
612 | } |
613 | } | |
614 | ||
615 | /* Generate stack partition conflicts between all partitions that are | |
616 | simultaneously live. */ | |
617 | ||
618 | static void | |
619 | add_scope_conflicts (void) | |
620 | { | |
621 | basic_block bb; | |
622 | bool changed; | |
623 | bitmap work = BITMAP_ALLOC (NULL); | |
9b44f5d9 MM |
624 | int *rpo; |
625 | int n_bbs; | |
47598145 | 626 | |
88d599dc | 627 | /* We approximate the live range of a stack variable by taking the first |
47598145 MM |
628 | mention of its name as starting point(s), and by the end-of-scope |
629 | death clobber added by gimplify as ending point(s) of the range. | |
630 | This overapproximates in the case we for instance moved an address-taken | |
631 | operation upward, without also moving a dereference to it upwards. | |
632 | But it's conservatively correct as a variable never can hold values | |
633 | before its name is mentioned at least once. | |
634 | ||
88d599dc | 635 | We then do a mostly classical bitmap liveness algorithm. */ |
47598145 | 636 | |
04a90bec | 637 | FOR_ALL_BB_FN (bb, cfun) |
3f9b14ff | 638 | bb->aux = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
47598145 | 639 | |
8b1c6fd7 | 640 | rpo = XNEWVEC (int, last_basic_block_for_fn (cfun)); |
9b44f5d9 MM |
641 | n_bbs = pre_and_rev_post_order_compute (NULL, rpo, false); |
642 | ||
47598145 MM |
643 | changed = true; |
644 | while (changed) | |
645 | { | |
9b44f5d9 | 646 | int i; |
47598145 | 647 | changed = false; |
9b44f5d9 | 648 | for (i = 0; i < n_bbs; i++) |
47598145 | 649 | { |
9b44f5d9 | 650 | bitmap active; |
06e28de2 | 651 | bb = BASIC_BLOCK_FOR_FN (cfun, rpo[i]); |
9b44f5d9 | 652 | active = (bitmap)bb->aux; |
81bfd197 | 653 | add_scope_conflicts_1 (bb, work, false); |
47598145 MM |
654 | if (bitmap_ior_into (active, work)) |
655 | changed = true; | |
656 | } | |
657 | } | |
658 | ||
11cd3bed | 659 | FOR_EACH_BB_FN (bb, cfun) |
81bfd197 | 660 | add_scope_conflicts_1 (bb, work, true); |
47598145 | 661 | |
9b44f5d9 | 662 | free (rpo); |
47598145 | 663 | BITMAP_FREE (work); |
04a90bec | 664 | FOR_ALL_BB_FN (bb, cfun) |
47598145 MM |
665 | BITMAP_FREE (bb->aux); |
666 | } | |
667 | ||
1f6d3a08 | 668 | /* A subroutine of partition_stack_vars. A comparison function for qsort, |
3a42502d | 669 | sorting an array of indices by the properties of the object. */ |
1f6d3a08 RH |
670 | |
671 | static int | |
3a42502d | 672 | stack_var_cmp (const void *a, const void *b) |
1f6d3a08 | 673 | { |
3a42502d RH |
674 | size_t ia = *(const size_t *)a; |
675 | size_t ib = *(const size_t *)b; | |
676 | unsigned int aligna = stack_vars[ia].alignb; | |
677 | unsigned int alignb = stack_vars[ib].alignb; | |
678 | HOST_WIDE_INT sizea = stack_vars[ia].size; | |
679 | HOST_WIDE_INT sizeb = stack_vars[ib].size; | |
680 | tree decla = stack_vars[ia].decl; | |
681 | tree declb = stack_vars[ib].decl; | |
682 | bool largea, largeb; | |
4e3825db | 683 | unsigned int uida, uidb; |
1f6d3a08 | 684 | |
3a42502d RH |
685 | /* Primary compare on "large" alignment. Large comes first. */ |
686 | largea = (aligna * BITS_PER_UNIT > MAX_SUPPORTED_STACK_ALIGNMENT); | |
687 | largeb = (alignb * BITS_PER_UNIT > MAX_SUPPORTED_STACK_ALIGNMENT); | |
688 | if (largea != largeb) | |
689 | return (int)largeb - (int)largea; | |
690 | ||
691 | /* Secondary compare on size, decreasing */ | |
3a42502d | 692 | if (sizea > sizeb) |
6ddfda8a ER |
693 | return -1; |
694 | if (sizea < sizeb) | |
1f6d3a08 | 695 | return 1; |
3a42502d RH |
696 | |
697 | /* Tertiary compare on true alignment, decreasing. */ | |
698 | if (aligna < alignb) | |
699 | return -1; | |
700 | if (aligna > alignb) | |
701 | return 1; | |
702 | ||
703 | /* Final compare on ID for sort stability, increasing. | |
704 | Two SSA names are compared by their version, SSA names come before | |
705 | non-SSA names, and two normal decls are compared by their DECL_UID. */ | |
4e3825db MM |
706 | if (TREE_CODE (decla) == SSA_NAME) |
707 | { | |
708 | if (TREE_CODE (declb) == SSA_NAME) | |
709 | uida = SSA_NAME_VERSION (decla), uidb = SSA_NAME_VERSION (declb); | |
710 | else | |
711 | return -1; | |
712 | } | |
713 | else if (TREE_CODE (declb) == SSA_NAME) | |
714 | return 1; | |
715 | else | |
716 | uida = DECL_UID (decla), uidb = DECL_UID (declb); | |
79f802f5 | 717 | if (uida < uidb) |
79f802f5 | 718 | return 1; |
3a42502d RH |
719 | if (uida > uidb) |
720 | return -1; | |
1f6d3a08 RH |
721 | return 0; |
722 | } | |
723 | ||
0ef08bc5 | 724 | struct part_traits : unbounded_int_hashmap_traits <size_t, bitmap> {}; |
39c8aaa4 | 725 | typedef hash_map<size_t, bitmap, part_traits> part_hashmap; |
55b34b5f RG |
726 | |
727 | /* If the points-to solution *PI points to variables that are in a partition | |
728 | together with other variables add all partition members to the pointed-to | |
729 | variables bitmap. */ | |
730 | ||
731 | static void | |
732 | add_partitioned_vars_to_ptset (struct pt_solution *pt, | |
39c8aaa4 | 733 | part_hashmap *decls_to_partitions, |
6e2830c3 | 734 | hash_set<bitmap> *visited, bitmap temp) |
55b34b5f RG |
735 | { |
736 | bitmap_iterator bi; | |
737 | unsigned i; | |
738 | bitmap *part; | |
739 | ||
740 | if (pt->anything | |
741 | || pt->vars == NULL | |
742 | /* The pointed-to vars bitmap is shared, it is enough to | |
743 | visit it once. */ | |
6e2830c3 | 744 | || visited->add (pt->vars)) |
55b34b5f RG |
745 | return; |
746 | ||
747 | bitmap_clear (temp); | |
748 | ||
749 | /* By using a temporary bitmap to store all members of the partitions | |
750 | we have to add we make sure to visit each of the partitions only | |
751 | once. */ | |
752 | EXECUTE_IF_SET_IN_BITMAP (pt->vars, 0, i, bi) | |
753 | if ((!temp | |
754 | || !bitmap_bit_p (temp, i)) | |
39c8aaa4 | 755 | && (part = decls_to_partitions->get (i))) |
55b34b5f RG |
756 | bitmap_ior_into (temp, *part); |
757 | if (!bitmap_empty_p (temp)) | |
758 | bitmap_ior_into (pt->vars, temp); | |
759 | } | |
760 | ||
761 | /* Update points-to sets based on partition info, so we can use them on RTL. | |
762 | The bitmaps representing stack partitions will be saved until expand, | |
763 | where partitioned decls used as bases in memory expressions will be | |
764 | rewritten. */ | |
765 | ||
766 | static void | |
767 | update_alias_info_with_stack_vars (void) | |
768 | { | |
39c8aaa4 | 769 | part_hashmap *decls_to_partitions = NULL; |
55b34b5f RG |
770 | size_t i, j; |
771 | tree var = NULL_TREE; | |
772 | ||
773 | for (i = 0; i < stack_vars_num; i++) | |
774 | { | |
775 | bitmap part = NULL; | |
776 | tree name; | |
777 | struct ptr_info_def *pi; | |
778 | ||
779 | /* Not interested in partitions with single variable. */ | |
780 | if (stack_vars[i].representative != i | |
781 | || stack_vars[i].next == EOC) | |
782 | continue; | |
783 | ||
784 | if (!decls_to_partitions) | |
785 | { | |
39c8aaa4 TS |
786 | decls_to_partitions = new part_hashmap; |
787 | cfun->gimple_df->decls_to_pointers = new hash_map<tree, tree>; | |
55b34b5f RG |
788 | } |
789 | ||
790 | /* Create an SSA_NAME that points to the partition for use | |
791 | as base during alias-oracle queries on RTL for bases that | |
792 | have been partitioned. */ | |
793 | if (var == NULL_TREE) | |
b731b390 JJ |
794 | var = create_tmp_var (ptr_type_node); |
795 | name = make_ssa_name (var); | |
55b34b5f RG |
796 | |
797 | /* Create bitmaps representing partitions. They will be used for | |
798 | points-to sets later, so use GGC alloc. */ | |
799 | part = BITMAP_GGC_ALLOC (); | |
800 | for (j = i; j != EOC; j = stack_vars[j].next) | |
801 | { | |
802 | tree decl = stack_vars[j].decl; | |
25a6a873 | 803 | unsigned int uid = DECL_PT_UID (decl); |
55b34b5f | 804 | bitmap_set_bit (part, uid); |
39c8aaa4 TS |
805 | decls_to_partitions->put (uid, part); |
806 | cfun->gimple_df->decls_to_pointers->put (decl, name); | |
88d8330d EB |
807 | if (TREE_ADDRESSABLE (decl)) |
808 | TREE_ADDRESSABLE (name) = 1; | |
55b34b5f RG |
809 | } |
810 | ||
811 | /* Make the SSA name point to all partition members. */ | |
812 | pi = get_ptr_info (name); | |
d3553615 | 813 | pt_solution_set (&pi->pt, part, false); |
55b34b5f RG |
814 | } |
815 | ||
816 | /* Make all points-to sets that contain one member of a partition | |
817 | contain all members of the partition. */ | |
818 | if (decls_to_partitions) | |
819 | { | |
820 | unsigned i; | |
46aa019a | 821 | tree name; |
6e2830c3 | 822 | hash_set<bitmap> visited; |
3f9b14ff | 823 | bitmap temp = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
55b34b5f | 824 | |
46aa019a | 825 | FOR_EACH_SSA_NAME (i, name, cfun) |
55b34b5f | 826 | { |
55b34b5f RG |
827 | struct ptr_info_def *pi; |
828 | ||
46aa019a | 829 | if (POINTER_TYPE_P (TREE_TYPE (name)) |
55b34b5f RG |
830 | && ((pi = SSA_NAME_PTR_INFO (name)) != NULL)) |
831 | add_partitioned_vars_to_ptset (&pi->pt, decls_to_partitions, | |
6e2830c3 | 832 | &visited, temp); |
55b34b5f RG |
833 | } |
834 | ||
835 | add_partitioned_vars_to_ptset (&cfun->gimple_df->escaped, | |
6e2830c3 | 836 | decls_to_partitions, &visited, temp); |
55b34b5f | 837 | |
39c8aaa4 | 838 | delete decls_to_partitions; |
55b34b5f RG |
839 | BITMAP_FREE (temp); |
840 | } | |
841 | } | |
842 | ||
1f6d3a08 RH |
843 | /* A subroutine of partition_stack_vars. The UNION portion of a UNION/FIND |
844 | partitioning algorithm. Partitions A and B are known to be non-conflicting. | |
6ddfda8a | 845 | Merge them into a single partition A. */ |
1f6d3a08 RH |
846 | |
847 | static void | |
6ddfda8a | 848 | union_stack_vars (size_t a, size_t b) |
1f6d3a08 | 849 | { |
2bdbbe94 MM |
850 | struct stack_var *vb = &stack_vars[b]; |
851 | bitmap_iterator bi; | |
852 | unsigned u; | |
1f6d3a08 | 853 | |
6ddfda8a ER |
854 | gcc_assert (stack_vars[b].next == EOC); |
855 | /* Add B to A's partition. */ | |
856 | stack_vars[b].next = stack_vars[a].next; | |
857 | stack_vars[b].representative = a; | |
1f6d3a08 RH |
858 | stack_vars[a].next = b; |
859 | ||
860 | /* Update the required alignment of partition A to account for B. */ | |
861 | if (stack_vars[a].alignb < stack_vars[b].alignb) | |
862 | stack_vars[a].alignb = stack_vars[b].alignb; | |
863 | ||
864 | /* Update the interference graph and merge the conflicts. */ | |
2bdbbe94 MM |
865 | if (vb->conflicts) |
866 | { | |
867 | EXECUTE_IF_SET_IN_BITMAP (vb->conflicts, 0, u, bi) | |
868 | add_stack_var_conflict (a, stack_vars[u].representative); | |
869 | BITMAP_FREE (vb->conflicts); | |
870 | } | |
1f6d3a08 RH |
871 | } |
872 | ||
873 | /* A subroutine of expand_used_vars. Binpack the variables into | |
874 | partitions constrained by the interference graph. The overall | |
875 | algorithm used is as follows: | |
876 | ||
6ddfda8a | 877 | Sort the objects by size in descending order. |
1f6d3a08 RH |
878 | For each object A { |
879 | S = size(A) | |
880 | O = 0 | |
881 | loop { | |
882 | Look for the largest non-conflicting object B with size <= S. | |
883 | UNION (A, B) | |
1f6d3a08 RH |
884 | } |
885 | } | |
886 | */ | |
887 | ||
888 | static void | |
889 | partition_stack_vars (void) | |
890 | { | |
891 | size_t si, sj, n = stack_vars_num; | |
892 | ||
893 | stack_vars_sorted = XNEWVEC (size_t, stack_vars_num); | |
894 | for (si = 0; si < n; ++si) | |
895 | stack_vars_sorted[si] = si; | |
896 | ||
897 | if (n == 1) | |
898 | return; | |
899 | ||
3a42502d | 900 | qsort (stack_vars_sorted, n, sizeof (size_t), stack_var_cmp); |
1f6d3a08 | 901 | |
1f6d3a08 RH |
902 | for (si = 0; si < n; ++si) |
903 | { | |
904 | size_t i = stack_vars_sorted[si]; | |
3a42502d | 905 | unsigned int ialign = stack_vars[i].alignb; |
f3ddd692 | 906 | HOST_WIDE_INT isize = stack_vars[i].size; |
1f6d3a08 | 907 | |
6ddfda8a ER |
908 | /* Ignore objects that aren't partition representatives. If we |
909 | see a var that is not a partition representative, it must | |
910 | have been merged earlier. */ | |
911 | if (stack_vars[i].representative != i) | |
912 | continue; | |
913 | ||
914 | for (sj = si + 1; sj < n; ++sj) | |
1f6d3a08 RH |
915 | { |
916 | size_t j = stack_vars_sorted[sj]; | |
1f6d3a08 | 917 | unsigned int jalign = stack_vars[j].alignb; |
f3ddd692 | 918 | HOST_WIDE_INT jsize = stack_vars[j].size; |
1f6d3a08 RH |
919 | |
920 | /* Ignore objects that aren't partition representatives. */ | |
921 | if (stack_vars[j].representative != j) | |
922 | continue; | |
923 | ||
3a42502d RH |
924 | /* Do not mix objects of "small" (supported) alignment |
925 | and "large" (unsupported) alignment. */ | |
926 | if ((ialign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
927 | != (jalign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT)) | |
f3ddd692 JJ |
928 | break; |
929 | ||
930 | /* For Address Sanitizer do not mix objects with different | |
931 | sizes, as the shorter vars wouldn't be adequately protected. | |
932 | Don't do that for "large" (unsupported) alignment objects, | |
933 | those aren't protected anyway. */ | |
6dc4a604 ML |
934 | if ((asan_sanitize_stack_p ()) |
935 | && isize != jsize | |
f3ddd692 JJ |
936 | && ialign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) |
937 | break; | |
938 | ||
939 | /* Ignore conflicting objects. */ | |
940 | if (stack_var_conflict_p (i, j)) | |
3a42502d RH |
941 | continue; |
942 | ||
1f6d3a08 | 943 | /* UNION the objects, placing J at OFFSET. */ |
6ddfda8a | 944 | union_stack_vars (i, j); |
1f6d3a08 RH |
945 | } |
946 | } | |
55b34b5f | 947 | |
9b999dc5 | 948 | update_alias_info_with_stack_vars (); |
1f6d3a08 RH |
949 | } |
950 | ||
951 | /* A debugging aid for expand_used_vars. Dump the generated partitions. */ | |
952 | ||
953 | static void | |
954 | dump_stack_var_partition (void) | |
955 | { | |
956 | size_t si, i, j, n = stack_vars_num; | |
957 | ||
958 | for (si = 0; si < n; ++si) | |
959 | { | |
960 | i = stack_vars_sorted[si]; | |
961 | ||
962 | /* Skip variables that aren't partition representatives, for now. */ | |
963 | if (stack_vars[i].representative != i) | |
964 | continue; | |
965 | ||
966 | fprintf (dump_file, "Partition %lu: size " HOST_WIDE_INT_PRINT_DEC | |
967 | " align %u\n", (unsigned long) i, stack_vars[i].size, | |
968 | stack_vars[i].alignb); | |
969 | ||
970 | for (j = i; j != EOC; j = stack_vars[j].next) | |
971 | { | |
972 | fputc ('\t', dump_file); | |
973 | print_generic_expr (dump_file, stack_vars[j].decl, dump_flags); | |
1f6d3a08 | 974 | } |
6ddfda8a | 975 | fputc ('\n', dump_file); |
1f6d3a08 RH |
976 | } |
977 | } | |
978 | ||
3a42502d | 979 | /* Assign rtl to DECL at BASE + OFFSET. */ |
1f6d3a08 RH |
980 | |
981 | static void | |
3a42502d RH |
982 | expand_one_stack_var_at (tree decl, rtx base, unsigned base_align, |
983 | HOST_WIDE_INT offset) | |
1f6d3a08 | 984 | { |
3a42502d | 985 | unsigned align; |
1f6d3a08 | 986 | rtx x; |
c22cacf3 | 987 | |
1f6d3a08 RH |
988 | /* If this fails, we've overflowed the stack frame. Error nicely? */ |
989 | gcc_assert (offset == trunc_int_for_mode (offset, Pmode)); | |
990 | ||
0a81f074 | 991 | x = plus_constant (Pmode, base, offset); |
1f9ceff1 AO |
992 | x = gen_rtx_MEM (TREE_CODE (decl) == SSA_NAME |
993 | ? TYPE_MODE (TREE_TYPE (decl)) | |
994 | : DECL_MODE (SSAVAR (decl)), x); | |
1f6d3a08 | 995 | |
4e3825db MM |
996 | if (TREE_CODE (decl) != SSA_NAME) |
997 | { | |
998 | /* Set alignment we actually gave this decl if it isn't an SSA name. | |
999 | If it is we generate stack slots only accidentally so it isn't as | |
1000 | important, we'll simply use the alignment that is already set. */ | |
3a42502d RH |
1001 | if (base == virtual_stack_vars_rtx) |
1002 | offset -= frame_phase; | |
146ec50f | 1003 | align = least_bit_hwi (offset); |
4e3825db | 1004 | align *= BITS_PER_UNIT; |
3a42502d RH |
1005 | if (align == 0 || align > base_align) |
1006 | align = base_align; | |
1007 | ||
1008 | /* One would think that we could assert that we're not decreasing | |
1009 | alignment here, but (at least) the i386 port does exactly this | |
1010 | via the MINIMUM_ALIGNMENT hook. */ | |
4e3825db | 1011 | |
fe37c7af | 1012 | SET_DECL_ALIGN (decl, align); |
4e3825db MM |
1013 | DECL_USER_ALIGN (decl) = 0; |
1014 | } | |
1015 | ||
4e3825db | 1016 | set_rtl (decl, x); |
1f6d3a08 RH |
1017 | } |
1018 | ||
f3ddd692 JJ |
1019 | struct stack_vars_data |
1020 | { | |
1021 | /* Vector of offset pairs, always end of some padding followed | |
1022 | by start of the padding that needs Address Sanitizer protection. | |
1023 | The vector is in reversed, highest offset pairs come first. */ | |
06dc18b3 | 1024 | auto_vec<HOST_WIDE_INT> asan_vec; |
f3ddd692 JJ |
1025 | |
1026 | /* Vector of partition representative decls in between the paddings. */ | |
06dc18b3 | 1027 | auto_vec<tree> asan_decl_vec; |
e361382f JJ |
1028 | |
1029 | /* Base pseudo register for Address Sanitizer protected automatic vars. */ | |
1030 | rtx asan_base; | |
1031 | ||
1032 | /* Alignment needed for the Address Sanitizer protected automatic vars. */ | |
1033 | unsigned int asan_alignb; | |
f3ddd692 JJ |
1034 | }; |
1035 | ||
1f6d3a08 RH |
1036 | /* A subroutine of expand_used_vars. Give each partition representative |
1037 | a unique location within the stack frame. Update each partition member | |
1038 | with that location. */ | |
1039 | ||
1040 | static void | |
f3ddd692 | 1041 | expand_stack_vars (bool (*pred) (size_t), struct stack_vars_data *data) |
1f6d3a08 RH |
1042 | { |
1043 | size_t si, i, j, n = stack_vars_num; | |
3a42502d RH |
1044 | HOST_WIDE_INT large_size = 0, large_alloc = 0; |
1045 | rtx large_base = NULL; | |
1046 | unsigned large_align = 0; | |
7072df0a | 1047 | bool large_allocation_done = false; |
3a42502d RH |
1048 | tree decl; |
1049 | ||
1050 | /* Determine if there are any variables requiring "large" alignment. | |
1051 | Since these are dynamically allocated, we only process these if | |
1052 | no predicate involved. */ | |
1053 | large_align = stack_vars[stack_vars_sorted[0]].alignb * BITS_PER_UNIT; | |
1054 | if (pred == NULL && large_align > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1055 | { | |
1056 | /* Find the total size of these variables. */ | |
1057 | for (si = 0; si < n; ++si) | |
1058 | { | |
1059 | unsigned alignb; | |
1060 | ||
1061 | i = stack_vars_sorted[si]; | |
1062 | alignb = stack_vars[i].alignb; | |
1063 | ||
a8eeec27 SE |
1064 | /* All "large" alignment decls come before all "small" alignment |
1065 | decls, but "large" alignment decls are not sorted based on | |
1066 | their alignment. Increase large_align to track the largest | |
1067 | required alignment. */ | |
1068 | if ((alignb * BITS_PER_UNIT) > large_align) | |
1069 | large_align = alignb * BITS_PER_UNIT; | |
1070 | ||
3a42502d RH |
1071 | /* Stop when we get to the first decl with "small" alignment. */ |
1072 | if (alignb * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
1073 | break; | |
1074 | ||
1075 | /* Skip variables that aren't partition representatives. */ | |
1076 | if (stack_vars[i].representative != i) | |
1077 | continue; | |
1078 | ||
1079 | /* Skip variables that have already had rtl assigned. See also | |
1080 | add_stack_var where we perpetrate this pc_rtx hack. */ | |
1081 | decl = stack_vars[i].decl; | |
1f9ceff1 AO |
1082 | if (TREE_CODE (decl) == SSA_NAME |
1083 | ? SA.partition_to_pseudo[var_to_partition (SA.map, decl)] != NULL_RTX | |
1084 | : DECL_RTL (decl) != pc_rtx) | |
3a42502d RH |
1085 | continue; |
1086 | ||
1087 | large_size += alignb - 1; | |
1088 | large_size &= -(HOST_WIDE_INT)alignb; | |
1089 | large_size += stack_vars[i].size; | |
1090 | } | |
3a42502d | 1091 | } |
1f6d3a08 RH |
1092 | |
1093 | for (si = 0; si < n; ++si) | |
1094 | { | |
3a42502d RH |
1095 | rtx base; |
1096 | unsigned base_align, alignb; | |
1f6d3a08 RH |
1097 | HOST_WIDE_INT offset; |
1098 | ||
1099 | i = stack_vars_sorted[si]; | |
1100 | ||
1101 | /* Skip variables that aren't partition representatives, for now. */ | |
1102 | if (stack_vars[i].representative != i) | |
1103 | continue; | |
1104 | ||
7d69de61 RH |
1105 | /* Skip variables that have already had rtl assigned. See also |
1106 | add_stack_var where we perpetrate this pc_rtx hack. */ | |
3a42502d | 1107 | decl = stack_vars[i].decl; |
1f9ceff1 AO |
1108 | if (TREE_CODE (decl) == SSA_NAME |
1109 | ? SA.partition_to_pseudo[var_to_partition (SA.map, decl)] != NULL_RTX | |
1110 | : DECL_RTL (decl) != pc_rtx) | |
7d69de61 RH |
1111 | continue; |
1112 | ||
c22cacf3 | 1113 | /* Check the predicate to see whether this variable should be |
7d69de61 | 1114 | allocated in this pass. */ |
f3ddd692 | 1115 | if (pred && !pred (i)) |
7d69de61 RH |
1116 | continue; |
1117 | ||
3a42502d RH |
1118 | alignb = stack_vars[i].alignb; |
1119 | if (alignb * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
1120 | { | |
e361382f | 1121 | base = virtual_stack_vars_rtx; |
6dc4a604 ML |
1122 | if ((asan_sanitize_stack_p ()) |
1123 | && pred) | |
f3ddd692 | 1124 | { |
435be747 MO |
1125 | HOST_WIDE_INT prev_offset |
1126 | = align_base (frame_offset, | |
1127 | MAX (alignb, ASAN_RED_ZONE_SIZE), | |
d6c1a7a7 | 1128 | !FRAME_GROWS_DOWNWARD); |
f3ddd692 | 1129 | tree repr_decl = NULL_TREE; |
f3ddd692 JJ |
1130 | offset |
1131 | = alloc_stack_frame_space (stack_vars[i].size | |
1132 | + ASAN_RED_ZONE_SIZE, | |
1133 | MAX (alignb, ASAN_RED_ZONE_SIZE)); | |
435be747 | 1134 | |
9771b263 DN |
1135 | data->asan_vec.safe_push (prev_offset); |
1136 | data->asan_vec.safe_push (offset + stack_vars[i].size); | |
f3ddd692 JJ |
1137 | /* Find best representative of the partition. |
1138 | Prefer those with DECL_NAME, even better | |
1139 | satisfying asan_protect_stack_decl predicate. */ | |
1140 | for (j = i; j != EOC; j = stack_vars[j].next) | |
1141 | if (asan_protect_stack_decl (stack_vars[j].decl) | |
1142 | && DECL_NAME (stack_vars[j].decl)) | |
1143 | { | |
1144 | repr_decl = stack_vars[j].decl; | |
1145 | break; | |
1146 | } | |
1147 | else if (repr_decl == NULL_TREE | |
1148 | && DECL_P (stack_vars[j].decl) | |
1149 | && DECL_NAME (stack_vars[j].decl)) | |
1150 | repr_decl = stack_vars[j].decl; | |
1151 | if (repr_decl == NULL_TREE) | |
1152 | repr_decl = stack_vars[i].decl; | |
9771b263 | 1153 | data->asan_decl_vec.safe_push (repr_decl); |
e361382f JJ |
1154 | data->asan_alignb = MAX (data->asan_alignb, alignb); |
1155 | if (data->asan_base == NULL) | |
1156 | data->asan_base = gen_reg_rtx (Pmode); | |
1157 | base = data->asan_base; | |
e5dcd695 LZ |
1158 | |
1159 | if (!STRICT_ALIGNMENT) | |
1160 | base_align = crtl->max_used_stack_slot_alignment; | |
1161 | else | |
1162 | base_align = MAX (crtl->max_used_stack_slot_alignment, | |
1163 | GET_MODE_ALIGNMENT (SImode) | |
1164 | << ASAN_SHADOW_SHIFT); | |
f3ddd692 JJ |
1165 | } |
1166 | else | |
e5dcd695 LZ |
1167 | { |
1168 | offset = alloc_stack_frame_space (stack_vars[i].size, alignb); | |
1169 | base_align = crtl->max_used_stack_slot_alignment; | |
1170 | } | |
3a42502d RH |
1171 | } |
1172 | else | |
1173 | { | |
1174 | /* Large alignment is only processed in the last pass. */ | |
1175 | if (pred) | |
1176 | continue; | |
7072df0a DV |
1177 | |
1178 | /* If there were any variables requiring "large" alignment, allocate | |
1179 | space. */ | |
1180 | if (large_size > 0 && ! large_allocation_done) | |
1181 | { | |
1182 | HOST_WIDE_INT loffset; | |
1183 | rtx large_allocsize; | |
1184 | ||
1185 | large_allocsize = GEN_INT (large_size); | |
1186 | get_dynamic_stack_size (&large_allocsize, 0, large_align, NULL); | |
1187 | loffset = alloc_stack_frame_space | |
1188 | (INTVAL (large_allocsize), | |
1189 | PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT); | |
1190 | large_base = get_dynamic_stack_base (loffset, large_align); | |
1191 | large_allocation_done = true; | |
1192 | } | |
533f611a | 1193 | gcc_assert (large_base != NULL); |
3a42502d RH |
1194 | |
1195 | large_alloc += alignb - 1; | |
1196 | large_alloc &= -(HOST_WIDE_INT)alignb; | |
1197 | offset = large_alloc; | |
1198 | large_alloc += stack_vars[i].size; | |
1199 | ||
1200 | base = large_base; | |
1201 | base_align = large_align; | |
1202 | } | |
1f6d3a08 RH |
1203 | |
1204 | /* Create rtl for each variable based on their location within the | |
1205 | partition. */ | |
1206 | for (j = i; j != EOC; j = stack_vars[j].next) | |
f8da8190 | 1207 | { |
f8da8190 | 1208 | expand_one_stack_var_at (stack_vars[j].decl, |
3a42502d | 1209 | base, base_align, |
6ddfda8a | 1210 | offset); |
f8da8190 | 1211 | } |
1f6d3a08 | 1212 | } |
3a42502d RH |
1213 | |
1214 | gcc_assert (large_alloc == large_size); | |
1f6d3a08 RH |
1215 | } |
1216 | ||
ff28a94d JH |
1217 | /* Take into account all sizes of partitions and reset DECL_RTLs. */ |
1218 | static HOST_WIDE_INT | |
1219 | account_stack_vars (void) | |
1220 | { | |
1221 | size_t si, j, i, n = stack_vars_num; | |
1222 | HOST_WIDE_INT size = 0; | |
1223 | ||
1224 | for (si = 0; si < n; ++si) | |
1225 | { | |
1226 | i = stack_vars_sorted[si]; | |
1227 | ||
1228 | /* Skip variables that aren't partition representatives, for now. */ | |
1229 | if (stack_vars[i].representative != i) | |
1230 | continue; | |
1231 | ||
1232 | size += stack_vars[i].size; | |
1233 | for (j = i; j != EOC; j = stack_vars[j].next) | |
4e3825db | 1234 | set_rtl (stack_vars[j].decl, NULL); |
ff28a94d JH |
1235 | } |
1236 | return size; | |
1237 | } | |
1238 | ||
f11a7b6d AO |
1239 | /* Record the RTL assignment X for the default def of PARM. */ |
1240 | ||
1241 | extern void | |
1242 | set_parm_rtl (tree parm, rtx x) | |
1243 | { | |
1244 | gcc_assert (TREE_CODE (parm) == PARM_DECL | |
1245 | || TREE_CODE (parm) == RESULT_DECL); | |
1246 | ||
1247 | if (x && !MEM_P (x)) | |
1248 | { | |
1249 | unsigned int align = MINIMUM_ALIGNMENT (TREE_TYPE (parm), | |
1250 | TYPE_MODE (TREE_TYPE (parm)), | |
1251 | TYPE_ALIGN (TREE_TYPE (parm))); | |
1252 | ||
1253 | /* If the variable alignment is very large we'll dynamicaly | |
1254 | allocate it, which means that in-frame portion is just a | |
1255 | pointer. ??? We've got a pseudo for sure here, do we | |
1256 | actually dynamically allocate its spilling area if needed? | |
1257 | ??? Isn't it a problem when POINTER_SIZE also exceeds | |
1258 | MAX_SUPPORTED_STACK_ALIGNMENT, as on cris and lm32? */ | |
1259 | if (align > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1260 | align = POINTER_SIZE; | |
1261 | ||
1262 | record_alignment_for_reg_var (align); | |
1263 | } | |
1264 | ||
f11a7b6d AO |
1265 | tree ssa = ssa_default_def (cfun, parm); |
1266 | if (!ssa) | |
1267 | return set_rtl (parm, x); | |
1268 | ||
1269 | int part = var_to_partition (SA.map, ssa); | |
1270 | gcc_assert (part != NO_PARTITION); | |
1271 | ||
1272 | bool changed = bitmap_bit_p (SA.partitions_for_parm_default_defs, part); | |
1273 | gcc_assert (changed); | |
1274 | ||
1275 | set_rtl (ssa, x); | |
1276 | gcc_assert (DECL_RTL (parm) == x); | |
1277 | } | |
1278 | ||
1f6d3a08 RH |
1279 | /* A subroutine of expand_one_var. Called to immediately assign rtl |
1280 | to a variable to be allocated in the stack frame. */ | |
1281 | ||
1282 | static void | |
1f9ceff1 | 1283 | expand_one_stack_var_1 (tree var) |
1f6d3a08 | 1284 | { |
3a42502d RH |
1285 | HOST_WIDE_INT size, offset; |
1286 | unsigned byte_align; | |
1f6d3a08 | 1287 | |
1f9ceff1 AO |
1288 | if (TREE_CODE (var) == SSA_NAME) |
1289 | { | |
1290 | tree type = TREE_TYPE (var); | |
1291 | size = tree_to_uhwi (TYPE_SIZE_UNIT (type)); | |
1292 | byte_align = TYPE_ALIGN_UNIT (type); | |
1293 | } | |
1294 | else | |
1295 | { | |
1296 | size = tree_to_uhwi (DECL_SIZE_UNIT (var)); | |
1297 | byte_align = align_local_variable (var); | |
1298 | } | |
3a42502d RH |
1299 | |
1300 | /* We handle highly aligned variables in expand_stack_vars. */ | |
1301 | gcc_assert (byte_align * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT); | |
1f6d3a08 | 1302 | |
3a42502d RH |
1303 | offset = alloc_stack_frame_space (size, byte_align); |
1304 | ||
1305 | expand_one_stack_var_at (var, virtual_stack_vars_rtx, | |
1306 | crtl->max_used_stack_slot_alignment, offset); | |
1f6d3a08 RH |
1307 | } |
1308 | ||
1f9ceff1 AO |
1309 | /* Wrapper for expand_one_stack_var_1 that checks SSA_NAMEs are |
1310 | already assigned some MEM. */ | |
1311 | ||
1312 | static void | |
1313 | expand_one_stack_var (tree var) | |
1314 | { | |
1315 | if (TREE_CODE (var) == SSA_NAME) | |
1316 | { | |
1317 | int part = var_to_partition (SA.map, var); | |
1318 | if (part != NO_PARTITION) | |
1319 | { | |
1320 | rtx x = SA.partition_to_pseudo[part]; | |
1321 | gcc_assert (x); | |
1322 | gcc_assert (MEM_P (x)); | |
1323 | return; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | return expand_one_stack_var_1 (var); | |
1328 | } | |
1329 | ||
1f6d3a08 RH |
1330 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL |
1331 | that will reside in a hard register. */ | |
1332 | ||
1333 | static void | |
1334 | expand_one_hard_reg_var (tree var) | |
1335 | { | |
1336 | rest_of_decl_compilation (var, 0, 0); | |
1337 | } | |
1338 | ||
1f9ceff1 AO |
1339 | /* Record the alignment requirements of some variable assigned to a |
1340 | pseudo. */ | |
1341 | ||
1342 | static void | |
1343 | record_alignment_for_reg_var (unsigned int align) | |
1344 | { | |
1345 | if (SUPPORTS_STACK_ALIGNMENT | |
1346 | && crtl->stack_alignment_estimated < align) | |
1347 | { | |
1348 | /* stack_alignment_estimated shouldn't change after stack | |
1349 | realign decision made */ | |
1350 | gcc_assert (!crtl->stack_realign_processed); | |
1351 | crtl->stack_alignment_estimated = align; | |
1352 | } | |
1353 | ||
1354 | /* stack_alignment_needed > PREFERRED_STACK_BOUNDARY is permitted. | |
1355 | So here we only make sure stack_alignment_needed >= align. */ | |
1356 | if (crtl->stack_alignment_needed < align) | |
1357 | crtl->stack_alignment_needed = align; | |
1358 | if (crtl->max_used_stack_slot_alignment < align) | |
1359 | crtl->max_used_stack_slot_alignment = align; | |
1360 | } | |
1361 | ||
1362 | /* Create RTL for an SSA partition. */ | |
1363 | ||
1364 | static void | |
1365 | expand_one_ssa_partition (tree var) | |
1366 | { | |
1367 | int part = var_to_partition (SA.map, var); | |
