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242229bb | 1 | /* A pass for lowering trees to RTL. |
d1e082c2 | 2 | Copyright (C) 2004-2013 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 DN |
25 | #include "hard-reg-set.h" |
26 | #include "tree.h" | |
242229bb JH |
27 | #include "tm_p.h" |
28 | #include "basic-block.h" | |
29 | #include "function.h" | |
30 | #include "expr.h" | |
31 | #include "langhooks.h" | |
442b4905 AM |
32 | #include "bitmap.h" |
33 | #include "gimple.h" | |
5be5c238 AM |
34 | #include "gimple-iterator.h" |
35 | #include "gimple-walk.h" | |
442b4905 AM |
36 | #include "gimple-ssa.h" |
37 | #include "cgraph.h" | |
38 | #include "tree-cfg.h" | |
39 | #include "tree-phinodes.h" | |
40 | #include "ssa-iterators.h" | |
41 | #include "tree-ssanames.h" | |
42 | #include "tree-dfa.h" | |
7a300452 | 43 | #include "tree-ssa.h" |
242229bb JH |
44 | #include "tree-pass.h" |
45 | #include "except.h" | |
46 | #include "flags.h" | |
1f6d3a08 | 47 | #include "diagnostic.h" |
cf835838 | 48 | #include "gimple-pretty-print.h" |
1f6d3a08 | 49 | #include "toplev.h" |
ef330312 | 50 | #include "debug.h" |
7d69de61 | 51 | #include "params.h" |
ff28a94d | 52 | #include "tree-inline.h" |
6946b3f7 | 53 | #include "value-prof.h" |
e41b2a33 | 54 | #include "target.h" |
8e9055ae | 55 | #include "tree-ssa-live.h" |
78bca40d | 56 | #include "tree-outof-ssa.h" |
7a8cba34 | 57 | #include "sbitmap.h" |
7d776ee2 | 58 | #include "cfgloop.h" |
be147e84 | 59 | #include "regs.h" /* For reg_renumber. */ |
2b21299c | 60 | #include "insn-attr.h" /* For INSN_SCHEDULING. */ |
f3ddd692 | 61 | #include "asan.h" |
4484a35a | 62 | #include "tree-ssa-address.h" |
862d0b35 DN |
63 | #include "recog.h" |
64 | #include "output.h" | |
726a989a | 65 | |
8a6ce562 JBG |
66 | /* Some systems use __main in a way incompatible with its use in gcc, in these |
67 | cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to | |
68 | give the same symbol without quotes for an alternative entry point. You | |
69 | must define both, or neither. */ | |
70 | #ifndef NAME__MAIN | |
71 | #define NAME__MAIN "__main" | |
72 | #endif | |
73 | ||
4e3825db MM |
74 | /* This variable holds information helping the rewriting of SSA trees |
75 | into RTL. */ | |
76 | struct ssaexpand SA; | |
77 | ||
a5883ba0 MM |
78 | /* This variable holds the currently expanded gimple statement for purposes |
79 | of comminucating the profile info to the builtin expanders. */ | |
80 | gimple currently_expanding_gimple_stmt; | |
81 | ||
ddb555ed JJ |
82 | static rtx expand_debug_expr (tree); |
83 | ||
726a989a RB |
84 | /* Return an expression tree corresponding to the RHS of GIMPLE |
85 | statement STMT. */ | |
86 | ||
87 | tree | |
88 | gimple_assign_rhs_to_tree (gimple stmt) | |
89 | { | |
90 | tree t; | |
82d6e6fc | 91 | enum gimple_rhs_class grhs_class; |
b8698a0f | 92 | |
82d6e6fc | 93 | grhs_class = get_gimple_rhs_class (gimple_expr_code (stmt)); |
726a989a | 94 | |
0354c0c7 BS |
95 | if (grhs_class == GIMPLE_TERNARY_RHS) |
96 | t = build3 (gimple_assign_rhs_code (stmt), | |
97 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
98 | gimple_assign_rhs1 (stmt), | |
99 | gimple_assign_rhs2 (stmt), | |
100 | gimple_assign_rhs3 (stmt)); | |
101 | else if (grhs_class == GIMPLE_BINARY_RHS) | |
726a989a RB |
102 | t = build2 (gimple_assign_rhs_code (stmt), |
103 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
104 | gimple_assign_rhs1 (stmt), | |
105 | gimple_assign_rhs2 (stmt)); | |
82d6e6fc | 106 | else if (grhs_class == GIMPLE_UNARY_RHS) |
726a989a RB |
107 | t = build1 (gimple_assign_rhs_code (stmt), |
108 | TREE_TYPE (gimple_assign_lhs (stmt)), | |
109 | gimple_assign_rhs1 (stmt)); | |
82d6e6fc | 110 | else if (grhs_class == GIMPLE_SINGLE_RHS) |
b5b8b0ac AO |
111 | { |
112 | t = gimple_assign_rhs1 (stmt); | |
113 | /* Avoid modifying this tree in place below. */ | |
d0ed412a JJ |
114 | if ((gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (t) |
115 | && gimple_location (stmt) != EXPR_LOCATION (t)) | |
116 | || (gimple_block (stmt) | |
117 | && currently_expanding_to_rtl | |
5368224f | 118 | && EXPR_P (t))) |
b5b8b0ac AO |
119 | t = copy_node (t); |
120 | } | |
726a989a RB |
121 | else |
122 | gcc_unreachable (); | |
123 | ||
f5045c96 AM |
124 | if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (t)) |
125 | SET_EXPR_LOCATION (t, gimple_location (stmt)); | |
126 | ||
726a989a RB |
127 | return t; |
128 | } | |
129 | ||
726a989a | 130 | |
1f6d3a08 RH |
131 | #ifndef STACK_ALIGNMENT_NEEDED |
132 | #define STACK_ALIGNMENT_NEEDED 1 | |
133 | #endif | |
134 | ||
4e3825db MM |
135 | #define SSAVAR(x) (TREE_CODE (x) == SSA_NAME ? SSA_NAME_VAR (x) : x) |
136 | ||
137 | /* Associate declaration T with storage space X. If T is no | |
138 | SSA name this is exactly SET_DECL_RTL, otherwise make the | |
139 | partition of T associated with X. */ | |
140 | static inline void | |
141 | set_rtl (tree t, rtx x) | |
142 | { | |
143 | if (TREE_CODE (t) == SSA_NAME) | |
144 | { | |
145 | SA.partition_to_pseudo[var_to_partition (SA.map, t)] = x; | |
146 | if (x && !MEM_P (x)) | |
147 | set_reg_attrs_for_decl_rtl (SSA_NAME_VAR (t), x); | |
eb7adebc MM |
148 | /* For the benefit of debug information at -O0 (where vartracking |
149 | doesn't run) record the place also in the base DECL if it's | |
150 | a normal variable (not a parameter). */ | |
151 | if (x && x != pc_rtx && TREE_CODE (SSA_NAME_VAR (t)) == VAR_DECL) | |
152 | { | |
153 | tree var = SSA_NAME_VAR (t); | |
154 | /* If we don't yet have something recorded, just record it now. */ | |
155 | if (!DECL_RTL_SET_P (var)) | |
156 | SET_DECL_RTL (var, x); | |
47598145 | 157 | /* If we have it set already to "multiple places" don't |
eb7adebc MM |
158 | change this. */ |
159 | else if (DECL_RTL (var) == pc_rtx) | |
160 | ; | |
161 | /* If we have something recorded and it's not the same place | |
162 | as we want to record now, we have multiple partitions for the | |
163 | same base variable, with different places. We can't just | |
164 | randomly chose one, hence we have to say that we don't know. | |
165 | This only happens with optimization, and there var-tracking | |
166 | will figure out the right thing. */ | |
167 | else if (DECL_RTL (var) != x) | |
168 | SET_DECL_RTL (var, pc_rtx); | |
169 | } | |
4e3825db MM |
170 | } |
171 | else | |
172 | SET_DECL_RTL (t, x); | |
173 | } | |
1f6d3a08 RH |
174 | |
175 | /* This structure holds data relevant to one variable that will be | |
176 | placed in a stack slot. */ | |
177 | struct stack_var | |
178 | { | |
179 | /* The Variable. */ | |
180 | tree decl; | |
181 | ||
1f6d3a08 RH |
182 | /* Initially, the size of the variable. Later, the size of the partition, |
183 | if this variable becomes it's partition's representative. */ | |
184 | HOST_WIDE_INT size; | |
185 | ||
186 | /* The *byte* alignment required for this variable. Or as, with the | |
187 | size, the alignment for this partition. */ | |
188 | unsigned int alignb; | |
189 | ||
190 | /* The partition representative. */ | |
191 | size_t representative; | |
192 | ||
193 | /* The next stack variable in the partition, or EOC. */ | |
194 | size_t next; | |
2bdbbe94 MM |
195 | |
196 | /* The numbers of conflicting stack variables. */ | |
197 | bitmap conflicts; | |
1f6d3a08 RH |
198 | }; |
199 | ||
200 | #define EOC ((size_t)-1) | |
201 | ||
202 | /* We have an array of such objects while deciding allocation. */ | |
203 | static struct stack_var *stack_vars; | |
204 | static size_t stack_vars_alloc; | |
205 | static size_t stack_vars_num; | |
47598145 | 206 | static struct pointer_map_t *decl_to_stack_part; |
1f6d3a08 | 207 | |
3f9b14ff SB |
208 | /* Conflict bitmaps go on this obstack. This allows us to destroy |
209 | all of them in one big sweep. */ | |
210 | static bitmap_obstack stack_var_bitmap_obstack; | |
211 | ||
fa10beec | 212 | /* An array of indices such that stack_vars[stack_vars_sorted[i]].size |
1f6d3a08 RH |
213 | is non-decreasing. */ |
214 | static size_t *stack_vars_sorted; | |
215 | ||
1f6d3a08 RH |
216 | /* The phase of the stack frame. This is the known misalignment of |
217 | virtual_stack_vars_rtx from PREFERRED_STACK_BOUNDARY. That is, | |
218 | (frame_offset+frame_phase) % PREFERRED_STACK_BOUNDARY == 0. */ | |
219 | static int frame_phase; | |
220 | ||
7d69de61 RH |
221 | /* Used during expand_used_vars to remember if we saw any decls for |
222 | which we'd like to enable stack smashing protection. */ | |
223 | static bool has_protected_decls; | |
224 | ||
225 | /* Used during expand_used_vars. Remember if we say a character buffer | |
226 | smaller than our cutoff threshold. Used for -Wstack-protector. */ | |
