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242229bb | 1 | /* A pass for lowering trees to RTL. |
5624e564 | 2 | Copyright (C) 2004-2015 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" | |
23 | #include "tm.h" | |
242229bb | 24 | #include "rtl.h" |
862d0b35 | 25 | #include "hard-reg-set.h" |
40e23961 MC |
26 | #include "alias.h" |
27 | #include "symtab.h" | |
862d0b35 | 28 | #include "tree.h" |
40e23961 | 29 | #include "fold-const.h" |
d8a2d370 DN |
30 | #include "stringpool.h" |
31 | #include "varasm.h" | |
32 | #include "stor-layout.h" | |
33 | #include "stmt.h" | |
34 | #include "print-tree.h" | |
242229bb | 35 | #include "tm_p.h" |
60393bbc | 36 | #include "predict.h" |
242229bb | 37 | #include "function.h" |
60393bbc AM |
38 | #include "dominance.h" |
39 | #include "cfg.h" | |
40 | #include "cfgrtl.h" | |
41 | #include "cfganal.h" | |
42 | #include "cfgbuild.h" | |
43 | #include "cfgcleanup.h" | |
44 | #include "basic-block.h" | |
b0710fe1 AM |
45 | #include "insn-codes.h" |
46 | #include "optabs.h" | |
36566b39 | 47 | #include "flags.h" |
36566b39 PK |
48 | #include "insn-config.h" |
49 | #include "expmed.h" | |
50 | #include "dojump.h" | |
51 | #include "explow.h" | |
52 | #include "calls.h" | |
53 | #include "emit-rtl.h" | |
242229bb JH |
54 | #include "expr.h" |
55 | #include "langhooks.h" | |
442b4905 | 56 | #include "bitmap.h" |
2fb9a547 AM |
57 | #include "tree-ssa-alias.h" |
58 | #include "internal-fn.h" | |
59 | #include "tree-eh.h" | |
60 | #include "gimple-expr.h" | |
442b4905 | 61 | #include "gimple.h" |
5be5c238 AM |
62 | #include "gimple-iterator.h" |
63 | #include "gimple-walk.h" | |
442b4905 AM |
64 | #include "gimple-ssa.h" |
65 | #include "cgraph.h" | |
66 | #include "tree-cfg.h" | |
67 | #include "tree-phinodes.h" | |
68 | #include "ssa-iterators.h" | |
69 | #include "tree-ssanames.h" | |
70 | #include "tree-dfa.h" | |
7a300452 | 71 | #include "tree-ssa.h" |
242229bb JH |
72 | #include "tree-pass.h" |
73 | #include "except.h" | |
1f6d3a08 | 74 | #include "diagnostic.h" |
cf835838 | 75 | #include "gimple-pretty-print.h" |
1f6d3a08 | 76 | #include "toplev.h" |
ef330312 | 77 | #include "debug.h" |
7d69de61 | 78 | #include "params.h" |
ff28a94d | 79 | #include "tree-inline.h" |
6946b3f7 | 80 | #include "value-prof.h" |
e41b2a33 | 81 | #include "target.h" |
8e9055ae | 82 | #include "tree-ssa-live.h" |
78bca40d | 83 | #include "tree-outof-ssa.h" |
7a8cba34 | 84 | #include "sbitmap.h" |
7d776ee2 | 85 | #include "cfgloop.h" |
be147e84 | 86 | #include "regs.h" /* For reg_renumber. */ |
2b21299c | 87 | #include "insn-attr.h" /* For INSN_SCHEDULING. */ |
f3ddd692 | 88 | #include "asan.h" |
4484a35a | 89 | #include "tree-ssa-address.h" |
862d0b35 DN |
90 | #include "recog.h" |
91 | #include "output.h" | |
9b2b7279 | 92 | #include "builtins.h" |
d5e254e1 IE |
93 | #include "tree-chkp.h" |
94 | #include "rtl-chkp.h" | |
726a989a | 95 | |
8a6ce562 JBG |
96 | /* Some systems use __main in a way incompatible with its use in gcc, in these |
97 | cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to | |
98 | give the same symbol without quotes for an alternative entry point. You | |
99 | must define both, or neither. */ | |
100 | #ifndef NAME__MAIN | |
101 | #define NAME__MAIN "__main" | |
102 | #endif | |
103 | ||
4e3825db MM |
104 | /* This variable holds information helping the rewriting of SSA trees |
105 | into RTL. */ | |
106 | struct ssaexpand SA; | |
107 | ||
a5883ba0 MM |
108 | /* This variable holds the currently expanded gimple statement for purposes |
109 | of comminucating the profile info to the builtin expanders. */ | |
110 | gimple currently_expanding_gimple_stmt; | |
111 | ||
ddb555ed JJ |
112 | static rtx expand_debug_expr (tree); |
113 | ||
726a989a RB |
114 | /* Return an expression tree corresponding to the RHS of GIMPLE |
115 | statement STMT. */ | |
116 | ||
117 | tree | |
118 | gimple_assign_rhs_to_tree (gimple stmt) | |
119 | { | |
120 | tree t; | |
82d6e6fc | 121 | enum gimple_rhs_class grhs_class; |
b8698a0f | 122 | |
82d6e6fc | 123 | grhs_class = get_gimple_rhs_class (gimple_expr_code (stmt)); |
726a989a | 124 | |
0354c0c7 BS |
125 | if (grhs_class == GIMPLE_TERNARY_RHS) |
126 | t = build3 (gimple_assign_rhs_code (stmt), | |
127 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
128 | gimple_assign_rhs1 (stmt), | |
129 | gimple_assign_rhs2 (stmt), | |
130 | gimple_assign_rhs3 (stmt)); | |
131 | else if (grhs_class == GIMPLE_BINARY_RHS) | |
726a989a RB |
132 | t = build2 (gimple_assign_rhs_code (stmt), |
133 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
134 | gimple_assign_rhs1 (stmt), | |
135 | gimple_assign_rhs2 (stmt)); | |
82d6e6fc | 136 | else if (grhs_class == GIMPLE_UNARY_RHS) |
726a989a RB |
137 | t = build1 (gimple_assign_rhs_code (stmt), |
138 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
139 | gimple_assign_rhs1 (stmt)); | |
82d6e6fc | 140 | else if (grhs_class == GIMPLE_SINGLE_RHS) |
b5b8b0ac AO |
141 | { |
142 | t = gimple_assign_rhs1 (stmt); | |
143 | /* Avoid modifying this tree in place below. */ | |
d0ed412a JJ |
144 | if ((gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (t) |
145 | && gimple_location (stmt) != EXPR_LOCATION (t)) | |
146 | || (gimple_block (stmt) | |
147 | && currently_expanding_to_rtl | |
5368224f | 148 | && EXPR_P (t))) |
b5b8b0ac AO |
149 | t = copy_node (t); |
150 | } | |
726a989a RB |
151 | else |
152 | gcc_unreachable (); | |
153 | ||
f5045c96 AM |
154 | if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (t)) |
155 | SET_EXPR_LOCATION (t, gimple_location (stmt)); | |
156 | ||
726a989a RB |
157 | return t; |
158 | } | |
159 | ||
726a989a | 160 | |
1f6d3a08 RH |
161 | #ifndef STACK_ALIGNMENT_NEEDED |
162 | #define STACK_ALIGNMENT_NEEDED 1 | |
163 | #endif | |
164 | ||
4e3825db MM |
165 | #define SSAVAR(x) (TREE_CODE (x) == SSA_NAME ? SSA_NAME_VAR (x) : x) |
166 | ||
167 | /* Associate declaration T with storage space X. If T is no | |
168 | SSA name this is exactly SET_DECL_RTL, otherwise make the | |
169 | partition of T associated with X. */ | |
170 | static inline void | |
171 | set_rtl (tree t, rtx x) | |
172 | { | |
173 | if (TREE_CODE (t) == SSA_NAME) | |
174 | { | |
0f9f9784 AO |
175 | SA.partition_to_pseudo[var_to_partition (SA.map, t)] = x; |
176 | if (x && !MEM_P (x)) | |
177 | set_reg_attrs_for_decl_rtl (SSA_NAME_VAR (t), x); | |
178 | /* For the benefit of debug information at -O0 (where vartracking | |
179 | doesn't run) record the place also in the base DECL if it's | |
180 | a normal variable (not a parameter). */ | |
181 | if (x && x != pc_rtx && TREE_CODE (SSA_NAME_VAR (t)) == VAR_DECL) | |
eb7adebc MM |
182 | { |
183 | tree var = SSA_NAME_VAR (t); | |
184 | /* If we don't yet have something recorded, just record it now. */ | |
185 | if (!DECL_RTL_SET_P (var)) | |
186 | SET_DECL_RTL (var, x); | |
47598145 | 187 | /* If we have it set already to "multiple places" don't |
eb7adebc MM |
188 | change this. */ |
189 | else if (DECL_RTL (var) == pc_rtx) | |
190 | ; | |
191 | /* If we have something recorded and it's not the same place | |
192 | as we want to record now, we have multiple partitions for the | |
193 | same base variable, with different places. We can't just | |
194 | randomly chose one, hence we have to say that we don't know. | |
195 | This only happens with optimization, and there var-tracking | |
196 | will figure out the right thing. */ | |
197 | else if (DECL_RTL (var) != x) | |
198 | SET_DECL_RTL (var, pc_rtx); | |
199 | } | |
4e3825db MM |
200 | } |
201 | else | |
202 | SET_DECL_RTL (t, x); | |
203 | } | |
1f6d3a08 RH |
204 | |
205 | /* This structure holds data relevant to one variable that will be | |
206 | placed in a stack slot. */ | |
207 | struct stack_var | |
208 | { | |
209 | /* The Variable. */ | |
210 | tree decl; | |
211 | ||
1f6d3a08 RH |
212 | /* Initially, the size of the variable. Later, the size of the partition, |
213 | if this variable becomes it's partition's representative. */ | |
214 | HOST_WIDE_INT size; | |
215 | ||
216 | /* The *byte* alignment required for this variable. Or as, with the | |
217 | size, the alignment for this partition. */ | |
218 | unsigned int alignb; | |
219 | ||
220 | /* The partition representative. */ | |
221 | size_t representative; | |
222 | ||
223 | /* The next stack variable in the partition, or EOC. */ | |
224 | size_t next; | |
2bdbbe94 MM |
225 | |
226 | /* The numbers of conflicting stack variables. */ | |
227 | bitmap conflicts; | |
1f6d3a08 RH |
228 | }; |
229 | ||
230 | #define EOC ((size_t)-1) | |
231 | ||
232 | /* We have an array of such objects while deciding allocation. */ | |
233 | static struct stack_var *stack_vars; | |
234 | static size_t stack_vars_alloc; | |
235 | static size_t stack_vars_num; | |
39c8aaa4 | 236 | static hash_map<tree, size_t> *decl_to_stack_part; |
1f6d3a08 | 237 | |
3f9b14ff SB |
238 | /* Conflict bitmaps go on this obstack. This allows us to destroy |
239 | all of them in one big sweep. */ | |
240 | static bitmap_obstack stack_var_bitmap_obstack; | |
241 | ||
fa10beec | 242 | /* An array of indices such that stack_vars[stack_vars_sorted[i]].size |
1f6d3a08 RH |
243 | is non-decreasing. */ |
244 | static size_t *stack_vars_sorted; | |
245 | ||
1f6d3a08 RH |
246 | /* The phase of the stack frame. This is the known misalignment of |
247 | virtual_stack_vars_rtx from PREFERRED_STACK_BOUNDARY. That is, | |
248 | (frame_offset+frame_phase) % PREFERRED_STACK_BOUNDARY == 0. */ | |
249 | static int frame_phase; | |
250 | ||
7d69de61 RH |
251 | /* Used during expand_used_vars to remember if we saw any decls for |
252 | which we'd like to enable stack smashing protection. */ | |
253 | static bool has_protected_decls; | |
254 | ||
255 | /* Used during expand_used_vars. Remember if we say a character buffer | |
256 | smaller than our cutoff threshold. Used for -Wstack-protector. */ | |
257 | static bool has_short_buffer; | |
1f6d3a08 | 258 | |
6f197850 | 259 | /* Compute the byte alignment to use for DECL. Ignore alignment |
765c3e8f L |
260 | we can't do with expected alignment of the stack boundary. */ |
261 | ||
262 | static unsigned int | |
6f197850 | 263 | align_local_variable (tree decl) |
765c3e8f | 264 | { |
3a42502d | 265 | unsigned int align = LOCAL_DECL_ALIGNMENT (decl); |
6f197850 | 266 | DECL_ALIGN (decl) = align; |
1f6d3a08 RH |
267 | return align / BITS_PER_UNIT; |
268 | } | |
269 | ||
435be747 MO |
270 | /* Align given offset BASE with ALIGN. Truncate up if ALIGN_UP is true, |
271 | down otherwise. Return truncated BASE value. */ | |
272 | ||
273 | static inline unsigned HOST_WIDE_INT | |
274 | align_base (HOST_WIDE_INT base, unsigned HOST_WIDE_INT align, bool align_up) | |
275 | { | |
276 | return align_up ? (base + align - 1) & -align : base & -align; | |
277 | } | |
278 | ||
1f6d3a08 RH |
279 | /* Allocate SIZE bytes at byte alignment ALIGN from the stack frame. |
280 | Return the frame offset. */ | |
281 | ||
282 | static HOST_WIDE_INT | |
3a42502d | 283 | alloc_stack_frame_space (HOST_WIDE_INT size, unsigned HOST_WIDE_INT align) |
1f6d3a08 RH |
284 | { |
285 | HOST_WIDE_INT offset, new_frame_offset; | |
286 | ||
1f6d3a08 RH |
287 | if (FRAME_GROWS_DOWNWARD) |
288 | { | |
435be747 MO |
289 | new_frame_offset |
290 | = align_base (frame_offset - frame_phase - size, | |
291 | align, false) + frame_phase; | |
1f6d3a08 RH |
292 | offset = new_frame_offset; |
293 | } | |
294 | else | |
295 | { | |
435be747 MO |
296 | new_frame_offset |
297 | = align_base (frame_offset - frame_phase, align, true) + frame_phase; | |
1f6d3a08 RH |
298 | offset = new_frame_offset; |
299 | new_frame_offset += size; | |
300 | } | |
301 | frame_offset = new_frame_offset; | |
302 | ||
9fb798d7 EB |
303 | if (frame_offset_overflow (frame_offset, cfun->decl)) |
304 | frame_offset = offset = 0; | |
305 | ||
1f6d3a08 RH |
306 | return offset; |
307 | } | |
308 | ||
309 | /* Accumulate DECL into STACK_VARS. */ | |
310 | ||
311 | static void | |
312 | add_stack_var (tree decl) | |
313 | { | |
533f611a RH |
314 | struct stack_var *v; |
315 | ||
1f6d3a08 RH |
316 | if (stack_vars_num >= stack_vars_alloc) |
317 | { | |
318 | if (stack_vars_alloc) | |
319 | stack_vars_alloc = stack_vars_alloc * 3 / 2; | |
320 | else | |
321 | stack_vars_alloc = 32; | |
322 | stack_vars | |
323 | = XRESIZEVEC (struct stack_var, stack_vars, stack_vars_alloc); | |
324 | } | |
47598145 | 325 | if (!decl_to_stack_part) |
39c8aaa4 | 326 | decl_to_stack_part = new hash_map<tree, size_t>; |
47598145 | 327 | |
533f611a | 328 | v = &stack_vars[stack_vars_num]; |
39c8aaa4 | 329 | decl_to_stack_part->put (decl, stack_vars_num); |
533f611a RH |
330 | |
331 | v->decl = decl; | |
ae7e9ddd | 332 | v->size = tree_to_uhwi (DECL_SIZE_UNIT (SSAVAR (decl))); |
533f611a RH |
333 | /* Ensure that all variables have size, so that &a != &b for any two |
334 | variables that are simultaneously live. */ | |
335 | if (v->size == 0) | |
336 | v->size = 1; | |
6f197850 | 337 | v->alignb = align_local_variable (SSAVAR (decl)); |
13868f40 EB |
338 | /* An alignment of zero can mightily confuse us later. */ |
339 | gcc_assert (v->alignb != 0); | |
1f6d3a08 RH |
340 | |
341 | /* All variables are initially in their own partition. */ | |
533f611a RH |
342 | v->representative = stack_vars_num; |
343 | v->next = EOC; | |
1f6d3a08 | 344 | |
2bdbbe94 | 345 | /* All variables initially conflict with no other. */ |
533f611a | 346 | v->conflicts = NULL; |
2bdbbe94 | 347 | |
1f6d3a08 | 348 | /* Ensure that this decl doesn't get put onto the list twice. */ |
4e3825db | 349 | set_rtl (decl, pc_rtx); |
1f6d3a08 RH |
350 | |
351 | stack_vars_num++; | |
352 | } | |
353 | ||
1f6d3a08 RH |
354 | /* Make the decls associated with luid's X and Y conflict. */ |
355 | ||
356 | static void | |
357 | add_stack_var_conflict (size_t x, size_t y) | |
358 | { | |
2bdbbe94 MM |
359 | struct stack_var *a = &stack_vars[x]; |
360 | struct stack_var *b = &stack_vars[y]; | |
361 | if (!a->conflicts) | |
3f9b14ff | 362 | a->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
2bdbbe94 | 363 | if (!b->conflicts) |
3f9b14ff | 364 | b->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
2bdbbe94 MM |
365 | bitmap_set_bit (a->conflicts, y); |
366 | bitmap_set_bit (b->conflicts, x); | |
1f6d3a08 RH |
367 | } |
368 | ||
369 | /* Check whether the decls associated with luid's X and Y conflict. */ | |
370 | ||
371 | static bool | |
372 | stack_var_conflict_p (size_t x, size_t y) | |
373 | { | |
2bdbbe94 MM |
374 | struct stack_var *a = &stack_vars[x]; |
375 | struct stack_var *b = &stack_vars[y]; | |
47598145 MM |
376 | if (x == y) |
377 | return false; | |
378 | /* Partitions containing an SSA name result from gimple registers | |
379 | with things like unsupported modes. They are top-level and | |
380 | hence conflict with everything else. */ | |
381 | if (TREE_CODE (a->decl) == SSA_NAME || TREE_CODE (b->decl) == SSA_NAME) | |
382 | return true; | |
383 | ||
2bdbbe94 MM |
384 | if (!a->conflicts || !b->conflicts) |
385 | return false; | |
386 | return bitmap_bit_p (a->conflicts, y); | |
1f6d3a08 | 387 | } |
b8698a0f | 388 | |
47598145 MM |
389 | /* Callback for walk_stmt_ops. If OP is a decl touched by add_stack_var |
390 | enter its partition number into bitmap DATA. */ | |
391 | ||
392 | static bool | |
9f1363cd | 393 | visit_op (gimple, tree op, tree, void *data) |
47598145 MM |
394 | { |
395 | bitmap active = (bitmap)data; | |
396 | op = get_base_address (op); | |
397 | if (op | |
398 | && DECL_P (op) | |
399 | && DECL_RTL_IF_SET (op) == pc_rtx) | |
400 | { | |
39c8aaa4 | 401 | size_t *v = decl_to_stack_part->get (op); |
47598145 MM |
402 | if (v) |
403 | bitmap_set_bit (active, *v); | |
404 | } | |
405 | return false; | |
406 | } | |
407 | ||
408 | /* Callback for walk_stmt_ops. If OP is a decl touched by add_stack_var | |
409 | record conflicts between it and all currently active other partitions | |
410 | from bitmap DATA. */ | |
411 | ||
412 | static bool | |
9f1363cd | 413 | visit_conflict (gimple, tree op, tree, void *data) |
47598145 MM |
414 | { |
415 | bitmap active = (bitmap)data; | |
416 | op = get_base_address (op); | |
417 | if (op | |
418 | && DECL_P (op) | |
419 | && DECL_RTL_IF_SET (op) == pc_rtx) | |
420 | { | |
39c8aaa4 | 421 | size_t *v = decl_to_stack_part->get (op); |
47598145 MM |
422 | if (v && bitmap_set_bit (active, *v)) |
423 | { | |
424 | size_t num = *v; | |
425 | bitmap_iterator bi; | |
426 | unsigned i; | |
427 | gcc_assert (num < stack_vars_num); | |
428 | EXECUTE_IF_SET_IN_BITMAP (active, 0, i, bi) | |
429 | add_stack_var_conflict (num, i); | |
430 | } | |
431 | } | |
432 | return false; | |
433 | } | |
434 | ||
435 | /* Helper routine for add_scope_conflicts, calculating the active partitions | |
436 | at the end of BB, leaving the result in WORK. We're called to generate | |
81bfd197 MM |
437 | conflicts when FOR_CONFLICT is true, otherwise we're just tracking |
438 | liveness. */ | |
47598145 MM |
439 | |
440 | static void | |
81bfd197 | 441 | add_scope_conflicts_1 (basic_block bb, bitmap work, bool for_conflict) |
47598145 MM |
442 | { |
443 | edge e; | |
444 | edge_iterator ei; | |
445 | gimple_stmt_iterator gsi; | |
9f1363cd | 446 | walk_stmt_load_store_addr_fn visit; |
47598145 MM |
447 | |
448 | bitmap_clear (work); | |
449 | FOR_EACH_EDGE (e, ei, bb->preds) | |
450 | bitmap_ior_into (work, (bitmap)e->src->aux); | |
451 | ||
ea85edfe | 452 | visit = visit_op; |
47598145 MM |
453 | |
454 | for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
455 | { | |
456 | gimple stmt = gsi_stmt (gsi); | |
ea85edfe | 457 | walk_stmt_load_store_addr_ops (stmt, work, NULL, NULL, visit); |
47598145 | 458 | } |
ea85edfe | 459 | for (gsi = gsi_after_labels (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
47598145 MM |
460 | { |
461 | gimple stmt = gsi_stmt (gsi); | |
462 | ||
463 | if (gimple_clobber_p (stmt)) | |
464 | { | |
465 | tree lhs = gimple_assign_lhs (stmt); | |
466 | size_t *v; | |
467 | /* Nested function lowering might introduce LHSs | |
468 | that are COMPONENT_REFs. */ | |
469 | if (TREE_CODE (lhs) != VAR_DECL) | |
470 | continue; | |
471 | if (DECL_RTL_IF_SET (lhs) == pc_rtx | |
39c8aaa4 | 472 | && (v = decl_to_stack_part->get (lhs))) |
47598145 MM |
473 | bitmap_clear_bit (work, *v); |
474 | } | |
475 | else if (!is_gimple_debug (stmt)) | |
ea85edfe | 476 | { |
81bfd197 | 477 | if (for_conflict |
ea85edfe JJ |
478 | && visit == visit_op) |
479 | { | |
480 | /* If this is the first real instruction in this BB we need | |
88d599dc MM |
481 | to add conflicts for everything live at this point now. |
482 | Unlike classical liveness for named objects we can't | |
ea85edfe JJ |
483 | rely on seeing a def/use of the names we're interested in. |
484 | There might merely be indirect loads/stores. We'd not add any | |
81bfd197 | 485 | conflicts for such partitions. */ |
ea85edfe JJ |
486 | bitmap_iterator bi; |
487 | unsigned i; | |
81bfd197 | 488 | EXECUTE_IF_SET_IN_BITMAP (work, 0, i, bi) |
ea85edfe | 489 | { |
9b44f5d9 MM |
490 | struct stack_var *a = &stack_vars[i]; |
491 | if (!a->conflicts) | |
3f9b14ff | 492 | a->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
9b44f5d9 | 493 | bitmap_ior_into (a->conflicts, work); |
ea85edfe JJ |
494 | } |
495 | visit = visit_conflict; | |
496 | } | |
497 | walk_stmt_load_store_addr_ops (stmt, work, visit, visit, visit); | |
498 | } | |
47598145 MM |
499 | } |
500 | } | |
501 | ||
502 | /* Generate stack partition conflicts between all partitions that are | |
503 | simultaneously live. */ | |
504 | ||
505 | static void | |
506 | add_scope_conflicts (void) | |
507 | { | |
508 | basic_block bb; | |
509 | bool changed; | |
510 | bitmap work = BITMAP_ALLOC (NULL); | |
9b44f5d9 MM |
511 | int *rpo; |
512 | int n_bbs; | |
47598145 | 513 | |
88d599dc | 514 | /* We approximate the live range of a stack variable by taking the first |
47598145 MM |
515 | mention of its name as starting point(s), and by the end-of-scope |
516 | death clobber added by gimplify as ending point(s) of the range. | |
517 | This overapproximates in the case we for instance moved an address-taken | |
518 | operation upward, without also moving a dereference to it upwards. | |
519 | But it's conservatively correct as a variable never can hold values | |
520 | before its name is mentioned at least once. | |
521 | ||
88d599dc | 522 | We then do a mostly classical bitmap liveness algorithm. */ |
47598145 | 523 | |
04a90bec | 524 | FOR_ALL_BB_FN (bb, cfun) |
3f9b14ff | 525 | bb->aux = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
47598145 | 526 | |
8b1c6fd7 | 527 | rpo = XNEWVEC (int, last_basic_block_for_fn (cfun)); |
9b44f5d9 MM |
528 | n_bbs = pre_and_rev_post_order_compute (NULL, rpo, false); |
529 | ||
47598145 MM |
530 | changed = true; |
531 | while (changed) | |
532 | { | |
9b44f5d9 | 533 | int i; |
47598145 | 534 | changed = false; |
9b44f5d9 | 535 | for (i = 0; i < n_bbs; i++) |
47598145 | 536 | { |
9b44f5d9 | 537 | bitmap active; |
06e28de2 | 538 | bb = BASIC_BLOCK_FOR_FN (cfun, rpo[i]); |
9b44f5d9 | 539 | active = (bitmap)bb->aux; |
81bfd197 | 540 | add_scope_conflicts_1 (bb, work, false); |
47598145 MM |
541 | if (bitmap_ior_into (active, work)) |
542 | changed = true; | |
543 | } | |
544 | } | |
545 | ||
11cd3bed | 546 | FOR_EACH_BB_FN (bb, cfun) |
81bfd197 | 547 | add_scope_conflicts_1 (bb, work, true); |
47598145 | 548 | |
9b44f5d9 | 549 | free (rpo); |
47598145 | 550 | BITMAP_FREE (work); |
04a90bec | 551 | FOR_ALL_BB_FN (bb, cfun) |
47598145 MM |
552 | BITMAP_FREE (bb->aux); |
553 | } | |
554 | ||
1f6d3a08 | 555 | /* A subroutine of partition_stack_vars. A comparison function for qsort, |
3a42502d | 556 | sorting an array of indices by the properties of the object. */ |
1f6d3a08 RH |
557 | |
558 | static int | |
3a42502d | 559 | stack_var_cmp (const void *a, const void *b) |
1f6d3a08 | 560 | { |
3a42502d RH |
561 | size_t ia = *(const size_t *)a; |
562 | size_t ib = *(const size_t *)b; | |
563 | unsigned int aligna = stack_vars[ia].alignb; | |
564 | unsigned int alignb = stack_vars[ib].alignb; | |
565 | HOST_WIDE_INT sizea = stack_vars[ia].size; | |
566 | HOST_WIDE_INT sizeb = stack_vars[ib].size; | |
567 | tree decla = stack_vars[ia].decl; | |
568 | tree declb = stack_vars[ib].decl; | |
569 | bool largea, largeb; | |
4e3825db | 570 | unsigned int uida, uidb; |
1f6d3a08 | 571 | |
3a42502d RH |
572 | /* Primary compare on "large" alignment. Large comes first. */ |
573 | largea = (aligna * BITS_PER_UNIT > MAX_SUPPORTED_STACK_ALIGNMENT); | |
574 | largeb = (alignb * BITS_PER_UNIT > MAX_SUPPORTED_STACK_ALIGNMENT); | |
575 | if (largea != largeb) | |
576 | return (int)largeb - (int)largea; | |
577 | ||
578 | /* Secondary compare on size, decreasing */ | |
3a42502d | 579 | if (sizea > sizeb) |
6ddfda8a ER |
580 | return -1; |
581 | if (sizea < sizeb) | |
1f6d3a08 | 582 | return 1; |
3a42502d RH |
583 | |
584 | /* Tertiary compare on true alignment, decreasing. */ | |
585 | if (aligna < alignb) | |
586 | return -1; | |
587 | if (aligna > alignb) | |
588 | return 1; | |
589 | ||
590 | /* Final compare on ID for sort stability, increasing. | |
591 | Two SSA names are compared by their version, SSA names come before | |
592 | non-SSA names, and two normal decls are compared by their DECL_UID. */ | |
4e3825db MM |
593 | if (TREE_CODE (decla) == SSA_NAME) |
594 | { | |
595 | if (TREE_CODE (declb) == SSA_NAME) | |
596 | uida = SSA_NAME_VERSION (decla), uidb = SSA_NAME_VERSION (declb); | |
597 | else | |
598 | return -1; | |
599 | } | |
600 | else if (TREE_CODE (declb) == SSA_NAME) | |
601 | return 1; | |
602 | else | |
603 | uida = DECL_UID (decla), uidb = DECL_UID (declb); | |
79f802f5 | 604 | if (uida < uidb) |
79f802f5 | 605 | return 1; |
3a42502d RH |
606 | if (uida > uidb) |
607 | return -1; | |
1f6d3a08 RH |
608 | return 0; |
609 | } | |
610 | ||
0ef08bc5 | 611 | struct part_traits : unbounded_int_hashmap_traits <size_t, bitmap> {}; |
39c8aaa4 | 612 | typedef hash_map<size_t, bitmap, part_traits> part_hashmap; |
55b34b5f RG |
613 | |
614 | /* If the points-to solution *PI points to variables that are in a partition | |
615 | together with other variables add all partition members to the pointed-to | |
616 | variables bitmap. */ | |
617 | ||
618 | static void | |
619 | add_partitioned_vars_to_ptset (struct pt_solution *pt, | |
39c8aaa4 | 620 | part_hashmap *decls_to_partitions, |
6e2830c3 | 621 | hash_set<bitmap> *visited, bitmap temp) |
55b34b5f RG |
622 | { |
623 | bitmap_iterator bi; | |
624 | unsigned i; | |
625 | bitmap *part; | |
626 | ||
627 | if (pt->anything | |
628 | || pt->vars == NULL | |
629 | /* The pointed-to vars bitmap is shared, it is enough to | |
630 | visit it once. */ | |
6e2830c3 | 631 | || visited->add (pt->vars)) |
55b34b5f RG |
632 | return; |
633 | ||
634 | bitmap_clear (temp); | |
635 | ||
636 | /* By using a temporary bitmap to store all members of the partitions | |
637 | we have to add we make sure to visit each of the partitions only | |
638 | once. */ | |
639 | EXECUTE_IF_SET_IN_BITMAP (pt->vars, 0, i, bi) | |
640 | if ((!temp | |
641 | || !bitmap_bit_p (temp, i)) | |
39c8aaa4 | 642 | && (part = decls_to_partitions->get (i))) |
55b34b5f RG |
643 | bitmap_ior_into (temp, *part); |
644 | if (!bitmap_empty_p (temp)) | |
645 | bitmap_ior_into (pt->vars, temp); | |
646 | } | |
647 | ||
648 | /* Update points-to sets based on partition info, so we can use them on RTL. | |
649 | The bitmaps representing stack partitions will be saved until expand, | |
650 | where partitioned decls used as bases in memory expressions will be | |
651 | rewritten. */ | |
652 | ||
653 | static void | |
654 | update_alias_info_with_stack_vars (void) | |
655 | { | |
39c8aaa4 | 656 | part_hashmap *decls_to_partitions = NULL; |
55b34b5f RG |
657 | size_t i, j; |
658 | tree var = NULL_TREE; | |
659 | ||
660 | for (i = 0; i < stack_vars_num; i++) | |
661 | { | |
662 | bitmap part = NULL; | |
663 | tree name; | |
664 | struct ptr_info_def *pi; | |
665 | ||
666 | /* Not interested in partitions with single variable. */ | |
667 | if (stack_vars[i].representative != i | |
668 | || stack_vars[i].next == EOC) | |
669 | continue; | |
670 | ||
671 | if (!decls_to_partitions) | |
672 | { | |
39c8aaa4 TS |
673 | decls_to_partitions = new part_hashmap; |
674 | cfun->gimple_df->decls_to_pointers = new hash_map<tree, tree>; | |
55b34b5f RG |
675 | } |
676 | ||
677 | /* Create an SSA_NAME that points to the partition for use | |
678 | as base during alias-oracle queries on RTL for bases that | |
679 | have been partitioned. */ | |
680 | if (var == NULL_TREE) | |
b731b390 JJ |
681 | var = create_tmp_var (ptr_type_node); |
682 | name = make_ssa_name (var); | |
55b34b5f RG |
683 | |
684 | /* Create bitmaps representing partitions. They will be used for | |
685 | points-to sets later, so use GGC alloc. */ | |
686 | part = BITMAP_GGC_ALLOC (); | |
687 | for (j = i; j != EOC; j = stack_vars[j].next) | |
688 | { | |
689 | tree decl = stack_vars[j].decl; | |
25a6a873 | 690 | unsigned int uid = DECL_PT_UID (decl); |
55b34b5f | 691 | bitmap_set_bit (part, uid); |
39c8aaa4 TS |
692 | decls_to_partitions->put (uid, part); |
693 | cfun->gimple_df->decls_to_pointers->put (decl, name); | |
88d8330d EB |
694 | if (TREE_ADDRESSABLE (decl)) |
695 | TREE_ADDRESSABLE (name) = 1; | |
55b34b5f RG |
696 | } |
697 | ||
698 | /* Make the SSA name point to all partition members. */ | |
699 | pi = get_ptr_info (name); | |
d3553615 | 700 | pt_solution_set (&pi->pt, part, false); |
55b34b5f RG |
701 | } |
702 | ||
703 | /* Make all points-to sets that contain one member of a partition | |
704 | contain all members of the partition. */ | |
705 | if (decls_to_partitions) | |
706 | { | |
707 | unsigned i; | |
6e2830c3 | 708 | hash_set<bitmap> visited; |
3f9b14ff | 709 | bitmap temp = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
55b34b5f RG |
710 | |
711 | for (i = 1; i < num_ssa_names; i++) | |
712 | { | |
713 | tree name = ssa_name (i); | |
714 | struct ptr_info_def *pi; | |
715 | ||
716 | if (name | |
717 | && POINTER_TYPE_P (TREE_TYPE (name)) | |
718 | && ((pi = SSA_NAME_PTR_INFO (name)) != NULL)) | |
719 | add_partitioned_vars_to_ptset (&pi->pt, decls_to_partitions, | |
6e2830c3 | 720 | &visited, temp); |
55b34b5f RG |
721 | } |
722 | ||
723 | add_partitioned_vars_to_ptset (&cfun->gimple_df->escaped, | |
6e2830c3 | 724 | decls_to_partitions, &visited, temp); |
55b34b5f | 725 | |
39c8aaa4 | 726 | delete decls_to_partitions; |
55b34b5f RG |
727 | BITMAP_FREE (temp); |
728 | } | |
729 | } | |
730 | ||
1f6d3a08 RH |
731 | /* A subroutine of partition_stack_vars. The UNION portion of a UNION/FIND |
732 | partitioning algorithm. Partitions A and B are known to be non-conflicting. | |
6ddfda8a | 733 | Merge them into a single partition A. */ |
1f6d3a08 RH |
734 | |
735 | static void | |
6ddfda8a | 736 | union_stack_vars (size_t a, size_t b) |
1f6d3a08 | 737 | { |
2bdbbe94 MM |
738 | struct stack_var *vb = &stack_vars[b]; |
739 | bitmap_iterator bi; | |
740 | unsigned u; | |
1f6d3a08 | 741 | |
6ddfda8a ER |
742 | gcc_assert (stack_vars[b].next == EOC); |
743 | /* Add B to A's partition. */ | |
744 | stack_vars[b].next = stack_vars[a].next; | |
745 | stack_vars[b].representative = a; | |
1f6d3a08 RH |
746 | stack_vars[a].next = b; |
747 | ||
748 | /* Update the required alignment of partition A to account for B. */ | |
749 | if (stack_vars[a].alignb < stack_vars[b].alignb) | |
750 | stack_vars[a].alignb = stack_vars[b].alignb; | |
751 | ||
752 | /* Update the interference graph and merge the conflicts. */ | |
2bdbbe94 MM |
753 | if (vb->conflicts) |
754 | { | |
755 | EXECUTE_IF_SET_IN_BITMAP (vb->conflicts, 0, u, bi) | |
756 | add_stack_var_conflict (a, stack_vars[u].representative); | |
757 | BITMAP_FREE (vb->conflicts); | |
758 | } | |
1f6d3a08 RH |
759 | } |
760 | ||
761 | /* A subroutine of expand_used_vars. Binpack the variables into | |
762 | partitions constrained by the interference graph. The overall | |
763 | algorithm used is as follows: | |
764 | ||
6ddfda8a | 765 | Sort the objects by size in descending order. |
1f6d3a08 RH |
766 | For each object A { |
767 | S = size(A) | |
768 | O = 0 | |
769 | loop { | |
770 | Look for the largest non-conflicting object B with size <= S. | |
771 | UNION (A, B) | |
1f6d3a08 RH |
772 | } |
773 | } | |
774 | */ | |
775 | ||
776 | static void | |
777 | partition_stack_vars (void) | |
778 | { | |
779 | size_t si, sj, n = stack_vars_num; | |
780 | ||
781 | stack_vars_sorted = XNEWVEC (size_t, stack_vars_num); | |
782 | for (si = 0; si < n; ++si) | |
783 | stack_vars_sorted[si] = si; | |
784 | ||
785 | if (n == 1) | |
786 | return; | |
787 | ||
3a42502d | 788 | qsort (stack_vars_sorted, n, sizeof (size_t), stack_var_cmp); |
1f6d3a08 | 789 | |
1f6d3a08 RH |
790 | for (si = 0; si < n; ++si) |
791 | { | |
792 | size_t i = stack_vars_sorted[si]; | |
3a42502d | 793 | unsigned int ialign = stack_vars[i].alignb; |
f3ddd692 | 794 | HOST_WIDE_INT isize = stack_vars[i].size; |
1f6d3a08 | 795 | |
6ddfda8a ER |
796 | /* Ignore objects that aren't partition representatives. If we |
797 | see a var that is not a partition representative, it must | |
798 | have been merged earlier. */ | |
799 | if (stack_vars[i].representative != i) | |