1368 | gcc_assert (part != NO_PARTITION); | |
1369 | ||
1370 | if (SA.partition_to_pseudo[part]) | |
1371 | return; | |
1372 | ||
1373 | unsigned int align = MINIMUM_ALIGNMENT (TREE_TYPE (var), | |
1374 | TYPE_MODE (TREE_TYPE (var)), | |
1375 | TYPE_ALIGN (TREE_TYPE (var))); | |
1376 | ||
1377 | /* If the variable alignment is very large we'll dynamicaly allocate | |
1378 | it, which means that in-frame portion is just a pointer. */ | |
1379 | if (align > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1380 | align = POINTER_SIZE; | |
1381 | ||
1382 | record_alignment_for_reg_var (align); | |
1383 | ||
1384 | if (!use_register_for_decl (var)) | |
1385 | { | |
f11a7b6d | 1386 | if (defer_stack_allocation (var, true)) |
1f9ceff1 AO |
1387 | add_stack_var (var); |
1388 | else | |
1389 | expand_one_stack_var_1 (var); | |
1390 | return; | |
1391 | } | |
1392 | ||
1393 | machine_mode reg_mode = promote_ssa_mode (var, NULL); | |
1f9ceff1 AO |
1394 | rtx x = gen_reg_rtx (reg_mode); |
1395 | ||
1396 | set_rtl (var, x); | |
bc2a7ceb EB |
1397 | |
1398 | /* For a promoted variable, X will not be used directly but wrapped in a | |
1399 | SUBREG with SUBREG_PROMOTED_VAR_P set, which means that the RTL land | |
1400 | will assume that its upper bits can be inferred from its lower bits. | |
1401 | Therefore, if X isn't initialized on every path from the entry, then | |
1402 | we must do it manually in order to fulfill the above assumption. */ | |
1403 | if (reg_mode != TYPE_MODE (TREE_TYPE (var)) | |
1404 | && bitmap_bit_p (SA.partitions_for_undefined_values, part)) | |
1405 | emit_move_insn (x, CONST0_RTX (reg_mode)); | |
1f9ceff1 AO |
1406 | } |
1407 | ||
f11a7b6d AO |
1408 | /* Record the association between the RTL generated for partition PART |
1409 | and the underlying variable of the SSA_NAME VAR. */ | |
1f9ceff1 AO |
1410 | |
1411 | static void | |
1412 | adjust_one_expanded_partition_var (tree var) | |
1413 | { | |
1414 | if (!var) | |
1415 | return; | |
1416 | ||
1417 | tree decl = SSA_NAME_VAR (var); | |
1418 | ||
1419 | int part = var_to_partition (SA.map, var); | |
1420 | if (part == NO_PARTITION) | |
1421 | return; | |
1422 | ||
1423 | rtx x = SA.partition_to_pseudo[part]; | |
1424 | ||
f11a7b6d | 1425 | gcc_assert (x); |
1f9ceff1 AO |
1426 | |
1427 | set_rtl (var, x); | |
1428 | ||
1429 | if (!REG_P (x)) | |
1430 | return; | |
1431 | ||
1432 | /* Note if the object is a user variable. */ | |
1433 | if (decl && !DECL_ARTIFICIAL (decl)) | |
1434 | mark_user_reg (x); | |
1435 | ||
1436 | if (POINTER_TYPE_P (decl ? TREE_TYPE (decl) : TREE_TYPE (var))) | |
1437 | mark_reg_pointer (x, get_pointer_alignment (var)); | |
1438 | } | |
1439 | ||
1f6d3a08 RH |
1440 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL |
1441 | that will reside in a pseudo register. */ | |
1442 | ||
1443 | static void | |
1444 | expand_one_register_var (tree var) | |
1445 | { | |
1f9ceff1 AO |
1446 | if (TREE_CODE (var) == SSA_NAME) |
1447 | { | |
1448 | int part = var_to_partition (SA.map, var); | |
1449 | if (part != NO_PARTITION) | |
1450 | { | |
1451 | rtx x = SA.partition_to_pseudo[part]; | |
1452 | gcc_assert (x); | |
1453 | gcc_assert (REG_P (x)); | |
1454 | return; | |
1455 | } | |
1456 | gcc_unreachable (); | |
1457 | } | |
1458 | ||
1459 | tree decl = var; | |
4e3825db | 1460 | tree type = TREE_TYPE (decl); |
ef4bddc2 | 1461 | machine_mode reg_mode = promote_decl_mode (decl, NULL); |
1f6d3a08 RH |
1462 | rtx x = gen_reg_rtx (reg_mode); |
1463 | ||
4e3825db | 1464 | set_rtl (var, x); |
1f6d3a08 RH |
1465 | |
1466 | /* Note if the object is a user variable. */ | |
4e3825db MM |
1467 | if (!DECL_ARTIFICIAL (decl)) |
1468 | mark_user_reg (x); | |
1f6d3a08 | 1469 | |
61021c2c | 1470 | if (POINTER_TYPE_P (type)) |
d466b407 | 1471 | mark_reg_pointer (x, get_pointer_alignment (var)); |
1f6d3a08 RH |
1472 | } |
1473 | ||
1474 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL that | |
128a79fb | 1475 | has some associated error, e.g. its type is error-mark. We just need |
1f6d3a08 RH |
1476 | to pick something that won't crash the rest of the compiler. */ |
1477 | ||
1478 | static void | |
1479 | expand_one_error_var (tree var) | |
1480 | { | |
ef4bddc2 | 1481 | machine_mode mode = DECL_MODE (var); |
1f6d3a08 RH |
1482 | rtx x; |
1483 | ||
1484 | if (mode == BLKmode) | |
1485 | x = gen_rtx_MEM (BLKmode, const0_rtx); | |
1486 | else if (mode == VOIDmode) | |
1487 | x = const0_rtx; | |
1488 | else | |
1489 | x = gen_reg_rtx (mode); | |
1490 | ||
1491 | SET_DECL_RTL (var, x); | |
1492 | } | |
1493 | ||
c22cacf3 | 1494 | /* A subroutine of expand_one_var. VAR is a variable that will be |
1f6d3a08 RH |
1495 | allocated to the local stack frame. Return true if we wish to |
1496 | add VAR to STACK_VARS so that it will be coalesced with other | |
1497 | variables. Return false to allocate VAR immediately. | |
1498 | ||
1499 | This function is used to reduce the number of variables considered | |
1500 | for coalescing, which reduces the size of the quadratic problem. */ | |
1501 | ||
1502 | static bool | |
1503 | defer_stack_allocation (tree var, bool toplevel) | |
1504 | { | |
1f9ceff1 AO |
1505 | tree size_unit = TREE_CODE (var) == SSA_NAME |
1506 | ? TYPE_SIZE_UNIT (TREE_TYPE (var)) | |
1507 | : DECL_SIZE_UNIT (var); | |
1508 | ||
ee2e8462 EB |
1509 | /* Whether the variable is small enough for immediate allocation not to be |
1510 | a problem with regard to the frame size. */ | |
1511 | bool smallish | |
1f9ceff1 | 1512 | = ((HOST_WIDE_INT) tree_to_uhwi (size_unit) |
ee2e8462 EB |
1513 | < PARAM_VALUE (PARAM_MIN_SIZE_FOR_STACK_SHARING)); |
1514 | ||
7d69de61 | 1515 | /* If stack protection is enabled, *all* stack variables must be deferred, |
f3ddd692 JJ |
1516 | so that we can re-order the strings to the top of the frame. |
1517 | Similarly for Address Sanitizer. */ | |
c461d263 | 1518 | if (flag_stack_protect || asan_sanitize_stack_p ()) |
7d69de61 RH |
1519 | return true; |
1520 | ||
1f9ceff1 AO |
1521 | unsigned int align = TREE_CODE (var) == SSA_NAME |
1522 | ? TYPE_ALIGN (TREE_TYPE (var)) | |
1523 | : DECL_ALIGN (var); | |
1524 | ||
3a42502d RH |
1525 | /* We handle "large" alignment via dynamic allocation. We want to handle |
1526 | this extra complication in only one place, so defer them. */ | |
1f9ceff1 | 1527 | if (align > MAX_SUPPORTED_STACK_ALIGNMENT) |
3a42502d RH |
1528 | return true; |
1529 | ||
1f9ceff1 AO |
1530 | bool ignored = TREE_CODE (var) == SSA_NAME |
1531 | ? !SSAVAR (var) || DECL_IGNORED_P (SSA_NAME_VAR (var)) | |
1532 | : DECL_IGNORED_P (var); | |
1533 | ||
ee2e8462 EB |
1534 | /* When optimization is enabled, DECL_IGNORED_P variables originally scoped |
1535 | might be detached from their block and appear at toplevel when we reach | |
1536 | here. We want to coalesce them with variables from other blocks when | |
1537 | the immediate contribution to the frame size would be noticeable. */ | |
1f9ceff1 | 1538 | if (toplevel && optimize > 0 && ignored && !smallish) |
ee2e8462 EB |
1539 | return true; |
1540 | ||
1541 | /* Variables declared in the outermost scope automatically conflict | |
1542 | with every other variable. The only reason to want to defer them | |
1f6d3a08 RH |
1543 | at all is that, after sorting, we can more efficiently pack |
1544 | small variables in the stack frame. Continue to defer at -O2. */ | |
1545 | if (toplevel && optimize < 2) | |
1546 | return false; | |
1547 | ||
1548 | /* Without optimization, *most* variables are allocated from the | |
1549 | stack, which makes the quadratic problem large exactly when we | |
c22cacf3 | 1550 | want compilation to proceed as quickly as possible. On the |
1f6d3a08 RH |
1551 | other hand, we don't want the function's stack frame size to |
1552 | get completely out of hand. So we avoid adding scalars and | |
1553 | "small" aggregates to the list at all. */ | |
ee2e8462 | 1554 | if (optimize == 0 && smallish) |
1f6d3a08 RH |
1555 | return false; |
1556 | ||
1557 | return true; | |
1558 | } | |
1559 | ||
1560 | /* A subroutine of expand_used_vars. Expand one variable according to | |
2a7e31df | 1561 | its flavor. Variables to be placed on the stack are not actually |
b8698a0f | 1562 | expanded yet, merely recorded. |
ff28a94d JH |
1563 | When REALLY_EXPAND is false, only add stack values to be allocated. |
1564 | Return stack usage this variable is supposed to take. | |
1565 | */ | |
1f6d3a08 | 1566 | |
ff28a94d JH |
1567 | static HOST_WIDE_INT |
1568 | expand_one_var (tree var, bool toplevel, bool really_expand) | |
1f6d3a08 | 1569 | { |
3a42502d | 1570 | unsigned int align = BITS_PER_UNIT; |
4e3825db | 1571 | tree origvar = var; |
3a42502d | 1572 | |
4e3825db MM |
1573 | var = SSAVAR (var); |
1574 | ||
8813a647 | 1575 | if (TREE_TYPE (var) != error_mark_node && VAR_P (var)) |
2e3f842f | 1576 | { |
9d7d6446 JB |
1577 | if (is_global_var (var)) |
1578 | return 0; | |
1579 | ||
2e3f842f L |
1580 | /* Because we don't know if VAR will be in register or on stack, |
1581 | we conservatively assume it will be on stack even if VAR is | |
1582 | eventually put into register after RA pass. For non-automatic | |
1583 | variables, which won't be on stack, we collect alignment of | |
3396aba5 JJ |
1584 | type and ignore user specified alignment. Similarly for |
1585 | SSA_NAMEs for which use_register_for_decl returns true. */ | |
1586 | if (TREE_STATIC (var) | |
1587 | || DECL_EXTERNAL (var) | |
1588 | || (TREE_CODE (origvar) == SSA_NAME && use_register_for_decl (var))) | |
ae58e548 JJ |
1589 | align = MINIMUM_ALIGNMENT (TREE_TYPE (var), |
1590 | TYPE_MODE (TREE_TYPE (var)), | |
1591 | TYPE_ALIGN (TREE_TYPE (var))); | |
f3184b4c JJ |
1592 | else if (DECL_HAS_VALUE_EXPR_P (var) |
1593 | || (DECL_RTL_SET_P (var) && MEM_P (DECL_RTL (var)))) | |
1594 | /* Don't consider debug only variables with DECL_HAS_VALUE_EXPR_P set | |
1595 | or variables which were assigned a stack slot already by | |
1596 | expand_one_stack_var_at - in the latter case DECL_ALIGN has been | |
1597 | changed from the offset chosen to it. */ | |
1598 | align = crtl->stack_alignment_estimated; | |
2e3f842f | 1599 | else |
ae58e548 | 1600 | align = MINIMUM_ALIGNMENT (var, DECL_MODE (var), DECL_ALIGN (var)); |
2e3f842f | 1601 | |
3a42502d RH |
1602 | /* If the variable alignment is very large we'll dynamicaly allocate |
1603 | it, which means that in-frame portion is just a pointer. */ | |
1604 | if (align > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1605 | align = POINTER_SIZE; | |
1606 | } | |
1607 | ||
1f9ceff1 | 1608 | record_alignment_for_reg_var (align); |
3a42502d | 1609 | |
4e3825db MM |
1610 | if (TREE_CODE (origvar) == SSA_NAME) |
1611 | { | |
8813a647 | 1612 | gcc_assert (!VAR_P (var) |
4e3825db MM |
1613 | || (!DECL_EXTERNAL (var) |
1614 | && !DECL_HAS_VALUE_EXPR_P (var) | |
1615 | && !TREE_STATIC (var) | |
4e3825db MM |
1616 | && TREE_TYPE (var) != error_mark_node |
1617 | && !DECL_HARD_REGISTER (var) | |
1618 | && really_expand)); | |
1619 | } | |
8813a647 | 1620 | if (!VAR_P (var) && TREE_CODE (origvar) != SSA_NAME) |
4846b435 | 1621 | ; |
1f6d3a08 RH |
1622 | else if (DECL_EXTERNAL (var)) |
1623 | ; | |
833b3afe | 1624 | else if (DECL_HAS_VALUE_EXPR_P (var)) |
1f6d3a08 RH |
1625 | ; |
1626 | else if (TREE_STATIC (var)) | |
7e8b322a | 1627 | ; |
eb7adebc | 1628 | else if (TREE_CODE (origvar) != SSA_NAME && DECL_RTL_SET_P (var)) |
1f6d3a08 RH |
1629 | ; |
1630 | else if (TREE_TYPE (var) == error_mark_node) | |
ff28a94d JH |
1631 | { |
1632 | if (really_expand) | |
1633 | expand_one_error_var (var); | |
1634 | } | |
8813a647 | 1635 | else if (VAR_P (var) && DECL_HARD_REGISTER (var)) |
ff28a94d JH |
1636 | { |
1637 | if (really_expand) | |
c218f6e8 JM |
1638 | { |
1639 | expand_one_hard_reg_var (var); | |
1640 | if (!DECL_HARD_REGISTER (var)) | |
1641 | /* Invalid register specification. */ | |
1642 | expand_one_error_var (var); | |
1643 | } | |
ff28a94d | 1644 | } |
1f6d3a08 | 1645 | else if (use_register_for_decl (var)) |
ff28a94d JH |
1646 | { |
1647 | if (really_expand) | |
4e3825db | 1648 | expand_one_register_var (origvar); |
ff28a94d | 1649 | } |
56099f00 | 1650 | else if (! valid_constant_size_p (DECL_SIZE_UNIT (var))) |
7604eb4e | 1651 | { |
56099f00 | 1652 | /* Reject variables which cover more than half of the address-space. */ |
7604eb4e JJ |
1653 | if (really_expand) |
1654 | { | |
1655 | error ("size of variable %q+D is too large", var); | |
1656 | expand_one_error_var (var); | |
1657 | } | |
1658 | } | |
1f6d3a08 | 1659 | else if (defer_stack_allocation (var, toplevel)) |
4e3825db | 1660 | add_stack_var (origvar); |
1f6d3a08 | 1661 | else |
ff28a94d | 1662 | { |
bd9f1b4b | 1663 | if (really_expand) |
de0fb905 AB |
1664 | { |
1665 | if (lookup_attribute ("naked", | |
1666 | DECL_ATTRIBUTES (current_function_decl))) | |
1667 | error ("cannot allocate stack for variable %q+D, naked function.", | |
1668 | var); | |
1669 | ||
1670 | expand_one_stack_var (origvar); | |
1671 | } | |
1672 | ||
1673 | ||
ae7e9ddd | 1674 | return tree_to_uhwi (DECL_SIZE_UNIT (var)); |
ff28a94d JH |
1675 | } |
1676 | return 0; | |
1f6d3a08 RH |
1677 | } |
1678 | ||
1679 | /* A subroutine of expand_used_vars. Walk down through the BLOCK tree | |
1680 | expanding variables. Those variables that can be put into registers | |
1681 | are allocated pseudos; those that can't are put on the stack. | |
1682 | ||
1683 | TOPLEVEL is true if this is the outermost BLOCK. */ | |
1684 | ||
1685 | static void | |
1686 | expand_used_vars_for_block (tree block, bool toplevel) | |
1687 | { | |
1f6d3a08 RH |
1688 | tree t; |
1689 | ||
1f6d3a08 | 1690 | /* Expand all variables at this level. */ |
910ad8de | 1691 | for (t = BLOCK_VARS (block); t ; t = DECL_CHAIN (t)) |
1ace6185 | 1692 | if (TREE_USED (t) |
8813a647 | 1693 | && ((!VAR_P (t) && TREE_CODE (t) != RESULT_DECL) |
1ace6185 | 1694 | || !DECL_NONSHAREABLE (t))) |
ff28a94d | 1695 | expand_one_var (t, toplevel, true); |
1f6d3a08 | 1696 | |
1f6d3a08 RH |
1697 | /* Expand all variables at containing levels. */ |
1698 | for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t)) | |
1699 | expand_used_vars_for_block (t, false); | |
1f6d3a08 RH |
1700 | } |
1701 | ||
1702 | /* A subroutine of expand_used_vars. Walk down through the BLOCK tree | |
1703 | and clear TREE_USED on all local variables. */ | |
1704 | ||
1705 | static void | |
1706 | clear_tree_used (tree block) | |
1707 | { | |
1708 | tree t; | |
1709 | ||
910ad8de | 1710 | for (t = BLOCK_VARS (block); t ; t = DECL_CHAIN (t)) |
1f6d3a08 | 1711 | /* if (!TREE_STATIC (t) && !DECL_EXTERNAL (t)) */ |
8813a647 | 1712 | if ((!VAR_P (t) && TREE_CODE (t) != RESULT_DECL) |
1ace6185 | 1713 | || !DECL_NONSHAREABLE (t)) |
1f6d3a08 RH |
1714 | TREE_USED (t) = 0; |
1715 | ||
1716 | for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t)) | |
1717 | clear_tree_used (t); | |
1718 | } | |
1719 | ||
f6bc1c4a HS |
1720 | enum { |
1721 | SPCT_FLAG_DEFAULT = 1, | |
1722 | SPCT_FLAG_ALL = 2, | |
5434dc07 MD |
1723 | SPCT_FLAG_STRONG = 3, |
1724 | SPCT_FLAG_EXPLICIT = 4 | |
f6bc1c4a HS |
1725 | }; |
1726 | ||
7d69de61 RH |
1727 | /* Examine TYPE and determine a bit mask of the following features. */ |
1728 | ||
1729 | #define SPCT_HAS_LARGE_CHAR_ARRAY 1 | |
1730 | #define SPCT_HAS_SMALL_CHAR_ARRAY 2 | |
1731 | #define SPCT_HAS_ARRAY 4 | |
1732 | #define SPCT_HAS_AGGREGATE 8 | |
1733 | ||
1734 | static unsigned int | |
1735 | stack_protect_classify_type (tree type) | |
1736 | { | |
1737 | unsigned int ret = 0; | |
1738 | tree t; | |
1739 | ||
1740 | switch (TREE_CODE (type)) | |
1741 | { | |
1742 | case ARRAY_TYPE: | |
1743 | t = TYPE_MAIN_VARIANT (TREE_TYPE (type)); | |
1744 | if (t == char_type_node | |
1745 | || t == signed_char_type_node | |
1746 | || t == unsigned_char_type_node) | |
1747 | { | |
15362b89 JJ |
1748 | unsigned HOST_WIDE_INT max = PARAM_VALUE (PARAM_SSP_BUFFER_SIZE); |
1749 | unsigned HOST_WIDE_INT len; | |
7d69de61 | 1750 | |
15362b89 | 1751 | if (!TYPE_SIZE_UNIT (type) |
cc269bb6 | 1752 | || !tree_fits_uhwi_p (TYPE_SIZE_UNIT (type))) |
15362b89 | 1753 | len = max; |
7d69de61 | 1754 | else |
ae7e9ddd | 1755 | len = tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
7d69de61 RH |
1756 | |
1757 | if (len < max) | |
1758 | ret = SPCT_HAS_SMALL_CHAR_ARRAY | SPCT_HAS_ARRAY; | |
1759 | else | |
1760 | ret = SPCT_HAS_LARGE_CHAR_ARRAY | SPCT_HAS_ARRAY; | |
1761 | } | |
1762 | else | |
1763 | ret = SPCT_HAS_ARRAY; | |
1764 | break; | |
1765 | ||
1766 | case UNION_TYPE: | |
1767 | case QUAL_UNION_TYPE: | |
1768 | case RECORD_TYPE: | |
1769 | ret = SPCT_HAS_AGGREGATE; | |
1770 | for (t = TYPE_FIELDS (type); t ; t = TREE_CHAIN (t)) | |
1771 | if (TREE_CODE (t) == FIELD_DECL) | |
1772 | ret |= stack_protect_classify_type (TREE_TYPE (t)); | |
1773 | break; | |
1774 | ||
1775 | default: | |
1776 | break; | |
1777 | } | |
1778 | ||
1779 | return ret; | |
1780 | } | |
1781 | ||
a4d05547 KH |
1782 | /* Return nonzero if DECL should be segregated into the "vulnerable" upper |
1783 | part of the local stack frame. Remember if we ever return nonzero for | |
7d69de61 RH |
1784 | any variable in this function. The return value is the phase number in |
1785 | which the variable should be allocated. */ | |
1786 | ||
1787 | static int | |
1788 | stack_protect_decl_phase (tree decl) | |
1789 | { | |
1790 | unsigned int bits = stack_protect_classify_type (TREE_TYPE (decl)); | |
1791 | int ret = 0; | |
1792 | ||
1793 | if (bits & SPCT_HAS_SMALL_CHAR_ARRAY) | |
1794 | has_short_buffer = true; | |
1795 | ||
f6bc1c4a | 1796 | if (flag_stack_protect == SPCT_FLAG_ALL |
5434dc07 MD |
1797 | || flag_stack_protect == SPCT_FLAG_STRONG |
1798 | || (flag_stack_protect == SPCT_FLAG_EXPLICIT | |
1799 | && lookup_attribute ("stack_protect", | |
1800 | DECL_ATTRIBUTES (current_function_decl)))) | |
7d69de61 RH |
1801 | { |
1802 | if ((bits & (SPCT_HAS_SMALL_CHAR_ARRAY | SPCT_HAS_LARGE_CHAR_ARRAY)) | |
1803 | && !(bits & SPCT_HAS_AGGREGATE)) | |
1804 | ret = 1; | |
1805 | else if (bits & SPCT_HAS_ARRAY) | |
1806 | ret = 2; | |
1807 | } | |
1808 | else | |
1809 | ret = (bits & SPCT_HAS_LARGE_CHAR_ARRAY) != 0; | |
1810 | ||
1811 | if (ret) | |
1812 | has_protected_decls = true; | |
1813 | ||
1814 | return ret; | |
1815 | } | |
1816 | ||
1817 | /* Two helper routines that check for phase 1 and phase 2. These are used | |
1818 | as callbacks for expand_stack_vars. */ | |
1819 | ||
1820 | static bool | |
f3ddd692 JJ |
1821 | stack_protect_decl_phase_1 (size_t i) |
1822 | { | |
1823 | return stack_protect_decl_phase (stack_vars[i].decl) == 1; | |
1824 | } | |
1825 | ||
1826 | static bool | |
1827 | stack_protect_decl_phase_2 (size_t i) | |
7d69de61 | 1828 | { |
f3ddd692 | 1829 | return stack_protect_decl_phase (stack_vars[i].decl) == 2; |
7d69de61 RH |
1830 | } |
1831 | ||
f3ddd692 JJ |
1832 | /* And helper function that checks for asan phase (with stack protector |
1833 | it is phase 3). This is used as callback for expand_stack_vars. | |
1834 | Returns true if any of the vars in the partition need to be protected. */ | |
1835 | ||
7d69de61 | 1836 | static bool |
f3ddd692 | 1837 | asan_decl_phase_3 (size_t i) |
7d69de61 | 1838 | { |
f3ddd692 JJ |
1839 | while (i != EOC) |
1840 | { | |
1841 | if (asan_protect_stack_decl (stack_vars[i].decl)) | |
1842 | return true; | |
1843 | i = stack_vars[i].next; | |
1844 | } | |
1845 | return false; | |
7d69de61 RH |
1846 | } |
1847 | ||
1848 | /* Ensure that variables in different stack protection phases conflict | |
1849 | so that they are not merged and share the same stack slot. */ | |
1850 | ||
1851 | static void | |
1852 | add_stack_protection_conflicts (void) | |
1853 | { | |
1854 | size_t i, j, n = stack_vars_num; | |
1855 | unsigned char *phase; | |
1856 | ||
1857 | phase = XNEWVEC (unsigned char, n); | |
1858 | for (i = 0; i < n; ++i) | |
1859 | phase[i] = stack_protect_decl_phase (stack_vars[i].decl); | |
1860 | ||
1861 | for (i = 0; i < n; ++i) | |
1862 | { | |
1863 | unsigned char ph_i = phase[i]; | |
9b44f5d9 | 1864 | for (j = i + 1; j < n; ++j) |
7d69de61 RH |
1865 | if (ph_i != phase[j]) |
1866 | add_stack_var_conflict (i, j); | |
1867 | } | |
1868 | ||
1869 | XDELETEVEC (phase); | |
1870 | } | |
1871 | ||
1872 | /* Create a decl for the guard at the top of the stack frame. */ | |
1873 | ||
1874 | static void | |
1875 | create_stack_guard (void) | |
1876 | { | |
c2255bc4 AH |
1877 | tree guard = build_decl (DECL_SOURCE_LOCATION (current_function_decl), |
1878 | VAR_DECL, NULL, ptr_type_node); | |
7d69de61 RH |
1879 | TREE_THIS_VOLATILE (guard) = 1; |
1880 | TREE_USED (guard) = 1; | |
1881 | expand_one_stack_var (guard); | |
cb91fab0 | 1882 | crtl->stack_protect_guard = guard; |
7d69de61 RH |
1883 | } |
1884 | ||
ff28a94d | 1885 | /* Prepare for expanding variables. */ |
b8698a0f | 1886 | static void |
ff28a94d JH |
1887 | init_vars_expansion (void) |
1888 | { | |
3f9b14ff SB |
1889 | /* Conflict bitmaps, and a few related temporary bitmaps, go here. */ |
1890 | bitmap_obstack_initialize (&stack_var_bitmap_obstack); | |
ff28a94d | 1891 | |
3f9b14ff | 1892 | /* A map from decl to stack partition. */ |
39c8aaa4 | 1893 | decl_to_stack_part = new hash_map<tree, size_t>; |
ff28a94d JH |
1894 | |
1895 | /* Initialize local stack smashing state. */ | |
1896 | has_protected_decls = false; | |
1897 | has_short_buffer = false; | |
1898 | } | |
1899 | ||
1900 | /* Free up stack variable graph data. */ | |
1901 | static void | |
1902 | fini_vars_expansion (void) | |
1903 | { | |
3f9b14ff SB |
1904 | bitmap_obstack_release (&stack_var_bitmap_obstack); |
1905 | if (stack_vars) | |
1906 | XDELETEVEC (stack_vars); | |
1907 | if (stack_vars_sorted) | |
1908 | XDELETEVEC (stack_vars_sorted); | |
ff28a94d | 1909 | stack_vars = NULL; |
9b44f5d9 | 1910 | stack_vars_sorted = NULL; |
ff28a94d | 1911 | stack_vars_alloc = stack_vars_num = 0; |
39c8aaa4 | 1912 | delete decl_to_stack_part; |
47598145 | 1913 | decl_to_stack_part = NULL; |
ff28a94d JH |
1914 | } |
1915 | ||
30925d94 AO |
1916 | /* Make a fair guess for the size of the stack frame of the function |
1917 | in NODE. This doesn't have to be exact, the result is only used in | |
1918 | the inline heuristics. So we don't want to run the full stack var | |
1919 | packing algorithm (which is quadratic in the number of stack vars). | |
1920 | Instead, we calculate the total size of all stack vars. This turns | |
1921 | out to be a pretty fair estimate -- packing of stack vars doesn't | |
1922 | happen very often. */ | |
b5a430f3 | 1923 | |
ff28a94d | 1924 | HOST_WIDE_INT |
30925d94 | 1925 | estimated_stack_frame_size (struct cgraph_node *node) |
ff28a94d JH |
1926 | { |
1927 | HOST_WIDE_INT size = 0; | |
b5a430f3 | 1928 | size_t i; |
bb7e6d55 | 1929 | tree var; |
67348ccc | 1930 | struct function *fn = DECL_STRUCT_FUNCTION (node->decl); |
30925d94 | 1931 | |
bb7e6d55 | 1932 | push_cfun (fn); |
ff28a94d | 1933 | |
3f9b14ff SB |
1934 | init_vars_expansion (); |
1935 | ||
824f71b9 RG |
1936 | FOR_EACH_LOCAL_DECL (fn, i, var) |
1937 | if (auto_var_in_fn_p (var, fn->decl)) | |
1938 | size += expand_one_var (var, true, false); | |
b5a430f3 | 1939 | |
ff28a94d JH |
1940 | if (stack_vars_num > 0) |
1941 | { | |
b5a430f3 SB |
1942 | /* Fake sorting the stack vars for account_stack_vars (). */ |
1943 | stack_vars_sorted = XNEWVEC (size_t, stack_vars_num); | |
1944 | for (i = 0; i < stack_vars_num; ++i) | |
1945 | stack_vars_sorted[i] = i; | |
ff28a94d | 1946 | size += account_stack_vars (); |
ff28a94d | 1947 | } |
3f9b14ff SB |
1948 | |
1949 | fini_vars_expansion (); | |
2e1ec94f | 1950 | pop_cfun (); |
ff28a94d JH |
1951 | return size; |
1952 | } | |
1953 | ||
f6bc1c4a HS |
1954 | /* Helper routine to check if a record or union contains an array field. */ |
1955 | ||
1956 | static int | |
1957 | record_or_union_type_has_array_p (const_tree tree_type) | |
1958 | { | |
1959 | tree fields = TYPE_FIELDS (tree_type); | |
1960 | tree f; | |
1961 | ||
1962 | for (f = fields; f; f = DECL_CHAIN (f)) | |
1963 | if (TREE_CODE (f) == FIELD_DECL) | |
1964 | { | |
1965 | tree field_type = TREE_TYPE (f); | |
1966 | if (RECORD_OR_UNION_TYPE_P (field_type) | |
1967 | && record_or_union_type_has_array_p (field_type)) | |
1968 | return 1; | |
1969 | if (TREE_CODE (field_type) == ARRAY_TYPE) | |
1970 | return 1; | |
1971 | } | |
1972 | return 0; | |
1973 | } | |
1974 | ||
6545746e FW |
1975 | /* Check if the current function has local referenced variables that |
1976 | have their addresses taken, contain an array, or are arrays. */ | |
1977 | ||
1978 | static bool | |
1979 | stack_protect_decl_p () | |
1980 | { | |
1981 | unsigned i; | |
1982 | tree var; | |
1983 | ||
1984 | FOR_EACH_LOCAL_DECL (cfun, i, var) | |
1985 | if (!is_global_var (var)) | |
1986 | { | |
1987 | tree var_type = TREE_TYPE (var); | |
8813a647 | 1988 | if (VAR_P (var) |
6545746e FW |
1989 | && (TREE_CODE (var_type) == ARRAY_TYPE |
1990 | || TREE_ADDRESSABLE (var) | |
1991 | || (RECORD_OR_UNION_TYPE_P (var_type) | |
1992 | && record_or_union_type_has_array_p (var_type)))) | |
1993 | return true; | |
1994 | } | |
1995 | return false; | |
1996 | } | |
1997 | ||
1998 | /* Check if the current function has calls that use a return slot. */ | |
1999 | ||
2000 | static bool | |
2001 | stack_protect_return_slot_p () | |
2002 | { | |
2003 | basic_block bb; | |
2004 | ||
2005 | FOR_ALL_BB_FN (bb, cfun) | |
2006 | for (gimple_stmt_iterator gsi = gsi_start_bb (bb); | |
2007 | !gsi_end_p (gsi); gsi_next (&gsi)) | |
2008 | { | |
355fe088 | 2009 | gimple *stmt = gsi_stmt (gsi); |
6545746e FW |
2010 | /* This assumes that calls to internal-only functions never |
2011 | use a return slot. */ | |
2012 | if (is_gimple_call (stmt) | |
2013 | && !gimple_call_internal_p (stmt) | |
2014 | && aggregate_value_p (TREE_TYPE (gimple_call_fntype (stmt)), | |
2015 | gimple_call_fndecl (stmt))) | |
2016 | return true; | |
2017 | } | |
2018 | return false; | |
2019 | } | |
2020 | ||
1f6d3a08 | 2021 | /* Expand all variables used in the function. */ |
727a31fa | 2022 | |
b47aae36 | 2023 | static rtx_insn * |
727a31fa RH |
2024 | expand_used_vars (void) |
2025 | { | |
c021f10b | 2026 | tree var, outer_block = DECL_INITIAL (current_function_decl); |
8c681247 | 2027 | auto_vec<tree> maybe_local_decls; |
b47aae36 | 2028 | rtx_insn *var_end_seq = NULL; |
4e3825db | 2029 | unsigned i; |
c021f10b | 2030 | unsigned len; |
f6bc1c4a | 2031 | bool gen_stack_protect_signal = false; |
727a31fa | 2032 | |
1f6d3a08 RH |
2033 | /* Compute the phase of the stack frame for this function. */ |
2034 | { | |
2035 | int align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT; | |
2a31c321 | 2036 | int off = targetm.starting_frame_offset () % align; |
1f6d3a08 RH |
2037 | frame_phase = off ? align - off : 0; |
2038 | } | |
727a31fa | 2039 | |
3f9b14ff SB |
2040 | /* Set TREE_USED on all variables in the local_decls. */ |
2041 | FOR_EACH_LOCAL_DECL (cfun, i, var) | |
2042 | TREE_USED (var) = 1; | |
2043 | /* Clear TREE_USED on all variables associated with a block scope. */ | |
2044 | clear_tree_used (DECL_INITIAL (current_function_decl)); | |
2045 | ||
ff28a94d | 2046 | init_vars_expansion (); |
7d69de61 | 2047 | |
8f51aa6b IZ |
2048 | if (targetm.use_pseudo_pic_reg ()) |
2049 | pic_offset_table_rtx = gen_reg_rtx (Pmode); | |
2050 | ||
4e3825db MM |
2051 | for (i = 0; i < SA.map->num_partitions; i++) |
2052 | { | |
f11a7b6d AO |
2053 | if (bitmap_bit_p (SA.partitions_for_parm_default_defs, i)) |
2054 | continue; | |
2055 | ||
4e3825db MM |
2056 | tree var = partition_to_var (SA.map, i); |
2057 | ||
ea057359 | 2058 | gcc_assert (!virtual_operand_p (var)); |
70b5e7dc | 2059 | |
1f9ceff1 | 2060 | expand_one_ssa_partition (var); |
64d7fb90 | 2061 | } |
7eb9f42e | 2062 | |
f6bc1c4a | 2063 | if (flag_stack_protect == SPCT_FLAG_STRONG) |
6545746e FW |
2064 | gen_stack_protect_signal |
2065 | = stack_protect_decl_p () || stack_protect_return_slot_p (); | |
f6bc1c4a | 2066 | |
cb91fab0 | 2067 | /* At this point all variables on the local_decls with TREE_USED |
1f6d3a08 | 2068 | set are not associated with any block scope. Lay them out. */ |
c021f10b | 2069 | |
9771b263 | 2070 | len = vec_safe_length (cfun->local_decls); |
c021f10b | 2071 | FOR_EACH_LOCAL_DECL (cfun, i, var) |
1f6d3a08 | 2072 | { |
1f6d3a08 RH |
2073 | bool expand_now = false; |
2074 | ||
4e3825db MM |
2075 | /* Expanded above already. */ |
2076 | if (is_gimple_reg (var)) | |
eb7adebc MM |
2077 | { |
2078 | TREE_USED (var) = 0; | |
3adcf52c | 2079 | goto next; |
eb7adebc | 2080 | } |
1f6d3a08 RH |
2081 | /* We didn't set a block for static or extern because it's hard |
2082 | to tell the difference between a global variable (re)declared | |
2083 | in a local scope, and one that's really declared there to | |
2084 | begin with. And it doesn't really matter much, since we're | |
2085 | not giving them stack space. Expand them now. */ | |
4e3825db | 2086 | else if (TREE_STATIC (var) || DECL_EXTERNAL (var)) |
1f6d3a08 RH |
2087 | expand_now = true; |
2088 | ||
ee2e8462 EB |
2089 | /* Expand variables not associated with any block now. Those created by |
2090 | the optimizers could be live anywhere in the function. Those that | |
2091 | could possibly have been scoped originally and detached from their | |
2092 | block will have their allocation deferred so we coalesce them with | |
2093 | others when optimization is enabled. */ | |
1f6d3a08 RH |
2094 | else if (TREE_USED (var)) |
2095 | expand_now = true; | |
2096 | ||
2097 | /* Finally, mark all variables on the list as used. We'll use | |
2098 | this in a moment when we expand those associated with scopes. */ | |
2099 | TREE_USED (var) = 1; | |
2100 | ||
2101 | if (expand_now) | |
3adcf52c JM |
2102 | expand_one_var (var, true, true); |
2103 | ||
2104 | next: | |
2105 | if (DECL_ARTIFICIAL (var) && !DECL_IGNORED_P (var)) | |
802e9f8e | 2106 | { |
3adcf52c JM |
2107 | rtx rtl = DECL_RTL_IF_SET (var); |
2108 | ||
2109 | /* Keep artificial non-ignored vars in cfun->local_decls | |
2110 | chain until instantiate_decls. */ | |