227 | static bool has_short_buffer; | |
1f6d3a08 | 228 | |
6f197850 | 229 | /* Compute the byte alignment to use for DECL. Ignore alignment |
765c3e8f L |
230 | we can't do with expected alignment of the stack boundary. */ |
231 | ||
232 | static unsigned int | |
6f197850 | 233 | align_local_variable (tree decl) |
765c3e8f | 234 | { |
3a42502d | 235 | unsigned int align = LOCAL_DECL_ALIGNMENT (decl); |
6f197850 | 236 | DECL_ALIGN (decl) = align; |
1f6d3a08 RH |
237 | return align / BITS_PER_UNIT; |
238 | } | |
239 | ||
240 | /* Allocate SIZE bytes at byte alignment ALIGN from the stack frame. | |
241 | Return the frame offset. */ | |
242 | ||
243 | static HOST_WIDE_INT | |
3a42502d | 244 | alloc_stack_frame_space (HOST_WIDE_INT size, unsigned HOST_WIDE_INT align) |
1f6d3a08 RH |
245 | { |
246 | HOST_WIDE_INT offset, new_frame_offset; | |
247 | ||
248 | new_frame_offset = frame_offset; | |
249 | if (FRAME_GROWS_DOWNWARD) | |
250 | { | |
251 | new_frame_offset -= size + frame_phase; | |
252 | new_frame_offset &= -align; | |
253 | new_frame_offset += frame_phase; | |
254 | offset = new_frame_offset; | |
255 | } | |
256 | else | |
257 | { | |
258 | new_frame_offset -= frame_phase; | |
259 | new_frame_offset += align - 1; | |
260 | new_frame_offset &= -align; | |
261 | new_frame_offset += frame_phase; | |
262 | offset = new_frame_offset; | |
263 | new_frame_offset += size; | |
264 | } | |
265 | frame_offset = new_frame_offset; | |
266 | ||
9fb798d7 EB |
267 | if (frame_offset_overflow (frame_offset, cfun->decl)) |
268 | frame_offset = offset = 0; | |
269 | ||
1f6d3a08 RH |
270 | return offset; |
271 | } | |
272 | ||
273 | /* Accumulate DECL into STACK_VARS. */ | |
274 | ||
275 | static void | |
276 | add_stack_var (tree decl) | |
277 | { | |
533f611a RH |
278 | struct stack_var *v; |
279 | ||
1f6d3a08 RH |
280 | if (stack_vars_num >= stack_vars_alloc) |
281 | { | |
282 | if (stack_vars_alloc) | |
283 | stack_vars_alloc = stack_vars_alloc * 3 / 2; | |
284 | else | |
285 | stack_vars_alloc = 32; | |
286 | stack_vars | |
287 | = XRESIZEVEC (struct stack_var, stack_vars, stack_vars_alloc); | |
288 | } | |
47598145 MM |
289 | if (!decl_to_stack_part) |
290 | decl_to_stack_part = pointer_map_create (); | |
291 | ||
533f611a | 292 | v = &stack_vars[stack_vars_num]; |
47598145 | 293 | * (size_t *)pointer_map_insert (decl_to_stack_part, decl) = stack_vars_num; |
533f611a RH |
294 | |
295 | v->decl = decl; | |
533f611a RH |
296 | v->size = tree_low_cst (DECL_SIZE_UNIT (SSAVAR (decl)), 1); |
297 | /* Ensure that all variables have size, so that &a != &b for any two | |
298 | variables that are simultaneously live. */ | |
299 | if (v->size == 0) | |
300 | v->size = 1; | |
6f197850 | 301 | v->alignb = align_local_variable (SSAVAR (decl)); |
13868f40 EB |
302 | /* An alignment of zero can mightily confuse us later. */ |
303 | gcc_assert (v->alignb != 0); | |
1f6d3a08 RH |
304 | |
305 | /* All variables are initially in their own partition. */ | |
533f611a RH |
306 | v->representative = stack_vars_num; |
307 | v->next = EOC; | |
1f6d3a08 | 308 | |
2bdbbe94 | 309 | /* All variables initially conflict with no other. */ |
533f611a | 310 | v->conflicts = NULL; |
2bdbbe94 | 311 | |
1f6d3a08 | 312 | /* Ensure that this decl doesn't get put onto the list twice. */ |
4e3825db | 313 | set_rtl (decl, pc_rtx); |
1f6d3a08 RH |
314 | |
315 | stack_vars_num++; | |
316 | } | |
317 | ||
1f6d3a08 RH |
318 | /* Make the decls associated with luid's X and Y conflict. */ |
319 | ||
320 | static void | |
321 | add_stack_var_conflict (size_t x, size_t y) | |
322 | { | |
2bdbbe94 MM |
323 | struct stack_var *a = &stack_vars[x]; |
324 | struct stack_var *b = &stack_vars[y]; | |
325 | if (!a->conflicts) | |
3f9b14ff | 326 | a->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
2bdbbe94 | 327 | if (!b->conflicts) |
3f9b14ff | 328 | b->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
2bdbbe94 MM |
329 | bitmap_set_bit (a->conflicts, y); |
330 | bitmap_set_bit (b->conflicts, x); | |
1f6d3a08 RH |
331 | } |
332 | ||
333 | /* Check whether the decls associated with luid's X and Y conflict. */ | |
334 | ||
335 | static bool | |
336 | stack_var_conflict_p (size_t x, size_t y) | |
337 | { | |
2bdbbe94 MM |
338 | struct stack_var *a = &stack_vars[x]; |
339 | struct stack_var *b = &stack_vars[y]; | |
47598145 MM |
340 | if (x == y) |
341 | return false; | |
342 | /* Partitions containing an SSA name result from gimple registers | |
343 | with things like unsupported modes. They are top-level and | |
344 | hence conflict with everything else. */ | |
345 | if (TREE_CODE (a->decl) == SSA_NAME || TREE_CODE (b->decl) == SSA_NAME) | |
346 | return true; | |
347 | ||
2bdbbe94 MM |
348 | if (!a->conflicts || !b->conflicts) |
349 | return false; | |
350 | return bitmap_bit_p (a->conflicts, y); | |
1f6d3a08 | 351 | } |
b8698a0f | 352 | |
47598145 MM |
353 | /* Callback for walk_stmt_ops. If OP is a decl touched by add_stack_var |
354 | enter its partition number into bitmap DATA. */ | |
355 | ||
356 | static bool | |
357 | visit_op (gimple stmt ATTRIBUTE_UNUSED, tree op, void *data) | |
358 | { | |
359 | bitmap active = (bitmap)data; | |
360 | op = get_base_address (op); | |
361 | if (op | |
362 | && DECL_P (op) | |
363 | && DECL_RTL_IF_SET (op) == pc_rtx) | |
364 | { | |
365 | size_t *v = (size_t *) pointer_map_contains (decl_to_stack_part, op); | |
366 | if (v) | |
367 | bitmap_set_bit (active, *v); | |
368 | } | |
369 | return false; | |
370 | } | |
371 | ||
372 | /* Callback for walk_stmt_ops. If OP is a decl touched by add_stack_var | |
373 | record conflicts between it and all currently active other partitions | |
374 | from bitmap DATA. */ | |
375 | ||
376 | static bool | |
377 | visit_conflict (gimple stmt ATTRIBUTE_UNUSED, tree op, void *data) | |
378 | { | |
379 | bitmap active = (bitmap)data; | |
380 | op = get_base_address (op); | |
381 | if (op | |
382 | && DECL_P (op) | |
383 | && DECL_RTL_IF_SET (op) == pc_rtx) | |
384 | { | |
385 | size_t *v = | |
386 | (size_t *) pointer_map_contains (decl_to_stack_part, op); | |
387 | if (v && bitmap_set_bit (active, *v)) | |
388 | { | |
389 | size_t num = *v; | |
390 | bitmap_iterator bi; | |
391 | unsigned i; | |
392 | gcc_assert (num < stack_vars_num); | |
393 | EXECUTE_IF_SET_IN_BITMAP (active, 0, i, bi) | |
394 | add_stack_var_conflict (num, i); | |
395 | } | |
396 | } | |
397 | return false; | |
398 | } | |
399 | ||
400 | /* Helper routine for add_scope_conflicts, calculating the active partitions | |
401 | at the end of BB, leaving the result in WORK. We're called to generate | |
81bfd197 MM |
402 | conflicts when FOR_CONFLICT is true, otherwise we're just tracking |
403 | liveness. */ | |
47598145 MM |
404 | |
405 | static void | |
81bfd197 | 406 | add_scope_conflicts_1 (basic_block bb, bitmap work, bool for_conflict) |
47598145 MM |
407 | { |
408 | edge e; | |
409 | edge_iterator ei; | |
410 | gimple_stmt_iterator gsi; | |
411 | bool (*visit)(gimple, tree, void *); | |
412 | ||
413 | bitmap_clear (work); | |
414 | FOR_EACH_EDGE (e, ei, bb->preds) | |
415 | bitmap_ior_into (work, (bitmap)e->src->aux); | |
416 | ||
ea85edfe | 417 | visit = visit_op; |
47598145 MM |
418 | |
419 | for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
420 | { | |
421 | gimple stmt = gsi_stmt (gsi); | |
ea85edfe | 422 | walk_stmt_load_store_addr_ops (stmt, work, NULL, NULL, visit); |
47598145 | 423 | } |
ea85edfe | 424 | for (gsi = gsi_after_labels (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
47598145 MM |
425 | { |
426 | gimple stmt = gsi_stmt (gsi); | |
427 | ||
428 | if (gimple_clobber_p (stmt)) | |
429 | { | |
430 | tree lhs = gimple_assign_lhs (stmt); | |
431 | size_t *v; | |
432 | /* Nested function lowering might introduce LHSs | |
433 | that are COMPONENT_REFs. */ | |
434 | if (TREE_CODE (lhs) != VAR_DECL) | |
435 | continue; | |
436 | if (DECL_RTL_IF_SET (lhs) == pc_rtx | |
437 | && (v = (size_t *) | |
438 | pointer_map_contains (decl_to_stack_part, lhs))) | |
439 | bitmap_clear_bit (work, *v); | |
440 | } | |
441 | else if (!is_gimple_debug (stmt)) | |
ea85edfe | 442 | { |
81bfd197 | 443 | if (for_conflict |
ea85edfe JJ |
444 | && visit == visit_op) |
445 | { | |
446 | /* If this is the first real instruction in this BB we need | |
88d599dc MM |
447 | to add conflicts for everything live at this point now. |
448 | Unlike classical liveness for named objects we can't | |
ea85edfe JJ |
449 | rely on seeing a def/use of the names we're interested in. |
450 | There might merely be indirect loads/stores. We'd not add any | |
81bfd197 | 451 | conflicts for such partitions. */ |