800 | continue; | |
801 | ||
802 | for (sj = si + 1; sj < n; ++sj) | |
1f6d3a08 RH |
803 | { |
804 | size_t j = stack_vars_sorted[sj]; | |
1f6d3a08 | 805 | unsigned int jalign = stack_vars[j].alignb; |
f3ddd692 | 806 | HOST_WIDE_INT jsize = stack_vars[j].size; |
1f6d3a08 RH |
807 | |
808 | /* Ignore objects that aren't partition representatives. */ | |
809 | if (stack_vars[j].representative != j) | |
810 | continue; | |
811 | ||
3a42502d RH |
812 | /* Do not mix objects of "small" (supported) alignment |
813 | and "large" (unsupported) alignment. */ | |
814 | if ((ialign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
815 | != (jalign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT)) | |
f3ddd692 JJ |
816 | break; |
817 | ||
818 | /* For Address Sanitizer do not mix objects with different | |
819 | sizes, as the shorter vars wouldn't be adequately protected. | |
820 | Don't do that for "large" (unsupported) alignment objects, | |
821 | those aren't protected anyway. */ | |
b5ebc991 | 822 | if ((flag_sanitize & SANITIZE_ADDRESS) && ASAN_STACK && isize != jsize |
f3ddd692 JJ |
823 | && ialign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) |
824 | break; | |
825 | ||
826 | /* Ignore conflicting objects. */ | |
827 | if (stack_var_conflict_p (i, j)) | |
3a42502d RH |
828 | continue; |
829 | ||
1f6d3a08 | 830 | /* UNION the objects, placing J at OFFSET. */ |
6ddfda8a | 831 | union_stack_vars (i, j); |
1f6d3a08 RH |
832 | } |
833 | } | |
55b34b5f | 834 | |
9b999dc5 | 835 | update_alias_info_with_stack_vars (); |
1f6d3a08 RH |
836 | } |
837 | ||
838 | /* A debugging aid for expand_used_vars. Dump the generated partitions. */ | |
839 | ||
840 | static void | |
841 | dump_stack_var_partition (void) | |
842 | { | |
843 | size_t si, i, j, n = stack_vars_num; | |
844 | ||
845 | for (si = 0; si < n; ++si) | |
846 | { | |
847 | i = stack_vars_sorted[si]; | |
848 | ||
849 | /* Skip variables that aren't partition representatives, for now. */ | |
850 | if (stack_vars[i].representative != i) | |
851 | continue; | |
852 | ||
853 | fprintf (dump_file, "Partition %lu: size " HOST_WIDE_INT_PRINT_DEC | |
854 | " align %u\n", (unsigned long) i, stack_vars[i].size, | |
855 | stack_vars[i].alignb); | |
856 | ||
857 | for (j = i; j != EOC; j = stack_vars[j].next) | |
858 | { | |
859 | fputc ('\t', dump_file); | |
860 | print_generic_expr (dump_file, stack_vars[j].decl, dump_flags); | |
1f6d3a08 | 861 | } |
6ddfda8a | 862 | fputc ('\n', dump_file); |
1f6d3a08 RH |
863 | } |
864 | } | |
865 | ||
3a42502d | 866 | /* Assign rtl to DECL at BASE + OFFSET. */ |
1f6d3a08 RH |
867 | |
868 | static void | |
3a42502d RH |
869 | expand_one_stack_var_at (tree decl, rtx base, unsigned base_align, |
870 | HOST_WIDE_INT offset) | |
1f6d3a08 | 871 | { |
3a42502d | 872 | unsigned align; |
1f6d3a08 | 873 | rtx x; |
c22cacf3 | 874 | |
1f6d3a08 RH |
875 | /* If this fails, we've overflowed the stack frame. Error nicely? */ |
876 | gcc_assert (offset == trunc_int_for_mode (offset, Pmode)); | |
877 | ||
0a81f074 | 878 | x = plus_constant (Pmode, base, offset); |
0f9f9784 | 879 | x = gen_rtx_MEM (DECL_MODE (SSAVAR (decl)), x); |
1f6d3a08 | 880 | |
4e3825db MM |
881 | if (TREE_CODE (decl) != SSA_NAME) |
882 | { | |
883 | /* Set alignment we actually gave this decl if it isn't an SSA name. | |
884 | If it is we generate stack slots only accidentally so it isn't as | |
885 | important, we'll simply use the alignment that is already set. */ | |
3a42502d RH |
886 | if (base == virtual_stack_vars_rtx) |
887 | offset -= frame_phase; | |
4e3825db MM |
888 | align = offset & -offset; |
889 | align *= BITS_PER_UNIT; | |
3a42502d RH |
890 | if (align == 0 || align > base_align) |
891 | align = base_align; | |
892 | ||
893 | /* One would think that we could assert that we're not decreasing | |
894 | alignment here, but (at least) the i386 port does exactly this | |
895 | via the MINIMUM_ALIGNMENT hook. */ | |
4e3825db MM |
896 | |
897 | DECL_ALIGN (decl) = align; | |
898 | DECL_USER_ALIGN (decl) = 0; | |
899 | } | |
900 | ||
0f9f9784 | 901 | set_mem_attributes (x, SSAVAR (decl), true); |
4e3825db | 902 | set_rtl (decl, x); |
1f6d3a08 RH |
903 | } |
904 | ||
f3ddd692 JJ |
905 | struct stack_vars_data |
906 | { | |
907 | /* Vector of offset pairs, always end of some padding followed | |
908 | by start of the padding that needs Address Sanitizer protection. | |
909 | The vector is in reversed, highest offset pairs come first. */ | |
9771b263 | 910 | vec<HOST_WIDE_INT> asan_vec; |
f3ddd692 JJ |
911 | |
912 | /* Vector of partition representative decls in between the paddings. */ | |
9771b263 | 913 | vec<tree> asan_decl_vec; |
e361382f JJ |
914 | |
915 | /* Base pseudo register for Address Sanitizer protected automatic vars. */ | |
916 | rtx asan_base; | |
917 | ||
918 | /* Alignment needed for the Address Sanitizer protected automatic vars. */ | |
919 | unsigned int asan_alignb; | |
f3ddd692 JJ |
920 | }; |
921 | ||
1f6d3a08 RH |
922 | /* A subroutine of expand_used_vars. Give each partition representative |
923 | a unique location within the stack frame. Update each partition member | |
924 | with that location. */ | |
925 | ||
926 | static void | |
f3ddd692 | 927 | expand_stack_vars (bool (*pred) (size_t), struct stack_vars_data *data) |
1f6d3a08 RH |
928 | { |
929 | size_t si, i, j, n = stack_vars_num; | |
3a42502d RH |
930 | HOST_WIDE_INT large_size = 0, large_alloc = 0; |
931 | rtx large_base = NULL; | |
932 | unsigned large_align = 0; | |
933 | tree decl; | |
934 | ||
935 | /* Determine if there are any variables requiring "large" alignment. | |
936 | Since these are dynamically allocated, we only process these if | |
937 | no predicate involved. */ | |
938 | large_align = stack_vars[stack_vars_sorted[0]].alignb * BITS_PER_UNIT; | |
939 | if (pred == NULL && large_align > MAX_SUPPORTED_STACK_ALIGNMENT) | |
940 | { | |
941 | /* Find the total size of these variables. */ | |
942 | for (si = 0; si < n; ++si) | |
943 | { | |
944 | unsigned alignb; | |
945 | ||
946 | i = stack_vars_sorted[si]; | |
947 | alignb = stack_vars[i].alignb; | |
948 | ||
a8eeec27 SE |
949 | /* All "large" alignment decls come before all "small" alignment |
950 | decls, but "large" alignment decls are not sorted based on | |
951 | their alignment. Increase large_align to track the largest | |
952 | required alignment. */ | |
953 | if ((alignb * BITS_PER_UNIT) > large_align) | |
954 | large_align = alignb * BITS_PER_UNIT; | |
955 | ||
3a42502d RH |
956 | /* Stop when we get to the first decl with "small" alignment. */ |
957 | if (alignb * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
958 | break; | |
959 | ||
960 | /* Skip variables that aren't partition representatives. */ | |
961 | if (stack_vars[i].representative != i) | |
962 | continue; | |
963 | ||
964 | /* Skip variables that have already had rtl assigned. See also | |
965 | add_stack_var where we perpetrate this pc_rtx hack. */ | |
966 | decl = stack_vars[i].decl; | |
967 | if ((TREE_CODE (decl) == SSA_NAME | |
968 | ? SA.partition_to_pseudo[var_to_partition (SA.map, decl)] | |
969 | : DECL_RTL (decl)) != pc_rtx) | |
970 | continue; | |
971 | ||
972 | large_size += alignb - 1; | |
973 | large_size &= -(HOST_WIDE_INT)alignb; | |
974 | large_size += stack_vars[i].size; | |
975 | } | |
976 | ||
977 | /* If there were any, allocate space. */ | |
978 | if (large_size > 0) | |
979 | large_base = allocate_dynamic_stack_space (GEN_INT (large_size), 0, | |
980 | large_align, true); | |
981 | } | |
1f6d3a08 RH |
982 | |
983 | for (si = 0; si < n; ++si) | |
984 | { | |
3a42502d RH |
985 | rtx base; |
986 | unsigned base_align, alignb; | |
1f6d3a08 RH |
987 | HOST_WIDE_INT offset; |
988 | ||
989 | i = stack_vars_sorted[si]; | |
990 | ||
991 | /* Skip variables that aren't partition representatives, for now. */ | |
992 | if (stack_vars[i].representative != i) | |
993 | continue; | |
994 | ||
7d69de61 RH |
995 | /* Skip variables that have already had rtl assigned. See also |
996 | add_stack_var where we perpetrate this pc_rtx hack. */ | |
3a42502d RH |
997 | decl = stack_vars[i].decl; |
998 | if ((TREE_CODE (decl) == SSA_NAME | |
999 | ? SA.partition_to_pseudo[var_to_partition (SA.map, decl)] | |
1000 | : DECL_RTL (decl)) != pc_rtx) | |
7d69de61 RH |
1001 | continue; |
1002 | ||
c22cacf3 | 1003 | /* Check the predicate to see whether this variable should be |
7d69de61 | 1004 | allocated in this pass. */ |
f3ddd692 | 1005 | if (pred && !pred (i)) |
7d69de61 RH |
1006 | continue; |
1007 | ||
3a42502d RH |
1008 | alignb = stack_vars[i].alignb; |
1009 | if (alignb * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
1010 | { | |
e361382f | 1011 | base = virtual_stack_vars_rtx; |
b5ebc991 | 1012 | if ((flag_sanitize & SANITIZE_ADDRESS) && ASAN_STACK && pred) |
f3ddd692 | 1013 | { |
435be747 MO |
1014 | HOST_WIDE_INT prev_offset |
1015 | = align_base (frame_offset, | |
1016 | MAX (alignb, ASAN_RED_ZONE_SIZE), | |
1017 | FRAME_GROWS_DOWNWARD); | |
f3ddd692 | 1018 | tree repr_decl = NULL_TREE; |
f3ddd692 JJ |
1019 | offset |
1020 | = alloc_stack_frame_space (stack_vars[i].size | |
1021 | + ASAN_RED_ZONE_SIZE, | |
1022 | MAX (alignb, ASAN_RED_ZONE_SIZE)); | |
435be747 | 1023 | |
9771b263 DN |
1024 | data->asan_vec.safe_push (prev_offset); |
1025 | data->asan_vec.safe_push (offset + stack_vars[i].size); | |
f3ddd692 JJ |
1026 | /* Find best representative of the partition. |
1027 | Prefer those with DECL_NAME, even better | |
1028 | satisfying asan_protect_stack_decl predicate. */ | |
1029 | for (j = i; j != EOC; j = stack_vars[j].next) | |
1030 | if (asan_protect_stack_decl (stack_vars[j].decl) | |
1031 | && DECL_NAME (stack_vars[j].decl)) | |
1032 | { | |
1033 | repr_decl = stack_vars[j].decl; | |
1034 | break; | |
1035 | } | |
1036 | else if (repr_decl == NULL_TREE | |
1037 | && DECL_P (stack_vars[j].decl) | |
1038 | && DECL_NAME (stack_vars[j].decl)) | |
1039 | repr_decl = stack_vars[j].decl; | |
1040 | if (repr_decl == NULL_TREE) | |
1041 | repr_decl = stack_vars[i].decl; | |
9771b263 | 1042 | data->asan_decl_vec.safe_push (repr_decl); |
e361382f JJ |
1043 | data->asan_alignb = MAX (data->asan_alignb, alignb); |
1044 | if (data->asan_base == NULL) | |
1045 | data->asan_base = gen_reg_rtx (Pmode); | |
1046 | base = data->asan_base; | |
e5dcd695 LZ |
1047 | |
1048 | if (!STRICT_ALIGNMENT) | |
1049 | base_align = crtl->max_used_stack_slot_alignment; | |
1050 | else | |
1051 | base_align = MAX (crtl->max_used_stack_slot_alignment, | |
1052 | GET_MODE_ALIGNMENT (SImode) | |
1053 | << ASAN_SHADOW_SHIFT); | |
f3ddd692 JJ |
1054 | } |
1055 | else | |
e5dcd695 LZ |
1056 | { |
1057 | offset = alloc_stack_frame_space (stack_vars[i].size, alignb); | |
1058 | base_align = crtl->max_used_stack_slot_alignment; | |
1059 | } | |
3a42502d RH |
1060 | } |
1061 | else | |
1062 | { | |
1063 | /* Large alignment is only processed in the last pass. */ | |
1064 | if (pred) | |
1065 | continue; | |
533f611a | 1066 | gcc_assert (large_base != NULL); |
3a42502d RH |
1067 | |
1068 | large_alloc += alignb - 1; | |
1069 | large_alloc &= -(HOST_WIDE_INT)alignb; | |
1070 | offset = large_alloc; | |
1071 | large_alloc += stack_vars[i].size; | |
1072 | ||
1073 | base = large_base; | |
1074 | base_align = large_align; | |
1075 | } | |
1f6d3a08 RH |
1076 | |
1077 | /* Create rtl for each variable based on their location within the | |
1078 | partition. */ | |
1079 | for (j = i; j != EOC; j = stack_vars[j].next) | |
f8da8190 | 1080 | { |
f8da8190 | 1081 | expand_one_stack_var_at (stack_vars[j].decl, |
3a42502d | 1082 | base, base_align, |
6ddfda8a | 1083 | offset); |
f8da8190 | 1084 | } |
1f6d3a08 | 1085 | } |
3a42502d RH |
1086 | |
1087 | gcc_assert (large_alloc == large_size); | |
1f6d3a08 RH |
1088 | } |
1089 | ||
ff28a94d JH |
1090 | /* Take into account all sizes of partitions and reset DECL_RTLs. */ |
1091 | static HOST_WIDE_INT | |
1092 | account_stack_vars (void) | |
1093 | { | |
1094 | size_t si, j, i, n = stack_vars_num; | |
1095 | HOST_WIDE_INT size = 0; | |
1096 | ||
1097 | for (si = 0; si < n; ++si) | |
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 | ||
1105 | size += stack_vars[i].size; | |
1106 | for (j = i; j != EOC; j = stack_vars[j].next) | |
4e3825db | 1107 | set_rtl (stack_vars[j].decl, NULL); |
ff28a94d JH |
1108 | } |
1109 | return size; | |
1110 | } | |
1111 | ||
1f6d3a08 RH |
1112 | /* A subroutine of expand_one_var. Called to immediately assign rtl |
1113 | to a variable to be allocated in the stack frame. */ | |
1114 | ||
1115 | static void | |
0f9f9784 | 1116 | expand_one_stack_var (tree var) |
1f6d3a08 | 1117 | { |
3a42502d RH |
1118 | HOST_WIDE_INT size, offset; |
1119 | unsigned byte_align; | |
1f6d3a08 | 1120 | |
0f9f9784 AO |
1121 | size = tree_to_uhwi (DECL_SIZE_UNIT (SSAVAR (var))); |
1122 | byte_align = align_local_variable (SSAVAR (var)); | |
3a42502d RH |
1123 | |
1124 | /* We handle highly aligned variables in expand_stack_vars. */ | |
1125 | gcc_assert (byte_align * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT); | |
1f6d3a08 | 1126 | |
3a42502d RH |
1127 | offset = alloc_stack_frame_space (size, byte_align); |
1128 | ||
1129 | expand_one_stack_var_at (var, virtual_stack_vars_rtx, | |
1130 | crtl->max_used_stack_slot_alignment, offset); | |
1f6d3a08 RH |
1131 | } |
1132 | ||
1f6d3a08 RH |
1133 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL |
1134 | that will reside in a hard register. */ | |
1135 | ||
1136 | static void | |
1137 | expand_one_hard_reg_var (tree var) | |
1138 | { | |
1139 | rest_of_decl_compilation (var, 0, 0); | |
1140 | } | |
1141 | ||
1142 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL | |
1143 | that will reside in a pseudo register. */ | |
1144 | ||
1145 | static void | |
1146 | expand_one_register_var (tree var) | |
1147 | { | |
0f9f9784 | 1148 | tree decl = SSAVAR (var); |
4e3825db | 1149 | tree type = TREE_TYPE (decl); |
ef4bddc2 | 1150 | machine_mode reg_mode = promote_decl_mode (decl, NULL); |
1f6d3a08 RH |
1151 | rtx x = gen_reg_rtx (reg_mode); |
1152 | ||
4e3825db | 1153 | set_rtl (var, x); |
1f6d3a08 RH |
1154 | |
1155 | /* Note if the object is a user variable. */ | |
4e3825db MM |
1156 | if (!DECL_ARTIFICIAL (decl)) |
1157 | mark_user_reg (x); | |
1f6d3a08 | 1158 | |
61021c2c | 1159 | if (POINTER_TYPE_P (type)) |
d466b407 | 1160 | mark_reg_pointer (x, get_pointer_alignment (var)); |
1f6d3a08 RH |
1161 | } |
1162 | ||
1163 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL that | |
128a79fb | 1164 | has some associated error, e.g. its type is error-mark. We just need |
1f6d3a08 RH |
1165 | to pick something that won't crash the rest of the compiler. */ |
1166 | ||
1167 | static void | |
1168 | expand_one_error_var (tree var) | |
1169 | { | |
ef4bddc2 | 1170 | machine_mode mode = DECL_MODE (var); |
1f6d3a08 RH |
1171 | rtx x; |
1172 | ||
1173 | if (mode == BLKmode) | |
1174 | x = gen_rtx_MEM (BLKmode, const0_rtx); | |
1175 | else if (mode == VOIDmode) | |
1176 | x = const0_rtx; | |
1177 | else | |
1178 | x = gen_reg_rtx (mode); | |
1179 | ||
1180 | SET_DECL_RTL (var, x); | |
1181 | } | |
1182 | ||
c22cacf3 | 1183 | /* A subroutine of expand_one_var. VAR is a variable that will be |
1f6d3a08 RH |
1184 | allocated to the local stack frame. Return true if we wish to |
1185 | add VAR to STACK_VARS so that it will be coalesced with other | |
1186 | variables. Return false to allocate VAR immediately. | |
1187 | ||
1188 | This function is used to reduce the number of variables considered | |
1189 | for coalescing, which reduces the size of the quadratic problem. */ | |
1190 | ||
1191 | static bool | |
1192 | defer_stack_allocation (tree var, bool toplevel) | |
1193 | { | |
ee2e8462 EB |
1194 | /* Whether the variable is small enough for immediate allocation not to be |
1195 | a problem with regard to the frame size. */ | |
1196 | bool smallish | |
7d362f6c | 1197 | = ((HOST_WIDE_INT) tree_to_uhwi (DECL_SIZE_UNIT (var)) |
ee2e8462 EB |
1198 | < PARAM_VALUE (PARAM_MIN_SIZE_FOR_STACK_SHARING)); |
1199 | ||
7d69de61 | 1200 | /* If stack protection is enabled, *all* stack variables must be deferred, |
f3ddd692 JJ |
1201 | so that we can re-order the strings to the top of the frame. |
1202 | Similarly for Address Sanitizer. */ | |
b5ebc991 | 1203 | if (flag_stack_protect || ((flag_sanitize & SANITIZE_ADDRESS) && ASAN_STACK)) |
7d69de61 RH |
1204 | return true; |
1205 | ||
3a42502d RH |
1206 | /* We handle "large" alignment via dynamic allocation. We want to handle |
1207 | this extra complication in only one place, so defer them. */ | |
1208 | if (DECL_ALIGN (var) > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1209 | return true; | |
1210 | ||
ee2e8462 EB |
1211 | /* When optimization is enabled, DECL_IGNORED_P variables originally scoped |
1212 | might be detached from their block and appear at toplevel when we reach | |
1213 | here. We want to coalesce them with variables from other blocks when | |
1214 | the immediate contribution to the frame size would be noticeable. */ | |
1215 | if (toplevel && optimize > 0 && DECL_IGNORED_P (var) && !smallish) | |
1216 | return true; | |
1217 | ||
1218 | /* Variables declared in the outermost scope automatically conflict | |
1219 | with every other variable. The only reason to want to defer them | |
1f6d3a08 RH |
1220 | at all is that, after sorting, we can more efficiently pack |
1221 | small variables in the stack frame. Continue to defer at -O2. */ | |
1222 | if (toplevel && optimize < 2) | |
1223 | return false; | |
1224 | ||
1225 | /* Without optimization, *most* variables are allocated from the | |
1226 | stack, which makes the quadratic problem large exactly when we | |
c22cacf3 | 1227 | want compilation to proceed as quickly as possible. On the |
1f6d3a08 RH |
1228 | other hand, we don't want the function's stack frame size to |
1229 | get completely out of hand. So we avoid adding scalars and | |
1230 | "small" aggregates to the list at all. */ | |
ee2e8462 | 1231 | if (optimize == 0 && smallish) |
1f6d3a08 RH |
1232 | return false; |
1233 | ||
1234 | return true; | |
1235 | } | |
1236 | ||
1237 | /* A subroutine of expand_used_vars. Expand one variable according to | |
2a7e31df | 1238 | its flavor. Variables to be placed on the stack are not actually |
b8698a0f | 1239 | expanded yet, merely recorded. |
ff28a94d JH |
1240 | When REALLY_EXPAND is false, only add stack values to be allocated. |
1241 | Return stack usage this variable is supposed to take. | |
1242 | */ | |
1f6d3a08 | 1243 | |
ff28a94d JH |
1244 | static HOST_WIDE_INT |
1245 | expand_one_var (tree var, bool toplevel, bool really_expand) | |
1f6d3a08 | 1246 | { |
3a42502d | 1247 | unsigned int align = BITS_PER_UNIT; |
4e3825db | 1248 | tree origvar = var; |
3a42502d | 1249 | |
4e3825db MM |
1250 | var = SSAVAR (var); |
1251 | ||
3a42502d | 1252 | if (TREE_TYPE (var) != error_mark_node && TREE_CODE (var) == VAR_DECL) |
2e3f842f | 1253 | { |
2e3f842f L |
1254 | /* Because we don't know if VAR will be in register or on stack, |
1255 | we conservatively assume it will be on stack even if VAR is | |
1256 | eventually put into register after RA pass. For non-automatic | |
1257 | variables, which won't be on stack, we collect alignment of | |
3396aba5 JJ |
1258 | type and ignore user specified alignment. Similarly for |
1259 | SSA_NAMEs for which use_register_for_decl returns true. */ | |
1260 | if (TREE_STATIC (var) | |
1261 | || DECL_EXTERNAL (var) | |
1262 | || (TREE_CODE (origvar) == SSA_NAME && use_register_for_decl (var))) | |
ae58e548 JJ |
1263 | align = MINIMUM_ALIGNMENT (TREE_TYPE (var), |
1264 | TYPE_MODE (TREE_TYPE (var)), | |
1265 | TYPE_ALIGN (TREE_TYPE (var))); | |
f3184b4c JJ |
1266 | else if (DECL_HAS_VALUE_EXPR_P (var) |
1267 | || (DECL_RTL_SET_P (var) && MEM_P (DECL_RTL (var)))) | |
1268 | /* Don't consider debug only variables with DECL_HAS_VALUE_EXPR_P set | |
1269 | or variables which were assigned a stack slot already by | |
1270 | expand_one_stack_var_at - in the latter case DECL_ALIGN has been | |
1271 | changed from the offset chosen to it. */ | |
1272 | align = crtl->stack_alignment_estimated; | |
2e3f842f | 1273 | else |
ae58e548 | 1274 | align = MINIMUM_ALIGNMENT (var, DECL_MODE (var), DECL_ALIGN (var)); |
2e3f842f | 1275 | |
3a42502d RH |
1276 | /* If the variable alignment is very large we'll dynamicaly allocate |
1277 | it, which means that in-frame portion is just a pointer. */ | |
1278 | if (align > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1279 | align = POINTER_SIZE; | |
1280 | } | |
1281 | ||
0f9f9784 AO |
1282 | if (SUPPORTS_STACK_ALIGNMENT |
1283 | && crtl->stack_alignment_estimated < align) | |
1284 | { | |
1285 | /* stack_alignment_estimated shouldn't change after stack | |
1286 | realign decision made */ | |
1287 | gcc_assert (!crtl->stack_realign_processed); | |
1288 | crtl->stack_alignment_estimated = align; | |
1289 | } | |
1290 | ||
1291 | /* stack_alignment_needed > PREFERRED_STACK_BOUNDARY is permitted. | |
1292 | So here we only make sure stack_alignment_needed >= align. */ | |
1293 | if (crtl->stack_alignment_needed < align) | |
1294 | crtl->stack_alignment_needed = align; | |
1295 | if (crtl->max_used_stack_slot_alignment < align) | |
1296 | crtl->max_used_stack_slot_alignment = align; | |
3a42502d | 1297 | |
4e3825db MM |
1298 | if (TREE_CODE (origvar) == SSA_NAME) |
1299 | { | |
1300 | gcc_assert (TREE_CODE (var) != VAR_DECL | |
1301 | || (!DECL_EXTERNAL (var) | |
1302 | && !DECL_HAS_VALUE_EXPR_P (var) | |
1303 | && !TREE_STATIC (var) | |
4e3825db MM |
1304 | && TREE_TYPE (var) != error_mark_node |
1305 | && !DECL_HARD_REGISTER (var) | |
1306 | && really_expand)); | |
1307 | } | |
1308 | if (TREE_CODE (var) != VAR_DECL && TREE_CODE (origvar) != SSA_NAME) | |
4846b435 | 1309 | ; |
1f6d3a08 RH |
1310 | else if (DECL_EXTERNAL (var)) |
1311 | ; | |
833b3afe | 1312 | else if (DECL_HAS_VALUE_EXPR_P (var)) |
1f6d3a08 RH |
1313 | ; |
1314 | else if (TREE_STATIC (var)) | |
7e8b322a | 1315 | ; |
eb7adebc | 1316 | else if (TREE_CODE (origvar) != SSA_NAME && DECL_RTL_SET_P (var)) |
1f6d3a08 RH |
1317 | ; |
1318 | else if (TREE_TYPE (var) == error_mark_node) | |
ff28a94d JH |
1319 | { |
1320 | if (really_expand) | |
1321 | expand_one_error_var (var); | |
1322 | } | |
4e3825db | 1323 | else if (TREE_CODE (var) == VAR_DECL && DECL_HARD_REGISTER (var)) |
ff28a94d JH |
1324 | { |
1325 | if (really_expand) | |
c218f6e8 JM |
1326 | { |
1327 | expand_one_hard_reg_var (var); | |
1328 | if (!DECL_HARD_REGISTER (var)) | |
1329 | /* Invalid register specification. */ | |
1330 | expand_one_error_var (var); | |
1331 | } | |
ff28a94d | 1332 | } |
1f6d3a08 | 1333 | else if (use_register_for_decl (var)) |
ff28a94d JH |
1334 | { |
1335 | if (really_expand) | |
4e3825db | 1336 | expand_one_register_var (origvar); |
ff28a94d | 1337 | } |
56099f00 | 1338 | else if (! valid_constant_size_p (DECL_SIZE_UNIT (var))) |
7604eb4e | 1339 | { |
56099f00 | 1340 | /* Reject variables which cover more than half of the address-space. */ |
7604eb4e JJ |
1341 | if (really_expand) |
1342 | { | |
1343 | error ("size of variable %q+D is too large", var); | |
1344 | expand_one_error_var (var); | |
1345 | } | |
1346 | } | |
1f6d3a08 | 1347 | else if (defer_stack_allocation (var, toplevel)) |
4e3825db | 1348 | add_stack_var (origvar); |
1f6d3a08 | 1349 | else |
ff28a94d | 1350 | { |
bd9f1b4b | 1351 | if (really_expand) |
4e3825db | 1352 | expand_one_stack_var (origvar); |
ae7e9ddd | 1353 | return tree_to_uhwi (DECL_SIZE_UNIT (var)); |
ff28a94d JH |
1354 | } |
1355 | return 0; | |
1f6d3a08 RH |
1356 | } |
1357 | ||
1358 | /* A subroutine of expand_used_vars. Walk down through the BLOCK tree | |
1359 | expanding variables. Those variables that can be put into registers | |
1360 | are allocated pseudos; those that can't are put on the stack. | |
1361 | ||
1362 | TOPLEVEL is true if this is the outermost BLOCK. */ | |
1363 | ||
1364 | static void | |
1365 | expand_used_vars_for_block (tree block, bool toplevel) | |
1366 | { | |
1f6d3a08 RH |
1367 | tree t; |
1368 | ||
1f6d3a08 | 1369 | /* Expand all variables at this level. */ |
910ad8de | 1370 | for (t = BLOCK_VARS (block); t ; t = DECL_CHAIN (t)) |
1ace6185 JJ |
1371 | if (TREE_USED (t) |
1372 | && ((TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != RESULT_DECL) | |
1373 | || !DECL_NONSHAREABLE (t))) | |
ff28a94d | 1374 | expand_one_var (t, toplevel, true); |
1f6d3a08 | 1375 | |
1f6d3a08 RH |
1376 | /* Expand all variables at containing levels. */ |
1377 | for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t)) | |
1378 | expand_used_vars_for_block (t, false); | |
1f6d3a08 RH |
1379 | } |
1380 | ||
1381 | /* A subroutine of expand_used_vars. Walk down through the BLOCK tree | |
1382 | and clear TREE_USED on all local variables. */ | |
1383 | ||
1384 | static void | |
1385 | clear_tree_used (tree block) | |
1386 | { | |
1387 | tree t; | |
1388 | ||
910ad8de | 1389 | for (t = BLOCK_VARS (block); t ; t = DECL_CHAIN (t)) |
1f6d3a08 | 1390 | /* if (!TREE_STATIC (t) && !DECL_EXTERNAL (t)) */ |
1ace6185 JJ |
1391 | if ((TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != RESULT_DECL) |
1392 | || !DECL_NONSHAREABLE (t)) | |
1f6d3a08 RH |
1393 | TREE_USED (t) = 0; |
1394 | ||
1395 | for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t)) | |
1396 | clear_tree_used (t); | |
1397 | } | |
1398 | ||
f6bc1c4a HS |
1399 | enum { |
1400 | SPCT_FLAG_DEFAULT = 1, | |
1401 | SPCT_FLAG_ALL = 2, | |
5434dc07 MD |
1402 | SPCT_FLAG_STRONG = 3, |
1403 | SPCT_FLAG_EXPLICIT = 4 | |
f6bc1c4a HS |
1404 | }; |
1405 | ||
7d69de61 RH |
1406 | /* Examine TYPE and determine a bit mask of the following features. */ |
1407 | ||
1408 | #define SPCT_HAS_LARGE_CHAR_ARRAY 1 | |
1409 | #define SPCT_HAS_SMALL_CHAR_ARRAY 2 | |
1410 | #define SPCT_HAS_ARRAY 4 | |
1411 | #define SPCT_HAS_AGGREGATE 8 | |
1412 | ||
1413 | static unsigned int | |
1414 | stack_protect_classify_type (tree type) | |
1415 | { | |
1416 | unsigned int ret = 0; | |
1417 | tree t; | |
1418 | ||
1419 | switch (TREE_CODE (type)) | |
1420 | { | |
1421 | case ARRAY_TYPE: | |
1422 | t = TYPE_MAIN_VARIANT (TREE_TYPE (type)); | |
1423 | if (t == char_type_node | |
1424 | || t == signed_char_type_node | |
1425 | || t == unsigned_char_type_node) | |
1426 | { | |
15362b89 JJ |
1427 | unsigned HOST_WIDE_INT max = PARAM_VALUE (PARAM_SSP_BUFFER_SIZE); |
1428 | unsigned HOST_WIDE_INT len; | |
7d69de61 | 1429 | |
15362b89 | 1430 | if (!TYPE_SIZE_UNIT (type) |
cc269bb6 | 1431 | || !tree_fits_uhwi_p (TYPE_SIZE_UNIT (type))) |
15362b89 | 1432 | len = max; |
7d69de61 | 1433 | else |
ae7e9ddd | 1434 | len = tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
7d69de61 RH |
1435 | |
1436 | if (len < max) | |
1437 | ret = SPCT_HAS_SMALL_CHAR_ARRAY | SPCT_HAS_ARRAY; | |
1438 | else | |
1439 | ret = SPCT_HAS_LARGE_CHAR_ARRAY | SPCT_HAS_ARRAY; | |
1440 | } | |
1441 | else | |
1442 | ret = SPCT_HAS_ARRAY; | |
1443 | break; | |
1444 | ||
1445 | case UNION_TYPE: | |
1446 | case QUAL_UNION_TYPE: | |
1447 | case RECORD_TYPE: | |
1448 | ret = SPCT_HAS_AGGREGATE; | |
1449 | for (t = TYPE_FIELDS (type); t ; t = TREE_CHAIN (t)) | |
1450 | if (TREE_CODE (t) == FIELD_DECL) | |
1451 | ret |= stack_protect_classify_type (TREE_TYPE (t)); | |
1452 | break; | |
1453 | ||
1454 | default: | |
1455 | break; | |
1456 | } | |
1457 | ||
1458 | return ret; | |
1459 | } | |
1460 | ||
a4d05547 KH |
1461 | /* Return nonzero if DECL should be segregated into the "vulnerable" upper |
1462 | part of the local stack frame. Remember if we ever return nonzero for | |
7d69de61 RH |
1463 | any variable in this function. The return value is the phase number in |
1464 | which the variable should be allocated. */ | |
1465 | ||
1466 | static int | |
1467 | stack_protect_decl_phase (tree decl) | |
1468 | { | |
1469 | unsigned int bits = stack_protect_classify_type (TREE_TYPE (decl)); | |
1470 | int ret = 0; | |
1471 | ||
1472 | if (bits & SPCT_HAS_SMALL_CHAR_ARRAY) | |
1473 | has_short_buffer = true; | |
1474 | ||
f6bc1c4a | 1475 | if (flag_stack_protect == SPCT_FLAG_ALL |
5434dc07 MD |
1476 | || flag_stack_protect == SPCT_FLAG_STRONG |
1477 | || (flag_stack_protect == SPCT_FLAG_EXPLICIT | |
1478 | && lookup_attribute ("stack_protect", | |
1479 | DECL_ATTRIBUTES (current_function_decl)))) | |
7d69de61 RH |
1480 | { |
1481 | if ((bits & (SPCT_HAS_SMALL_CHAR_ARRAY | SPCT_HAS_LARGE_CHAR_ARRAY)) | |
1482 | && !(bits & SPCT_HAS_AGGREGATE)) | |
1483 | ret = 1; | |
1484 | else if (bits & SPCT_HAS_ARRAY) | |
1485 | ret = 2; | |
1486 | } | |
1487 | else | |
1488 | ret = (bits & SPCT_HAS_LARGE_CHAR_ARRAY) != 0; | |
1489 | ||
1490 | if (ret) | |
1491 | has_protected_decls = true; | |
1492 | ||
1493 | return ret; | |
1494 | } | |
1495 | ||
1496 | /* Two helper routines that check for phase 1 and phase 2. These are used | |
1497 | as callbacks for expand_stack_vars. */ | |
1498 | ||
1499 | static bool | |
f3ddd692 JJ |
1500 | stack_protect_decl_phase_1 (size_t i) |
1501 | { | |
1502 | return stack_protect_decl_phase (stack_vars[i].decl) == 1; | |
1503 | } | |
1504 | ||
1505 | static bool | |
1506 | stack_protect_decl_phase_2 (size_t i) | |
7d69de61 | 1507 | { |
f3ddd692 | 1508 | return stack_protect_decl_phase (stack_vars[i].decl) == 2; |
7d69de61 RH |
1509 | } |
1510 | ||
f3ddd692 JJ |
1511 | /* And helper function that checks for asan phase (with stack protector |
1512 | it is phase 3). This is used as callback for expand_stack_vars. | |
1513 | Returns true if any of the vars in the partition need to be protected. */ | |
1514 | ||
7d69de61 | 1515 | static bool |
f3ddd692 | 1516 | asan_decl_phase_3 (size_t i) |
7d69de61 | 1517 | { |
f3ddd692 JJ |
1518 | while (i != EOC) |
1519 | { | |
1520 | if (asan_protect_stack_decl (stack_vars[i].decl)) | |
1521 | return true; | |
1522 | i = stack_vars[i].next; | |
1523 | } | |
1524 | return false; | |
7d69de61 RH |
1525 | } |
1526 | ||
1527 | /* Ensure that variables in different stack protection phases conflict | |
1528 | so that they are not merged and share the same stack slot. */ | |
1529 | ||
1530 | static void | |
1531 | add_stack_protection_conflicts (void) | |
1532 | { | |
1533 | size_t i, j, n = stack_vars_num; | |
1534 | unsigned char *phase; | |
1535 | ||
1536 | phase = XNEWVEC (unsigned char, n); | |
1537 | for (i = 0; i < n; ++i) | |
1538 | phase[i] = stack_protect_decl_phase (stack_vars[i].decl); | |
1539 | ||
1540 | for (i = 0; i < n; ++i) | |
1541 | { | |
1542 | unsigned char ph_i = phase[i]; | |
9b44f5d9 | 1543 | for (j = i + 1; j < n; ++j) |
7d69de61 RH |
1544 | if (ph_i != phase[j]) |
1545 | add_stack_var_conflict (i, j); | |
1546 | } | |
1547 | ||
1548 | XDELETEVEC (phase); | |
1549 | } | |
1550 | ||
1551 | /* Create a decl for the guard at the top of the stack frame. */ | |
1552 | ||
1553 | static void | |
1554 | create_stack_guard (void) | |
1555 | { | |
c2255bc4 AH |
1556 | tree guard = build_decl (DECL_SOURCE_LOCATION (current_function_decl), |
1557 | VAR_DECL, NULL, ptr_type_node); | |
7d69de61 RH |
1558 | TREE_THIS_VOLATILE (guard) = 1; |
1559 | TREE_USED (guard) = 1; | |
1560 | expand_one_stack_var (guard); | |
cb91fab0 | 1561 | crtl->stack_protect_guard = guard; |
7d69de61 RH |
1562 | } |
1563 | ||
ff28a94d | 1564 | /* Prepare for expanding variables. */ |