2111 | if (rtl && (MEM_P (rtl) || GET_CODE (rtl) == CONCAT)) | |
c021f10b | 2112 | add_local_decl (cfun, var); |
6c6366f6 | 2113 | else if (rtl == NULL_RTX) |
c021f10b NF |
2114 | /* If rtl isn't set yet, which can happen e.g. with |
2115 | -fstack-protector, retry before returning from this | |
2116 | function. */ | |
9771b263 | 2117 | maybe_local_decls.safe_push (var); |
802e9f8e | 2118 | } |
1f6d3a08 | 2119 | } |
1f6d3a08 | 2120 | |
c021f10b NF |
2121 | /* We duplicated some of the decls in CFUN->LOCAL_DECLS. |
2122 | ||
2123 | +-----------------+-----------------+ | |
2124 | | ...processed... | ...duplicates...| | |
2125 | +-----------------+-----------------+ | |
2126 | ^ | |
2127 | +-- LEN points here. | |
2128 | ||
2129 | We just want the duplicates, as those are the artificial | |
2130 | non-ignored vars that we want to keep until instantiate_decls. | |
2131 | Move them down and truncate the array. */ | |
9771b263 DN |
2132 | if (!vec_safe_is_empty (cfun->local_decls)) |
2133 | cfun->local_decls->block_remove (0, len); | |
c021f10b | 2134 | |
1f6d3a08 RH |
2135 | /* At this point, all variables within the block tree with TREE_USED |
2136 | set are actually used by the optimized function. Lay them out. */ | |
2137 | expand_used_vars_for_block (outer_block, true); | |
2138 | ||
2139 | if (stack_vars_num > 0) | |
2140 | { | |
47598145 | 2141 | add_scope_conflicts (); |
1f6d3a08 | 2142 | |
c22cacf3 | 2143 | /* If stack protection is enabled, we don't share space between |
7d69de61 | 2144 | vulnerable data and non-vulnerable data. */ |
5434dc07 MD |
2145 | if (flag_stack_protect != 0 |
2146 | && (flag_stack_protect != SPCT_FLAG_EXPLICIT | |
2147 | || (flag_stack_protect == SPCT_FLAG_EXPLICIT | |
2148 | && lookup_attribute ("stack_protect", | |
2149 | DECL_ATTRIBUTES (current_function_decl))))) | |
7d69de61 RH |
2150 | add_stack_protection_conflicts (); |
2151 | ||
c22cacf3 | 2152 | /* Now that we have collected all stack variables, and have computed a |
1f6d3a08 RH |
2153 | minimal interference graph, attempt to save some stack space. */ |
2154 | partition_stack_vars (); | |
2155 | if (dump_file) | |
2156 | dump_stack_var_partition (); | |
7d69de61 RH |
2157 | } |
2158 | ||
f6bc1c4a HS |
2159 | switch (flag_stack_protect) |
2160 | { | |
2161 | case SPCT_FLAG_ALL: | |
2162 | create_stack_guard (); | |
2163 | break; | |
2164 | ||
2165 | case SPCT_FLAG_STRONG: | |
2166 | if (gen_stack_protect_signal | |
5434dc07 MD |
2167 | || cfun->calls_alloca || has_protected_decls |
2168 | || lookup_attribute ("stack_protect", | |
2169 | DECL_ATTRIBUTES (current_function_decl))) | |
f6bc1c4a HS |
2170 | create_stack_guard (); |
2171 | break; | |
2172 | ||
2173 | case SPCT_FLAG_DEFAULT: | |
5434dc07 MD |
2174 | if (cfun->calls_alloca || has_protected_decls |
2175 | || lookup_attribute ("stack_protect", | |
2176 | DECL_ATTRIBUTES (current_function_decl))) | |
c3284718 | 2177 | create_stack_guard (); |
f6bc1c4a HS |
2178 | break; |
2179 | ||
5434dc07 MD |
2180 | case SPCT_FLAG_EXPLICIT: |
2181 | if (lookup_attribute ("stack_protect", | |
2182 | DECL_ATTRIBUTES (current_function_decl))) | |
2183 | create_stack_guard (); | |
2184 | break; | |
f6bc1c4a HS |
2185 | default: |
2186 | ; | |
2187 | } | |
1f6d3a08 | 2188 | |
7d69de61 RH |
2189 | /* Assign rtl to each variable based on these partitions. */ |
2190 | if (stack_vars_num > 0) | |
2191 | { | |
f3ddd692 JJ |
2192 | struct stack_vars_data data; |
2193 | ||
e361382f JJ |
2194 | data.asan_base = NULL_RTX; |
2195 | data.asan_alignb = 0; | |
f3ddd692 | 2196 | |
7d69de61 RH |
2197 | /* Reorder decls to be protected by iterating over the variables |
2198 | array multiple times, and allocating out of each phase in turn. */ | |
c22cacf3 | 2199 | /* ??? We could probably integrate this into the qsort we did |
7d69de61 RH |
2200 | earlier, such that we naturally see these variables first, |
2201 | and thus naturally allocate things in the right order. */ | |
2202 | if (has_protected_decls) | |
2203 | { | |
2204 | /* Phase 1 contains only character arrays. */ | |
f3ddd692 | 2205 | expand_stack_vars (stack_protect_decl_phase_1, &data); |
7d69de61 RH |
2206 | |
2207 | /* Phase 2 contains other kinds of arrays. */ | |
5434dc07 MD |
2208 | if (flag_stack_protect == SPCT_FLAG_ALL |
2209 | || flag_stack_protect == SPCT_FLAG_STRONG | |
2210 | || (flag_stack_protect == SPCT_FLAG_EXPLICIT | |
2211 | && lookup_attribute ("stack_protect", | |
2212 | DECL_ATTRIBUTES (current_function_decl)))) | |
f3ddd692 | 2213 | expand_stack_vars (stack_protect_decl_phase_2, &data); |
7d69de61 RH |
2214 | } |
2215 | ||
c461d263 | 2216 | if (asan_sanitize_stack_p ()) |
f3ddd692 JJ |
2217 | /* Phase 3, any partitions that need asan protection |
2218 | in addition to phase 1 and 2. */ | |
2219 | expand_stack_vars (asan_decl_phase_3, &data); | |
2220 | ||
9771b263 | 2221 | if (!data.asan_vec.is_empty ()) |
f3ddd692 JJ |
2222 | { |
2223 | HOST_WIDE_INT prev_offset = frame_offset; | |
e361382f JJ |
2224 | HOST_WIDE_INT offset, sz, redzonesz; |
2225 | redzonesz = ASAN_RED_ZONE_SIZE; | |
2226 | sz = data.asan_vec[0] - prev_offset; | |
2227 | if (data.asan_alignb > ASAN_RED_ZONE_SIZE | |
2228 | && data.asan_alignb <= 4096 | |
3dc87cc0 | 2229 | && sz + ASAN_RED_ZONE_SIZE >= (int) data.asan_alignb) |
e361382f JJ |
2230 | redzonesz = ((sz + ASAN_RED_ZONE_SIZE + data.asan_alignb - 1) |
2231 | & ~(data.asan_alignb - HOST_WIDE_INT_1)) - sz; | |
2232 | offset | |
2233 | = alloc_stack_frame_space (redzonesz, ASAN_RED_ZONE_SIZE); | |
9771b263 DN |
2234 | data.asan_vec.safe_push (prev_offset); |
2235 | data.asan_vec.safe_push (offset); | |
e5dcd695 LZ |
2236 | /* Leave space for alignment if STRICT_ALIGNMENT. */ |
2237 | if (STRICT_ALIGNMENT) | |
2238 | alloc_stack_frame_space ((GET_MODE_ALIGNMENT (SImode) | |
2239 | << ASAN_SHADOW_SHIFT) | |
2240 | / BITS_PER_UNIT, 1); | |
f3ddd692 JJ |
2241 | |
2242 | var_end_seq | |
2243 | = asan_emit_stack_protection (virtual_stack_vars_rtx, | |
e361382f JJ |
2244 | data.asan_base, |
2245 | data.asan_alignb, | |
9771b263 | 2246 | data.asan_vec.address (), |
e361382f | 2247 | data.asan_decl_vec.address (), |
9771b263 | 2248 | data.asan_vec.length ()); |
f3ddd692 JJ |
2249 | } |
2250 | ||
2251 | expand_stack_vars (NULL, &data); | |
1f6d3a08 RH |
2252 | } |
2253 | ||
5094f7d5 | 2254 | if (asan_sanitize_allocas_p () && cfun->calls_alloca) |
e3174bdf MO |
2255 | var_end_seq = asan_emit_allocas_unpoison (virtual_stack_dynamic_rtx, |
2256 | virtual_stack_vars_rtx, | |
2257 | var_end_seq); | |
2258 | ||
3f9b14ff SB |
2259 | fini_vars_expansion (); |
2260 | ||
6c6366f6 JJ |
2261 | /* If there were any artificial non-ignored vars without rtl |
2262 | found earlier, see if deferred stack allocation hasn't assigned | |
2263 | rtl to them. */ | |
9771b263 | 2264 | FOR_EACH_VEC_ELT_REVERSE (maybe_local_decls, i, var) |
6c6366f6 | 2265 | { |
6c6366f6 JJ |
2266 | rtx rtl = DECL_RTL_IF_SET (var); |
2267 | ||
6c6366f6 JJ |
2268 | /* Keep artificial non-ignored vars in cfun->local_decls |
2269 | chain until instantiate_decls. */ | |
2270 | if (rtl && (MEM_P (rtl) || GET_CODE (rtl) == CONCAT)) | |
c021f10b | 2271 | add_local_decl (cfun, var); |
6c6366f6 JJ |
2272 | } |
2273 | ||
1f6d3a08 RH |
2274 | /* If the target requires that FRAME_OFFSET be aligned, do it. */ |
2275 | if (STACK_ALIGNMENT_NEEDED) | |
2276 | { | |
2277 | HOST_WIDE_INT align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT; | |
2278 | if (!FRAME_GROWS_DOWNWARD) | |
2279 | frame_offset += align - 1; | |
2280 | frame_offset &= -align; | |
2281 | } | |
f3ddd692 JJ |
2282 | |
2283 | return var_end_seq; | |
727a31fa RH |
2284 | } |
2285 | ||
2286 | ||
b7211528 SB |
2287 | /* If we need to produce a detailed dump, print the tree representation |
2288 | for STMT to the dump file. SINCE is the last RTX after which the RTL | |
2289 | generated for STMT should have been appended. */ | |
2290 | ||
2291 | static void | |
355fe088 | 2292 | maybe_dump_rtl_for_gimple_stmt (gimple *stmt, rtx_insn *since) |
b7211528 SB |
2293 | { |
2294 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
2295 | { | |
2296 | fprintf (dump_file, "\n;; "); | |
b5b8b0ac AO |
2297 | print_gimple_stmt (dump_file, stmt, 0, |
2298 | TDF_SLIM | (dump_flags & TDF_LINENO)); | |
b7211528 SB |
2299 | fprintf (dump_file, "\n"); |
2300 | ||
2301 | print_rtl (dump_file, since ? NEXT_INSN (since) : since); | |
2302 | } | |
2303 | } | |
2304 | ||
8b11009b ZD |
2305 | /* Maps the blocks that do not contain tree labels to rtx labels. */ |
2306 | ||
134aa83c | 2307 | static hash_map<basic_block, rtx_code_label *> *lab_rtx_for_bb; |
8b11009b | 2308 | |
a9b77cd1 ZD |
2309 | /* Returns the label_rtx expression for a label starting basic block BB. */ |
2310 | ||
1476d1bd | 2311 | static rtx_code_label * |
726a989a | 2312 | label_rtx_for_bb (basic_block bb ATTRIBUTE_UNUSED) |
a9b77cd1 | 2313 | { |
726a989a RB |
2314 | gimple_stmt_iterator gsi; |
2315 | tree lab; | |
a9b77cd1 ZD |
2316 | |
2317 | if (bb->flags & BB_RTL) | |
2318 | return block_label (bb); | |
2319 | ||
134aa83c | 2320 | rtx_code_label **elt = lab_rtx_for_bb->get (bb); |
8b11009b | 2321 | if (elt) |
39c8aaa4 | 2322 | return *elt; |
8b11009b ZD |
2323 | |
2324 | /* Find the tree label if it is present. */ | |
b8698a0f | 2325 | |
726a989a | 2326 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
a9b77cd1 | 2327 | { |
538dd0b7 DM |
2328 | glabel *lab_stmt; |
2329 | ||
2330 | lab_stmt = dyn_cast <glabel *> (gsi_stmt (gsi)); | |
2331 | if (!lab_stmt) | |
a9b77cd1 ZD |
2332 | break; |
2333 | ||
726a989a | 2334 | lab = gimple_label_label (lab_stmt); |
a9b77cd1 ZD |
2335 | if (DECL_NONLOCAL (lab)) |
2336 | break; | |
2337 | ||
1476d1bd | 2338 | return jump_target_rtx (lab); |
a9b77cd1 ZD |
2339 | } |
2340 | ||
19f8b229 | 2341 | rtx_code_label *l = gen_label_rtx (); |
39c8aaa4 TS |
2342 | lab_rtx_for_bb->put (bb, l); |
2343 | return l; | |
a9b77cd1 ZD |
2344 | } |
2345 | ||
726a989a | 2346 | |
529ff441 MM |
2347 | /* A subroutine of expand_gimple_cond. Given E, a fallthrough edge |
2348 | of a basic block where we just expanded the conditional at the end, | |
315adeda MM |
2349 | possibly clean up the CFG and instruction sequence. LAST is the |
2350 | last instruction before the just emitted jump sequence. */ | |
529ff441 MM |
2351 | |
2352 | static void | |
b47aae36 | 2353 | maybe_cleanup_end_of_block (edge e, rtx_insn *last) |
529ff441 MM |
2354 | { |
2355 | /* Special case: when jumpif decides that the condition is | |
2356 | trivial it emits an unconditional jump (and the necessary | |
2357 | barrier). But we still have two edges, the fallthru one is | |
2358 | wrong. purge_dead_edges would clean this up later. Unfortunately | |
2359 | we have to insert insns (and split edges) before | |
2360 | find_many_sub_basic_blocks and hence before purge_dead_edges. | |
2361 | But splitting edges might create new blocks which depend on the | |
2362 | fact that if there are two edges there's no barrier. So the | |
2363 | barrier would get lost and verify_flow_info would ICE. Instead | |
2364 | of auditing all edge splitters to care for the barrier (which | |
2365 | normally isn't there in a cleaned CFG), fix it here. */ | |
2366 | if (BARRIER_P (get_last_insn ())) | |
2367 | { | |
b47aae36 | 2368 | rtx_insn *insn; |
529ff441 MM |
2369 | remove_edge (e); |
2370 | /* Now, we have a single successor block, if we have insns to | |
2371 | insert on the remaining edge we potentially will insert | |
2372 | it at the end of this block (if the dest block isn't feasible) | |
2373 | in order to avoid splitting the edge. This insertion will take | |
2374 | place in front of the last jump. But we might have emitted | |
2375 | multiple jumps (conditional and one unconditional) to the | |
2376 | same destination. Inserting in front of the last one then | |
2377 | is a problem. See PR 40021. We fix this by deleting all | |
2378 | jumps except the last unconditional one. */ | |
2379 | insn = PREV_INSN (get_last_insn ()); | |
2380 | /* Make sure we have an unconditional jump. Otherwise we're | |
2381 | confused. */ | |
2382 | gcc_assert (JUMP_P (insn) && !any_condjump_p (insn)); | |
315adeda | 2383 | for (insn = PREV_INSN (insn); insn != last;) |
529ff441 MM |
2384 | { |
2385 | insn = PREV_INSN (insn); | |
2386 | if (JUMP_P (NEXT_INSN (insn))) | |
90eb3e33 | 2387 | { |
8a269cb7 | 2388 | if (!any_condjump_p (NEXT_INSN (insn))) |
90eb3e33 JJ |
2389 | { |
2390 | gcc_assert (BARRIER_P (NEXT_INSN (NEXT_INSN (insn)))); | |
2391 | delete_insn (NEXT_INSN (NEXT_INSN (insn))); | |
2392 | } | |
2393 | delete_insn (NEXT_INSN (insn)); | |
2394 | } | |
529ff441 MM |
2395 | } |
2396 | } | |
2397 | } | |
2398 | ||
726a989a | 2399 | /* A subroutine of expand_gimple_basic_block. Expand one GIMPLE_COND. |
80c7a9eb RH |
2400 | Returns a new basic block if we've terminated the current basic |
2401 | block and created a new one. */ | |
2402 | ||
2403 | static basic_block | |
538dd0b7 | 2404 | expand_gimple_cond (basic_block bb, gcond *stmt) |
80c7a9eb RH |
2405 | { |
2406 | basic_block new_bb, dest; | |
80c7a9eb RH |
2407 | edge true_edge; |
2408 | edge false_edge; | |
b47aae36 | 2409 | rtx_insn *last2, *last; |
28ed065e MM |
2410 | enum tree_code code; |
2411 | tree op0, op1; | |
2412 | ||
2413 | code = gimple_cond_code (stmt); | |
2414 | op0 = gimple_cond_lhs (stmt); | |
2415 | op1 = gimple_cond_rhs (stmt); | |
2416 | /* We're sometimes presented with such code: | |
2417 | D.123_1 = x < y; | |
2418 | if (D.123_1 != 0) | |
2419 | ... | |
2420 | This would expand to two comparisons which then later might | |
2421 | be cleaned up by combine. But some pattern matchers like if-conversion | |
2422 | work better when there's only one compare, so make up for this | |
2423 | here as special exception if TER would have made the same change. */ | |
31348d52 | 2424 | if (SA.values |
28ed065e | 2425 | && TREE_CODE (op0) == SSA_NAME |
31348d52 RB |
2426 | && TREE_CODE (TREE_TYPE (op0)) == BOOLEAN_TYPE |
2427 | && TREE_CODE (op1) == INTEGER_CST | |
2428 | && ((gimple_cond_code (stmt) == NE_EXPR | |
2429 | && integer_zerop (op1)) | |
2430 | || (gimple_cond_code (stmt) == EQ_EXPR | |
2431 | && integer_onep (op1))) | |
28ed065e MM |
2432 | && bitmap_bit_p (SA.values, SSA_NAME_VERSION (op0))) |
2433 | { | |
355fe088 | 2434 | gimple *second = SSA_NAME_DEF_STMT (op0); |
e83f4b68 | 2435 | if (gimple_code (second) == GIMPLE_ASSIGN) |
28ed065e | 2436 | { |
e83f4b68 MM |
2437 | enum tree_code code2 = gimple_assign_rhs_code (second); |
2438 | if (TREE_CODE_CLASS (code2) == tcc_comparison) | |
2439 | { | |
2440 | code = code2; | |
2441 | op0 = gimple_assign_rhs1 (second); | |
2442 | op1 = gimple_assign_rhs2 (second); | |
2443 | } | |
2d52a3a1 ZC |
2444 | /* If jumps are cheap and the target does not support conditional |
2445 | compare, turn some more codes into jumpy sequences. */ | |
2446 | else if (BRANCH_COST (optimize_insn_for_speed_p (), false) < 4 | |
2447 | && targetm.gen_ccmp_first == NULL) | |
e83f4b68 MM |
2448 | { |
2449 | if ((code2 == BIT_AND_EXPR | |
2450 | && TYPE_PRECISION (TREE_TYPE (op0)) == 1 | |
2451 | && TREE_CODE (gimple_assign_rhs2 (second)) != INTEGER_CST) | |
2452 | || code2 == TRUTH_AND_EXPR) | |
2453 | { | |
2454 | code = TRUTH_ANDIF_EXPR; | |
2455 | op0 = gimple_assign_rhs1 (second); | |
2456 | op1 = gimple_assign_rhs2 (second); | |
2457 | } | |
2458 | else if (code2 == BIT_IOR_EXPR || code2 == TRUTH_OR_EXPR) | |
2459 | { | |
2460 | code = TRUTH_ORIF_EXPR; | |
2461 | op0 = gimple_assign_rhs1 (second); | |
2462 | op1 = gimple_assign_rhs2 (second); | |
2463 | } | |
2464 | } | |
28ed065e MM |
2465 | } |
2466 | } | |
b7211528 SB |
2467 | |
2468 | last2 = last = get_last_insn (); | |
80c7a9eb RH |
2469 | |
2470 | extract_true_false_edges_from_block (bb, &true_edge, &false_edge); | |
5368224f | 2471 | set_curr_insn_location (gimple_location (stmt)); |
80c7a9eb RH |
2472 | |
2473 | /* These flags have no purpose in RTL land. */ | |
2474 | true_edge->flags &= ~EDGE_TRUE_VALUE; | |
2475 | false_edge->flags &= ~EDGE_FALSE_VALUE; | |
2476 | ||
2477 | /* We can either have a pure conditional jump with one fallthru edge or | |
2478 | two-way jump that needs to be decomposed into two basic blocks. */ | |
a9b77cd1 | 2479 | if (false_edge->dest == bb->next_bb) |
80c7a9eb | 2480 | { |
40e90eac JJ |
2481 | jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest), |
2482 | true_edge->probability); | |
726a989a | 2483 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
2f13f2de | 2484 | if (true_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2485 | set_curr_insn_location (true_edge->goto_locus); |
a9b77cd1 | 2486 | false_edge->flags |= EDGE_FALLTHRU; |
315adeda | 2487 | maybe_cleanup_end_of_block (false_edge, last); |
80c7a9eb RH |
2488 | return NULL; |
2489 | } | |
a9b77cd1 | 2490 | if (true_edge->dest == bb->next_bb) |
80c7a9eb | 2491 | { |
40e90eac JJ |
2492 | jumpifnot_1 (code, op0, op1, label_rtx_for_bb (false_edge->dest), |
2493 | false_edge->probability); | |
726a989a | 2494 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
2f13f2de | 2495 | if (false_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2496 | set_curr_insn_location (false_edge->goto_locus); |
a9b77cd1 | 2497 | true_edge->flags |= EDGE_FALLTHRU; |
315adeda | 2498 | maybe_cleanup_end_of_block (true_edge, last); |
80c7a9eb RH |
2499 | return NULL; |
2500 | } | |
80c7a9eb | 2501 | |
40e90eac JJ |
2502 | jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest), |
2503 | true_edge->probability); | |
80c7a9eb | 2504 | last = get_last_insn (); |
2f13f2de | 2505 | if (false_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2506 | set_curr_insn_location (false_edge->goto_locus); |
a9b77cd1 | 2507 | emit_jump (label_rtx_for_bb (false_edge->dest)); |
80c7a9eb | 2508 | |
1130d5e3 | 2509 | BB_END (bb) = last; |
80c7a9eb | 2510 | if (BARRIER_P (BB_END (bb))) |
1130d5e3 | 2511 | BB_END (bb) = PREV_INSN (BB_END (bb)); |
80c7a9eb RH |
2512 | update_bb_for_insn (bb); |
2513 | ||
2514 | new_bb = create_basic_block (NEXT_INSN (last), get_last_insn (), bb); | |
2515 | dest = false_edge->dest; | |
2516 | redirect_edge_succ (false_edge, new_bb); | |
2517 | false_edge->flags |= EDGE_FALLTHRU; | |
ef30ab83 | 2518 | new_bb->count = false_edge->count (); |
80c7a9eb | 2519 | new_bb->frequency = EDGE_FREQUENCY (false_edge); |
ba7629e2 RB |
2520 | loop_p loop = find_common_loop (bb->loop_father, dest->loop_father); |
2521 | add_bb_to_loop (new_bb, loop); | |
2522 | if (loop->latch == bb | |
2523 | && loop->header == dest) | |
2524 | loop->latch = new_bb; | |
357067f2 | 2525 | make_single_succ_edge (new_bb, dest, 0); |
80c7a9eb | 2526 | if (BARRIER_P (BB_END (new_bb))) |
1130d5e3 | 2527 | BB_END (new_bb) = PREV_INSN (BB_END (new_bb)); |
80c7a9eb RH |
2528 | update_bb_for_insn (new_bb); |
2529 | ||
726a989a | 2530 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
c22cacf3 | 2531 | |
2f13f2de | 2532 | if (true_edge->goto_locus != UNKNOWN_LOCATION) |
7787b4aa | 2533 | { |
5368224f DC |
2534 | set_curr_insn_location (true_edge->goto_locus); |
2535 | true_edge->goto_locus = curr_insn_location (); | |
7787b4aa | 2536 | } |
7787b4aa | 2537 | |
80c7a9eb RH |
2538 | return new_bb; |
2539 | } | |
2540 | ||
0a35513e AH |
2541 | /* Mark all calls that can have a transaction restart. */ |
2542 | ||
2543 | static void | |
355fe088 | 2544 | mark_transaction_restart_calls (gimple *stmt) |
0a35513e AH |
2545 | { |
2546 | struct tm_restart_node dummy; | |
50979347 | 2547 | tm_restart_node **slot; |
0a35513e AH |
2548 | |
2549 | if (!cfun->gimple_df->tm_restart) | |
2550 | return; | |
2551 | ||
2552 | dummy.stmt = stmt; | |
50979347 | 2553 | slot = cfun->gimple_df->tm_restart->find_slot (&dummy, NO_INSERT); |
0a35513e AH |
2554 | if (slot) |
2555 | { | |
50979347 | 2556 | struct tm_restart_node *n = *slot; |
0a35513e | 2557 | tree list = n->label_or_list; |
b47aae36 | 2558 | rtx_insn *insn; |
0a35513e AH |
2559 | |
2560 | for (insn = next_real_insn (get_last_insn ()); | |
2561 | !CALL_P (insn); | |
2562 | insn = next_real_insn (insn)) | |
2563 | continue; | |
2564 | ||
2565 | if (TREE_CODE (list) == LABEL_DECL) | |
2566 | add_reg_note (insn, REG_TM, label_rtx (list)); | |
2567 | else | |
2568 | for (; list ; list = TREE_CHAIN (list)) | |
2569 | add_reg_note (insn, REG_TM, label_rtx (TREE_VALUE (list))); | |
2570 | } | |
2571 | } | |
2572 | ||
28ed065e MM |
2573 | /* A subroutine of expand_gimple_stmt_1, expanding one GIMPLE_CALL |
2574 | statement STMT. */ | |
2575 | ||
2576 | static void | |
538dd0b7 | 2577 | expand_call_stmt (gcall *stmt) |
28ed065e | 2578 | { |
25583c4f | 2579 | tree exp, decl, lhs; |
e23817b3 | 2580 | bool builtin_p; |
e7925582 | 2581 | size_t i; |
28ed065e | 2582 | |
25583c4f RS |
2583 | if (gimple_call_internal_p (stmt)) |
2584 | { | |
2585 | expand_internal_call (stmt); | |
2586 | return; | |
2587 | } | |
2588 | ||
4cfe7a6c RS |
2589 | /* If this is a call to a built-in function and it has no effect other |
2590 | than setting the lhs, try to implement it using an internal function | |
2591 | instead. */ | |
2592 | decl = gimple_call_fndecl (stmt); | |
2593 | if (gimple_call_lhs (stmt) | |
2594 | && !gimple_has_side_effects (stmt) | |
2595 | && (optimize || (decl && called_as_built_in (decl)))) | |
2596 | { | |
2597 | internal_fn ifn = replacement_internal_fn (stmt); | |
2598 | if (ifn != IFN_LAST) | |
2599 | { | |
2600 | expand_internal_call (ifn, stmt); | |
2601 | return; | |
2602 | } | |
2603 | } | |
2604 | ||
01156003 | 2605 | exp = build_vl_exp (CALL_EXPR, gimple_call_num_args (stmt) + 3); |
089d1227 | 2606 | |
01156003 | 2607 | CALL_EXPR_FN (exp) = gimple_call_fn (stmt); |
089d1227 | 2608 | builtin_p = decl && DECL_BUILT_IN (decl); |
01156003 | 2609 | |
e7925582 EB |
2610 | /* If this is not a builtin function, the function type through which the |
2611 | call is made may be different from the type of the function. */ | |
2612 | if (!builtin_p) | |
2613 | CALL_EXPR_FN (exp) | |
b25aa0e8 EB |
2614 | = fold_convert (build_pointer_type (gimple_call_fntype (stmt)), |
2615 | CALL_EXPR_FN (exp)); | |
e7925582 | 2616 | |
28ed065e MM |
2617 | TREE_TYPE (exp) = gimple_call_return_type (stmt); |
2618 | CALL_EXPR_STATIC_CHAIN (exp) = gimple_call_chain (stmt); | |
2619 | ||
2620 | for (i = 0; i < gimple_call_num_args (stmt); i++) | |
e23817b3 RG |
2621 | { |
2622 | tree arg = gimple_call_arg (stmt, i); | |
355fe088 | 2623 | gimple *def; |
e23817b3 RG |
2624 | /* TER addresses into arguments of builtin functions so we have a |
2625 | chance to infer more correct alignment information. See PR39954. */ | |
2626 | if (builtin_p | |
2627 | && TREE_CODE (arg) == SSA_NAME | |
2628 | && (def = get_gimple_for_ssa_name (arg)) | |
2629 | && gimple_assign_rhs_code (def) == ADDR_EXPR) | |
2630 | arg = gimple_assign_rhs1 (def); | |
2631 | CALL_EXPR_ARG (exp, i) = arg; | |
2632 | } | |
28ed065e | 2633 | |
93f28ca7 | 2634 | if (gimple_has_side_effects (stmt)) |
28ed065e MM |
2635 | TREE_SIDE_EFFECTS (exp) = 1; |
2636 | ||
93f28ca7 | 2637 | if (gimple_call_nothrow_p (stmt)) |
28ed065e MM |
2638 | TREE_NOTHROW (exp) = 1; |
2639 | ||
2640 | CALL_EXPR_TAILCALL (exp) = gimple_call_tail_p (stmt); | |
9a385c2d | 2641 | CALL_EXPR_MUST_TAIL_CALL (exp) = gimple_call_must_tail_p (stmt); |
28ed065e | 2642 | CALL_EXPR_RETURN_SLOT_OPT (exp) = gimple_call_return_slot_opt_p (stmt); |
63d2a353 MM |
2643 | if (decl |
2644 | && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL | |
9e878cf1 | 2645 | && ALLOCA_FUNCTION_CODE_P (DECL_FUNCTION_CODE (decl))) |
63d2a353 MM |
2646 | CALL_ALLOCA_FOR_VAR_P (exp) = gimple_call_alloca_for_var_p (stmt); |
2647 | else | |
2648 | CALL_FROM_THUNK_P (exp) = gimple_call_from_thunk_p (stmt); | |
28ed065e | 2649 | CALL_EXPR_VA_ARG_PACK (exp) = gimple_call_va_arg_pack_p (stmt); |
4c640e26 | 2650 | CALL_EXPR_BY_DESCRIPTOR (exp) = gimple_call_by_descriptor_p (stmt); |
28ed065e | 2651 | SET_EXPR_LOCATION (exp, gimple_location (stmt)); |
d5e254e1 | 2652 | CALL_WITH_BOUNDS_P (exp) = gimple_call_with_bounds_p (stmt); |
28ed065e | 2653 | |
ddb555ed JJ |
2654 | /* Ensure RTL is created for debug args. */ |
2655 | if (decl && DECL_HAS_DEBUG_ARGS_P (decl)) | |
2656 | { | |
9771b263 | 2657 | vec<tree, va_gc> **debug_args = decl_debug_args_lookup (decl); |
ddb555ed JJ |
2658 | unsigned int ix; |
2659 | tree dtemp; | |
2660 | ||
2661 | if (debug_args) | |
9771b263 | 2662 | for (ix = 1; (*debug_args)->iterate (ix, &dtemp); ix += 2) |
ddb555ed JJ |
2663 | { |
2664 | gcc_assert (TREE_CODE (dtemp) == DEBUG_EXPR_DECL); | |
2665 | expand_debug_expr (dtemp); | |
2666 | } | |
2667 | } | |
2668 | ||
5c5f0b65 | 2669 | rtx_insn *before_call = get_last_insn (); |
25583c4f | 2670 | lhs = gimple_call_lhs (stmt); |
28ed065e MM |
2671 | if (lhs) |
2672 | expand_assignment (lhs, exp, false); | |
2673 | else | |
4c437f02 | 2674 | expand_expr (exp, const0_rtx, VOIDmode, EXPAND_NORMAL); |
0a35513e | 2675 | |
5c5f0b65 IT |
2676 | /* If the gimple call is an indirect call and has 'nocf_check' |
2677 | attribute find a generated CALL insn to mark it as no | |
2678 | control-flow verification is needed. */ | |
2679 | if (gimple_call_nocf_check_p (stmt) | |
2680 | && !gimple_call_fndecl (stmt)) | |
2681 | { | |
2682 | rtx_insn *last = get_last_insn (); | |
2683 | while (!CALL_P (last) | |
2684 | && last != before_call) | |
2685 | last = PREV_INSN (last); | |
2686 | ||
2687 | if (last != before_call) | |
2688 | add_reg_note (last, REG_CALL_NOCF_CHECK, const0_rtx); | |
2689 | } | |
2690 | ||
0a35513e | 2691 | mark_transaction_restart_calls (stmt); |
28ed065e MM |
2692 | } |
2693 | ||
862d0b35 DN |
2694 | |
2695 | /* Generate RTL for an asm statement (explicit assembler code). | |
2696 | STRING is a STRING_CST node containing the assembler code text, | |
2697 | or an ADDR_EXPR containing a STRING_CST. VOL nonzero means the | |
2698 | insn is volatile; don't optimize it. */ | |
2699 | ||
2700 | static void | |
2701 | expand_asm_loc (tree string, int vol, location_t locus) | |
2702 | { | |
2703 | rtx body; | |
2704 | ||
862d0b35 DN |
2705 | body = gen_rtx_ASM_INPUT_loc (VOIDmode, |
2706 | ggc_strdup (TREE_STRING_POINTER (string)), | |
2707 | locus); | |
2708 | ||
2709 | MEM_VOLATILE_P (body) = vol; | |
2710 | ||
93671519 BE |
2711 | /* Non-empty basic ASM implicitly clobbers memory. */ |
2712 | if (TREE_STRING_LENGTH (string) != 0) | |
2713 | { | |
2714 | rtx asm_op, clob; | |
2715 | unsigned i, nclobbers; | |
2716 | auto_vec<rtx> input_rvec, output_rvec; | |
2717 | auto_vec<const char *> constraints; | |
2718 | auto_vec<rtx> clobber_rvec; | |
2719 | HARD_REG_SET clobbered_regs; | |
2720 | CLEAR_HARD_REG_SET (clobbered_regs); | |
2721 | ||
2722 | clob = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode)); | |
2723 | clobber_rvec.safe_push (clob); | |
2724 | ||
2725 | if (targetm.md_asm_adjust) | |
2726 | targetm.md_asm_adjust (output_rvec, input_rvec, | |
2727 | constraints, clobber_rvec, | |
2728 | clobbered_regs); | |
2729 | ||
2730 | asm_op = body; | |
2731 | nclobbers = clobber_rvec.length (); | |
2732 | body = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (1 + nclobbers)); | |
2733 | ||
2734 | XVECEXP (body, 0, 0) = asm_op; | |
2735 | for (i = 0; i < nclobbers; i++) | |
2736 | XVECEXP (body, 0, i + 1) = gen_rtx_CLOBBER (VOIDmode, clobber_rvec[i]); | |
2737 | } | |
2738 | ||
862d0b35 DN |
2739 | emit_insn (body); |
2740 | } | |
2741 | ||
2742 | /* Return the number of times character C occurs in string S. */ | |
2743 | static int | |
2744 | n_occurrences (int c, const char *s) | |
2745 | { | |
2746 | int n = 0; | |
2747 | while (*s) | |
2748 | n += (*s++ == c); | |
2749 | return n; | |
2750 | } | |
2751 | ||
2752 | /* A subroutine of expand_asm_operands. Check that all operands have | |
2753 | the same number of alternatives. Return true if so. */ | |
2754 | ||
2755 | static bool | |
7ca35180 | 2756 | check_operand_nalternatives (const vec<const char *> &constraints) |
862d0b35 | 2757 | { |
7ca35180 RH |
2758 | unsigned len = constraints.length(); |
2759 | if (len > 0) | |
862d0b35 | 2760 | { |
7ca35180 | 2761 | int nalternatives = n_occurrences (',', constraints[0]); |
862d0b35 DN |
2762 | |
2763 | if (nalternatives + 1 > MAX_RECOG_ALTERNATIVES) | |
2764 | { | |
2765 | error ("too many alternatives in %<asm%>"); | |
2766 | return false; | |
2767 | } | |
2768 | ||
7ca35180 RH |
2769 | for (unsigned i = 1; i < len; ++i) |
2770 | if (n_occurrences (',', constraints[i]) != nalternatives) | |
2771 | { | |
2772 | error ("operand constraints for %<asm%> differ " | |
2773 | "in number of alternatives"); | |
2774 | return false; | |
2775 | } | |
862d0b35 | 2776 | } |
862d0b35 DN |
2777 | return true; |
2778 | } | |
2779 | ||
2780 | /* Check for overlap between registers marked in CLOBBERED_REGS and | |
2781 | anything inappropriate in T. Emit error and return the register | |
2782 | variable definition for error, NULL_TREE for ok. */ | |
2783 | ||
2784 | static bool | |
2785 | tree_conflicts_with_clobbers_p (tree t, HARD_REG_SET *clobbered_regs) | |
2786 | { | |
2787 | /* Conflicts between asm-declared register variables and the clobber | |
2788 | list are not allowed. */ | |
2789 | tree overlap = tree_overlaps_hard_reg_set (t, clobbered_regs); | |
2790 | ||
2791 | if (overlap) | |
2792 | { | |
2793 | error ("asm-specifier for variable %qE conflicts with asm clobber list", | |
2794 | DECL_NAME (overlap)); | |
2795 | ||
2796 | /* Reset registerness to stop multiple errors emitted for a single | |
2797 | variable. */ | |
2798 | DECL_REGISTER (overlap) = 0; | |
2799 | return true; | |
2800 | } | |
2801 | ||
2802 | return false; | |
2803 | } | |
2804 | ||
2805 | /* Generate RTL for an asm statement with arguments. | |
2806 | STRING is the instruction template. | |
2807 | OUTPUTS is a list of output arguments (lvalues); INPUTS a list of inputs. | |
2808 | Each output or input has an expression in the TREE_VALUE and | |
2809 | a tree list in TREE_PURPOSE which in turn contains a constraint | |