ea85edfe JJ |
452 | bitmap_iterator bi; |
453 | unsigned i; | |
81bfd197 | 454 | EXECUTE_IF_SET_IN_BITMAP (work, 0, i, bi) |
ea85edfe | 455 | { |
9b44f5d9 MM |
456 | struct stack_var *a = &stack_vars[i]; |
457 | if (!a->conflicts) | |
3f9b14ff | 458 | a->conflicts = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
9b44f5d9 | 459 | bitmap_ior_into (a->conflicts, work); |
ea85edfe JJ |
460 | } |
461 | visit = visit_conflict; | |
462 | } | |
463 | walk_stmt_load_store_addr_ops (stmt, work, visit, visit, visit); | |
464 | } | |
47598145 MM |
465 | } |
466 | } | |
467 | ||
468 | /* Generate stack partition conflicts between all partitions that are | |
469 | simultaneously live. */ | |
470 | ||
471 | static void | |
472 | add_scope_conflicts (void) | |
473 | { | |
474 | basic_block bb; | |
475 | bool changed; | |
476 | bitmap work = BITMAP_ALLOC (NULL); | |
9b44f5d9 MM |
477 | int *rpo; |
478 | int n_bbs; | |
47598145 | 479 | |
88d599dc | 480 | /* We approximate the live range of a stack variable by taking the first |
47598145 MM |
481 | mention of its name as starting point(s), and by the end-of-scope |
482 | death clobber added by gimplify as ending point(s) of the range. | |
483 | This overapproximates in the case we for instance moved an address-taken | |
484 | operation upward, without also moving a dereference to it upwards. | |
485 | But it's conservatively correct as a variable never can hold values | |
486 | before its name is mentioned at least once. | |
487 | ||
88d599dc | 488 | We then do a mostly classical bitmap liveness algorithm. */ |
47598145 MM |
489 | |
490 | FOR_ALL_BB (bb) | |
3f9b14ff | 491 | bb->aux = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
47598145 | 492 | |
9b44f5d9 MM |
493 | rpo = XNEWVEC (int, last_basic_block); |
494 | n_bbs = pre_and_rev_post_order_compute (NULL, rpo, false); | |
495 | ||
47598145 MM |
496 | changed = true; |
497 | while (changed) | |
498 | { | |
9b44f5d9 | 499 | int i; |
47598145 | 500 | changed = false; |
9b44f5d9 | 501 | for (i = 0; i < n_bbs; i++) |
47598145 | 502 | { |
9b44f5d9 MM |
503 | bitmap active; |
504 | bb = BASIC_BLOCK (rpo[i]); | |
505 | active = (bitmap)bb->aux; | |
81bfd197 | 506 | add_scope_conflicts_1 (bb, work, false); |
47598145 MM |
507 | if (bitmap_ior_into (active, work)) |
508 | changed = true; | |
509 | } | |
510 | } | |
511 | ||
512 | FOR_EACH_BB (bb) | |
81bfd197 | 513 | add_scope_conflicts_1 (bb, work, true); |
47598145 | 514 | |
9b44f5d9 | 515 | free (rpo); |
47598145 MM |
516 | BITMAP_FREE (work); |
517 | FOR_ALL_BB (bb) | |
518 | BITMAP_FREE (bb->aux); | |
519 | } | |
520 | ||
1f6d3a08 | 521 | /* A subroutine of partition_stack_vars. A comparison function for qsort, |
3a42502d | 522 | sorting an array of indices by the properties of the object. */ |
1f6d3a08 RH |
523 | |
524 | static int | |
3a42502d | 525 | stack_var_cmp (const void *a, const void *b) |
1f6d3a08 | 526 | { |
3a42502d RH |
527 | size_t ia = *(const size_t *)a; |
528 | size_t ib = *(const size_t *)b; | |
529 | unsigned int aligna = stack_vars[ia].alignb; | |
530 | unsigned int alignb = stack_vars[ib].alignb; | |
531 | HOST_WIDE_INT sizea = stack_vars[ia].size; | |
532 | HOST_WIDE_INT sizeb = stack_vars[ib].size; | |
533 | tree decla = stack_vars[ia].decl; | |
534 | tree declb = stack_vars[ib].decl; | |
535 | bool largea, largeb; | |
4e3825db | 536 | unsigned int uida, uidb; |
1f6d3a08 | 537 | |
3a42502d RH |
538 | /* Primary compare on "large" alignment. Large comes first. */ |
539 | largea = (aligna * BITS_PER_UNIT > MAX_SUPPORTED_STACK_ALIGNMENT); | |
540 | largeb = (alignb * BITS_PER_UNIT > MAX_SUPPORTED_STACK_ALIGNMENT); | |
541 | if (largea != largeb) | |
542 | return (int)largeb - (int)largea; | |
543 | ||
544 | /* Secondary compare on size, decreasing */ | |
3a42502d | 545 | if (sizea > sizeb) |
6ddfda8a ER |
546 | return -1; |
547 | if (sizea < sizeb) | |
1f6d3a08 | 548 | return 1; |
3a42502d RH |
549 | |
550 | /* Tertiary compare on true alignment, decreasing. */ | |
551 | if (aligna < alignb) | |
552 | return -1; | |
553 | if (aligna > alignb) | |
554 | return 1; | |
555 | ||
556 | /* Final compare on ID for sort stability, increasing. | |
557 | Two SSA names are compared by their version, SSA names come before | |
558 | non-SSA names, and two normal decls are compared by their DECL_UID. */ | |
4e3825db MM |
559 | if (TREE_CODE (decla) == SSA_NAME) |
560 | { | |
561 | if (TREE_CODE (declb) == SSA_NAME) | |
562 | uida = SSA_NAME_VERSION (decla), uidb = SSA_NAME_VERSION (declb); | |
563 | else | |
564 | return -1; | |
565 | } | |
566 | else if (TREE_CODE (declb) == SSA_NAME) | |
567 | return 1; | |
568 | else | |
569 | uida = DECL_UID (decla), uidb = DECL_UID (declb); | |
79f802f5 | 570 | if (uida < uidb) |
79f802f5 | 571 | return 1; |
3a42502d RH |
572 | if (uida > uidb) |
573 | return -1; | |
1f6d3a08 RH |
574 | return 0; |
575 | } | |
576 | ||
55b34b5f RG |
577 | |
578 | /* If the points-to solution *PI points to variables that are in a partition | |
579 | together with other variables add all partition members to the pointed-to | |
580 | variables bitmap. */ | |
581 | ||
582 | static void | |
583 | add_partitioned_vars_to_ptset (struct pt_solution *pt, | |
584 | struct pointer_map_t *decls_to_partitions, | |
585 | struct pointer_set_t *visited, bitmap temp) | |
586 | { | |
587 | bitmap_iterator bi; | |
588 | unsigned i; | |
589 | bitmap *part; | |
590 | ||
591 | if (pt->anything | |
592 | || pt->vars == NULL | |
593 | /* The pointed-to vars bitmap is shared, it is enough to | |
594 | visit it once. */ | |
c3284718 | 595 | || pointer_set_insert (visited, pt->vars)) |
55b34b5f RG |
596 | return; |
597 | ||
598 | bitmap_clear (temp); | |
599 | ||
600 | /* By using a temporary bitmap to store all members of the partitions | |
601 | we have to add we make sure to visit each of the partitions only | |
602 | once. */ | |
603 | EXECUTE_IF_SET_IN_BITMAP (pt->vars, 0, i, bi) | |
604 | if ((!temp | |
605 | || !bitmap_bit_p (temp, i)) | |
606 | && (part = (bitmap *) pointer_map_contains (decls_to_partitions, | |
607 | (void *)(size_t) i))) | |
608 | bitmap_ior_into (temp, *part); | |
609 | if (!bitmap_empty_p (temp)) | |
610 | bitmap_ior_into (pt->vars, temp); | |
611 | } | |
612 | ||
613 | /* Update points-to sets based on partition info, so we can use them on RTL. | |
614 | The bitmaps representing stack partitions will be saved until expand, | |
615 | where partitioned decls used as bases in memory expressions will be | |
616 | rewritten. */ | |
617 | ||
618 | static void | |
619 | update_alias_info_with_stack_vars (void) | |
620 | { | |
621 | struct pointer_map_t *decls_to_partitions = NULL; | |
622 | size_t i, j; | |
623 | tree var = NULL_TREE; | |
624 | ||
625 | for (i = 0; i < stack_vars_num; i++) | |
626 | { | |
627 | bitmap part = NULL; | |
628 | tree name; | |
629 | struct ptr_info_def *pi; | |
630 | ||
631 | /* Not interested in partitions with single variable. */ | |
632 | if (stack_vars[i].representative != i | |
633 | || stack_vars[i].next == EOC) | |
634 | continue; | |
635 | ||
636 | if (!decls_to_partitions) | |
637 | { | |
638 | decls_to_partitions = pointer_map_create (); | |
639 | cfun->gimple_df->decls_to_pointers = pointer_map_create (); | |
640 | } | |
641 | ||
642 | /* Create an SSA_NAME that points to the partition for use | |
643 | as base during alias-oracle queries on RTL for bases that | |
644 | have been partitioned. */ | |
645 | if (var == NULL_TREE) | |
646 | var = create_tmp_var (ptr_type_node, NULL); | |
647 | name = make_ssa_name (var, NULL); | |
648 | ||
649 | /* Create bitmaps representing partitions. They will be used for | |
650 | points-to sets later, so use GGC alloc. */ | |
651 | part = BITMAP_GGC_ALLOC (); | |
652 | for (j = i; j != EOC; j = stack_vars[j].next) | |
653 | { | |
654 | tree decl = stack_vars[j].decl; | |
25a6a873 | 655 | unsigned int uid = DECL_PT_UID (decl); |
55b34b5f RG |
656 | bitmap_set_bit (part, uid); |
657 | *((bitmap *) pointer_map_insert (decls_to_partitions, | |
658 | (void *)(size_t) uid)) = part; | |
659 | *((tree *) pointer_map_insert (cfun->gimple_df->decls_to_pointers, | |
660 | decl)) = name; | |
88d8330d EB |
661 | if (TREE_ADDRESSABLE (decl)) |
662 | TREE_ADDRESSABLE (name) = 1; | |
55b34b5f RG |
663 | } |
664 | ||
665 | /* Make the SSA name point to all partition members. */ | |
666 | pi = get_ptr_info (name); | |
d3553615 | 667 | pt_solution_set (&pi->pt, part, false); |
55b34b5f RG |
668 | } |
669 | ||
670 | /* Make all points-to sets that contain one member of a partition | |
671 | contain all members of the partition. */ | |
672 | if (decls_to_partitions) | |