b8698a0f | 1565 | static void |
ff28a94d JH |
1566 | init_vars_expansion (void) |
1567 | { | |
3f9b14ff SB |
1568 | /* Conflict bitmaps, and a few related temporary bitmaps, go here. */ |
1569 | bitmap_obstack_initialize (&stack_var_bitmap_obstack); | |
ff28a94d | 1570 | |
3f9b14ff | 1571 | /* A map from decl to stack partition. */ |
39c8aaa4 | 1572 | decl_to_stack_part = new hash_map<tree, size_t>; |
ff28a94d JH |
1573 | |
1574 | /* Initialize local stack smashing state. */ | |
1575 | has_protected_decls = false; | |
1576 | has_short_buffer = false; | |
1577 | } | |
1578 | ||
1579 | /* Free up stack variable graph data. */ | |
1580 | static void | |
1581 | fini_vars_expansion (void) | |
1582 | { | |
3f9b14ff SB |
1583 | bitmap_obstack_release (&stack_var_bitmap_obstack); |
1584 | if (stack_vars) | |
1585 | XDELETEVEC (stack_vars); | |
1586 | if (stack_vars_sorted) | |
1587 | XDELETEVEC (stack_vars_sorted); | |
ff28a94d | 1588 | stack_vars = NULL; |
9b44f5d9 | 1589 | stack_vars_sorted = NULL; |
ff28a94d | 1590 | stack_vars_alloc = stack_vars_num = 0; |
39c8aaa4 | 1591 | delete decl_to_stack_part; |
47598145 | 1592 | decl_to_stack_part = NULL; |
ff28a94d JH |
1593 | } |
1594 | ||
30925d94 AO |
1595 | /* Make a fair guess for the size of the stack frame of the function |
1596 | in NODE. This doesn't have to be exact, the result is only used in | |
1597 | the inline heuristics. So we don't want to run the full stack var | |
1598 | packing algorithm (which is quadratic in the number of stack vars). | |
1599 | Instead, we calculate the total size of all stack vars. This turns | |
1600 | out to be a pretty fair estimate -- packing of stack vars doesn't | |
1601 | happen very often. */ | |
b5a430f3 | 1602 | |
ff28a94d | 1603 | HOST_WIDE_INT |
30925d94 | 1604 | estimated_stack_frame_size (struct cgraph_node *node) |
ff28a94d JH |
1605 | { |
1606 | HOST_WIDE_INT size = 0; | |
b5a430f3 | 1607 | size_t i; |
bb7e6d55 | 1608 | tree var; |
67348ccc | 1609 | struct function *fn = DECL_STRUCT_FUNCTION (node->decl); |
30925d94 | 1610 | |
bb7e6d55 | 1611 | push_cfun (fn); |
ff28a94d | 1612 | |
3f9b14ff SB |
1613 | init_vars_expansion (); |
1614 | ||
824f71b9 RG |
1615 | FOR_EACH_LOCAL_DECL (fn, i, var) |
1616 | if (auto_var_in_fn_p (var, fn->decl)) | |
1617 | size += expand_one_var (var, true, false); | |
b5a430f3 | 1618 | |
ff28a94d JH |
1619 | if (stack_vars_num > 0) |
1620 | { | |
b5a430f3 SB |
1621 | /* Fake sorting the stack vars for account_stack_vars (). */ |
1622 | stack_vars_sorted = XNEWVEC (size_t, stack_vars_num); | |
1623 | for (i = 0; i < stack_vars_num; ++i) | |
1624 | stack_vars_sorted[i] = i; | |
ff28a94d | 1625 | size += account_stack_vars (); |
ff28a94d | 1626 | } |
3f9b14ff SB |
1627 | |
1628 | fini_vars_expansion (); | |
2e1ec94f | 1629 | pop_cfun (); |
ff28a94d JH |
1630 | return size; |
1631 | } | |
1632 | ||
f6bc1c4a HS |
1633 | /* Helper routine to check if a record or union contains an array field. */ |
1634 | ||
1635 | static int | |
1636 | record_or_union_type_has_array_p (const_tree tree_type) | |
1637 | { | |
1638 | tree fields = TYPE_FIELDS (tree_type); | |
1639 | tree f; | |
1640 | ||
1641 | for (f = fields; f; f = DECL_CHAIN (f)) | |
1642 | if (TREE_CODE (f) == FIELD_DECL) | |
1643 | { | |
1644 | tree field_type = TREE_TYPE (f); | |
1645 | if (RECORD_OR_UNION_TYPE_P (field_type) | |
1646 | && record_or_union_type_has_array_p (field_type)) | |
1647 | return 1; | |
1648 | if (TREE_CODE (field_type) == ARRAY_TYPE) | |
1649 | return 1; | |
1650 | } | |
1651 | return 0; | |
1652 | } | |
1653 | ||
6545746e FW |
1654 | /* Check if the current function has local referenced variables that |
1655 | have their addresses taken, contain an array, or are arrays. */ | |
1656 | ||
1657 | static bool | |
1658 | stack_protect_decl_p () | |
1659 | { | |
1660 | unsigned i; | |
1661 | tree var; | |
1662 | ||
1663 | FOR_EACH_LOCAL_DECL (cfun, i, var) | |
1664 | if (!is_global_var (var)) | |
1665 | { | |
1666 | tree var_type = TREE_TYPE (var); | |
1667 | if (TREE_CODE (var) == VAR_DECL | |
1668 | && (TREE_CODE (var_type) == ARRAY_TYPE | |
1669 | || TREE_ADDRESSABLE (var) | |
1670 | || (RECORD_OR_UNION_TYPE_P (var_type) | |
1671 | && record_or_union_type_has_array_p (var_type)))) | |
1672 | return true; | |
1673 | } | |
1674 | return false; | |
1675 | } | |
1676 | ||
1677 | /* Check if the current function has calls that use a return slot. */ | |
1678 | ||
1679 | static bool | |
1680 | stack_protect_return_slot_p () | |
1681 | { | |
1682 | basic_block bb; | |
1683 | ||
1684 | FOR_ALL_BB_FN (bb, cfun) | |
1685 | for (gimple_stmt_iterator gsi = gsi_start_bb (bb); | |
1686 | !gsi_end_p (gsi); gsi_next (&gsi)) | |
1687 | { | |
1688 | gimple stmt = gsi_stmt (gsi); | |
1689 | /* This assumes that calls to internal-only functions never | |
1690 | use a return slot. */ | |
1691 | if (is_gimple_call (stmt) | |
1692 | && !gimple_call_internal_p (stmt) | |
1693 | && aggregate_value_p (TREE_TYPE (gimple_call_fntype (stmt)), | |
1694 | gimple_call_fndecl (stmt))) | |
1695 | return true; | |
1696 | } | |
1697 | return false; | |
1698 | } | |
1699 | ||
1f6d3a08 | 1700 | /* Expand all variables used in the function. */ |
727a31fa | 1701 | |
b47aae36 | 1702 | static rtx_insn * |
727a31fa RH |
1703 | expand_used_vars (void) |
1704 | { | |
c021f10b | 1705 | tree var, outer_block = DECL_INITIAL (current_function_decl); |
6e1aa848 | 1706 | vec<tree> maybe_local_decls = vNULL; |
b47aae36 | 1707 | rtx_insn *var_end_seq = NULL; |
4e3825db | 1708 | unsigned i; |
c021f10b | 1709 | unsigned len; |
f6bc1c4a | 1710 | bool gen_stack_protect_signal = false; |
727a31fa | 1711 | |
1f6d3a08 RH |
1712 | /* Compute the phase of the stack frame for this function. */ |
1713 | { | |
1714 | int align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT; | |
1715 | int off = STARTING_FRAME_OFFSET % align; | |
1716 | frame_phase = off ? align - off : 0; | |
1717 | } | |
727a31fa | 1718 | |
3f9b14ff SB |
1719 | /* Set TREE_USED on all variables in the local_decls. */ |
1720 | FOR_EACH_LOCAL_DECL (cfun, i, var) | |
1721 | TREE_USED (var) = 1; | |
1722 | /* Clear TREE_USED on all variables associated with a block scope. */ | |
1723 | clear_tree_used (DECL_INITIAL (current_function_decl)); | |
1724 | ||
ff28a94d | 1725 | init_vars_expansion (); |
7d69de61 | 1726 | |
8f51aa6b IZ |
1727 | if (targetm.use_pseudo_pic_reg ()) |
1728 | pic_offset_table_rtx = gen_reg_rtx (Pmode); | |
1729 | ||
0f9f9784 | 1730 | hash_map<tree, tree> ssa_name_decls; |
4e3825db MM |
1731 | for (i = 0; i < SA.map->num_partitions; i++) |
1732 | { | |
1733 | tree var = partition_to_var (SA.map, i); | |
1734 | ||
ea057359 | 1735 | gcc_assert (!virtual_operand_p (var)); |
70b5e7dc | 1736 | |
0f9f9784 AO |
1737 | /* Assign decls to each SSA name partition, share decls for partitions |
1738 | we could have coalesced (those with the same type). */ | |
1739 | if (SSA_NAME_VAR (var) == NULL_TREE) | |
1740 | { | |
1741 | tree *slot = &ssa_name_decls.get_or_insert (TREE_TYPE (var)); | |
1742 | if (!*slot) | |
1743 | *slot = create_tmp_reg (TREE_TYPE (var)); | |
1744 | replace_ssa_name_symbol (var, *slot); | |
1745 | } | |
4e3825db | 1746 | |
0f9f9784 AO |
1747 | /* Always allocate space for partitions based on VAR_DECLs. But for |
1748 | those based on PARM_DECLs or RESULT_DECLs and which matter for the | |
1749 | debug info, there is no need to do so if optimization is disabled | |
1750 | because all the SSA_NAMEs based on these DECLs have been coalesced | |
1751 | into a single partition, which is thus assigned the canonical RTL | |
1752 | location of the DECLs. If in_lto_p, we can't rely on optimize, | |
1753 | a function could be compiled with -O1 -flto first and only the | |
1754 | link performed at -O0. */ | |
1755 | if (TREE_CODE (SSA_NAME_VAR (var)) == VAR_DECL) | |
1756 | expand_one_var (var, true, true); | |
1757 | else if (DECL_IGNORED_P (SSA_NAME_VAR (var)) || optimize || in_lto_p) | |
1758 | { | |
1759 | /* This is a PARM_DECL or RESULT_DECL. For those partitions that | |
1760 | contain the default def (representing the parm or result itself) | |
1761 | we don't do anything here. But those which don't contain the | |
1762 | default def (representing a temporary based on the parm/result) | |
1763 | we need to allocate space just like for normal VAR_DECLs. */ | |
1764 | if (!bitmap_bit_p (SA.partition_has_default_def, i)) | |
1765 | { | |
1766 | expand_one_var (var, true, true); | |
1767 | gcc_assert (SA.partition_to_pseudo[i]); | |
1768 | } | |
1769 | } | |
1770 | } | |
7b337d20 | 1771 | |
f6bc1c4a | 1772 | if (flag_stack_protect == SPCT_FLAG_STRONG) |
6545746e FW |
1773 | gen_stack_protect_signal |
1774 | = stack_protect_decl_p () || stack_protect_return_slot_p (); | |
f6bc1c4a | 1775 | |
cb91fab0 | 1776 | /* At this point all variables on the local_decls with TREE_USED |
1f6d3a08 | 1777 | set are not associated with any block scope. Lay them out. */ |
c021f10b | 1778 | |
9771b263 | 1779 | len = vec_safe_length (cfun->local_decls); |
c021f10b | 1780 | FOR_EACH_LOCAL_DECL (cfun, i, var) |
1f6d3a08 | 1781 | { |
1f6d3a08 RH |
1782 | bool expand_now = false; |
1783 | ||
4e3825db MM |
1784 | /* Expanded above already. */ |
1785 | if (is_gimple_reg (var)) | |
eb7adebc MM |
1786 | { |
1787 | TREE_USED (var) = 0; | |
3adcf52c | 1788 | goto next; |
eb7adebc | 1789 | } |
1f6d3a08 RH |
1790 | /* We didn't set a block for static or extern because it's hard |
1791 | to tell the difference between a global variable (re)declared | |
1792 | in a local scope, and one that's really declared there to | |
1793 | begin with. And it doesn't really matter much, since we're | |
1794 | not giving them stack space. Expand them now. */ | |
4e3825db | 1795 | else if (TREE_STATIC (var) || DECL_EXTERNAL (var)) |
1f6d3a08 RH |
1796 | expand_now = true; |
1797 | ||
ee2e8462 EB |
1798 | /* Expand variables not associated with any block now. Those created by |
1799 | the optimizers could be live anywhere in the function. Those that | |
1800 | could possibly have been scoped originally and detached from their | |
1801 | block will have their allocation deferred so we coalesce them with | |
1802 | others when optimization is enabled. */ | |
1f6d3a08 RH |
1803 | else if (TREE_USED (var)) |
1804 | expand_now = true; | |
1805 | ||
1806 | /* Finally, mark all variables on the list as used. We'll use | |
1807 | this in a moment when we expand those associated with scopes. */ | |
1808 | TREE_USED (var) = 1; | |
1809 | ||
1810 | if (expand_now) | |
3adcf52c JM |
1811 | expand_one_var (var, true, true); |
1812 | ||
1813 | next: | |
1814 | if (DECL_ARTIFICIAL (var) && !DECL_IGNORED_P (var)) | |
802e9f8e | 1815 | { |
3adcf52c JM |
1816 | rtx rtl = DECL_RTL_IF_SET (var); |
1817 | ||
1818 | /* Keep artificial non-ignored vars in cfun->local_decls | |
1819 | chain until instantiate_decls. */ | |
1820 | if (rtl && (MEM_P (rtl) || GET_CODE (rtl) == CONCAT)) | |
c021f10b | 1821 | add_local_decl (cfun, var); |
6c6366f6 | 1822 | else if (rtl == NULL_RTX) |
c021f10b NF |
1823 | /* If rtl isn't set yet, which can happen e.g. with |
1824 | -fstack-protector, retry before returning from this | |
1825 | function. */ | |
9771b263 | 1826 | maybe_local_decls.safe_push (var); |
802e9f8e | 1827 | } |
1f6d3a08 | 1828 | } |
1f6d3a08 | 1829 | |
c021f10b NF |
1830 | /* We duplicated some of the decls in CFUN->LOCAL_DECLS. |
1831 | ||
1832 | +-----------------+-----------------+ | |
1833 | | ...processed... | ...duplicates...| | |
1834 | +-----------------+-----------------+ | |
1835 | ^ | |
1836 | +-- LEN points here. | |
1837 | ||
1838 | We just want the duplicates, as those are the artificial | |
1839 | non-ignored vars that we want to keep until instantiate_decls. | |
1840 | Move them down and truncate the array. */ | |
9771b263 DN |
1841 | if (!vec_safe_is_empty (cfun->local_decls)) |
1842 | cfun->local_decls->block_remove (0, len); | |
c021f10b | 1843 | |
1f6d3a08 RH |
1844 | /* At this point, all variables within the block tree with TREE_USED |
1845 | set are actually used by the optimized function. Lay them out. */ | |
1846 | expand_used_vars_for_block (outer_block, true); | |
1847 | ||
1848 | if (stack_vars_num > 0) | |
1849 | { | |
47598145 | 1850 | add_scope_conflicts (); |
1f6d3a08 | 1851 | |
c22cacf3 | 1852 | /* If stack protection is enabled, we don't share space between |
7d69de61 | 1853 | vulnerable data and non-vulnerable data. */ |
5434dc07 MD |
1854 | if (flag_stack_protect != 0 |
1855 | && (flag_stack_protect != SPCT_FLAG_EXPLICIT | |
1856 | || (flag_stack_protect == SPCT_FLAG_EXPLICIT | |
1857 | && lookup_attribute ("stack_protect", | |
1858 | DECL_ATTRIBUTES (current_function_decl))))) | |
7d69de61 RH |
1859 | add_stack_protection_conflicts (); |
1860 | ||
c22cacf3 | 1861 | /* Now that we have collected all stack variables, and have computed a |
1f6d3a08 RH |
1862 | minimal interference graph, attempt to save some stack space. */ |
1863 | partition_stack_vars (); | |
1864 | if (dump_file) | |
1865 | dump_stack_var_partition (); | |
7d69de61 RH |
1866 | } |
1867 | ||
f6bc1c4a HS |
1868 | switch (flag_stack_protect) |
1869 | { | |
1870 | case SPCT_FLAG_ALL: | |
1871 | create_stack_guard (); | |
1872 | break; | |
1873 | ||
1874 | case SPCT_FLAG_STRONG: | |
1875 | if (gen_stack_protect_signal | |
5434dc07 MD |
1876 | || cfun->calls_alloca || has_protected_decls |
1877 | || lookup_attribute ("stack_protect", | |
1878 | DECL_ATTRIBUTES (current_function_decl))) | |
f6bc1c4a HS |
1879 | create_stack_guard (); |
1880 | break; | |
1881 | ||
1882 | case SPCT_FLAG_DEFAULT: | |
5434dc07 MD |
1883 | if (cfun->calls_alloca || has_protected_decls |
1884 | || lookup_attribute ("stack_protect", | |
1885 | DECL_ATTRIBUTES (current_function_decl))) | |
c3284718 | 1886 | create_stack_guard (); |
f6bc1c4a HS |
1887 | break; |
1888 | ||
5434dc07 MD |
1889 | case SPCT_FLAG_EXPLICIT: |
1890 | if (lookup_attribute ("stack_protect", | |
1891 | DECL_ATTRIBUTES (current_function_decl))) | |
1892 | create_stack_guard (); | |
1893 | break; | |
f6bc1c4a HS |
1894 | default: |
1895 | ; | |
1896 | } | |
1f6d3a08 | 1897 | |
7d69de61 RH |
1898 | /* Assign rtl to each variable based on these partitions. */ |
1899 | if (stack_vars_num > 0) | |
1900 | { | |
f3ddd692 JJ |
1901 | struct stack_vars_data data; |
1902 | ||
6e1aa848 DN |
1903 | data.asan_vec = vNULL; |
1904 | data.asan_decl_vec = vNULL; | |
e361382f JJ |
1905 | data.asan_base = NULL_RTX; |
1906 | data.asan_alignb = 0; | |
f3ddd692 | 1907 | |
7d69de61 RH |
1908 | /* Reorder decls to be protected by iterating over the variables |
1909 | array multiple times, and allocating out of each phase in turn. */ | |
c22cacf3 | 1910 | /* ??? We could probably integrate this into the qsort we did |
7d69de61 RH |
1911 | earlier, such that we naturally see these variables first, |
1912 | and thus naturally allocate things in the right order. */ | |
1913 | if (has_protected_decls) | |
1914 | { | |
1915 | /* Phase 1 contains only character arrays. */ | |
f3ddd692 | 1916 | expand_stack_vars (stack_protect_decl_phase_1, &data); |
7d69de61 RH |
1917 | |
1918 | /* Phase 2 contains other kinds of arrays. */ | |
5434dc07 MD |
1919 | if (flag_stack_protect == SPCT_FLAG_ALL |
1920 | || flag_stack_protect == SPCT_FLAG_STRONG | |
1921 | || (flag_stack_protect == SPCT_FLAG_EXPLICIT | |
1922 | && lookup_attribute ("stack_protect", | |
1923 | DECL_ATTRIBUTES (current_function_decl)))) | |
f3ddd692 | 1924 | expand_stack_vars (stack_protect_decl_phase_2, &data); |
7d69de61 RH |
1925 | } |
1926 | ||
b5ebc991 | 1927 | if ((flag_sanitize & SANITIZE_ADDRESS) && ASAN_STACK) |
f3ddd692 JJ |
1928 | /* Phase 3, any partitions that need asan protection |
1929 | in addition to phase 1 and 2. */ | |
1930 | expand_stack_vars (asan_decl_phase_3, &data); | |
1931 | ||
9771b263 | 1932 | if (!data.asan_vec.is_empty ()) |
f3ddd692 JJ |
1933 | { |
1934 | HOST_WIDE_INT prev_offset = frame_offset; | |
e361382f JJ |
1935 | HOST_WIDE_INT offset, sz, redzonesz; |
1936 | redzonesz = ASAN_RED_ZONE_SIZE; | |
1937 | sz = data.asan_vec[0] - prev_offset; | |
1938 | if (data.asan_alignb > ASAN_RED_ZONE_SIZE | |
1939 | && data.asan_alignb <= 4096 | |
3dc87cc0 | 1940 | && sz + ASAN_RED_ZONE_SIZE >= (int) data.asan_alignb) |
e361382f JJ |
1941 | redzonesz = ((sz + ASAN_RED_ZONE_SIZE + data.asan_alignb - 1) |
1942 | & ~(data.asan_alignb - HOST_WIDE_INT_1)) - sz; | |
1943 | offset | |
1944 | = alloc_stack_frame_space (redzonesz, ASAN_RED_ZONE_SIZE); | |
9771b263 DN |
1945 | data.asan_vec.safe_push (prev_offset); |
1946 | data.asan_vec.safe_push (offset); | |
e5dcd695 LZ |
1947 | /* Leave space for alignment if STRICT_ALIGNMENT. */ |
1948 | if (STRICT_ALIGNMENT) | |
1949 | alloc_stack_frame_space ((GET_MODE_ALIGNMENT (SImode) | |
1950 | << ASAN_SHADOW_SHIFT) | |
1951 | / BITS_PER_UNIT, 1); | |
f3ddd692 JJ |
1952 | |
1953 | var_end_seq | |
1954 | = asan_emit_stack_protection (virtual_stack_vars_rtx, | |
e361382f JJ |
1955 | data.asan_base, |
1956 | data.asan_alignb, | |
9771b263 | 1957 | data.asan_vec.address (), |
e361382f | 1958 | data.asan_decl_vec.address (), |
9771b263 | 1959 | data.asan_vec.length ()); |
f3ddd692 JJ |
1960 | } |
1961 | ||
1962 | expand_stack_vars (NULL, &data); | |
1963 | ||
9771b263 DN |
1964 | data.asan_vec.release (); |
1965 | data.asan_decl_vec.release (); | |
1f6d3a08 RH |
1966 | } |
1967 | ||
3f9b14ff SB |
1968 | fini_vars_expansion (); |
1969 | ||
6c6366f6 JJ |
1970 | /* If there were any artificial non-ignored vars without rtl |
1971 | found earlier, see if deferred stack allocation hasn't assigned | |
1972 | rtl to them. */ | |
9771b263 | 1973 | FOR_EACH_VEC_ELT_REVERSE (maybe_local_decls, i, var) |
6c6366f6 | 1974 | { |
6c6366f6 JJ |
1975 | rtx rtl = DECL_RTL_IF_SET (var); |
1976 | ||
6c6366f6 JJ |
1977 | /* Keep artificial non-ignored vars in cfun->local_decls |
1978 | chain until instantiate_decls. */ | |
1979 | if (rtl && (MEM_P (rtl) || GET_CODE (rtl) == CONCAT)) | |
c021f10b | 1980 | add_local_decl (cfun, var); |
6c6366f6 | 1981 | } |
9771b263 | 1982 | maybe_local_decls.release (); |
6c6366f6 | 1983 | |
1f6d3a08 RH |
1984 | /* If the target requires that FRAME_OFFSET be aligned, do it. */ |
1985 | if (STACK_ALIGNMENT_NEEDED) | |
1986 | { | |
1987 | HOST_WIDE_INT align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT; | |
1988 | if (!FRAME_GROWS_DOWNWARD) | |
1989 | frame_offset += align - 1; | |
1990 | frame_offset &= -align; | |
1991 | } | |
f3ddd692 JJ |
1992 | |
1993 | return var_end_seq; | |
727a31fa RH |
1994 | } |
1995 | ||
1996 | ||
b7211528 SB |
1997 | /* If we need to produce a detailed dump, print the tree representation |
1998 | for STMT to the dump file. SINCE is the last RTX after which the RTL | |
1999 | generated for STMT should have been appended. */ | |
2000 | ||
2001 | static void | |
b47aae36 | 2002 | maybe_dump_rtl_for_gimple_stmt (gimple stmt, rtx_insn *since) |
b7211528 SB |
2003 | { |
2004 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
2005 | { | |
2006 | fprintf (dump_file, "\n;; "); | |
b5b8b0ac AO |
2007 | print_gimple_stmt (dump_file, stmt, 0, |
2008 | TDF_SLIM | (dump_flags & TDF_LINENO)); | |
b7211528 SB |
2009 | fprintf (dump_file, "\n"); |
2010 | ||
2011 | print_rtl (dump_file, since ? NEXT_INSN (since) : since); | |
2012 | } | |
2013 | } | |
2014 | ||
8b11009b ZD |
2015 | /* Maps the blocks that do not contain tree labels to rtx labels. */ |
2016 | ||
134aa83c | 2017 | static hash_map<basic_block, rtx_code_label *> *lab_rtx_for_bb; |
8b11009b | 2018 | |
a9b77cd1 ZD |
2019 | /* Returns the label_rtx expression for a label starting basic block BB. */ |
2020 | ||
1476d1bd | 2021 | static rtx_code_label * |
726a989a | 2022 | label_rtx_for_bb (basic_block bb ATTRIBUTE_UNUSED) |
a9b77cd1 | 2023 | { |
726a989a RB |
2024 | gimple_stmt_iterator gsi; |
2025 | tree lab; | |
a9b77cd1 ZD |
2026 | |
2027 | if (bb->flags & BB_RTL) | |
2028 | return block_label (bb); | |
2029 | ||
134aa83c | 2030 | rtx_code_label **elt = lab_rtx_for_bb->get (bb); |
8b11009b | 2031 | if (elt) |
39c8aaa4 | 2032 | return *elt; |
8b11009b ZD |
2033 | |
2034 | /* Find the tree label if it is present. */ | |
b8698a0f | 2035 | |
726a989a | 2036 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
a9b77cd1 | 2037 | { |
538dd0b7 DM |
2038 | glabel *lab_stmt; |
2039 | ||
2040 | lab_stmt = dyn_cast <glabel *> (gsi_stmt (gsi)); | |
2041 | if (!lab_stmt) | |
a9b77cd1 ZD |
2042 | break; |
2043 | ||
726a989a | 2044 | lab = gimple_label_label (lab_stmt); |
a9b77cd1 ZD |
2045 | if (DECL_NONLOCAL (lab)) |
2046 | break; | |
2047 | ||
1476d1bd | 2048 | return jump_target_rtx (lab); |
a9b77cd1 ZD |
2049 | } |
2050 | ||
19f8b229 | 2051 | rtx_code_label *l = gen_label_rtx (); |
39c8aaa4 TS |
2052 | lab_rtx_for_bb->put (bb, l); |
2053 | return l; | |
a9b77cd1 ZD |
2054 | } |
2055 | ||
726a989a | 2056 | |
529ff441 MM |
2057 | /* A subroutine of expand_gimple_cond. Given E, a fallthrough edge |
2058 | of a basic block where we just expanded the conditional at the end, | |
315adeda MM |
2059 | possibly clean up the CFG and instruction sequence. LAST is the |
2060 | last instruction before the just emitted jump sequence. */ | |
529ff441 MM |
2061 | |
2062 | static void | |
b47aae36 | 2063 | maybe_cleanup_end_of_block (edge e, rtx_insn *last) |
529ff441 MM |
2064 | { |
2065 | /* Special case: when jumpif decides that the condition is | |
2066 | trivial it emits an unconditional jump (and the necessary | |
2067 | barrier). But we still have two edges, the fallthru one is | |
2068 | wrong. purge_dead_edges would clean this up later. Unfortunately | |
2069 | we have to insert insns (and split edges) before | |
2070 | find_many_sub_basic_blocks and hence before purge_dead_edges. | |
2071 | But splitting edges might create new blocks which depend on the | |
2072 | fact that if there are two edges there's no barrier. So the | |
2073 | barrier would get lost and verify_flow_info would ICE. Instead | |
2074 | of auditing all edge splitters to care for the barrier (which | |
2075 | normally isn't there in a cleaned CFG), fix it here. */ | |
2076 | if (BARRIER_P (get_last_insn ())) | |
2077 | { | |
b47aae36 | 2078 | rtx_insn *insn; |
529ff441 MM |
2079 | remove_edge (e); |
2080 | /* Now, we have a single successor block, if we have insns to | |
2081 | insert on the remaining edge we potentially will insert | |
2082 | it at the end of this block (if the dest block isn't feasible) | |
2083 | in order to avoid splitting the edge. This insertion will take | |
2084 | place in front of the last jump. But we might have emitted | |
2085 | multiple jumps (conditional and one unconditional) to the | |
2086 | same destination. Inserting in front of the last one then | |
2087 | is a problem. See PR 40021. We fix this by deleting all | |
2088 | jumps except the last unconditional one. */ | |
2089 | insn = PREV_INSN (get_last_insn ()); | |
2090 | /* Make sure we have an unconditional jump. Otherwise we're | |
2091 | confused. */ | |
2092 | gcc_assert (JUMP_P (insn) && !any_condjump_p (insn)); | |
315adeda | 2093 | for (insn = PREV_INSN (insn); insn != last;) |
529ff441 MM |
2094 | { |
2095 | insn = PREV_INSN (insn); | |
2096 | if (JUMP_P (NEXT_INSN (insn))) | |
90eb3e33 | 2097 | { |
8a269cb7 | 2098 | if (!any_condjump_p (NEXT_INSN (insn))) |
90eb3e33 JJ |
2099 | { |
2100 | gcc_assert (BARRIER_P (NEXT_INSN (NEXT_INSN (insn)))); | |
2101 | delete_insn (NEXT_INSN (NEXT_INSN (insn))); | |
2102 | } | |
2103 | delete_insn (NEXT_INSN (insn)); | |
2104 | } | |
529ff441 MM |
2105 | } |
2106 | } | |
2107 | } | |
2108 | ||
726a989a | 2109 | /* A subroutine of expand_gimple_basic_block. Expand one GIMPLE_COND. |
80c7a9eb RH |
2110 | Returns a new basic block if we've terminated the current basic |
2111 | block and created a new one. */ | |
2112 | ||
2113 | static basic_block | |
538dd0b7 | 2114 | expand_gimple_cond (basic_block bb, gcond *stmt) |
80c7a9eb RH |
2115 | { |
2116 | basic_block new_bb, dest; | |
2117 | edge new_edge; | |
2118 | edge true_edge; | |
2119 | edge false_edge; | |
b47aae36 | 2120 | rtx_insn *last2, *last; |
28ed065e MM |
2121 | enum tree_code code; |
2122 | tree op0, op1; | |
2123 | ||
2124 | code = gimple_cond_code (stmt); | |
2125 | op0 = gimple_cond_lhs (stmt); | |
2126 | op1 = gimple_cond_rhs (stmt); | |
2127 | /* We're sometimes presented with such code: | |
2128 | D.123_1 = x < y; | |
2129 | if (D.123_1 != 0) | |
2130 | ... | |
2131 | This would expand to two comparisons which then later might | |
2132 | be cleaned up by combine. But some pattern matchers like if-conversion | |
2133 | work better when there's only one compare, so make up for this | |
2134 | here as special exception if TER would have made the same change. */ | |
31348d52 | 2135 | if (SA.values |
28ed065e | 2136 | && TREE_CODE (op0) == SSA_NAME |
31348d52 RB |
2137 | && TREE_CODE (TREE_TYPE (op0)) == BOOLEAN_TYPE |
2138 | && TREE_CODE (op1) == INTEGER_CST | |
2139 | && ((gimple_cond_code (stmt) == NE_EXPR | |
2140 | && integer_zerop (op1)) | |
2141 | || (gimple_cond_code (stmt) == EQ_EXPR | |
2142 | && integer_onep (op1))) | |
28ed065e MM |
2143 | && bitmap_bit_p (SA.values, SSA_NAME_VERSION (op0))) |
2144 | { | |
2145 | gimple second = SSA_NAME_DEF_STMT (op0); | |
e83f4b68 | 2146 | if (gimple_code (second) == GIMPLE_ASSIGN) |
28ed065e | 2147 | { |
e83f4b68 MM |
2148 | enum tree_code code2 = gimple_assign_rhs_code (second); |
2149 | if (TREE_CODE_CLASS (code2) == tcc_comparison) | |
2150 | { | |
2151 | code = code2; | |
2152 | op0 = gimple_assign_rhs1 (second); | |
2153 | op1 = gimple_assign_rhs2 (second); | |
2154 | } | |
2d52a3a1 ZC |
2155 | /* If jumps are cheap and the target does not support conditional |
2156 | compare, turn some more codes into jumpy sequences. */ | |
2157 | else if (BRANCH_COST (optimize_insn_for_speed_p (), false) < 4 | |
2158 | && targetm.gen_ccmp_first == NULL) | |
e83f4b68 MM |
2159 | { |
2160 | if ((code2 == BIT_AND_EXPR | |
2161 | && TYPE_PRECISION (TREE_TYPE (op0)) == 1 | |
2162 | && TREE_CODE (gimple_assign_rhs2 (second)) != INTEGER_CST) | |
2163 | || code2 == TRUTH_AND_EXPR) | |
2164 | { | |
2165 | code = TRUTH_ANDIF_EXPR; | |
2166 | op0 = gimple_assign_rhs1 (second); | |
2167 | op1 = gimple_assign_rhs2 (second); | |
2168 | } | |
2169 | else if (code2 == BIT_IOR_EXPR || code2 == TRUTH_OR_EXPR) | |
2170 | { | |
2171 | code = TRUTH_ORIF_EXPR; | |
2172 | op0 = gimple_assign_rhs1 (second); | |
2173 | op1 = gimple_assign_rhs2 (second); | |
2174 | } | |
2175 | } | |
28ed065e MM |
2176 | } |
2177 | } | |
b7211528 SB |
2178 | |
2179 | last2 = last = get_last_insn (); | |
80c7a9eb RH |
2180 | |
2181 | extract_true_false_edges_from_block (bb, &true_edge, &false_edge); | |
5368224f | 2182 | set_curr_insn_location (gimple_location (stmt)); |
80c7a9eb RH |
2183 | |
2184 | /* These flags have no purpose in RTL land. */ | |
2185 | true_edge->flags &= ~EDGE_TRUE_VALUE; | |
2186 | false_edge->flags &= ~EDGE_FALSE_VALUE; | |
2187 | ||
2188 | /* We can either have a pure conditional jump with one fallthru edge or | |
2189 | two-way jump that needs to be decomposed into two basic blocks. */ | |
a9b77cd1 | 2190 | if (false_edge->dest == bb->next_bb) |
80c7a9eb | 2191 | { |
40e90eac JJ |
2192 | jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest), |
2193 | true_edge->probability); | |
726a989a | 2194 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
2f13f2de | 2195 | if (true_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2196 | set_curr_insn_location (true_edge->goto_locus); |
a9b77cd1 | 2197 | false_edge->flags |= EDGE_FALLTHRU; |
315adeda | 2198 | maybe_cleanup_end_of_block (false_edge, last); |
80c7a9eb RH |
2199 | return NULL; |
2200 | } | |
a9b77cd1 | 2201 | if (true_edge->dest == bb->next_bb) |
80c7a9eb | 2202 | { |
40e90eac JJ |
2203 | jumpifnot_1 (code, op0, op1, label_rtx_for_bb (false_edge->dest), |
2204 | false_edge->probability); | |
726a989a | 2205 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
2f13f2de | 2206 | if (false_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2207 | set_curr_insn_location (false_edge->goto_locus); |
a9b77cd1 | 2208 | true_edge->flags |= EDGE_FALLTHRU; |
315adeda | 2209 | maybe_cleanup_end_of_block (true_edge, last); |
80c7a9eb RH |
2210 | return NULL; |
2211 | } | |
80c7a9eb | 2212 | |
40e90eac JJ |
2213 | jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest), |
2214 | true_edge->probability); | |
80c7a9eb | 2215 | last = get_last_insn (); |
2f13f2de | 2216 | if (false_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2217 | set_curr_insn_location (false_edge->goto_locus); |
a9b77cd1 | 2218 | emit_jump (label_rtx_for_bb (false_edge->dest)); |
80c7a9eb | 2219 | |
1130d5e3 | 2220 | BB_END (bb) = last; |
80c7a9eb | 2221 | if (BARRIER_P (BB_END (bb))) |
1130d5e3 | 2222 | BB_END (bb) = PREV_INSN (BB_END (bb)); |
80c7a9eb RH |
2223 | update_bb_for_insn (bb); |
2224 | ||
2225 | new_bb = create_basic_block (NEXT_INSN (last), get_last_insn (), bb); | |
2226 | dest = false_edge->dest; | |
2227 | redirect_edge_succ (false_edge, new_bb); | |
2228 | false_edge->flags |= EDGE_FALLTHRU; | |
2229 | new_bb->count = false_edge->count; | |
2230 | new_bb->frequency = EDGE_FREQUENCY (false_edge); | |
726338f4 | 2231 | add_bb_to_loop (new_bb, bb->loop_father); |
80c7a9eb RH |
2232 | new_edge = make_edge (new_bb, dest, 0); |
2233 | new_edge->probability = REG_BR_PROB_BASE; | |
2234 | new_edge->count = new_bb->count; | |
2235 | if (BARRIER_P (BB_END (new_bb))) | |
1130d5e3 | 2236 | BB_END (new_bb) = PREV_INSN (BB_END (new_bb)); |
80c7a9eb RH |
2237 | update_bb_for_insn (new_bb); |
2238 | ||
726a989a | 2239 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
c22cacf3 | 2240 | |
2f13f2de | 2241 | if (true_edge->goto_locus != UNKNOWN_LOCATION) |
7787b4aa | 2242 | { |
5368224f DC |
2243 | set_curr_insn_location (true_edge->goto_locus); |
2244 | true_edge->goto_locus = curr_insn_location (); | |
7787b4aa | 2245 | } |
7787b4aa | 2246 | |
80c7a9eb RH |
2247 | return new_bb; |
2248 | } | |
2249 | ||
0a35513e AH |
2250 | /* Mark all calls that can have a transaction restart. */ |
2251 | ||
2252 | static void | |
2253 | mark_transaction_restart_calls (gimple stmt) | |
2254 | { | |
2255 | struct tm_restart_node dummy; | |
50979347 | 2256 | tm_restart_node **slot; |
0a35513e AH |
2257 | |
2258 | if (!cfun->gimple_df->tm_restart) | |
2259 | return; | |
2260 | ||
2261 | dummy.stmt = stmt; | |
50979347 | 2262 | slot = cfun->gimple_df->tm_restart->find_slot (&dummy, NO_INSERT); |
0a35513e AH |
2263 | if (slot) |
2264 | { | |
50979347 | 2265 | struct tm_restart_node *n = *slot; |
0a35513e | 2266 | tree list = n->label_or_list; |
b47aae36 | 2267 | rtx_insn *insn; |
0a35513e AH |
2268 | |
2269 | for (insn = next_real_insn (get_last_insn ()); | |
2270 | !CALL_P (insn); | |
2271 | insn = next_real_insn (insn)) | |
2272 | continue; | |
2273 | ||
2274 | if (TREE_CODE (list) == LABEL_DECL) | |
2275 | add_reg_note (insn, REG_TM, label_rtx (list)); | |
2276 | else | |
2277 | for (; list ; list = TREE_CHAIN (list)) | |
2278 | add_reg_note (insn, REG_TM, label_rtx (TREE_VALUE (list))); | |
2279 | } | |
2280 | } | |
2281 | ||
28ed065e MM |
2282 | /* A subroutine of expand_gimple_stmt_1, expanding one GIMPLE_CALL |
2283 | statement STMT. */ | |