2810 | name in TREE_VALUE (or NULL_TREE) and a constraint string | |
2811 | in TREE_PURPOSE. | |
2812 | CLOBBERS is a list of STRING_CST nodes each naming a hard register | |
2813 | that is clobbered by this insn. | |
2814 | ||
2815 | LABELS is a list of labels, and if LABELS is non-NULL, FALLTHRU_BB | |
2816 | should be the fallthru basic block of the asm goto. | |
2817 | ||
2818 | Not all kinds of lvalue that may appear in OUTPUTS can be stored directly. | |
2819 | Some elements of OUTPUTS may be replaced with trees representing temporary | |
2820 | values. The caller should copy those temporary values to the originally | |
2821 | specified lvalues. | |
2822 | ||
2823 | VOL nonzero means the insn is volatile; don't optimize it. */ | |
2824 | ||
2825 | static void | |
6476a8fd | 2826 | expand_asm_stmt (gasm *stmt) |
862d0b35 | 2827 | { |
7ca35180 RH |
2828 | class save_input_location |
2829 | { | |
2830 | location_t old; | |
6476a8fd | 2831 | |
7ca35180 RH |
2832 | public: |
2833 | explicit save_input_location(location_t where) | |
6476a8fd | 2834 | { |
7ca35180 RH |
2835 | old = input_location; |
2836 | input_location = where; | |
6476a8fd RH |
2837 | } |
2838 | ||
7ca35180 | 2839 | ~save_input_location() |
6476a8fd | 2840 | { |
7ca35180 | 2841 | input_location = old; |
6476a8fd | 2842 | } |
7ca35180 | 2843 | }; |
6476a8fd | 2844 | |
7ca35180 | 2845 | location_t locus = gimple_location (stmt); |
6476a8fd | 2846 | |
7ca35180 | 2847 | if (gimple_asm_input_p (stmt)) |
6476a8fd | 2848 | { |
7ca35180 RH |
2849 | const char *s = gimple_asm_string (stmt); |
2850 | tree string = build_string (strlen (s), s); | |
2851 | expand_asm_loc (string, gimple_asm_volatile_p (stmt), locus); | |
2852 | return; | |
6476a8fd RH |
2853 | } |
2854 | ||
7ca35180 RH |
2855 | /* There are some legacy diagnostics in here, and also avoids a |
2856 | sixth parameger to targetm.md_asm_adjust. */ | |
2857 | save_input_location s_i_l(locus); | |
6476a8fd | 2858 | |
7ca35180 RH |
2859 | unsigned noutputs = gimple_asm_noutputs (stmt); |
2860 | unsigned ninputs = gimple_asm_ninputs (stmt); | |
2861 | unsigned nlabels = gimple_asm_nlabels (stmt); | |
2862 | unsigned i; | |
2863 | ||
2864 | /* ??? Diagnose during gimplification? */ | |
2865 | if (ninputs + noutputs + nlabels > MAX_RECOG_OPERANDS) | |
6476a8fd | 2866 | { |
7ca35180 | 2867 | error ("more than %d operands in %<asm%>", MAX_RECOG_OPERANDS); |
6476a8fd RH |
2868 | return; |
2869 | } | |
2870 | ||
7ca35180 RH |
2871 | auto_vec<tree, MAX_RECOG_OPERANDS> output_tvec; |
2872 | auto_vec<tree, MAX_RECOG_OPERANDS> input_tvec; | |
2873 | auto_vec<const char *, MAX_RECOG_OPERANDS> constraints; | |
6476a8fd | 2874 | |
7ca35180 | 2875 | /* Copy the gimple vectors into new vectors that we can manipulate. */ |
862d0b35 | 2876 | |
7ca35180 RH |
2877 | output_tvec.safe_grow (noutputs); |
2878 | input_tvec.safe_grow (ninputs); | |
2879 | constraints.safe_grow (noutputs + ninputs); | |
862d0b35 | 2880 | |
7ca35180 RH |
2881 | for (i = 0; i < noutputs; ++i) |
2882 | { | |
2883 | tree t = gimple_asm_output_op (stmt, i); | |
2884 | output_tvec[i] = TREE_VALUE (t); | |
2885 | constraints[i] = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); | |
2886 | } | |
2887 | for (i = 0; i < ninputs; i++) | |
2888 | { | |
2889 | tree t = gimple_asm_input_op (stmt, i); | |
2890 | input_tvec[i] = TREE_VALUE (t); | |
2891 | constraints[i + noutputs] | |
2892 | = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); | |
2893 | } | |
862d0b35 | 2894 | |
7ca35180 RH |
2895 | /* ??? Diagnose during gimplification? */ |
2896 | if (! check_operand_nalternatives (constraints)) | |
2897 | return; | |
862d0b35 DN |
2898 | |
2899 | /* Count the number of meaningful clobbered registers, ignoring what | |
2900 | we would ignore later. */ | |
7ca35180 RH |
2901 | auto_vec<rtx> clobber_rvec; |
2902 | HARD_REG_SET clobbered_regs; | |
862d0b35 | 2903 | CLEAR_HARD_REG_SET (clobbered_regs); |
862d0b35 | 2904 | |
7ca35180 RH |
2905 | if (unsigned n = gimple_asm_nclobbers (stmt)) |
2906 | { | |
2907 | clobber_rvec.reserve (n); | |
2908 | for (i = 0; i < n; i++) | |
2909 | { | |
2910 | tree t = gimple_asm_clobber_op (stmt, i); | |
2911 | const char *regname = TREE_STRING_POINTER (TREE_VALUE (t)); | |
2912 | int nregs, j; | |
862d0b35 | 2913 | |
7ca35180 RH |
2914 | j = decode_reg_name_and_count (regname, &nregs); |
2915 | if (j < 0) | |
862d0b35 | 2916 | { |
7ca35180 | 2917 | if (j == -2) |
862d0b35 | 2918 | { |
7ca35180 RH |
2919 | /* ??? Diagnose during gimplification? */ |
2920 | error ("unknown register name %qs in %<asm%>", regname); | |
2921 | } | |
2922 | else if (j == -4) | |
2923 | { | |
2924 | rtx x = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode)); | |
2925 | clobber_rvec.safe_push (x); | |
2926 | } | |
2927 | else | |
2928 | { | |
2929 | /* Otherwise we should have -1 == empty string | |
2930 | or -3 == cc, which is not a register. */ | |
2931 | gcc_assert (j == -1 || j == -3); | |
862d0b35 | 2932 | } |
862d0b35 | 2933 | } |
7ca35180 RH |
2934 | else |
2935 | for (int reg = j; reg < j + nregs; reg++) | |
2936 | { | |
2937 | /* Clobbering the PIC register is an error. */ | |
2938 | if (reg == (int) PIC_OFFSET_TABLE_REGNUM) | |
2939 | { | |
2940 | /* ??? Diagnose during gimplification? */ | |
2941 | error ("PIC register clobbered by %qs in %<asm%>", | |
2942 | regname); | |
2943 | return; | |
2944 | } | |
2945 | ||
2946 | SET_HARD_REG_BIT (clobbered_regs, reg); | |
2947 | rtx x = gen_rtx_REG (reg_raw_mode[reg], reg); | |
2948 | clobber_rvec.safe_push (x); | |
2949 | } | |
862d0b35 DN |
2950 | } |
2951 | } | |
7ca35180 | 2952 | unsigned nclobbers = clobber_rvec.length(); |
862d0b35 DN |
2953 | |
2954 | /* First pass over inputs and outputs checks validity and sets | |
2955 | mark_addressable if needed. */ | |
7ca35180 | 2956 | /* ??? Diagnose during gimplification? */ |
862d0b35 | 2957 | |
7ca35180 | 2958 | for (i = 0; i < noutputs; ++i) |
862d0b35 | 2959 | { |
7ca35180 | 2960 | tree val = output_tvec[i]; |
862d0b35 DN |
2961 | tree type = TREE_TYPE (val); |
2962 | const char *constraint; | |
2963 | bool is_inout; | |
2964 | bool allows_reg; | |
2965 | bool allows_mem; | |
2966 | ||
862d0b35 DN |
2967 | /* Try to parse the output constraint. If that fails, there's |
2968 | no point in going further. */ | |
2969 | constraint = constraints[i]; | |
2970 | if (!parse_output_constraint (&constraint, i, ninputs, noutputs, | |
2971 | &allows_mem, &allows_reg, &is_inout)) | |
2972 | return; | |
2973 | ||
2974 | if (! allows_reg | |
2975 | && (allows_mem | |
2976 | || is_inout | |
2977 | || (DECL_P (val) | |
2978 | && REG_P (DECL_RTL (val)) | |
2979 | && GET_MODE (DECL_RTL (val)) != TYPE_MODE (type)))) | |
2980 | mark_addressable (val); | |
862d0b35 DN |
2981 | } |
2982 | ||
7ca35180 | 2983 | for (i = 0; i < ninputs; ++i) |
862d0b35 DN |
2984 | { |
2985 | bool allows_reg, allows_mem; | |
2986 | const char *constraint; | |
2987 | ||
862d0b35 | 2988 | constraint = constraints[i + noutputs]; |
7ca35180 RH |
2989 | if (! parse_input_constraint (&constraint, i, ninputs, noutputs, 0, |
2990 | constraints.address (), | |
2991 | &allows_mem, &allows_reg)) | |
862d0b35 DN |
2992 | return; |
2993 | ||
2994 | if (! allows_reg && allows_mem) | |
7ca35180 | 2995 | mark_addressable (input_tvec[i]); |
862d0b35 DN |
2996 | } |
2997 | ||
2998 | /* Second pass evaluates arguments. */ | |
2999 | ||
3000 | /* Make sure stack is consistent for asm goto. */ | |
3001 | if (nlabels > 0) | |
3002 | do_pending_stack_adjust (); | |
7ca35180 RH |
3003 | int old_generating_concat_p = generating_concat_p; |
3004 | ||
3005 | /* Vector of RTX's of evaluated output operands. */ | |
3006 | auto_vec<rtx, MAX_RECOG_OPERANDS> output_rvec; | |
3007 | auto_vec<int, MAX_RECOG_OPERANDS> inout_opnum; | |
3008 | rtx_insn *after_rtl_seq = NULL, *after_rtl_end = NULL; | |
862d0b35 | 3009 | |
7ca35180 RH |
3010 | output_rvec.safe_grow (noutputs); |
3011 | ||
3012 | for (i = 0; i < noutputs; ++i) | |
862d0b35 | 3013 | { |
7ca35180 | 3014 | tree val = output_tvec[i]; |
862d0b35 | 3015 | tree type = TREE_TYPE (val); |
7ca35180 | 3016 | bool is_inout, allows_reg, allows_mem, ok; |
862d0b35 | 3017 | rtx op; |
862d0b35 DN |
3018 | |
3019 | ok = parse_output_constraint (&constraints[i], i, ninputs, | |
3020 | noutputs, &allows_mem, &allows_reg, | |
3021 | &is_inout); | |
3022 | gcc_assert (ok); | |
3023 | ||
3024 | /* If an output operand is not a decl or indirect ref and our constraint | |
3025 | allows a register, make a temporary to act as an intermediate. | |
7ca35180 | 3026 | Make the asm insn write into that, then we will copy it to |
862d0b35 DN |
3027 | the real output operand. Likewise for promoted variables. */ |
3028 | ||
3029 | generating_concat_p = 0; | |
3030 | ||
862d0b35 DN |
3031 | if ((TREE_CODE (val) == INDIRECT_REF |
3032 | && allows_mem) | |
3033 | || (DECL_P (val) | |
3034 | && (allows_mem || REG_P (DECL_RTL (val))) | |
3035 | && ! (REG_P (DECL_RTL (val)) | |
3036 | && GET_MODE (DECL_RTL (val)) != TYPE_MODE (type))) | |
3037 | || ! allows_reg | |
3038 | || is_inout) | |
3039 | { | |
3040 | op = expand_expr (val, NULL_RTX, VOIDmode, | |
3041 | !allows_reg ? EXPAND_MEMORY : EXPAND_WRITE); | |
3042 | if (MEM_P (op)) | |
3043 | op = validize_mem (op); | |
3044 | ||
3045 | if (! allows_reg && !MEM_P (op)) | |
3046 | error ("output number %d not directly addressable", i); | |
3047 | if ((! allows_mem && MEM_P (op)) | |
3048 | || GET_CODE (op) == CONCAT) | |
3049 | { | |
7ca35180 | 3050 | rtx old_op = op; |
862d0b35 | 3051 | op = gen_reg_rtx (GET_MODE (op)); |
7ca35180 RH |
3052 | |
3053 | generating_concat_p = old_generating_concat_p; | |
3054 | ||
862d0b35 | 3055 | if (is_inout) |
7ca35180 RH |
3056 | emit_move_insn (op, old_op); |
3057 | ||
3058 | push_to_sequence2 (after_rtl_seq, after_rtl_end); | |
3059 | emit_move_insn (old_op, op); | |
3060 | after_rtl_seq = get_insns (); | |
3061 | after_rtl_end = get_last_insn (); | |
3062 | end_sequence (); | |
862d0b35 DN |
3063 | } |
3064 | } | |
3065 | else | |
3066 | { | |
3067 | op = assign_temp (type, 0, 1); | |
3068 | op = validize_mem (op); | |
7ca35180 RH |
3069 | if (!MEM_P (op) && TREE_CODE (val) == SSA_NAME) |
3070 | set_reg_attrs_for_decl_rtl (SSA_NAME_VAR (val), op); | |
862d0b35 | 3071 | |
7ca35180 | 3072 | generating_concat_p = old_generating_concat_p; |
862d0b35 | 3073 | |
7ca35180 RH |
3074 | push_to_sequence2 (after_rtl_seq, after_rtl_end); |
3075 | expand_assignment (val, make_tree (type, op), false); | |
3076 | after_rtl_seq = get_insns (); | |
3077 | after_rtl_end = get_last_insn (); | |
3078 | end_sequence (); | |
862d0b35 | 3079 | } |
7ca35180 | 3080 | output_rvec[i] = op; |
862d0b35 | 3081 | |
7ca35180 RH |
3082 | if (is_inout) |
3083 | inout_opnum.safe_push (i); | |
862d0b35 DN |
3084 | } |
3085 | ||
7ca35180 RH |
3086 | auto_vec<rtx, MAX_RECOG_OPERANDS> input_rvec; |
3087 | auto_vec<machine_mode, MAX_RECOG_OPERANDS> input_mode; | |
862d0b35 | 3088 | |
7ca35180 RH |
3089 | input_rvec.safe_grow (ninputs); |
3090 | input_mode.safe_grow (ninputs); | |
862d0b35 | 3091 | |
7ca35180 | 3092 | generating_concat_p = 0; |
862d0b35 | 3093 | |
7ca35180 | 3094 | for (i = 0; i < ninputs; ++i) |
862d0b35 | 3095 | { |
7ca35180 RH |
3096 | tree val = input_tvec[i]; |
3097 | tree type = TREE_TYPE (val); | |
3098 | bool allows_reg, allows_mem, ok; | |
862d0b35 | 3099 | const char *constraint; |
862d0b35 | 3100 | rtx op; |
862d0b35 DN |
3101 | |
3102 | constraint = constraints[i + noutputs]; | |
7ca35180 RH |
3103 | ok = parse_input_constraint (&constraint, i, ninputs, noutputs, 0, |
3104 | constraints.address (), | |
3105 | &allows_mem, &allows_reg); | |
862d0b35 DN |
3106 | gcc_assert (ok); |
3107 | ||
862d0b35 DN |
3108 | /* EXPAND_INITIALIZER will not generate code for valid initializer |
3109 | constants, but will still generate code for other types of operand. | |
3110 | This is the behavior we want for constant constraints. */ | |
3111 | op = expand_expr (val, NULL_RTX, VOIDmode, | |
3112 | allows_reg ? EXPAND_NORMAL | |
3113 | : allows_mem ? EXPAND_MEMORY | |
3114 | : EXPAND_INITIALIZER); | |
3115 | ||
3116 | /* Never pass a CONCAT to an ASM. */ | |
3117 | if (GET_CODE (op) == CONCAT) | |
3118 | op = force_reg (GET_MODE (op), op); | |
3119 | else if (MEM_P (op)) | |
3120 | op = validize_mem (op); | |
3121 | ||
3122 | if (asm_operand_ok (op, constraint, NULL) <= 0) | |
3123 | { | |
3124 | if (allows_reg && TYPE_MODE (type) != BLKmode) | |
3125 | op = force_reg (TYPE_MODE (type), op); | |
3126 | else if (!allows_mem) | |
3127 | warning (0, "asm operand %d probably doesn%'t match constraints", | |
3128 | i + noutputs); | |
3129 | else if (MEM_P (op)) | |
3130 | { | |
3131 | /* We won't recognize either volatile memory or memory | |
3132 | with a queued address as available a memory_operand | |
3133 | at this point. Ignore it: clearly this *is* a memory. */ | |
3134 | } | |
3135 | else | |
3136 | gcc_unreachable (); | |
3137 | } | |
7ca35180 RH |
3138 | input_rvec[i] = op; |
3139 | input_mode[i] = TYPE_MODE (type); | |
862d0b35 DN |
3140 | } |
3141 | ||
862d0b35 | 3142 | /* For in-out operands, copy output rtx to input rtx. */ |
7ca35180 | 3143 | unsigned ninout = inout_opnum.length(); |
862d0b35 DN |
3144 | for (i = 0; i < ninout; i++) |
3145 | { | |
3146 | int j = inout_opnum[i]; | |
7ca35180 | 3147 | rtx o = output_rvec[j]; |
862d0b35 | 3148 | |
7ca35180 RH |
3149 | input_rvec.safe_push (o); |
3150 | input_mode.safe_push (GET_MODE (o)); | |
862d0b35 | 3151 | |
7ca35180 | 3152 | char buffer[16]; |
862d0b35 | 3153 | sprintf (buffer, "%d", j); |
7ca35180 RH |
3154 | constraints.safe_push (ggc_strdup (buffer)); |
3155 | } | |
3156 | ninputs += ninout; | |
3157 | ||
3158 | /* Sometimes we wish to automatically clobber registers across an asm. | |
3159 | Case in point is when the i386 backend moved from cc0 to a hard reg -- | |
3160 | maintaining source-level compatibility means automatically clobbering | |
3161 | the flags register. */ | |
3162 | rtx_insn *after_md_seq = NULL; | |
3163 | if (targetm.md_asm_adjust) | |
3164 | after_md_seq = targetm.md_asm_adjust (output_rvec, input_rvec, | |
3165 | constraints, clobber_rvec, | |
3166 | clobbered_regs); | |
3167 | ||
3168 | /* Do not allow the hook to change the output and input count, | |
3169 | lest it mess up the operand numbering. */ | |
3170 | gcc_assert (output_rvec.length() == noutputs); | |
3171 | gcc_assert (input_rvec.length() == ninputs); | |
3172 | gcc_assert (constraints.length() == noutputs + ninputs); | |
3173 | ||
3174 | /* But it certainly can adjust the clobbers. */ | |
3175 | nclobbers = clobber_rvec.length(); | |
3176 | ||
3177 | /* Third pass checks for easy conflicts. */ | |
3178 | /* ??? Why are we doing this on trees instead of rtx. */ | |
3179 | ||
3180 | bool clobber_conflict_found = 0; | |
3181 | for (i = 0; i < noutputs; ++i) | |
3182 | if (tree_conflicts_with_clobbers_p (output_tvec[i], &clobbered_regs)) | |
3183 | clobber_conflict_found = 1; | |
3184 | for (i = 0; i < ninputs - ninout; ++i) | |
3185 | if (tree_conflicts_with_clobbers_p (input_tvec[i], &clobbered_regs)) | |
3186 | clobber_conflict_found = 1; | |
3187 | ||
3188 | /* Make vectors for the expression-rtx, constraint strings, | |
3189 | and named operands. */ | |
3190 | ||
3191 | rtvec argvec = rtvec_alloc (ninputs); | |
3192 | rtvec constraintvec = rtvec_alloc (ninputs); | |
3193 | rtvec labelvec = rtvec_alloc (nlabels); | |
3194 | ||
3195 | rtx body = gen_rtx_ASM_OPERANDS ((noutputs == 0 ? VOIDmode | |
3196 | : GET_MODE (output_rvec[0])), | |
3197 | ggc_strdup (gimple_asm_string (stmt)), | |
618400bc | 3198 | "", 0, argvec, constraintvec, |
7ca35180 RH |
3199 | labelvec, locus); |
3200 | MEM_VOLATILE_P (body) = gimple_asm_volatile_p (stmt); | |
3201 | ||
3202 | for (i = 0; i < ninputs; ++i) | |
3203 | { | |
3204 | ASM_OPERANDS_INPUT (body, i) = input_rvec[i]; | |
3205 | ASM_OPERANDS_INPUT_CONSTRAINT_EXP (body, i) | |
3206 | = gen_rtx_ASM_INPUT_loc (input_mode[i], | |
3207 | constraints[i + noutputs], | |
3208 | locus); | |
862d0b35 DN |
3209 | } |
3210 | ||
3211 | /* Copy labels to the vector. */ | |
7ca35180 RH |
3212 | rtx_code_label *fallthru_label = NULL; |
3213 | if (nlabels > 0) | |
3214 | { | |
3215 | basic_block fallthru_bb = NULL; | |
3216 | edge fallthru = find_fallthru_edge (gimple_bb (stmt)->succs); | |
3217 | if (fallthru) | |
3218 | fallthru_bb = fallthru->dest; | |
3219 | ||
3220 | for (i = 0; i < nlabels; ++i) | |
862d0b35 | 3221 | { |
7ca35180 | 3222 | tree label = TREE_VALUE (gimple_asm_label_op (stmt, i)); |
e67d1102 | 3223 | rtx_insn *r; |
7ca35180 RH |
3224 | /* If asm goto has any labels in the fallthru basic block, use |
3225 | a label that we emit immediately after the asm goto. Expansion | |
3226 | may insert further instructions into the same basic block after | |
3227 | asm goto and if we don't do this, insertion of instructions on | |
3228 | the fallthru edge might misbehave. See PR58670. */ | |
3229 | if (fallthru_bb && label_to_block_fn (cfun, label) == fallthru_bb) | |
3230 | { | |
3231 | if (fallthru_label == NULL_RTX) | |
3232 | fallthru_label = gen_label_rtx (); | |
3233 | r = fallthru_label; | |
3234 | } | |
3235 | else | |
3236 | r = label_rtx (label); | |
3237 | ASM_OPERANDS_LABEL (body, i) = gen_rtx_LABEL_REF (Pmode, r); | |
862d0b35 | 3238 | } |
862d0b35 DN |
3239 | } |
3240 | ||
862d0b35 DN |
3241 | /* Now, for each output, construct an rtx |
3242 | (set OUTPUT (asm_operands INSN OUTPUTCONSTRAINT OUTPUTNUMBER | |
3243 | ARGVEC CONSTRAINTS OPNAMES)) | |
3244 | If there is more than one, put them inside a PARALLEL. */ | |
3245 | ||
3246 | if (nlabels > 0 && nclobbers == 0) | |
3247 | { | |
3248 | gcc_assert (noutputs == 0); | |
3249 | emit_jump_insn (body); | |
3250 | } | |
3251 | else if (noutputs == 0 && nclobbers == 0) | |
3252 | { | |
3253 | /* No output operands: put in a raw ASM_OPERANDS rtx. */ | |
3254 | emit_insn (body); | |
3255 | } | |
3256 | else if (noutputs == 1 && nclobbers == 0) | |
3257 | { | |
7ca35180 RH |
3258 | ASM_OPERANDS_OUTPUT_CONSTRAINT (body) = constraints[0]; |
3259 | emit_insn (gen_rtx_SET (output_rvec[0], body)); | |
862d0b35 DN |
3260 | } |
3261 | else | |
3262 | { | |
3263 | rtx obody = body; | |
3264 | int num = noutputs; | |
3265 | ||
3266 | if (num == 0) | |
3267 | num = 1; | |
3268 | ||
3269 | body = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (num + nclobbers)); | |
3270 | ||
3271 | /* For each output operand, store a SET. */ | |
7ca35180 | 3272 | for (i = 0; i < noutputs; ++i) |
862d0b35 | 3273 | { |
7ca35180 RH |
3274 | rtx src, o = output_rvec[i]; |
3275 | if (i == 0) | |
3276 | { | |
3277 | ASM_OPERANDS_OUTPUT_CONSTRAINT (obody) = constraints[0]; | |
3278 | src = obody; | |
3279 | } | |
3280 | else | |
3281 | { | |
3282 | src = gen_rtx_ASM_OPERANDS (GET_MODE (o), | |
3283 | ASM_OPERANDS_TEMPLATE (obody), | |
3284 | constraints[i], i, argvec, | |
3285 | constraintvec, labelvec, locus); | |
3286 | MEM_VOLATILE_P (src) = gimple_asm_volatile_p (stmt); | |
3287 | } | |
3288 | XVECEXP (body, 0, i) = gen_rtx_SET (o, src); | |
862d0b35 DN |
3289 | } |
3290 | ||
3291 | /* If there are no outputs (but there are some clobbers) | |
3292 | store the bare ASM_OPERANDS into the PARALLEL. */ | |
862d0b35 DN |
3293 | if (i == 0) |
3294 | XVECEXP (body, 0, i++) = obody; | |
3295 | ||
3296 | /* Store (clobber REG) for each clobbered register specified. */ | |
7ca35180 | 3297 | for (unsigned j = 0; j < nclobbers; ++j) |
862d0b35 | 3298 | { |
7ca35180 | 3299 | rtx clobbered_reg = clobber_rvec[j]; |
862d0b35 | 3300 | |
7ca35180 RH |
3301 | /* Do sanity check for overlap between clobbers and respectively |
3302 | input and outputs that hasn't been handled. Such overlap | |
3303 | should have been detected and reported above. */ | |
3304 | if (!clobber_conflict_found && REG_P (clobbered_reg)) | |
862d0b35 | 3305 | { |
7ca35180 RH |
3306 | /* We test the old body (obody) contents to avoid |
3307 | tripping over the under-construction body. */ | |
3308 | for (unsigned k = 0; k < noutputs; ++k) | |
3309 | if (reg_overlap_mentioned_p (clobbered_reg, output_rvec[k])) | |
3310 | internal_error ("asm clobber conflict with output operand"); | |
3311 | ||
3312 | for (unsigned k = 0; k < ninputs - ninout; ++k) | |
3313 | if (reg_overlap_mentioned_p (clobbered_reg, input_rvec[k])) | |
3314 | internal_error ("asm clobber conflict with input operand"); | |
862d0b35 DN |
3315 | } |
3316 | ||
7ca35180 | 3317 | XVECEXP (body, 0, i++) = gen_rtx_CLOBBER (VOIDmode, clobbered_reg); |
862d0b35 DN |
3318 | } |
3319 | ||
3320 | if (nlabels > 0) | |
3321 | emit_jump_insn (body); | |
3322 | else | |
3323 | emit_insn (body); | |
3324 | } | |
3325 | ||
7ca35180 RH |
3326 | generating_concat_p = old_generating_concat_p; |
3327 | ||
862d0b35 DN |
3328 | if (fallthru_label) |
3329 | emit_label (fallthru_label); | |
3330 | ||
7ca35180 RH |
3331 | if (after_md_seq) |
3332 | emit_insn (after_md_seq); | |
3333 | if (after_rtl_seq) | |
3334 | emit_insn (after_rtl_seq); | |
862d0b35 | 3335 | |
6476a8fd | 3336 | free_temp_slots (); |
7ca35180 | 3337 | crtl->has_asm_statement = 1; |
862d0b35 DN |
3338 | } |
3339 | ||
3340 | /* Emit code to jump to the address | |
3341 | specified by the pointer expression EXP. */ | |
3342 | ||
3343 | static void | |
3344 | expand_computed_goto (tree exp) | |
3345 | { | |
3346 | rtx x = expand_normal (exp); | |
3347 | ||
862d0b35 DN |
3348 | do_pending_stack_adjust (); |
3349 | emit_indirect_jump (x); | |
3350 | } | |
3351 | ||
3352 | /* Generate RTL code for a `goto' statement with target label LABEL. | |
3353 | LABEL should be a LABEL_DECL tree node that was or will later be | |
3354 | defined with `expand_label'. */ | |
3355 | ||
3356 | static void | |
3357 | expand_goto (tree label) | |
3358 | { | |
b2b29377 MM |
3359 | if (flag_checking) |
3360 | { | |
3361 | /* Check for a nonlocal goto to a containing function. Should have | |
3362 | gotten translated to __builtin_nonlocal_goto. */ | |
3363 | tree context = decl_function_context (label); | |
3364 | gcc_assert (!context || context == current_function_decl); | |
3365 | } | |
862d0b35 | 3366 | |
1476d1bd | 3367 | emit_jump (jump_target_rtx (label)); |
862d0b35 DN |
3368 | } |
3369 | ||
3370 | /* Output a return with no value. */ | |
3371 | ||
3372 | static void | |
3373 | expand_null_return_1 (void) | |
3374 | { | |
3375 | clear_pending_stack_adjust (); | |
3376 | do_pending_stack_adjust (); | |
3377 | emit_jump (return_label); | |
3378 | } | |
3379 | ||
3380 | /* Generate RTL to return from the current function, with no value. | |
3381 | (That is, we do not do anything about returning any value.) */ | |
3382 | ||
3383 | void | |
3384 | expand_null_return (void) | |
3385 | { | |
3386 | /* If this function was declared to return a value, but we | |
3387 | didn't, clobber the return registers so that they are not | |
3388 | propagated live to the rest of the function. */ | |
3389 | clobber_return_register (); | |
3390 | ||
3391 | expand_null_return_1 (); | |
3392 | } | |
3393 | ||
3394 | /* Generate RTL to return from the current function, with value VAL. */ | |
3395 | ||
3396 | static void | |
3397 | expand_value_return (rtx val) | |
3398 | { | |
3399 | /* Copy the value to the return location unless it's already there. */ | |
3400 | ||
3401 | tree decl = DECL_RESULT (current_function_decl); | |
3402 | rtx return_reg = DECL_RTL (decl); | |
3403 | if (return_reg != val) | |
3404 | { | |
3405 | tree funtype = TREE_TYPE (current_function_decl); | |
3406 | tree type = TREE_TYPE (decl); | |
3407 | int unsignedp = TYPE_UNSIGNED (type); | |
ef4bddc2 RS |
3408 | machine_mode old_mode = DECL_MODE (decl); |
3409 | machine_mode mode; | |
862d0b35 DN |
3410 | if (DECL_BY_REFERENCE (decl)) |
3411 | mode = promote_function_mode (type, old_mode, &unsignedp, funtype, 2); | |
3412 | else | |
3413 | mode = promote_function_mode (type, old_mode, &unsignedp, funtype, 1); | |
3414 | ||
3415 | if (mode != old_mode) | |
3416 | val = convert_modes (mode, old_mode, val, unsignedp); | |
3417 | ||
3418 | if (GET_CODE (return_reg) == PARALLEL) | |
3419 | emit_group_load (return_reg, val, type, int_size_in_bytes (type)); | |
3420 | else | |
3421 | emit_move_insn (return_reg, val); | |
3422 | } | |
3423 | ||
3424 | expand_null_return_1 (); | |
3425 | } | |
3426 | ||
3427 | /* Generate RTL to evaluate the expression RETVAL and return it | |
3428 | from the current function. */ | |
3429 | ||
3430 | static void | |
d5e254e1 | 3431 | expand_return (tree retval, tree bounds) |
862d0b35 DN |
3432 | { |
3433 | rtx result_rtl; | |
3434 | rtx val = 0; | |
3435 | tree retval_rhs; | |
d5e254e1 | 3436 | rtx bounds_rtl; |
862d0b35 DN |
3437 | |
3438 | /* If function wants no value, give it none. */ | |
3439 | if (TREE_CODE (TREE_TYPE (TREE_TYPE (current_function_decl))) == VOID_TYPE) | |
3440 | { | |
3441 | expand_normal (retval); | |
3442 | expand_null_return (); | |
3443 | return; | |
3444 | } | |
3445 | ||
3446 | if (retval == error_mark_node) | |
3447 | { | |
3448 | /* Treat this like a return of no value from a function that | |
3449 | returns a value. */ | |
3450 | expand_null_return (); | |
3451 | return; | |
3452 | } | |
3453 | else if ((TREE_CODE (retval) == MODIFY_EXPR | |
3454 | || TREE_CODE (retval) == INIT_EXPR) | |
3455 | && TREE_CODE (TREE_OPERAND (retval, 0)) == RESULT_DECL) | |
3456 | retval_rhs = TREE_OPERAND (retval, 1); | |
3457 | else | |
3458 | retval_rhs = retval; | |
3459 | ||
3460 | result_rtl = DECL_RTL (DECL_RESULT (current_function_decl)); | |
3461 | ||
d5e254e1 IE |
3462 | /* Put returned bounds to the right place. */ |
3463 | bounds_rtl = DECL_BOUNDS_RTL (DECL_RESULT (current_function_decl)); | |
3464 | if (bounds_rtl) | |
3465 | { | |
855f036d IE |
3466 | rtx addr = NULL; |
3467 | rtx bnd = NULL; | |
d5e254e1 | 3468 | |
855f036d | 3469 | if (bounds && bounds != error_mark_node) |
d5e254e1 IE |
3470 | { |
3471 | bnd = expand_normal (bounds); | |
3472 | targetm.calls.store_returned_bounds (bounds_rtl, bnd); | |
3473 | } | |
3474 | else if (REG_P (bounds_rtl)) | |
3475 | { | |
855f036d IE |
3476 | if (bounds) |
3477 | bnd = chkp_expand_zero_bounds (); | |
3478 | else | |
3479 | { | |
3480 | addr = expand_normal (build_fold_addr_expr (retval_rhs)); | |
3481 | addr = gen_rtx_MEM (Pmode, addr); | |
3482 | bnd = targetm.calls.load_bounds_for_arg (addr, NULL, NULL); | |
3483 | } | |
3484 | ||
d5e254e1 IE |
3485 | targetm.calls.store_returned_bounds (bounds_rtl, bnd); |
3486 | } | |
3487 | else | |
3488 | { | |
3489 | int n; | |
3490 | ||
3491 | gcc_assert (GET_CODE (bounds_rtl) == PARALLEL); | |
3492 | ||
855f036d IE |
3493 | if (bounds) |
3494 | bnd = chkp_expand_zero_bounds (); | |
3495 | else | |
3496 | { | |
3497 | addr = expand_normal (build_fold_addr_expr (retval_rhs)); | |
3498 | addr = gen_rtx_MEM (Pmode, addr); | |
3499 | } | |
d5e254e1 IE |
3500 | |
3501 | for (n = 0; n < XVECLEN (bounds_rtl, 0); n++) | |
3502 | { | |
d5e254e1 | 3503 | rtx slot = XEXP (XVECEXP (bounds_rtl, 0, n), 0); |
855f036d IE |
3504 | if (!bounds) |
3505 | { | |
3506 | rtx offs = XEXP (XVECEXP (bounds_rtl, 0, n), 1); | |
3507 | rtx from = adjust_address (addr, Pmode, INTVAL (offs)); | |
3508 | bnd = targetm.calls.load_bounds_for_arg (from, NULL, NULL); | |
3509 | } | |
d5e254e1 IE |
3510 | targetm.calls.store_returned_bounds (slot, bnd); |
3511 | } | |
3512 | } | |
3513 | } | |
3514 | else if (chkp_function_instrumented_p (current_function_decl) | |
3515 | && !BOUNDED_P (retval_rhs) | |
3516 | && chkp_type_has_pointer (TREE_TYPE (retval_rhs)) | |
3517 | && TREE_CODE (retval_rhs) != RESULT_DECL) | |
3518 | { | |
3519 | rtx addr = expand_normal (build_fold_addr_expr (retval_rhs)); | |
3520 | addr = gen_rtx_MEM (Pmode, addr); | |
3521 | ||
3522 | gcc_assert (MEM_P (result_rtl)); | |
3523 | ||
3524 | chkp_copy_bounds_for_stack_parm (result_rtl, addr, TREE_TYPE (retval_rhs)); | |
3525 | } | |
3526 | ||
862d0b35 DN |
3527 | /* If we are returning the RESULT_DECL, then the value has already |
3528 | been stored into it, so we don't have to do anything special. */ | |
3529 | if (TREE_CODE (retval_rhs) == RESULT_DECL) | |
3530 | expand_value_return (result_rtl); | |
3531 | ||
3532 | /* If the result is an aggregate that is being returned in one (or more) | |
3533 | registers, load the registers here. */ | |
3534 | ||
3535 | else if (retval_rhs != 0 | |
3536 | && TYPE_MODE (TREE_TYPE (retval_rhs)) == BLKmode | |
3537 | && REG_P (result_rtl)) | |
3538 | { | |
3539 | val = copy_blkmode_to_reg (GET_MODE (result_rtl), retval_rhs); | |
3540 | if (val) | |
3541 | { | |
3542 | /* Use the mode of the result value on the return register. */ | |
3543 | PUT_MODE (result_rtl, GET_MODE (val)); | |
3544 | expand_value_return (val); | |
3545 | } | |
3546 | else | |
3547 | expand_null_return (); | |
3548 | } | |
3549 | else if (retval_rhs != 0 | |
3550 | && !VOID_TYPE_P (TREE_TYPE (retval_rhs)) | |
3551 | && (REG_P (result_rtl) | |
3552 | || (GET_CODE (result_rtl) == PARALLEL))) | |
3553 | { | |
9ee5337d EB |
3554 | /* Compute the return value into a temporary (usually a pseudo reg). */ |
3555 | val | |
3556 | = assign_temp (TREE_TYPE (DECL_RESULT (current_function_decl)), 0, 1); | |
862d0b35 DN |
3557 | val = expand_expr (retval_rhs, val, GET_MODE (val), EXPAND_NORMAL); |
3558 | val = force_not_mem (val); | |
862d0b35 DN |
3559 | expand_value_return (val); |
3560 | } | |
3561 | else | |
3562 | { | |
3563 | /* No hard reg used; calculate value into hard return reg. */ | |
3564 | expand_expr (retval, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3565 | expand_value_return (result_rtl); | |
3566 | } | |
3567 | } | |
3568 | ||
28ed065e MM |
3569 | /* A subroutine of expand_gimple_stmt, expanding one gimple statement |
3570 | STMT that doesn't require special handling for outgoing edges. That | |
3571 | is no tailcalls and no GIMPLE_COND. */ | |
3572 | ||
3573 | static void | |
355fe088 | 3574 | expand_gimple_stmt_1 (gimple *stmt) |
28ed065e MM |
3575 | { |
3576 | tree op0; | |