673 | { | |
674 | unsigned i; | |
675 | struct pointer_set_t *visited = pointer_set_create (); | |
3f9b14ff | 676 | bitmap temp = BITMAP_ALLOC (&stack_var_bitmap_obstack); |
55b34b5f RG |
677 | |
678 | for (i = 1; i < num_ssa_names; i++) | |
679 | { | |
680 | tree name = ssa_name (i); | |
681 | struct ptr_info_def *pi; | |
682 | ||
683 | if (name | |
684 | && POINTER_TYPE_P (TREE_TYPE (name)) | |
685 | && ((pi = SSA_NAME_PTR_INFO (name)) != NULL)) | |
686 | add_partitioned_vars_to_ptset (&pi->pt, decls_to_partitions, | |
687 | visited, temp); | |
688 | } | |
689 | ||
690 | add_partitioned_vars_to_ptset (&cfun->gimple_df->escaped, | |
691 | decls_to_partitions, visited, temp); | |
55b34b5f RG |
692 | |
693 | pointer_set_destroy (visited); | |
694 | pointer_map_destroy (decls_to_partitions); | |
695 | BITMAP_FREE (temp); | |
696 | } | |
697 | } | |
698 | ||
1f6d3a08 RH |
699 | /* A subroutine of partition_stack_vars. The UNION portion of a UNION/FIND |
700 | partitioning algorithm. Partitions A and B are known to be non-conflicting. | |
6ddfda8a | 701 | Merge them into a single partition A. */ |
1f6d3a08 RH |
702 | |
703 | static void | |
6ddfda8a | 704 | union_stack_vars (size_t a, size_t b) |
1f6d3a08 | 705 | { |
2bdbbe94 MM |
706 | struct stack_var *vb = &stack_vars[b]; |
707 | bitmap_iterator bi; | |
708 | unsigned u; | |
1f6d3a08 | 709 | |
6ddfda8a ER |
710 | gcc_assert (stack_vars[b].next == EOC); |
711 | /* Add B to A's partition. */ | |
712 | stack_vars[b].next = stack_vars[a].next; | |
713 | stack_vars[b].representative = a; | |
1f6d3a08 RH |
714 | stack_vars[a].next = b; |
715 | ||
716 | /* Update the required alignment of partition A to account for B. */ | |
717 | if (stack_vars[a].alignb < stack_vars[b].alignb) | |
718 | stack_vars[a].alignb = stack_vars[b].alignb; | |
719 | ||
720 | /* Update the interference graph and merge the conflicts. */ | |
2bdbbe94 MM |
721 | if (vb->conflicts) |
722 | { | |
723 | EXECUTE_IF_SET_IN_BITMAP (vb->conflicts, 0, u, bi) | |
724 | add_stack_var_conflict (a, stack_vars[u].representative); | |
725 | BITMAP_FREE (vb->conflicts); | |
726 | } | |
1f6d3a08 RH |
727 | } |
728 | ||
729 | /* A subroutine of expand_used_vars. Binpack the variables into | |
730 | partitions constrained by the interference graph. The overall | |
731 | algorithm used is as follows: | |
732 | ||
6ddfda8a | 733 | Sort the objects by size in descending order. |
1f6d3a08 RH |
734 | For each object A { |
735 | S = size(A) | |
736 | O = 0 | |
737 | loop { | |
738 | Look for the largest non-conflicting object B with size <= S. | |
739 | UNION (A, B) | |
1f6d3a08 RH |
740 | } |
741 | } | |
742 | */ | |
743 | ||
744 | static void | |
745 | partition_stack_vars (void) | |
746 | { | |
747 | size_t si, sj, n = stack_vars_num; | |
748 | ||
749 | stack_vars_sorted = XNEWVEC (size_t, stack_vars_num); | |
750 | for (si = 0; si < n; ++si) | |
751 | stack_vars_sorted[si] = si; | |
752 | ||
753 | if (n == 1) | |
754 | return; | |
755 | ||
3a42502d | 756 | qsort (stack_vars_sorted, n, sizeof (size_t), stack_var_cmp); |
1f6d3a08 | 757 | |
1f6d3a08 RH |
758 | for (si = 0; si < n; ++si) |
759 | { | |
760 | size_t i = stack_vars_sorted[si]; | |
3a42502d | 761 | unsigned int ialign = stack_vars[i].alignb; |
f3ddd692 | 762 | HOST_WIDE_INT isize = stack_vars[i].size; |
1f6d3a08 | 763 | |
6ddfda8a ER |
764 | /* Ignore objects that aren't partition representatives. If we |
765 | see a var that is not a partition representative, it must | |
766 | have been merged earlier. */ | |
767 | if (stack_vars[i].representative != i) | |
768 | continue; | |
769 | ||
770 | for (sj = si + 1; sj < n; ++sj) | |
1f6d3a08 RH |
771 | { |
772 | size_t j = stack_vars_sorted[sj]; | |
1f6d3a08 | 773 | unsigned int jalign = stack_vars[j].alignb; |
f3ddd692 | 774 | HOST_WIDE_INT jsize = stack_vars[j].size; |
1f6d3a08 RH |
775 | |
776 | /* Ignore objects that aren't partition representatives. */ | |
777 | if (stack_vars[j].representative != j) | |
778 | continue; | |
779 | ||
3a42502d RH |
780 | /* Do not mix objects of "small" (supported) alignment |
781 | and "large" (unsupported) alignment. */ | |
782 | if ((ialign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
783 | != (jalign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT)) | |
f3ddd692 JJ |
784 | break; |
785 | ||
786 | /* For Address Sanitizer do not mix objects with different | |
787 | sizes, as the shorter vars wouldn't be adequately protected. | |
788 | Don't do that for "large" (unsupported) alignment objects, | |
789 | those aren't protected anyway. */ | |
de5a5fa1 | 790 | if ((flag_sanitize & SANITIZE_ADDRESS) && isize != jsize |
f3ddd692 JJ |
791 | && ialign * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) |
792 | break; | |
793 | ||
794 | /* Ignore conflicting objects. */ | |
795 | if (stack_var_conflict_p (i, j)) | |
3a42502d RH |
796 | continue; |
797 | ||
1f6d3a08 | 798 | /* UNION the objects, placing J at OFFSET. */ |
6ddfda8a | 799 | union_stack_vars (i, j); |
1f6d3a08 RH |
800 | } |
801 | } | |
55b34b5f | 802 | |
9b999dc5 | 803 | update_alias_info_with_stack_vars (); |
1f6d3a08 RH |
804 | } |
805 | ||
806 | /* A debugging aid for expand_used_vars. Dump the generated partitions. */ | |
807 | ||
808 | static void | |
809 | dump_stack_var_partition (void) | |
810 | { | |
811 | size_t si, i, j, n = stack_vars_num; | |
812 | ||
813 | for (si = 0; si < n; ++si) | |
814 | { | |
815 | i = stack_vars_sorted[si]; | |
816 | ||
817 | /* Skip variables that aren't partition representatives, for now. */ | |
818 | if (stack_vars[i].representative != i) | |
819 | continue; | |
820 | ||
821 | fprintf (dump_file, "Partition %lu: size " HOST_WIDE_INT_PRINT_DEC | |
822 | " align %u\n", (unsigned long) i, stack_vars[i].size, | |
823 | stack_vars[i].alignb); | |
824 | ||
825 | for (j = i; j != EOC; j = stack_vars[j].next) | |
826 | { | |
827 | fputc ('\t', dump_file); | |
828 | print_generic_expr (dump_file, stack_vars[j].decl, dump_flags); | |
1f6d3a08 | 829 | } |
6ddfda8a | 830 | fputc ('\n', dump_file); |
1f6d3a08 RH |
831 | } |
832 | } | |
833 | ||
3a42502d | 834 | /* Assign rtl to DECL at BASE + OFFSET. */ |
1f6d3a08 RH |
835 | |
836 | static void | |
3a42502d RH |
837 | expand_one_stack_var_at (tree decl, rtx base, unsigned base_align, |
838 | HOST_WIDE_INT offset) | |
1f6d3a08 | 839 | { |
3a42502d | 840 | unsigned align; |
1f6d3a08 | 841 | rtx x; |
c22cacf3 | 842 | |
1f6d3a08 RH |
843 | /* If this fails, we've overflowed the stack frame. Error nicely? */ |
844 | gcc_assert (offset == trunc_int_for_mode (offset, Pmode)); | |
845 | ||
0a81f074 | 846 | x = plus_constant (Pmode, base, offset); |
4e3825db | 847 | x = gen_rtx_MEM (DECL_MODE (SSAVAR (decl)), x); |
1f6d3a08 | 848 | |
4e3825db MM |
849 | if (TREE_CODE (decl) != SSA_NAME) |
850 | { | |
851 | /* Set alignment we actually gave this decl if it isn't an SSA name. | |
852 | If it is we generate stack slots only accidentally so it isn't as | |
853 | important, we'll simply use the alignment that is already set. */ | |
3a42502d RH |
854 | if (base == virtual_stack_vars_rtx) |
855 | offset -= frame_phase; | |
4e3825db MM |
856 | align = offset & -offset; |
857 | align *= BITS_PER_UNIT; | |
3a42502d RH |
858 | if (align == 0 || align > base_align) |
859 | align = base_align; | |
860 | ||
861 | /* One would think that we could assert that we're not decreasing | |
862 | alignment here, but (at least) the i386 port does exactly this | |
863 | via the MINIMUM_ALIGNMENT hook. */ | |
4e3825db MM |
864 | |
865 | DECL_ALIGN (decl) = align; | |
866 | DECL_USER_ALIGN (decl) = 0; | |
867 | } | |
868 | ||
869 | set_mem_attributes (x, SSAVAR (decl), true); | |
870 | set_rtl (decl, x); | |
1f6d3a08 RH |
871 | } |
872 | ||
f3ddd692 JJ |
873 | struct stack_vars_data |
874 | { | |
875 | /* Vector of offset pairs, always end of some padding followed | |
876 | by start of the padding that needs Address Sanitizer protection. | |
877 | The vector is in reversed, highest offset pairs come first. */ | |
9771b263 | 878 | vec<HOST_WIDE_INT> asan_vec; |
f3ddd692 JJ |
879 | |
880 | /* Vector of partition representative decls in between the paddings. */ | |
9771b263 | 881 | vec<tree> asan_decl_vec; |
f3ddd692 JJ |
882 | }; |
883 | ||
1f6d3a08 RH |
884 | /* A subroutine of expand_used_vars. Give each partition representative |
885 | a unique location within the stack frame. Update each partition member | |
886 | with that location. */ | |
887 | ||
888 | static void | |
f3ddd692 | 889 | expand_stack_vars (bool (*pred) (size_t), struct stack_vars_data *data) |
1f6d3a08 RH |
890 | { |
891 | size_t si, i, j, n = stack_vars_num; | |