2284 | ||
2285 | static void | |
538dd0b7 | 2286 | expand_call_stmt (gcall *stmt) |
28ed065e | 2287 | { |
25583c4f | 2288 | tree exp, decl, lhs; |
e23817b3 | 2289 | bool builtin_p; |
e7925582 | 2290 | size_t i; |
28ed065e | 2291 | |
25583c4f RS |
2292 | if (gimple_call_internal_p (stmt)) |
2293 | { | |
2294 | expand_internal_call (stmt); | |
2295 | return; | |
2296 | } | |
2297 | ||
01156003 | 2298 | exp = build_vl_exp (CALL_EXPR, gimple_call_num_args (stmt) + 3); |
089d1227 | 2299 | |
01156003 | 2300 | CALL_EXPR_FN (exp) = gimple_call_fn (stmt); |
089d1227 IE |
2301 | decl = gimple_call_fndecl (stmt); |
2302 | builtin_p = decl && DECL_BUILT_IN (decl); | |
01156003 | 2303 | |
e7925582 EB |
2304 | /* If this is not a builtin function, the function type through which the |
2305 | call is made may be different from the type of the function. */ | |
2306 | if (!builtin_p) | |
2307 | CALL_EXPR_FN (exp) | |
b25aa0e8 EB |
2308 | = fold_convert (build_pointer_type (gimple_call_fntype (stmt)), |
2309 | CALL_EXPR_FN (exp)); | |
e7925582 | 2310 | |
28ed065e MM |
2311 | TREE_TYPE (exp) = gimple_call_return_type (stmt); |
2312 | CALL_EXPR_STATIC_CHAIN (exp) = gimple_call_chain (stmt); | |
2313 | ||
2314 | for (i = 0; i < gimple_call_num_args (stmt); i++) | |
e23817b3 RG |
2315 | { |
2316 | tree arg = gimple_call_arg (stmt, i); | |
2317 | gimple def; | |
2318 | /* TER addresses into arguments of builtin functions so we have a | |
2319 | chance to infer more correct alignment information. See PR39954. */ | |
2320 | if (builtin_p | |
2321 | && TREE_CODE (arg) == SSA_NAME | |
2322 | && (def = get_gimple_for_ssa_name (arg)) | |
2323 | && gimple_assign_rhs_code (def) == ADDR_EXPR) | |
2324 | arg = gimple_assign_rhs1 (def); | |
2325 | CALL_EXPR_ARG (exp, i) = arg; | |
2326 | } | |
28ed065e | 2327 | |
93f28ca7 | 2328 | if (gimple_has_side_effects (stmt)) |
28ed065e MM |
2329 | TREE_SIDE_EFFECTS (exp) = 1; |
2330 | ||
93f28ca7 | 2331 | if (gimple_call_nothrow_p (stmt)) |
28ed065e MM |
2332 | TREE_NOTHROW (exp) = 1; |
2333 | ||
2334 | CALL_EXPR_TAILCALL (exp) = gimple_call_tail_p (stmt); | |
2335 | CALL_EXPR_RETURN_SLOT_OPT (exp) = gimple_call_return_slot_opt_p (stmt); | |
63d2a353 MM |
2336 | if (decl |
2337 | && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL | |
13e49da9 TV |
2338 | && (DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA |
2339 | || DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA_WITH_ALIGN)) | |
63d2a353 MM |
2340 | CALL_ALLOCA_FOR_VAR_P (exp) = gimple_call_alloca_for_var_p (stmt); |
2341 | else | |
2342 | CALL_FROM_THUNK_P (exp) = gimple_call_from_thunk_p (stmt); | |
28ed065e MM |
2343 | CALL_EXPR_VA_ARG_PACK (exp) = gimple_call_va_arg_pack_p (stmt); |
2344 | SET_EXPR_LOCATION (exp, gimple_location (stmt)); | |
d5e254e1 | 2345 | CALL_WITH_BOUNDS_P (exp) = gimple_call_with_bounds_p (stmt); |
28ed065e | 2346 | |
ddb555ed JJ |
2347 | /* Ensure RTL is created for debug args. */ |
2348 | if (decl && DECL_HAS_DEBUG_ARGS_P (decl)) | |
2349 | { | |
9771b263 | 2350 | vec<tree, va_gc> **debug_args = decl_debug_args_lookup (decl); |
ddb555ed JJ |
2351 | unsigned int ix; |
2352 | tree dtemp; | |
2353 | ||
2354 | if (debug_args) | |
9771b263 | 2355 | for (ix = 1; (*debug_args)->iterate (ix, &dtemp); ix += 2) |
ddb555ed JJ |
2356 | { |
2357 | gcc_assert (TREE_CODE (dtemp) == DEBUG_EXPR_DECL); | |
2358 | expand_debug_expr (dtemp); | |
2359 | } | |
2360 | } | |
2361 | ||
25583c4f | 2362 | lhs = gimple_call_lhs (stmt); |
28ed065e MM |
2363 | if (lhs) |
2364 | expand_assignment (lhs, exp, false); | |
2365 | else | |
4c437f02 | 2366 | expand_expr (exp, const0_rtx, VOIDmode, EXPAND_NORMAL); |
0a35513e AH |
2367 | |
2368 | mark_transaction_restart_calls (stmt); | |
28ed065e MM |
2369 | } |
2370 | ||
862d0b35 DN |
2371 | |
2372 | /* Generate RTL for an asm statement (explicit assembler code). | |
2373 | STRING is a STRING_CST node containing the assembler code text, | |
2374 | or an ADDR_EXPR containing a STRING_CST. VOL nonzero means the | |
2375 | insn is volatile; don't optimize it. */ | |
2376 | ||
2377 | static void | |
2378 | expand_asm_loc (tree string, int vol, location_t locus) | |
2379 | { | |
2380 | rtx body; | |
2381 | ||
2382 | if (TREE_CODE (string) == ADDR_EXPR) | |
2383 | string = TREE_OPERAND (string, 0); | |
2384 | ||
2385 | body = gen_rtx_ASM_INPUT_loc (VOIDmode, | |
2386 | ggc_strdup (TREE_STRING_POINTER (string)), | |
2387 | locus); | |
2388 | ||
2389 | MEM_VOLATILE_P (body) = vol; | |
2390 | ||
2391 | emit_insn (body); | |
2392 | } | |
2393 | ||
2394 | /* Return the number of times character C occurs in string S. */ | |
2395 | static int | |
2396 | n_occurrences (int c, const char *s) | |
2397 | { | |
2398 | int n = 0; | |
2399 | while (*s) | |
2400 | n += (*s++ == c); | |
2401 | return n; | |
2402 | } | |
2403 | ||
2404 | /* A subroutine of expand_asm_operands. Check that all operands have | |
2405 | the same number of alternatives. Return true if so. */ | |
2406 | ||
2407 | static bool | |
7ca35180 | 2408 | check_operand_nalternatives (const vec<const char *> &constraints) |
862d0b35 | 2409 | { |
7ca35180 RH |
2410 | unsigned len = constraints.length(); |
2411 | if (len > 0) | |
862d0b35 | 2412 | { |
7ca35180 | 2413 | int nalternatives = n_occurrences (',', constraints[0]); |
862d0b35 DN |
2414 | |
2415 | if (nalternatives + 1 > MAX_RECOG_ALTERNATIVES) | |
2416 | { | |
2417 | error ("too many alternatives in %<asm%>"); | |
2418 | return false; | |
2419 | } | |
2420 | ||
7ca35180 RH |
2421 | for (unsigned i = 1; i < len; ++i) |
2422 | if (n_occurrences (',', constraints[i]) != nalternatives) | |
2423 | { | |
2424 | error ("operand constraints for %<asm%> differ " | |
2425 | "in number of alternatives"); | |
2426 | return false; | |
2427 | } | |
862d0b35 | 2428 | } |
862d0b35 DN |
2429 | return true; |
2430 | } | |
2431 | ||
2432 | /* Check for overlap between registers marked in CLOBBERED_REGS and | |
2433 | anything inappropriate in T. Emit error and return the register | |
2434 | variable definition for error, NULL_TREE for ok. */ | |
2435 | ||
2436 | static bool | |
2437 | tree_conflicts_with_clobbers_p (tree t, HARD_REG_SET *clobbered_regs) | |
2438 | { | |
2439 | /* Conflicts between asm-declared register variables and the clobber | |
2440 | list are not allowed. */ | |
2441 | tree overlap = tree_overlaps_hard_reg_set (t, clobbered_regs); | |
2442 | ||
2443 | if (overlap) | |
2444 | { | |
2445 | error ("asm-specifier for variable %qE conflicts with asm clobber list", | |
2446 | DECL_NAME (overlap)); | |
2447 | ||
2448 | /* Reset registerness to stop multiple errors emitted for a single | |
2449 | variable. */ | |
2450 | DECL_REGISTER (overlap) = 0; | |
2451 | return true; | |
2452 | } | |
2453 | ||
2454 | return false; | |
2455 | } | |
2456 | ||
2457 | /* Generate RTL for an asm statement with arguments. | |
2458 | STRING is the instruction template. | |
2459 | OUTPUTS is a list of output arguments (lvalues); INPUTS a list of inputs. | |
2460 | Each output or input has an expression in the TREE_VALUE and | |
2461 | a tree list in TREE_PURPOSE which in turn contains a constraint | |
2462 | name in TREE_VALUE (or NULL_TREE) and a constraint string | |
2463 | in TREE_PURPOSE. | |
2464 | CLOBBERS is a list of STRING_CST nodes each naming a hard register | |
2465 | that is clobbered by this insn. | |
2466 | ||
2467 | LABELS is a list of labels, and if LABELS is non-NULL, FALLTHRU_BB | |
2468 | should be the fallthru basic block of the asm goto. | |
2469 | ||
2470 | Not all kinds of lvalue that may appear in OUTPUTS can be stored directly. | |
2471 | Some elements of OUTPUTS may be replaced with trees representing temporary | |
2472 | values. The caller should copy those temporary values to the originally | |
2473 | specified lvalues. | |
2474 | ||
2475 | VOL nonzero means the insn is volatile; don't optimize it. */ | |
2476 | ||
2477 | static void | |
6476a8fd | 2478 | expand_asm_stmt (gasm *stmt) |
862d0b35 | 2479 | { |
7ca35180 RH |
2480 | class save_input_location |
2481 | { | |
2482 | location_t old; | |
6476a8fd | 2483 | |
7ca35180 RH |
2484 | public: |
2485 | explicit save_input_location(location_t where) | |
6476a8fd | 2486 | { |
7ca35180 RH |
2487 | old = input_location; |
2488 | input_location = where; | |
6476a8fd RH |
2489 | } |
2490 | ||
7ca35180 | 2491 | ~save_input_location() |
6476a8fd | 2492 | { |
7ca35180 | 2493 | input_location = old; |
6476a8fd | 2494 | } |
7ca35180 | 2495 | }; |
6476a8fd | 2496 | |
7ca35180 | 2497 | location_t locus = gimple_location (stmt); |
6476a8fd | 2498 | |
7ca35180 | 2499 | if (gimple_asm_input_p (stmt)) |
6476a8fd | 2500 | { |
7ca35180 RH |
2501 | const char *s = gimple_asm_string (stmt); |
2502 | tree string = build_string (strlen (s), s); | |
2503 | expand_asm_loc (string, gimple_asm_volatile_p (stmt), locus); | |
2504 | return; | |
6476a8fd RH |
2505 | } |
2506 | ||
7ca35180 RH |
2507 | /* There are some legacy diagnostics in here, and also avoids a |
2508 | sixth parameger to targetm.md_asm_adjust. */ | |
2509 | save_input_location s_i_l(locus); | |
6476a8fd | 2510 | |
7ca35180 RH |
2511 | unsigned noutputs = gimple_asm_noutputs (stmt); |
2512 | unsigned ninputs = gimple_asm_ninputs (stmt); | |
2513 | unsigned nlabels = gimple_asm_nlabels (stmt); | |
2514 | unsigned i; | |
2515 | ||
2516 | /* ??? Diagnose during gimplification? */ | |
2517 | if (ninputs + noutputs + nlabels > MAX_RECOG_OPERANDS) | |
6476a8fd | 2518 | { |
7ca35180 | 2519 | error ("more than %d operands in %<asm%>", MAX_RECOG_OPERANDS); |
6476a8fd RH |
2520 | return; |
2521 | } | |
2522 | ||
7ca35180 RH |
2523 | auto_vec<tree, MAX_RECOG_OPERANDS> output_tvec; |
2524 | auto_vec<tree, MAX_RECOG_OPERANDS> input_tvec; | |
2525 | auto_vec<const char *, MAX_RECOG_OPERANDS> constraints; | |
6476a8fd | 2526 | |
7ca35180 | 2527 | /* Copy the gimple vectors into new vectors that we can manipulate. */ |
862d0b35 | 2528 | |
7ca35180 RH |
2529 | output_tvec.safe_grow (noutputs); |
2530 | input_tvec.safe_grow (ninputs); | |
2531 | constraints.safe_grow (noutputs + ninputs); | |
862d0b35 | 2532 | |
7ca35180 RH |
2533 | for (i = 0; i < noutputs; ++i) |
2534 | { | |
2535 | tree t = gimple_asm_output_op (stmt, i); | |
2536 | output_tvec[i] = TREE_VALUE (t); | |
2537 | constraints[i] = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); | |
2538 | } | |
2539 | for (i = 0; i < ninputs; i++) | |
2540 | { | |
2541 | tree t = gimple_asm_input_op (stmt, i); | |
2542 | input_tvec[i] = TREE_VALUE (t); | |
2543 | constraints[i + noutputs] | |
2544 | = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); | |
2545 | } | |
862d0b35 | 2546 | |
7ca35180 RH |
2547 | /* ??? Diagnose during gimplification? */ |
2548 | if (! check_operand_nalternatives (constraints)) | |
2549 | return; | |
862d0b35 DN |
2550 | |
2551 | /* Count the number of meaningful clobbered registers, ignoring what | |
2552 | we would ignore later. */ | |
7ca35180 RH |
2553 | auto_vec<rtx> clobber_rvec; |
2554 | HARD_REG_SET clobbered_regs; | |
862d0b35 | 2555 | CLEAR_HARD_REG_SET (clobbered_regs); |
862d0b35 | 2556 | |
7ca35180 RH |
2557 | if (unsigned n = gimple_asm_nclobbers (stmt)) |
2558 | { | |
2559 | clobber_rvec.reserve (n); | |
2560 | for (i = 0; i < n; i++) | |
2561 | { | |
2562 | tree t = gimple_asm_clobber_op (stmt, i); | |
2563 | const char *regname = TREE_STRING_POINTER (TREE_VALUE (t)); | |
2564 | int nregs, j; | |
862d0b35 | 2565 | |
7ca35180 RH |
2566 | j = decode_reg_name_and_count (regname, &nregs); |
2567 | if (j < 0) | |
862d0b35 | 2568 | { |
7ca35180 | 2569 | if (j == -2) |
862d0b35 | 2570 | { |
7ca35180 RH |
2571 | /* ??? Diagnose during gimplification? */ |
2572 | error ("unknown register name %qs in %<asm%>", regname); | |
2573 | } | |
2574 | else if (j == -4) | |
2575 | { | |
2576 | rtx x = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode)); | |
2577 | clobber_rvec.safe_push (x); | |
2578 | } | |
2579 | else | |
2580 | { | |
2581 | /* Otherwise we should have -1 == empty string | |
2582 | or -3 == cc, which is not a register. */ | |
2583 | gcc_assert (j == -1 || j == -3); | |
862d0b35 | 2584 | } |
862d0b35 | 2585 | } |
7ca35180 RH |
2586 | else |
2587 | for (int reg = j; reg < j + nregs; reg++) | |
2588 | { | |
2589 | /* Clobbering the PIC register is an error. */ | |
2590 | if (reg == (int) PIC_OFFSET_TABLE_REGNUM) | |
2591 | { | |
2592 | /* ??? Diagnose during gimplification? */ | |
2593 | error ("PIC register clobbered by %qs in %<asm%>", | |
2594 | regname); | |
2595 | return; | |
2596 | } | |
2597 | ||
2598 | SET_HARD_REG_BIT (clobbered_regs, reg); | |
2599 | rtx x = gen_rtx_REG (reg_raw_mode[reg], reg); | |
2600 | clobber_rvec.safe_push (x); | |
2601 | } | |
862d0b35 DN |
2602 | } |
2603 | } | |
7ca35180 | 2604 | unsigned nclobbers = clobber_rvec.length(); |
862d0b35 DN |
2605 | |
2606 | /* First pass over inputs and outputs checks validity and sets | |
2607 | mark_addressable if needed. */ | |
7ca35180 | 2608 | /* ??? Diagnose during gimplification? */ |
862d0b35 | 2609 | |
7ca35180 | 2610 | for (i = 0; i < noutputs; ++i) |
862d0b35 | 2611 | { |
7ca35180 | 2612 | tree val = output_tvec[i]; |
862d0b35 DN |
2613 | tree type = TREE_TYPE (val); |
2614 | const char *constraint; | |
2615 | bool is_inout; | |
2616 | bool allows_reg; | |
2617 | bool allows_mem; | |
2618 | ||
862d0b35 DN |
2619 | /* Try to parse the output constraint. If that fails, there's |
2620 | no point in going further. */ | |
2621 | constraint = constraints[i]; | |
2622 | if (!parse_output_constraint (&constraint, i, ninputs, noutputs, | |
2623 | &allows_mem, &allows_reg, &is_inout)) | |
2624 | return; | |
2625 | ||
2626 | if (! allows_reg | |
2627 | && (allows_mem | |
2628 | || is_inout | |
2629 | || (DECL_P (val) | |
2630 | && REG_P (DECL_RTL (val)) | |
2631 | && GET_MODE (DECL_RTL (val)) != TYPE_MODE (type)))) | |
2632 | mark_addressable (val); | |
862d0b35 DN |
2633 | } |
2634 | ||
7ca35180 | 2635 | for (i = 0; i < ninputs; ++i) |
862d0b35 DN |
2636 | { |
2637 | bool allows_reg, allows_mem; | |
2638 | const char *constraint; | |
2639 | ||
862d0b35 | 2640 | constraint = constraints[i + noutputs]; |
7ca35180 RH |
2641 | if (! parse_input_constraint (&constraint, i, ninputs, noutputs, 0, |
2642 | constraints.address (), | |
2643 | &allows_mem, &allows_reg)) | |
862d0b35 DN |
2644 | return; |
2645 | ||
2646 | if (! allows_reg && allows_mem) | |
7ca35180 | 2647 | mark_addressable (input_tvec[i]); |
862d0b35 DN |
2648 | } |
2649 | ||
2650 | /* Second pass evaluates arguments. */ | |
2651 | ||
2652 | /* Make sure stack is consistent for asm goto. */ | |
2653 | if (nlabels > 0) | |
2654 | do_pending_stack_adjust (); | |
7ca35180 RH |
2655 | int old_generating_concat_p = generating_concat_p; |
2656 | ||
2657 | /* Vector of RTX's of evaluated output operands. */ | |
2658 | auto_vec<rtx, MAX_RECOG_OPERANDS> output_rvec; | |
2659 | auto_vec<int, MAX_RECOG_OPERANDS> inout_opnum; | |
2660 | rtx_insn *after_rtl_seq = NULL, *after_rtl_end = NULL; | |
862d0b35 | 2661 | |
7ca35180 RH |
2662 | output_rvec.safe_grow (noutputs); |
2663 | ||
2664 | for (i = 0; i < noutputs; ++i) | |
862d0b35 | 2665 | { |
7ca35180 | 2666 | tree val = output_tvec[i]; |
862d0b35 | 2667 | tree type = TREE_TYPE (val); |
7ca35180 | 2668 | bool is_inout, allows_reg, allows_mem, ok; |
862d0b35 | 2669 | rtx op; |
862d0b35 DN |
2670 | |
2671 | ok = parse_output_constraint (&constraints[i], i, ninputs, | |
2672 | noutputs, &allows_mem, &allows_reg, | |
2673 | &is_inout); | |
2674 | gcc_assert (ok); | |
2675 | ||
2676 | /* If an output operand is not a decl or indirect ref and our constraint | |
2677 | allows a register, make a temporary to act as an intermediate. | |
7ca35180 | 2678 | Make the asm insn write into that, then we will copy it to |
862d0b35 DN |
2679 | the real output operand. Likewise for promoted variables. */ |
2680 | ||
2681 | generating_concat_p = 0; | |
2682 | ||
862d0b35 DN |
2683 | if ((TREE_CODE (val) == INDIRECT_REF |
2684 | && allows_mem) | |
2685 | || (DECL_P (val) | |
2686 | && (allows_mem || REG_P (DECL_RTL (val))) | |
2687 | && ! (REG_P (DECL_RTL (val)) | |
2688 | && GET_MODE (DECL_RTL (val)) != TYPE_MODE (type))) | |
2689 | || ! allows_reg | |
2690 | || is_inout) | |
2691 | { | |
2692 | op = expand_expr (val, NULL_RTX, VOIDmode, | |
2693 | !allows_reg ? EXPAND_MEMORY : EXPAND_WRITE); | |
2694 | if (MEM_P (op)) | |
2695 | op = validize_mem (op); | |
2696 | ||
2697 | if (! allows_reg && !MEM_P (op)) | |
2698 | error ("output number %d not directly addressable", i); | |
2699 | if ((! allows_mem && MEM_P (op)) | |
2700 | || GET_CODE (op) == CONCAT) | |
2701 | { | |
7ca35180 | 2702 | rtx old_op = op; |
862d0b35 | 2703 | op = gen_reg_rtx (GET_MODE (op)); |
7ca35180 RH |
2704 | |
2705 | generating_concat_p = old_generating_concat_p; | |
2706 | ||
862d0b35 | 2707 | if (is_inout) |
7ca35180 RH |
2708 | emit_move_insn (op, old_op); |
2709 | ||
2710 | push_to_sequence2 (after_rtl_seq, after_rtl_end); | |
2711 | emit_move_insn (old_op, op); | |
2712 | after_rtl_seq = get_insns (); | |
2713 | after_rtl_end = get_last_insn (); | |
2714 | end_sequence (); | |
862d0b35 DN |
2715 | } |
2716 | } | |
2717 | else | |
2718 | { | |
2719 | op = assign_temp (type, 0, 1); | |
2720 | op = validize_mem (op); | |
7ca35180 RH |
2721 | if (!MEM_P (op) && TREE_CODE (val) == SSA_NAME) |
2722 | set_reg_attrs_for_decl_rtl (SSA_NAME_VAR (val), op); | |
862d0b35 | 2723 | |
7ca35180 | 2724 | generating_concat_p = old_generating_concat_p; |
862d0b35 | 2725 | |
7ca35180 RH |
2726 | push_to_sequence2 (after_rtl_seq, after_rtl_end); |
2727 | expand_assignment (val, make_tree (type, op), false); | |
2728 | after_rtl_seq = get_insns (); | |
2729 | after_rtl_end = get_last_insn (); | |
2730 | end_sequence (); | |
862d0b35 | 2731 | } |
7ca35180 | 2732 | output_rvec[i] = op; |
862d0b35 | 2733 | |
7ca35180 RH |
2734 | if (is_inout) |
2735 | inout_opnum.safe_push (i); | |
862d0b35 DN |
2736 | } |
2737 | ||
7ca35180 RH |
2738 | auto_vec<rtx, MAX_RECOG_OPERANDS> input_rvec; |
2739 | auto_vec<machine_mode, MAX_RECOG_OPERANDS> input_mode; | |
862d0b35 | 2740 | |
7ca35180 RH |
2741 | input_rvec.safe_grow (ninputs); |
2742 | input_mode.safe_grow (ninputs); | |
862d0b35 | 2743 | |
7ca35180 | 2744 | generating_concat_p = 0; |
862d0b35 | 2745 | |
7ca35180 | 2746 | for (i = 0; i < ninputs; ++i) |
862d0b35 | 2747 | { |
7ca35180 RH |
2748 | tree val = input_tvec[i]; |
2749 | tree type = TREE_TYPE (val); | |
2750 | bool allows_reg, allows_mem, ok; | |
862d0b35 | 2751 | const char *constraint; |
862d0b35 | 2752 | rtx op; |
862d0b35 DN |
2753 | |
2754 | constraint = constraints[i + noutputs]; | |
7ca35180 RH |
2755 | ok = parse_input_constraint (&constraint, i, ninputs, noutputs, 0, |
2756 | constraints.address (), | |
2757 | &allows_mem, &allows_reg); | |
862d0b35 DN |
2758 | gcc_assert (ok); |
2759 | ||
862d0b35 DN |
2760 | /* EXPAND_INITIALIZER will not generate code for valid initializer |
2761 | constants, but will still generate code for other types of operand. | |
2762 | This is the behavior we want for constant constraints. */ | |
2763 | op = expand_expr (val, NULL_RTX, VOIDmode, | |
2764 | allows_reg ? EXPAND_NORMAL | |
2765 | : allows_mem ? EXPAND_MEMORY | |
2766 | : EXPAND_INITIALIZER); | |
2767 | ||
2768 | /* Never pass a CONCAT to an ASM. */ | |
2769 | if (GET_CODE (op) == CONCAT) | |
2770 | op = force_reg (GET_MODE (op), op); | |
2771 | else if (MEM_P (op)) | |
2772 | op = validize_mem (op); | |
2773 | ||
2774 | if (asm_operand_ok (op, constraint, NULL) <= 0) | |
2775 | { | |
2776 | if (allows_reg && TYPE_MODE (type) != BLKmode) | |
2777 | op = force_reg (TYPE_MODE (type), op); | |
2778 | else if (!allows_mem) | |
2779 | warning (0, "asm operand %d probably doesn%'t match constraints", | |
2780 | i + noutputs); | |
2781 | else if (MEM_P (op)) | |
2782 | { | |
2783 | /* We won't recognize either volatile memory or memory | |
2784 | with a queued address as available a memory_operand | |
2785 | at this point. Ignore it: clearly this *is* a memory. */ | |
2786 | } | |
2787 | else | |
2788 | gcc_unreachable (); | |
2789 | } | |
7ca35180 RH |
2790 | input_rvec[i] = op; |
2791 | input_mode[i] = TYPE_MODE (type); | |
862d0b35 DN |
2792 | } |
2793 | ||
862d0b35 | 2794 | /* For in-out operands, copy output rtx to input rtx. */ |
7ca35180 | 2795 | unsigned ninout = inout_opnum.length(); |
862d0b35 DN |
2796 | for (i = 0; i < ninout; i++) |
2797 | { | |
2798 | int j = inout_opnum[i]; | |
7ca35180 | 2799 | rtx o = output_rvec[j]; |
862d0b35 | 2800 | |
7ca35180 RH |
2801 | input_rvec.safe_push (o); |
2802 | input_mode.safe_push (GET_MODE (o)); | |
862d0b35 | 2803 | |
7ca35180 | 2804 | char buffer[16]; |
862d0b35 | 2805 | sprintf (buffer, "%d", j); |
7ca35180 RH |
2806 | constraints.safe_push (ggc_strdup (buffer)); |
2807 | } | |
2808 | ninputs += ninout; | |
2809 | ||
2810 | /* Sometimes we wish to automatically clobber registers across an asm. | |
2811 | Case in point is when the i386 backend moved from cc0 to a hard reg -- | |
2812 | maintaining source-level compatibility means automatically clobbering | |
2813 | the flags register. */ | |
2814 | rtx_insn *after_md_seq = NULL; | |
2815 | if (targetm.md_asm_adjust) | |
2816 | after_md_seq = targetm.md_asm_adjust (output_rvec, input_rvec, | |
2817 | constraints, clobber_rvec, | |
2818 | clobbered_regs); | |
2819 | ||
2820 | /* Do not allow the hook to change the output and input count, | |
2821 | lest it mess up the operand numbering. */ | |
2822 | gcc_assert (output_rvec.length() == noutputs); | |
2823 | gcc_assert (input_rvec.length() == ninputs); | |
2824 | gcc_assert (constraints.length() == noutputs + ninputs); | |
2825 | ||
2826 | /* But it certainly can adjust the clobbers. */ | |
2827 | nclobbers = clobber_rvec.length(); | |
2828 | ||
2829 | /* Third pass checks for easy conflicts. */ | |
2830 | /* ??? Why are we doing this on trees instead of rtx. */ | |
2831 | ||
2832 | bool clobber_conflict_found = 0; | |
2833 | for (i = 0; i < noutputs; ++i) | |
2834 | if (tree_conflicts_with_clobbers_p (output_tvec[i], &clobbered_regs)) | |
2835 | clobber_conflict_found = 1; | |
2836 | for (i = 0; i < ninputs - ninout; ++i) | |
2837 | if (tree_conflicts_with_clobbers_p (input_tvec[i], &clobbered_regs)) | |
2838 | clobber_conflict_found = 1; | |
2839 | ||
2840 | /* Make vectors for the expression-rtx, constraint strings, | |
2841 | and named operands. */ | |
2842 | ||
2843 | rtvec argvec = rtvec_alloc (ninputs); | |
2844 | rtvec constraintvec = rtvec_alloc (ninputs); | |
2845 | rtvec labelvec = rtvec_alloc (nlabels); | |
2846 | ||
2847 | rtx body = gen_rtx_ASM_OPERANDS ((noutputs == 0 ? VOIDmode | |
2848 | : GET_MODE (output_rvec[0])), | |
2849 | ggc_strdup (gimple_asm_string (stmt)), | |
2850 | empty_string, 0, argvec, constraintvec, | |
2851 | labelvec, locus); | |
2852 | MEM_VOLATILE_P (body) = gimple_asm_volatile_p (stmt); | |
2853 | ||
2854 | for (i = 0; i < ninputs; ++i) | |
2855 | { | |
2856 | ASM_OPERANDS_INPUT (body, i) = input_rvec[i]; | |
2857 | ASM_OPERANDS_INPUT_CONSTRAINT_EXP (body, i) | |
2858 | = gen_rtx_ASM_INPUT_loc (input_mode[i], | |
2859 | constraints[i + noutputs], | |
2860 | locus); | |
862d0b35 DN |
2861 | } |
2862 | ||
2863 | /* Copy labels to the vector. */ | |
7ca35180 RH |
2864 | rtx_code_label *fallthru_label = NULL; |
2865 | if (nlabels > 0) | |
2866 | { | |
2867 | basic_block fallthru_bb = NULL; | |
2868 | edge fallthru = find_fallthru_edge (gimple_bb (stmt)->succs); | |
2869 | if (fallthru) | |
2870 | fallthru_bb = fallthru->dest; | |
2871 | ||
2872 | for (i = 0; i < nlabels; ++i) | |
862d0b35 | 2873 | { |
7ca35180 | 2874 | tree label = TREE_VALUE (gimple_asm_label_op (stmt, i)); |
e67d1102 | 2875 | rtx_insn *r; |
7ca35180 RH |
2876 | /* If asm goto has any labels in the fallthru basic block, use |
2877 | a label that we emit immediately after the asm goto. Expansion | |
2878 | may insert further instructions into the same basic block after | |
2879 | asm goto and if we don't do this, insertion of instructions on | |
2880 | the fallthru edge might misbehave. See PR58670. */ | |
2881 | if (fallthru_bb && label_to_block_fn (cfun, label) == fallthru_bb) | |
2882 | { | |
2883 | if (fallthru_label == NULL_RTX) | |
2884 | fallthru_label = gen_label_rtx (); | |
2885 | r = fallthru_label; | |
2886 | } | |
2887 | else | |
2888 | r = label_rtx (label); | |
2889 | ASM_OPERANDS_LABEL (body, i) = gen_rtx_LABEL_REF (Pmode, r); | |
862d0b35 | 2890 | } |
862d0b35 DN |
2891 | } |
2892 | ||
862d0b35 DN |
2893 | /* Now, for each output, construct an rtx |
2894 | (set OUTPUT (asm_operands INSN OUTPUTCONSTRAINT OUTPUTNUMBER | |
2895 | ARGVEC CONSTRAINTS OPNAMES)) | |
2896 | If there is more than one, put them inside a PARALLEL. */ | |
2897 | ||
2898 | if (nlabels > 0 && nclobbers == 0) | |
2899 | { | |
2900 | gcc_assert (noutputs == 0); | |
2901 | emit_jump_insn (body); | |
2902 | } | |
2903 | else if (noutputs == 0 && nclobbers == 0) | |
2904 | { | |
2905 | /* No output operands: put in a raw ASM_OPERANDS rtx. */ | |
2906 | emit_insn (body); | |
2907 | } | |
2908 | else if (noutputs == 1 && nclobbers == 0) | |
2909 | { | |
7ca35180 RH |
2910 | ASM_OPERANDS_OUTPUT_CONSTRAINT (body) = constraints[0]; |
2911 | emit_insn (gen_rtx_SET (output_rvec[0], body)); | |
862d0b35 DN |
2912 | } |
2913 | else | |
2914 | { | |
2915 | rtx obody = body; | |
2916 | int num = noutputs; | |
2917 | ||
2918 | if (num == 0) | |
2919 | num = 1; | |
2920 | ||
2921 | body = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (num + nclobbers)); | |
2922 | ||
2923 | /* For each output operand, store a SET. */ | |
7ca35180 | 2924 | for (i = 0; i < noutputs; ++i) |
862d0b35 | 2925 | { |
7ca35180 RH |
2926 | rtx src, o = output_rvec[i]; |
2927 | if (i == 0) | |
2928 | { | |
2929 | ASM_OPERANDS_OUTPUT_CONSTRAINT (obody) = constraints[0]; | |
2930 | src = obody; | |
2931 | } | |
2932 | else | |
2933 | { | |
2934 | src = gen_rtx_ASM_OPERANDS (GET_MODE (o), | |
2935 | ASM_OPERANDS_TEMPLATE (obody), | |
2936 | constraints[i], i, argvec, | |
2937 | constraintvec, labelvec, locus); | |
2938 | MEM_VOLATILE_P (src) = gimple_asm_volatile_p (stmt); | |
2939 | } | |
2940 | XVECEXP (body, 0, i) = gen_rtx_SET (o, src); | |
862d0b35 DN |
2941 | } |
2942 | ||
2943 | /* If there are no outputs (but there are some clobbers) | |
2944 | store the bare ASM_OPERANDS into the PARALLEL. */ | |
862d0b35 DN |
2945 | if (i == 0) |
2946 | XVECEXP (body, 0, i++) = obody; | |
2947 | ||
2948 | /* Store (clobber REG) for each clobbered register specified. */ | |
7ca35180 | 2949 | for (unsigned j = 0; j < nclobbers; ++j) |
862d0b35 | 2950 | { |
7ca35180 | 2951 | rtx clobbered_reg = clobber_rvec[j]; |
862d0b35 | 2952 | |
7ca35180 RH |
2953 | /* Do sanity check for overlap between clobbers and respectively |
2954 | input and outputs that hasn't been handled. Such overlap | |
2955 | should have been detected and reported above. */ | |
2956 | if (!clobber_conflict_found && REG_P (clobbered_reg)) | |
862d0b35 | 2957 | { |
7ca35180 RH |
2958 | /* We test the old body (obody) contents to avoid |
2959 | tripping over the under-construction body. */ | |
2960 | for (unsigned k = 0; k < noutputs; ++k) | |
2961 | if (reg_overlap_mentioned_p (clobbered_reg, output_rvec[k])) | |
2962 | internal_error ("asm clobber conflict with output operand"); | |
2963 | ||
2964 | for (unsigned k = 0; k < ninputs - ninout; ++k) | |
2965 | if (reg_overlap_mentioned_p (clobbered_reg, input_rvec[k])) | |
2966 | internal_error ("asm clobber conflict with input operand"); | |
862d0b35 DN |
2967 | } |
2968 | ||
7ca35180 | 2969 | XVECEXP (body, 0, i++) = gen_rtx_CLOBBER (VOIDmode, clobbered_reg); |
862d0b35 DN |
2970 | } |
2971 | ||
2972 | if (nlabels > 0) | |
2973 | emit_jump_insn (body); | |
2974 | else | |
2975 | emit_insn (body); | |
2976 | } | |
2977 | ||
7ca35180 RH |
2978 | generating_concat_p = old_generating_concat_p; |
2979 | ||
862d0b35 DN |
2980 | if (fallthru_label) |
2981 | emit_label (fallthru_label); | |
2982 | ||
7ca35180 RH |
2983 | if (after_md_seq) |
2984 | emit_insn (after_md_seq); | |
2985 | if (after_rtl_seq) | |
2986 | emit_insn (after_rtl_seq); | |
862d0b35 | 2987 | |
6476a8fd | 2988 | free_temp_slots (); |
7ca35180 | 2989 | crtl->has_asm_statement = 1; |
862d0b35 DN |
2990 | } |
2991 | ||
2992 | /* Emit code to jump to the address | |
2993 | specified by the pointer expression EXP. */ | |
2994 | ||
2995 | static void | |
2996 | expand_computed_goto (tree exp) | |
2997 | { | |
2998 | rtx x = expand_normal (exp); | |
2999 | ||
862d0b35 DN |
3000 | do_pending_stack_adjust (); |
3001 | emit_indirect_jump (x); | |
3002 | } | |
3003 | ||
3004 | /* Generate RTL code for a `goto' statement with target label LABEL. | |
3005 | LABEL should be a LABEL_DECL tree node that was or will later be | |
3006 | defined with `expand_label'. */ | |
3007 | ||
3008 | static void | |
3009 | expand_goto (tree label) | |
3010 | { | |
3011 | #ifdef ENABLE_CHECKING | |
3012 | /* Check for a nonlocal goto to a containing function. Should have | |
3013 | gotten translated to __builtin_nonlocal_goto. */ | |
3014 | tree context = decl_function_context (label); | |
3015 | gcc_assert (!context || context == current_function_decl); | |
3016 | #endif | |
3017 | ||
1476d1bd | 3018 | emit_jump (jump_target_rtx (label)); |
862d0b35 DN |
3019 | } |
3020 | ||
3021 | /* Output a return with no value. */ | |
3022 | ||
3023 | static void | |
3024 | expand_null_return_1 (void) | |
3025 | { | |
3026 | clear_pending_stack_adjust (); | |
3027 | do_pending_stack_adjust (); | |
3028 | emit_jump (return_label); | |
3029 | } | |
3030 | ||
3031 | /* Generate RTL to return from the current function, with no value. | |
3032 | (That is, we do not do anything about returning any value.) */ | |
3033 | ||
3034 | void | |
3035 | expand_null_return (void) | |
3036 | { | |
3037 | /* If this function was declared to return a value, but we | |
3038 | didn't, clobber the return registers so that they are not | |
3039 | propagated live to the rest of the function. */ | |
3040 | clobber_return_register (); | |
3041 | ||
3042 | expand_null_return_1 (); | |
3043 | } | |
3044 | ||
3045 | /* Generate RTL to return from the current function, with value VAL. */ | |
3046 | ||
3047 | static void | |
3048 | expand_value_return (rtx val) | |
3049 | { | |
3050 | /* Copy the value to the return location unless it's already there. */ | |
3051 | ||
3052 | tree decl = DECL_RESULT (current_function_decl); | |
3053 | rtx return_reg = DECL_RTL (decl); | |
3054 | if (return_reg != val) | |
3055 | { | |
3056 | tree funtype = TREE_TYPE (current_function_decl); | |
3057 | tree type = TREE_TYPE (decl); | |
3058 | int unsignedp = TYPE_UNSIGNED (type); | |
ef4bddc2 RS |
3059 | machine_mode old_mode = DECL_MODE (decl); |
3060 | machine_mode mode; | |
862d0b35 DN |
3061 | if (DECL_BY_REFERENCE (decl)) |
3062 | mode = promote_function_mode (type, old_mode, &unsignedp, funtype, 2); | |
3063 | else | |
3064 | mode = promote_function_mode (type, old_mode, &unsignedp, funtype, 1); | |
3065 | ||
3066 | if (mode != old_mode) | |
3067 | val = convert_modes (mode, old_mode, val, unsignedp); | |
3068 | ||
3069 | if (GET_CODE (return_reg) == PARALLEL) | |
3070 | emit_group_load (return_reg, val, type, int_size_in_bytes (type)); | |