c82fee88 | 3577 | |
5368224f | 3578 | set_curr_insn_location (gimple_location (stmt)); |
c82fee88 | 3579 | |
28ed065e MM |
3580 | switch (gimple_code (stmt)) |
3581 | { | |
3582 | case GIMPLE_GOTO: | |
3583 | op0 = gimple_goto_dest (stmt); | |
3584 | if (TREE_CODE (op0) == LABEL_DECL) | |
3585 | expand_goto (op0); | |
3586 | else | |
3587 | expand_computed_goto (op0); | |
3588 | break; | |
3589 | case GIMPLE_LABEL: | |
538dd0b7 | 3590 | expand_label (gimple_label_label (as_a <glabel *> (stmt))); |
28ed065e MM |
3591 | break; |
3592 | case GIMPLE_NOP: | |
3593 | case GIMPLE_PREDICT: | |
3594 | break; | |
28ed065e | 3595 | case GIMPLE_SWITCH: |
f66459c1 PB |
3596 | { |
3597 | gswitch *swtch = as_a <gswitch *> (stmt); | |
3598 | if (gimple_switch_num_labels (swtch) == 1) | |
3599 | expand_goto (CASE_LABEL (gimple_switch_default_label (swtch))); | |
3600 | else | |
3601 | expand_case (swtch); | |
3602 | } | |
28ed065e MM |
3603 | break; |
3604 | case GIMPLE_ASM: | |
538dd0b7 | 3605 | expand_asm_stmt (as_a <gasm *> (stmt)); |
28ed065e MM |
3606 | break; |
3607 | case GIMPLE_CALL: | |
538dd0b7 | 3608 | expand_call_stmt (as_a <gcall *> (stmt)); |
28ed065e MM |
3609 | break; |
3610 | ||
3611 | case GIMPLE_RETURN: | |
855f036d IE |
3612 | { |
3613 | tree bnd = gimple_return_retbnd (as_a <greturn *> (stmt)); | |
3614 | op0 = gimple_return_retval (as_a <greturn *> (stmt)); | |
28ed065e | 3615 | |
855f036d IE |
3616 | if (op0 && op0 != error_mark_node) |
3617 | { | |
3618 | tree result = DECL_RESULT (current_function_decl); | |
28ed065e | 3619 | |
b5be36b1 IE |
3620 | /* Mark we have return statement with missing bounds. */ |
3621 | if (!bnd | |
3622 | && chkp_function_instrumented_p (cfun->decl) | |
3623 | && !DECL_P (op0)) | |
3624 | bnd = error_mark_node; | |
3625 | ||
855f036d IE |
3626 | /* If we are not returning the current function's RESULT_DECL, |
3627 | build an assignment to it. */ | |
3628 | if (op0 != result) | |
3629 | { | |
3630 | /* I believe that a function's RESULT_DECL is unique. */ | |
3631 | gcc_assert (TREE_CODE (op0) != RESULT_DECL); | |
3632 | ||
3633 | /* ??? We'd like to use simply expand_assignment here, | |
3634 | but this fails if the value is of BLKmode but the return | |
3635 | decl is a register. expand_return has special handling | |
3636 | for this combination, which eventually should move | |
3637 | to common code. See comments there. Until then, let's | |
3638 | build a modify expression :-/ */ | |
3639 | op0 = build2 (MODIFY_EXPR, TREE_TYPE (result), | |
3640 | result, op0); | |
3641 | } | |
855f036d IE |
3642 | } |
3643 | ||
3644 | if (!op0) | |
3645 | expand_null_return (); | |
3646 | else | |
3647 | expand_return (op0, bnd); | |
3648 | } | |
28ed065e MM |
3649 | break; |
3650 | ||
3651 | case GIMPLE_ASSIGN: | |
3652 | { | |
538dd0b7 DM |
3653 | gassign *assign_stmt = as_a <gassign *> (stmt); |
3654 | tree lhs = gimple_assign_lhs (assign_stmt); | |
28ed065e MM |
3655 | |
3656 | /* Tree expand used to fiddle with |= and &= of two bitfield | |
3657 | COMPONENT_REFs here. This can't happen with gimple, the LHS | |
3658 | of binary assigns must be a gimple reg. */ | |
3659 | ||
3660 | if (TREE_CODE (lhs) != SSA_NAME | |
3661 | || get_gimple_rhs_class (gimple_expr_code (stmt)) | |
3662 | == GIMPLE_SINGLE_RHS) | |
3663 | { | |
538dd0b7 | 3664 | tree rhs = gimple_assign_rhs1 (assign_stmt); |
28ed065e MM |
3665 | gcc_assert (get_gimple_rhs_class (gimple_expr_code (stmt)) |
3666 | == GIMPLE_SINGLE_RHS); | |
ae2ffe2a RB |
3667 | if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (rhs) |
3668 | /* Do not put locations on possibly shared trees. */ | |
3669 | && !is_gimple_min_invariant (rhs)) | |
28ed065e | 3670 | SET_EXPR_LOCATION (rhs, gimple_location (stmt)); |
47598145 MM |
3671 | if (TREE_CLOBBER_P (rhs)) |
3672 | /* This is a clobber to mark the going out of scope for | |
3673 | this LHS. */ | |
3674 | ; | |
3675 | else | |
3676 | expand_assignment (lhs, rhs, | |
538dd0b7 DM |
3677 | gimple_assign_nontemporal_move_p ( |
3678 | assign_stmt)); | |
28ed065e MM |
3679 | } |
3680 | else | |
3681 | { | |
3682 | rtx target, temp; | |
538dd0b7 | 3683 | bool nontemporal = gimple_assign_nontemporal_move_p (assign_stmt); |
28ed065e MM |
3684 | struct separate_ops ops; |
3685 | bool promoted = false; | |
3686 | ||
3687 | target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
3688 | if (GET_CODE (target) == SUBREG && SUBREG_PROMOTED_VAR_P (target)) | |
3689 | promoted = true; | |
3690 | ||
538dd0b7 | 3691 | ops.code = gimple_assign_rhs_code (assign_stmt); |
28ed065e | 3692 | ops.type = TREE_TYPE (lhs); |
b0dd8c90 | 3693 | switch (get_gimple_rhs_class (ops.code)) |
28ed065e | 3694 | { |
0354c0c7 | 3695 | case GIMPLE_TERNARY_RHS: |
538dd0b7 | 3696 | ops.op2 = gimple_assign_rhs3 (assign_stmt); |
0354c0c7 | 3697 | /* Fallthru */ |
28ed065e | 3698 | case GIMPLE_BINARY_RHS: |
538dd0b7 | 3699 | ops.op1 = gimple_assign_rhs2 (assign_stmt); |
28ed065e MM |
3700 | /* Fallthru */ |
3701 | case GIMPLE_UNARY_RHS: | |
538dd0b7 | 3702 | ops.op0 = gimple_assign_rhs1 (assign_stmt); |
28ed065e MM |
3703 | break; |
3704 | default: | |
3705 | gcc_unreachable (); | |
3706 | } | |
3707 | ops.location = gimple_location (stmt); | |
3708 | ||
3709 | /* If we want to use a nontemporal store, force the value to | |
3710 | register first. If we store into a promoted register, | |
3711 | don't directly expand to target. */ | |
3712 | temp = nontemporal || promoted ? NULL_RTX : target; | |
3713 | temp = expand_expr_real_2 (&ops, temp, GET_MODE (target), | |
3714 | EXPAND_NORMAL); | |
3715 | ||
3716 | if (temp == target) | |
3717 | ; | |
3718 | else if (promoted) | |
3719 | { | |
362d42dc | 3720 | int unsignedp = SUBREG_PROMOTED_SIGN (target); |
28ed065e MM |
3721 | /* If TEMP is a VOIDmode constant, use convert_modes to make |
3722 | sure that we properly convert it. */ | |
3723 | if (CONSTANT_P (temp) && GET_MODE (temp) == VOIDmode) | |
3724 | { | |
3725 | temp = convert_modes (GET_MODE (target), | |
3726 | TYPE_MODE (ops.type), | |
4e18a7d4 | 3727 | temp, unsignedp); |
28ed065e | 3728 | temp = convert_modes (GET_MODE (SUBREG_REG (target)), |
4e18a7d4 | 3729 | GET_MODE (target), temp, unsignedp); |
28ed065e MM |
3730 | } |
3731 | ||
27be0c32 | 3732 | convert_move (SUBREG_REG (target), temp, unsignedp); |
28ed065e MM |
3733 | } |
3734 | else if (nontemporal && emit_storent_insn (target, temp)) | |
3735 | ; | |
3736 | else | |
3737 | { | |
3738 | temp = force_operand (temp, target); | |
3739 | if (temp != target) | |
3740 | emit_move_insn (target, temp); | |
3741 | } | |
3742 | } | |
3743 | } | |
3744 | break; | |
3745 | ||
3746 | default: | |
3747 | gcc_unreachable (); | |
3748 | } | |
3749 | } | |
3750 | ||
3751 | /* Expand one gimple statement STMT and return the last RTL instruction | |
3752 | before any of the newly generated ones. | |
3753 | ||
3754 | In addition to generating the necessary RTL instructions this also | |
3755 | sets REG_EH_REGION notes if necessary and sets the current source | |
3756 | location for diagnostics. */ | |
3757 | ||
b47aae36 | 3758 | static rtx_insn * |
355fe088 | 3759 | expand_gimple_stmt (gimple *stmt) |
28ed065e | 3760 | { |
28ed065e | 3761 | location_t saved_location = input_location; |
b47aae36 | 3762 | rtx_insn *last = get_last_insn (); |
c82fee88 | 3763 | int lp_nr; |
28ed065e | 3764 | |
28ed065e MM |
3765 | gcc_assert (cfun); |
3766 | ||
c82fee88 EB |
3767 | /* We need to save and restore the current source location so that errors |
3768 | discovered during expansion are emitted with the right location. But | |
3769 | it would be better if the diagnostic routines used the source location | |
3770 | embedded in the tree nodes rather than globals. */ | |
28ed065e | 3771 | if (gimple_has_location (stmt)) |
c82fee88 | 3772 | input_location = gimple_location (stmt); |
28ed065e MM |
3773 | |
3774 | expand_gimple_stmt_1 (stmt); | |
c82fee88 | 3775 | |
28ed065e MM |
3776 | /* Free any temporaries used to evaluate this statement. */ |
3777 | free_temp_slots (); | |
3778 | ||
3779 | input_location = saved_location; | |
3780 | ||
3781 | /* Mark all insns that may trap. */ | |
1d65f45c RH |
3782 | lp_nr = lookup_stmt_eh_lp (stmt); |
3783 | if (lp_nr) | |
28ed065e | 3784 | { |
b47aae36 | 3785 | rtx_insn *insn; |
28ed065e MM |
3786 | for (insn = next_real_insn (last); insn; |
3787 | insn = next_real_insn (insn)) | |
3788 | { | |
3789 | if (! find_reg_note (insn, REG_EH_REGION, NULL_RTX) | |
3790 | /* If we want exceptions for non-call insns, any | |
3791 | may_trap_p instruction may throw. */ | |
3792 | && GET_CODE (PATTERN (insn)) != CLOBBER | |
3793 | && GET_CODE (PATTERN (insn)) != USE | |
1d65f45c RH |
3794 | && insn_could_throw_p (insn)) |
3795 | make_reg_eh_region_note (insn, 0, lp_nr); | |
28ed065e MM |
3796 | } |
3797 | } | |
3798 | ||
3799 | return last; | |
3800 | } | |
3801 | ||
726a989a | 3802 | /* A subroutine of expand_gimple_basic_block. Expand one GIMPLE_CALL |
224e770b RH |
3803 | that has CALL_EXPR_TAILCALL set. Returns non-null if we actually |
3804 | generated a tail call (something that might be denied by the ABI | |
cea49550 RH |
3805 | rules governing the call; see calls.c). |
3806 | ||
3807 | Sets CAN_FALLTHRU if we generated a *conditional* tail call, and | |
3808 | can still reach the rest of BB. The case here is __builtin_sqrt, | |
3809 | where the NaN result goes through the external function (with a | |
3810 | tailcall) and the normal result happens via a sqrt instruction. */ | |
80c7a9eb RH |
3811 | |
3812 | static basic_block | |
538dd0b7 | 3813 | expand_gimple_tailcall (basic_block bb, gcall *stmt, bool *can_fallthru) |
80c7a9eb | 3814 | { |
b47aae36 | 3815 | rtx_insn *last2, *last; |
224e770b | 3816 | edge e; |
628f6a4e | 3817 | edge_iterator ei; |
357067f2 | 3818 | profile_probability probability; |
80c7a9eb | 3819 | |
28ed065e | 3820 | last2 = last = expand_gimple_stmt (stmt); |
80c7a9eb RH |
3821 | |
3822 | for (last = NEXT_INSN (last); last; last = NEXT_INSN (last)) | |
224e770b RH |
3823 | if (CALL_P (last) && SIBLING_CALL_P (last)) |
3824 | goto found; | |
80c7a9eb | 3825 | |
726a989a | 3826 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
b7211528 | 3827 | |
cea49550 | 3828 | *can_fallthru = true; |
224e770b | 3829 | return NULL; |
80c7a9eb | 3830 | |
224e770b RH |
3831 | found: |
3832 | /* ??? Wouldn't it be better to just reset any pending stack adjust? | |
3833 | Any instructions emitted here are about to be deleted. */ | |
3834 | do_pending_stack_adjust (); | |
3835 | ||
3836 | /* Remove any non-eh, non-abnormal edges that don't go to exit. */ | |
3837 | /* ??? I.e. the fallthrough edge. HOWEVER! If there were to be | |
3838 | EH or abnormal edges, we shouldn't have created a tail call in | |
3839 | the first place. So it seems to me we should just be removing | |
3840 | all edges here, or redirecting the existing fallthru edge to | |
3841 | the exit block. */ | |
3842 | ||
357067f2 | 3843 | probability = profile_probability::never (); |
224e770b | 3844 | |
628f6a4e BE |
3845 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) |
3846 | { | |
224e770b RH |
3847 | if (!(e->flags & (EDGE_ABNORMAL | EDGE_EH))) |
3848 | { | |
fefa31b5 | 3849 | if (e->dest != EXIT_BLOCK_PTR_FOR_FN (cfun)) |
80c7a9eb | 3850 | { |
224e770b | 3851 | e->dest->frequency -= EDGE_FREQUENCY (e); |
224e770b | 3852 | if (e->dest->frequency < 0) |
c22cacf3 | 3853 | e->dest->frequency = 0; |
80c7a9eb | 3854 | } |
224e770b RH |
3855 | probability += e->probability; |
3856 | remove_edge (e); | |
80c7a9eb | 3857 | } |
628f6a4e BE |
3858 | else |
3859 | ei_next (&ei); | |
80c7a9eb RH |
3860 | } |
3861 | ||
224e770b RH |
3862 | /* This is somewhat ugly: the call_expr expander often emits instructions |
3863 | after the sibcall (to perform the function return). These confuse the | |
12eff7b7 | 3864 | find_many_sub_basic_blocks code, so we need to get rid of these. */ |
224e770b | 3865 | last = NEXT_INSN (last); |
341c100f | 3866 | gcc_assert (BARRIER_P (last)); |
cea49550 RH |
3867 | |
3868 | *can_fallthru = false; | |
224e770b RH |
3869 | while (NEXT_INSN (last)) |
3870 | { | |
3871 | /* For instance an sqrt builtin expander expands if with | |
3872 | sibcall in the then and label for `else`. */ | |
3873 | if (LABEL_P (NEXT_INSN (last))) | |
cea49550 RH |
3874 | { |
3875 | *can_fallthru = true; | |
3876 | break; | |
3877 | } | |
224e770b RH |
3878 | delete_insn (NEXT_INSN (last)); |
3879 | } | |
3880 | ||
fefa31b5 DM |
3881 | e = make_edge (bb, EXIT_BLOCK_PTR_FOR_FN (cfun), EDGE_ABNORMAL |
3882 | | EDGE_SIBCALL); | |
aea5e79a | 3883 | e->probability = probability; |
1130d5e3 | 3884 | BB_END (bb) = last; |
224e770b RH |
3885 | update_bb_for_insn (bb); |
3886 | ||
3887 | if (NEXT_INSN (last)) | |
3888 | { | |
3889 | bb = create_basic_block (NEXT_INSN (last), get_last_insn (), bb); | |
3890 | ||
3891 | last = BB_END (bb); | |
3892 | if (BARRIER_P (last)) | |
1130d5e3 | 3893 | BB_END (bb) = PREV_INSN (last); |
224e770b RH |
3894 | } |
3895 | ||
726a989a | 3896 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
b7211528 | 3897 | |
224e770b | 3898 | return bb; |
80c7a9eb RH |
3899 | } |
3900 | ||
b5b8b0ac AO |
3901 | /* Return the difference between the floor and the truncated result of |
3902 | a signed division by OP1 with remainder MOD. */ | |
3903 | static rtx | |
ef4bddc2 | 3904 | floor_sdiv_adjust (machine_mode mode, rtx mod, rtx op1) |
b5b8b0ac AO |
3905 | { |
3906 | /* (mod != 0 ? (op1 / mod < 0 ? -1 : 0) : 0) */ | |
3907 | return gen_rtx_IF_THEN_ELSE | |
3908 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3909 | gen_rtx_IF_THEN_ELSE | |
3910 | (mode, gen_rtx_LT (BImode, | |
3911 | gen_rtx_DIV (mode, op1, mod), | |
3912 | const0_rtx), | |
3913 | constm1_rtx, const0_rtx), | |
3914 | const0_rtx); | |
3915 | } | |
3916 | ||
3917 | /* Return the difference between the ceil and the truncated result of | |
3918 | a signed division by OP1 with remainder MOD. */ | |
3919 | static rtx | |
ef4bddc2 | 3920 | ceil_sdiv_adjust (machine_mode mode, rtx mod, rtx op1) |
b5b8b0ac AO |
3921 | { |
3922 | /* (mod != 0 ? (op1 / mod > 0 ? 1 : 0) : 0) */ | |
3923 | return gen_rtx_IF_THEN_ELSE | |
3924 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3925 | gen_rtx_IF_THEN_ELSE | |
3926 | (mode, gen_rtx_GT (BImode, | |
3927 | gen_rtx_DIV (mode, op1, mod), | |
3928 | const0_rtx), | |
3929 | const1_rtx, const0_rtx), | |
3930 | const0_rtx); | |
3931 | } | |
3932 | ||
3933 | /* Return the difference between the ceil and the truncated result of | |
3934 | an unsigned division by OP1 with remainder MOD. */ | |
3935 | static rtx | |
ef4bddc2 | 3936 | ceil_udiv_adjust (machine_mode mode, rtx mod, rtx op1 ATTRIBUTE_UNUSED) |
b5b8b0ac AO |
3937 | { |
3938 | /* (mod != 0 ? 1 : 0) */ | |
3939 | return gen_rtx_IF_THEN_ELSE | |
3940 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3941 | const1_rtx, const0_rtx); | |
3942 | } | |
3943 | ||
3944 | /* Return the difference between the rounded and the truncated result | |
3945 | of a signed division by OP1 with remainder MOD. Halfway cases are | |
3946 | rounded away from zero, rather than to the nearest even number. */ | |
3947 | static rtx | |
ef4bddc2 | 3948 | round_sdiv_adjust (machine_mode mode, rtx mod, rtx op1) |
b5b8b0ac AO |
3949 | { |
3950 | /* (abs (mod) >= abs (op1) - abs (mod) | |
3951 | ? (op1 / mod > 0 ? 1 : -1) | |
3952 | : 0) */ | |
3953 | return gen_rtx_IF_THEN_ELSE | |
3954 | (mode, gen_rtx_GE (BImode, gen_rtx_ABS (mode, mod), | |
3955 | gen_rtx_MINUS (mode, | |
3956 | gen_rtx_ABS (mode, op1), | |
3957 | gen_rtx_ABS (mode, mod))), | |
3958 | gen_rtx_IF_THEN_ELSE | |
3959 | (mode, gen_rtx_GT (BImode, | |
3960 | gen_rtx_DIV (mode, op1, mod), | |
3961 | const0_rtx), | |
3962 | const1_rtx, constm1_rtx), | |
3963 | const0_rtx); | |
3964 | } | |
3965 | ||
3966 | /* Return the difference between the rounded and the truncated result | |
3967 | of a unsigned division by OP1 with remainder MOD. Halfway cases | |
3968 | are rounded away from zero, rather than to the nearest even | |
3969 | number. */ | |
3970 | static rtx | |
ef4bddc2 | 3971 | round_udiv_adjust (machine_mode mode, rtx mod, rtx op1) |
b5b8b0ac AO |
3972 | { |
3973 | /* (mod >= op1 - mod ? 1 : 0) */ | |
3974 | return gen_rtx_IF_THEN_ELSE | |
3975 | (mode, gen_rtx_GE (BImode, mod, | |
3976 | gen_rtx_MINUS (mode, op1, mod)), | |
3977 | const1_rtx, const0_rtx); | |
3978 | } | |
3979 | ||
dda2da58 AO |
3980 | /* Convert X to MODE, that must be Pmode or ptr_mode, without emitting |
3981 | any rtl. */ | |
3982 | ||
3983 | static rtx | |
095a2d76 | 3984 | convert_debug_memory_address (scalar_int_mode mode, rtx x, |
f61c6f34 | 3985 | addr_space_t as) |
dda2da58 | 3986 | { |
dda2da58 | 3987 | #ifndef POINTERS_EXTEND_UNSIGNED |
f61c6f34 JJ |
3988 | gcc_assert (mode == Pmode |
3989 | || mode == targetm.addr_space.address_mode (as)); | |
c7ad039d | 3990 | gcc_assert (GET_MODE (x) == mode || GET_MODE (x) == VOIDmode); |
dda2da58 | 3991 | #else |
f61c6f34 | 3992 | rtx temp; |
f61c6f34 | 3993 | |
639d4bb8 | 3994 | gcc_assert (targetm.addr_space.valid_pointer_mode (mode, as)); |
dda2da58 AO |
3995 | |
3996 | if (GET_MODE (x) == mode || GET_MODE (x) == VOIDmode) | |
3997 | return x; | |
3998 | ||
c7ad039d RS |
3999 | /* X must have some form of address mode already. */ |
4000 | scalar_int_mode xmode = as_a <scalar_int_mode> (GET_MODE (x)); | |
69660a70 | 4001 | if (GET_MODE_PRECISION (mode) < GET_MODE_PRECISION (xmode)) |
3403a1a9 | 4002 | x = lowpart_subreg (mode, x, xmode); |
dda2da58 AO |
4003 | else if (POINTERS_EXTEND_UNSIGNED > 0) |
4004 | x = gen_rtx_ZERO_EXTEND (mode, x); | |
4005 | else if (!POINTERS_EXTEND_UNSIGNED) | |
4006 | x = gen_rtx_SIGN_EXTEND (mode, x); | |
4007 | else | |
f61c6f34 JJ |
4008 | { |
4009 | switch (GET_CODE (x)) | |
4010 | { | |
4011 | case SUBREG: | |
4012 | if ((SUBREG_PROMOTED_VAR_P (x) | |
4013 | || (REG_P (SUBREG_REG (x)) && REG_POINTER (SUBREG_REG (x))) | |
4014 | || (GET_CODE (SUBREG_REG (x)) == PLUS | |
4015 | && REG_P (XEXP (SUBREG_REG (x), 0)) | |
4016 | && REG_POINTER (XEXP (SUBREG_REG (x), 0)) | |
4017 | && CONST_INT_P (XEXP (SUBREG_REG (x), 1)))) | |
4018 | && GET_MODE (SUBREG_REG (x)) == mode) | |
4019 | return SUBREG_REG (x); | |
4020 | break; | |
4021 | case LABEL_REF: | |
04a121a7 | 4022 | temp = gen_rtx_LABEL_REF (mode, label_ref_label (x)); |
f61c6f34 JJ |
4023 | LABEL_REF_NONLOCAL_P (temp) = LABEL_REF_NONLOCAL_P (x); |
4024 | return temp; | |
4025 | case SYMBOL_REF: | |
4026 | temp = shallow_copy_rtx (x); | |
4027 | PUT_MODE (temp, mode); | |
4028 | return temp; | |
4029 | case CONST: | |
4030 | temp = convert_debug_memory_address (mode, XEXP (x, 0), as); | |
4031 | if (temp) | |
4032 | temp = gen_rtx_CONST (mode, temp); | |
4033 | return temp; | |
4034 | case PLUS: | |
4035 | case MINUS: | |
4036 | if (CONST_INT_P (XEXP (x, 1))) | |
4037 | { | |
4038 | temp = convert_debug_memory_address (mode, XEXP (x, 0), as); | |
4039 | if (temp) | |
4040 | return gen_rtx_fmt_ee (GET_CODE (x), mode, temp, XEXP (x, 1)); | |
4041 | } | |
4042 | break; | |
4043 | default: | |
4044 | break; | |
4045 | } | |
4046 | /* Don't know how to express ptr_extend as operation in debug info. */ | |
4047 | return NULL; | |
4048 | } | |
dda2da58 AO |
4049 | #endif /* POINTERS_EXTEND_UNSIGNED */ |
4050 | ||
4051 | return x; | |
4052 | } | |
4053 | ||
dfde35b3 JJ |
4054 | /* Map from SSA_NAMEs to corresponding DEBUG_EXPR_DECLs created |
4055 | by avoid_deep_ter_for_debug. */ | |
4056 | ||
4057 | static hash_map<tree, tree> *deep_ter_debug_map; | |
4058 | ||
4059 | /* Split too deep TER chains for debug stmts using debug temporaries. */ | |
4060 | ||
4061 | static void | |
355fe088 | 4062 | avoid_deep_ter_for_debug (gimple *stmt, int depth) |
dfde35b3 JJ |
4063 | { |
4064 | use_operand_p use_p; | |
4065 | ssa_op_iter iter; | |
4066 | FOR_EACH_SSA_USE_OPERAND (use_p, stmt, iter, SSA_OP_USE) | |
4067 | { | |
4068 | tree use = USE_FROM_PTR (use_p); | |
4069 | if (TREE_CODE (use) != SSA_NAME || SSA_NAME_IS_DEFAULT_DEF (use)) | |
4070 | continue; | |
355fe088 | 4071 | gimple *g = get_gimple_for_ssa_name (use); |
dfde35b3 JJ |
4072 | if (g == NULL) |
4073 | continue; | |
4074 | if (depth > 6 && !stmt_ends_bb_p (g)) | |
4075 | { | |
4076 | if (deep_ter_debug_map == NULL) | |
4077 | deep_ter_debug_map = new hash_map<tree, tree>; | |
4078 | ||
4079 | tree &vexpr = deep_ter_debug_map->get_or_insert (use); | |
4080 | if (vexpr != NULL) | |
4081 | continue; | |
4082 | vexpr = make_node (DEBUG_EXPR_DECL); | |
355fe088 | 4083 | gimple *def_temp = gimple_build_debug_bind (vexpr, use, g); |
dfde35b3 JJ |
4084 | DECL_ARTIFICIAL (vexpr) = 1; |
4085 | TREE_TYPE (vexpr) = TREE_TYPE (use); | |
899ca90e | 4086 | SET_DECL_MODE (vexpr, TYPE_MODE (TREE_TYPE (use))); |
dfde35b3 JJ |
4087 | gimple_stmt_iterator gsi = gsi_for_stmt (g); |
4088 | gsi_insert_after (&gsi, def_temp, GSI_NEW_STMT); | |
4089 | avoid_deep_ter_for_debug (def_temp, 0); | |
4090 | } | |
4091 | else | |
4092 | avoid_deep_ter_for_debug (g, depth + 1); | |
4093 | } | |
4094 | } | |
4095 | ||
12c5ffe5 EB |
4096 | /* Return an RTX equivalent to the value of the parameter DECL. */ |
4097 | ||
4098 | static rtx | |
4099 | expand_debug_parm_decl (tree decl) | |
4100 | { | |
4101 | rtx incoming = DECL_INCOMING_RTL (decl); | |
4102 | ||
4103 | if (incoming | |
4104 | && GET_MODE (incoming) != BLKmode | |
4105 | && ((REG_P (incoming) && HARD_REGISTER_P (incoming)) | |
4106 | || (MEM_P (incoming) | |
4107 | && REG_P (XEXP (incoming, 0)) | |
4108 | && HARD_REGISTER_P (XEXP (incoming, 0))))) | |
4109 | { | |
4110 | rtx rtl = gen_rtx_ENTRY_VALUE (GET_MODE (incoming)); | |
4111 | ||
4112 | #ifdef HAVE_window_save | |
4113 | /* DECL_INCOMING_RTL uses the INCOMING_REGNO of parameter registers. | |
4114 | If the target machine has an explicit window save instruction, the | |
4115 | actual entry value is the corresponding OUTGOING_REGNO instead. */ | |
4116 | if (REG_P (incoming) | |
4117 | && OUTGOING_REGNO (REGNO (incoming)) != REGNO (incoming)) | |
4118 | incoming | |
4119 | = gen_rtx_REG_offset (incoming, GET_MODE (incoming), | |
4120 | OUTGOING_REGNO (REGNO (incoming)), 0); | |
4121 | else if (MEM_P (incoming)) | |
4122 | { | |
4123 | rtx reg = XEXP (incoming, 0); | |
4124 | if (OUTGOING_REGNO (REGNO (reg)) != REGNO (reg)) | |
4125 | { | |
4126 | reg = gen_raw_REG (GET_MODE (reg), OUTGOING_REGNO (REGNO (reg))); | |
4127 | incoming = replace_equiv_address_nv (incoming, reg); | |
4128 | } | |
6cfa417f JJ |
4129 | else |
4130 | incoming = copy_rtx (incoming); | |
12c5ffe5 EB |
4131 | } |
4132 | #endif | |
4133 | ||
4134 | ENTRY_VALUE_EXP (rtl) = incoming; | |
4135 | return rtl; | |
4136 | } | |
4137 | ||
4138 | if (incoming | |
4139 | && GET_MODE (incoming) != BLKmode | |
4140 | && !TREE_ADDRESSABLE (decl) | |
4141 | && MEM_P (incoming) | |
4142 | && (XEXP (incoming, 0) == virtual_incoming_args_rtx | |
4143 | || (GET_CODE (XEXP (incoming, 0)) == PLUS | |
4144 | && XEXP (XEXP (incoming, 0), 0) == virtual_incoming_args_rtx | |
4145 | && CONST_INT_P (XEXP (XEXP (incoming, 0), 1))))) | |
6cfa417f | 4146 | return copy_rtx (incoming); |
12c5ffe5 EB |
4147 | |
4148 | return NULL_RTX; | |
4149 | } | |
4150 | ||
4151 | /* Return an RTX equivalent to the value of the tree expression EXP. */ | |
b5b8b0ac AO |
4152 | |
4153 | static rtx | |
4154 | expand_debug_expr (tree exp) | |
4155 | { | |
4156 | rtx op0 = NULL_RTX, op1 = NULL_RTX, op2 = NULL_RTX; | |
ef4bddc2 RS |
4157 | machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); |
4158 | machine_mode inner_mode = VOIDmode; | |
b5b8b0ac | 4159 | int unsignedp = TYPE_UNSIGNED (TREE_TYPE (exp)); |
09e881c9 | 4160 | addr_space_t as; |
7a504f33 | 4161 | scalar_int_mode op0_mode, op1_mode, addr_mode; |
b5b8b0ac AO |
4162 | |
4163 | switch (TREE_CODE_CLASS (TREE_CODE (exp))) | |
4164 | { | |
4165 | case tcc_expression: | |
4166 | switch (TREE_CODE (exp)) | |
4167 | { | |
4168 | case COND_EXPR: | |
7ece48b1 | 4169 | case DOT_PROD_EXPR: |
79d652a5 | 4170 | case SAD_EXPR: |
0354c0c7 BS |
4171 | case WIDEN_MULT_PLUS_EXPR: |
4172 | case WIDEN_MULT_MINUS_EXPR: | |
0f59b812 | 4173 | case FMA_EXPR: |
b5b8b0ac AO |
4174 | goto ternary; |
4175 | ||
4176 | case TRUTH_ANDIF_EXPR: | |
4177 | case TRUTH_ORIF_EXPR: | |
4178 | case TRUTH_AND_EXPR: | |
4179 | case TRUTH_OR_EXPR: | |
4180 | case TRUTH_XOR_EXPR: | |
4181 | goto binary; | |
4182 | ||
4183 | case TRUTH_NOT_EXPR: | |
4184 | goto unary; | |
4185 | ||
4186 | default: | |
4187 | break; | |
4188 | } | |
4189 | break; | |
4190 | ||
4191 | ternary: | |
4192 | op2 = expand_debug_expr (TREE_OPERAND (exp, 2)); | |
4193 | if (!op2) | |
4194 | return NULL_RTX; | |
4195 | /* Fall through. */ | |
4196 | ||
4197 | binary: | |
4198 | case tcc_binary: | |
b5b8b0ac AO |
4199 | op1 = expand_debug_expr (TREE_OPERAND (exp, 1)); |
4200 | if (!op1) | |
4201 | return NULL_RTX; | |
26d83bcc JJ |
4202 | switch (TREE_CODE (exp)) |
4203 | { | |
4204 | case LSHIFT_EXPR: | |
4205 | case RSHIFT_EXPR: | |
4206 | case LROTATE_EXPR: | |
4207 | case RROTATE_EXPR: | |
4208 | case WIDEN_LSHIFT_EXPR: | |
4209 | /* Ensure second operand isn't wider than the first one. */ | |
4210 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 1))); | |
b0567726 RS |
4211 | if (is_a <scalar_int_mode> (inner_mode, &op1_mode) |
4212 | && (GET_MODE_UNIT_PRECISION (mode) | |
4213 | < GET_MODE_PRECISION (op1_mode))) | |
4214 | op1 = lowpart_subreg (GET_MODE_INNER (mode), op1, op1_mode); | |
26d83bcc JJ |
4215 | break; |
4216 | default: | |
4217 | break; | |
4218 | } | |
b5b8b0ac AO |
4219 | /* Fall through. */ |
4220 | ||
4221 | unary: | |
4222 | case tcc_unary: | |
2ba172e0 | 4223 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); |
b5b8b0ac AO |
4224 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); |
4225 | if (!op0) | |
4226 | return NULL_RTX; | |
4227 | break; | |
4228 | ||
871dae34 AO |
4229 | case tcc_comparison: |
4230 | unsignedp = TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
4231 | goto binary; | |
4232 | ||
b5b8b0ac AO |
4233 | case tcc_type: |
4234 | case tcc_statement: | |
4235 | gcc_unreachable (); | |
4236 | ||
4237 | case tcc_constant: | |
4238 | case tcc_exceptional: | |
4239 | case tcc_declaration: | |
4240 | case tcc_reference: | |
4241 | case tcc_vl_exp: | |
4242 | break; | |
4243 | } | |
4244 | ||
4245 | switch (TREE_CODE (exp)) | |
4246 | { | |
4247 | case STRING_CST: | |
4248 | if (!lookup_constant_def (exp)) | |
4249 | { | |
e1b243a8 JJ |
4250 | if (strlen (TREE_STRING_POINTER (exp)) + 1 |
4251 | != (size_t) TREE_STRING_LENGTH (exp)) | |
4252 | return NULL_RTX; | |
b5b8b0ac AO |
4253 | op0 = gen_rtx_CONST_STRING (Pmode, TREE_STRING_POINTER (exp)); |
4254 | op0 = gen_rtx_MEM (BLKmode, op0); | |
4255 | set_mem_attributes (op0, exp, 0); | |
4256 | return op0; | |
4257 | } | |
191816a3 | 4258 | /* Fall through. */ |
b5b8b0ac AO |
4259 | |
4260 | case INTEGER_CST: | |
4261 | case REAL_CST: | |
4262 | case FIXED_CST: | |
4263 | op0 = expand_expr (exp, NULL_RTX, mode, EXPAND_INITIALIZER); | |
4264 | return op0; | |
4265 | ||
4266 | case COMPLEX_CST: | |
4267 | gcc_assert (COMPLEX_MODE_P (mode)); | |
4268 | op0 = expand_debug_expr (TREE_REALPART (exp)); | |
b5b8b0ac | 4269 | op1 = expand_debug_expr (TREE_IMAGPART (exp)); |
b5b8b0ac AO |
4270 | return gen_rtx_CONCAT (mode, op0, op1); |
4271 | ||
0ca5af51 AO |
4272 | case DEBUG_EXPR_DECL: |
4273 | op0 = DECL_RTL_IF_SET (exp); | |
4274 | ||
4275 | if (op0) | |
4276 | return op0; | |
4277 | ||
4278 | op0 = gen_rtx_DEBUG_EXPR (mode); | |
e4fb38bd | 4279 | DEBUG_EXPR_TREE_DECL (op0) = exp; |
0ca5af51 AO |
4280 | SET_DECL_RTL (exp, op0); |
4281 | ||
4282 | return op0; | |
4283 | ||
b5b8b0ac AO |
4284 | case VAR_DECL: |
4285 | case PARM_DECL: | |
4286 | case FUNCTION_DECL: | |
4287 | case LABEL_DECL: | |
4288 | case CONST_DECL: | |
4289 | case RESULT_DECL: | |
4290 | op0 = DECL_RTL_IF_SET (exp); | |
4291 | ||
4292 | /* This decl was probably optimized away. */ | |
4293 | if (!op0) | |
e1b243a8 | 4294 | { |
8813a647 | 4295 | if (!VAR_P (exp) |
e1b243a8 JJ |
4296 | || DECL_EXTERNAL (exp) |
4297 | || !TREE_STATIC (exp) | |
4298 | || !DECL_NAME (exp) | |
0fba566c | 4299 | || DECL_HARD_REGISTER (exp) |
7d5fc814 | 4300 | || DECL_IN_CONSTANT_POOL (exp) |
0fba566c | 4301 | || mode == VOIDmode) |
e1b243a8 JJ |
4302 | return NULL; |
4303 | ||
b1aa0655 | 4304 | op0 = make_decl_rtl_for_debug (exp); |
e1b243a8 JJ |
4305 | if (!MEM_P (op0) |
4306 | || GET_CODE (XEXP (op0, 0)) != SYMBOL_REF | |
4307 | || SYMBOL_REF_DECL (XEXP (op0, 0)) != exp) | |
4308 | return NULL; | |
4309 | } | |
4310 | else | |
4311 | op0 = copy_rtx (op0); | |
b5b8b0ac | 4312 | |
06796564 | 4313 | if (GET_MODE (op0) == BLKmode |
871dae34 | 4314 | /* If op0 is not BLKmode, but mode is, adjust_mode |
06796564 JJ |
4315 | below would ICE. While it is likely a FE bug, |
4316 | try to be robust here. See PR43166. */ | |
132b4e82 JJ |
4317 | || mode == BLKmode |
4318 | || (mode == VOIDmode && GET_MODE (op0) != VOIDmode)) | |
b5b8b0ac AO |
4319 | { |
4320 | gcc_assert (MEM_P (op0)); | |
4321 | op0 = adjust_address_nv (op0, mode, 0); | |
4322 | return op0; | |
4323 | } | |
4324 | ||
4325 | /* Fall through. */ | |
4326 | ||
4327 | adjust_mode: | |
4328 | case PAREN_EXPR: | |
625a9766 | 4329 | CASE_CONVERT: |
b5b8b0ac | 4330 | { |
2ba172e0 | 4331 | inner_mode = GET_MODE (op0); |
b5b8b0ac AO |
4332 | |
4333 | if (mode == inner_mode) | |
4334 | return op0; | |
4335 | ||
4336 | if (inner_mode == VOIDmode) | |
4337 | { | |
2a8e30fb MM |
4338 | if (TREE_CODE (exp) == SSA_NAME) |
4339 | inner_mode = TYPE_MODE (TREE_TYPE (exp)); | |
4340 | else | |
4341 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
b5b8b0ac AO |
4342 | if (mode == inner_mode) |
4343 | return op0; | |
4344 | } | |
4345 | ||
4346 | if (FLOAT_MODE_P (mode) && FLOAT_MODE_P (inner_mode)) | |
4347 | { | |
250a60f3 RS |
4348 | if (GET_MODE_UNIT_BITSIZE (mode) |
4349 | == GET_MODE_UNIT_BITSIZE (inner_mode)) | |
b5b8b0ac | 4350 | op0 = simplify_gen_subreg (mode, op0, inner_mode, 0); |