3a42502d RH |
892 | HOST_WIDE_INT large_size = 0, large_alloc = 0; |
893 | rtx large_base = NULL; | |
894 | unsigned large_align = 0; | |
895 | tree decl; | |
896 | ||
897 | /* Determine if there are any variables requiring "large" alignment. | |
898 | Since these are dynamically allocated, we only process these if | |
899 | no predicate involved. */ | |
900 | large_align = stack_vars[stack_vars_sorted[0]].alignb * BITS_PER_UNIT; | |
901 | if (pred == NULL && large_align > MAX_SUPPORTED_STACK_ALIGNMENT) | |
902 | { | |
903 | /* Find the total size of these variables. */ | |
904 | for (si = 0; si < n; ++si) | |
905 | { | |
906 | unsigned alignb; | |
907 | ||
908 | i = stack_vars_sorted[si]; | |
909 | alignb = stack_vars[i].alignb; | |
910 | ||
911 | /* Stop when we get to the first decl with "small" alignment. */ | |
912 | if (alignb * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
913 | break; | |
914 | ||
915 | /* Skip variables that aren't partition representatives. */ | |
916 | if (stack_vars[i].representative != i) | |
917 | continue; | |
918 | ||
919 | /* Skip variables that have already had rtl assigned. See also | |
920 | add_stack_var where we perpetrate this pc_rtx hack. */ | |
921 | decl = stack_vars[i].decl; | |
922 | if ((TREE_CODE (decl) == SSA_NAME | |
923 | ? SA.partition_to_pseudo[var_to_partition (SA.map, decl)] | |
924 | : DECL_RTL (decl)) != pc_rtx) | |
925 | continue; | |
926 | ||
927 | large_size += alignb - 1; | |
928 | large_size &= -(HOST_WIDE_INT)alignb; | |
929 | large_size += stack_vars[i].size; | |
930 | } | |
931 | ||
932 | /* If there were any, allocate space. */ | |
933 | if (large_size > 0) | |
934 | large_base = allocate_dynamic_stack_space (GEN_INT (large_size), 0, | |
935 | large_align, true); | |
936 | } | |
1f6d3a08 RH |
937 | |
938 | for (si = 0; si < n; ++si) | |
939 | { | |
3a42502d RH |
940 | rtx base; |
941 | unsigned base_align, alignb; | |
1f6d3a08 RH |
942 | HOST_WIDE_INT offset; |
943 | ||
944 | i = stack_vars_sorted[si]; | |
945 | ||
946 | /* Skip variables that aren't partition representatives, for now. */ | |
947 | if (stack_vars[i].representative != i) | |
948 | continue; | |
949 | ||
7d69de61 RH |
950 | /* Skip variables that have already had rtl assigned. See also |
951 | add_stack_var where we perpetrate this pc_rtx hack. */ | |
3a42502d RH |
952 | decl = stack_vars[i].decl; |
953 | if ((TREE_CODE (decl) == SSA_NAME | |
954 | ? SA.partition_to_pseudo[var_to_partition (SA.map, decl)] | |
955 | : DECL_RTL (decl)) != pc_rtx) | |
7d69de61 RH |
956 | continue; |
957 | ||
c22cacf3 | 958 | /* Check the predicate to see whether this variable should be |
7d69de61 | 959 | allocated in this pass. */ |
f3ddd692 | 960 | if (pred && !pred (i)) |
7d69de61 RH |
961 | continue; |
962 | ||
3a42502d RH |
963 | alignb = stack_vars[i].alignb; |
964 | if (alignb * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT) | |
965 | { | |
de5a5fa1 | 966 | if ((flag_sanitize & SANITIZE_ADDRESS) && pred) |
f3ddd692 JJ |
967 | { |
968 | HOST_WIDE_INT prev_offset = frame_offset; | |
969 | tree repr_decl = NULL_TREE; | |
970 | ||
971 | offset | |
972 | = alloc_stack_frame_space (stack_vars[i].size | |
973 | + ASAN_RED_ZONE_SIZE, | |
974 | MAX (alignb, ASAN_RED_ZONE_SIZE)); | |
9771b263 DN |
975 | data->asan_vec.safe_push (prev_offset); |
976 | data->asan_vec.safe_push (offset + stack_vars[i].size); | |
f3ddd692 JJ |
977 | /* Find best representative of the partition. |
978 | Prefer those with DECL_NAME, even better | |
979 | satisfying asan_protect_stack_decl predicate. */ | |
980 | for (j = i; j != EOC; j = stack_vars[j].next) | |
981 | if (asan_protect_stack_decl (stack_vars[j].decl) | |
982 | && DECL_NAME (stack_vars[j].decl)) | |
983 | { | |
984 | repr_decl = stack_vars[j].decl; | |
985 | break; | |
986 | } | |
987 | else if (repr_decl == NULL_TREE | |
988 | && DECL_P (stack_vars[j].decl) | |
989 | && DECL_NAME (stack_vars[j].decl)) | |
990 | repr_decl = stack_vars[j].decl; | |
991 | if (repr_decl == NULL_TREE) | |
992 | repr_decl = stack_vars[i].decl; | |
9771b263 | 993 | data->asan_decl_vec.safe_push (repr_decl); |
f3ddd692 JJ |
994 | } |
995 | else | |
996 | offset = alloc_stack_frame_space (stack_vars[i].size, alignb); | |
3a42502d RH |
997 | base = virtual_stack_vars_rtx; |
998 | base_align = crtl->max_used_stack_slot_alignment; | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | /* Large alignment is only processed in the last pass. */ | |
1003 | if (pred) | |
1004 | continue; | |
533f611a | 1005 | gcc_assert (large_base != NULL); |
3a42502d RH |
1006 | |
1007 | large_alloc += alignb - 1; | |
1008 | large_alloc &= -(HOST_WIDE_INT)alignb; | |
1009 | offset = large_alloc; | |
1010 | large_alloc += stack_vars[i].size; | |
1011 | ||
1012 | base = large_base; | |
1013 | base_align = large_align; | |
1014 | } | |
1f6d3a08 RH |
1015 | |
1016 | /* Create rtl for each variable based on their location within the | |
1017 | partition. */ | |
1018 | for (j = i; j != EOC; j = stack_vars[j].next) | |
f8da8190 | 1019 | { |
f8da8190 | 1020 | expand_one_stack_var_at (stack_vars[j].decl, |
3a42502d | 1021 | base, base_align, |
6ddfda8a | 1022 | offset); |
f8da8190 | 1023 | } |
1f6d3a08 | 1024 | } |
3a42502d RH |
1025 | |
1026 | gcc_assert (large_alloc == large_size); | |
1f6d3a08 RH |
1027 | } |
1028 | ||
ff28a94d JH |
1029 | /* Take into account all sizes of partitions and reset DECL_RTLs. */ |
1030 | static HOST_WIDE_INT | |
1031 | account_stack_vars (void) | |
1032 | { | |
1033 | size_t si, j, i, n = stack_vars_num; | |
1034 | HOST_WIDE_INT size = 0; | |
1035 | ||
1036 | for (si = 0; si < n; ++si) | |
1037 | { | |
1038 | i = stack_vars_sorted[si]; | |
1039 | ||
1040 | /* Skip variables that aren't partition representatives, for now. */ | |
1041 | if (stack_vars[i].representative != i) | |
1042 | continue; | |
1043 | ||
1044 | size += stack_vars[i].size; | |
1045 | for (j = i; j != EOC; j = stack_vars[j].next) | |
4e3825db | 1046 | set_rtl (stack_vars[j].decl, NULL); |
ff28a94d JH |
1047 | } |
1048 | return size; | |
1049 | } | |
1050 | ||
1f6d3a08 RH |
1051 | /* A subroutine of expand_one_var. Called to immediately assign rtl |
1052 | to a variable to be allocated in the stack frame. */ | |
1053 | ||
1054 | static void | |
1055 | expand_one_stack_var (tree var) | |
1056 | { | |
3a42502d RH |
1057 | HOST_WIDE_INT size, offset; |
1058 | unsigned byte_align; | |
1f6d3a08 | 1059 | |
4e3825db | 1060 | size = tree_low_cst (DECL_SIZE_UNIT (SSAVAR (var)), 1); |
6f197850 | 1061 | byte_align = align_local_variable (SSAVAR (var)); |
3a42502d RH |
1062 | |
1063 | /* We handle highly aligned variables in expand_stack_vars. */ | |
1064 | gcc_assert (byte_align * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT); | |
1f6d3a08 | 1065 | |
3a42502d RH |
1066 | offset = alloc_stack_frame_space (size, byte_align); |
1067 | ||
1068 | expand_one_stack_var_at (var, virtual_stack_vars_rtx, | |
1069 | crtl->max_used_stack_slot_alignment, offset); | |
1f6d3a08 RH |
1070 | } |
1071 | ||
1f6d3a08 RH |
1072 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL |
1073 | that will reside in a hard register. */ | |
1074 | ||
1075 | static void | |
1076 | expand_one_hard_reg_var (tree var) | |
1077 | { | |
1078 | rest_of_decl_compilation (var, 0, 0); | |
1079 | } | |
1080 | ||
1081 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL | |
1082 | that will reside in a pseudo register. */ | |
1083 | ||
1084 | static void | |
1085 | expand_one_register_var (tree var) | |
1086 | { | |
4e3825db MM |
1087 | tree decl = SSAVAR (var); |
1088 | tree type = TREE_TYPE (decl); | |
cde0f3fd | 1089 | enum machine_mode reg_mode = promote_decl_mode (decl, NULL); |
1f6d3a08 RH |
1090 | rtx x = gen_reg_rtx (reg_mode); |
1091 | ||
4e3825db | 1092 | set_rtl (var, x); |
1f6d3a08 RH |
1093 | |
1094 | /* Note if the object is a user variable. */ | |
4e3825db MM |
1095 | if (!DECL_ARTIFICIAL (decl)) |
1096 | mark_user_reg (x); | |
1f6d3a08 | 1097 | |
61021c2c | 1098 | if (POINTER_TYPE_P (type)) |
d466b407 | 1099 | mark_reg_pointer (x, get_pointer_alignment (var)); |
1f6d3a08 RH |
1100 | } |
1101 | ||
1102 | /* A subroutine of expand_one_var. Called to assign rtl to a VAR_DECL that | |
128a79fb | 1103 | has some associated error, e.g. its type is error-mark. We just need |
1f6d3a08 RH |
1104 | to pick something that won't crash the rest of the compiler. */ |
1105 | ||
1106 | static void | |
1107 | expand_one_error_var (tree var) | |
1108 | { | |
1109 | enum machine_mode mode = DECL_MODE (var); | |
1110 | rtx x; | |
1111 | ||
1112 | if (mode == BLKmode) | |
1113 | x = gen_rtx_MEM (BLKmode, const0_rtx); | |