3071 | else | |
3072 | emit_move_insn (return_reg, val); | |
3073 | } | |
3074 | ||
3075 | expand_null_return_1 (); | |
3076 | } | |
3077 | ||
3078 | /* Generate RTL to evaluate the expression RETVAL and return it | |
3079 | from the current function. */ | |
3080 | ||
3081 | static void | |
d5e254e1 | 3082 | expand_return (tree retval, tree bounds) |
862d0b35 DN |
3083 | { |
3084 | rtx result_rtl; | |
3085 | rtx val = 0; | |
3086 | tree retval_rhs; | |
d5e254e1 | 3087 | rtx bounds_rtl; |
862d0b35 DN |
3088 | |
3089 | /* If function wants no value, give it none. */ | |
3090 | if (TREE_CODE (TREE_TYPE (TREE_TYPE (current_function_decl))) == VOID_TYPE) | |
3091 | { | |
3092 | expand_normal (retval); | |
3093 | expand_null_return (); | |
3094 | return; | |
3095 | } | |
3096 | ||
3097 | if (retval == error_mark_node) | |
3098 | { | |
3099 | /* Treat this like a return of no value from a function that | |
3100 | returns a value. */ | |
3101 | expand_null_return (); | |
3102 | return; | |
3103 | } | |
3104 | else if ((TREE_CODE (retval) == MODIFY_EXPR | |
3105 | || TREE_CODE (retval) == INIT_EXPR) | |
3106 | && TREE_CODE (TREE_OPERAND (retval, 0)) == RESULT_DECL) | |
3107 | retval_rhs = TREE_OPERAND (retval, 1); | |
3108 | else | |
3109 | retval_rhs = retval; | |
3110 | ||
3111 | result_rtl = DECL_RTL (DECL_RESULT (current_function_decl)); | |
3112 | ||
d5e254e1 IE |
3113 | /* Put returned bounds to the right place. */ |
3114 | bounds_rtl = DECL_BOUNDS_RTL (DECL_RESULT (current_function_decl)); | |
3115 | if (bounds_rtl) | |
3116 | { | |
855f036d IE |
3117 | rtx addr = NULL; |
3118 | rtx bnd = NULL; | |
d5e254e1 | 3119 | |
855f036d | 3120 | if (bounds && bounds != error_mark_node) |
d5e254e1 IE |
3121 | { |
3122 | bnd = expand_normal (bounds); | |
3123 | targetm.calls.store_returned_bounds (bounds_rtl, bnd); | |
3124 | } | |
3125 | else if (REG_P (bounds_rtl)) | |
3126 | { | |
855f036d IE |
3127 | if (bounds) |
3128 | bnd = chkp_expand_zero_bounds (); | |
3129 | else | |
3130 | { | |
3131 | addr = expand_normal (build_fold_addr_expr (retval_rhs)); | |
3132 | addr = gen_rtx_MEM (Pmode, addr); | |
3133 | bnd = targetm.calls.load_bounds_for_arg (addr, NULL, NULL); | |
3134 | } | |
3135 | ||
d5e254e1 IE |
3136 | targetm.calls.store_returned_bounds (bounds_rtl, bnd); |
3137 | } | |
3138 | else | |
3139 | { | |
3140 | int n; | |
3141 | ||
3142 | gcc_assert (GET_CODE (bounds_rtl) == PARALLEL); | |
3143 | ||
855f036d IE |
3144 | if (bounds) |
3145 | bnd = chkp_expand_zero_bounds (); | |
3146 | else | |
3147 | { | |
3148 | addr = expand_normal (build_fold_addr_expr (retval_rhs)); | |
3149 | addr = gen_rtx_MEM (Pmode, addr); | |
3150 | } | |
d5e254e1 IE |
3151 | |
3152 | for (n = 0; n < XVECLEN (bounds_rtl, 0); n++) | |
3153 | { | |
d5e254e1 | 3154 | rtx slot = XEXP (XVECEXP (bounds_rtl, 0, n), 0); |
855f036d IE |
3155 | if (!bounds) |
3156 | { | |
3157 | rtx offs = XEXP (XVECEXP (bounds_rtl, 0, n), 1); | |
3158 | rtx from = adjust_address (addr, Pmode, INTVAL (offs)); | |
3159 | bnd = targetm.calls.load_bounds_for_arg (from, NULL, NULL); | |
3160 | } | |
d5e254e1 IE |
3161 | targetm.calls.store_returned_bounds (slot, bnd); |
3162 | } | |
3163 | } | |
3164 | } | |
3165 | else if (chkp_function_instrumented_p (current_function_decl) | |
3166 | && !BOUNDED_P (retval_rhs) | |
3167 | && chkp_type_has_pointer (TREE_TYPE (retval_rhs)) | |
3168 | && TREE_CODE (retval_rhs) != RESULT_DECL) | |
3169 | { | |
3170 | rtx addr = expand_normal (build_fold_addr_expr (retval_rhs)); | |
3171 | addr = gen_rtx_MEM (Pmode, addr); | |
3172 | ||
3173 | gcc_assert (MEM_P (result_rtl)); | |
3174 | ||
3175 | chkp_copy_bounds_for_stack_parm (result_rtl, addr, TREE_TYPE (retval_rhs)); | |
3176 | } | |
3177 | ||
862d0b35 DN |
3178 | /* If we are returning the RESULT_DECL, then the value has already |
3179 | been stored into it, so we don't have to do anything special. */ | |
3180 | if (TREE_CODE (retval_rhs) == RESULT_DECL) | |
3181 | expand_value_return (result_rtl); | |
3182 | ||
3183 | /* If the result is an aggregate that is being returned in one (or more) | |
3184 | registers, load the registers here. */ | |
3185 | ||
3186 | else if (retval_rhs != 0 | |
3187 | && TYPE_MODE (TREE_TYPE (retval_rhs)) == BLKmode | |
3188 | && REG_P (result_rtl)) | |
3189 | { | |
3190 | val = copy_blkmode_to_reg (GET_MODE (result_rtl), retval_rhs); | |
3191 | if (val) | |
3192 | { | |
3193 | /* Use the mode of the result value on the return register. */ | |
3194 | PUT_MODE (result_rtl, GET_MODE (val)); | |
3195 | expand_value_return (val); | |
3196 | } | |
3197 | else | |
3198 | expand_null_return (); | |
3199 | } | |
3200 | else if (retval_rhs != 0 | |
3201 | && !VOID_TYPE_P (TREE_TYPE (retval_rhs)) | |
3202 | && (REG_P (result_rtl) | |
3203 | || (GET_CODE (result_rtl) == PARALLEL))) | |
3204 | { | |
9ee5337d EB |
3205 | /* Compute the return value into a temporary (usually a pseudo reg). */ |
3206 | val | |
3207 | = assign_temp (TREE_TYPE (DECL_RESULT (current_function_decl)), 0, 1); | |
862d0b35 DN |
3208 | val = expand_expr (retval_rhs, val, GET_MODE (val), EXPAND_NORMAL); |
3209 | val = force_not_mem (val); | |
862d0b35 DN |
3210 | expand_value_return (val); |
3211 | } | |
3212 | else | |
3213 | { | |
3214 | /* No hard reg used; calculate value into hard return reg. */ | |
3215 | expand_expr (retval, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3216 | expand_value_return (result_rtl); | |
3217 | } | |
3218 | } | |
3219 | ||
28ed065e MM |
3220 | /* A subroutine of expand_gimple_stmt, expanding one gimple statement |
3221 | STMT that doesn't require special handling for outgoing edges. That | |
3222 | is no tailcalls and no GIMPLE_COND. */ | |
3223 | ||
3224 | static void | |
3225 | expand_gimple_stmt_1 (gimple stmt) | |
3226 | { | |
3227 | tree op0; | |
c82fee88 | 3228 | |
5368224f | 3229 | set_curr_insn_location (gimple_location (stmt)); |
c82fee88 | 3230 | |
28ed065e MM |
3231 | switch (gimple_code (stmt)) |
3232 | { | |
3233 | case GIMPLE_GOTO: | |
3234 | op0 = gimple_goto_dest (stmt); | |
3235 | if (TREE_CODE (op0) == LABEL_DECL) | |
3236 | expand_goto (op0); | |
3237 | else | |
3238 | expand_computed_goto (op0); | |
3239 | break; | |
3240 | case GIMPLE_LABEL: | |
538dd0b7 | 3241 | expand_label (gimple_label_label (as_a <glabel *> (stmt))); |
28ed065e MM |
3242 | break; |
3243 | case GIMPLE_NOP: | |
3244 | case GIMPLE_PREDICT: | |
3245 | break; | |
28ed065e | 3246 | case GIMPLE_SWITCH: |
538dd0b7 | 3247 | expand_case (as_a <gswitch *> (stmt)); |
28ed065e MM |
3248 | break; |
3249 | case GIMPLE_ASM: | |
538dd0b7 | 3250 | expand_asm_stmt (as_a <gasm *> (stmt)); |
28ed065e MM |
3251 | break; |
3252 | case GIMPLE_CALL: | |
538dd0b7 | 3253 | expand_call_stmt (as_a <gcall *> (stmt)); |
28ed065e MM |
3254 | break; |
3255 | ||
3256 | case GIMPLE_RETURN: | |
855f036d IE |
3257 | { |
3258 | tree bnd = gimple_return_retbnd (as_a <greturn *> (stmt)); | |
3259 | op0 = gimple_return_retval (as_a <greturn *> (stmt)); | |
28ed065e | 3260 | |
855f036d IE |
3261 | if (op0 && op0 != error_mark_node) |
3262 | { | |
3263 | tree result = DECL_RESULT (current_function_decl); | |
28ed065e | 3264 | |
855f036d IE |
3265 | /* If we are not returning the current function's RESULT_DECL, |
3266 | build an assignment to it. */ | |
3267 | if (op0 != result) | |
3268 | { | |
3269 | /* I believe that a function's RESULT_DECL is unique. */ | |
3270 | gcc_assert (TREE_CODE (op0) != RESULT_DECL); | |
3271 | ||
3272 | /* ??? We'd like to use simply expand_assignment here, | |
3273 | but this fails if the value is of BLKmode but the return | |
3274 | decl is a register. expand_return has special handling | |
3275 | for this combination, which eventually should move | |
3276 | to common code. See comments there. Until then, let's | |
3277 | build a modify expression :-/ */ | |
3278 | op0 = build2 (MODIFY_EXPR, TREE_TYPE (result), | |
3279 | result, op0); | |
3280 | } | |
3281 | /* Mark we have return statement with missing bounds. */ | |
3282 | if (!bnd && chkp_function_instrumented_p (cfun->decl)) | |
3283 | bnd = error_mark_node; | |
3284 | } | |
3285 | ||
3286 | if (!op0) | |
3287 | expand_null_return (); | |
3288 | else | |
3289 | expand_return (op0, bnd); | |
3290 | } | |
28ed065e MM |
3291 | break; |
3292 | ||
3293 | case GIMPLE_ASSIGN: | |
3294 | { | |
538dd0b7 DM |
3295 | gassign *assign_stmt = as_a <gassign *> (stmt); |
3296 | tree lhs = gimple_assign_lhs (assign_stmt); | |
28ed065e MM |
3297 | |
3298 | /* Tree expand used to fiddle with |= and &= of two bitfield | |
3299 | COMPONENT_REFs here. This can't happen with gimple, the LHS | |
3300 | of binary assigns must be a gimple reg. */ | |
3301 | ||
3302 | if (TREE_CODE (lhs) != SSA_NAME | |
3303 | || get_gimple_rhs_class (gimple_expr_code (stmt)) | |
3304 | == GIMPLE_SINGLE_RHS) | |
3305 | { | |
538dd0b7 | 3306 | tree rhs = gimple_assign_rhs1 (assign_stmt); |
28ed065e MM |
3307 | gcc_assert (get_gimple_rhs_class (gimple_expr_code (stmt)) |
3308 | == GIMPLE_SINGLE_RHS); | |
3309 | if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (rhs)) | |
3310 | SET_EXPR_LOCATION (rhs, gimple_location (stmt)); | |
47598145 MM |
3311 | if (TREE_CLOBBER_P (rhs)) |
3312 | /* This is a clobber to mark the going out of scope for | |
3313 | this LHS. */ | |
3314 | ; | |
3315 | else | |
3316 | expand_assignment (lhs, rhs, | |
538dd0b7 DM |
3317 | gimple_assign_nontemporal_move_p ( |
3318 | assign_stmt)); | |
28ed065e MM |
3319 | } |
3320 | else | |
3321 | { | |
3322 | rtx target, temp; | |
538dd0b7 | 3323 | bool nontemporal = gimple_assign_nontemporal_move_p (assign_stmt); |
28ed065e MM |
3324 | struct separate_ops ops; |
3325 | bool promoted = false; | |
3326 | ||
3327 | target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
3328 | if (GET_CODE (target) == SUBREG && SUBREG_PROMOTED_VAR_P (target)) | |
3329 | promoted = true; | |
3330 | ||
538dd0b7 | 3331 | ops.code = gimple_assign_rhs_code (assign_stmt); |
28ed065e | 3332 | ops.type = TREE_TYPE (lhs); |
b0dd8c90 | 3333 | switch (get_gimple_rhs_class (ops.code)) |
28ed065e | 3334 | { |
0354c0c7 | 3335 | case GIMPLE_TERNARY_RHS: |
538dd0b7 | 3336 | ops.op2 = gimple_assign_rhs3 (assign_stmt); |
0354c0c7 | 3337 | /* Fallthru */ |
28ed065e | 3338 | case GIMPLE_BINARY_RHS: |
538dd0b7 | 3339 | ops.op1 = gimple_assign_rhs2 (assign_stmt); |
28ed065e MM |
3340 | /* Fallthru */ |
3341 | case GIMPLE_UNARY_RHS: | |
538dd0b7 | 3342 | ops.op0 = gimple_assign_rhs1 (assign_stmt); |
28ed065e MM |
3343 | break; |
3344 | default: | |
3345 | gcc_unreachable (); | |
3346 | } | |
3347 | ops.location = gimple_location (stmt); | |
3348 | ||
3349 | /* If we want to use a nontemporal store, force the value to | |
3350 | register first. If we store into a promoted register, | |
3351 | don't directly expand to target. */ | |
3352 | temp = nontemporal || promoted ? NULL_RTX : target; | |
3353 | temp = expand_expr_real_2 (&ops, temp, GET_MODE (target), | |
3354 | EXPAND_NORMAL); | |
3355 | ||
3356 | if (temp == target) | |
3357 | ; | |
3358 | else if (promoted) | |
3359 | { | |
362d42dc | 3360 | int unsignedp = SUBREG_PROMOTED_SIGN (target); |
28ed065e MM |
3361 | /* If TEMP is a VOIDmode constant, use convert_modes to make |
3362 | sure that we properly convert it. */ | |
3363 | if (CONSTANT_P (temp) && GET_MODE (temp) == VOIDmode) | |
3364 | { | |
3365 | temp = convert_modes (GET_MODE (target), | |
3366 | TYPE_MODE (ops.type), | |
4e18a7d4 | 3367 | temp, unsignedp); |
28ed065e | 3368 | temp = convert_modes (GET_MODE (SUBREG_REG (target)), |
4e18a7d4 | 3369 | GET_MODE (target), temp, unsignedp); |
28ed065e MM |
3370 | } |
3371 | ||
27be0c32 | 3372 | convert_move (SUBREG_REG (target), temp, unsignedp); |
28ed065e MM |
3373 | } |
3374 | else if (nontemporal && emit_storent_insn (target, temp)) | |
3375 | ; | |
3376 | else | |
3377 | { | |
3378 | temp = force_operand (temp, target); | |
3379 | if (temp != target) | |
3380 | emit_move_insn (target, temp); | |
3381 | } | |
3382 | } | |
3383 | } | |
3384 | break; | |
3385 | ||
3386 | default: | |
3387 | gcc_unreachable (); | |
3388 | } | |
3389 | } | |
3390 | ||
3391 | /* Expand one gimple statement STMT and return the last RTL instruction | |
3392 | before any of the newly generated ones. | |
3393 | ||
3394 | In addition to generating the necessary RTL instructions this also | |
3395 | sets REG_EH_REGION notes if necessary and sets the current source | |
3396 | location for diagnostics. */ | |
3397 | ||
b47aae36 | 3398 | static rtx_insn * |
28ed065e MM |
3399 | expand_gimple_stmt (gimple stmt) |
3400 | { | |
28ed065e | 3401 | location_t saved_location = input_location; |
b47aae36 | 3402 | rtx_insn *last = get_last_insn (); |
c82fee88 | 3403 | int lp_nr; |
28ed065e | 3404 | |
28ed065e MM |
3405 | gcc_assert (cfun); |
3406 | ||
c82fee88 EB |
3407 | /* We need to save and restore the current source location so that errors |
3408 | discovered during expansion are emitted with the right location. But | |
3409 | it would be better if the diagnostic routines used the source location | |
3410 | embedded in the tree nodes rather than globals. */ | |
28ed065e | 3411 | if (gimple_has_location (stmt)) |
c82fee88 | 3412 | input_location = gimple_location (stmt); |
28ed065e MM |
3413 | |
3414 | expand_gimple_stmt_1 (stmt); | |
c82fee88 | 3415 | |
28ed065e MM |
3416 | /* Free any temporaries used to evaluate this statement. */ |
3417 | free_temp_slots (); | |
3418 | ||
3419 | input_location = saved_location; | |
3420 | ||
3421 | /* Mark all insns that may trap. */ | |
1d65f45c RH |
3422 | lp_nr = lookup_stmt_eh_lp (stmt); |
3423 | if (lp_nr) | |
28ed065e | 3424 | { |
b47aae36 | 3425 | rtx_insn *insn; |
28ed065e MM |
3426 | for (insn = next_real_insn (last); insn; |
3427 | insn = next_real_insn (insn)) | |
3428 | { | |
3429 | if (! find_reg_note (insn, REG_EH_REGION, NULL_RTX) | |
3430 | /* If we want exceptions for non-call insns, any | |
3431 | may_trap_p instruction may throw. */ | |
3432 | && GET_CODE (PATTERN (insn)) != CLOBBER | |
3433 | && GET_CODE (PATTERN (insn)) != USE | |
1d65f45c RH |
3434 | && insn_could_throw_p (insn)) |
3435 | make_reg_eh_region_note (insn, 0, lp_nr); | |
28ed065e MM |
3436 | } |
3437 | } | |
3438 | ||
3439 | return last; | |
3440 | } | |
3441 | ||
726a989a | 3442 | /* A subroutine of expand_gimple_basic_block. Expand one GIMPLE_CALL |
224e770b RH |
3443 | that has CALL_EXPR_TAILCALL set. Returns non-null if we actually |
3444 | generated a tail call (something that might be denied by the ABI | |
cea49550 RH |
3445 | rules governing the call; see calls.c). |
3446 | ||
3447 | Sets CAN_FALLTHRU if we generated a *conditional* tail call, and | |
3448 | can still reach the rest of BB. The case here is __builtin_sqrt, | |
3449 | where the NaN result goes through the external function (with a | |
3450 | tailcall) and the normal result happens via a sqrt instruction. */ | |
80c7a9eb RH |
3451 | |
3452 | static basic_block | |
538dd0b7 | 3453 | expand_gimple_tailcall (basic_block bb, gcall *stmt, bool *can_fallthru) |
80c7a9eb | 3454 | { |
b47aae36 | 3455 | rtx_insn *last2, *last; |
224e770b | 3456 | edge e; |
628f6a4e | 3457 | edge_iterator ei; |
224e770b RH |
3458 | int probability; |
3459 | gcov_type count; | |
80c7a9eb | 3460 | |
28ed065e | 3461 | last2 = last = expand_gimple_stmt (stmt); |
80c7a9eb RH |
3462 | |
3463 | for (last = NEXT_INSN (last); last; last = NEXT_INSN (last)) | |
224e770b RH |
3464 | if (CALL_P (last) && SIBLING_CALL_P (last)) |
3465 | goto found; | |
80c7a9eb | 3466 | |
726a989a | 3467 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
b7211528 | 3468 | |
cea49550 | 3469 | *can_fallthru = true; |
224e770b | 3470 | return NULL; |
80c7a9eb | 3471 | |
224e770b RH |
3472 | found: |
3473 | /* ??? Wouldn't it be better to just reset any pending stack adjust? | |
3474 | Any instructions emitted here are about to be deleted. */ | |
3475 | do_pending_stack_adjust (); | |
3476 | ||
3477 | /* Remove any non-eh, non-abnormal edges that don't go to exit. */ | |
3478 | /* ??? I.e. the fallthrough edge. HOWEVER! If there were to be | |
3479 | EH or abnormal edges, we shouldn't have created a tail call in | |
3480 | the first place. So it seems to me we should just be removing | |
3481 | all edges here, or redirecting the existing fallthru edge to | |
3482 | the exit block. */ | |
3483 | ||
224e770b RH |
3484 | probability = 0; |
3485 | count = 0; | |
224e770b | 3486 | |
628f6a4e BE |
3487 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) |
3488 | { | |
224e770b RH |
3489 | if (!(e->flags & (EDGE_ABNORMAL | EDGE_EH))) |
3490 | { | |
fefa31b5 | 3491 | if (e->dest != EXIT_BLOCK_PTR_FOR_FN (cfun)) |
80c7a9eb | 3492 | { |
224e770b RH |
3493 | e->dest->count -= e->count; |
3494 | e->dest->frequency -= EDGE_FREQUENCY (e); | |
3495 | if (e->dest->count < 0) | |
c22cacf3 | 3496 | e->dest->count = 0; |
224e770b | 3497 | if (e->dest->frequency < 0) |
c22cacf3 | 3498 | e->dest->frequency = 0; |
80c7a9eb | 3499 | } |
224e770b RH |
3500 | count += e->count; |
3501 | probability += e->probability; | |
3502 | remove_edge (e); | |
80c7a9eb | 3503 | } |
628f6a4e BE |
3504 | else |
3505 | ei_next (&ei); | |
80c7a9eb RH |
3506 | } |
3507 | ||
224e770b RH |
3508 | /* This is somewhat ugly: the call_expr expander often emits instructions |
3509 | after the sibcall (to perform the function return). These confuse the | |
12eff7b7 | 3510 | find_many_sub_basic_blocks code, so we need to get rid of these. */ |
224e770b | 3511 | last = NEXT_INSN (last); |
341c100f | 3512 | gcc_assert (BARRIER_P (last)); |
cea49550 RH |
3513 | |
3514 | *can_fallthru = false; | |
224e770b RH |
3515 | while (NEXT_INSN (last)) |
3516 | { | |
3517 | /* For instance an sqrt builtin expander expands if with | |
3518 | sibcall in the then and label for `else`. */ | |
3519 | if (LABEL_P (NEXT_INSN (last))) | |
cea49550 RH |
3520 | { |
3521 | *can_fallthru = true; | |
3522 | break; | |
3523 | } | |
224e770b RH |
3524 | delete_insn (NEXT_INSN (last)); |
3525 | } | |
3526 | ||
fefa31b5 DM |
3527 | e = make_edge (bb, EXIT_BLOCK_PTR_FOR_FN (cfun), EDGE_ABNORMAL |
3528 | | EDGE_SIBCALL); | |
224e770b RH |
3529 | e->probability += probability; |
3530 | e->count += count; | |
1130d5e3 | 3531 | BB_END (bb) = last; |
224e770b RH |
3532 | update_bb_for_insn (bb); |
3533 | ||
3534 | if (NEXT_INSN (last)) | |
3535 | { | |
3536 | bb = create_basic_block (NEXT_INSN (last), get_last_insn (), bb); | |
3537 | ||
3538 | last = BB_END (bb); | |
3539 | if (BARRIER_P (last)) | |
1130d5e3 | 3540 | BB_END (bb) = PREV_INSN (last); |
224e770b RH |
3541 | } |
3542 | ||
726a989a | 3543 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
b7211528 | 3544 | |
224e770b | 3545 | return bb; |
80c7a9eb RH |
3546 | } |
3547 | ||
b5b8b0ac AO |
3548 | /* Return the difference between the floor and the truncated result of |
3549 | a signed division by OP1 with remainder MOD. */ | |
3550 | static rtx | |
ef4bddc2 | 3551 | floor_sdiv_adjust (machine_mode mode, rtx mod, rtx op1) |
b5b8b0ac AO |
3552 | { |
3553 | /* (mod != 0 ? (op1 / mod < 0 ? -1 : 0) : 0) */ | |
3554 | return gen_rtx_IF_THEN_ELSE | |
3555 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3556 | gen_rtx_IF_THEN_ELSE | |
3557 | (mode, gen_rtx_LT (BImode, | |
3558 | gen_rtx_DIV (mode, op1, mod), | |
3559 | const0_rtx), | |
3560 | constm1_rtx, const0_rtx), | |
3561 | const0_rtx); | |
3562 | } | |
3563 | ||
3564 | /* Return the difference between the ceil and the truncated result of | |
3565 | a signed division by OP1 with remainder MOD. */ | |
3566 | static rtx | |
ef4bddc2 | 3567 | ceil_sdiv_adjust (machine_mode mode, rtx mod, rtx op1) |
b5b8b0ac AO |
3568 | { |
3569 | /* (mod != 0 ? (op1 / mod > 0 ? 1 : 0) : 0) */ | |
3570 | return gen_rtx_IF_THEN_ELSE | |
3571 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3572 | gen_rtx_IF_THEN_ELSE | |
3573 | (mode, gen_rtx_GT (BImode, | |
3574 | gen_rtx_DIV (mode, op1, mod), | |
3575 | const0_rtx), | |
3576 | const1_rtx, const0_rtx), | |
3577 | const0_rtx); | |
3578 | } | |
3579 | ||
3580 | /* Return the difference between the ceil and the truncated result of | |
3581 | an unsigned division by OP1 with remainder MOD. */ | |
3582 | static rtx | |
ef4bddc2 | 3583 | ceil_udiv_adjust (machine_mode mode, rtx mod, rtx op1 ATTRIBUTE_UNUSED) |
b5b8b0ac AO |
3584 | { |
3585 | /* (mod != 0 ? 1 : 0) */ | |
3586 | return gen_rtx_IF_THEN_ELSE | |
3587 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3588 | const1_rtx, const0_rtx); | |
3589 | } | |
3590 | ||
3591 | /* Return the difference between the rounded and the truncated result | |
3592 | of a signed division by OP1 with remainder MOD. Halfway cases are | |
3593 | rounded away from zero, rather than to the nearest even number. */ | |
3594 | static rtx | |
ef4bddc2 | 3595 | round_sdiv_adjust (machine_mode mode, rtx mod, rtx op1) |
b5b8b0ac AO |
3596 | { |
3597 | /* (abs (mod) >= abs (op1) - abs (mod) | |
3598 | ? (op1 / mod > 0 ? 1 : -1) | |
3599 | : 0) */ | |
3600 | return gen_rtx_IF_THEN_ELSE | |
3601 | (mode, gen_rtx_GE (BImode, gen_rtx_ABS (mode, mod), | |
3602 | gen_rtx_MINUS (mode, | |
3603 | gen_rtx_ABS (mode, op1), | |
3604 | gen_rtx_ABS (mode, mod))), | |
3605 | gen_rtx_IF_THEN_ELSE | |
3606 | (mode, gen_rtx_GT (BImode, | |
3607 | gen_rtx_DIV (mode, op1, mod), | |
3608 | const0_rtx), | |
3609 | const1_rtx, constm1_rtx), | |
3610 | const0_rtx); | |
3611 | } | |
3612 | ||
3613 | /* Return the difference between the rounded and the truncated result | |
3614 | of a unsigned division by OP1 with remainder MOD. Halfway cases | |
3615 | are rounded away from zero, rather than to the nearest even | |
3616 | number. */ | |
3617 | static rtx | |
ef4bddc2 | 3618 | round_udiv_adjust (machine_mode mode, rtx mod, rtx op1) |
b5b8b0ac AO |
3619 | { |
3620 | /* (mod >= op1 - mod ? 1 : 0) */ | |
3621 | return gen_rtx_IF_THEN_ELSE | |
3622 | (mode, gen_rtx_GE (BImode, mod, | |
3623 | gen_rtx_MINUS (mode, op1, mod)), | |
3624 | const1_rtx, const0_rtx); | |
3625 | } | |
3626 | ||
dda2da58 AO |
3627 | /* Convert X to MODE, that must be Pmode or ptr_mode, without emitting |
3628 | any rtl. */ | |
3629 | ||
3630 | static rtx | |
ef4bddc2 | 3631 | convert_debug_memory_address (machine_mode mode, rtx x, |
f61c6f34 | 3632 | addr_space_t as) |
dda2da58 | 3633 | { |
ef4bddc2 | 3634 | machine_mode xmode = GET_MODE (x); |
dda2da58 AO |
3635 | |
3636 | #ifndef POINTERS_EXTEND_UNSIGNED | |
f61c6f34 JJ |
3637 | gcc_assert (mode == Pmode |
3638 | || mode == targetm.addr_space.address_mode (as)); | |
dda2da58 AO |
3639 | gcc_assert (xmode == mode || xmode == VOIDmode); |
3640 | #else | |
f61c6f34 | 3641 | rtx temp; |
f61c6f34 | 3642 | |
639d4bb8 | 3643 | gcc_assert (targetm.addr_space.valid_pointer_mode (mode, as)); |
dda2da58 AO |
3644 | |
3645 | if (GET_MODE (x) == mode || GET_MODE (x) == VOIDmode) | |
3646 | return x; | |
3647 | ||
69660a70 | 3648 | if (GET_MODE_PRECISION (mode) < GET_MODE_PRECISION (xmode)) |
dda2da58 AO |
3649 | x = simplify_gen_subreg (mode, x, xmode, |
3650 | subreg_lowpart_offset | |
3651 | (mode, xmode)); | |
3652 | else if (POINTERS_EXTEND_UNSIGNED > 0) | |
3653 | x = gen_rtx_ZERO_EXTEND (mode, x); | |
3654 | else if (!POINTERS_EXTEND_UNSIGNED) | |
3655 | x = gen_rtx_SIGN_EXTEND (mode, x); | |
3656 | else | |
f61c6f34 JJ |
3657 | { |
3658 | switch (GET_CODE (x)) | |
3659 | { | |
3660 | case SUBREG: | |
3661 | if ((SUBREG_PROMOTED_VAR_P (x) | |
3662 | || (REG_P (SUBREG_REG (x)) && REG_POINTER (SUBREG_REG (x))) | |
3663 | || (GET_CODE (SUBREG_REG (x)) == PLUS | |
3664 | && REG_P (XEXP (SUBREG_REG (x), 0)) | |
3665 | && REG_POINTER (XEXP (SUBREG_REG (x), 0)) | |
3666 | && CONST_INT_P (XEXP (SUBREG_REG (x), 1)))) | |
3667 | && GET_MODE (SUBREG_REG (x)) == mode) | |
3668 | return SUBREG_REG (x); | |
3669 | break; | |
3670 | case LABEL_REF: | |
a827d9b1 | 3671 | temp = gen_rtx_LABEL_REF (mode, LABEL_REF_LABEL (x)); |
f61c6f34 JJ |
3672 | LABEL_REF_NONLOCAL_P (temp) = LABEL_REF_NONLOCAL_P (x); |
3673 | return temp; | |
3674 | case SYMBOL_REF: | |
3675 | temp = shallow_copy_rtx (x); | |
3676 | PUT_MODE (temp, mode); | |
3677 | return temp; | |
3678 | case CONST: | |
3679 | temp = convert_debug_memory_address (mode, XEXP (x, 0), as); | |
3680 | if (temp) | |
3681 | temp = gen_rtx_CONST (mode, temp); | |
3682 | return temp; | |
3683 | case PLUS: | |
3684 | case MINUS: | |
3685 | if (CONST_INT_P (XEXP (x, 1))) | |
3686 | { | |
3687 | temp = convert_debug_memory_address (mode, XEXP (x, 0), as); | |
3688 | if (temp) | |
3689 | return gen_rtx_fmt_ee (GET_CODE (x), mode, temp, XEXP (x, 1)); | |
3690 | } | |
3691 | break; | |
3692 | default: | |
3693 | break; | |
3694 | } | |
3695 | /* Don't know how to express ptr_extend as operation in debug info. */ | |
3696 | return NULL; | |
3697 | } | |
dda2da58 AO |
3698 | #endif /* POINTERS_EXTEND_UNSIGNED */ |
3699 | ||
3700 | return x; | |
3701 | } | |
3702 | ||
dfde35b3 JJ |
3703 | /* Map from SSA_NAMEs to corresponding DEBUG_EXPR_DECLs created |
3704 | by avoid_deep_ter_for_debug. */ | |
3705 | ||
3706 | static hash_map<tree, tree> *deep_ter_debug_map; | |
3707 | ||
3708 | /* Split too deep TER chains for debug stmts using debug temporaries. */ | |
3709 | ||
3710 | static void | |
3711 | avoid_deep_ter_for_debug (gimple stmt, int depth) | |
3712 | { | |
3713 | use_operand_p use_p; | |
3714 | ssa_op_iter iter; | |
3715 | FOR_EACH_SSA_USE_OPERAND (use_p, stmt, iter, SSA_OP_USE) | |
3716 | { | |
3717 | tree use = USE_FROM_PTR (use_p); | |
3718 | if (TREE_CODE (use) != SSA_NAME || SSA_NAME_IS_DEFAULT_DEF (use)) | |
3719 | continue; | |
3720 | gimple g = get_gimple_for_ssa_name (use); | |
3721 | if (g == NULL) | |
3722 | continue; | |
3723 | if (depth > 6 && !stmt_ends_bb_p (g)) | |
3724 | { | |
3725 | if (deep_ter_debug_map == NULL) | |
3726 | deep_ter_debug_map = new hash_map<tree, tree>; | |
3727 | ||
3728 | tree &vexpr = deep_ter_debug_map->get_or_insert (use); | |
3729 | if (vexpr != NULL) | |
3730 | continue; | |
3731 | vexpr = make_node (DEBUG_EXPR_DECL); | |
3732 | gimple def_temp = gimple_build_debug_bind (vexpr, use, g); | |
3733 | DECL_ARTIFICIAL (vexpr) = 1; | |
3734 | TREE_TYPE (vexpr) = TREE_TYPE (use); | |
3735 | DECL_MODE (vexpr) = TYPE_MODE (TREE_TYPE (use)); | |
3736 | gimple_stmt_iterator gsi = gsi_for_stmt (g); | |
3737 | gsi_insert_after (&gsi, def_temp, GSI_NEW_STMT); | |
3738 | avoid_deep_ter_for_debug (def_temp, 0); | |
3739 | } | |
3740 | else | |
3741 | avoid_deep_ter_for_debug (g, depth + 1); | |
3742 | } | |
3743 | } | |
3744 | ||
12c5ffe5 EB |
3745 | /* Return an RTX equivalent to the value of the parameter DECL. */ |
3746 | ||
3747 | static rtx | |
3748 | expand_debug_parm_decl (tree decl) | |
3749 | { | |
3750 | rtx incoming = DECL_INCOMING_RTL (decl); | |
3751 | ||
3752 | if (incoming | |
3753 | && GET_MODE (incoming) != BLKmode | |
3754 | && ((REG_P (incoming) && HARD_REGISTER_P (incoming)) | |
3755 | || (MEM_P (incoming) | |
3756 | && REG_P (XEXP (incoming, 0)) | |
3757 | && HARD_REGISTER_P (XEXP (incoming, 0))))) | |
3758 | { | |
3759 | rtx rtl = gen_rtx_ENTRY_VALUE (GET_MODE (incoming)); | |
3760 | ||
3761 | #ifdef HAVE_window_save | |
3762 | /* DECL_INCOMING_RTL uses the INCOMING_REGNO of parameter registers. | |
3763 | If the target machine has an explicit window save instruction, the | |
3764 | actual entry value is the corresponding OUTGOING_REGNO instead. */ | |
3765 | if (REG_P (incoming) | |
3766 | && OUTGOING_REGNO (REGNO (incoming)) != REGNO (incoming)) | |
3767 | incoming | |
3768 | = gen_rtx_REG_offset (incoming, GET_MODE (incoming), | |
3769 | OUTGOING_REGNO (REGNO (incoming)), 0); | |
3770 | else if (MEM_P (incoming)) | |
3771 | { | |
3772 | rtx reg = XEXP (incoming, 0); | |
3773 | if (OUTGOING_REGNO (REGNO (reg)) != REGNO (reg)) | |
3774 | { | |
3775 | reg = gen_raw_REG (GET_MODE (reg), OUTGOING_REGNO (REGNO (reg))); | |
3776 | incoming = replace_equiv_address_nv (incoming, reg); | |
3777 | } | |
6cfa417f JJ |
3778 | else |
3779 | incoming = copy_rtx (incoming); | |
12c5ffe5 EB |
3780 | } |
3781 | #endif | |
3782 | ||
3783 | ENTRY_VALUE_EXP (rtl) = incoming; | |
3784 | return rtl; | |
3785 | } | |
3786 | ||
3787 | if (incoming | |
3788 | && GET_MODE (incoming) != BLKmode | |
3789 | && !TREE_ADDRESSABLE (decl) | |
3790 | && MEM_P (incoming) | |
3791 | && (XEXP (incoming, 0) == virtual_incoming_args_rtx | |
3792 | || (GET_CODE (XEXP (incoming, 0)) == PLUS | |
3793 | && XEXP (XEXP (incoming, 0), 0) == virtual_incoming_args_rtx | |
3794 | && CONST_INT_P (XEXP (XEXP (incoming, 0), 1))))) | |
6cfa417f | 3795 | return copy_rtx (incoming); |
12c5ffe5 EB |
3796 | |
3797 | return NULL_RTX; | |
3798 | } | |
3799 | ||
3800 | /* Return an RTX equivalent to the value of the tree expression EXP. */ | |
b5b8b0ac AO |
3801 | |
3802 | static rtx | |
3803 | expand_debug_expr (tree exp) | |
3804 | { | |
3805 | rtx op0 = NULL_RTX, op1 = NULL_RTX, op2 = NULL_RTX; | |
ef4bddc2 RS |
3806 | machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); |
3807 | machine_mode inner_mode = VOIDmode; | |
b5b8b0ac | 3808 | int unsignedp = TYPE_UNSIGNED (TREE_TYPE (exp)); |
09e881c9 | 3809 | addr_space_t as; |
b5b8b0ac AO |
3810 | |
3811 | switch (TREE_CODE_CLASS (TREE_CODE (exp))) | |
3812 | { | |
3813 | case tcc_expression: | |
3814 | switch (TREE_CODE (exp)) | |
3815 | { | |
3816 | case COND_EXPR: | |
7ece48b1 | 3817 | case DOT_PROD_EXPR: |
79d652a5 | 3818 | case SAD_EXPR: |
0354c0c7 BS |
3819 | case WIDEN_MULT_PLUS_EXPR: |
3820 | case WIDEN_MULT_MINUS_EXPR: | |
0f59b812 | 3821 | case FMA_EXPR: |
b5b8b0ac AO |
3822 | goto ternary; |
3823 | ||
3824 | case TRUTH_ANDIF_EXPR: | |
3825 | case TRUTH_ORIF_EXPR: | |
3826 | case TRUTH_AND_EXPR: | |
3827 | case TRUTH_OR_EXPR: | |
3828 | case TRUTH_XOR_EXPR: | |
3829 | goto binary; | |
3830 | ||
3831 | case TRUTH_NOT_EXPR: | |
3832 | goto unary; | |
3833 | ||
3834 | default: | |
3835 | break; | |
3836 | } | |
3837 | break; | |
3838 | ||
3839 | ternary: | |
3840 | op2 = expand_debug_expr (TREE_OPERAND (exp, 2)); | |
3841 | if (!op2) | |
3842 | return NULL_RTX; | |
3843 | /* Fall through. */ | |
3844 | ||
3845 | binary: | |
3846 | case tcc_binary: | |
b5b8b0ac AO |
3847 | op1 = expand_debug_expr (TREE_OPERAND (exp, 1)); |
3848 | if (!op1) | |
3849 | return NULL_RTX; | |
26d83bcc JJ |
3850 | switch (TREE_CODE (exp)) |
3851 | { | |
3852 | case LSHIFT_EXPR: | |
3853 | case RSHIFT_EXPR: | |
3854 | case LROTATE_EXPR: | |
3855 | case RROTATE_EXPR: | |
3856 | case WIDEN_LSHIFT_EXPR: | |
3857 | /* Ensure second operand isn't wider than the first one. */ | |
3858 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 1))); | |
3859 | if (SCALAR_INT_MODE_P (inner_mode)) | |
3860 | { | |
3861 | machine_mode opmode = mode; | |
3862 | if (VECTOR_MODE_P (mode)) | |
3863 | opmode = GET_MODE_INNER (mode); | |
3864 | if (SCALAR_INT_MODE_P (opmode) | |
3865 | && (GET_MODE_PRECISION (opmode) | |
3866 | < GET_MODE_PRECISION (inner_mode))) | |
3867 | op1 = simplify_gen_subreg (opmode, op1, inner_mode, | |
3868 | subreg_lowpart_offset (opmode, | |
3869 | inner_mode)); | |
3870 | } | |
3871 | break; | |
3872 | default: | |
3873 | break; | |
3874 | } | |
b5b8b0ac AO |
3875 | /* Fall through. */ |
3876 | ||
3877 | unary: | |
3878 | case tcc_unary: | |
2ba172e0 | 3879 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); |