250a60f3 RS |
4351 | else if (GET_MODE_UNIT_BITSIZE (mode) |
4352 | < GET_MODE_UNIT_BITSIZE (inner_mode)) | |
b5b8b0ac AO |
4353 | op0 = simplify_gen_unary (FLOAT_TRUNCATE, mode, op0, inner_mode); |
4354 | else | |
4355 | op0 = simplify_gen_unary (FLOAT_EXTEND, mode, op0, inner_mode); | |
4356 | } | |
4357 | else if (FLOAT_MODE_P (mode)) | |
4358 | { | |
2a8e30fb | 4359 | gcc_assert (TREE_CODE (exp) != SSA_NAME); |
b5b8b0ac AO |
4360 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
4361 | op0 = simplify_gen_unary (UNSIGNED_FLOAT, mode, op0, inner_mode); | |
4362 | else | |
4363 | op0 = simplify_gen_unary (FLOAT, mode, op0, inner_mode); | |
4364 | } | |
4365 | else if (FLOAT_MODE_P (inner_mode)) | |
4366 | { | |
4367 | if (unsignedp) | |
4368 | op0 = simplify_gen_unary (UNSIGNED_FIX, mode, op0, inner_mode); | |
4369 | else | |
4370 | op0 = simplify_gen_unary (FIX, mode, op0, inner_mode); | |
4371 | } | |
bb06a2d8 RS |
4372 | else if (GET_MODE_UNIT_PRECISION (mode) |
4373 | == GET_MODE_UNIT_PRECISION (inner_mode)) | |
3403a1a9 | 4374 | op0 = lowpart_subreg (mode, op0, inner_mode); |
bb06a2d8 RS |
4375 | else if (GET_MODE_UNIT_PRECISION (mode) |
4376 | < GET_MODE_UNIT_PRECISION (inner_mode)) | |
4377 | op0 = simplify_gen_unary (TRUNCATE, mode, op0, inner_mode); | |
cf4ef6f7 | 4378 | else if (UNARY_CLASS_P (exp) |
1b47fe3f JJ |
4379 | ? TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))) |
4380 | : unsignedp) | |
2ba172e0 | 4381 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); |
b5b8b0ac | 4382 | else |
2ba172e0 | 4383 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); |
b5b8b0ac AO |
4384 | |
4385 | return op0; | |
4386 | } | |
4387 | ||
70f34814 | 4388 | case MEM_REF: |
71f3a3f5 JJ |
4389 | if (!is_gimple_mem_ref_addr (TREE_OPERAND (exp, 0))) |
4390 | { | |
4391 | tree newexp = fold_binary (MEM_REF, TREE_TYPE (exp), | |
4392 | TREE_OPERAND (exp, 0), | |
4393 | TREE_OPERAND (exp, 1)); | |
4394 | if (newexp) | |
4395 | return expand_debug_expr (newexp); | |
4396 | } | |
4397 | /* FALLTHROUGH */ | |
b5b8b0ac | 4398 | case INDIRECT_REF: |
0a81f074 | 4399 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); |
b5b8b0ac AO |
4400 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); |
4401 | if (!op0) | |
4402 | return NULL; | |
4403 | ||
cb115041 JJ |
4404 | if (TREE_CODE (exp) == MEM_REF) |
4405 | { | |
583ac69c JJ |
4406 | if (GET_CODE (op0) == DEBUG_IMPLICIT_PTR |
4407 | || (GET_CODE (op0) == PLUS | |
4408 | && GET_CODE (XEXP (op0, 0)) == DEBUG_IMPLICIT_PTR)) | |
4409 | /* (mem (debug_implicit_ptr)) might confuse aliasing. | |
4410 | Instead just use get_inner_reference. */ | |
4411 | goto component_ref; | |
4412 | ||
cb115041 JJ |
4413 | op1 = expand_debug_expr (TREE_OPERAND (exp, 1)); |
4414 | if (!op1 || !CONST_INT_P (op1)) | |
4415 | return NULL; | |
4416 | ||
0a81f074 | 4417 | op0 = plus_constant (inner_mode, op0, INTVAL (op1)); |
cb115041 JJ |
4418 | } |
4419 | ||
a148c4b2 | 4420 | as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))); |
b5b8b0ac | 4421 | |
f61c6f34 JJ |
4422 | op0 = convert_debug_memory_address (targetm.addr_space.address_mode (as), |
4423 | op0, as); | |
4424 | if (op0 == NULL_RTX) | |
4425 | return NULL; | |
b5b8b0ac | 4426 | |
f61c6f34 | 4427 | op0 = gen_rtx_MEM (mode, op0); |
b5b8b0ac | 4428 | set_mem_attributes (op0, exp, 0); |
71f3a3f5 JJ |
4429 | if (TREE_CODE (exp) == MEM_REF |
4430 | && !is_gimple_mem_ref_addr (TREE_OPERAND (exp, 0))) | |
4431 | set_mem_expr (op0, NULL_TREE); | |
09e881c9 | 4432 | set_mem_addr_space (op0, as); |
b5b8b0ac AO |
4433 | |
4434 | return op0; | |
4435 | ||
4436 | case TARGET_MEM_REF: | |
4d948885 RG |
4437 | if (TREE_CODE (TMR_BASE (exp)) == ADDR_EXPR |
4438 | && !DECL_RTL_SET_P (TREE_OPERAND (TMR_BASE (exp), 0))) | |
b5b8b0ac AO |
4439 | return NULL; |
4440 | ||
4441 | op0 = expand_debug_expr | |
4e25ca6b | 4442 | (tree_mem_ref_addr (build_pointer_type (TREE_TYPE (exp)), exp)); |
b5b8b0ac AO |
4443 | if (!op0) |
4444 | return NULL; | |
4445 | ||
c168f180 | 4446 | as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))); |
f61c6f34 JJ |
4447 | op0 = convert_debug_memory_address (targetm.addr_space.address_mode (as), |
4448 | op0, as); | |
4449 | if (op0 == NULL_RTX) | |
4450 | return NULL; | |
b5b8b0ac AO |
4451 | |
4452 | op0 = gen_rtx_MEM (mode, op0); | |
4453 | ||
4454 | set_mem_attributes (op0, exp, 0); | |
09e881c9 | 4455 | set_mem_addr_space (op0, as); |
b5b8b0ac AO |
4456 | |
4457 | return op0; | |
4458 | ||
583ac69c | 4459 | component_ref: |
b5b8b0ac AO |
4460 | case ARRAY_REF: |
4461 | case ARRAY_RANGE_REF: | |
4462 | case COMPONENT_REF: | |
4463 | case BIT_FIELD_REF: | |
4464 | case REALPART_EXPR: | |
4465 | case IMAGPART_EXPR: | |
4466 | case VIEW_CONVERT_EXPR: | |
4467 | { | |
ef4bddc2 | 4468 | machine_mode mode1; |
b5b8b0ac AO |
4469 | HOST_WIDE_INT bitsize, bitpos; |
4470 | tree offset; | |
ee45a32d EB |
4471 | int reversep, volatilep = 0; |
4472 | tree tem | |
4473 | = get_inner_reference (exp, &bitsize, &bitpos, &offset, &mode1, | |
25b75a48 | 4474 | &unsignedp, &reversep, &volatilep); |
b5b8b0ac AO |
4475 | rtx orig_op0; |
4476 | ||
4f2a9af8 JJ |
4477 | if (bitsize == 0) |
4478 | return NULL; | |
4479 | ||
b5b8b0ac AO |
4480 | orig_op0 = op0 = expand_debug_expr (tem); |
4481 | ||
4482 | if (!op0) | |
4483 | return NULL; | |
4484 | ||
4485 | if (offset) | |
4486 | { | |
ef4bddc2 | 4487 | machine_mode addrmode, offmode; |
dda2da58 | 4488 | |
aa847cc8 JJ |
4489 | if (!MEM_P (op0)) |
4490 | return NULL; | |
b5b8b0ac | 4491 | |
dda2da58 AO |
4492 | op0 = XEXP (op0, 0); |
4493 | addrmode = GET_MODE (op0); | |
4494 | if (addrmode == VOIDmode) | |
4495 | addrmode = Pmode; | |
4496 | ||
b5b8b0ac AO |
4497 | op1 = expand_debug_expr (offset); |
4498 | if (!op1) | |
4499 | return NULL; | |
4500 | ||
dda2da58 AO |
4501 | offmode = GET_MODE (op1); |
4502 | if (offmode == VOIDmode) | |
4503 | offmode = TYPE_MODE (TREE_TYPE (offset)); | |
4504 | ||
4505 | if (addrmode != offmode) | |
3403a1a9 | 4506 | op1 = lowpart_subreg (addrmode, op1, offmode); |
dda2da58 AO |
4507 | |
4508 | /* Don't use offset_address here, we don't need a | |
4509 | recognizable address, and we don't want to generate | |
4510 | code. */ | |
2ba172e0 JJ |
4511 | op0 = gen_rtx_MEM (mode, simplify_gen_binary (PLUS, addrmode, |
4512 | op0, op1)); | |
b5b8b0ac AO |
4513 | } |
4514 | ||
4515 | if (MEM_P (op0)) | |
4516 | { | |
4f2a9af8 JJ |
4517 | if (mode1 == VOIDmode) |
4518 | /* Bitfield. */ | |
f67f4dff | 4519 | mode1 = smallest_int_mode_for_size (bitsize); |
b5b8b0ac AO |
4520 | if (bitpos >= BITS_PER_UNIT) |
4521 | { | |
4522 | op0 = adjust_address_nv (op0, mode1, bitpos / BITS_PER_UNIT); | |
4523 | bitpos %= BITS_PER_UNIT; | |
4524 | } | |
4525 | else if (bitpos < 0) | |
4526 | { | |
4f2a9af8 JJ |
4527 | HOST_WIDE_INT units |
4528 | = (-bitpos + BITS_PER_UNIT - 1) / BITS_PER_UNIT; | |
e3abc83e | 4529 | op0 = adjust_address_nv (op0, mode1, -units); |
b5b8b0ac AO |
4530 | bitpos += units * BITS_PER_UNIT; |
4531 | } | |
4532 | else if (bitpos == 0 && bitsize == GET_MODE_BITSIZE (mode)) | |
4533 | op0 = adjust_address_nv (op0, mode, 0); | |
4534 | else if (GET_MODE (op0) != mode1) | |
4535 | op0 = adjust_address_nv (op0, mode1, 0); | |
4536 | else | |
4537 | op0 = copy_rtx (op0); | |
4538 | if (op0 == orig_op0) | |
4539 | op0 = shallow_copy_rtx (op0); | |
4540 | set_mem_attributes (op0, exp, 0); | |
4541 | } | |
4542 | ||
4543 | if (bitpos == 0 && mode == GET_MODE (op0)) | |
4544 | return op0; | |
4545 | ||
2d3fc6aa JJ |
4546 | if (bitpos < 0) |
4547 | return NULL; | |
4548 | ||
88c04a5d JJ |
4549 | if (GET_MODE (op0) == BLKmode) |
4550 | return NULL; | |
4551 | ||
b5b8b0ac AO |
4552 | if ((bitpos % BITS_PER_UNIT) == 0 |
4553 | && bitsize == GET_MODE_BITSIZE (mode1)) | |
4554 | { | |
ef4bddc2 | 4555 | machine_mode opmode = GET_MODE (op0); |
b5b8b0ac | 4556 | |
b5b8b0ac | 4557 | if (opmode == VOIDmode) |
9712cba0 | 4558 | opmode = TYPE_MODE (TREE_TYPE (tem)); |
b5b8b0ac AO |
4559 | |
4560 | /* This condition may hold if we're expanding the address | |
4561 | right past the end of an array that turned out not to | |
4562 | be addressable (i.e., the address was only computed in | |
4563 | debug stmts). The gen_subreg below would rightfully | |
4564 | crash, and the address doesn't really exist, so just | |
4565 | drop it. */ | |
4566 | if (bitpos >= GET_MODE_BITSIZE (opmode)) | |
4567 | return NULL; | |
4568 | ||
7d5d39bb JJ |
4569 | if ((bitpos % GET_MODE_BITSIZE (mode)) == 0) |
4570 | return simplify_gen_subreg (mode, op0, opmode, | |
4571 | bitpos / BITS_PER_UNIT); | |
b5b8b0ac AO |
4572 | } |
4573 | ||
4574 | return simplify_gen_ternary (SCALAR_INT_MODE_P (GET_MODE (op0)) | |
4575 | && TYPE_UNSIGNED (TREE_TYPE (exp)) | |
4576 | ? SIGN_EXTRACT | |
4577 | : ZERO_EXTRACT, mode, | |
4578 | GET_MODE (op0) != VOIDmode | |
9712cba0 JJ |
4579 | ? GET_MODE (op0) |
4580 | : TYPE_MODE (TREE_TYPE (tem)), | |
b5b8b0ac AO |
4581 | op0, GEN_INT (bitsize), GEN_INT (bitpos)); |
4582 | } | |
4583 | ||
b5b8b0ac | 4584 | case ABS_EXPR: |
2ba172e0 | 4585 | return simplify_gen_unary (ABS, mode, op0, mode); |
b5b8b0ac AO |
4586 | |
4587 | case NEGATE_EXPR: | |
2ba172e0 | 4588 | return simplify_gen_unary (NEG, mode, op0, mode); |
b5b8b0ac AO |
4589 | |
4590 | case BIT_NOT_EXPR: | |
2ba172e0 | 4591 | return simplify_gen_unary (NOT, mode, op0, mode); |
b5b8b0ac AO |
4592 | |
4593 | case FLOAT_EXPR: | |
2ba172e0 JJ |
4594 | return simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, |
4595 | 0))) | |
4596 | ? UNSIGNED_FLOAT : FLOAT, mode, op0, | |
4597 | inner_mode); | |
b5b8b0ac AO |
4598 | |
4599 | case FIX_TRUNC_EXPR: | |
2ba172e0 JJ |
4600 | return simplify_gen_unary (unsignedp ? UNSIGNED_FIX : FIX, mode, op0, |
4601 | inner_mode); | |
b5b8b0ac AO |
4602 | |
4603 | case POINTER_PLUS_EXPR: | |
576319a7 DD |
4604 | /* For the rare target where pointers are not the same size as |
4605 | size_t, we need to check for mis-matched modes and correct | |
4606 | the addend. */ | |
4607 | if (op0 && op1 | |
673bf5a6 RS |
4608 | && is_a <scalar_int_mode> (GET_MODE (op0), &op0_mode) |
4609 | && is_a <scalar_int_mode> (GET_MODE (op1), &op1_mode) | |
4610 | && op0_mode != op1_mode) | |
576319a7 | 4611 | { |
673bf5a6 RS |
4612 | if (GET_MODE_BITSIZE (op0_mode) < GET_MODE_BITSIZE (op1_mode) |
4613 | /* If OP0 is a partial mode, then we must truncate, even | |
4614 | if it has the same bitsize as OP1 as GCC's | |
4615 | representation of partial modes is opaque. */ | |
4616 | || (GET_MODE_CLASS (op0_mode) == MODE_PARTIAL_INT | |
4617 | && (GET_MODE_BITSIZE (op0_mode) | |
4618 | == GET_MODE_BITSIZE (op1_mode)))) | |
4619 | op1 = simplify_gen_unary (TRUNCATE, op0_mode, op1, op1_mode); | |
576319a7 DD |
4620 | else |
4621 | /* We always sign-extend, regardless of the signedness of | |
4622 | the operand, because the operand is always unsigned | |
4623 | here even if the original C expression is signed. */ | |
673bf5a6 | 4624 | op1 = simplify_gen_unary (SIGN_EXTEND, op0_mode, op1, op1_mode); |
576319a7 DD |
4625 | } |
4626 | /* Fall through. */ | |
b5b8b0ac | 4627 | case PLUS_EXPR: |
2ba172e0 | 4628 | return simplify_gen_binary (PLUS, mode, op0, op1); |
b5b8b0ac AO |
4629 | |
4630 | case MINUS_EXPR: | |
2ba172e0 | 4631 | return simplify_gen_binary (MINUS, mode, op0, op1); |
b5b8b0ac AO |
4632 | |
4633 | case MULT_EXPR: | |
2ba172e0 | 4634 | return simplify_gen_binary (MULT, mode, op0, op1); |
b5b8b0ac AO |
4635 | |
4636 | case RDIV_EXPR: | |
4637 | case TRUNC_DIV_EXPR: | |
4638 | case EXACT_DIV_EXPR: | |
4639 | if (unsignedp) | |
2ba172e0 | 4640 | return simplify_gen_binary (UDIV, mode, op0, op1); |
b5b8b0ac | 4641 | else |
2ba172e0 | 4642 | return simplify_gen_binary (DIV, mode, op0, op1); |
b5b8b0ac AO |
4643 | |
4644 | case TRUNC_MOD_EXPR: | |
2ba172e0 | 4645 | return simplify_gen_binary (unsignedp ? UMOD : MOD, mode, op0, op1); |
b5b8b0ac AO |
4646 | |
4647 | case FLOOR_DIV_EXPR: | |
4648 | if (unsignedp) | |
2ba172e0 | 4649 | return simplify_gen_binary (UDIV, mode, op0, op1); |
b5b8b0ac AO |
4650 | else |
4651 | { | |
2ba172e0 JJ |
4652 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4653 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4654 | rtx adj = floor_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4655 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4656 | } |
4657 | ||
4658 | case FLOOR_MOD_EXPR: | |
4659 | if (unsignedp) | |
2ba172e0 | 4660 | return simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac AO |
4661 | else |
4662 | { | |
2ba172e0 | 4663 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4664 | rtx adj = floor_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4665 | adj = simplify_gen_unary (NEG, mode, |
4666 | simplify_gen_binary (MULT, mode, adj, op1), | |
4667 | mode); | |
4668 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4669 | } |
4670 | ||
4671 | case CEIL_DIV_EXPR: | |
4672 | if (unsignedp) | |
4673 | { | |
2ba172e0 JJ |
4674 | rtx div = simplify_gen_binary (UDIV, mode, op0, op1); |
4675 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); | |
b5b8b0ac | 4676 | rtx adj = ceil_udiv_adjust (mode, mod, op1); |
2ba172e0 | 4677 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4678 | } |
4679 | else | |
4680 | { | |
2ba172e0 JJ |
4681 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4682 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4683 | rtx adj = ceil_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4684 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4685 | } |
4686 | ||
4687 | case CEIL_MOD_EXPR: | |
4688 | if (unsignedp) | |
4689 | { | |
2ba172e0 | 4690 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac | 4691 | rtx adj = ceil_udiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4692 | adj = simplify_gen_unary (NEG, mode, |
4693 | simplify_gen_binary (MULT, mode, adj, op1), | |
4694 | mode); | |
4695 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4696 | } |
4697 | else | |
4698 | { | |
2ba172e0 | 4699 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4700 | rtx adj = ceil_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4701 | adj = simplify_gen_unary (NEG, mode, |
4702 | simplify_gen_binary (MULT, mode, adj, op1), | |
4703 | mode); | |
4704 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4705 | } |
4706 | ||
4707 | case ROUND_DIV_EXPR: | |
4708 | if (unsignedp) | |
4709 | { | |
2ba172e0 JJ |
4710 | rtx div = simplify_gen_binary (UDIV, mode, op0, op1); |
4711 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); | |
b5b8b0ac | 4712 | rtx adj = round_udiv_adjust (mode, mod, op1); |
2ba172e0 | 4713 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4714 | } |
4715 | else | |
4716 | { | |
2ba172e0 JJ |
4717 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4718 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4719 | rtx adj = round_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4720 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4721 | } |
4722 | ||
4723 | case ROUND_MOD_EXPR: | |
4724 | if (unsignedp) | |
4725 | { | |
2ba172e0 | 4726 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac | 4727 | rtx adj = round_udiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4728 | adj = simplify_gen_unary (NEG, mode, |
4729 | simplify_gen_binary (MULT, mode, adj, op1), | |
4730 | mode); | |
4731 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4732 | } |
4733 | else | |
4734 | { | |
2ba172e0 | 4735 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4736 | rtx adj = round_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4737 | adj = simplify_gen_unary (NEG, mode, |
4738 | simplify_gen_binary (MULT, mode, adj, op1), | |
4739 | mode); | |
4740 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4741 | } |
4742 | ||
4743 | case LSHIFT_EXPR: | |
2ba172e0 | 4744 | return simplify_gen_binary (ASHIFT, mode, op0, op1); |
b5b8b0ac AO |
4745 | |
4746 | case RSHIFT_EXPR: | |
4747 | if (unsignedp) | |
2ba172e0 | 4748 | return simplify_gen_binary (LSHIFTRT, mode, op0, op1); |
b5b8b0ac | 4749 | else |
2ba172e0 | 4750 | return simplify_gen_binary (ASHIFTRT, mode, op0, op1); |
b5b8b0ac AO |
4751 | |
4752 | case LROTATE_EXPR: | |
2ba172e0 | 4753 | return simplify_gen_binary (ROTATE, mode, op0, op1); |
b5b8b0ac AO |
4754 | |
4755 | case RROTATE_EXPR: | |
2ba172e0 | 4756 | return simplify_gen_binary (ROTATERT, mode, op0, op1); |
b5b8b0ac AO |
4757 | |
4758 | case MIN_EXPR: | |
2ba172e0 | 4759 | return simplify_gen_binary (unsignedp ? UMIN : SMIN, mode, op0, op1); |
b5b8b0ac AO |
4760 | |
4761 | case MAX_EXPR: | |
2ba172e0 | 4762 | return simplify_gen_binary (unsignedp ? UMAX : SMAX, mode, op0, op1); |
b5b8b0ac AO |
4763 | |
4764 | case BIT_AND_EXPR: | |
4765 | case TRUTH_AND_EXPR: | |
2ba172e0 | 4766 | return simplify_gen_binary (AND, mode, op0, op1); |
b5b8b0ac AO |
4767 | |
4768 | case BIT_IOR_EXPR: | |
4769 | case TRUTH_OR_EXPR: | |
2ba172e0 | 4770 | return simplify_gen_binary (IOR, mode, op0, op1); |
b5b8b0ac AO |
4771 | |
4772 | case BIT_XOR_EXPR: | |
4773 | case TRUTH_XOR_EXPR: | |
2ba172e0 | 4774 | return simplify_gen_binary (XOR, mode, op0, op1); |
b5b8b0ac AO |
4775 | |
4776 | case TRUTH_ANDIF_EXPR: | |
4777 | return gen_rtx_IF_THEN_ELSE (mode, op0, op1, const0_rtx); | |
4778 | ||
4779 | case TRUTH_ORIF_EXPR: | |
4780 | return gen_rtx_IF_THEN_ELSE (mode, op0, const_true_rtx, op1); | |
4781 | ||
4782 | case TRUTH_NOT_EXPR: | |
2ba172e0 | 4783 | return simplify_gen_relational (EQ, mode, inner_mode, op0, const0_rtx); |
b5b8b0ac AO |
4784 | |
4785 | case LT_EXPR: | |
2ba172e0 JJ |
4786 | return simplify_gen_relational (unsignedp ? LTU : LT, mode, inner_mode, |
4787 | op0, op1); | |
b5b8b0ac AO |
4788 | |
4789 | case LE_EXPR: | |
2ba172e0 JJ |
4790 | return simplify_gen_relational (unsignedp ? LEU : LE, mode, inner_mode, |
4791 | op0, op1); | |
b5b8b0ac AO |
4792 | |
4793 | case GT_EXPR: | |
2ba172e0 JJ |
4794 | return simplify_gen_relational (unsignedp ? GTU : GT, mode, inner_mode, |
4795 | op0, op1); | |
b5b8b0ac AO |
4796 | |
4797 | case GE_EXPR: | |
2ba172e0 JJ |
4798 | return simplify_gen_relational (unsignedp ? GEU : GE, mode, inner_mode, |
4799 | op0, op1); | |
b5b8b0ac AO |
4800 | |
4801 | case EQ_EXPR: | |
2ba172e0 | 4802 | return simplify_gen_relational (EQ, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4803 | |
4804 | case NE_EXPR: | |
2ba172e0 | 4805 | return simplify_gen_relational (NE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4806 | |
4807 | case UNORDERED_EXPR: | |
2ba172e0 | 4808 | return simplify_gen_relational (UNORDERED, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4809 | |
4810 | case ORDERED_EXPR: | |
2ba172e0 | 4811 | return simplify_gen_relational (ORDERED, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4812 | |
4813 | case UNLT_EXPR: | |
2ba172e0 | 4814 | return simplify_gen_relational (UNLT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4815 | |
4816 | case UNLE_EXPR: | |
2ba172e0 | 4817 | return simplify_gen_relational (UNLE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4818 | |
4819 | case UNGT_EXPR: | |
2ba172e0 | 4820 | return simplify_gen_relational (UNGT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4821 | |
4822 | case UNGE_EXPR: | |
2ba172e0 | 4823 | return simplify_gen_relational (UNGE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4824 | |
4825 | case UNEQ_EXPR: | |
2ba172e0 | 4826 | return simplify_gen_relational (UNEQ, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4827 | |
4828 | case LTGT_EXPR: | |
2ba172e0 | 4829 | return simplify_gen_relational (LTGT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4830 | |
4831 | case COND_EXPR: | |
4832 | return gen_rtx_IF_THEN_ELSE (mode, op0, op1, op2); | |
4833 | ||
4834 | case COMPLEX_EXPR: | |
4835 | gcc_assert (COMPLEX_MODE_P (mode)); | |
4836 | if (GET_MODE (op0) == VOIDmode) | |
4837 | op0 = gen_rtx_CONST (GET_MODE_INNER (mode), op0); | |
4838 | if (GET_MODE (op1) == VOIDmode) | |
4839 | op1 = gen_rtx_CONST (GET_MODE_INNER (mode), op1); | |
4840 | return gen_rtx_CONCAT (mode, op0, op1); | |
4841 | ||
d02a5a4b JJ |
4842 | case CONJ_EXPR: |
4843 | if (GET_CODE (op0) == CONCAT) | |
4844 | return gen_rtx_CONCAT (mode, XEXP (op0, 0), | |
2ba172e0 JJ |
4845 | simplify_gen_unary (NEG, GET_MODE_INNER (mode), |
4846 | XEXP (op0, 1), | |
4847 | GET_MODE_INNER (mode))); | |
d02a5a4b JJ |
4848 | else |
4849 | { | |
d21cefc2 | 4850 | scalar_mode imode = GET_MODE_INNER (mode); |
d02a5a4b JJ |
4851 | rtx re, im; |
4852 | ||
4853 | if (MEM_P (op0)) | |
4854 | { | |
4855 | re = adjust_address_nv (op0, imode, 0); | |
4856 | im = adjust_address_nv (op0, imode, GET_MODE_SIZE (imode)); | |
4857 | } | |
4858 | else | |
4859 | { | |
304b9962 RS |
4860 | scalar_int_mode ifmode; |
4861 | scalar_int_mode ihmode; | |
d02a5a4b | 4862 | rtx halfsize; |
304b9962 RS |
4863 | if (!int_mode_for_mode (mode).exists (&ifmode) |
4864 | || !int_mode_for_mode (imode).exists (&ihmode)) | |
d02a5a4b JJ |
4865 | return NULL; |
4866 | halfsize = GEN_INT (GET_MODE_BITSIZE (ihmode)); | |
4867 | re = op0; | |
4868 | if (mode != ifmode) | |
4869 | re = gen_rtx_SUBREG (ifmode, re, 0); | |
4870 | re = gen_rtx_ZERO_EXTRACT (ihmode, re, halfsize, const0_rtx); | |
4871 | if (imode != ihmode) | |
4872 | re = gen_rtx_SUBREG (imode, re, 0); | |
4873 | im = copy_rtx (op0); | |
4874 | if (mode != ifmode) | |
4875 | im = gen_rtx_SUBREG (ifmode, im, 0); | |
4876 | im = gen_rtx_ZERO_EXTRACT (ihmode, im, halfsize, halfsize); | |
4877 | if (imode != ihmode) | |
4878 | im = gen_rtx_SUBREG (imode, im, 0); | |
4879 | } | |
4880 | im = gen_rtx_NEG (imode, im); | |
4881 | return gen_rtx_CONCAT (mode, re, im); | |
4882 | } | |
4883 | ||
b5b8b0ac AO |
4884 | case ADDR_EXPR: |
4885 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); | |
4886 | if (!op0 || !MEM_P (op0)) | |
c8a27c40 JJ |
4887 | { |
4888 | if ((TREE_CODE (TREE_OPERAND (exp, 0)) == VAR_DECL | |
4889 | || TREE_CODE (TREE_OPERAND (exp, 0)) == PARM_DECL | |
4890 | || TREE_CODE (TREE_OPERAND (exp, 0)) == RESULT_DECL) | |
f8cca67b JJ |
4891 | && (!TREE_ADDRESSABLE (TREE_OPERAND (exp, 0)) |
4892 | || target_for_debug_bind (TREE_OPERAND (exp, 0)))) | |
c8a27c40 JJ |
4893 | return gen_rtx_DEBUG_IMPLICIT_PTR (mode, TREE_OPERAND (exp, 0)); |
4894 | ||
4895 | if (handled_component_p (TREE_OPERAND (exp, 0))) | |
4896 | { | |
4897 | HOST_WIDE_INT bitoffset, bitsize, maxsize; | |
ee45a32d | 4898 | bool reverse; |
c8a27c40 | 4899 | tree decl |
ee45a32d EB |
4900 | = get_ref_base_and_extent (TREE_OPERAND (exp, 0), &bitoffset, |
4901 | &bitsize, &maxsize, &reverse); | |
8813a647 | 4902 | if ((VAR_P (decl) |
c8a27c40 JJ |
4903 | || TREE_CODE (decl) == PARM_DECL |
4904 | || TREE_CODE (decl) == RESULT_DECL) | |
f8cca67b JJ |
4905 | && (!TREE_ADDRESSABLE (decl) |
4906 | || target_for_debug_bind (decl)) | |
c8a27c40 JJ |
4907 | && (bitoffset % BITS_PER_UNIT) == 0 |
4908 | && bitsize > 0 | |
4909 | && bitsize == maxsize) | |
0a81f074 RS |
4910 | { |
4911 | rtx base = gen_rtx_DEBUG_IMPLICIT_PTR (mode, decl); | |
4912 | return plus_constant (mode, base, bitoffset / BITS_PER_UNIT); | |
4913 | } | |
c8a27c40 JJ |
4914 | } |
4915 | ||
9430b7ba JJ |
4916 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == MEM_REF |
4917 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)) | |
4918 | == ADDR_EXPR) | |
4919 | { | |
4920 | op0 = expand_debug_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), | |
4921 | 0)); | |
4922 | if (op0 != NULL | |
4923 | && (GET_CODE (op0) == DEBUG_IMPLICIT_PTR | |
4924 | || (GET_CODE (op0) == PLUS | |
4925 | && GET_CODE (XEXP (op0, 0)) == DEBUG_IMPLICIT_PTR | |
4926 | && CONST_INT_P (XEXP (op0, 1))))) | |
4927 | { | |
4928 | op1 = expand_debug_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), | |
4929 | 1)); | |
4930 | if (!op1 || !CONST_INT_P (op1)) | |
4931 | return NULL; | |
4932 | ||
4933 | return plus_constant (mode, op0, INTVAL (op1)); | |
4934 | } | |
4935 | } | |
4936 | ||
c8a27c40 JJ |
4937 | return NULL; |
4938 | } | |
b5b8b0ac | 4939 | |
a148c4b2 | 4940 | as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp))); |
7a504f33 RS |
4941 | addr_mode = SCALAR_INT_TYPE_MODE (TREE_TYPE (exp)); |
4942 | op0 = convert_debug_memory_address (addr_mode, XEXP (op0, 0), as); | |
dda2da58 AO |
4943 | |
4944 | return op0; | |
b5b8b0ac AO |
4945 | |
4946 | case VECTOR_CST: | |
d2a12ae7 | 4947 | { |
9e822269 | 4948 | unsigned i, nelts; |
d2a12ae7 | 4949 | |
9e822269 RS |
4950 | nelts = VECTOR_CST_NELTS (exp); |
4951 | op0 = gen_rtx_CONCATN (mode, rtvec_alloc (nelts)); | |
d2a12ae7 | 4952 | |
9e822269 | 4953 | for (i = 0; i < nelts; ++i) |
d2a12ae7 RG |
4954 | { |
4955 | op1 = expand_debug_expr (VECTOR_CST_ELT (exp, i)); | |
4956 | if (!op1) | |
4957 | return NULL; | |
4958 | XVECEXP (op0, 0, i) = op1; | |
4959 | } | |
4960 | ||
4961 | return op0; | |
4962 | } | |
b5b8b0ac AO |
4963 | |
4964 | case CONSTRUCTOR: | |
47598145 MM |
4965 | if (TREE_CLOBBER_P (exp)) |
4966 | return NULL; | |
4967 | else if (TREE_CODE (TREE_TYPE (exp)) == VECTOR_TYPE) | |
b5b8b0ac AO |
4968 | { |
4969 | unsigned i; | |
4970 | tree val; | |
4971 | ||
4972 | op0 = gen_rtx_CONCATN | |
4973 | (mode, rtvec_alloc (TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)))); | |
4974 | ||
4975 | FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), i, val) | |
4976 | { | |
4977 | op1 = expand_debug_expr (val); | |
4978 | if (!op1) | |
4979 | return NULL; | |
4980 | XVECEXP (op0, 0, i) = op1; | |
4981 | } | |
4982 | ||
4983 | if (i < TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp))) | |
4984 | { | |
4985 | op1 = expand_debug_expr | |
e8160c9a | 4986 | (build_zero_cst (TREE_TYPE (TREE_TYPE (exp)))); |
b5b8b0ac AO |
4987 | |
4988 | if (!op1) | |
4989 | return NULL; | |
4990 | ||
4991 | for (; i < TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)); i++) | |
4992 | XVECEXP (op0, 0, i) = op1; | |
4993 | } | |
4994 | ||
4995 | return op0; | |
4996 | } | |
4997 | else | |
4998 | goto flag_unsupported; | |
4999 | ||
5000 | case CALL_EXPR: | |
5001 | /* ??? Maybe handle some builtins? */ | |
5002 | return NULL; | |
5003 | ||
5004 | case SSA_NAME: | |
5005 | { | |
355fe088 | 5006 | gimple *g = get_gimple_for_ssa_name (exp); |
2a8e30fb MM |
5007 | if (g) |
5008 | { | |
dfde35b3 JJ |
5009 | tree t = NULL_TREE; |
5010 | if (deep_ter_debug_map) | |
5011 | { | |
5012 | tree *slot = deep_ter_debug_map->get (exp); | |
5013 | if (slot) | |
5014 | t = *slot; | |
5015 | } | |
5016 | if (t == NULL_TREE) | |
5017 | t = gimple_assign_rhs_to_tree (g); | |
5018 | op0 = expand_debug_expr (t); | |
2a8e30fb MM |
5019 | if (!op0) |
5020 | return NULL; | |
5021 | } | |
5022 | else | |
5023 | { | |
f11a7b6d AO |
5024 | /* If this is a reference to an incoming value of |
5025 | parameter that is never used in the code or where the | |
5026 | incoming value is never used in the code, use | |
5027 | PARM_DECL's DECL_RTL if set. */ | |
5028 | if (SSA_NAME_IS_DEFAULT_DEF (exp) | |
5029 | && SSA_NAME_VAR (exp) | |
5030 | && TREE_CODE (SSA_NAME_VAR (exp)) == PARM_DECL | |
5031 | && has_zero_uses (exp)) | |
5032 | { | |
5033 | op0 = expand_debug_parm_decl (SSA_NAME_VAR (exp)); | |
5034 | if (op0) | |
5035 | goto adjust_mode; | |
5036 | op0 = expand_debug_expr (SSA_NAME_VAR (exp)); | |
5037 | if (op0) | |
5038 | goto adjust_mode; | |
5039 | } | |
5040 | ||
2a8e30fb | 5041 | int part = var_to_partition (SA.map, exp); |
b5b8b0ac | 5042 | |
2a8e30fb | 5043 | if (part == NO_PARTITION) |
f11a7b6d | 5044 | return NULL; |
b5b8b0ac | 5045 | |
2a8e30fb | 5046 | gcc_assert (part >= 0 && (unsigned)part < SA.map->num_partitions); |
b5b8b0ac | 5047 | |
abfea58d | 5048 | op0 = copy_rtx (SA.partition_to_pseudo[part]); |
2a8e30fb | 5049 | } |
b5b8b0ac AO |
5050 | goto adjust_mode; |
5051 | } | |
5052 | ||
5053 | case ERROR_MARK: | |
5054 | return NULL; | |
5055 | ||
7ece48b1 JJ |
5056 | /* Vector stuff. For most of the codes we don't have rtl codes. */ |
5057 | case REALIGN_LOAD_EXPR: | |
5058 | case REDUC_MAX_EXPR: | |
5059 | case REDUC_MIN_EXPR: | |
5060 | case REDUC_PLUS_EXPR: | |
5061 | case VEC_COND_EXPR: | |
7ece48b1 JJ |
5062 | case VEC_PACK_FIX_TRUNC_EXPR: |
5063 | case VEC_PACK_SAT_EXPR: | |
5064 | case VEC_PACK_TRUNC_EXPR: | |
7ece48b1 JJ |
5065 | case VEC_UNPACK_FLOAT_HI_EXPR: |
5066 | case VEC_UNPACK_FLOAT_LO_EXPR: | |
5067 | case VEC_UNPACK_HI_EXPR: | |
5068 | case VEC_UNPACK_LO_EXPR: | |
5069 | case VEC_WIDEN_MULT_HI_EXPR: | |
5070 | case VEC_WIDEN_MULT_LO_EXPR: | |
3f30a9a6 RH |
5071 | case VEC_WIDEN_MULT_EVEN_EXPR: |
5072 | case VEC_WIDEN_MULT_ODD_EXPR: | |
36ba4aae IR |
5073 | case VEC_WIDEN_LSHIFT_HI_EXPR: |
5074 | case VEC_WIDEN_LSHIFT_LO_EXPR: | |
3f3af9df | 5075 | case VEC_PERM_EXPR: |
7ece48b1 JJ |
5076 | return NULL; |
5077 | ||
98449720 | 5078 | /* Misc codes. */ |
7ece48b1 JJ |
5079 | case ADDR_SPACE_CONVERT_EXPR: |
5080 | case FIXED_CONVERT_EXPR: | |
5081 | case OBJ_TYPE_REF: | |
5082 | case WITH_SIZE_EXPR: | |
483c6429 | 5083 | case BIT_INSERT_EXPR: |
7ece48b1 JJ |
5084 | return NULL; |
5085 | ||
5086 | case DOT_PROD_EXPR: | |
5087 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) | |
5088 | && SCALAR_INT_MODE_P (mode)) | |
5089 | { | |
2ba172e0 JJ |
5090 | op0 |
5091 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
5092 | 0))) | |
5093 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op0, | |
5094 | inner_mode); | |
5095 | op1 | |
5096 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
5097 | 1))) | |
5098 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op1, | |
5099 | inner_mode); | |
5100 | op0 = simplify_gen_binary (MULT, mode, op0, op1); | |
5101 | return simplify_gen_binary (PLUS, mode, op0, op2); | |
7ece48b1 JJ |
5102 | } |
5103 | return NULL; | |
5104 | ||
5105 | case WIDEN_MULT_EXPR: | |
0354c0c7 BS |
5106 | case WIDEN_MULT_PLUS_EXPR: |
5107 | case WIDEN_MULT_MINUS_EXPR: | |
7ece48b1 JJ |
5108 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) |
5109 | && SCALAR_INT_MODE_P (mode)) | |
5110 | { | |
2ba172e0 | 5111 | inner_mode = GET_MODE (op0); |