1114 | else if (mode == VOIDmode) | |
1115 | x = const0_rtx; | |
1116 | else | |
1117 | x = gen_reg_rtx (mode); | |
1118 | ||
1119 | SET_DECL_RTL (var, x); | |
1120 | } | |
1121 | ||
c22cacf3 | 1122 | /* A subroutine of expand_one_var. VAR is a variable that will be |
1f6d3a08 RH |
1123 | allocated to the local stack frame. Return true if we wish to |
1124 | add VAR to STACK_VARS so that it will be coalesced with other | |
1125 | variables. Return false to allocate VAR immediately. | |
1126 | ||
1127 | This function is used to reduce the number of variables considered | |
1128 | for coalescing, which reduces the size of the quadratic problem. */ | |
1129 | ||
1130 | static bool | |
1131 | defer_stack_allocation (tree var, bool toplevel) | |
1132 | { | |
ee2e8462 EB |
1133 | /* Whether the variable is small enough for immediate allocation not to be |
1134 | a problem with regard to the frame size. */ | |
1135 | bool smallish | |
1136 | = (tree_low_cst (DECL_SIZE_UNIT (var), 1) | |
1137 | < PARAM_VALUE (PARAM_MIN_SIZE_FOR_STACK_SHARING)); | |
1138 | ||
7d69de61 | 1139 | /* If stack protection is enabled, *all* stack variables must be deferred, |
f3ddd692 JJ |
1140 | so that we can re-order the strings to the top of the frame. |
1141 | Similarly for Address Sanitizer. */ | |
de5a5fa1 | 1142 | if (flag_stack_protect || (flag_sanitize & SANITIZE_ADDRESS)) |
7d69de61 RH |
1143 | return true; |
1144 | ||
3a42502d RH |
1145 | /* We handle "large" alignment via dynamic allocation. We want to handle |
1146 | this extra complication in only one place, so defer them. */ | |
1147 | if (DECL_ALIGN (var) > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1148 | return true; | |
1149 | ||
ee2e8462 EB |
1150 | /* When optimization is enabled, DECL_IGNORED_P variables originally scoped |
1151 | might be detached from their block and appear at toplevel when we reach | |
1152 | here. We want to coalesce them with variables from other blocks when | |
1153 | the immediate contribution to the frame size would be noticeable. */ | |
1154 | if (toplevel && optimize > 0 && DECL_IGNORED_P (var) && !smallish) | |
1155 | return true; | |
1156 | ||
1157 | /* Variables declared in the outermost scope automatically conflict | |
1158 | with every other variable. The only reason to want to defer them | |
1f6d3a08 RH |
1159 | at all is that, after sorting, we can more efficiently pack |
1160 | small variables in the stack frame. Continue to defer at -O2. */ | |
1161 | if (toplevel && optimize < 2) | |
1162 | return false; | |
1163 | ||
1164 | /* Without optimization, *most* variables are allocated from the | |
1165 | stack, which makes the quadratic problem large exactly when we | |
c22cacf3 | 1166 | want compilation to proceed as quickly as possible. On the |
1f6d3a08 RH |
1167 | other hand, we don't want the function's stack frame size to |
1168 | get completely out of hand. So we avoid adding scalars and | |
1169 | "small" aggregates to the list at all. */ | |
ee2e8462 | 1170 | if (optimize == 0 && smallish) |
1f6d3a08 RH |
1171 | return false; |
1172 | ||
1173 | return true; | |
1174 | } | |
1175 | ||
1176 | /* A subroutine of expand_used_vars. Expand one variable according to | |
2a7e31df | 1177 | its flavor. Variables to be placed on the stack are not actually |
b8698a0f | 1178 | expanded yet, merely recorded. |
ff28a94d JH |
1179 | When REALLY_EXPAND is false, only add stack values to be allocated. |
1180 | Return stack usage this variable is supposed to take. | |
1181 | */ | |
1f6d3a08 | 1182 | |
ff28a94d JH |
1183 | static HOST_WIDE_INT |
1184 | expand_one_var (tree var, bool toplevel, bool really_expand) | |
1f6d3a08 | 1185 | { |
3a42502d | 1186 | unsigned int align = BITS_PER_UNIT; |
4e3825db | 1187 | tree origvar = var; |
3a42502d | 1188 | |
4e3825db MM |
1189 | var = SSAVAR (var); |
1190 | ||
3a42502d | 1191 | if (TREE_TYPE (var) != error_mark_node && TREE_CODE (var) == VAR_DECL) |
2e3f842f | 1192 | { |
2e3f842f L |
1193 | /* Because we don't know if VAR will be in register or on stack, |
1194 | we conservatively assume it will be on stack even if VAR is | |
1195 | eventually put into register after RA pass. For non-automatic | |
1196 | variables, which won't be on stack, we collect alignment of | |
1197 | type and ignore user specified alignment. */ | |
1198 | if (TREE_STATIC (var) || DECL_EXTERNAL (var)) | |
ae58e548 JJ |
1199 | align = MINIMUM_ALIGNMENT (TREE_TYPE (var), |
1200 | TYPE_MODE (TREE_TYPE (var)), | |
1201 | TYPE_ALIGN (TREE_TYPE (var))); | |
f3184b4c JJ |
1202 | else if (DECL_HAS_VALUE_EXPR_P (var) |
1203 | || (DECL_RTL_SET_P (var) && MEM_P (DECL_RTL (var)))) | |
1204 | /* Don't consider debug only variables with DECL_HAS_VALUE_EXPR_P set | |
1205 | or variables which were assigned a stack slot already by | |
1206 | expand_one_stack_var_at - in the latter case DECL_ALIGN has been | |
1207 | changed from the offset chosen to it. */ | |
1208 | align = crtl->stack_alignment_estimated; | |
2e3f842f | 1209 | else |
ae58e548 | 1210 | align = MINIMUM_ALIGNMENT (var, DECL_MODE (var), DECL_ALIGN (var)); |
2e3f842f | 1211 | |
3a42502d RH |
1212 | /* If the variable alignment is very large we'll dynamicaly allocate |
1213 | it, which means that in-frame portion is just a pointer. */ | |
1214 | if (align > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1215 | align = POINTER_SIZE; | |
1216 | } | |
1217 | ||
1218 | if (SUPPORTS_STACK_ALIGNMENT | |
1219 | && crtl->stack_alignment_estimated < align) | |
1220 | { | |
1221 | /* stack_alignment_estimated shouldn't change after stack | |
1222 | realign decision made */ | |
c3284718 | 1223 | gcc_assert (!crtl->stack_realign_processed); |
3a42502d | 1224 | crtl->stack_alignment_estimated = align; |
2e3f842f L |
1225 | } |
1226 | ||
3a42502d RH |
1227 | /* stack_alignment_needed > PREFERRED_STACK_BOUNDARY is permitted. |
1228 | So here we only make sure stack_alignment_needed >= align. */ | |
1229 | if (crtl->stack_alignment_needed < align) | |
1230 | crtl->stack_alignment_needed = align; | |
1231 | if (crtl->max_used_stack_slot_alignment < align) | |
1232 | crtl->max_used_stack_slot_alignment = align; | |
1233 | ||
4e3825db MM |
1234 | if (TREE_CODE (origvar) == SSA_NAME) |
1235 | { | |
1236 | gcc_assert (TREE_CODE (var) != VAR_DECL | |
1237 | || (!DECL_EXTERNAL (var) | |
1238 | && !DECL_HAS_VALUE_EXPR_P (var) | |
1239 | && !TREE_STATIC (var) | |
4e3825db MM |
1240 | && TREE_TYPE (var) != error_mark_node |
1241 | && !DECL_HARD_REGISTER (var) | |
1242 | && really_expand)); | |
1243 | } | |
1244 | if (TREE_CODE (var) != VAR_DECL && TREE_CODE (origvar) != SSA_NAME) | |
4846b435 | 1245 | ; |
1f6d3a08 RH |
1246 | else if (DECL_EXTERNAL (var)) |
1247 | ; | |
833b3afe | 1248 | else if (DECL_HAS_VALUE_EXPR_P (var)) |
1f6d3a08 RH |
1249 | ; |
1250 | else if (TREE_STATIC (var)) | |
7e8b322a | 1251 | ; |
eb7adebc | 1252 | else if (TREE_CODE (origvar) != SSA_NAME && DECL_RTL_SET_P (var)) |
1f6d3a08 RH |
1253 | ; |
1254 | else if (TREE_TYPE (var) == error_mark_node) | |
ff28a94d JH |
1255 | { |
1256 | if (really_expand) | |
1257 | expand_one_error_var (var); | |
1258 | } | |
4e3825db | 1259 | else if (TREE_CODE (var) == VAR_DECL && DECL_HARD_REGISTER (var)) |
ff28a94d JH |
1260 | { |
1261 | if (really_expand) | |
1262 | expand_one_hard_reg_var (var); | |
1263 | } | |
1f6d3a08 | 1264 | else if (use_register_for_decl (var)) |
ff28a94d JH |
1265 | { |
1266 | if (really_expand) | |
4e3825db | 1267 | expand_one_register_var (origvar); |
ff28a94d | 1268 | } |
56099f00 | 1269 | else if (! valid_constant_size_p (DECL_SIZE_UNIT (var))) |
7604eb4e | 1270 | { |
56099f00 | 1271 | /* Reject variables which cover more than half of the address-space. */ |
7604eb4e JJ |
1272 | if (really_expand) |
1273 | { | |
1274 | error ("size of variable %q+D is too large", var); | |
1275 | expand_one_error_var (var); | |
1276 | } | |
1277 | } | |
1f6d3a08 | 1278 | else if (defer_stack_allocation (var, toplevel)) |
4e3825db | 1279 | add_stack_var (origvar); |
1f6d3a08 | 1280 | else |
ff28a94d | 1281 | { |
bd9f1b4b | 1282 | if (really_expand) |
4e3825db | 1283 | expand_one_stack_var (origvar); |
ff28a94d JH |
1284 | return tree_low_cst (DECL_SIZE_UNIT (var), 1); |
1285 | } | |
1286 | return 0; | |
1f6d3a08 RH |
1287 | } |
1288 | ||
1289 | /* A subroutine of expand_used_vars. Walk down through the BLOCK tree | |
1290 | expanding variables. Those variables that can be put into registers | |
1291 | are allocated pseudos; those that can't are put on the stack. | |
1292 | ||
1293 | TOPLEVEL is true if this is the outermost BLOCK. */ | |
1294 | ||
1295 | static void | |
1296 | expand_used_vars_for_block (tree block, bool toplevel) | |