b5b8b0ac AO |
3880 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); |
3881 | if (!op0) | |
3882 | return NULL_RTX; | |
3883 | break; | |
3884 | ||
871dae34 AO |
3885 | case tcc_comparison: |
3886 | unsignedp = TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
3887 | goto binary; | |
3888 | ||
b5b8b0ac AO |
3889 | case tcc_type: |
3890 | case tcc_statement: | |
3891 | gcc_unreachable (); | |
3892 | ||
3893 | case tcc_constant: | |
3894 | case tcc_exceptional: | |
3895 | case tcc_declaration: | |
3896 | case tcc_reference: | |
3897 | case tcc_vl_exp: | |
3898 | break; | |
3899 | } | |
3900 | ||
3901 | switch (TREE_CODE (exp)) | |
3902 | { | |
3903 | case STRING_CST: | |
3904 | if (!lookup_constant_def (exp)) | |
3905 | { | |
e1b243a8 JJ |
3906 | if (strlen (TREE_STRING_POINTER (exp)) + 1 |
3907 | != (size_t) TREE_STRING_LENGTH (exp)) | |
3908 | return NULL_RTX; | |
b5b8b0ac AO |
3909 | op0 = gen_rtx_CONST_STRING (Pmode, TREE_STRING_POINTER (exp)); |
3910 | op0 = gen_rtx_MEM (BLKmode, op0); | |
3911 | set_mem_attributes (op0, exp, 0); | |
3912 | return op0; | |
3913 | } | |
3914 | /* Fall through... */ | |
3915 | ||
3916 | case INTEGER_CST: | |
3917 | case REAL_CST: | |
3918 | case FIXED_CST: | |
3919 | op0 = expand_expr (exp, NULL_RTX, mode, EXPAND_INITIALIZER); | |
3920 | return op0; | |
3921 | ||
3922 | case COMPLEX_CST: | |
3923 | gcc_assert (COMPLEX_MODE_P (mode)); | |
3924 | op0 = expand_debug_expr (TREE_REALPART (exp)); | |
b5b8b0ac | 3925 | op1 = expand_debug_expr (TREE_IMAGPART (exp)); |
b5b8b0ac AO |
3926 | return gen_rtx_CONCAT (mode, op0, op1); |
3927 | ||
0ca5af51 AO |
3928 | case DEBUG_EXPR_DECL: |
3929 | op0 = DECL_RTL_IF_SET (exp); | |
3930 | ||
3931 | if (op0) | |
3932 | return op0; | |
3933 | ||
3934 | op0 = gen_rtx_DEBUG_EXPR (mode); | |
e4fb38bd | 3935 | DEBUG_EXPR_TREE_DECL (op0) = exp; |
0ca5af51 AO |
3936 | SET_DECL_RTL (exp, op0); |
3937 | ||
3938 | return op0; | |
3939 | ||
b5b8b0ac AO |
3940 | case VAR_DECL: |
3941 | case PARM_DECL: | |
3942 | case FUNCTION_DECL: | |
3943 | case LABEL_DECL: | |
3944 | case CONST_DECL: | |
3945 | case RESULT_DECL: | |
3946 | op0 = DECL_RTL_IF_SET (exp); | |
3947 | ||
3948 | /* This decl was probably optimized away. */ | |
3949 | if (!op0) | |
e1b243a8 JJ |
3950 | { |
3951 | if (TREE_CODE (exp) != VAR_DECL | |
3952 | || DECL_EXTERNAL (exp) | |
3953 | || !TREE_STATIC (exp) | |
3954 | || !DECL_NAME (exp) | |
0fba566c | 3955 | || DECL_HARD_REGISTER (exp) |
7d5fc814 | 3956 | || DECL_IN_CONSTANT_POOL (exp) |
0fba566c | 3957 | || mode == VOIDmode) |
e1b243a8 JJ |
3958 | return NULL; |
3959 | ||
b1aa0655 | 3960 | op0 = make_decl_rtl_for_debug (exp); |
e1b243a8 JJ |
3961 | if (!MEM_P (op0) |
3962 | || GET_CODE (XEXP (op0, 0)) != SYMBOL_REF | |
3963 | || SYMBOL_REF_DECL (XEXP (op0, 0)) != exp) | |
3964 | return NULL; | |
3965 | } | |
3966 | else | |
3967 | op0 = copy_rtx (op0); | |
b5b8b0ac | 3968 | |
06796564 | 3969 | if (GET_MODE (op0) == BLKmode |
871dae34 | 3970 | /* If op0 is not BLKmode, but mode is, adjust_mode |
06796564 JJ |
3971 | below would ICE. While it is likely a FE bug, |
3972 | try to be robust here. See PR43166. */ | |
132b4e82 JJ |
3973 | || mode == BLKmode |
3974 | || (mode == VOIDmode && GET_MODE (op0) != VOIDmode)) | |
b5b8b0ac AO |
3975 | { |
3976 | gcc_assert (MEM_P (op0)); | |
3977 | op0 = adjust_address_nv (op0, mode, 0); | |
3978 | return op0; | |
3979 | } | |
3980 | ||
3981 | /* Fall through. */ | |
3982 | ||
3983 | adjust_mode: | |
3984 | case PAREN_EXPR: | |
625a9766 | 3985 | CASE_CONVERT: |
b5b8b0ac | 3986 | { |
2ba172e0 | 3987 | inner_mode = GET_MODE (op0); |
b5b8b0ac AO |
3988 | |
3989 | if (mode == inner_mode) | |
3990 | return op0; | |
3991 | ||
3992 | if (inner_mode == VOIDmode) | |
3993 | { | |
2a8e30fb MM |
3994 | if (TREE_CODE (exp) == SSA_NAME) |
3995 | inner_mode = TYPE_MODE (TREE_TYPE (exp)); | |
3996 | else | |
3997 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
b5b8b0ac AO |
3998 | if (mode == inner_mode) |
3999 | return op0; | |
4000 | } | |
4001 | ||
4002 | if (FLOAT_MODE_P (mode) && FLOAT_MODE_P (inner_mode)) | |
4003 | { | |
4004 | if (GET_MODE_BITSIZE (mode) == GET_MODE_BITSIZE (inner_mode)) | |
4005 | op0 = simplify_gen_subreg (mode, op0, inner_mode, 0); | |
4006 | else if (GET_MODE_BITSIZE (mode) < GET_MODE_BITSIZE (inner_mode)) | |
4007 | op0 = simplify_gen_unary (FLOAT_TRUNCATE, mode, op0, inner_mode); | |
4008 | else | |
4009 | op0 = simplify_gen_unary (FLOAT_EXTEND, mode, op0, inner_mode); | |
4010 | } | |
4011 | else if (FLOAT_MODE_P (mode)) | |
4012 | { | |
2a8e30fb | 4013 | gcc_assert (TREE_CODE (exp) != SSA_NAME); |
b5b8b0ac AO |
4014 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
4015 | op0 = simplify_gen_unary (UNSIGNED_FLOAT, mode, op0, inner_mode); | |
4016 | else | |
4017 | op0 = simplify_gen_unary (FLOAT, mode, op0, inner_mode); | |
4018 | } | |
4019 | else if (FLOAT_MODE_P (inner_mode)) | |
4020 | { | |
4021 | if (unsignedp) | |
4022 | op0 = simplify_gen_unary (UNSIGNED_FIX, mode, op0, inner_mode); | |
4023 | else | |
4024 | op0 = simplify_gen_unary (FIX, mode, op0, inner_mode); | |
4025 | } | |
4026 | else if (CONSTANT_P (op0) | |
69660a70 | 4027 | || GET_MODE_PRECISION (mode) <= GET_MODE_PRECISION (inner_mode)) |
b5b8b0ac AO |
4028 | op0 = simplify_gen_subreg (mode, op0, inner_mode, |
4029 | subreg_lowpart_offset (mode, | |
4030 | inner_mode)); | |
cf4ef6f7 | 4031 | else if (UNARY_CLASS_P (exp) |
1b47fe3f JJ |
4032 | ? TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))) |
4033 | : unsignedp) | |
2ba172e0 | 4034 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); |
b5b8b0ac | 4035 | else |
2ba172e0 | 4036 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); |
b5b8b0ac AO |
4037 | |
4038 | return op0; | |
4039 | } | |
4040 | ||
70f34814 | 4041 | case MEM_REF: |
71f3a3f5 JJ |
4042 | if (!is_gimple_mem_ref_addr (TREE_OPERAND (exp, 0))) |
4043 | { | |
4044 | tree newexp = fold_binary (MEM_REF, TREE_TYPE (exp), | |
4045 | TREE_OPERAND (exp, 0), | |
4046 | TREE_OPERAND (exp, 1)); | |
4047 | if (newexp) | |
4048 | return expand_debug_expr (newexp); | |
4049 | } | |
4050 | /* FALLTHROUGH */ | |
b5b8b0ac | 4051 | case INDIRECT_REF: |
0a81f074 | 4052 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); |
b5b8b0ac AO |
4053 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); |
4054 | if (!op0) | |
4055 | return NULL; | |
4056 | ||
cb115041 JJ |
4057 | if (TREE_CODE (exp) == MEM_REF) |
4058 | { | |
583ac69c JJ |
4059 | if (GET_CODE (op0) == DEBUG_IMPLICIT_PTR |
4060 | || (GET_CODE (op0) == PLUS | |
4061 | && GET_CODE (XEXP (op0, 0)) == DEBUG_IMPLICIT_PTR)) | |
4062 | /* (mem (debug_implicit_ptr)) might confuse aliasing. | |
4063 | Instead just use get_inner_reference. */ | |
4064 | goto component_ref; | |
4065 | ||
cb115041 JJ |
4066 | op1 = expand_debug_expr (TREE_OPERAND (exp, 1)); |
4067 | if (!op1 || !CONST_INT_P (op1)) | |
4068 | return NULL; | |
4069 | ||
0a81f074 | 4070 | op0 = plus_constant (inner_mode, op0, INTVAL (op1)); |
cb115041 JJ |
4071 | } |
4072 | ||
a148c4b2 | 4073 | as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))); |
b5b8b0ac | 4074 | |
f61c6f34 JJ |
4075 | op0 = convert_debug_memory_address (targetm.addr_space.address_mode (as), |
4076 | op0, as); | |
4077 | if (op0 == NULL_RTX) | |
4078 | return NULL; | |
b5b8b0ac | 4079 | |
f61c6f34 | 4080 | op0 = gen_rtx_MEM (mode, op0); |
b5b8b0ac | 4081 | set_mem_attributes (op0, exp, 0); |
71f3a3f5 JJ |
4082 | if (TREE_CODE (exp) == MEM_REF |
4083 | && !is_gimple_mem_ref_addr (TREE_OPERAND (exp, 0))) | |
4084 | set_mem_expr (op0, NULL_TREE); | |
09e881c9 | 4085 | set_mem_addr_space (op0, as); |
b5b8b0ac AO |
4086 | |
4087 | return op0; | |
4088 | ||
4089 | case TARGET_MEM_REF: | |
4d948885 RG |
4090 | if (TREE_CODE (TMR_BASE (exp)) == ADDR_EXPR |
4091 | && !DECL_RTL_SET_P (TREE_OPERAND (TMR_BASE (exp), 0))) | |
b5b8b0ac AO |
4092 | return NULL; |
4093 | ||
4094 | op0 = expand_debug_expr | |
4e25ca6b | 4095 | (tree_mem_ref_addr (build_pointer_type (TREE_TYPE (exp)), exp)); |
b5b8b0ac AO |
4096 | if (!op0) |
4097 | return NULL; | |
4098 | ||
c168f180 | 4099 | as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0)))); |
f61c6f34 JJ |
4100 | op0 = convert_debug_memory_address (targetm.addr_space.address_mode (as), |
4101 | op0, as); | |
4102 | if (op0 == NULL_RTX) | |
4103 | return NULL; | |
b5b8b0ac AO |
4104 | |
4105 | op0 = gen_rtx_MEM (mode, op0); | |
4106 | ||
4107 | set_mem_attributes (op0, exp, 0); | |
09e881c9 | 4108 | set_mem_addr_space (op0, as); |
b5b8b0ac AO |
4109 | |
4110 | return op0; | |
4111 | ||
583ac69c | 4112 | component_ref: |
b5b8b0ac AO |
4113 | case ARRAY_REF: |
4114 | case ARRAY_RANGE_REF: | |
4115 | case COMPONENT_REF: | |
4116 | case BIT_FIELD_REF: | |
4117 | case REALPART_EXPR: | |
4118 | case IMAGPART_EXPR: | |
4119 | case VIEW_CONVERT_EXPR: | |
4120 | { | |
ef4bddc2 | 4121 | machine_mode mode1; |
b5b8b0ac AO |
4122 | HOST_WIDE_INT bitsize, bitpos; |
4123 | tree offset; | |
4124 | int volatilep = 0; | |
4125 | tree tem = get_inner_reference (exp, &bitsize, &bitpos, &offset, | |
b3ecff82 | 4126 | &mode1, &unsignedp, &volatilep, false); |
b5b8b0ac AO |
4127 | rtx orig_op0; |
4128 | ||
4f2a9af8 JJ |
4129 | if (bitsize == 0) |
4130 | return NULL; | |
4131 | ||
b5b8b0ac AO |
4132 | orig_op0 = op0 = expand_debug_expr (tem); |
4133 | ||
4134 | if (!op0) | |
4135 | return NULL; | |
4136 | ||
4137 | if (offset) | |
4138 | { | |
ef4bddc2 | 4139 | machine_mode addrmode, offmode; |
dda2da58 | 4140 | |
aa847cc8 JJ |
4141 | if (!MEM_P (op0)) |
4142 | return NULL; | |
b5b8b0ac | 4143 | |
dda2da58 AO |
4144 | op0 = XEXP (op0, 0); |
4145 | addrmode = GET_MODE (op0); | |
4146 | if (addrmode == VOIDmode) | |
4147 | addrmode = Pmode; | |
4148 | ||
b5b8b0ac AO |
4149 | op1 = expand_debug_expr (offset); |
4150 | if (!op1) | |
4151 | return NULL; | |
4152 | ||
dda2da58 AO |
4153 | offmode = GET_MODE (op1); |
4154 | if (offmode == VOIDmode) | |
4155 | offmode = TYPE_MODE (TREE_TYPE (offset)); | |
4156 | ||
4157 | if (addrmode != offmode) | |
4158 | op1 = simplify_gen_subreg (addrmode, op1, offmode, | |
4159 | subreg_lowpart_offset (addrmode, | |
4160 | offmode)); | |
4161 | ||
4162 | /* Don't use offset_address here, we don't need a | |
4163 | recognizable address, and we don't want to generate | |
4164 | code. */ | |
2ba172e0 JJ |
4165 | op0 = gen_rtx_MEM (mode, simplify_gen_binary (PLUS, addrmode, |
4166 | op0, op1)); | |
b5b8b0ac AO |
4167 | } |
4168 | ||
4169 | if (MEM_P (op0)) | |
4170 | { | |
4f2a9af8 JJ |
4171 | if (mode1 == VOIDmode) |
4172 | /* Bitfield. */ | |
4173 | mode1 = smallest_mode_for_size (bitsize, MODE_INT); | |
b5b8b0ac AO |
4174 | if (bitpos >= BITS_PER_UNIT) |
4175 | { | |
4176 | op0 = adjust_address_nv (op0, mode1, bitpos / BITS_PER_UNIT); | |
4177 | bitpos %= BITS_PER_UNIT; | |
4178 | } | |
4179 | else if (bitpos < 0) | |
4180 | { | |
4f2a9af8 JJ |
4181 | HOST_WIDE_INT units |
4182 | = (-bitpos + BITS_PER_UNIT - 1) / BITS_PER_UNIT; | |
b5b8b0ac AO |
4183 | op0 = adjust_address_nv (op0, mode1, units); |
4184 | bitpos += units * BITS_PER_UNIT; | |
4185 | } | |
4186 | else if (bitpos == 0 && bitsize == GET_MODE_BITSIZE (mode)) | |
4187 | op0 = adjust_address_nv (op0, mode, 0); | |
4188 | else if (GET_MODE (op0) != mode1) | |
4189 | op0 = adjust_address_nv (op0, mode1, 0); | |
4190 | else | |
4191 | op0 = copy_rtx (op0); | |
4192 | if (op0 == orig_op0) | |
4193 | op0 = shallow_copy_rtx (op0); | |
4194 | set_mem_attributes (op0, exp, 0); | |
4195 | } | |
4196 | ||
4197 | if (bitpos == 0 && mode == GET_MODE (op0)) | |
4198 | return op0; | |
4199 | ||
2d3fc6aa JJ |
4200 | if (bitpos < 0) |
4201 | return NULL; | |
4202 | ||
88c04a5d JJ |
4203 | if (GET_MODE (op0) == BLKmode) |
4204 | return NULL; | |
4205 | ||
b5b8b0ac AO |
4206 | if ((bitpos % BITS_PER_UNIT) == 0 |
4207 | && bitsize == GET_MODE_BITSIZE (mode1)) | |
4208 | { | |
ef4bddc2 | 4209 | machine_mode opmode = GET_MODE (op0); |
b5b8b0ac | 4210 | |
b5b8b0ac | 4211 | if (opmode == VOIDmode) |
9712cba0 | 4212 | opmode = TYPE_MODE (TREE_TYPE (tem)); |
b5b8b0ac AO |
4213 | |
4214 | /* This condition may hold if we're expanding the address | |
4215 | right past the end of an array that turned out not to | |
4216 | be addressable (i.e., the address was only computed in | |
4217 | debug stmts). The gen_subreg below would rightfully | |
4218 | crash, and the address doesn't really exist, so just | |
4219 | drop it. */ | |
4220 | if (bitpos >= GET_MODE_BITSIZE (opmode)) | |
4221 | return NULL; | |
4222 | ||
7d5d39bb JJ |
4223 | if ((bitpos % GET_MODE_BITSIZE (mode)) == 0) |
4224 | return simplify_gen_subreg (mode, op0, opmode, | |
4225 | bitpos / BITS_PER_UNIT); | |
b5b8b0ac AO |
4226 | } |
4227 | ||
4228 | return simplify_gen_ternary (SCALAR_INT_MODE_P (GET_MODE (op0)) | |
4229 | && TYPE_UNSIGNED (TREE_TYPE (exp)) | |
4230 | ? SIGN_EXTRACT | |
4231 | : ZERO_EXTRACT, mode, | |
4232 | GET_MODE (op0) != VOIDmode | |
9712cba0 JJ |
4233 | ? GET_MODE (op0) |
4234 | : TYPE_MODE (TREE_TYPE (tem)), | |
b5b8b0ac AO |
4235 | op0, GEN_INT (bitsize), GEN_INT (bitpos)); |
4236 | } | |
4237 | ||
b5b8b0ac | 4238 | case ABS_EXPR: |
2ba172e0 | 4239 | return simplify_gen_unary (ABS, mode, op0, mode); |
b5b8b0ac AO |
4240 | |
4241 | case NEGATE_EXPR: | |
2ba172e0 | 4242 | return simplify_gen_unary (NEG, mode, op0, mode); |
b5b8b0ac AO |
4243 | |
4244 | case BIT_NOT_EXPR: | |
2ba172e0 | 4245 | return simplify_gen_unary (NOT, mode, op0, mode); |
b5b8b0ac AO |
4246 | |
4247 | case FLOAT_EXPR: | |
2ba172e0 JJ |
4248 | return simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, |
4249 | 0))) | |
4250 | ? UNSIGNED_FLOAT : FLOAT, mode, op0, | |
4251 | inner_mode); | |
b5b8b0ac AO |
4252 | |
4253 | case FIX_TRUNC_EXPR: | |
2ba172e0 JJ |
4254 | return simplify_gen_unary (unsignedp ? UNSIGNED_FIX : FIX, mode, op0, |
4255 | inner_mode); | |
b5b8b0ac AO |
4256 | |
4257 | case POINTER_PLUS_EXPR: | |
576319a7 DD |
4258 | /* For the rare target where pointers are not the same size as |
4259 | size_t, we need to check for mis-matched modes and correct | |
4260 | the addend. */ | |
4261 | if (op0 && op1 | |
4262 | && GET_MODE (op0) != VOIDmode && GET_MODE (op1) != VOIDmode | |
4263 | && GET_MODE (op0) != GET_MODE (op1)) | |
4264 | { | |
8369f38a DD |
4265 | if (GET_MODE_BITSIZE (GET_MODE (op0)) < GET_MODE_BITSIZE (GET_MODE (op1)) |
4266 | /* If OP0 is a partial mode, then we must truncate, even if it has | |
4267 | the same bitsize as OP1 as GCC's representation of partial modes | |
4268 | is opaque. */ | |
4269 | || (GET_MODE_CLASS (GET_MODE (op0)) == MODE_PARTIAL_INT | |
4270 | && GET_MODE_BITSIZE (GET_MODE (op0)) == GET_MODE_BITSIZE (GET_MODE (op1)))) | |
2ba172e0 JJ |
4271 | op1 = simplify_gen_unary (TRUNCATE, GET_MODE (op0), op1, |
4272 | GET_MODE (op1)); | |
576319a7 DD |
4273 | else |
4274 | /* We always sign-extend, regardless of the signedness of | |
4275 | the operand, because the operand is always unsigned | |
4276 | here even if the original C expression is signed. */ | |
2ba172e0 JJ |
4277 | op1 = simplify_gen_unary (SIGN_EXTEND, GET_MODE (op0), op1, |
4278 | GET_MODE (op1)); | |
576319a7 DD |
4279 | } |
4280 | /* Fall through. */ | |
b5b8b0ac | 4281 | case PLUS_EXPR: |
2ba172e0 | 4282 | return simplify_gen_binary (PLUS, mode, op0, op1); |
b5b8b0ac AO |
4283 | |
4284 | case MINUS_EXPR: | |
2ba172e0 | 4285 | return simplify_gen_binary (MINUS, mode, op0, op1); |
b5b8b0ac AO |
4286 | |
4287 | case MULT_EXPR: | |
2ba172e0 | 4288 | return simplify_gen_binary (MULT, mode, op0, op1); |
b5b8b0ac AO |
4289 | |
4290 | case RDIV_EXPR: | |
4291 | case TRUNC_DIV_EXPR: | |
4292 | case EXACT_DIV_EXPR: | |
4293 | if (unsignedp) | |
2ba172e0 | 4294 | return simplify_gen_binary (UDIV, mode, op0, op1); |
b5b8b0ac | 4295 | else |
2ba172e0 | 4296 | return simplify_gen_binary (DIV, mode, op0, op1); |
b5b8b0ac AO |
4297 | |
4298 | case TRUNC_MOD_EXPR: | |
2ba172e0 | 4299 | return simplify_gen_binary (unsignedp ? UMOD : MOD, mode, op0, op1); |
b5b8b0ac AO |
4300 | |
4301 | case FLOOR_DIV_EXPR: | |
4302 | if (unsignedp) | |
2ba172e0 | 4303 | return simplify_gen_binary (UDIV, mode, op0, op1); |
b5b8b0ac AO |
4304 | else |
4305 | { | |
2ba172e0 JJ |
4306 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4307 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4308 | rtx adj = floor_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4309 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4310 | } |
4311 | ||
4312 | case FLOOR_MOD_EXPR: | |
4313 | if (unsignedp) | |
2ba172e0 | 4314 | return simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac AO |
4315 | else |
4316 | { | |
2ba172e0 | 4317 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4318 | rtx adj = floor_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4319 | adj = simplify_gen_unary (NEG, mode, |
4320 | simplify_gen_binary (MULT, mode, adj, op1), | |
4321 | mode); | |
4322 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4323 | } |
4324 | ||
4325 | case CEIL_DIV_EXPR: | |
4326 | if (unsignedp) | |
4327 | { | |
2ba172e0 JJ |
4328 | rtx div = simplify_gen_binary (UDIV, mode, op0, op1); |
4329 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); | |
b5b8b0ac | 4330 | rtx adj = ceil_udiv_adjust (mode, mod, op1); |
2ba172e0 | 4331 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4332 | } |
4333 | else | |
4334 | { | |
2ba172e0 JJ |
4335 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4336 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4337 | rtx adj = ceil_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4338 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4339 | } |
4340 | ||
4341 | case CEIL_MOD_EXPR: | |
4342 | if (unsignedp) | |
4343 | { | |
2ba172e0 | 4344 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac | 4345 | rtx adj = ceil_udiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4346 | adj = simplify_gen_unary (NEG, mode, |
4347 | simplify_gen_binary (MULT, mode, adj, op1), | |
4348 | mode); | |
4349 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4350 | } |
4351 | else | |
4352 | { | |
2ba172e0 | 4353 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4354 | rtx adj = ceil_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4355 | adj = simplify_gen_unary (NEG, mode, |
4356 | simplify_gen_binary (MULT, mode, adj, op1), | |
4357 | mode); | |
4358 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4359 | } |
4360 | ||
4361 | case ROUND_DIV_EXPR: | |
4362 | if (unsignedp) | |
4363 | { | |
2ba172e0 JJ |
4364 | rtx div = simplify_gen_binary (UDIV, mode, op0, op1); |
4365 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); | |
b5b8b0ac | 4366 | rtx adj = round_udiv_adjust (mode, mod, op1); |
2ba172e0 | 4367 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4368 | } |
4369 | else | |
4370 | { | |
2ba172e0 JJ |
4371 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4372 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4373 | rtx adj = round_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4374 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4375 | } |
4376 | ||
4377 | case ROUND_MOD_EXPR: | |
4378 | if (unsignedp) | |
4379 | { | |
2ba172e0 | 4380 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac | 4381 | rtx adj = round_udiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4382 | adj = simplify_gen_unary (NEG, mode, |
4383 | simplify_gen_binary (MULT, mode, adj, op1), | |
4384 | mode); | |
4385 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4386 | } |
4387 | else | |
4388 | { | |
2ba172e0 | 4389 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4390 | rtx adj = round_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4391 | adj = simplify_gen_unary (NEG, mode, |
4392 | simplify_gen_binary (MULT, mode, adj, op1), | |
4393 | mode); | |
4394 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4395 | } |
4396 | ||
4397 | case LSHIFT_EXPR: | |
2ba172e0 | 4398 | return simplify_gen_binary (ASHIFT, mode, op0, op1); |
b5b8b0ac AO |
4399 | |
4400 | case RSHIFT_EXPR: | |
4401 | if (unsignedp) | |
2ba172e0 | 4402 | return simplify_gen_binary (LSHIFTRT, mode, op0, op1); |
b5b8b0ac | 4403 | else |
2ba172e0 | 4404 | return simplify_gen_binary (ASHIFTRT, mode, op0, op1); |
b5b8b0ac AO |
4405 | |
4406 | case LROTATE_EXPR: | |
2ba172e0 | 4407 | return simplify_gen_binary (ROTATE, mode, op0, op1); |
b5b8b0ac AO |
4408 | |
4409 | case RROTATE_EXPR: | |
2ba172e0 | 4410 | return simplify_gen_binary (ROTATERT, mode, op0, op1); |
b5b8b0ac AO |
4411 | |
4412 | case MIN_EXPR: | |
2ba172e0 | 4413 | return simplify_gen_binary (unsignedp ? UMIN : SMIN, mode, op0, op1); |
b5b8b0ac AO |
4414 | |
4415 | case MAX_EXPR: | |
2ba172e0 | 4416 | return simplify_gen_binary (unsignedp ? UMAX : SMAX, mode, op0, op1); |
b5b8b0ac AO |
4417 | |
4418 | case BIT_AND_EXPR: | |
4419 | case TRUTH_AND_EXPR: | |
2ba172e0 | 4420 | return simplify_gen_binary (AND, mode, op0, op1); |
b5b8b0ac AO |
4421 | |
4422 | case BIT_IOR_EXPR: | |
4423 | case TRUTH_OR_EXPR: | |
2ba172e0 | 4424 | return simplify_gen_binary (IOR, mode, op0, op1); |
b5b8b0ac AO |
4425 | |
4426 | case BIT_XOR_EXPR: | |
4427 | case TRUTH_XOR_EXPR: | |
2ba172e0 | 4428 | return simplify_gen_binary (XOR, mode, op0, op1); |
b5b8b0ac AO |
4429 | |
4430 | case TRUTH_ANDIF_EXPR: | |
4431 | return gen_rtx_IF_THEN_ELSE (mode, op0, op1, const0_rtx); | |
4432 | ||
4433 | case TRUTH_ORIF_EXPR: | |
4434 | return gen_rtx_IF_THEN_ELSE (mode, op0, const_true_rtx, op1); | |
4435 | ||
4436 | case TRUTH_NOT_EXPR: | |
2ba172e0 | 4437 | return simplify_gen_relational (EQ, mode, inner_mode, op0, const0_rtx); |
b5b8b0ac AO |
4438 | |
4439 | case LT_EXPR: | |
2ba172e0 JJ |
4440 | return simplify_gen_relational (unsignedp ? LTU : LT, mode, inner_mode, |
4441 | op0, op1); | |
b5b8b0ac AO |
4442 | |
4443 | case LE_EXPR: | |
2ba172e0 JJ |
4444 | return simplify_gen_relational (unsignedp ? LEU : LE, mode, inner_mode, |
4445 | op0, op1); | |
b5b8b0ac AO |
4446 | |
4447 | case GT_EXPR: | |
2ba172e0 JJ |
4448 | return simplify_gen_relational (unsignedp ? GTU : GT, mode, inner_mode, |
4449 | op0, op1); | |
b5b8b0ac AO |
4450 | |
4451 | case GE_EXPR: | |
2ba172e0 JJ |
4452 | return simplify_gen_relational (unsignedp ? GEU : GE, mode, inner_mode, |
4453 | op0, op1); | |
b5b8b0ac AO |
4454 | |
4455 | case EQ_EXPR: | |
2ba172e0 | 4456 | return simplify_gen_relational (EQ, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4457 | |
4458 | case NE_EXPR: | |
2ba172e0 | 4459 | return simplify_gen_relational (NE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4460 | |
4461 | case UNORDERED_EXPR: | |
2ba172e0 | 4462 | return simplify_gen_relational (UNORDERED, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4463 | |
4464 | case ORDERED_EXPR: | |
2ba172e0 | 4465 | return simplify_gen_relational (ORDERED, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4466 | |
4467 | case UNLT_EXPR: | |
2ba172e0 | 4468 | return simplify_gen_relational (UNLT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4469 | |
4470 | case UNLE_EXPR: | |
2ba172e0 | 4471 | return simplify_gen_relational (UNLE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4472 | |
4473 | case UNGT_EXPR: | |
2ba172e0 | 4474 | return simplify_gen_relational (UNGT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4475 | |
4476 | case UNGE_EXPR: | |
2ba172e0 | 4477 | return simplify_gen_relational (UNGE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4478 | |
4479 | case UNEQ_EXPR: | |
2ba172e0 | 4480 | return simplify_gen_relational (UNEQ, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4481 | |
4482 | case LTGT_EXPR: | |
2ba172e0 | 4483 | return simplify_gen_relational (LTGT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4484 | |
4485 | case COND_EXPR: | |
4486 | return gen_rtx_IF_THEN_ELSE (mode, op0, op1, op2); | |
4487 | ||
4488 | case COMPLEX_EXPR: | |
4489 | gcc_assert (COMPLEX_MODE_P (mode)); | |
4490 | if (GET_MODE (op0) == VOIDmode) | |
4491 | op0 = gen_rtx_CONST (GET_MODE_INNER (mode), op0); | |
4492 | if (GET_MODE (op1) == VOIDmode) | |
4493 | op1 = gen_rtx_CONST (GET_MODE_INNER (mode), op1); | |
4494 | return gen_rtx_CONCAT (mode, op0, op1); | |
4495 | ||
d02a5a4b JJ |
4496 | case CONJ_EXPR: |
4497 | if (GET_CODE (op0) == CONCAT) | |
4498 | return gen_rtx_CONCAT (mode, XEXP (op0, 0), | |
2ba172e0 JJ |
4499 | simplify_gen_unary (NEG, GET_MODE_INNER (mode), |
4500 | XEXP (op0, 1), | |
4501 | GET_MODE_INNER (mode))); | |
d02a5a4b JJ |
4502 | else |
4503 | { | |
ef4bddc2 | 4504 | machine_mode imode = GET_MODE_INNER (mode); |
d02a5a4b JJ |
4505 | rtx re, im; |
4506 | ||
4507 | if (MEM_P (op0)) | |
4508 | { | |
4509 | re = adjust_address_nv (op0, imode, 0); | |
4510 | im = adjust_address_nv (op0, imode, GET_MODE_SIZE (imode)); | |
4511 | } | |
4512 | else | |
4513 | { | |
ef4bddc2 RS |
4514 | machine_mode ifmode = int_mode_for_mode (mode); |
4515 | machine_mode ihmode = int_mode_for_mode (imode); | |
d02a5a4b JJ |
4516 | rtx halfsize; |
4517 | if (ifmode == BLKmode || ihmode == BLKmode) | |
4518 | return NULL; | |
4519 | halfsize = GEN_INT (GET_MODE_BITSIZE (ihmode)); | |
4520 | re = op0; | |
4521 | if (mode != ifmode) | |
4522 | re = gen_rtx_SUBREG (ifmode, re, 0); | |
4523 | re = gen_rtx_ZERO_EXTRACT (ihmode, re, halfsize, const0_rtx); | |
4524 | if (imode != ihmode) | |
4525 | re = gen_rtx_SUBREG (imode, re, 0); | |
4526 | im = copy_rtx (op0); | |
4527 | if (mode != ifmode) | |
4528 | im = gen_rtx_SUBREG (ifmode, im, 0); | |
4529 | im = gen_rtx_ZERO_EXTRACT (ihmode, im, halfsize, halfsize); | |
4530 | if (imode != ihmode) | |
4531 | im = gen_rtx_SUBREG (imode, im, 0); | |
4532 | } | |
4533 | im = gen_rtx_NEG (imode, im); | |
4534 | return gen_rtx_CONCAT (mode, re, im); | |
4535 | } | |
4536 | ||
b5b8b0ac AO |
4537 | case ADDR_EXPR: |
4538 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); | |
4539 | if (!op0 || !MEM_P (op0)) | |
c8a27c40 JJ |
4540 | { |
4541 | if ((TREE_CODE (TREE_OPERAND (exp, 0)) == VAR_DECL | |
4542 | || TREE_CODE (TREE_OPERAND (exp, 0)) == PARM_DECL | |
4543 | || TREE_CODE (TREE_OPERAND (exp, 0)) == RESULT_DECL) | |
f8cca67b JJ |
4544 | && (!TREE_ADDRESSABLE (TREE_OPERAND (exp, 0)) |
4545 | || target_for_debug_bind (TREE_OPERAND (exp, 0)))) | |
c8a27c40 JJ |
4546 | return gen_rtx_DEBUG_IMPLICIT_PTR (mode, TREE_OPERAND (exp, 0)); |
4547 | ||
4548 | if (handled_component_p (TREE_OPERAND (exp, 0))) | |
4549 | { | |
4550 | HOST_WIDE_INT bitoffset, bitsize, maxsize; | |
4551 | tree decl | |
4552 | = get_ref_base_and_extent (TREE_OPERAND (exp, 0), | |
4553 | &bitoffset, &bitsize, &maxsize); | |
4554 | if ((TREE_CODE (decl) == VAR_DECL | |
4555 | || TREE_CODE (decl) == PARM_DECL | |
4556 | || TREE_CODE (decl) == RESULT_DECL) | |
f8cca67b JJ |
4557 | && (!TREE_ADDRESSABLE (decl) |
4558 | || target_for_debug_bind (decl)) | |
c8a27c40 JJ |
4559 | && (bitoffset % BITS_PER_UNIT) == 0 |
4560 | && bitsize > 0 | |
4561 | && bitsize == maxsize) | |
0a81f074 RS |
4562 | { |
4563 | rtx base = gen_rtx_DEBUG_IMPLICIT_PTR (mode, decl); | |
4564 | return plus_constant (mode, base, bitoffset / BITS_PER_UNIT); | |
4565 | } | |
c8a27c40 JJ |
4566 | } |
4567 | ||
9430b7ba JJ |
4568 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == MEM_REF |
4569 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)) | |
4570 | == ADDR_EXPR) | |
4571 | { | |
4572 | op0 = expand_debug_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), | |
4573 | 0)); | |
4574 | if (op0 != NULL | |
4575 | && (GET_CODE (op0) == DEBUG_IMPLICIT_PTR | |
4576 | || (GET_CODE (op0) == PLUS | |
4577 | && GET_CODE (XEXP (op0, 0)) == DEBUG_IMPLICIT_PTR | |
4578 | && CONST_INT_P (XEXP (op0, 1))))) | |
4579 | { | |
4580 | op1 = expand_debug_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), | |
4581 | 1)); | |
4582 | if (!op1 || !CONST_INT_P (op1)) | |
4583 | return NULL; | |
4584 | ||
4585 | return plus_constant (mode, op0, INTVAL (op1)); | |
4586 | } | |
4587 | } | |
4588 | ||
c8a27c40 JJ |
4589 | return NULL; |
4590 | } | |
b5b8b0ac | 4591 | |
a148c4b2 | 4592 | as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp))); |
f61c6f34 | 4593 | op0 = convert_debug_memory_address (mode, XEXP (op0, 0), as); |
dda2da58 AO |
4594 | |
4595 | return op0; | |
b5b8b0ac AO |
4596 | |
4597 | case VECTOR_CST: | |
d2a12ae7 RG |
4598 | { |
4599 | unsigned i; | |
4600 | ||
4601 | op0 = gen_rtx_CONCATN | |
4602 | (mode, rtvec_alloc (TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)))); | |
4603 | ||
4604 | for (i = 0; i < VECTOR_CST_NELTS (exp); ++i) | |
4605 | { | |
4606 | op1 = expand_debug_expr (VECTOR_CST_ELT (exp, i)); | |
4607 | if (!op1) | |
4608 | return NULL; | |
4609 | XVECEXP (op0, 0, i) = op1; | |
4610 | } | |
4611 | ||
4612 | return op0; | |
4613 | } | |
b5b8b0ac AO |
4614 | |
4615 | case CONSTRUCTOR: | |
47598145 MM |
4616 | if (TREE_CLOBBER_P (exp)) |
4617 | return NULL; | |
4618 | else if (TREE_CODE (TREE_TYPE (exp)) == VECTOR_TYPE) | |
b5b8b0ac AO |
4619 | { |
4620 | unsigned i; | |
4621 | tree val; | |
4622 | ||
4623 | op0 = gen_rtx_CONCATN | |
4624 | (mode, rtvec_alloc (TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)))); | |
4625 | ||
4626 | FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), i, val) | |
4627 | { | |
4628 | op1 = expand_debug_expr (val); | |
4629 | if (!op1) | |
4630 | return NULL; | |
4631 | XVECEXP (op0, 0, i) = op1; | |
4632 | } | |
4633 | ||
4634 | if (i < TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp))) | |
4635 | { | |
4636 | op1 = expand_debug_expr | |
e8160c9a | 4637 | (build_zero_cst (TREE_TYPE (TREE_TYPE (exp)))); |
b5b8b0ac AO |
4638 | |
4639 | if (!op1) | |
4640 | return NULL; | |
4641 | ||
4642 | for (; i < TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)); i++) | |
4643 | XVECEXP (op0, 0, i) = op1; | |
4644 | } | |
4645 | ||
4646 | return op0; | |
4647 | } | |
4648 | else | |
4649 | goto flag_unsupported; | |
4650 | ||
4651 | case CALL_EXPR: | |
4652 | /* ??? Maybe handle some builtins? */ | |
4653 | return NULL; | |
4654 | ||
4655 | case SSA_NAME: | |
4656 | { | |
2a8e30fb MM |
4657 | gimple g = get_gimple_for_ssa_name (exp); |
4658 | if (g) | |
4659 | { | |
dfde35b3 JJ |
4660 | tree t = NULL_TREE; |
4661 | if (deep_ter_debug_map) | |
4662 | { | |
4663 | tree *slot = deep_ter_debug_map->get (exp); | |
4664 | if (slot) | |
4665 | t = *slot; | |
4666 | } | |
4667 | if (t == NULL_TREE) | |
4668 | t = gimple_assign_rhs_to_tree (g); | |
4669 | op0 = expand_debug_expr (t); | |
2a8e30fb MM |
4670 | if (!op0) |
4671 | return NULL; | |
4672 | } | |
4673 | else | |
4674 | { | |
4675 | int part = var_to_partition (SA.map, exp); | |
b5b8b0ac | 4676 | |
2a8e30fb | 4677 | if (part == NO_PARTITION) |
a58a8e4b JJ |
4678 | { |
4679 | /* If this is a reference to an incoming value of parameter | |
4680 | that is never used in the code or where the incoming | |
4681 | value is never used in the code, use PARM_DECL's | |
4682 | DECL_RTL if set. */ | |
4683 | if (SSA_NAME_IS_DEFAULT_DEF (exp) | |
4684 | && TREE_CODE (SSA_NAME_VAR (exp)) == PARM_DECL) | |
4685 | { | |
12c5ffe5 EB |
4686 | op0 = expand_debug_parm_decl (SSA_NAME_VAR (exp)); |
4687 | if (op0) | |
4688 | goto adjust_mode; | |
a58a8e4b | 4689 | op0 = expand_debug_expr (SSA_NAME_VAR (exp)); |
12c5ffe5 EB |
4690 | if (op0) |