7ece48b1 | 5112 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
5b58b39b | 5113 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); |
7ece48b1 | 5114 | else |
5b58b39b | 5115 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); |
7ece48b1 | 5116 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 1)))) |
5b58b39b | 5117 | op1 = simplify_gen_unary (ZERO_EXTEND, mode, op1, inner_mode); |
7ece48b1 | 5118 | else |
5b58b39b | 5119 | op1 = simplify_gen_unary (SIGN_EXTEND, mode, op1, inner_mode); |
2ba172e0 | 5120 | op0 = simplify_gen_binary (MULT, mode, op0, op1); |
0354c0c7 BS |
5121 | if (TREE_CODE (exp) == WIDEN_MULT_EXPR) |
5122 | return op0; | |
5123 | else if (TREE_CODE (exp) == WIDEN_MULT_PLUS_EXPR) | |
2ba172e0 | 5124 | return simplify_gen_binary (PLUS, mode, op0, op2); |
0354c0c7 | 5125 | else |
2ba172e0 | 5126 | return simplify_gen_binary (MINUS, mode, op2, op0); |
7ece48b1 JJ |
5127 | } |
5128 | return NULL; | |
5129 | ||
98449720 RH |
5130 | case MULT_HIGHPART_EXPR: |
5131 | /* ??? Similar to the above. */ | |
5132 | return NULL; | |
5133 | ||
7ece48b1 | 5134 | case WIDEN_SUM_EXPR: |
3f3af9df | 5135 | case WIDEN_LSHIFT_EXPR: |
7ece48b1 JJ |
5136 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) |
5137 | && SCALAR_INT_MODE_P (mode)) | |
5138 | { | |
2ba172e0 JJ |
5139 | op0 |
5140 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
5141 | 0))) | |
5142 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op0, | |
5143 | inner_mode); | |
3f3af9df JJ |
5144 | return simplify_gen_binary (TREE_CODE (exp) == WIDEN_LSHIFT_EXPR |
5145 | ? ASHIFT : PLUS, mode, op0, op1); | |
7ece48b1 JJ |
5146 | } |
5147 | return NULL; | |
5148 | ||
0f59b812 | 5149 | case FMA_EXPR: |
2ba172e0 | 5150 | return simplify_gen_ternary (FMA, mode, inner_mode, op0, op1, op2); |
0f59b812 | 5151 | |
b5b8b0ac AO |
5152 | default: |
5153 | flag_unsupported: | |
b2b29377 MM |
5154 | if (flag_checking) |
5155 | { | |
5156 | debug_tree (exp); | |
5157 | gcc_unreachable (); | |
5158 | } | |
b5b8b0ac | 5159 | return NULL; |
b5b8b0ac AO |
5160 | } |
5161 | } | |
5162 | ||
ddb555ed JJ |
5163 | /* Return an RTX equivalent to the source bind value of the tree expression |
5164 | EXP. */ | |
5165 | ||
5166 | static rtx | |
5167 | expand_debug_source_expr (tree exp) | |
5168 | { | |
5169 | rtx op0 = NULL_RTX; | |
ef4bddc2 | 5170 | machine_mode mode = VOIDmode, inner_mode; |
ddb555ed JJ |
5171 | |
5172 | switch (TREE_CODE (exp)) | |
5173 | { | |
5174 | case PARM_DECL: | |
5175 | { | |
ddb555ed | 5176 | mode = DECL_MODE (exp); |
12c5ffe5 EB |
5177 | op0 = expand_debug_parm_decl (exp); |
5178 | if (op0) | |
5179 | break; | |
ddb555ed JJ |
5180 | /* See if this isn't an argument that has been completely |
5181 | optimized out. */ | |
5182 | if (!DECL_RTL_SET_P (exp) | |
12c5ffe5 | 5183 | && !DECL_INCOMING_RTL (exp) |
ddb555ed JJ |
5184 | && DECL_ABSTRACT_ORIGIN (current_function_decl)) |
5185 | { | |
7b575cfa | 5186 | tree aexp = DECL_ORIGIN (exp); |
ddb555ed JJ |
5187 | if (DECL_CONTEXT (aexp) |
5188 | == DECL_ABSTRACT_ORIGIN (current_function_decl)) | |
5189 | { | |
9771b263 | 5190 | vec<tree, va_gc> **debug_args; |
ddb555ed JJ |
5191 | unsigned int ix; |
5192 | tree ddecl; | |
ddb555ed JJ |
5193 | debug_args = decl_debug_args_lookup (current_function_decl); |
5194 | if (debug_args != NULL) | |
5195 | { | |
9771b263 | 5196 | for (ix = 0; vec_safe_iterate (*debug_args, ix, &ddecl); |
ddb555ed JJ |
5197 | ix += 2) |
5198 | if (ddecl == aexp) | |
5199 | return gen_rtx_DEBUG_PARAMETER_REF (mode, aexp); | |
5200 | } | |
5201 | } | |
5202 | } | |
5203 | break; | |
5204 | } | |
5205 | default: | |
5206 | break; | |
5207 | } | |
5208 | ||
5209 | if (op0 == NULL_RTX) | |
5210 | return NULL_RTX; | |
5211 | ||
5212 | inner_mode = GET_MODE (op0); | |
5213 | if (mode == inner_mode) | |
5214 | return op0; | |
5215 | ||
5216 | if (FLOAT_MODE_P (mode) && FLOAT_MODE_P (inner_mode)) | |
5217 | { | |
250a60f3 RS |
5218 | if (GET_MODE_UNIT_BITSIZE (mode) |
5219 | == GET_MODE_UNIT_BITSIZE (inner_mode)) | |
ddb555ed | 5220 | op0 = simplify_gen_subreg (mode, op0, inner_mode, 0); |
250a60f3 RS |
5221 | else if (GET_MODE_UNIT_BITSIZE (mode) |
5222 | < GET_MODE_UNIT_BITSIZE (inner_mode)) | |
ddb555ed JJ |
5223 | op0 = simplify_gen_unary (FLOAT_TRUNCATE, mode, op0, inner_mode); |
5224 | else | |
5225 | op0 = simplify_gen_unary (FLOAT_EXTEND, mode, op0, inner_mode); | |
5226 | } | |
5227 | else if (FLOAT_MODE_P (mode)) | |
5228 | gcc_unreachable (); | |
5229 | else if (FLOAT_MODE_P (inner_mode)) | |
5230 | { | |
5231 | if (TYPE_UNSIGNED (TREE_TYPE (exp))) | |
5232 | op0 = simplify_gen_unary (UNSIGNED_FIX, mode, op0, inner_mode); | |
5233 | else | |
5234 | op0 = simplify_gen_unary (FIX, mode, op0, inner_mode); | |
5235 | } | |
bb06a2d8 RS |
5236 | else if (GET_MODE_UNIT_PRECISION (mode) |
5237 | == GET_MODE_UNIT_PRECISION (inner_mode)) | |
3403a1a9 | 5238 | op0 = lowpart_subreg (mode, op0, inner_mode); |
bb06a2d8 RS |
5239 | else if (GET_MODE_UNIT_PRECISION (mode) |
5240 | < GET_MODE_UNIT_PRECISION (inner_mode)) | |
5241 | op0 = simplify_gen_unary (TRUNCATE, mode, op0, inner_mode); | |
ddb555ed JJ |
5242 | else if (TYPE_UNSIGNED (TREE_TYPE (exp))) |
5243 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); | |
5244 | else | |
5245 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); | |
5246 | ||
5247 | return op0; | |
5248 | } | |
5249 | ||
6cfa417f JJ |
5250 | /* Ensure INSN_VAR_LOCATION_LOC (insn) doesn't have unbound complexity. |
5251 | Allow 4 levels of rtl nesting for most rtl codes, and if we see anything | |
5252 | deeper than that, create DEBUG_EXPRs and emit DEBUG_INSNs before INSN. */ | |
5253 | ||
5254 | static void | |
b47aae36 | 5255 | avoid_complex_debug_insns (rtx_insn *insn, rtx *exp_p, int depth) |
6cfa417f JJ |
5256 | { |
5257 | rtx exp = *exp_p; | |
5258 | ||
5259 | if (exp == NULL_RTX) | |
5260 | return; | |
5261 | ||
5262 | if ((OBJECT_P (exp) && !MEM_P (exp)) || GET_CODE (exp) == CLOBBER) | |
5263 | return; | |
5264 | ||
5265 | if (depth == 4) | |
5266 | { | |
5267 | /* Create DEBUG_EXPR (and DEBUG_EXPR_DECL). */ | |
5268 | rtx dval = make_debug_expr_from_rtl (exp); | |
5269 | ||
5270 | /* Emit a debug bind insn before INSN. */ | |
5271 | rtx bind = gen_rtx_VAR_LOCATION (GET_MODE (exp), | |
5272 | DEBUG_EXPR_TREE_DECL (dval), exp, | |
5273 | VAR_INIT_STATUS_INITIALIZED); | |
5274 | ||
5275 | emit_debug_insn_before (bind, insn); | |
5276 | *exp_p = dval; | |
5277 | return; | |
5278 | } | |
5279 | ||
5280 | const char *format_ptr = GET_RTX_FORMAT (GET_CODE (exp)); | |
5281 | int i, j; | |
5282 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (exp)); i++) | |
5283 | switch (*format_ptr++) | |
5284 | { | |
5285 | case 'e': | |
5286 | avoid_complex_debug_insns (insn, &XEXP (exp, i), depth + 1); | |
5287 | break; | |
5288 | ||
5289 | case 'E': | |
5290 | case 'V': | |
5291 | for (j = 0; j < XVECLEN (exp, i); j++) | |
5292 | avoid_complex_debug_insns (insn, &XVECEXP (exp, i, j), depth + 1); | |
5293 | break; | |
5294 | ||
5295 | default: | |
5296 | break; | |
5297 | } | |
5298 | } | |
5299 | ||
b5b8b0ac AO |
5300 | /* Expand the _LOCs in debug insns. We run this after expanding all |
5301 | regular insns, so that any variables referenced in the function | |
5302 | will have their DECL_RTLs set. */ | |
5303 | ||
5304 | static void | |
5305 | expand_debug_locations (void) | |
5306 | { | |
b47aae36 DM |
5307 | rtx_insn *insn; |
5308 | rtx_insn *last = get_last_insn (); | |
b5b8b0ac AO |
5309 | int save_strict_alias = flag_strict_aliasing; |
5310 | ||
5311 | /* New alias sets while setting up memory attributes cause | |
5312 | -fcompare-debug failures, even though it doesn't bring about any | |
5313 | codegen changes. */ | |
5314 | flag_strict_aliasing = 0; | |
5315 | ||
5316 | for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) | |
5317 | if (DEBUG_INSN_P (insn)) | |
5318 | { | |
5319 | tree value = (tree)INSN_VAR_LOCATION_LOC (insn); | |
b47aae36 DM |
5320 | rtx val; |
5321 | rtx_insn *prev_insn, *insn2; | |
ef4bddc2 | 5322 | machine_mode mode; |
b5b8b0ac AO |
5323 | |
5324 | if (value == NULL_TREE) | |
5325 | val = NULL_RTX; | |
5326 | else | |
5327 | { | |
ddb555ed JJ |
5328 | if (INSN_VAR_LOCATION_STATUS (insn) |
5329 | == VAR_INIT_STATUS_UNINITIALIZED) | |
5330 | val = expand_debug_source_expr (value); | |
dfde35b3 JJ |
5331 | /* The avoid_deep_ter_for_debug function inserts |
5332 | debug bind stmts after SSA_NAME definition, with the | |
5333 | SSA_NAME as the whole bind location. Disable temporarily | |
5334 | expansion of that SSA_NAME into the DEBUG_EXPR_DECL | |
5335 | being defined in this DEBUG_INSN. */ | |
5336 | else if (deep_ter_debug_map && TREE_CODE (value) == SSA_NAME) | |
5337 | { | |
5338 | tree *slot = deep_ter_debug_map->get (value); | |
5339 | if (slot) | |
5340 | { | |
5341 | if (*slot == INSN_VAR_LOCATION_DECL (insn)) | |
5342 | *slot = NULL_TREE; | |
5343 | else | |
5344 | slot = NULL; | |
5345 | } | |
5346 | val = expand_debug_expr (value); | |
5347 | if (slot) | |
5348 | *slot = INSN_VAR_LOCATION_DECL (insn); | |
5349 | } | |
ddb555ed JJ |
5350 | else |
5351 | val = expand_debug_expr (value); | |
b5b8b0ac AO |
5352 | gcc_assert (last == get_last_insn ()); |
5353 | } | |
5354 | ||
5355 | if (!val) | |
5356 | val = gen_rtx_UNKNOWN_VAR_LOC (); | |
5357 | else | |
5358 | { | |
5359 | mode = GET_MODE (INSN_VAR_LOCATION (insn)); | |
5360 | ||
5361 | gcc_assert (mode == GET_MODE (val) | |
5362 | || (GET_MODE (val) == VOIDmode | |
33ffb5c5 | 5363 | && (CONST_SCALAR_INT_P (val) |
b5b8b0ac | 5364 | || GET_CODE (val) == CONST_FIXED |
b5b8b0ac AO |
5365 | || GET_CODE (val) == LABEL_REF))); |
5366 | } | |
5367 | ||
5368 | INSN_VAR_LOCATION_LOC (insn) = val; | |
6cfa417f JJ |
5369 | prev_insn = PREV_INSN (insn); |
5370 | for (insn2 = insn; insn2 != prev_insn; insn2 = PREV_INSN (insn2)) | |
5371 | avoid_complex_debug_insns (insn2, &INSN_VAR_LOCATION_LOC (insn2), 0); | |
b5b8b0ac AO |
5372 | } |
5373 | ||
5374 | flag_strict_aliasing = save_strict_alias; | |
5375 | } | |
5376 | ||
d2626c0b YR |
5377 | /* Performs swapping operands of commutative operations to expand |
5378 | the expensive one first. */ | |
5379 | ||
5380 | static void | |
5381 | reorder_operands (basic_block bb) | |
5382 | { | |
5383 | unsigned int *lattice; /* Hold cost of each statement. */ | |
5384 | unsigned int i = 0, n = 0; | |
5385 | gimple_stmt_iterator gsi; | |
5386 | gimple_seq stmts; | |
355fe088 | 5387 | gimple *stmt; |
d2626c0b YR |
5388 | bool swap; |
5389 | tree op0, op1; | |
5390 | ssa_op_iter iter; | |
5391 | use_operand_p use_p; | |
355fe088 | 5392 | gimple *def0, *def1; |
d2626c0b YR |
5393 | |
5394 | /* Compute cost of each statement using estimate_num_insns. */ | |
5395 | stmts = bb_seq (bb); | |
5396 | for (gsi = gsi_start (stmts); !gsi_end_p (gsi); gsi_next (&gsi)) | |
5397 | { | |
5398 | stmt = gsi_stmt (gsi); | |
090238ee YR |
5399 | if (!is_gimple_debug (stmt)) |
5400 | gimple_set_uid (stmt, n++); | |
d2626c0b YR |
5401 | } |
5402 | lattice = XNEWVEC (unsigned int, n); | |
5403 | for (gsi = gsi_start (stmts); !gsi_end_p (gsi); gsi_next (&gsi)) | |
5404 | { | |
5405 | unsigned cost; | |
5406 | stmt = gsi_stmt (gsi); | |
090238ee YR |
5407 | if (is_gimple_debug (stmt)) |
5408 | continue; | |
d2626c0b YR |
5409 | cost = estimate_num_insns (stmt, &eni_size_weights); |
5410 | lattice[i] = cost; | |
5411 | FOR_EACH_SSA_USE_OPERAND (use_p, stmt, iter, SSA_OP_USE) | |
5412 | { | |
5413 | tree use = USE_FROM_PTR (use_p); | |
355fe088 | 5414 | gimple *def_stmt; |
d2626c0b YR |
5415 | if (TREE_CODE (use) != SSA_NAME) |
5416 | continue; | |
5417 | def_stmt = get_gimple_for_ssa_name (use); | |
5418 | if (!def_stmt) | |
5419 | continue; | |
5420 | lattice[i] += lattice[gimple_uid (def_stmt)]; | |
5421 | } | |
5422 | i++; | |
5423 | if (!is_gimple_assign (stmt) | |
5424 | || !commutative_tree_code (gimple_assign_rhs_code (stmt))) | |
5425 | continue; | |
5426 | op0 = gimple_op (stmt, 1); | |
5427 | op1 = gimple_op (stmt, 2); | |
5428 | if (TREE_CODE (op0) != SSA_NAME | |
5429 | || TREE_CODE (op1) != SSA_NAME) | |
5430 | continue; | |
5431 | /* Swap operands if the second one is more expensive. */ | |
5432 | def0 = get_gimple_for_ssa_name (op0); | |
d2626c0b YR |
5433 | def1 = get_gimple_for_ssa_name (op1); |
5434 | if (!def1) | |
5435 | continue; | |
5436 | swap = false; | |
68ca4ac9 | 5437 | if (!def0 || lattice[gimple_uid (def1)] > lattice[gimple_uid (def0)]) |
d2626c0b YR |
5438 | swap = true; |
5439 | if (swap) | |
5440 | { | |
5441 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5442 | { | |
5443 | fprintf (dump_file, "Swap operands in stmt:\n"); | |
5444 | print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM); | |
5445 | fprintf (dump_file, "Cost left opnd=%d, right opnd=%d\n", | |
68ca4ac9 | 5446 | def0 ? lattice[gimple_uid (def0)] : 0, |
d2626c0b YR |
5447 | lattice[gimple_uid (def1)]); |
5448 | } | |
5449 | swap_ssa_operands (stmt, gimple_assign_rhs1_ptr (stmt), | |
5450 | gimple_assign_rhs2_ptr (stmt)); | |
5451 | } | |
5452 | } | |
5453 | XDELETE (lattice); | |
5454 | } | |
5455 | ||
242229bb JH |
5456 | /* Expand basic block BB from GIMPLE trees to RTL. */ |
5457 | ||
5458 | static basic_block | |
f3ddd692 | 5459 | expand_gimple_basic_block (basic_block bb, bool disable_tail_calls) |
242229bb | 5460 | { |
726a989a RB |
5461 | gimple_stmt_iterator gsi; |
5462 | gimple_seq stmts; | |
355fe088 | 5463 | gimple *stmt = NULL; |
66e8df53 | 5464 | rtx_note *note; |
b47aae36 | 5465 | rtx_insn *last; |
242229bb | 5466 | edge e; |
628f6a4e | 5467 | edge_iterator ei; |
242229bb JH |
5468 | |
5469 | if (dump_file) | |
726a989a RB |
5470 | fprintf (dump_file, "\n;; Generating RTL for gimple basic block %d\n", |
5471 | bb->index); | |
5472 | ||
5473 | /* Note that since we are now transitioning from GIMPLE to RTL, we | |
5474 | cannot use the gsi_*_bb() routines because they expect the basic | |
5475 | block to be in GIMPLE, instead of RTL. Therefore, we need to | |
5476 | access the BB sequence directly. */ | |
d2626c0b YR |
5477 | if (optimize) |
5478 | reorder_operands (bb); | |
726a989a | 5479 | stmts = bb_seq (bb); |
3e8b732e MM |
5480 | bb->il.gimple.seq = NULL; |
5481 | bb->il.gimple.phi_nodes = NULL; | |
bf08ebeb | 5482 | rtl_profile_for_bb (bb); |
5e2d947c JH |
5483 | init_rtl_bb_info (bb); |
5484 | bb->flags |= BB_RTL; | |
5485 | ||
a9b77cd1 ZD |
5486 | /* Remove the RETURN_EXPR if we may fall though to the exit |
5487 | instead. */ | |
726a989a RB |
5488 | gsi = gsi_last (stmts); |
5489 | if (!gsi_end_p (gsi) | |
5490 | && gimple_code (gsi_stmt (gsi)) == GIMPLE_RETURN) | |
a9b77cd1 | 5491 | { |
538dd0b7 | 5492 | greturn *ret_stmt = as_a <greturn *> (gsi_stmt (gsi)); |
a9b77cd1 ZD |
5493 | |
5494 | gcc_assert (single_succ_p (bb)); | |
fefa31b5 | 5495 | gcc_assert (single_succ (bb) == EXIT_BLOCK_PTR_FOR_FN (cfun)); |
a9b77cd1 | 5496 | |
fefa31b5 | 5497 | if (bb->next_bb == EXIT_BLOCK_PTR_FOR_FN (cfun) |
726a989a | 5498 | && !gimple_return_retval (ret_stmt)) |
a9b77cd1 | 5499 | { |
726a989a | 5500 | gsi_remove (&gsi, false); |
a9b77cd1 ZD |
5501 | single_succ_edge (bb)->flags |= EDGE_FALLTHRU; |
5502 | } | |
5503 | } | |
5504 | ||
726a989a RB |
5505 | gsi = gsi_start (stmts); |
5506 | if (!gsi_end_p (gsi)) | |
8b11009b | 5507 | { |
726a989a RB |
5508 | stmt = gsi_stmt (gsi); |
5509 | if (gimple_code (stmt) != GIMPLE_LABEL) | |
5510 | stmt = NULL; | |
8b11009b | 5511 | } |
242229bb | 5512 | |
134aa83c | 5513 | rtx_code_label **elt = lab_rtx_for_bb->get (bb); |
8b11009b ZD |
5514 | |
5515 | if (stmt || elt) | |
242229bb JH |
5516 | { |
5517 | last = get_last_insn (); | |
5518 | ||
8b11009b ZD |
5519 | if (stmt) |
5520 | { | |
28ed065e | 5521 | expand_gimple_stmt (stmt); |
726a989a | 5522 | gsi_next (&gsi); |
8b11009b ZD |
5523 | } |
5524 | ||
5525 | if (elt) | |
39c8aaa4 | 5526 | emit_label (*elt); |
242229bb | 5527 | |
1130d5e3 | 5528 | BB_HEAD (bb) = NEXT_INSN (last); |
4b4bf941 | 5529 | if (NOTE_P (BB_HEAD (bb))) |
1130d5e3 | 5530 | BB_HEAD (bb) = NEXT_INSN (BB_HEAD (bb)); |
242229bb | 5531 | note = emit_note_after (NOTE_INSN_BASIC_BLOCK, BB_HEAD (bb)); |
b7211528 | 5532 | |
726a989a | 5533 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
242229bb JH |
5534 | } |
5535 | else | |
1130d5e3 | 5536 | BB_HEAD (bb) = note = emit_note (NOTE_INSN_BASIC_BLOCK); |
242229bb JH |
5537 | |
5538 | NOTE_BASIC_BLOCK (note) = bb; | |
5539 | ||
726a989a | 5540 | for (; !gsi_end_p (gsi); gsi_next (&gsi)) |
242229bb | 5541 | { |
cea49550 | 5542 | basic_block new_bb; |
242229bb | 5543 | |
b5b8b0ac | 5544 | stmt = gsi_stmt (gsi); |
2a8e30fb MM |
5545 | |
5546 | /* If this statement is a non-debug one, and we generate debug | |
5547 | insns, then this one might be the last real use of a TERed | |
5548 | SSA_NAME, but where there are still some debug uses further | |
5549 | down. Expanding the current SSA name in such further debug | |
5550 | uses by their RHS might lead to wrong debug info, as coalescing | |
5551 | might make the operands of such RHS be placed into the same | |
5552 | pseudo as something else. Like so: | |
5553 | a_1 = a_0 + 1; // Assume a_1 is TERed and a_0 is dead | |
5554 | use(a_1); | |
5555 | a_2 = ... | |
5556 | #DEBUG ... => a_1 | |
5557 | As a_0 and a_2 don't overlap in lifetime, assume they are coalesced. | |
5558 | If we now would expand a_1 by it's RHS (a_0 + 1) in the debug use, | |
5559 | the write to a_2 would actually have clobbered the place which | |
5560 | formerly held a_0. | |
5561 | ||
5562 | So, instead of that, we recognize the situation, and generate | |
5563 | debug temporaries at the last real use of TERed SSA names: | |
5564 | a_1 = a_0 + 1; | |
5565 | #DEBUG #D1 => a_1 | |
5566 | use(a_1); | |
5567 | a_2 = ... | |
5568 | #DEBUG ... => #D1 | |
5569 | */ | |
5570 | if (MAY_HAVE_DEBUG_INSNS | |
5571 | && SA.values | |
5572 | && !is_gimple_debug (stmt)) | |
5573 | { | |
5574 | ssa_op_iter iter; | |
5575 | tree op; | |
355fe088 | 5576 | gimple *def; |
2a8e30fb | 5577 | |
5368224f | 5578 | location_t sloc = curr_insn_location (); |
2a8e30fb MM |
5579 | |
5580 | /* Look for SSA names that have their last use here (TERed | |
5581 | names always have only one real use). */ | |
5582 | FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_USE) | |
5583 | if ((def = get_gimple_for_ssa_name (op))) | |
5584 | { | |
5585 | imm_use_iterator imm_iter; | |
5586 | use_operand_p use_p; | |
5587 | bool have_debug_uses = false; | |
5588 | ||
5589 | FOR_EACH_IMM_USE_FAST (use_p, imm_iter, op) | |
5590 | { | |
5591 | if (gimple_debug_bind_p (USE_STMT (use_p))) | |
5592 | { | |
5593 | have_debug_uses = true; | |
5594 | break; | |
5595 | } | |
5596 | } | |
5597 | ||
5598 | if (have_debug_uses) | |
5599 | { | |
871dae34 | 5600 | /* OP is a TERed SSA name, with DEF its defining |
2a8e30fb MM |
5601 | statement, and where OP is used in further debug |
5602 | instructions. Generate a debug temporary, and | |
5603 | replace all uses of OP in debug insns with that | |
5604 | temporary. */ | |
355fe088 | 5605 | gimple *debugstmt; |
2a8e30fb MM |
5606 | tree value = gimple_assign_rhs_to_tree (def); |
5607 | tree vexpr = make_node (DEBUG_EXPR_DECL); | |
5608 | rtx val; | |
ef4bddc2 | 5609 | machine_mode mode; |
2a8e30fb | 5610 | |
5368224f | 5611 | set_curr_insn_location (gimple_location (def)); |
2a8e30fb MM |
5612 | |
5613 | DECL_ARTIFICIAL (vexpr) = 1; | |
5614 | TREE_TYPE (vexpr) = TREE_TYPE (value); | |
5615 | if (DECL_P (value)) | |
5616 | mode = DECL_MODE (value); | |
5617 | else | |
5618 | mode = TYPE_MODE (TREE_TYPE (value)); | |
899ca90e | 5619 | SET_DECL_MODE (vexpr, mode); |
2a8e30fb MM |
5620 | |
5621 | val = gen_rtx_VAR_LOCATION | |
5622 | (mode, vexpr, (rtx)value, VAR_INIT_STATUS_INITIALIZED); | |
5623 | ||
e8c6bb74 | 5624 | emit_debug_insn (val); |
2a8e30fb MM |
5625 | |
5626 | FOR_EACH_IMM_USE_STMT (debugstmt, imm_iter, op) | |
5627 | { | |
5628 | if (!gimple_debug_bind_p (debugstmt)) | |
5629 | continue; | |
5630 | ||
5631 | FOR_EACH_IMM_USE_ON_STMT (use_p, imm_iter) | |
5632 | SET_USE (use_p, vexpr); | |
5633 | ||
5634 | update_stmt (debugstmt); | |
5635 | } | |
5636 | } | |
5637 | } | |
5368224f | 5638 | set_curr_insn_location (sloc); |
2a8e30fb MM |
5639 | } |
5640 | ||
a5883ba0 | 5641 | currently_expanding_gimple_stmt = stmt; |
b5b8b0ac | 5642 | |
242229bb JH |
5643 | /* Expand this statement, then evaluate the resulting RTL and |
5644 | fixup the CFG accordingly. */ | |
726a989a | 5645 | if (gimple_code (stmt) == GIMPLE_COND) |
cea49550 | 5646 | { |
538dd0b7 | 5647 | new_bb = expand_gimple_cond (bb, as_a <gcond *> (stmt)); |
cea49550 RH |
5648 | if (new_bb) |
5649 | return new_bb; | |
5650 | } | |
b5b8b0ac AO |
5651 | else if (gimple_debug_bind_p (stmt)) |
5652 | { | |
5368224f | 5653 | location_t sloc = curr_insn_location (); |
b5b8b0ac AO |
5654 | gimple_stmt_iterator nsi = gsi; |
5655 | ||
5656 | for (;;) | |
5657 | { | |
5658 | tree var = gimple_debug_bind_get_var (stmt); | |
5659 | tree value; | |
5660 | rtx val; | |
ef4bddc2 | 5661 | machine_mode mode; |
b5b8b0ac | 5662 | |
ec8c1492 JJ |
5663 | if (TREE_CODE (var) != DEBUG_EXPR_DECL |
5664 | && TREE_CODE (var) != LABEL_DECL | |
5665 | && !target_for_debug_bind (var)) | |
5666 | goto delink_debug_stmt; | |
5667 | ||
b5b8b0ac AO |
5668 | if (gimple_debug_bind_has_value_p (stmt)) |
5669 | value = gimple_debug_bind_get_value (stmt); | |
5670 | else | |
5671 | value = NULL_TREE; | |
5672 | ||
5673 | last = get_last_insn (); | |
5674 | ||
5368224f | 5675 | set_curr_insn_location (gimple_location (stmt)); |
b5b8b0ac AO |
5676 | |
5677 | if (DECL_P (var)) | |
5678 | mode = DECL_MODE (var); | |
5679 | else | |
5680 | mode = TYPE_MODE (TREE_TYPE (var)); | |
5681 | ||
5682 | val = gen_rtx_VAR_LOCATION | |
5683 | (mode, var, (rtx)value, VAR_INIT_STATUS_INITIALIZED); | |
5684 | ||
e16b6fd0 | 5685 | emit_debug_insn (val); |
b5b8b0ac AO |
5686 | |
5687 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5688 | { | |
5689 | /* We can't dump the insn with a TREE where an RTX | |
5690 | is expected. */ | |
e8c6bb74 | 5691 | PAT_VAR_LOCATION_LOC (val) = const0_rtx; |
b5b8b0ac | 5692 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
e8c6bb74 | 5693 | PAT_VAR_LOCATION_LOC (val) = (rtx)value; |
b5b8b0ac AO |
5694 | } |
5695 | ||
ec8c1492 | 5696 | delink_debug_stmt: |
2a8e30fb MM |
5697 | /* In order not to generate too many debug temporaries, |
5698 | we delink all uses of debug statements we already expanded. | |
5699 | Therefore debug statements between definition and real | |
5700 | use of TERed SSA names will continue to use the SSA name, | |
5701 | and not be replaced with debug temps. */ | |
5702 | delink_stmt_imm_use (stmt); | |
5703 | ||
b5b8b0ac AO |
5704 | gsi = nsi; |
5705 | gsi_next (&nsi); | |
5706 | if (gsi_end_p (nsi)) | |
5707 | break; | |
5708 | stmt = gsi_stmt (nsi); | |
5709 | if (!gimple_debug_bind_p (stmt)) | |
5710 | break; | |
5711 | } | |
5712 | ||
5368224f | 5713 | set_curr_insn_location (sloc); |
ddb555ed JJ |
5714 | } |
5715 | else if (gimple_debug_source_bind_p (stmt)) | |
5716 | { | |
5368224f | 5717 | location_t sloc = curr_insn_location (); |
ddb555ed JJ |
5718 | tree var = gimple_debug_source_bind_get_var (stmt); |
5719 | tree value = gimple_debug_source_bind_get_value (stmt); | |
5720 | rtx val; | |
ef4bddc2 | 5721 | machine_mode mode; |
ddb555ed JJ |
5722 | |
5723 | last = get_last_insn (); | |
5724 | ||
5368224f | 5725 | set_curr_insn_location (gimple_location (stmt)); |
ddb555ed JJ |
5726 | |
5727 | mode = DECL_MODE (var); | |
5728 | ||
5729 | val = gen_rtx_VAR_LOCATION (mode, var, (rtx)value, | |
5730 | VAR_INIT_STATUS_UNINITIALIZED); | |
5731 | ||
5732 | emit_debug_insn (val); | |
5733 | ||
5734 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5735 | { | |
5736 | /* We can't dump the insn with a TREE where an RTX | |
5737 | is expected. */ | |
5738 | PAT_VAR_LOCATION_LOC (val) = const0_rtx; | |
5739 | maybe_dump_rtl_for_gimple_stmt (stmt, last); | |
5740 | PAT_VAR_LOCATION_LOC (val) = (rtx)value; | |
5741 | } | |
5742 | ||
5368224f | 5743 | set_curr_insn_location (sloc); |
b5b8b0ac | 5744 | } |
80c7a9eb | 5745 | else |
242229bb | 5746 | { |
538dd0b7 DM |
5747 | gcall *call_stmt = dyn_cast <gcall *> (stmt); |
5748 | if (call_stmt | |
5749 | && gimple_call_tail_p (call_stmt) | |
f3ddd692 | 5750 | && disable_tail_calls) |
538dd0b7 | 5751 | gimple_call_set_tail (call_stmt, false); |
f3ddd692 | 5752 | |
538dd0b7 | 5753 | if (call_stmt && gimple_call_tail_p (call_stmt)) |
cea49550 RH |
5754 | { |
5755 | bool can_fallthru; | |
538dd0b7 | 5756 | new_bb = expand_gimple_tailcall (bb, call_stmt, &can_fallthru); |
cea49550 RH |
5757 | if (new_bb) |
5758 | { | |
5759 | if (can_fallthru) | |
5760 | bb = new_bb; | |
5761 | else | |
5762 | return new_bb; | |
5763 | } | |
5764 | } | |
4d7a65ea | 5765 | else |
b7211528 | 5766 | { |
4e3825db | 5767 | def_operand_p def_p; |
4e3825db MM |
5768 | def_p = SINGLE_SSA_DEF_OPERAND (stmt, SSA_OP_DEF); |
5769 | ||
5770 | if (def_p != NULL) | |
5771 | { | |
5772 | /* Ignore this stmt if it is in the list of | |
5773 | replaceable expressions. */ | |
5774 | if (SA.values | |
b8698a0f | 5775 | && bitmap_bit_p (SA.values, |
e97809c6 | 5776 | SSA_NAME_VERSION (DEF_FROM_PTR (def_p)))) |
4e3825db MM |
5777 | continue; |
5778 | } | |
28ed065e | 5779 | last = expand_gimple_stmt (stmt); |
726a989a | 5780 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
b7211528 | 5781 | } |
242229bb JH |
5782 | } |
5783 | } | |
5784 | ||
a5883ba0 MM |
5785 | currently_expanding_gimple_stmt = NULL; |
5786 | ||
7241571e | 5787 | /* Expand implicit goto and convert goto_locus. */ |
a9b77cd1 ZD |
5788 | FOR_EACH_EDGE (e, ei, bb->succs) |
5789 | { | |
2f13f2de | 5790 | if (e->goto_locus != UNKNOWN_LOCATION) |
5368224f | 5791 | set_curr_insn_location (e->goto_locus); |
7241571e JJ |
5792 | if ((e->flags & EDGE_FALLTHRU) && e->dest != bb->next_bb) |
5793 | { | |
5794 | emit_jump (label_rtx_for_bb (e->dest)); | |
5795 | e->flags &= ~EDGE_FALLTHRU; | |
5796 | } | |
a9b77cd1 ZD |
5797 | } |
5798 | ||
ae761c45 AH |
5799 | /* Expanded RTL can create a jump in the last instruction of block. |
5800 | This later might be assumed to be a jump to successor and break edge insertion. | |
5801 | We need to insert dummy move to prevent this. PR41440. */ | |
5802 | if (single_succ_p (bb) | |
5803 | && (single_succ_edge (bb)->flags & EDGE_FALLTHRU) | |
5804 | && (last = get_last_insn ()) | |
4dbebf6f AO |
5805 | && (JUMP_P (last) |
5806 | || (DEBUG_INSN_P (last) | |
5807 | && JUMP_P (prev_nondebug_insn (last))))) | |
ae761c45 AH |
5808 | { |
5809 | rtx dummy = gen_reg_rtx (SImode); | |
5810 | emit_insn_after_noloc (gen_move_insn (dummy, dummy), last, NULL); | |
5811 | } | |
5812 | ||
242229bb JH |
5813 | do_pending_stack_adjust (); |
5814 | ||
3f117656 | 5815 | /* Find the block tail. The last insn in the block is the insn |
242229bb JH |
5816 | before a barrier and/or table jump insn. */ |
5817 | last = get_last_insn (); | |
4b4bf941 | 5818 | if (BARRIER_P (last)) |
242229bb JH |
5819 | last = PREV_INSN (last); |
5820 | if (JUMP_TABLE_DATA_P (last)) | |
5821 | last = PREV_INSN (PREV_INSN (last)); | |
1130d5e3 | 5822 | BB_END (bb) = last; |
caf93cb0 | 5823 | |
242229bb | 5824 | update_bb_for_insn (bb); |
80c7a9eb | 5825 | |
242229bb JH |
5826 | return bb; |
5827 | } | |
5828 | ||
5829 | ||
5830 | /* Create a basic block for initialization code. */ | |
5831 | ||
5832 | static basic_block | |
5833 | construct_init_block (void) | |
5834 | { | |
5835 | basic_block init_block, first_block; | |
fd44f634 JH |
5836 | edge e = NULL; |
5837 | int flags; | |
275a4187 | 5838 | |
fd44f634 | 5839 | /* Multiple entry points not supported yet. */ |
fefa31b5 DM |
5840 | gcc_assert (EDGE_COUNT (ENTRY_BLOCK_PTR_FOR_FN (cfun)->succs) == 1); |
5841 | init_rtl_bb_info (ENTRY_BLOCK_PTR_FOR_FN (cfun)); | |
5842 | init_rtl_bb_info (EXIT_BLOCK_PTR_FOR_FN (cfun)); | |
5843 | ENTRY_BLOCK_PTR_FOR_FN (cfun)->flags |= BB_RTL; | |
5844 | EXIT_BLOCK_PTR_FOR_FN (cfun)->flags |= BB_RTL; | |
242229bb | 5845 | |
fefa31b5 | 5846 | e = EDGE_SUCC (ENTRY_BLOCK_PTR_FOR_FN (cfun), 0); |
275a4187 | 5847 | |
fd44f634 JH |
5848 | /* When entry edge points to first basic block, we don't need jump, |
5849 | otherwise we have to jump into proper target. */ | |
fefa31b5 | 5850 | if (e && e->dest != ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb) |
fd44f634 | 5851 | { |
726a989a | 5852 | tree label = gimple_block_label (e->dest); |
fd44f634 | 5853 | |
1476d1bd | 5854 | emit_jump (jump_target_rtx (label)); |
fd44f634 | 5855 | flags = 0; |
275a4187 | 5856 | } |
fd44f634 JH |
5857 | else |
5858 | flags = EDGE_FALLTHRU; | |
242229bb JH |
5859 | |
5860 | init_block = create_basic_block (NEXT_INSN (get_insns ()), | |
5861 | get_last_insn (), | |
fefa31b5 DM |
5862 | ENTRY_BLOCK_PTR_FOR_FN (cfun)); |
5863 | init_block->frequency = ENTRY_BLOCK_PTR_FOR_FN (cfun)->frequency; | |
5864 | init_block->count = ENTRY_BLOCK_PTR_FOR_FN (cfun)->count; | |
726338f4 | 5865 | add_bb_to_loop (init_block, ENTRY_BLOCK_PTR_FOR_FN (cfun)->loop_father); |
242229bb JH |
5866 | if (e) |
5867 | { | |
5868 | first_block = e->dest; | |
5869 | redirect_edge_succ (e, init_block); | |
357067f2 | 5870 | e = make_single_succ_edge (init_block, first_block, flags); |
242229bb JH |
5871 | } |
5872 | else | |
357067f2 JH |
5873 | e = make_single_succ_edge (init_block, EXIT_BLOCK_PTR_FOR_FN (cfun), |
5874 | EDGE_FALLTHRU); | |
242229bb JH |
5875 | |
5876 | update_bb_for_insn (init_block); | |
5877 | return init_block; | |
5878 | } | |
5879 | ||
55e092c4 JH |
5880 | /* For each lexical block, set BLOCK_NUMBER to the depth at which it is |
5881 | found in the block tree. */ | |
5882 | ||
5883 | static void | |
5884 | set_block_levels (tree block, int level) | |
5885 | { | |
5886 | while (block) | |
5887 | { | |
5888 | BLOCK_NUMBER (block) = level; | |
5889 | set_block_levels (BLOCK_SUBBLOCKS (block), level + 1); | |
5890 | block = BLOCK_CHAIN (block); | |
5891 | } | |
5892 | } | |
242229bb JH |