1297 | { | |
1f6d3a08 RH |
1298 | tree t; |
1299 | ||
1f6d3a08 | 1300 | /* Expand all variables at this level. */ |
910ad8de | 1301 | for (t = BLOCK_VARS (block); t ; t = DECL_CHAIN (t)) |
1ace6185 JJ |
1302 | if (TREE_USED (t) |
1303 | && ((TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != RESULT_DECL) | |
1304 | || !DECL_NONSHAREABLE (t))) | |
ff28a94d | 1305 | expand_one_var (t, toplevel, true); |
1f6d3a08 | 1306 | |
1f6d3a08 RH |
1307 | /* Expand all variables at containing levels. */ |
1308 | for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t)) | |
1309 | expand_used_vars_for_block (t, false); | |
1f6d3a08 RH |
1310 | } |
1311 | ||
1312 | /* A subroutine of expand_used_vars. Walk down through the BLOCK tree | |
1313 | and clear TREE_USED on all local variables. */ | |
1314 | ||
1315 | static void | |
1316 | clear_tree_used (tree block) | |
1317 | { | |
1318 | tree t; | |
1319 | ||
910ad8de | 1320 | for (t = BLOCK_VARS (block); t ; t = DECL_CHAIN (t)) |
1f6d3a08 | 1321 | /* if (!TREE_STATIC (t) && !DECL_EXTERNAL (t)) */ |
1ace6185 JJ |
1322 | if ((TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != RESULT_DECL) |
1323 | || !DECL_NONSHAREABLE (t)) | |
1f6d3a08 RH |
1324 | TREE_USED (t) = 0; |
1325 | ||
1326 | for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t)) | |
1327 | clear_tree_used (t); | |
1328 | } | |
1329 | ||
f6bc1c4a HS |
1330 | enum { |
1331 | SPCT_FLAG_DEFAULT = 1, | |
1332 | SPCT_FLAG_ALL = 2, | |
1333 | SPCT_FLAG_STRONG = 3 | |
1334 | }; | |
1335 | ||
7d69de61 RH |
1336 | /* Examine TYPE and determine a bit mask of the following features. */ |
1337 | ||
1338 | #define SPCT_HAS_LARGE_CHAR_ARRAY 1 | |
1339 | #define SPCT_HAS_SMALL_CHAR_ARRAY 2 | |
1340 | #define SPCT_HAS_ARRAY 4 | |
1341 | #define SPCT_HAS_AGGREGATE 8 | |
1342 | ||
1343 | static unsigned int | |
1344 | stack_protect_classify_type (tree type) | |
1345 | { | |
1346 | unsigned int ret = 0; | |
1347 | tree t; | |
1348 | ||
1349 | switch (TREE_CODE (type)) | |
1350 | { | |
1351 | case ARRAY_TYPE: | |
1352 | t = TYPE_MAIN_VARIANT (TREE_TYPE (type)); | |
1353 | if (t == char_type_node | |
1354 | || t == signed_char_type_node | |
1355 | || t == unsigned_char_type_node) | |
1356 | { | |
15362b89 JJ |
1357 | unsigned HOST_WIDE_INT max = PARAM_VALUE (PARAM_SSP_BUFFER_SIZE); |
1358 | unsigned HOST_WIDE_INT len; | |
7d69de61 | 1359 | |
15362b89 JJ |
1360 | if (!TYPE_SIZE_UNIT (type) |
1361 | || !host_integerp (TYPE_SIZE_UNIT (type), 1)) | |
1362 | len = max; | |
7d69de61 | 1363 | else |
15362b89 | 1364 | len = tree_low_cst (TYPE_SIZE_UNIT (type), 1); |
7d69de61 RH |
1365 | |
1366 | if (len < max) | |
1367 | ret = SPCT_HAS_SMALL_CHAR_ARRAY | SPCT_HAS_ARRAY; | |
1368 | else | |
1369 | ret = SPCT_HAS_LARGE_CHAR_ARRAY | SPCT_HAS_ARRAY; | |
1370 | } | |
1371 | else | |
1372 | ret = SPCT_HAS_ARRAY; | |
1373 | break; | |
1374 | ||
1375 | case UNION_TYPE: | |
1376 | case QUAL_UNION_TYPE: | |
1377 | case RECORD_TYPE: | |
1378 | ret = SPCT_HAS_AGGREGATE; | |
1379 | for (t = TYPE_FIELDS (type); t ; t = TREE_CHAIN (t)) | |
1380 | if (TREE_CODE (t) == FIELD_DECL) | |
1381 | ret |= stack_protect_classify_type (TREE_TYPE (t)); | |
1382 | break; | |
1383 | ||
1384 | default: | |
1385 | break; | |
1386 | } | |
1387 | ||
1388 | return ret; | |
1389 | } | |
1390 | ||
a4d05547 KH |
1391 | /* Return nonzero if DECL should be segregated into the "vulnerable" upper |
1392 | part of the local stack frame. Remember if we ever return nonzero for | |
7d69de61 RH |
1393 | any variable in this function. The return value is the phase number in |
1394 | which the variable should be allocated. */ | |
1395 | ||
1396 | static int | |
1397 | stack_protect_decl_phase (tree decl) | |
1398 | { | |
1399 | unsigned int bits = stack_protect_classify_type (TREE_TYPE (decl)); | |
1400 | int ret = 0; | |
1401 | ||
1402 | if (bits & SPCT_HAS_SMALL_CHAR_ARRAY) | |
1403 | has_short_buffer = true; | |
1404 | ||
f6bc1c4a HS |
1405 | if (flag_stack_protect == SPCT_FLAG_ALL |
1406 | || flag_stack_protect == SPCT_FLAG_STRONG) | |
7d69de61 RH |
1407 | { |
1408 | if ((bits & (SPCT_HAS_SMALL_CHAR_ARRAY | SPCT_HAS_LARGE_CHAR_ARRAY)) | |
1409 | && !(bits & SPCT_HAS_AGGREGATE)) | |
1410 | ret = 1; | |
1411 | else if (bits & SPCT_HAS_ARRAY) | |
1412 | ret = 2; | |
1413 | } | |
1414 | else | |
1415 | ret = (bits & SPCT_HAS_LARGE_CHAR_ARRAY) != 0; | |
1416 | ||
1417 | if (ret) | |
1418 | has_protected_decls = true; | |
1419 | ||
1420 | return ret; | |
1421 | } | |
1422 | ||
1423 | /* Two helper routines that check for phase 1 and phase 2. These are used | |
1424 | as callbacks for expand_stack_vars. */ | |
1425 | ||
1426 | static bool | |
f3ddd692 JJ |
1427 | stack_protect_decl_phase_1 (size_t i) |
1428 | { | |
1429 | return stack_protect_decl_phase (stack_vars[i].decl) == 1; | |
1430 | } | |
1431 | ||
1432 | static bool | |
1433 | stack_protect_decl_phase_2 (size_t i) | |
7d69de61 | 1434 | { |
f3ddd692 | 1435 | return stack_protect_decl_phase (stack_vars[i].decl) == 2; |
7d69de61 RH |
1436 | } |
1437 | ||
f3ddd692 JJ |
1438 | /* And helper function that checks for asan phase (with stack protector |
1439 | it is phase 3). This is used as callback for expand_stack_vars. | |
1440 | Returns true if any of the vars in the partition need to be protected. */ | |
1441 | ||
7d69de61 | 1442 | static bool |
f3ddd692 | 1443 | asan_decl_phase_3 (size_t i) |
7d69de61 | 1444 | { |
f3ddd692 JJ |
1445 | while (i != EOC) |
1446 | { | |
1447 | if (asan_protect_stack_decl (stack_vars[i].decl)) | |
1448 | return true; | |
1449 | i = stack_vars[i].next; | |
1450 | } | |
1451 | return false; | |
7d69de61 RH |
1452 | } |
1453 | ||
1454 | /* Ensure that variables in different stack protection phases conflict | |
1455 | so that they are not merged and share the same stack slot. */ | |
1456 | ||
1457 | static void | |
1458 | add_stack_protection_conflicts (void) | |
1459 | { | |
1460 | size_t i, j, n = stack_vars_num; | |
1461 | unsigned char *phase; | |
1462 | ||
1463 | phase = XNEWVEC (unsigned char, n); | |
1464 | for (i = 0; i < n; ++i) | |
1465 | phase[i] = stack_protect_decl_phase (stack_vars[i].decl); | |
1466 | ||
1467 | for (i = 0; i < n; ++i) | |
1468 | { | |
1469 | unsigned char ph_i = phase[i]; | |
9b44f5d9 | 1470 | for (j = i + 1; j < n; ++j) |
7d69de61 RH |
1471 | if (ph_i != phase[j]) |
1472 | add_stack_var_conflict (i, j); | |
1473 | } | |
1474 | ||
1475 | XDELETEVEC (phase); | |
1476 | } | |
1477 | ||
1478 | /* Create a decl for the guard at the top of the stack frame. */ | |
1479 | ||
1480 | static void | |
1481 | create_stack_guard (void) | |
1482 | { | |
c2255bc4 AH |
1483 | tree guard = build_decl (DECL_SOURCE_LOCATION (current_function_decl), |
1484 | VAR_DECL, NULL, ptr_type_node); | |
7d69de61 RH |
1485 | TREE_THIS_VOLATILE (guard) = 1; |
1486 | TREE_USED (guard) = 1; | |
1487 | expand_one_stack_var (guard); | |
cb91fab0 | 1488 | crtl->stack_protect_guard = guard; |
7d69de61 RH |
1489 | } |
1490 | ||
ff28a94d | 1491 | /* Prepare for expanding variables. */ |
b8698a0f | 1492 | static void |
ff28a94d JH |
1493 | init_vars_expansion (void) |
1494 | { | |
3f9b14ff SB |
1495 | /* Conflict bitmaps, and a few related temporary bitmaps, go here. */ |
1496 | bitmap_obstack_initialize (&stack_var_bitmap_obstack); | |
ff28a94d | 1497 | |
3f9b14ff SB |
1498 | /* A map from decl to stack partition. */ |
1499 | decl_to_stack_part = pointer_map_create (); | |
ff28a94d JH |
1500 | |
1501 | /* Initialize local stack smashing state. */ | |
1502 | has_protected_decls = false; | |
1503 | has_short_buffer = false; | |
1504 | } | |
1505 | ||
1506 | /* Free up stack variable graph data. */ | |
1507 | static void | |
1508 | fini_vars_expansion (void) | |
1509 | { | |
3f9b14ff SB |
1510 | bitmap_obstack_release (&stack_var_bitmap_obstack); |
1511 | if (stack_vars) | |
1512 | XDELETEVEC (stack_vars); | |
1513 | if (stack_vars_sorted) | |
1514 | XDELETEVEC (stack_vars_sorted); | |
ff28a94d | 1515 | stack_vars = NULL; |
9b44f5d9 | 1516 | stack_vars_sorted = NULL; |
ff28a94d | 1517 | stack_vars_alloc = stack_vars_num = 0; |
47598145 MM |
1518 | pointer_map_destroy (decl_to_stack_part); |
1519 | decl_to_stack_part = NULL; | |
ff28a94d JH |
1520 | } |
1521 | ||
30925d94 AO |
1522 | /* Make a fair guess for the size of the stack frame of the function |
1523 | in NODE. This doesn't have to be exact, the result is only used in | |
1524 | the inline heuristics. So we don't want to run the full stack var | |
1525 | packing algorithm (which is quadratic in the number of stack vars). | |
1526 | Instead, we calculate the total size of all stack vars. This turns | |