4691 | goto adjust_mode; | |
a58a8e4b JJ |
4692 | } |
4693 | return NULL; | |
4694 | } | |
b5b8b0ac | 4695 | |
2a8e30fb | 4696 | gcc_assert (part >= 0 && (unsigned)part < SA.map->num_partitions); |
b5b8b0ac | 4697 | |
abfea58d | 4698 | op0 = copy_rtx (SA.partition_to_pseudo[part]); |
2a8e30fb | 4699 | } |
b5b8b0ac AO |
4700 | goto adjust_mode; |
4701 | } | |
4702 | ||
4703 | case ERROR_MARK: | |
4704 | return NULL; | |
4705 | ||
7ece48b1 JJ |
4706 | /* Vector stuff. For most of the codes we don't have rtl codes. */ |
4707 | case REALIGN_LOAD_EXPR: | |
4708 | case REDUC_MAX_EXPR: | |
4709 | case REDUC_MIN_EXPR: | |
4710 | case REDUC_PLUS_EXPR: | |
4711 | case VEC_COND_EXPR: | |
7ece48b1 JJ |
4712 | case VEC_PACK_FIX_TRUNC_EXPR: |
4713 | case VEC_PACK_SAT_EXPR: | |
4714 | case VEC_PACK_TRUNC_EXPR: | |
7ece48b1 JJ |
4715 | case VEC_UNPACK_FLOAT_HI_EXPR: |
4716 | case VEC_UNPACK_FLOAT_LO_EXPR: | |
4717 | case VEC_UNPACK_HI_EXPR: | |
4718 | case VEC_UNPACK_LO_EXPR: | |
4719 | case VEC_WIDEN_MULT_HI_EXPR: | |
4720 | case VEC_WIDEN_MULT_LO_EXPR: | |
3f30a9a6 RH |
4721 | case VEC_WIDEN_MULT_EVEN_EXPR: |
4722 | case VEC_WIDEN_MULT_ODD_EXPR: | |
36ba4aae IR |
4723 | case VEC_WIDEN_LSHIFT_HI_EXPR: |
4724 | case VEC_WIDEN_LSHIFT_LO_EXPR: | |
3f3af9df | 4725 | case VEC_PERM_EXPR: |
7ece48b1 JJ |
4726 | return NULL; |
4727 | ||
98449720 | 4728 | /* Misc codes. */ |
7ece48b1 JJ |
4729 | case ADDR_SPACE_CONVERT_EXPR: |
4730 | case FIXED_CONVERT_EXPR: | |
4731 | case OBJ_TYPE_REF: | |
4732 | case WITH_SIZE_EXPR: | |
4733 | return NULL; | |
4734 | ||
4735 | case DOT_PROD_EXPR: | |
4736 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) | |
4737 | && SCALAR_INT_MODE_P (mode)) | |
4738 | { | |
2ba172e0 JJ |
4739 | op0 |
4740 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
4741 | 0))) | |
4742 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op0, | |
4743 | inner_mode); | |
4744 | op1 | |
4745 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
4746 | 1))) | |
4747 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op1, | |
4748 | inner_mode); | |
4749 | op0 = simplify_gen_binary (MULT, mode, op0, op1); | |
4750 | return simplify_gen_binary (PLUS, mode, op0, op2); | |
7ece48b1 JJ |
4751 | } |
4752 | return NULL; | |
4753 | ||
4754 | case WIDEN_MULT_EXPR: | |
0354c0c7 BS |
4755 | case WIDEN_MULT_PLUS_EXPR: |
4756 | case WIDEN_MULT_MINUS_EXPR: | |
7ece48b1 JJ |
4757 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) |
4758 | && SCALAR_INT_MODE_P (mode)) | |
4759 | { | |
2ba172e0 | 4760 | inner_mode = GET_MODE (op0); |
7ece48b1 | 4761 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
5b58b39b | 4762 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); |
7ece48b1 | 4763 | else |
5b58b39b | 4764 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); |
7ece48b1 | 4765 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 1)))) |
5b58b39b | 4766 | op1 = simplify_gen_unary (ZERO_EXTEND, mode, op1, inner_mode); |
7ece48b1 | 4767 | else |
5b58b39b | 4768 | op1 = simplify_gen_unary (SIGN_EXTEND, mode, op1, inner_mode); |
2ba172e0 | 4769 | op0 = simplify_gen_binary (MULT, mode, op0, op1); |
0354c0c7 BS |
4770 | if (TREE_CODE (exp) == WIDEN_MULT_EXPR) |
4771 | return op0; | |
4772 | else if (TREE_CODE (exp) == WIDEN_MULT_PLUS_EXPR) | |
2ba172e0 | 4773 | return simplify_gen_binary (PLUS, mode, op0, op2); |
0354c0c7 | 4774 | else |
2ba172e0 | 4775 | return simplify_gen_binary (MINUS, mode, op2, op0); |
7ece48b1 JJ |
4776 | } |
4777 | return NULL; | |
4778 | ||
98449720 RH |
4779 | case MULT_HIGHPART_EXPR: |
4780 | /* ??? Similar to the above. */ | |
4781 | return NULL; | |
4782 | ||
7ece48b1 | 4783 | case WIDEN_SUM_EXPR: |
3f3af9df | 4784 | case WIDEN_LSHIFT_EXPR: |
7ece48b1 JJ |
4785 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) |
4786 | && SCALAR_INT_MODE_P (mode)) | |
4787 | { | |
2ba172e0 JJ |
4788 | op0 |
4789 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
4790 | 0))) | |
4791 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op0, | |
4792 | inner_mode); | |
3f3af9df JJ |
4793 | return simplify_gen_binary (TREE_CODE (exp) == WIDEN_LSHIFT_EXPR |
4794 | ? ASHIFT : PLUS, mode, op0, op1); | |
7ece48b1 JJ |
4795 | } |
4796 | return NULL; | |
4797 | ||
0f59b812 | 4798 | case FMA_EXPR: |
2ba172e0 | 4799 | return simplify_gen_ternary (FMA, mode, inner_mode, op0, op1, op2); |
0f59b812 | 4800 | |
b5b8b0ac AO |
4801 | default: |
4802 | flag_unsupported: | |
4803 | #ifdef ENABLE_CHECKING | |
4804 | debug_tree (exp); | |
4805 | gcc_unreachable (); | |
4806 | #else | |
4807 | return NULL; | |
4808 | #endif | |
4809 | } | |
4810 | } | |
4811 | ||
ddb555ed JJ |
4812 | /* Return an RTX equivalent to the source bind value of the tree expression |
4813 | EXP. */ | |
4814 | ||
4815 | static rtx | |
4816 | expand_debug_source_expr (tree exp) | |
4817 | { | |
4818 | rtx op0 = NULL_RTX; | |
ef4bddc2 | 4819 | machine_mode mode = VOIDmode, inner_mode; |
ddb555ed JJ |
4820 | |
4821 | switch (TREE_CODE (exp)) | |
4822 | { | |
4823 | case PARM_DECL: | |
4824 | { | |
ddb555ed | 4825 | mode = DECL_MODE (exp); |
12c5ffe5 EB |
4826 | op0 = expand_debug_parm_decl (exp); |
4827 | if (op0) | |
4828 | break; | |
ddb555ed JJ |
4829 | /* See if this isn't an argument that has been completely |
4830 | optimized out. */ | |
4831 | if (!DECL_RTL_SET_P (exp) | |
12c5ffe5 | 4832 | && !DECL_INCOMING_RTL (exp) |
ddb555ed JJ |
4833 | && DECL_ABSTRACT_ORIGIN (current_function_decl)) |
4834 | { | |
7b575cfa | 4835 | tree aexp = DECL_ORIGIN (exp); |
ddb555ed JJ |
4836 | if (DECL_CONTEXT (aexp) |
4837 | == DECL_ABSTRACT_ORIGIN (current_function_decl)) | |
4838 | { | |
9771b263 | 4839 | vec<tree, va_gc> **debug_args; |
ddb555ed JJ |
4840 | unsigned int ix; |
4841 | tree ddecl; | |
ddb555ed JJ |
4842 | debug_args = decl_debug_args_lookup (current_function_decl); |
4843 | if (debug_args != NULL) | |
4844 | { | |
9771b263 | 4845 | for (ix = 0; vec_safe_iterate (*debug_args, ix, &ddecl); |
ddb555ed JJ |
4846 | ix += 2) |
4847 | if (ddecl == aexp) | |
4848 | return gen_rtx_DEBUG_PARAMETER_REF (mode, aexp); | |
4849 | } | |
4850 | } | |
4851 | } | |
4852 | break; | |
4853 | } | |
4854 | default: | |
4855 | break; | |
4856 | } | |
4857 | ||
4858 | if (op0 == NULL_RTX) | |
4859 | return NULL_RTX; | |
4860 | ||
4861 | inner_mode = GET_MODE (op0); | |
4862 | if (mode == inner_mode) | |
4863 | return op0; | |
4864 | ||
4865 | if (FLOAT_MODE_P (mode) && FLOAT_MODE_P (inner_mode)) | |
4866 | { | |
4867 | if (GET_MODE_BITSIZE (mode) == GET_MODE_BITSIZE (inner_mode)) | |
4868 | op0 = simplify_gen_subreg (mode, op0, inner_mode, 0); | |
4869 | else if (GET_MODE_BITSIZE (mode) < GET_MODE_BITSIZE (inner_mode)) | |
4870 | op0 = simplify_gen_unary (FLOAT_TRUNCATE, mode, op0, inner_mode); | |
4871 | else | |
4872 | op0 = simplify_gen_unary (FLOAT_EXTEND, mode, op0, inner_mode); | |
4873 | } | |
4874 | else if (FLOAT_MODE_P (mode)) | |
4875 | gcc_unreachable (); | |
4876 | else if (FLOAT_MODE_P (inner_mode)) | |
4877 | { | |
4878 | if (TYPE_UNSIGNED (TREE_TYPE (exp))) | |
4879 | op0 = simplify_gen_unary (UNSIGNED_FIX, mode, op0, inner_mode); | |
4880 | else | |
4881 | op0 = simplify_gen_unary (FIX, mode, op0, inner_mode); | |
4882 | } | |
4883 | else if (CONSTANT_P (op0) | |
4884 | || GET_MODE_BITSIZE (mode) <= GET_MODE_BITSIZE (inner_mode)) | |
4885 | op0 = simplify_gen_subreg (mode, op0, inner_mode, | |
4886 | subreg_lowpart_offset (mode, inner_mode)); | |
4887 | else if (TYPE_UNSIGNED (TREE_TYPE (exp))) | |
4888 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); | |
4889 | else | |
4890 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); | |
4891 | ||
4892 | return op0; | |
4893 | } | |
4894 | ||
6cfa417f JJ |
4895 | /* Ensure INSN_VAR_LOCATION_LOC (insn) doesn't have unbound complexity. |
4896 | Allow 4 levels of rtl nesting for most rtl codes, and if we see anything | |
4897 | deeper than that, create DEBUG_EXPRs and emit DEBUG_INSNs before INSN. */ | |
4898 | ||
4899 | static void | |
b47aae36 | 4900 | avoid_complex_debug_insns (rtx_insn *insn, rtx *exp_p, int depth) |
6cfa417f JJ |
4901 | { |
4902 | rtx exp = *exp_p; | |
4903 | ||
4904 | if (exp == NULL_RTX) | |
4905 | return; | |
4906 | ||
4907 | if ((OBJECT_P (exp) && !MEM_P (exp)) || GET_CODE (exp) == CLOBBER) | |
4908 | return; | |
4909 | ||
4910 | if (depth == 4) | |
4911 | { | |
4912 | /* Create DEBUG_EXPR (and DEBUG_EXPR_DECL). */ | |
4913 | rtx dval = make_debug_expr_from_rtl (exp); | |
4914 | ||
4915 | /* Emit a debug bind insn before INSN. */ | |
4916 | rtx bind = gen_rtx_VAR_LOCATION (GET_MODE (exp), | |
4917 | DEBUG_EXPR_TREE_DECL (dval), exp, | |
4918 | VAR_INIT_STATUS_INITIALIZED); | |
4919 | ||
4920 | emit_debug_insn_before (bind, insn); | |
4921 | *exp_p = dval; | |
4922 | return; | |
4923 | } | |
4924 | ||
4925 | const char *format_ptr = GET_RTX_FORMAT (GET_CODE (exp)); | |
4926 | int i, j; | |
4927 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (exp)); i++) | |
4928 | switch (*format_ptr++) | |
4929 | { | |
4930 | case 'e': | |
4931 | avoid_complex_debug_insns (insn, &XEXP (exp, i), depth + 1); | |
4932 | break; | |
4933 | ||
4934 | case 'E': | |
4935 | case 'V': | |
4936 | for (j = 0; j < XVECLEN (exp, i); j++) | |
4937 | avoid_complex_debug_insns (insn, &XVECEXP (exp, i, j), depth + 1); | |
4938 | break; | |
4939 | ||
4940 | default: | |
4941 | break; | |
4942 | } | |
4943 | } | |
4944 | ||
b5b8b0ac AO |
4945 | /* Expand the _LOCs in debug insns. We run this after expanding all |
4946 | regular insns, so that any variables referenced in the function | |
4947 | will have their DECL_RTLs set. */ | |
4948 | ||
4949 | static void | |
4950 | expand_debug_locations (void) | |
4951 | { | |
b47aae36 DM |
4952 | rtx_insn *insn; |
4953 | rtx_insn *last = get_last_insn (); | |
b5b8b0ac AO |
4954 | int save_strict_alias = flag_strict_aliasing; |
4955 | ||
4956 | /* New alias sets while setting up memory attributes cause | |
4957 | -fcompare-debug failures, even though it doesn't bring about any | |
4958 | codegen changes. */ | |
4959 | flag_strict_aliasing = 0; | |
4960 | ||
4961 | for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) | |
4962 | if (DEBUG_INSN_P (insn)) | |
4963 | { | |
4964 | tree value = (tree)INSN_VAR_LOCATION_LOC (insn); | |
b47aae36 DM |
4965 | rtx val; |
4966 | rtx_insn *prev_insn, *insn2; | |
ef4bddc2 | 4967 | machine_mode mode; |
b5b8b0ac AO |
4968 | |
4969 | if (value == NULL_TREE) | |
4970 | val = NULL_RTX; | |
4971 | else | |
4972 | { | |
ddb555ed JJ |
4973 | if (INSN_VAR_LOCATION_STATUS (insn) |
4974 | == VAR_INIT_STATUS_UNINITIALIZED) | |
4975 | val = expand_debug_source_expr (value); | |
dfde35b3 JJ |
4976 | /* The avoid_deep_ter_for_debug function inserts |
4977 | debug bind stmts after SSA_NAME definition, with the | |
4978 | SSA_NAME as the whole bind location. Disable temporarily | |
4979 | expansion of that SSA_NAME into the DEBUG_EXPR_DECL | |
4980 | being defined in this DEBUG_INSN. */ | |
4981 | else if (deep_ter_debug_map && TREE_CODE (value) == SSA_NAME) | |
4982 | { | |
4983 | tree *slot = deep_ter_debug_map->get (value); | |
4984 | if (slot) | |
4985 | { | |
4986 | if (*slot == INSN_VAR_LOCATION_DECL (insn)) | |
4987 | *slot = NULL_TREE; | |
4988 | else | |
4989 | slot = NULL; | |
4990 | } | |
4991 | val = expand_debug_expr (value); | |
4992 | if (slot) | |
4993 | *slot = INSN_VAR_LOCATION_DECL (insn); | |
4994 | } | |
ddb555ed JJ |
4995 | else |
4996 | val = expand_debug_expr (value); | |
b5b8b0ac AO |
4997 | gcc_assert (last == get_last_insn ()); |
4998 | } | |
4999 | ||
5000 | if (!val) | |
5001 | val = gen_rtx_UNKNOWN_VAR_LOC (); | |
5002 | else | |
5003 | { | |
5004 | mode = GET_MODE (INSN_VAR_LOCATION (insn)); | |
5005 | ||
5006 | gcc_assert (mode == GET_MODE (val) | |
5007 | || (GET_MODE (val) == VOIDmode | |
33ffb5c5 | 5008 | && (CONST_SCALAR_INT_P (val) |
b5b8b0ac | 5009 | || GET_CODE (val) == CONST_FIXED |
b5b8b0ac AO |
5010 | || GET_CODE (val) == LABEL_REF))); |
5011 | } | |
5012 | ||
5013 | INSN_VAR_LOCATION_LOC (insn) = val; | |
6cfa417f JJ |
5014 | prev_insn = PREV_INSN (insn); |
5015 | for (insn2 = insn; insn2 != prev_insn; insn2 = PREV_INSN (insn2)) | |
5016 | avoid_complex_debug_insns (insn2, &INSN_VAR_LOCATION_LOC (insn2), 0); | |
b5b8b0ac AO |
5017 | } |
5018 | ||
5019 | flag_strict_aliasing = save_strict_alias; | |
5020 | } | |
5021 | ||
d2626c0b YR |
5022 | /* Performs swapping operands of commutative operations to expand |
5023 | the expensive one first. */ | |
5024 | ||
5025 | static void | |
5026 | reorder_operands (basic_block bb) | |
5027 | { | |
5028 | unsigned int *lattice; /* Hold cost of each statement. */ | |
5029 | unsigned int i = 0, n = 0; | |
5030 | gimple_stmt_iterator gsi; | |
5031 | gimple_seq stmts; | |
5032 | gimple stmt; | |
5033 | bool swap; | |
5034 | tree op0, op1; | |
5035 | ssa_op_iter iter; | |
5036 | use_operand_p use_p; | |
5037 | gimple def0, def1; | |
5038 | ||
5039 | /* Compute cost of each statement using estimate_num_insns. */ | |
5040 | stmts = bb_seq (bb); | |
5041 | for (gsi = gsi_start (stmts); !gsi_end_p (gsi); gsi_next (&gsi)) | |
5042 | { | |
5043 | stmt = gsi_stmt (gsi); | |
090238ee YR |
5044 | if (!is_gimple_debug (stmt)) |
5045 | gimple_set_uid (stmt, n++); | |
d2626c0b YR |
5046 | } |
5047 | lattice = XNEWVEC (unsigned int, n); | |
5048 | for (gsi = gsi_start (stmts); !gsi_end_p (gsi); gsi_next (&gsi)) | |
5049 | { | |
5050 | unsigned cost; | |
5051 | stmt = gsi_stmt (gsi); | |
090238ee YR |
5052 | if (is_gimple_debug (stmt)) |
5053 | continue; | |
d2626c0b YR |
5054 | cost = estimate_num_insns (stmt, &eni_size_weights); |
5055 | lattice[i] = cost; | |
5056 | FOR_EACH_SSA_USE_OPERAND (use_p, stmt, iter, SSA_OP_USE) | |
5057 | { | |
5058 | tree use = USE_FROM_PTR (use_p); | |
5059 | gimple def_stmt; | |
5060 | if (TREE_CODE (use) != SSA_NAME) | |
5061 | continue; | |
5062 | def_stmt = get_gimple_for_ssa_name (use); | |
5063 | if (!def_stmt) | |
5064 | continue; | |
5065 | lattice[i] += lattice[gimple_uid (def_stmt)]; | |
5066 | } | |
5067 | i++; | |
5068 | if (!is_gimple_assign (stmt) | |
5069 | || !commutative_tree_code (gimple_assign_rhs_code (stmt))) | |
5070 | continue; | |
5071 | op0 = gimple_op (stmt, 1); | |
5072 | op1 = gimple_op (stmt, 2); | |
5073 | if (TREE_CODE (op0) != SSA_NAME | |
5074 | || TREE_CODE (op1) != SSA_NAME) | |
5075 | continue; | |
5076 | /* Swap operands if the second one is more expensive. */ | |
5077 | def0 = get_gimple_for_ssa_name (op0); | |
d2626c0b YR |
5078 | def1 = get_gimple_for_ssa_name (op1); |
5079 | if (!def1) | |
5080 | continue; | |
5081 | swap = false; | |
68ca4ac9 | 5082 | if (!def0 || lattice[gimple_uid (def1)] > lattice[gimple_uid (def0)]) |
d2626c0b YR |
5083 | swap = true; |
5084 | if (swap) | |
5085 | { | |
5086 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5087 | { | |
5088 | fprintf (dump_file, "Swap operands in stmt:\n"); | |
5089 | print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM); | |
5090 | fprintf (dump_file, "Cost left opnd=%d, right opnd=%d\n", | |
68ca4ac9 | 5091 | def0 ? lattice[gimple_uid (def0)] : 0, |
d2626c0b YR |
5092 | lattice[gimple_uid (def1)]); |
5093 | } | |
5094 | swap_ssa_operands (stmt, gimple_assign_rhs1_ptr (stmt), | |
5095 | gimple_assign_rhs2_ptr (stmt)); | |
5096 | } | |
5097 | } | |
5098 | XDELETE (lattice); | |
5099 | } | |
5100 | ||
242229bb JH |
5101 | /* Expand basic block BB from GIMPLE trees to RTL. */ |
5102 | ||
5103 | static basic_block | |
f3ddd692 | 5104 | expand_gimple_basic_block (basic_block bb, bool disable_tail_calls) |
242229bb | 5105 | { |
726a989a RB |
5106 | gimple_stmt_iterator gsi; |
5107 | gimple_seq stmts; | |
5108 | gimple stmt = NULL; | |
66e8df53 | 5109 | rtx_note *note; |
b47aae36 | 5110 | rtx_insn *last; |
242229bb | 5111 | edge e; |
628f6a4e | 5112 | edge_iterator ei; |
242229bb JH |
5113 | |
5114 | if (dump_file) | |
726a989a RB |
5115 | fprintf (dump_file, "\n;; Generating RTL for gimple basic block %d\n", |
5116 | bb->index); | |
5117 | ||
5118 | /* Note that since we are now transitioning from GIMPLE to RTL, we | |
5119 | cannot use the gsi_*_bb() routines because they expect the basic | |
5120 | block to be in GIMPLE, instead of RTL. Therefore, we need to | |
5121 | access the BB sequence directly. */ | |
d2626c0b YR |
5122 | if (optimize) |
5123 | reorder_operands (bb); | |
726a989a | 5124 | stmts = bb_seq (bb); |
3e8b732e MM |
5125 | bb->il.gimple.seq = NULL; |
5126 | bb->il.gimple.phi_nodes = NULL; | |
bf08ebeb | 5127 | rtl_profile_for_bb (bb); |
5e2d947c JH |
5128 | init_rtl_bb_info (bb); |
5129 | bb->flags |= BB_RTL; | |
5130 | ||
a9b77cd1 ZD |
5131 | /* Remove the RETURN_EXPR if we may fall though to the exit |
5132 | instead. */ | |
726a989a RB |
5133 | gsi = gsi_last (stmts); |
5134 | if (!gsi_end_p (gsi) | |
5135 | && gimple_code (gsi_stmt (gsi)) == GIMPLE_RETURN) | |
a9b77cd1 | 5136 | { |
538dd0b7 | 5137 | greturn *ret_stmt = as_a <greturn *> (gsi_stmt (gsi)); |
a9b77cd1 ZD |
5138 | |
5139 | gcc_assert (single_succ_p (bb)); | |
fefa31b5 | 5140 | gcc_assert (single_succ (bb) == EXIT_BLOCK_PTR_FOR_FN (cfun)); |
a9b77cd1 | 5141 | |
fefa31b5 | 5142 | if (bb->next_bb == EXIT_BLOCK_PTR_FOR_FN (cfun) |
726a989a | 5143 | && !gimple_return_retval (ret_stmt)) |
a9b77cd1 | 5144 | { |
726a989a | 5145 | gsi_remove (&gsi, false); |
a9b77cd1 ZD |
5146 | single_succ_edge (bb)->flags |= EDGE_FALLTHRU; |
5147 | } | |
5148 | } | |
5149 | ||
726a989a RB |
5150 | gsi = gsi_start (stmts); |
5151 | if (!gsi_end_p (gsi)) | |
8b11009b | 5152 | { |
726a989a RB |
5153 | stmt = gsi_stmt (gsi); |
5154 | if (gimple_code (stmt) != GIMPLE_LABEL) | |
5155 | stmt = NULL; | |
8b11009b | 5156 | } |
242229bb | 5157 | |
134aa83c | 5158 | rtx_code_label **elt = lab_rtx_for_bb->get (bb); |
8b11009b ZD |
5159 | |
5160 | if (stmt || elt) | |
242229bb JH |
5161 | { |
5162 | last = get_last_insn (); | |
5163 | ||
8b11009b ZD |
5164 | if (stmt) |
5165 | { | |
28ed065e | 5166 | expand_gimple_stmt (stmt); |
726a989a | 5167 | gsi_next (&gsi); |
8b11009b ZD |
5168 | } |
5169 | ||
5170 | if (elt) | |
39c8aaa4 | 5171 | emit_label (*elt); |
242229bb | 5172 | |
caf93cb0 | 5173 | /* Java emits line number notes in the top of labels. |
c22cacf3 | 5174 | ??? Make this go away once line number notes are obsoleted. */ |
1130d5e3 | 5175 | BB_HEAD (bb) = NEXT_INSN (last); |
4b4bf941 | 5176 | if (NOTE_P (BB_HEAD (bb))) |
1130d5e3 | 5177 | BB_HEAD (bb) = NEXT_INSN (BB_HEAD (bb)); |
242229bb | 5178 | note = emit_note_after (NOTE_INSN_BASIC_BLOCK, BB_HEAD (bb)); |
b7211528 | 5179 | |
726a989a | 5180 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
242229bb JH |
5181 | } |
5182 | else | |
1130d5e3 | 5183 | BB_HEAD (bb) = note = emit_note (NOTE_INSN_BASIC_BLOCK); |
242229bb JH |
5184 | |
5185 | NOTE_BASIC_BLOCK (note) = bb; | |
5186 | ||
726a989a | 5187 | for (; !gsi_end_p (gsi); gsi_next (&gsi)) |
242229bb | 5188 | { |
cea49550 | 5189 | basic_block new_bb; |
242229bb | 5190 | |
b5b8b0ac | 5191 | stmt = gsi_stmt (gsi); |
2a8e30fb MM |
5192 | |
5193 | /* If this statement is a non-debug one, and we generate debug | |
5194 | insns, then this one might be the last real use of a TERed | |
5195 | SSA_NAME, but where there are still some debug uses further | |
5196 | down. Expanding the current SSA name in such further debug | |
5197 | uses by their RHS might lead to wrong debug info, as coalescing | |
5198 | might make the operands of such RHS be placed into the same | |
5199 | pseudo as something else. Like so: | |
5200 | a_1 = a_0 + 1; // Assume a_1 is TERed and a_0 is dead | |
5201 | use(a_1); | |
5202 | a_2 = ... | |
5203 | #DEBUG ... => a_1 | |
5204 | As a_0 and a_2 don't overlap in lifetime, assume they are coalesced. | |
5205 | If we now would expand a_1 by it's RHS (a_0 + 1) in the debug use, | |
5206 | the write to a_2 would actually have clobbered the place which | |
5207 | formerly held a_0. | |
5208 | ||
5209 | So, instead of that, we recognize the situation, and generate | |
5210 | debug temporaries at the last real use of TERed SSA names: | |
5211 | a_1 = a_0 + 1; | |
5212 | #DEBUG #D1 => a_1 | |
5213 | use(a_1); | |
5214 | a_2 = ... | |
5215 | #DEBUG ... => #D1 | |
5216 | */ | |
5217 | if (MAY_HAVE_DEBUG_INSNS | |
5218 | && SA.values | |
5219 | && !is_gimple_debug (stmt)) | |
5220 | { | |
5221 | ssa_op_iter iter; | |
5222 | tree op; | |
5223 | gimple def; | |
5224 | ||
5368224f | 5225 | location_t sloc = curr_insn_location (); |
2a8e30fb MM |
5226 | |
5227 | /* Look for SSA names that have their last use here (TERed | |
5228 | names always have only one real use). */ | |
5229 | FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_USE) | |
5230 | if ((def = get_gimple_for_ssa_name (op))) | |
5231 | { | |
5232 | imm_use_iterator imm_iter; | |
5233 | use_operand_p use_p; | |
5234 | bool have_debug_uses = false; | |
5235 | ||
5236 | FOR_EACH_IMM_USE_FAST (use_p, imm_iter, op) | |
5237 | { | |
5238 | if (gimple_debug_bind_p (USE_STMT (use_p))) | |
5239 | { | |
5240 | have_debug_uses = true; | |
5241 | break; | |
5242 | } | |
5243 | } | |
5244 | ||
5245 | if (have_debug_uses) | |
5246 | { | |
871dae34 | 5247 | /* OP is a TERed SSA name, with DEF its defining |
2a8e30fb MM |
5248 | statement, and where OP is used in further debug |
5249 | instructions. Generate a debug temporary, and | |
5250 | replace all uses of OP in debug insns with that | |
5251 | temporary. */ | |
5252 | gimple debugstmt; | |
5253 | tree value = gimple_assign_rhs_to_tree (def); | |
5254 | tree vexpr = make_node (DEBUG_EXPR_DECL); | |
5255 | rtx val; | |
ef4bddc2 | 5256 | machine_mode mode; |
2a8e30fb | 5257 | |
5368224f | 5258 | set_curr_insn_location (gimple_location (def)); |
2a8e30fb MM |
5259 | |
5260 | DECL_ARTIFICIAL (vexpr) = 1; | |
5261 | TREE_TYPE (vexpr) = TREE_TYPE (value); | |
5262 | if (DECL_P (value)) | |
5263 | mode = DECL_MODE (value); | |
5264 | else | |
5265 | mode = TYPE_MODE (TREE_TYPE (value)); | |
5266 | DECL_MODE (vexpr) = mode; | |
5267 | ||
5268 | val = gen_rtx_VAR_LOCATION | |
5269 | (mode, vexpr, (rtx)value, VAR_INIT_STATUS_INITIALIZED); | |
5270 | ||
e8c6bb74 | 5271 | emit_debug_insn (val); |
2a8e30fb MM |
5272 | |
5273 | FOR_EACH_IMM_USE_STMT (debugstmt, imm_iter, op) | |
5274 | { | |
5275 | if (!gimple_debug_bind_p (debugstmt)) | |
5276 | continue; | |
5277 | ||
5278 | FOR_EACH_IMM_USE_ON_STMT (use_p, imm_iter) | |
5279 | SET_USE (use_p, vexpr); | |
5280 | ||
5281 | update_stmt (debugstmt); | |
5282 | } | |
5283 | } | |
5284 | } | |
5368224f | 5285 | set_curr_insn_location (sloc); |
2a8e30fb MM |
5286 | } |
5287 | ||
a5883ba0 | 5288 | currently_expanding_gimple_stmt = stmt; |
b5b8b0ac | 5289 | |
242229bb JH |
5290 | /* Expand this statement, then evaluate the resulting RTL and |
5291 | fixup the CFG accordingly. */ | |
726a989a | 5292 | if (gimple_code (stmt) == GIMPLE_COND) |
cea49550 | 5293 | { |
538dd0b7 | 5294 | new_bb = expand_gimple_cond (bb, as_a <gcond *> (stmt)); |
cea49550 RH |
5295 | if (new_bb) |
5296 | return new_bb; | |
5297 | } | |
b5b8b0ac AO |
5298 | else if (gimple_debug_bind_p (stmt)) |
5299 | { | |
5368224f | 5300 | location_t sloc = curr_insn_location (); |
b5b8b0ac AO |
5301 | gimple_stmt_iterator nsi = gsi; |
5302 | ||
5303 | for (;;) | |
5304 | { | |
5305 | tree var = gimple_debug_bind_get_var (stmt); | |
5306 | tree value; | |
5307 | rtx val; | |
ef4bddc2 | 5308 | machine_mode mode; |
b5b8b0ac | 5309 | |
ec8c1492 JJ |
5310 | if (TREE_CODE (var) != DEBUG_EXPR_DECL |
5311 | && TREE_CODE (var) != LABEL_DECL | |
5312 | && !target_for_debug_bind (var)) | |
5313 | goto delink_debug_stmt; | |
5314 | ||
b5b8b0ac AO |
5315 | if (gimple_debug_bind_has_value_p (stmt)) |
5316 | value = gimple_debug_bind_get_value (stmt); | |
5317 | else | |
5318 | value = NULL_TREE; | |
5319 | ||
5320 | last = get_last_insn (); | |
5321 | ||
5368224f | 5322 | set_curr_insn_location (gimple_location (stmt)); |
b5b8b0ac AO |
5323 | |
5324 | if (DECL_P (var)) | |
5325 | mode = DECL_MODE (var); | |
5326 | else | |
5327 | mode = TYPE_MODE (TREE_TYPE (var)); | |
5328 | ||
5329 | val = gen_rtx_VAR_LOCATION | |
5330 | (mode, var, (rtx)value, VAR_INIT_STATUS_INITIALIZED); | |
5331 | ||
e16b6fd0 | 5332 | emit_debug_insn (val); |
b5b8b0ac AO |
5333 | |
5334 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5335 | { | |
5336 | /* We can't dump the insn with a TREE where an RTX | |
5337 | is expected. */ | |
e8c6bb74 | 5338 | PAT_VAR_LOCATION_LOC (val) = const0_rtx; |
b5b8b0ac | 5339 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
e8c6bb74 | 5340 | PAT_VAR_LOCATION_LOC (val) = (rtx)value; |
b5b8b0ac AO |
5341 | } |
5342 | ||
ec8c1492 | 5343 | delink_debug_stmt: |
2a8e30fb MM |
5344 | /* In order not to generate too many debug temporaries, |
5345 | we delink all uses of debug statements we already expanded. | |
5346 | Therefore debug statements between definition and real | |
5347 | use of TERed SSA names will continue to use the SSA name, | |
5348 | and not be replaced with debug temps. */ | |
5349 | delink_stmt_imm_use (stmt); | |
5350 | ||
b5b8b0ac AO |
5351 | gsi = nsi; |
5352 | gsi_next (&nsi); | |
5353 | if (gsi_end_p (nsi)) | |
5354 | break; | |
5355 | stmt = gsi_stmt (nsi); | |
5356 | if (!gimple_debug_bind_p (stmt)) | |
5357 | break; | |
5358 | } | |
5359 | ||
5368224f | 5360 | set_curr_insn_location (sloc); |
ddb555ed JJ |
5361 | } |
5362 | else if (gimple_debug_source_bind_p (stmt)) | |
5363 | { | |
5368224f | 5364 | location_t sloc = curr_insn_location (); |
ddb555ed JJ |
5365 | tree var = gimple_debug_source_bind_get_var (stmt); |
5366 | tree value = gimple_debug_source_bind_get_value (stmt); | |
5367 | rtx val; | |
ef4bddc2 | 5368 | machine_mode mode; |
ddb555ed JJ |
5369 | |
5370 | last = get_last_insn (); | |
5371 | ||
5368224f | 5372 | set_curr_insn_location (gimple_location (stmt)); |
ddb555ed JJ |
5373 | |
5374 | mode = DECL_MODE (var); | |
5375 | ||
5376 | val = gen_rtx_VAR_LOCATION (mode, var, (rtx)value, | |
5377 | VAR_INIT_STATUS_UNINITIALIZED); | |
5378 | ||
5379 | emit_debug_insn (val); | |
5380 | ||
5381 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5382 | { | |
5383 | /* We can't dump the insn with a TREE where an RTX | |
5384 | is expected. */ | |
5385 | PAT_VAR_LOCATION_LOC (val) = const0_rtx; | |
5386 | maybe_dump_rtl_for_gimple_stmt (stmt, last); | |
5387 | PAT_VAR_LOCATION_LOC (val) = (rtx)value; | |
5388 | } | |
5389 | ||
5368224f | 5390 | set_curr_insn_location (sloc); |
b5b8b0ac | 5391 | } |
80c7a9eb | 5392 | else |
242229bb | 5393 | { |
538dd0b7 DM |
5394 | gcall *call_stmt = dyn_cast <gcall *> (stmt); |
5395 | if (call_stmt | |
5396 | && gimple_call_tail_p (call_stmt) | |
f3ddd692 | 5397 | && disable_tail_calls) |
538dd0b7 | 5398 | gimple_call_set_tail (call_stmt, false); |
f3ddd692 | 5399 | |
538dd0b7 | 5400 | if (call_stmt && gimple_call_tail_p (call_stmt)) |
cea49550 RH |
5401 | { |
5402 | bool can_fallthru; | |
538dd0b7 | 5403 | new_bb = expand_gimple_tailcall (bb, call_stmt, &can_fallthru); |
cea49550 RH |
5404 | if (new_bb) |
5405 | { | |
5406 | if (can_fallthru) | |
5407 | bb = new_bb; | |
5408 | else | |
5409 | return new_bb; | |
5410 | } | |
5411 | } | |
4d7a65ea | 5412 | else |
b7211528 | 5413 | { |
4e3825db | 5414 | def_operand_p def_p; |
4e3825db MM |
5415 | def_p = SINGLE_SSA_DEF_OPERAND (stmt, SSA_OP_DEF); |
5416 | ||
5417 | if (def_p != NULL) | |
5418 | { | |
5419 | /* Ignore this stmt if it is in the list of | |
5420 | replaceable expressions. */ | |
5421 | if (SA.values | |
b8698a0f | 5422 | && bitmap_bit_p (SA.values, |
e97809c6 | 5423 | SSA_NAME_VERSION (DEF_FROM_PTR (def_p)))) |
4e3825db MM |
5424 | continue; |
5425 | } | |
28ed065e | 5426 | last = expand_gimple_stmt (stmt); |
726a989a | 5427 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
b7211528 | 5428 | } |
242229bb JH |
5429 | } |
5430 | } | |
5431 | ||
a5883ba0 MM |
5432 | currently_expanding_gimple_stmt = NULL; |
5433 | ||
7241571e | 5434 | /* Expand implicit goto and convert goto_locus. */ |
a9b77cd1 ZD |
5435 | FOR_EACH_EDGE (e, ei, bb->succs) |
5436 | { | |
2f13f2de | 5437 | if (e->goto_locus != UNKNOWN_LOCATION) |
5368224f | 5438 | set_curr_insn_location (e->goto_locus); |
7241571e JJ |
5439 | if ((e->flags & EDGE_FALLTHRU) && e->dest != bb->next_bb) |
5440 | { | |
5441 | emit_jump (label_rtx_for_bb (e->dest)); | |
5442 | e->flags &= ~EDGE_FALLTHRU; | |
5443 | } | |
a9b77cd1 ZD |
5444 | } |
5445 | ||
ae761c45 AH |
5446 | /* Expanded RTL can create a jump in the last instruction of block. |
5447 | This later might be assumed to be a jump to successor and break edge insertion. | |
5448 | We need to insert dummy move to prevent this. PR41440. */ | |
5449 | if (single_succ_p (bb) | |
5450 | && (single_succ_edge (bb)->flags & EDGE_FALLTHRU) | |
5451 | && (last = get_last_insn ()) | |
5452 | && JUMP_P (last)) | |
5453 | { | |
5454 | rtx dummy = gen_reg_rtx (SImode); | |
5455 | emit_insn_after_noloc (gen_move_insn (dummy, dummy), last, NULL); | |
5456 | } | |
5457 | ||
242229bb JH |
5458 | do_pending_stack_adjust (); |
5459 | ||
3f117656 | 5460 | /* Find the block tail. The last insn in the block is the insn |
242229bb JH |
5461 | before a barrier and/or table jump insn. */ |
5462 | last = get_last_insn (); | |
4b4bf941 | 5463 | if (BARRIER_P (last)) |
242229bb JH |
5464 | last = PREV_INSN (last); |
5465 | if (JUMP_TABLE_DATA_P (last)) | |
5466 | last = PREV_INSN (PREV_INSN (last)); | |
1130d5e3 | 5467 | BB_END (bb) = last; |
caf93cb0 | 5468 | |
242229bb | 5469 | update_bb_for_insn (bb); |
80c7a9eb | 5470 | |
242229bb JH |
5471 | return bb; |
5472 | } | |
5473 | ||
5474 | ||
5475 | /* Create a basic block for initialization code. */ | |
5476 | ||
5477 | static basic_block | |
5478 | construct_init_block (void) | |
5479 | { | |
5480 | basic_block init_block, first_block; | |
fd44f634 JH |
5481 | edge e = NULL; |
5482 | int flags; | |
275a4187 | 5483 | |
fd44f634 | 5484 | /* Multiple entry points not supported yet. */ |
fefa31b5 DM |
5485 | gcc_assert (EDGE_COUNT (ENTRY_BLOCK_PTR_FOR_FN (cfun)->succs) == 1); |
5486 | init_rtl_bb_info (ENTRY_BLOCK_PTR_FOR_FN (cfun)); | |
5487 | init_rtl_bb_info (EXIT_BLOCK_PTR_FOR_FN (cfun)); | |
5488 | ENTRY_BLOCK_PTR_FOR_FN (cfun)->flags |= BB_RTL; | |
5489 | EXIT_BLOCK_PTR_FOR_FN (cfun)->flags |= BB_RTL; | |
242229bb | 5490 | |
fefa31b5 | 5491 | e = EDGE_SUCC (ENTRY_BLOCK_PTR_FOR_FN (cfun), 0); |
275a4187 | 5492 | |
fd44f634 JH |
5493 | /* When entry edge points to first basic block, we don't need jump, |
5494 | otherwise we have to jump into proper target. */ | |
fefa31b5 | 5495 | if (e && e->dest != ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb) |
fd44f634 | 5496 | { |
726a989a | 5497 | tree label = gimple_block_label (e->dest); |
fd44f634 | 5498 | |
1476d1bd | 5499 | emit_jump (jump_target_rtx (label)); |
fd44f634 | 5500 | flags = 0; |
275a4187 | 5501 | } |
fd44f634 JH |
5502 | else |
5503 | flags = EDGE_FALLTHRU; | |
242229bb JH |
5504 | |
5505 | init_block = create_basic_block (NEXT_INSN (get_insns ()), | |
5506 | get_last_insn (), | |
fefa31b5 DM |
5507 | ENTRY_BLOCK_PTR_FOR_FN (cfun)); |
5508 | init_block->frequency = ENTRY_BLOCK_PTR_FOR_FN (cfun)->frequency; | |
5509 | init_block->count = ENTRY_BLOCK_PTR_FOR_FN (cfun)->count; | |
726338f4 | 5510 | add_bb_to_loop (init_block, ENTRY_BLOCK_PTR_FOR_FN (cfun)->loop_father); |