5893 | |
5894 | /* Create a block containing landing pads and similar stuff. */ | |
5895 | ||
5896 | static void | |
5897 | construct_exit_block (void) | |
5898 | { | |
b47aae36 DM |
5899 | rtx_insn *head = get_last_insn (); |
5900 | rtx_insn *end; | |
242229bb | 5901 | basic_block exit_block; |
628f6a4e BE |
5902 | edge e, e2; |
5903 | unsigned ix; | |
5904 | edge_iterator ei; | |
79c7fda6 | 5905 | basic_block prev_bb = EXIT_BLOCK_PTR_FOR_FN (cfun)->prev_bb; |
b47aae36 | 5906 | rtx_insn *orig_end = BB_END (prev_bb); |
242229bb | 5907 | |
fefa31b5 | 5908 | rtl_profile_for_bb (EXIT_BLOCK_PTR_FOR_FN (cfun)); |
bf08ebeb | 5909 | |
caf93cb0 | 5910 | /* Make sure the locus is set to the end of the function, so that |
242229bb | 5911 | epilogue line numbers and warnings are set properly. */ |
2f13f2de | 5912 | if (LOCATION_LOCUS (cfun->function_end_locus) != UNKNOWN_LOCATION) |
242229bb JH |
5913 | input_location = cfun->function_end_locus; |
5914 | ||
242229bb JH |
5915 | /* Generate rtl for function exit. */ |
5916 | expand_function_end (); | |
5917 | ||
5918 | end = get_last_insn (); | |
5919 | if (head == end) | |
5920 | return; | |
79c7fda6 JJ |
5921 | /* While emitting the function end we could move end of the last basic |
5922 | block. */ | |
1130d5e3 | 5923 | BB_END (prev_bb) = orig_end; |
4b4bf941 | 5924 | while (NEXT_INSN (head) && NOTE_P (NEXT_INSN (head))) |
242229bb | 5925 | head = NEXT_INSN (head); |
79c7fda6 JJ |
5926 | /* But make sure exit_block starts with RETURN_LABEL, otherwise the |
5927 | bb frequency counting will be confused. Any instructions before that | |
5928 | label are emitted for the case where PREV_BB falls through into the | |
5929 | exit block, so append those instructions to prev_bb in that case. */ | |
5930 | if (NEXT_INSN (head) != return_label) | |
5931 | { | |
5932 | while (NEXT_INSN (head) != return_label) | |
5933 | { | |
5934 | if (!NOTE_P (NEXT_INSN (head))) | |
1130d5e3 | 5935 | BB_END (prev_bb) = NEXT_INSN (head); |
79c7fda6 JJ |
5936 | head = NEXT_INSN (head); |
5937 | } | |
5938 | } | |
5939 | exit_block = create_basic_block (NEXT_INSN (head), end, prev_bb); | |
fefa31b5 DM |
5940 | exit_block->frequency = EXIT_BLOCK_PTR_FOR_FN (cfun)->frequency; |
5941 | exit_block->count = EXIT_BLOCK_PTR_FOR_FN (cfun)->count; | |
726338f4 | 5942 | add_bb_to_loop (exit_block, EXIT_BLOCK_PTR_FOR_FN (cfun)->loop_father); |
628f6a4e BE |
5943 | |
5944 | ix = 0; | |
fefa31b5 | 5945 | while (ix < EDGE_COUNT (EXIT_BLOCK_PTR_FOR_FN (cfun)->preds)) |
242229bb | 5946 | { |
fefa31b5 | 5947 | e = EDGE_PRED (EXIT_BLOCK_PTR_FOR_FN (cfun), ix); |
242229bb | 5948 | if (!(e->flags & EDGE_ABNORMAL)) |
628f6a4e BE |
5949 | redirect_edge_succ (e, exit_block); |
5950 | else | |
5951 | ix++; | |
242229bb | 5952 | } |
628f6a4e | 5953 | |
357067f2 JH |
5954 | e = make_single_succ_edge (exit_block, EXIT_BLOCK_PTR_FOR_FN (cfun), |
5955 | EDGE_FALLTHRU); | |
fefa31b5 | 5956 | FOR_EACH_EDGE (e2, ei, EXIT_BLOCK_PTR_FOR_FN (cfun)->preds) |
242229bb JH |
5957 | if (e2 != e) |
5958 | { | |
ef30ab83 | 5959 | exit_block->count -= e2->count (); |
242229bb JH |
5960 | exit_block->frequency -= EDGE_FREQUENCY (e2); |
5961 | } | |
242229bb JH |
5962 | if (exit_block->frequency < 0) |
5963 | exit_block->frequency = 0; | |
5964 | update_bb_for_insn (exit_block); | |
5965 | } | |
5966 | ||
c22cacf3 | 5967 | /* Helper function for discover_nonconstant_array_refs. |
a1b23b2f UW |
5968 | Look for ARRAY_REF nodes with non-constant indexes and mark them |
5969 | addressable. */ | |
5970 | ||
5971 | static tree | |
5972 | discover_nonconstant_array_refs_r (tree * tp, int *walk_subtrees, | |
5973 | void *data ATTRIBUTE_UNUSED) | |
5974 | { | |
5975 | tree t = *tp; | |
5976 | ||
5977 | if (IS_TYPE_OR_DECL_P (t)) | |
5978 | *walk_subtrees = 0; | |
5979 | else if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5980 | { | |
5981 | while (((TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5982 | && is_gimple_min_invariant (TREE_OPERAND (t, 1)) | |
5983 | && (!TREE_OPERAND (t, 2) | |
5984 | || is_gimple_min_invariant (TREE_OPERAND (t, 2)))) | |
5985 | || (TREE_CODE (t) == COMPONENT_REF | |
5986 | && (!TREE_OPERAND (t,2) | |
5987 | || is_gimple_min_invariant (TREE_OPERAND (t, 2)))) | |
5988 | || TREE_CODE (t) == BIT_FIELD_REF | |
5989 | || TREE_CODE (t) == REALPART_EXPR | |
5990 | || TREE_CODE (t) == IMAGPART_EXPR | |
5991 | || TREE_CODE (t) == VIEW_CONVERT_EXPR | |
1043771b | 5992 | || CONVERT_EXPR_P (t)) |
a1b23b2f UW |
5993 | t = TREE_OPERAND (t, 0); |
5994 | ||
5995 | if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5996 | { | |
5997 | t = get_base_address (t); | |
6f11d690 RG |
5998 | if (t && DECL_P (t) |
5999 | && DECL_MODE (t) != BLKmode) | |
a1b23b2f UW |
6000 | TREE_ADDRESSABLE (t) = 1; |
6001 | } | |
6002 | ||
6003 | *walk_subtrees = 0; | |
6004 | } | |
6005 | ||
6006 | return NULL_TREE; | |
6007 | } | |
6008 | ||
6009 | /* RTL expansion is not able to compile array references with variable | |
6010 | offsets for arrays stored in single register. Discover such | |
6011 | expressions and mark variables as addressable to avoid this | |
6012 | scenario. */ | |
6013 | ||
6014 | static void | |
6015 | discover_nonconstant_array_refs (void) | |
6016 | { | |
6017 | basic_block bb; | |
726a989a | 6018 | gimple_stmt_iterator gsi; |
a1b23b2f | 6019 | |
11cd3bed | 6020 | FOR_EACH_BB_FN (bb, cfun) |
726a989a RB |
6021 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
6022 | { | |
355fe088 | 6023 | gimple *stmt = gsi_stmt (gsi); |
aa847cc8 JJ |
6024 | if (!is_gimple_debug (stmt)) |
6025 | walk_gimple_op (stmt, discover_nonconstant_array_refs_r, NULL); | |
726a989a | 6026 | } |
a1b23b2f UW |
6027 | } |
6028 | ||
2e3f842f L |
6029 | /* This function sets crtl->args.internal_arg_pointer to a virtual |
6030 | register if DRAP is needed. Local register allocator will replace | |
6031 | virtual_incoming_args_rtx with the virtual register. */ | |
6032 | ||
6033 | static void | |
6034 | expand_stack_alignment (void) | |
6035 | { | |
6036 | rtx drap_rtx; | |
e939805b | 6037 | unsigned int preferred_stack_boundary; |
2e3f842f L |
6038 | |
6039 | if (! SUPPORTS_STACK_ALIGNMENT) | |
6040 | return; | |
b8698a0f | 6041 | |
2e3f842f L |
6042 | if (cfun->calls_alloca |
6043 | || cfun->has_nonlocal_label | |
6044 | || crtl->has_nonlocal_goto) | |
6045 | crtl->need_drap = true; | |
6046 | ||
890b9b96 L |
6047 | /* Call update_stack_boundary here again to update incoming stack |
6048 | boundary. It may set incoming stack alignment to a different | |
6049 | value after RTL expansion. TARGET_FUNCTION_OK_FOR_SIBCALL may | |
6050 | use the minimum incoming stack alignment to check if it is OK | |
6051 | to perform sibcall optimization since sibcall optimization will | |
6052 | only align the outgoing stack to incoming stack boundary. */ | |
6053 | if (targetm.calls.update_stack_boundary) | |
6054 | targetm.calls.update_stack_boundary (); | |
6055 | ||
6056 | /* The incoming stack frame has to be aligned at least at | |
6057 | parm_stack_boundary. */ | |
6058 | gcc_assert (crtl->parm_stack_boundary <= INCOMING_STACK_BOUNDARY); | |
2e3f842f | 6059 | |
2e3f842f L |
6060 | /* Update crtl->stack_alignment_estimated and use it later to align |
6061 | stack. We check PREFERRED_STACK_BOUNDARY if there may be non-call | |
6062 | exceptions since callgraph doesn't collect incoming stack alignment | |
6063 | in this case. */ | |
8f4f502f | 6064 | if (cfun->can_throw_non_call_exceptions |
2e3f842f L |
6065 | && PREFERRED_STACK_BOUNDARY > crtl->preferred_stack_boundary) |
6066 | preferred_stack_boundary = PREFERRED_STACK_BOUNDARY; | |
6067 | else | |
6068 | preferred_stack_boundary = crtl->preferred_stack_boundary; | |
6069 | if (preferred_stack_boundary > crtl->stack_alignment_estimated) | |
6070 | crtl->stack_alignment_estimated = preferred_stack_boundary; | |
6071 | if (preferred_stack_boundary > crtl->stack_alignment_needed) | |
6072 | crtl->stack_alignment_needed = preferred_stack_boundary; | |
6073 | ||
890b9b96 L |
6074 | gcc_assert (crtl->stack_alignment_needed |
6075 | <= crtl->stack_alignment_estimated); | |
6076 | ||
2e3f842f | 6077 | crtl->stack_realign_needed |
e939805b | 6078 | = INCOMING_STACK_BOUNDARY < crtl->stack_alignment_estimated; |
d2d93c32 | 6079 | crtl->stack_realign_tried = crtl->stack_realign_needed; |
2e3f842f L |
6080 | |
6081 | crtl->stack_realign_processed = true; | |
6082 | ||
6083 | /* Target has to redefine TARGET_GET_DRAP_RTX to support stack | |
6084 | alignment. */ | |
6085 | gcc_assert (targetm.calls.get_drap_rtx != NULL); | |
b8698a0f | 6086 | drap_rtx = targetm.calls.get_drap_rtx (); |
2e3f842f | 6087 | |
d015f7cc L |
6088 | /* stack_realign_drap and drap_rtx must match. */ |
6089 | gcc_assert ((stack_realign_drap != 0) == (drap_rtx != NULL)); | |
6090 | ||
2e3f842f L |
6091 | /* Do nothing if NULL is returned, which means DRAP is not needed. */ |
6092 | if (NULL != drap_rtx) | |
6093 | { | |
6094 | crtl->args.internal_arg_pointer = drap_rtx; | |
6095 | ||
6096 | /* Call fixup_tail_calls to clean up REG_EQUIV note if DRAP is | |
6097 | needed. */ | |
6098 | fixup_tail_calls (); | |
6099 | } | |
6100 | } | |
862d0b35 DN |
6101 | \f |
6102 | ||
6103 | static void | |
6104 | expand_main_function (void) | |
6105 | { | |
6106 | #if (defined(INVOKE__main) \ | |
6107 | || (!defined(HAS_INIT_SECTION) \ | |
6108 | && !defined(INIT_SECTION_ASM_OP) \ | |
6109 | && !defined(INIT_ARRAY_SECTION_ASM_OP))) | |
db69559b | 6110 | emit_library_call (init_one_libfunc (NAME__MAIN), LCT_NORMAL, VOIDmode); |
862d0b35 DN |
6111 | #endif |
6112 | } | |
6113 | \f | |
6114 | ||
6115 | /* Expand code to initialize the stack_protect_guard. This is invoked at | |
6116 | the beginning of a function to be protected. */ | |
6117 | ||
862d0b35 DN |
6118 | static void |
6119 | stack_protect_prologue (void) | |
6120 | { | |
6121 | tree guard_decl = targetm.stack_protect_guard (); | |
6122 | rtx x, y; | |
6123 | ||
6124 | x = expand_normal (crtl->stack_protect_guard); | |
1202f33e JJ |
6125 | if (guard_decl) |
6126 | y = expand_normal (guard_decl); | |
6127 | else | |
6128 | y = const0_rtx; | |
862d0b35 DN |
6129 | |
6130 | /* Allow the target to copy from Y to X without leaking Y into a | |
6131 | register. */ | |
c65aa042 RS |
6132 | if (targetm.have_stack_protect_set ()) |
6133 | if (rtx_insn *insn = targetm.gen_stack_protect_set (x, y)) | |
6134 | { | |
6135 | emit_insn (insn); | |
6136 | return; | |
6137 | } | |
862d0b35 DN |
6138 | |
6139 | /* Otherwise do a straight move. */ | |
6140 | emit_move_insn (x, y); | |
6141 | } | |
2e3f842f | 6142 | |
242229bb JH |
6143 | /* Translate the intermediate representation contained in the CFG |
6144 | from GIMPLE trees to RTL. | |
6145 | ||
6146 | We do conversion per basic block and preserve/update the tree CFG. | |
6147 | This implies we have to do some magic as the CFG can simultaneously | |
6148 | consist of basic blocks containing RTL and GIMPLE trees. This can | |
61ada8ae | 6149 | confuse the CFG hooks, so be careful to not manipulate CFG during |
242229bb JH |
6150 | the expansion. */ |
6151 | ||
be55bfe6 TS |
6152 | namespace { |
6153 | ||
6154 | const pass_data pass_data_expand = | |
6155 | { | |
6156 | RTL_PASS, /* type */ | |
6157 | "expand", /* name */ | |
6158 | OPTGROUP_NONE, /* optinfo_flags */ | |
be55bfe6 TS |
6159 | TV_EXPAND, /* tv_id */ |
6160 | ( PROP_ssa | PROP_gimple_leh | PROP_cfg | |
6161 | | PROP_gimple_lcx | |
f8e89441 TV |
6162 | | PROP_gimple_lvec |
6163 | | PROP_gimple_lva), /* properties_required */ | |
be55bfe6 TS |
6164 | PROP_rtl, /* properties_provided */ |
6165 | ( PROP_ssa | PROP_trees ), /* properties_destroyed */ | |
3bea341f | 6166 | 0, /* todo_flags_start */ |
be55bfe6 TS |
6167 | 0, /* todo_flags_finish */ |
6168 | }; | |
6169 | ||
6170 | class pass_expand : public rtl_opt_pass | |
6171 | { | |
6172 | public: | |
6173 | pass_expand (gcc::context *ctxt) | |
6174 | : rtl_opt_pass (pass_data_expand, ctxt) | |
6175 | {} | |
6176 | ||
6177 | /* opt_pass methods: */ | |
6178 | virtual unsigned int execute (function *); | |
6179 | ||
6180 | }; // class pass_expand | |
6181 | ||
6182 | unsigned int | |
6183 | pass_expand::execute (function *fun) | |
242229bb JH |
6184 | { |
6185 | basic_block bb, init_block; | |
0ef90296 ZD |
6186 | edge_iterator ei; |
6187 | edge e; | |
b47aae36 | 6188 | rtx_insn *var_seq, *var_ret_seq; |
4e3825db MM |
6189 | unsigned i; |
6190 | ||
f029db69 | 6191 | timevar_push (TV_OUT_OF_SSA); |
4e3825db | 6192 | rewrite_out_of_ssa (&SA); |
f029db69 | 6193 | timevar_pop (TV_OUT_OF_SSA); |
c302207e | 6194 | SA.partition_to_pseudo = XCNEWVEC (rtx, SA.map->num_partitions); |
242229bb | 6195 | |
dfde35b3 JJ |
6196 | if (MAY_HAVE_DEBUG_STMTS && flag_tree_ter) |
6197 | { | |
6198 | gimple_stmt_iterator gsi; | |
6199 | FOR_EACH_BB_FN (bb, cfun) | |
6200 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
6201 | if (gimple_debug_bind_p (gsi_stmt (gsi))) | |
6202 | avoid_deep_ter_for_debug (gsi_stmt (gsi), 0); | |
6203 | } | |
6204 | ||
be147e84 RG |
6205 | /* Make sure all values used by the optimization passes have sane |
6206 | defaults. */ | |
6207 | reg_renumber = 0; | |
6208 | ||
4586b4ca SB |
6209 | /* Some backends want to know that we are expanding to RTL. */ |
6210 | currently_expanding_to_rtl = 1; | |
cd7d9fd7 RG |
6211 | /* Dominators are not kept up-to-date as we may create new basic-blocks. */ |
6212 | free_dominance_info (CDI_DOMINATORS); | |
4586b4ca | 6213 | |
be55bfe6 | 6214 | rtl_profile_for_bb (ENTRY_BLOCK_PTR_FOR_FN (fun)); |
bf08ebeb | 6215 | |
d5e254e1 IE |
6216 | if (chkp_function_instrumented_p (current_function_decl)) |
6217 | chkp_reset_rtl_bounds (); | |
6218 | ||
5368224f | 6219 | insn_locations_init (); |
fe8a7779 | 6220 | if (!DECL_IS_BUILTIN (current_function_decl)) |
1751ecd6 AH |
6221 | { |
6222 | /* Eventually, all FEs should explicitly set function_start_locus. */ | |
be55bfe6 TS |
6223 | if (LOCATION_LOCUS (fun->function_start_locus) == UNKNOWN_LOCATION) |
6224 | set_curr_insn_location | |
6225 | (DECL_SOURCE_LOCATION (current_function_decl)); | |
1751ecd6 | 6226 | else |
be55bfe6 | 6227 | set_curr_insn_location (fun->function_start_locus); |
1751ecd6 | 6228 | } |
9ff70652 | 6229 | else |
5368224f DC |
6230 | set_curr_insn_location (UNKNOWN_LOCATION); |
6231 | prologue_location = curr_insn_location (); | |
55e092c4 | 6232 | |
2b21299c JJ |
6233 | #ifdef INSN_SCHEDULING |
6234 | init_sched_attrs (); | |
6235 | #endif | |
6236 | ||
55e092c4 JH |
6237 | /* Make sure first insn is a note even if we don't want linenums. |
6238 | This makes sure the first insn will never be deleted. | |
6239 | Also, final expects a note to appear there. */ | |
6240 | emit_note (NOTE_INSN_DELETED); | |
6429e3be | 6241 | |
a1b23b2f UW |
6242 | /* Mark arrays indexed with non-constant indices with TREE_ADDRESSABLE. */ |
6243 | discover_nonconstant_array_refs (); | |
6244 | ||
e41b2a33 | 6245 | targetm.expand_to_rtl_hook (); |
8194c537 | 6246 | crtl->init_stack_alignment (); |
be55bfe6 | 6247 | fun->cfg->max_jumptable_ents = 0; |
cb91fab0 | 6248 | |
ae9fd6b7 JH |
6249 | /* Resovle the function section. Some targets, like ARM EABI rely on knowledge |
6250 | of the function section at exapnsion time to predict distance of calls. */ | |
6251 | resolve_unique_section (current_function_decl, 0, flag_function_sections); | |
6252 | ||
727a31fa | 6253 | /* Expand the variables recorded during gimple lowering. */ |
f029db69 | 6254 | timevar_push (TV_VAR_EXPAND); |
3a42502d RH |
6255 | start_sequence (); |
6256 | ||
f3ddd692 | 6257 | var_ret_seq = expand_used_vars (); |
3a42502d RH |
6258 | |
6259 | var_seq = get_insns (); | |
6260 | end_sequence (); | |
f029db69 | 6261 | timevar_pop (TV_VAR_EXPAND); |
242229bb | 6262 | |
7d69de61 RH |
6263 | /* Honor stack protection warnings. */ |
6264 | if (warn_stack_protect) | |
6265 | { | |
be55bfe6 | 6266 | if (fun->calls_alloca) |
b8698a0f | 6267 | warning (OPT_Wstack_protector, |
3b123595 | 6268 | "stack protector not protecting local variables: " |
be55bfe6 | 6269 | "variable length buffer"); |
cb91fab0 | 6270 | if (has_short_buffer && !crtl->stack_protect_guard) |
b8698a0f | 6271 | warning (OPT_Wstack_protector, |
3b123595 | 6272 | "stack protector not protecting function: " |
be55bfe6 | 6273 | "all local arrays are less than %d bytes long", |
7d69de61 RH |
6274 | (int) PARAM_VALUE (PARAM_SSP_BUFFER_SIZE)); |
6275 | } | |
6276 | ||
242229bb | 6277 | /* Set up parameters and prepare for return, for the function. */ |
b79c5284 | 6278 | expand_function_start (current_function_decl); |
242229bb | 6279 | |
3a42502d RH |
6280 | /* If we emitted any instructions for setting up the variables, |
6281 | emit them before the FUNCTION_START note. */ | |
6282 | if (var_seq) | |
6283 | { | |
6284 | emit_insn_before (var_seq, parm_birth_insn); | |
6285 | ||
6286 | /* In expand_function_end we'll insert the alloca save/restore | |
6287 | before parm_birth_insn. We've just insertted an alloca call. | |
6288 | Adjust the pointer to match. */ | |
6289 | parm_birth_insn = var_seq; | |
6290 | } | |
6291 | ||
f11a7b6d AO |
6292 | /* Now propagate the RTL assignment of each partition to the |
6293 | underlying var of each SSA_NAME. */ | |
46aa019a KV |
6294 | tree name; |
6295 | ||
6296 | FOR_EACH_SSA_NAME (i, name, cfun) | |
f11a7b6d | 6297 | { |
46aa019a KV |
6298 | /* We might have generated new SSA names in |
6299 | update_alias_info_with_stack_vars. They will have a NULL | |
6300 | defining statements, and won't be part of the partitioning, | |
6301 | so ignore those. */ | |
6302 | if (!SSA_NAME_DEF_STMT (name)) | |
f11a7b6d AO |
6303 | continue; |
6304 | ||
6305 | adjust_one_expanded_partition_var (name); | |
6306 | } | |
6307 | ||
6308 | /* Clean up RTL of variables that straddle across multiple | |
6309 | partitions, and check that the rtl of any PARM_DECLs that are not | |
6310 | cleaned up is that of their default defs. */ | |
46aa019a | 6311 | FOR_EACH_SSA_NAME (i, name, cfun) |
d466b407 | 6312 | { |
d466b407 | 6313 | int part; |
d466b407 | 6314 | |
46aa019a KV |
6315 | /* We might have generated new SSA names in |
6316 | update_alias_info_with_stack_vars. They will have a NULL | |
6317 | defining statements, and won't be part of the partitioning, | |
6318 | so ignore those. */ | |
6319 | if (!SSA_NAME_DEF_STMT (name)) | |
d466b407 MM |
6320 | continue; |
6321 | part = var_to_partition (SA.map, name); | |
6322 | if (part == NO_PARTITION) | |
6323 | continue; | |
70b5e7dc | 6324 | |
1f9ceff1 AO |
6325 | /* If this decl was marked as living in multiple places, reset |
6326 | this now to NULL. */ | |
6327 | tree var = SSA_NAME_VAR (name); | |
6328 | if (var && DECL_RTL_IF_SET (var) == pc_rtx) | |
6329 | SET_DECL_RTL (var, NULL); | |
6330 | /* Check that the pseudos chosen by assign_parms are those of | |
6331 | the corresponding default defs. */ | |
6332 | else if (SSA_NAME_IS_DEFAULT_DEF (name) | |
6333 | && (TREE_CODE (var) == PARM_DECL | |
6334 | || TREE_CODE (var) == RESULT_DECL)) | |
70b5e7dc | 6335 | { |
1f9ceff1 AO |
6336 | rtx in = DECL_RTL_IF_SET (var); |
6337 | gcc_assert (in); | |
6338 | rtx out = SA.partition_to_pseudo[part]; | |
f11a7b6d AO |
6339 | gcc_assert (in == out); |
6340 | ||
6341 | /* Now reset VAR's RTL to IN, so that the _EXPR attrs match | |
6342 | those expected by debug backends for each parm and for | |
6343 | the result. This is particularly important for stabs, | |
6344 | whose register elimination from parm's DECL_RTL may cause | |
6345 | -fcompare-debug differences as SET_DECL_RTL changes reg's | |
6346 | attrs. So, make sure the RTL already has the parm as the | |
6347 | EXPR, so that it won't change. */ | |
6348 | SET_DECL_RTL (var, NULL_RTX); | |
6349 | if (MEM_P (in)) | |
6350 | set_mem_attributes (in, var, true); | |
6351 | SET_DECL_RTL (var, in); | |
70b5e7dc | 6352 | } |
d466b407 MM |
6353 | } |
6354 | ||
242229bb JH |
6355 | /* If this function is `main', emit a call to `__main' |
6356 | to run global initializers, etc. */ | |
6357 | if (DECL_NAME (current_function_decl) | |
6358 | && MAIN_NAME_P (DECL_NAME (current_function_decl)) | |
6359 | && DECL_FILE_SCOPE_P (current_function_decl)) | |
6360 | expand_main_function (); | |
6361 | ||
7d69de61 RH |
6362 | /* Initialize the stack_protect_guard field. This must happen after the |
6363 | call to __main (if any) so that the external decl is initialized. */ | |
87a5dc2d | 6364 | if (crtl->stack_protect_guard && targetm.stack_protect_runtime_enabled_p ()) |
7d69de61 RH |
6365 | stack_protect_prologue (); |
6366 | ||
4e3825db MM |
6367 | expand_phi_nodes (&SA); |
6368 | ||
0d334e37 | 6369 | /* Release any stale SSA redirection data. */ |
b3e46655 | 6370 | redirect_edge_var_map_empty (); |
0d334e37 | 6371 | |
3fbd86b1 | 6372 | /* Register rtl specific functions for cfg. */ |
242229bb JH |
6373 | rtl_register_cfg_hooks (); |
6374 | ||
6375 | init_block = construct_init_block (); | |
6376 | ||
0ef90296 | 6377 | /* Clear EDGE_EXECUTABLE on the entry edge(s). It is cleaned from the |
4e3825db | 6378 | remaining edges later. */ |
be55bfe6 | 6379 | FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR_FOR_FN (fun)->succs) |
0ef90296 ZD |
6380 | e->flags &= ~EDGE_EXECUTABLE; |
6381 | ||
134aa83c | 6382 | lab_rtx_for_bb = new hash_map<basic_block, rtx_code_label *>; |
be55bfe6 | 6383 | FOR_BB_BETWEEN (bb, init_block->next_bb, EXIT_BLOCK_PTR_FOR_FN (fun), |
fefa31b5 | 6384 | next_bb) |
f3ddd692 | 6385 | bb = expand_gimple_basic_block (bb, var_ret_seq != NULL_RTX); |
bf08ebeb | 6386 | |
b5b8b0ac AO |
6387 | if (MAY_HAVE_DEBUG_INSNS) |
6388 | expand_debug_locations (); | |
6389 | ||
dfde35b3 JJ |
6390 | if (deep_ter_debug_map) |
6391 | { | |
6392 | delete deep_ter_debug_map; | |
6393 | deep_ter_debug_map = NULL; | |
6394 | } | |
6395 | ||
452aa9c5 RG |
6396 | /* Free stuff we no longer need after GIMPLE optimizations. */ |
6397 | free_dominance_info (CDI_DOMINATORS); | |
6398 | free_dominance_info (CDI_POST_DOMINATORS); | |
61183076 | 6399 | delete_tree_cfg_annotations (fun); |
452aa9c5 | 6400 | |
f029db69 | 6401 | timevar_push (TV_OUT_OF_SSA); |
4e3825db | 6402 | finish_out_of_ssa (&SA); |
f029db69 | 6403 | timevar_pop (TV_OUT_OF_SSA); |
4e3825db | 6404 | |
f029db69 | 6405 | timevar_push (TV_POST_EXPAND); |
91753e21 | 6406 | /* We are no longer in SSA form. */ |
be55bfe6 | 6407 | fun->gimple_df->in_ssa_p = false; |
726338f4 | 6408 | loops_state_clear (LOOP_CLOSED_SSA); |
91753e21 | 6409 | |
bf08ebeb JH |
6410 | /* Expansion is used by optimization passes too, set maybe_hot_insn_p |
6411 | conservatively to true until they are all profile aware. */ | |
39c8aaa4 | 6412 | delete lab_rtx_for_bb; |
61183076 | 6413 | free_histograms (fun); |
242229bb JH |
6414 | |
6415 | construct_exit_block (); | |
5368224f | 6416 | insn_locations_finalize (); |
242229bb | 6417 | |
f3ddd692 JJ |
6418 | if (var_ret_seq) |
6419 | { | |
dc01c3d1 | 6420 | rtx_insn *after = return_label; |
b47aae36 | 6421 | rtx_insn *next = NEXT_INSN (after); |
f3ddd692 JJ |
6422 | if (next && NOTE_INSN_BASIC_BLOCK_P (next)) |
6423 | after = next; | |
6424 | emit_insn_after (var_ret_seq, after); | |
6425 | } | |
6426 | ||
1d65f45c | 6427 | /* Zap the tree EH table. */ |
be55bfe6 | 6428 | set_eh_throw_stmt_table (fun, NULL); |
242229bb | 6429 | |
42821aff MM |
6430 | /* We need JUMP_LABEL be set in order to redirect jumps, and hence |
6431 | split edges which edge insertions might do. */ | |
242229bb | 6432 | rebuild_jump_labels (get_insns ()); |
242229bb | 6433 | |
be55bfe6 TS |
6434 | FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (fun), |
6435 | EXIT_BLOCK_PTR_FOR_FN (fun), next_bb) | |
4e3825db MM |
6436 | { |
6437 | edge e; | |
6438 | edge_iterator ei; | |
6439 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) | |
6440 | { | |
6441 | if (e->insns.r) | |
bc470c24 | 6442 | { |
3ffa95c2 | 6443 | rebuild_jump_labels_chain (e->insns.r); |
e40191f1 TV |
6444 | /* Put insns after parm birth, but before |
6445 | NOTE_INSNS_FUNCTION_BEG. */ | |
be55bfe6 TS |
6446 | if (e->src == ENTRY_BLOCK_PTR_FOR_FN (fun) |
6447 | && single_succ_p (ENTRY_BLOCK_PTR_FOR_FN (fun))) | |
bc470c24 | 6448 | { |
3ffa95c2 DM |
6449 | rtx_insn *insns = e->insns.r; |
6450 | e->insns.r = NULL; | |
e40191f1 TV |
6451 | if (NOTE_P (parm_birth_insn) |
6452 | && NOTE_KIND (parm_birth_insn) == NOTE_INSN_FUNCTION_BEG) | |
6453 | emit_insn_before_noloc (insns, parm_birth_insn, e->dest); | |
6454 | else | |
6455 | emit_insn_after_noloc (insns, parm_birth_insn, e->dest); | |
bc470c24 JJ |
6456 | } |
6457 | else | |
6458 | commit_one_edge_insertion (e); | |
6459 | } | |
4e3825db MM |
6460 | else |
6461 | ei_next (&ei); | |
6462 | } | |
6463 | } | |
6464 | ||
6465 | /* We're done expanding trees to RTL. */ | |
6466 | currently_expanding_to_rtl = 0; | |
6467 | ||
1b223a9f AO |
6468 | flush_mark_addressable_queue (); |
6469 | ||
be55bfe6 TS |
6470 | FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (fun)->next_bb, |
6471 | EXIT_BLOCK_PTR_FOR_FN (fun), next_bb) | |
4e3825db MM |
6472 | { |
6473 | edge e; | |
6474 | edge_iterator ei; | |
6475 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) | |
6476 | { | |
6477 | /* Clear EDGE_EXECUTABLE. This flag is never used in the backend. */ | |
6478 | e->flags &= ~EDGE_EXECUTABLE; | |
6479 | ||
6480 | /* At the moment not all abnormal edges match the RTL | |
6481 | representation. It is safe to remove them here as | |
6482 | find_many_sub_basic_blocks will rediscover them. | |
6483 | In the future we should get this fixed properly. */ | |
6484 | if ((e->flags & EDGE_ABNORMAL) | |
6485 | && !(e->flags & EDGE_SIBCALL)) | |
6486 | remove_edge (e); | |
6487 | else | |
6488 | ei_next (&ei); | |
6489 | } | |
6490 | } | |
6491 | ||
7ba9e72d | 6492 | auto_sbitmap blocks (last_basic_block_for_fn (fun)); |
f61e445a | 6493 | bitmap_ones (blocks); |
242229bb | 6494 | find_many_sub_basic_blocks (blocks); |
4e3825db | 6495 | purge_all_dead_edges (); |
242229bb | 6496 | |
2e3f842f L |
6497 | expand_stack_alignment (); |
6498 | ||
be147e84 RG |
6499 | /* Fixup REG_EQUIV notes in the prologue if there are tailcalls in this |
6500 | function. */ | |
6501 | if (crtl->tail_call_emit) | |
6502 | fixup_tail_calls (); | |
6503 | ||
dac1fbf8 RG |
6504 | /* After initial rtl generation, call back to finish generating |
6505 | exception support code. We need to do this before cleaning up | |
6506 | the CFG as the code does not expect dead landing pads. */ | |
be55bfe6 | 6507 | if (fun->eh->region_tree != NULL) |
dac1fbf8 RG |
6508 | finish_eh_generation (); |
6509 | ||
8b5d71cd JH |
6510 | /* BB subdivision may have created basic blocks that are are only reachable |
6511 | from unlikely bbs but not marked as such in the profile. */ | |
6512 | if (optimize) | |
6513 | propagate_unlikely_bbs_forward (); | |
6514 | ||
dac1fbf8 RG |
6515 | /* Remove unreachable blocks, otherwise we cannot compute dominators |
6516 | which are needed for loop state verification. As a side-effect | |
6517 | this also compacts blocks. | |
6518 | ??? We cannot remove trivially dead insns here as for example | |
6519 | the DRAP reg on i?86 is not magically live at this point. | |
6520 | gcc.c-torture/execute/ipa-sra-2.c execution, -Os -m32 fails otherwise. */ | |
6521 | cleanup_cfg (CLEANUP_NO_INSN_DEL); | |
6522 | ||
b2b29377 | 6523 | checking_verify_flow_info (); |
9f8628ba | 6524 | |
be147e84 RG |
6525 | /* Initialize pseudos allocated for hard registers. */ |
6526 | emit_initial_value_sets (); | |
6527 | ||
6528 | /* And finally unshare all RTL. */ | |
6529 | unshare_all_rtl (); | |
6530 | ||
9f8628ba PB |
6531 | /* There's no need to defer outputting this function any more; we |
6532 | know we want to output it. */ | |
6533 | DECL_DEFER_OUTPUT (current_function_decl) = 0; | |
6534 | ||
6535 | /* Now that we're done expanding trees to RTL, we shouldn't have any | |
6536 | more CONCATs anywhere. */ | |
6537 | generating_concat_p = 0; | |
6538 | ||
b7211528 SB |
6539 | if (dump_file) |
6540 | { | |
6541 | fprintf (dump_file, | |
6542 | "\n\n;;\n;; Full RTL generated for this function:\n;;\n"); | |
6543 | /* And the pass manager will dump RTL for us. */ | |
6544 | } | |
ef330312 PB |
6545 | |
6546 | /* If we're emitting a nested function, make sure its parent gets | |
6547 | emitted as well. Doing otherwise confuses debug info. */ | |
be55bfe6 TS |
6548 | { |
6549 | tree parent; | |
6550 | for (parent = DECL_CONTEXT (current_function_decl); | |
6551 | parent != NULL_TREE; | |
6552 | parent = get_containing_scope (parent)) | |
6553 | if (TREE_CODE (parent) == FUNCTION_DECL) | |
6554 | TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (parent)) = 1; | |
6555 | } | |
c22cacf3 | 6556 | |
ef330312 | 6557 | TREE_ASM_WRITTEN (current_function_decl) = 1; |
4bb1e037 AP |
6558 | |
6559 | /* After expanding, the return labels are no longer needed. */ | |
6560 | return_label = NULL; | |
6561 | naked_return_label = NULL; | |
0a35513e AH |
6562 | |
6563 | /* After expanding, the tm_restart map is no longer needed. */ | |
be55bfe6 | 6564 | if (fun->gimple_df->tm_restart) |
50979347 | 6565 | fun->gimple_df->tm_restart = NULL; |
0a35513e | 6566 | |
55e092c4 JH |
6567 | /* Tag the blocks with a depth number so that change_scope can find |
6568 | the common parent easily. */ | |
be55bfe6 | 6569 | set_block_levels (DECL_INITIAL (fun->decl), 0); |
bf08ebeb | 6570 | default_rtl_profile (); |
be147e84 | 6571 | |
687aed9c RB |
6572 | /* For -dx discard loops now, otherwise IL verify in clean_state will |
6573 | ICE. */ | |
6574 | if (rtl_dump_and_exit) | |
6575 | { | |
6576 | cfun->curr_properties &= ~PROP_loops; | |
6577 | loop_optimizer_finalize (); | |
6578 | } | |
6579 | ||
f029db69 | 6580 | timevar_pop (TV_POST_EXPAND); |
be147e84 | 6581 | |
c2924966 | 6582 | return 0; |
242229bb JH |
6583 | } |
6584 | ||
27a4cd48 DM |
6585 | } // anon namespace |
6586 | ||
6587 | rtl_opt_pass * | |
6588 | make_pass_expand (gcc::context *ctxt) | |
6589 | { | |
6590 | return new pass_expand (ctxt); | |
6591 | } |