242229bb JH |
5511 | if (e) |
5512 | { | |
5513 | first_block = e->dest; | |
5514 | redirect_edge_succ (e, init_block); | |
fd44f634 | 5515 | e = make_edge (init_block, first_block, flags); |
242229bb JH |
5516 | } |
5517 | else | |
fefa31b5 | 5518 | e = make_edge (init_block, EXIT_BLOCK_PTR_FOR_FN (cfun), EDGE_FALLTHRU); |
242229bb | 5519 | e->probability = REG_BR_PROB_BASE; |
fefa31b5 | 5520 | e->count = ENTRY_BLOCK_PTR_FOR_FN (cfun)->count; |
242229bb JH |
5521 | |
5522 | update_bb_for_insn (init_block); | |
5523 | return init_block; | |
5524 | } | |
5525 | ||
55e092c4 JH |
5526 | /* For each lexical block, set BLOCK_NUMBER to the depth at which it is |
5527 | found in the block tree. */ | |
5528 | ||
5529 | static void | |
5530 | set_block_levels (tree block, int level) | |
5531 | { | |
5532 | while (block) | |
5533 | { | |
5534 | BLOCK_NUMBER (block) = level; | |
5535 | set_block_levels (BLOCK_SUBBLOCKS (block), level + 1); | |
5536 | block = BLOCK_CHAIN (block); | |
5537 | } | |
5538 | } | |
242229bb JH |
5539 | |
5540 | /* Create a block containing landing pads and similar stuff. */ | |
5541 | ||
5542 | static void | |
5543 | construct_exit_block (void) | |
5544 | { | |
b47aae36 DM |
5545 | rtx_insn *head = get_last_insn (); |
5546 | rtx_insn *end; | |
242229bb | 5547 | basic_block exit_block; |
628f6a4e BE |
5548 | edge e, e2; |
5549 | unsigned ix; | |
5550 | edge_iterator ei; | |
79c7fda6 | 5551 | basic_block prev_bb = EXIT_BLOCK_PTR_FOR_FN (cfun)->prev_bb; |
b47aae36 | 5552 | rtx_insn *orig_end = BB_END (prev_bb); |
242229bb | 5553 | |
fefa31b5 | 5554 | rtl_profile_for_bb (EXIT_BLOCK_PTR_FOR_FN (cfun)); |
bf08ebeb | 5555 | |
caf93cb0 | 5556 | /* Make sure the locus is set to the end of the function, so that |
242229bb | 5557 | epilogue line numbers and warnings are set properly. */ |
2f13f2de | 5558 | if (LOCATION_LOCUS (cfun->function_end_locus) != UNKNOWN_LOCATION) |
242229bb JH |
5559 | input_location = cfun->function_end_locus; |
5560 | ||
242229bb JH |
5561 | /* Generate rtl for function exit. */ |
5562 | expand_function_end (); | |
5563 | ||
5564 | end = get_last_insn (); | |
5565 | if (head == end) | |
5566 | return; | |
79c7fda6 JJ |
5567 | /* While emitting the function end we could move end of the last basic |
5568 | block. */ | |
1130d5e3 | 5569 | BB_END (prev_bb) = orig_end; |
4b4bf941 | 5570 | while (NEXT_INSN (head) && NOTE_P (NEXT_INSN (head))) |
242229bb | 5571 | head = NEXT_INSN (head); |
79c7fda6 JJ |
5572 | /* But make sure exit_block starts with RETURN_LABEL, otherwise the |
5573 | bb frequency counting will be confused. Any instructions before that | |
5574 | label are emitted for the case where PREV_BB falls through into the | |
5575 | exit block, so append those instructions to prev_bb in that case. */ | |
5576 | if (NEXT_INSN (head) != return_label) | |
5577 | { | |
5578 | while (NEXT_INSN (head) != return_label) | |
5579 | { | |
5580 | if (!NOTE_P (NEXT_INSN (head))) | |
1130d5e3 | 5581 | BB_END (prev_bb) = NEXT_INSN (head); |
79c7fda6 JJ |
5582 | head = NEXT_INSN (head); |
5583 | } | |
5584 | } | |
5585 | exit_block = create_basic_block (NEXT_INSN (head), end, prev_bb); | |
fefa31b5 DM |
5586 | exit_block->frequency = EXIT_BLOCK_PTR_FOR_FN (cfun)->frequency; |
5587 | exit_block->count = EXIT_BLOCK_PTR_FOR_FN (cfun)->count; | |
726338f4 | 5588 | add_bb_to_loop (exit_block, EXIT_BLOCK_PTR_FOR_FN (cfun)->loop_father); |
628f6a4e BE |
5589 | |
5590 | ix = 0; | |
fefa31b5 | 5591 | while (ix < EDGE_COUNT (EXIT_BLOCK_PTR_FOR_FN (cfun)->preds)) |
242229bb | 5592 | { |
fefa31b5 | 5593 | e = EDGE_PRED (EXIT_BLOCK_PTR_FOR_FN (cfun), ix); |
242229bb | 5594 | if (!(e->flags & EDGE_ABNORMAL)) |
628f6a4e BE |
5595 | redirect_edge_succ (e, exit_block); |
5596 | else | |
5597 | ix++; | |
242229bb | 5598 | } |
628f6a4e | 5599 | |
fefa31b5 | 5600 | e = make_edge (exit_block, EXIT_BLOCK_PTR_FOR_FN (cfun), EDGE_FALLTHRU); |
242229bb | 5601 | e->probability = REG_BR_PROB_BASE; |
fefa31b5 DM |
5602 | e->count = EXIT_BLOCK_PTR_FOR_FN (cfun)->count; |
5603 | FOR_EACH_EDGE (e2, ei, EXIT_BLOCK_PTR_FOR_FN (cfun)->preds) | |
242229bb JH |
5604 | if (e2 != e) |
5605 | { | |
c22cacf3 | 5606 | e->count -= e2->count; |
242229bb JH |
5607 | exit_block->count -= e2->count; |
5608 | exit_block->frequency -= EDGE_FREQUENCY (e2); | |
5609 | } | |
5610 | if (e->count < 0) | |
5611 | e->count = 0; | |
5612 | if (exit_block->count < 0) | |
5613 | exit_block->count = 0; | |
5614 | if (exit_block->frequency < 0) | |
5615 | exit_block->frequency = 0; | |
5616 | update_bb_for_insn (exit_block); | |
5617 | } | |
5618 | ||
c22cacf3 | 5619 | /* Helper function for discover_nonconstant_array_refs. |
a1b23b2f UW |
5620 | Look for ARRAY_REF nodes with non-constant indexes and mark them |
5621 | addressable. */ | |
5622 | ||
5623 | static tree | |
5624 | discover_nonconstant_array_refs_r (tree * tp, int *walk_subtrees, | |
5625 | void *data ATTRIBUTE_UNUSED) | |
5626 | { | |
5627 | tree t = *tp; | |
5628 | ||
5629 | if (IS_TYPE_OR_DECL_P (t)) | |
5630 | *walk_subtrees = 0; | |
5631 | else if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5632 | { | |
5633 | while (((TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5634 | && is_gimple_min_invariant (TREE_OPERAND (t, 1)) | |
5635 | && (!TREE_OPERAND (t, 2) | |
5636 | || is_gimple_min_invariant (TREE_OPERAND (t, 2)))) | |
5637 | || (TREE_CODE (t) == COMPONENT_REF | |
5638 | && (!TREE_OPERAND (t,2) | |
5639 | || is_gimple_min_invariant (TREE_OPERAND (t, 2)))) | |
5640 | || TREE_CODE (t) == BIT_FIELD_REF | |
5641 | || TREE_CODE (t) == REALPART_EXPR | |
5642 | || TREE_CODE (t) == IMAGPART_EXPR | |
5643 | || TREE_CODE (t) == VIEW_CONVERT_EXPR | |
1043771b | 5644 | || CONVERT_EXPR_P (t)) |
a1b23b2f UW |
5645 | t = TREE_OPERAND (t, 0); |
5646 | ||
5647 | if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5648 | { | |
5649 | t = get_base_address (t); | |
6f11d690 RG |
5650 | if (t && DECL_P (t) |
5651 | && DECL_MODE (t) != BLKmode) | |
a1b23b2f UW |
5652 | TREE_ADDRESSABLE (t) = 1; |
5653 | } | |
5654 | ||
5655 | *walk_subtrees = 0; | |
5656 | } | |
5657 | ||
5658 | return NULL_TREE; | |
5659 | } | |
5660 | ||
5661 | /* RTL expansion is not able to compile array references with variable | |
5662 | offsets for arrays stored in single register. Discover such | |
5663 | expressions and mark variables as addressable to avoid this | |
5664 | scenario. */ | |
5665 | ||
5666 | static void | |
5667 | discover_nonconstant_array_refs (void) | |
5668 | { | |
5669 | basic_block bb; | |
726a989a | 5670 | gimple_stmt_iterator gsi; |
a1b23b2f | 5671 | |
11cd3bed | 5672 | FOR_EACH_BB_FN (bb, cfun) |
726a989a RB |
5673 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
5674 | { | |
5675 | gimple stmt = gsi_stmt (gsi); | |
aa847cc8 JJ |
5676 | if (!is_gimple_debug (stmt)) |
5677 | walk_gimple_op (stmt, discover_nonconstant_array_refs_r, NULL); | |
726a989a | 5678 | } |
a1b23b2f UW |
5679 | } |
5680 | ||
2e3f842f L |
5681 | /* This function sets crtl->args.internal_arg_pointer to a virtual |
5682 | register if DRAP is needed. Local register allocator will replace | |
5683 | virtual_incoming_args_rtx with the virtual register. */ | |
5684 | ||
5685 | static void | |
5686 | expand_stack_alignment (void) | |
5687 | { | |
5688 | rtx drap_rtx; | |
e939805b | 5689 | unsigned int preferred_stack_boundary; |
2e3f842f L |
5690 | |
5691 | if (! SUPPORTS_STACK_ALIGNMENT) | |
5692 | return; | |
b8698a0f | 5693 | |
2e3f842f L |
5694 | if (cfun->calls_alloca |
5695 | || cfun->has_nonlocal_label | |
5696 | || crtl->has_nonlocal_goto) | |
5697 | crtl->need_drap = true; | |
5698 | ||
890b9b96 L |
5699 | /* Call update_stack_boundary here again to update incoming stack |
5700 | boundary. It may set incoming stack alignment to a different | |
5701 | value after RTL expansion. TARGET_FUNCTION_OK_FOR_SIBCALL may | |
5702 | use the minimum incoming stack alignment to check if it is OK | |
5703 | to perform sibcall optimization since sibcall optimization will | |
5704 | only align the outgoing stack to incoming stack boundary. */ | |
5705 | if (targetm.calls.update_stack_boundary) | |
5706 | targetm.calls.update_stack_boundary (); | |
5707 | ||
5708 | /* The incoming stack frame has to be aligned at least at | |
5709 | parm_stack_boundary. */ | |
5710 | gcc_assert (crtl->parm_stack_boundary <= INCOMING_STACK_BOUNDARY); | |
2e3f842f | 5711 | |
2e3f842f L |
5712 | /* Update crtl->stack_alignment_estimated and use it later to align |
5713 | stack. We check PREFERRED_STACK_BOUNDARY if there may be non-call | |
5714 | exceptions since callgraph doesn't collect incoming stack alignment | |
5715 | in this case. */ | |
8f4f502f | 5716 | if (cfun->can_throw_non_call_exceptions |
2e3f842f L |
5717 | && PREFERRED_STACK_BOUNDARY > crtl->preferred_stack_boundary) |
5718 | preferred_stack_boundary = PREFERRED_STACK_BOUNDARY; | |
5719 | else | |
5720 | preferred_stack_boundary = crtl->preferred_stack_boundary; | |
5721 | if (preferred_stack_boundary > crtl->stack_alignment_estimated) | |
5722 | crtl->stack_alignment_estimated = preferred_stack_boundary; | |
5723 | if (preferred_stack_boundary > crtl->stack_alignment_needed) | |
5724 | crtl->stack_alignment_needed = preferred_stack_boundary; | |
5725 | ||
890b9b96 L |
5726 | gcc_assert (crtl->stack_alignment_needed |
5727 | <= crtl->stack_alignment_estimated); | |
5728 | ||
2e3f842f | 5729 | crtl->stack_realign_needed |
e939805b | 5730 | = INCOMING_STACK_BOUNDARY < crtl->stack_alignment_estimated; |
d2d93c32 | 5731 | crtl->stack_realign_tried = crtl->stack_realign_needed; |
2e3f842f L |
5732 | |
5733 | crtl->stack_realign_processed = true; | |
5734 | ||
5735 | /* Target has to redefine TARGET_GET_DRAP_RTX to support stack | |
5736 | alignment. */ | |
5737 | gcc_assert (targetm.calls.get_drap_rtx != NULL); | |
b8698a0f | 5738 | drap_rtx = targetm.calls.get_drap_rtx (); |
2e3f842f | 5739 | |
d015f7cc L |
5740 | /* stack_realign_drap and drap_rtx must match. */ |
5741 | gcc_assert ((stack_realign_drap != 0) == (drap_rtx != NULL)); | |
5742 | ||
2e3f842f L |
5743 | /* Do nothing if NULL is returned, which means DRAP is not needed. */ |
5744 | if (NULL != drap_rtx) | |
5745 | { | |
5746 | crtl->args.internal_arg_pointer = drap_rtx; | |
5747 | ||
5748 | /* Call fixup_tail_calls to clean up REG_EQUIV note if DRAP is | |
5749 | needed. */ | |
5750 | fixup_tail_calls (); | |
5751 | } | |
5752 | } | |
862d0b35 DN |
5753 | \f |
5754 | ||
5755 | static void | |
5756 | expand_main_function (void) | |
5757 | { | |
5758 | #if (defined(INVOKE__main) \ | |
5759 | || (!defined(HAS_INIT_SECTION) \ | |
5760 | && !defined(INIT_SECTION_ASM_OP) \ | |
5761 | && !defined(INIT_ARRAY_SECTION_ASM_OP))) | |
5762 | emit_library_call (init_one_libfunc (NAME__MAIN), LCT_NORMAL, VOIDmode, 0); | |
5763 | #endif | |
5764 | } | |
5765 | \f | |
5766 | ||
5767 | /* Expand code to initialize the stack_protect_guard. This is invoked at | |
5768 | the beginning of a function to be protected. */ | |
5769 | ||
5770 | #ifndef HAVE_stack_protect_set | |
5771 | # define HAVE_stack_protect_set 0 | |
5772 | # define gen_stack_protect_set(x,y) (gcc_unreachable (), NULL_RTX) | |
5773 | #endif | |
5774 | ||
5775 | static void | |
5776 | stack_protect_prologue (void) | |
5777 | { | |
5778 | tree guard_decl = targetm.stack_protect_guard (); | |
5779 | rtx x, y; | |
5780 | ||
5781 | x = expand_normal (crtl->stack_protect_guard); | |
5782 | y = expand_normal (guard_decl); | |
5783 | ||
5784 | /* Allow the target to copy from Y to X without leaking Y into a | |
5785 | register. */ | |
5786 | if (HAVE_stack_protect_set) | |
5787 | { | |
5788 | rtx insn = gen_stack_protect_set (x, y); | |
5789 | if (insn) | |
5790 | { | |
5791 | emit_insn (insn); | |
5792 | return; | |
5793 | } | |
5794 | } | |
5795 | ||
5796 | /* Otherwise do a straight move. */ | |
5797 | emit_move_insn (x, y); | |
5798 | } | |
2e3f842f | 5799 | |
242229bb JH |
5800 | /* Translate the intermediate representation contained in the CFG |
5801 | from GIMPLE trees to RTL. | |
5802 | ||
5803 | We do conversion per basic block and preserve/update the tree CFG. | |
5804 | This implies we have to do some magic as the CFG can simultaneously | |
5805 | consist of basic blocks containing RTL and GIMPLE trees. This can | |
61ada8ae | 5806 | confuse the CFG hooks, so be careful to not manipulate CFG during |
242229bb JH |
5807 | the expansion. */ |
5808 | ||
be55bfe6 TS |
5809 | namespace { |
5810 | ||
5811 | const pass_data pass_data_expand = | |
5812 | { | |
5813 | RTL_PASS, /* type */ | |
5814 | "expand", /* name */ | |
5815 | OPTGROUP_NONE, /* optinfo_flags */ | |
be55bfe6 TS |
5816 | TV_EXPAND, /* tv_id */ |
5817 | ( PROP_ssa | PROP_gimple_leh | PROP_cfg | |
5818 | | PROP_gimple_lcx | |
f8e89441 TV |
5819 | | PROP_gimple_lvec |
5820 | | PROP_gimple_lva), /* properties_required */ | |
be55bfe6 TS |
5821 | PROP_rtl, /* properties_provided */ |
5822 | ( PROP_ssa | PROP_trees ), /* properties_destroyed */ | |
3bea341f | 5823 | 0, /* todo_flags_start */ |
be55bfe6 TS |
5824 | 0, /* todo_flags_finish */ |
5825 | }; | |
5826 | ||
5827 | class pass_expand : public rtl_opt_pass | |
5828 | { | |
5829 | public: | |
5830 | pass_expand (gcc::context *ctxt) | |
5831 | : rtl_opt_pass (pass_data_expand, ctxt) | |
5832 | {} | |
5833 | ||
5834 | /* opt_pass methods: */ | |
5835 | virtual unsigned int execute (function *); | |
5836 | ||
5837 | }; // class pass_expand | |
5838 | ||
5839 | unsigned int | |
5840 | pass_expand::execute (function *fun) | |
242229bb JH |
5841 | { |
5842 | basic_block bb, init_block; | |
5843 | sbitmap blocks; | |
0ef90296 ZD |
5844 | edge_iterator ei; |
5845 | edge e; | |
b47aae36 | 5846 | rtx_insn *var_seq, *var_ret_seq; |
4e3825db MM |
5847 | unsigned i; |
5848 | ||
f029db69 | 5849 | timevar_push (TV_OUT_OF_SSA); |
4e3825db | 5850 | rewrite_out_of_ssa (&SA); |
f029db69 | 5851 | timevar_pop (TV_OUT_OF_SSA); |
c302207e | 5852 | SA.partition_to_pseudo = XCNEWVEC (rtx, SA.map->num_partitions); |
242229bb | 5853 | |
dfde35b3 JJ |
5854 | if (MAY_HAVE_DEBUG_STMTS && flag_tree_ter) |
5855 | { | |
5856 | gimple_stmt_iterator gsi; | |
5857 | FOR_EACH_BB_FN (bb, cfun) | |
5858 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
5859 | if (gimple_debug_bind_p (gsi_stmt (gsi))) | |
5860 | avoid_deep_ter_for_debug (gsi_stmt (gsi), 0); | |
5861 | } | |
5862 | ||
be147e84 RG |
5863 | /* Make sure all values used by the optimization passes have sane |
5864 | defaults. */ | |
5865 | reg_renumber = 0; | |
5866 | ||
4586b4ca SB |
5867 | /* Some backends want to know that we are expanding to RTL. */ |
5868 | currently_expanding_to_rtl = 1; | |
cd7d9fd7 RG |
5869 | /* Dominators are not kept up-to-date as we may create new basic-blocks. */ |
5870 | free_dominance_info (CDI_DOMINATORS); | |
4586b4ca | 5871 | |
be55bfe6 | 5872 | rtl_profile_for_bb (ENTRY_BLOCK_PTR_FOR_FN (fun)); |
bf08ebeb | 5873 | |
d5e254e1 IE |
5874 | if (chkp_function_instrumented_p (current_function_decl)) |
5875 | chkp_reset_rtl_bounds (); | |
5876 | ||
5368224f | 5877 | insn_locations_init (); |
fe8a7779 | 5878 | if (!DECL_IS_BUILTIN (current_function_decl)) |
1751ecd6 AH |
5879 | { |
5880 | /* Eventually, all FEs should explicitly set function_start_locus. */ | |
be55bfe6 TS |
5881 | if (LOCATION_LOCUS (fun->function_start_locus) == UNKNOWN_LOCATION) |
5882 | set_curr_insn_location | |
5883 | (DECL_SOURCE_LOCATION (current_function_decl)); | |
1751ecd6 | 5884 | else |
be55bfe6 | 5885 | set_curr_insn_location (fun->function_start_locus); |
1751ecd6 | 5886 | } |
9ff70652 | 5887 | else |
5368224f DC |
5888 | set_curr_insn_location (UNKNOWN_LOCATION); |
5889 | prologue_location = curr_insn_location (); | |
55e092c4 | 5890 | |
2b21299c JJ |
5891 | #ifdef INSN_SCHEDULING |
5892 | init_sched_attrs (); | |
5893 | #endif | |
5894 | ||
55e092c4 JH |
5895 | /* Make sure first insn is a note even if we don't want linenums. |
5896 | This makes sure the first insn will never be deleted. | |
5897 | Also, final expects a note to appear there. */ | |
5898 | emit_note (NOTE_INSN_DELETED); | |
6429e3be | 5899 | |
a1b23b2f UW |
5900 | /* Mark arrays indexed with non-constant indices with TREE_ADDRESSABLE. */ |
5901 | discover_nonconstant_array_refs (); | |
5902 | ||
e41b2a33 | 5903 | targetm.expand_to_rtl_hook (); |
cb91fab0 | 5904 | crtl->stack_alignment_needed = STACK_BOUNDARY; |
2e3f842f | 5905 | crtl->max_used_stack_slot_alignment = STACK_BOUNDARY; |
890b9b96 | 5906 | crtl->stack_alignment_estimated = 0; |
cb91fab0 | 5907 | crtl->preferred_stack_boundary = STACK_BOUNDARY; |
be55bfe6 | 5908 | fun->cfg->max_jumptable_ents = 0; |
cb91fab0 | 5909 | |
ae9fd6b7 JH |
5910 | /* Resovle the function section. Some targets, like ARM EABI rely on knowledge |
5911 | of the function section at exapnsion time to predict distance of calls. */ | |
5912 | resolve_unique_section (current_function_decl, 0, flag_function_sections); | |
5913 | ||
727a31fa | 5914 | /* Expand the variables recorded during gimple lowering. */ |
f029db69 | 5915 | timevar_push (TV_VAR_EXPAND); |
3a42502d RH |
5916 | start_sequence (); |
5917 | ||
f3ddd692 | 5918 | var_ret_seq = expand_used_vars (); |
3a42502d RH |
5919 | |
5920 | var_seq = get_insns (); | |
5921 | end_sequence (); | |
f029db69 | 5922 | timevar_pop (TV_VAR_EXPAND); |
242229bb | 5923 | |
7d69de61 RH |
5924 | /* Honor stack protection warnings. */ |
5925 | if (warn_stack_protect) | |
5926 | { | |
be55bfe6 | 5927 | if (fun->calls_alloca) |
b8698a0f | 5928 | warning (OPT_Wstack_protector, |
3b123595 | 5929 | "stack protector not protecting local variables: " |
be55bfe6 | 5930 | "variable length buffer"); |
cb91fab0 | 5931 | if (has_short_buffer && !crtl->stack_protect_guard) |
b8698a0f | 5932 | warning (OPT_Wstack_protector, |
3b123595 | 5933 | "stack protector not protecting function: " |
be55bfe6 | 5934 | "all local arrays are less than %d bytes long", |
7d69de61 RH |
5935 | (int) PARAM_VALUE (PARAM_SSP_BUFFER_SIZE)); |
5936 | } | |
5937 | ||
242229bb | 5938 | /* Set up parameters and prepare for return, for the function. */ |
b79c5284 | 5939 | expand_function_start (current_function_decl); |
242229bb | 5940 | |
3a42502d RH |
5941 | /* If we emitted any instructions for setting up the variables, |
5942 | emit them before the FUNCTION_START note. */ | |
5943 | if (var_seq) | |
5944 | { | |
5945 | emit_insn_before (var_seq, parm_birth_insn); | |
5946 | ||
5947 | /* In expand_function_end we'll insert the alloca save/restore | |
5948 | before parm_birth_insn. We've just insertted an alloca call. | |
5949 | Adjust the pointer to match. */ | |
5950 | parm_birth_insn = var_seq; | |
5951 | } | |
5952 | ||
0f9f9784 AO |
5953 | /* Now that we also have the parameter RTXs, copy them over to our |
5954 | partitions. */ | |
5955 | for (i = 0; i < SA.map->num_partitions; i++) | |
5956 | { | |
5957 | tree var = SSA_NAME_VAR (partition_to_var (SA.map, i)); | |
5958 | ||
5959 | if (TREE_CODE (var) != VAR_DECL | |
5960 | && !SA.partition_to_pseudo[i]) | |
5961 | SA.partition_to_pseudo[i] = DECL_RTL_IF_SET (var); | |
5962 | gcc_assert (SA.partition_to_pseudo[i]); | |
5963 | ||
5964 | /* If this decl was marked as living in multiple places, reset | |
5965 | this now to NULL. */ | |
5966 | if (DECL_RTL_IF_SET (var) == pc_rtx) | |
5967 | SET_DECL_RTL (var, NULL); | |
5968 | ||
5969 | /* Some RTL parts really want to look at DECL_RTL(x) when x | |
5970 | was a decl marked in REG_ATTR or MEM_ATTR. We could use | |
5971 | SET_DECL_RTL here making this available, but that would mean | |
5972 | to select one of the potentially many RTLs for one DECL. Instead | |
5973 | of doing that we simply reset the MEM_EXPR of the RTL in question, | |
5974 | then nobody can get at it and hence nobody can call DECL_RTL on it. */ | |
5975 | if (!DECL_RTL_SET_P (var)) | |
5976 | { | |
5977 | if (MEM_P (SA.partition_to_pseudo[i])) | |
5978 | set_mem_expr (SA.partition_to_pseudo[i], NULL); | |
5979 | } | |
5980 | } | |
5981 | ||
d466b407 MM |
5982 | /* If we have a class containing differently aligned pointers |
5983 | we need to merge those into the corresponding RTL pointer | |
5984 | alignment. */ | |
5985 | for (i = 1; i < num_ssa_names; i++) | |
5986 | { | |
5987 | tree name = ssa_name (i); | |
5988 | int part; | |
0f9f9784 | 5989 | rtx r; |
d466b407 MM |
5990 | |
5991 | if (!name | |
d466b407 MM |
5992 | /* We might have generated new SSA names in |
5993 | update_alias_info_with_stack_vars. They will have a NULL | |
5994 | defining statements, and won't be part of the partitioning, | |
5995 | so ignore those. */ | |
5996 | || !SSA_NAME_DEF_STMT (name)) | |
5997 | continue; | |
5998 | part = var_to_partition (SA.map, name); | |
5999 | if (part == NO_PARTITION) | |
6000 | continue; | |
70b5e7dc | 6001 | |
0f9f9784 AO |
6002 | /* Adjust all partition members to get the underlying decl of |
6003 | the representative which we might have created in expand_one_var. */ | |
6004 | if (SSA_NAME_VAR (name) == NULL_TREE) | |
70b5e7dc | 6005 | { |
0f9f9784 AO |
6006 | tree leader = partition_to_var (SA.map, part); |
6007 | gcc_assert (SSA_NAME_VAR (leader) != NULL_TREE); | |
6008 | replace_ssa_name_symbol (name, SSA_NAME_VAR (leader)); | |
70b5e7dc | 6009 | } |
0f9f9784 AO |
6010 | if (!POINTER_TYPE_P (TREE_TYPE (name))) |
6011 | continue; | |
6012 | ||
6013 | r = SA.partition_to_pseudo[part]; | |
6014 | if (REG_P (r)) | |
6015 | mark_reg_pointer (r, get_pointer_alignment (name)); | |
d466b407 MM |
6016 | } |
6017 | ||
242229bb JH |
6018 | /* If this function is `main', emit a call to `__main' |
6019 | to run global initializers, etc. */ | |
6020 | if (DECL_NAME (current_function_decl) | |
6021 | && MAIN_NAME_P (DECL_NAME (current_function_decl)) | |
6022 | && DECL_FILE_SCOPE_P (current_function_decl)) | |
6023 | expand_main_function (); | |
6024 | ||
7d69de61 RH |
6025 | /* Initialize the stack_protect_guard field. This must happen after the |
6026 | call to __main (if any) so that the external decl is initialized. */ | |
cb91fab0 | 6027 | if (crtl->stack_protect_guard) |
7d69de61 RH |
6028 | stack_protect_prologue (); |
6029 | ||
4e3825db MM |
6030 | expand_phi_nodes (&SA); |
6031 | ||
3fbd86b1 | 6032 | /* Register rtl specific functions for cfg. */ |
242229bb JH |
6033 | rtl_register_cfg_hooks (); |
6034 | ||
6035 | init_block = construct_init_block (); | |
6036 | ||
0ef90296 | 6037 | /* Clear EDGE_EXECUTABLE on the entry edge(s). It is cleaned from the |
4e3825db | 6038 | remaining edges later. */ |
be55bfe6 | 6039 | FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR_FOR_FN (fun)->succs) |
0ef90296 ZD |
6040 | e->flags &= ~EDGE_EXECUTABLE; |
6041 | ||
134aa83c | 6042 | lab_rtx_for_bb = new hash_map<basic_block, rtx_code_label *>; |
be55bfe6 | 6043 | FOR_BB_BETWEEN (bb, init_block->next_bb, EXIT_BLOCK_PTR_FOR_FN (fun), |
fefa31b5 | 6044 | next_bb) |
f3ddd692 | 6045 | bb = expand_gimple_basic_block (bb, var_ret_seq != NULL_RTX); |
bf08ebeb | 6046 | |
b5b8b0ac AO |
6047 | if (MAY_HAVE_DEBUG_INSNS) |
6048 | expand_debug_locations (); | |
6049 | ||
dfde35b3 JJ |
6050 | if (deep_ter_debug_map) |
6051 | { | |
6052 | delete deep_ter_debug_map; | |
6053 | deep_ter_debug_map = NULL; | |
6054 | } | |
6055 | ||
452aa9c5 RG |
6056 | /* Free stuff we no longer need after GIMPLE optimizations. */ |
6057 | free_dominance_info (CDI_DOMINATORS); | |
6058 | free_dominance_info (CDI_POST_DOMINATORS); | |
6059 | delete_tree_cfg_annotations (); | |
6060 | ||
f029db69 | 6061 | timevar_push (TV_OUT_OF_SSA); |
4e3825db | 6062 | finish_out_of_ssa (&SA); |
f029db69 | 6063 | timevar_pop (TV_OUT_OF_SSA); |
4e3825db | 6064 | |
f029db69 | 6065 | timevar_push (TV_POST_EXPAND); |
91753e21 | 6066 | /* We are no longer in SSA form. */ |
be55bfe6 | 6067 | fun->gimple_df->in_ssa_p = false; |
726338f4 | 6068 | loops_state_clear (LOOP_CLOSED_SSA); |
91753e21 | 6069 | |
bf08ebeb JH |
6070 | /* Expansion is used by optimization passes too, set maybe_hot_insn_p |
6071 | conservatively to true until they are all profile aware. */ | |
39c8aaa4 | 6072 | delete lab_rtx_for_bb; |
cb91fab0 | 6073 | free_histograms (); |
242229bb JH |
6074 | |
6075 | construct_exit_block (); | |
5368224f | 6076 | insn_locations_finalize (); |
242229bb | 6077 | |
f3ddd692 JJ |
6078 | if (var_ret_seq) |
6079 | { | |
dc01c3d1 | 6080 | rtx_insn *after = return_label; |
b47aae36 | 6081 | rtx_insn *next = NEXT_INSN (after); |
f3ddd692 JJ |
6082 | if (next && NOTE_INSN_BASIC_BLOCK_P (next)) |
6083 | after = next; | |
6084 | emit_insn_after (var_ret_seq, after); | |
6085 | } | |
6086 | ||
1d65f45c | 6087 | /* Zap the tree EH table. */ |
be55bfe6 | 6088 | set_eh_throw_stmt_table (fun, NULL); |
242229bb | 6089 | |
42821aff MM |
6090 | /* We need JUMP_LABEL be set in order to redirect jumps, and hence |
6091 | split edges which edge insertions might do. */ | |
242229bb | 6092 | rebuild_jump_labels (get_insns ()); |
242229bb | 6093 | |
be55bfe6 TS |
6094 | FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (fun), |
6095 | EXIT_BLOCK_PTR_FOR_FN (fun), next_bb) | |
4e3825db MM |
6096 | { |
6097 | edge e; | |
6098 | edge_iterator ei; | |
6099 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) | |
6100 | { | |
6101 | if (e->insns.r) | |
bc470c24 | 6102 | { |
3ffa95c2 | 6103 | rebuild_jump_labels_chain (e->insns.r); |
e40191f1 TV |
6104 | /* Put insns after parm birth, but before |
6105 | NOTE_INSNS_FUNCTION_BEG. */ | |
be55bfe6 TS |
6106 | if (e->src == ENTRY_BLOCK_PTR_FOR_FN (fun) |
6107 | && single_succ_p (ENTRY_BLOCK_PTR_FOR_FN (fun))) | |
bc470c24 | 6108 | { |
3ffa95c2 DM |
6109 | rtx_insn *insns = e->insns.r; |
6110 | e->insns.r = NULL; | |
e40191f1 TV |
6111 | if (NOTE_P (parm_birth_insn) |
6112 | && NOTE_KIND (parm_birth_insn) == NOTE_INSN_FUNCTION_BEG) | |
6113 | emit_insn_before_noloc (insns, parm_birth_insn, e->dest); | |
6114 | else | |
6115 | emit_insn_after_noloc (insns, parm_birth_insn, e->dest); | |
bc470c24 JJ |
6116 | } |
6117 | else | |
6118 | commit_one_edge_insertion (e); | |
6119 | } | |
4e3825db MM |
6120 | else |
6121 | ei_next (&ei); | |
6122 | } | |
6123 | } | |
6124 | ||
6125 | /* We're done expanding trees to RTL. */ | |
6126 | currently_expanding_to_rtl = 0; | |
6127 | ||
be55bfe6 TS |
6128 | FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (fun)->next_bb, |
6129 | EXIT_BLOCK_PTR_FOR_FN (fun), next_bb) | |
4e3825db MM |
6130 | { |
6131 | edge e; | |
6132 | edge_iterator ei; | |
6133 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) | |
6134 | { | |
6135 | /* Clear EDGE_EXECUTABLE. This flag is never used in the backend. */ | |
6136 | e->flags &= ~EDGE_EXECUTABLE; | |
6137 | ||
6138 | /* At the moment not all abnormal edges match the RTL | |
6139 | representation. It is safe to remove them here as | |
6140 | find_many_sub_basic_blocks will rediscover them. | |
6141 | In the future we should get this fixed properly. */ | |
6142 | if ((e->flags & EDGE_ABNORMAL) | |
6143 | && !(e->flags & EDGE_SIBCALL)) | |
6144 | remove_edge (e); | |
6145 | else | |
6146 | ei_next (&ei); | |
6147 | } | |
6148 | } | |
6149 | ||
be55bfe6 | 6150 | blocks = sbitmap_alloc (last_basic_block_for_fn (fun)); |
f61e445a | 6151 | bitmap_ones (blocks); |
242229bb | 6152 | find_many_sub_basic_blocks (blocks); |
242229bb | 6153 | sbitmap_free (blocks); |
4e3825db | 6154 | purge_all_dead_edges (); |
242229bb | 6155 | |
2e3f842f L |
6156 | expand_stack_alignment (); |
6157 | ||
be147e84 RG |
6158 | /* Fixup REG_EQUIV notes in the prologue if there are tailcalls in this |
6159 | function. */ | |
6160 | if (crtl->tail_call_emit) | |
6161 | fixup_tail_calls (); | |
6162 | ||
dac1fbf8 RG |
6163 | /* After initial rtl generation, call back to finish generating |
6164 | exception support code. We need to do this before cleaning up | |
6165 | the CFG as the code does not expect dead landing pads. */ | |
be55bfe6 | 6166 | if (fun->eh->region_tree != NULL) |
dac1fbf8 RG |
6167 | finish_eh_generation (); |
6168 | ||
6169 | /* Remove unreachable blocks, otherwise we cannot compute dominators | |
6170 | which are needed for loop state verification. As a side-effect | |
6171 | this also compacts blocks. | |
6172 | ??? We cannot remove trivially dead insns here as for example | |
6173 | the DRAP reg on i?86 is not magically live at this point. | |
6174 | gcc.c-torture/execute/ipa-sra-2.c execution, -Os -m32 fails otherwise. */ | |
6175 | cleanup_cfg (CLEANUP_NO_INSN_DEL); | |
6176 | ||
242229bb | 6177 | #ifdef ENABLE_CHECKING |
62e5bf5d | 6178 | verify_flow_info (); |
242229bb | 6179 | #endif |
9f8628ba | 6180 | |
be147e84 RG |
6181 | /* Initialize pseudos allocated for hard registers. */ |
6182 | emit_initial_value_sets (); | |
6183 | ||
6184 | /* And finally unshare all RTL. */ | |
6185 | unshare_all_rtl (); | |
6186 | ||
9f8628ba PB |
6187 | /* There's no need to defer outputting this function any more; we |
6188 | know we want to output it. */ | |
6189 | DECL_DEFER_OUTPUT (current_function_decl) = 0; | |
6190 | ||
6191 | /* Now that we're done expanding trees to RTL, we shouldn't have any | |
6192 | more CONCATs anywhere. */ | |
6193 | generating_concat_p = 0; | |
6194 | ||
b7211528 SB |
6195 | if (dump_file) |
6196 | { | |
6197 | fprintf (dump_file, | |
6198 | "\n\n;;\n;; Full RTL generated for this function:\n;;\n"); | |
6199 | /* And the pass manager will dump RTL for us. */ | |
6200 | } | |
ef330312 PB |
6201 | |
6202 | /* If we're emitting a nested function, make sure its parent gets | |
6203 | emitted as well. Doing otherwise confuses debug info. */ | |
be55bfe6 TS |
6204 | { |
6205 | tree parent; | |
6206 | for (parent = DECL_CONTEXT (current_function_decl); | |
6207 | parent != NULL_TREE; | |
6208 | parent = get_containing_scope (parent)) | |
6209 | if (TREE_CODE (parent) == FUNCTION_DECL) | |
6210 | TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (parent)) = 1; | |
6211 | } | |
c22cacf3 | 6212 | |
ef330312 PB |
6213 | /* We are now committed to emitting code for this function. Do any |
6214 | preparation, such as emitting abstract debug info for the inline | |
6215 | before it gets mangled by optimization. */ | |
6216 | if (cgraph_function_possibly_inlined_p (current_function_decl)) | |
6217 | (*debug_hooks->outlining_inline_function) (current_function_decl); | |
6218 | ||
6219 | TREE_ASM_WRITTEN (current_function_decl) = 1; | |
4bb1e037 AP |
6220 | |
6221 | /* After expanding, the return labels are no longer needed. */ | |
6222 | return_label = NULL; | |
6223 | naked_return_label = NULL; | |
0a35513e AH |
6224 | |
6225 | /* After expanding, the tm_restart map is no longer needed. */ | |
be55bfe6 | 6226 | if (fun->gimple_df->tm_restart) |
50979347 | 6227 | fun->gimple_df->tm_restart = NULL; |
0a35513e | 6228 | |
55e092c4 JH |
6229 | /* Tag the blocks with a depth number so that change_scope can find |
6230 | the common parent easily. */ | |
be55bfe6 | 6231 | set_block_levels (DECL_INITIAL (fun->decl), 0); |
bf08ebeb | 6232 | default_rtl_profile (); |
be147e84 | 6233 | |
f029db69 | 6234 | timevar_pop (TV_POST_EXPAND); |
be147e84 | 6235 | |
c2924966 | 6236 | return 0; |
242229bb JH |
6237 | } |
6238 | ||
27a4cd48 DM |
6239 | } // anon namespace |
6240 | ||
6241 | rtl_opt_pass * | |
6242 | make_pass_expand (gcc::context *ctxt) | |
6243 | { | |
6244 | return new pass_expand (ctxt); | |
6245 | } |