1527 | out to be a pretty fair estimate -- packing of stack vars doesn't | |
1528 | happen very often. */ | |
b5a430f3 | 1529 | |
ff28a94d | 1530 | HOST_WIDE_INT |
30925d94 | 1531 | estimated_stack_frame_size (struct cgraph_node *node) |
ff28a94d JH |
1532 | { |
1533 | HOST_WIDE_INT size = 0; | |
b5a430f3 | 1534 | size_t i; |
bb7e6d55 | 1535 | tree var; |
67348ccc | 1536 | struct function *fn = DECL_STRUCT_FUNCTION (node->decl); |
30925d94 | 1537 | |
bb7e6d55 | 1538 | push_cfun (fn); |
ff28a94d | 1539 | |
3f9b14ff SB |
1540 | init_vars_expansion (); |
1541 | ||
824f71b9 RG |
1542 | FOR_EACH_LOCAL_DECL (fn, i, var) |
1543 | if (auto_var_in_fn_p (var, fn->decl)) | |
1544 | size += expand_one_var (var, true, false); | |
b5a430f3 | 1545 | |
ff28a94d JH |
1546 | if (stack_vars_num > 0) |
1547 | { | |
b5a430f3 SB |
1548 | /* Fake sorting the stack vars for account_stack_vars (). */ |
1549 | stack_vars_sorted = XNEWVEC (size_t, stack_vars_num); | |
1550 | for (i = 0; i < stack_vars_num; ++i) | |
1551 | stack_vars_sorted[i] = i; | |
ff28a94d | 1552 | size += account_stack_vars (); |
ff28a94d | 1553 | } |
3f9b14ff SB |
1554 | |
1555 | fini_vars_expansion (); | |
2e1ec94f | 1556 | pop_cfun (); |
ff28a94d JH |
1557 | return size; |
1558 | } | |
1559 | ||
f6bc1c4a HS |
1560 | /* Helper routine to check if a record or union contains an array field. */ |
1561 | ||
1562 | static int | |
1563 | record_or_union_type_has_array_p (const_tree tree_type) | |
1564 | { | |
1565 | tree fields = TYPE_FIELDS (tree_type); | |
1566 | tree f; | |
1567 | ||
1568 | for (f = fields; f; f = DECL_CHAIN (f)) | |
1569 | if (TREE_CODE (f) == FIELD_DECL) | |
1570 | { | |
1571 | tree field_type = TREE_TYPE (f); | |
1572 | if (RECORD_OR_UNION_TYPE_P (field_type) | |
1573 | && record_or_union_type_has_array_p (field_type)) | |
1574 | return 1; | |
1575 | if (TREE_CODE (field_type) == ARRAY_TYPE) | |
1576 | return 1; | |
1577 | } | |
1578 | return 0; | |
1579 | } | |
1580 | ||
1f6d3a08 | 1581 | /* Expand all variables used in the function. */ |
727a31fa | 1582 | |
f3ddd692 | 1583 | static rtx |
727a31fa RH |
1584 | expand_used_vars (void) |
1585 | { | |
c021f10b | 1586 | tree var, outer_block = DECL_INITIAL (current_function_decl); |
6e1aa848 | 1587 | vec<tree> maybe_local_decls = vNULL; |
f3ddd692 | 1588 | rtx var_end_seq = NULL_RTX; |
70b5e7dc | 1589 | struct pointer_map_t *ssa_name_decls; |
4e3825db | 1590 | unsigned i; |
c021f10b | 1591 | unsigned len; |
f6bc1c4a | 1592 | bool gen_stack_protect_signal = false; |
727a31fa | 1593 | |
1f6d3a08 RH |
1594 | /* Compute the phase of the stack frame for this function. */ |
1595 | { | |
1596 | int align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT; | |
1597 | int off = STARTING_FRAME_OFFSET % align; | |
1598 | frame_phase = off ? align - off : 0; | |
1599 | } | |
727a31fa | 1600 | |
3f9b14ff SB |
1601 | /* Set TREE_USED on all variables in the local_decls. */ |
1602 | FOR_EACH_LOCAL_DECL (cfun, i, var) | |
1603 | TREE_USED (var) = 1; | |
1604 | /* Clear TREE_USED on all variables associated with a block scope. */ | |
1605 | clear_tree_used (DECL_INITIAL (current_function_decl)); | |
1606 | ||
ff28a94d | 1607 | init_vars_expansion (); |
7d69de61 | 1608 | |
70b5e7dc | 1609 | ssa_name_decls = pointer_map_create (); |
4e3825db MM |
1610 | for (i = 0; i < SA.map->num_partitions; i++) |
1611 | { | |
1612 | tree var = partition_to_var (SA.map, i); | |
1613 | ||
ea057359 | 1614 | gcc_assert (!virtual_operand_p (var)); |
70b5e7dc RG |
1615 | |
1616 | /* Assign decls to each SSA name partition, share decls for partitions | |
1617 | we could have coalesced (those with the same type). */ | |
1618 | if (SSA_NAME_VAR (var) == NULL_TREE) | |
1619 | { | |
1620 | void **slot = pointer_map_insert (ssa_name_decls, TREE_TYPE (var)); | |
1621 | if (!*slot) | |
1622 | *slot = (void *) create_tmp_reg (TREE_TYPE (var), NULL); | |
1623 | replace_ssa_name_symbol (var, (tree) *slot); | |
1624 | } | |
1625 | ||
cfb9edba EB |
1626 | /* Always allocate space for partitions based on VAR_DECLs. But for |
1627 | those based on PARM_DECLs or RESULT_DECLs and which matter for the | |
1628 | debug info, there is no need to do so if optimization is disabled | |
1629 | because all the SSA_NAMEs based on these DECLs have been coalesced | |
1630 | into a single partition, which is thus assigned the canonical RTL | |
1631 | location of the DECLs. */ | |
4e3825db MM |
1632 | if (TREE_CODE (SSA_NAME_VAR (var)) == VAR_DECL) |
1633 | expand_one_var (var, true, true); | |
cfb9edba | 1634 | else if (DECL_IGNORED_P (SSA_NAME_VAR (var)) || optimize) |
4e3825db MM |
1635 | { |
1636 | /* This is a PARM_DECL or RESULT_DECL. For those partitions that | |
1637 | contain the default def (representing the parm or result itself) | |
1638 | we don't do anything here. But those which don't contain the | |
1639 | default def (representing a temporary based on the parm/result) | |
1640 | we need to allocate space just like for normal VAR_DECLs. */ | |
1641 | if (!bitmap_bit_p (SA.partition_has_default_def, i)) | |
1642 | { | |
1643 | expand_one_var (var, true, true); | |
1644 | gcc_assert (SA.partition_to_pseudo[i]); | |
1645 | } | |
1646 | } | |
1647 | } | |
70b5e7dc | 1648 | pointer_map_destroy (ssa_name_decls); |
4e3825db | 1649 | |
f6bc1c4a HS |
1650 | if (flag_stack_protect == SPCT_FLAG_STRONG) |
1651 | FOR_EACH_LOCAL_DECL (cfun, i, var) | |
1652 | if (!is_global_var (var)) | |
1653 | { | |
1654 | tree var_type = TREE_TYPE (var); | |
1655 | /* Examine local referenced variables that have their addresses taken, | |
1656 | contain an array, or are arrays. */ | |
1657 | if (TREE_CODE (var) == VAR_DECL | |
1658 | && (TREE_CODE (var_type) == ARRAY_TYPE | |
1659 | || TREE_ADDRESSABLE (var) | |
1660 | || (RECORD_OR_UNION_TYPE_P (var_type) | |
1661 | && record_or_union_type_has_array_p (var_type)))) | |
1662 | { | |
1663 | gen_stack_protect_signal = true; | |
1664 | break; | |
1665 | } | |
1666 | } | |
1667 | ||
cb91fab0 | 1668 | /* At this point all variables on the local_decls with TREE_USED |
1f6d3a08 | 1669 | set are not associated with any block scope. Lay them out. */ |
c021f10b | 1670 | |
9771b263 | 1671 | len = vec_safe_length (cfun->local_decls); |
c021f10b | 1672 | FOR_EACH_LOCAL_DECL (cfun, i, var) |
1f6d3a08 | 1673 | { |
1f6d3a08 RH |
1674 | bool expand_now = false; |
1675 | ||
4e3825db MM |
1676 | /* Expanded above already. */ |
1677 | if (is_gimple_reg (var)) | |
eb7adebc MM |
1678 | { |
1679 | TREE_USED (var) = 0; | |
3adcf52c | 1680 | goto next; |
eb7adebc | 1681 | } |
1f6d3a08 RH |
1682 | /* We didn't set a block for static or extern because it's hard |
1683 | to tell the difference between a global variable (re)declared | |
1684 | in a local scope, and one that's really declared there to | |
1685 | begin with. And it doesn't really matter much, since we're | |
1686 | not giving them stack space. Expand them now. */ | |
4e3825db | 1687 | else if (TREE_STATIC (var) || DECL_EXTERNAL (var)) |
1f6d3a08 RH |
1688 | expand_now = true; |
1689 | ||
ee2e8462 EB |
1690 | /* Expand variables not associated with any block now. Those created by |
1691 | the optimizers could be live anywhere in the function. Those that | |
1692 | could possibly have been scoped originally and detached from their | |
1693 | block will have their allocation deferred so we coalesce them with | |
1694 | others when optimization is enabled. */ | |
1f6d3a08 RH |
1695 | else if (TREE_USED (var)) |
1696 | expand_now = true; | |
1697 | ||
1698 | /* Finally, mark all variables on the list as used. We'll use | |
1699 | this in a moment when we expand those associated with scopes. */ | |
1700 | TREE_USED (var) = 1; | |
1701 | ||
1702 | if (expand_now) | |
3adcf52c JM |
1703 | expand_one_var (var, true, true); |
1704 | ||
1705 | next: | |
1706 | if (DECL_ARTIFICIAL (var) && !DECL_IGNORED_P (var)) | |
802e9f8e | 1707 | { |
3adcf52c JM |
1708 | rtx rtl = DECL_RTL_IF_SET (var); |
1709 | ||
1710 | /* Keep artificial non-ignored vars in cfun->local_decls | |
1711 | chain until instantiate_decls. */ | |
1712 | if (rtl && (MEM_P (rtl) || GET_CODE (rtl) == CONCAT)) | |
c021f10b | 1713 | add_local_decl (cfun, var); |
6c6366f6 | 1714 | else if (rtl == NULL_RTX) |
c021f10b NF |
1715 | /* If rtl isn't set yet, which can happen e.g. with |
1716 | -fstack-protector, retry before returning from this | |
1717 | function. */ | |
9771b263 | 1718 | maybe_local_decls.safe_push (var); |
802e9f8e | 1719 | } |
1f6d3a08 | 1720 | } |
1f6d3a08 | 1721 | |
c021f10b NF |
1722 | /* We duplicated some of the decls in CFUN->LOCAL_DECLS. |
1723 | ||
1724 | +-----------------+-----------------+ | |
1725 | | ...processed... | ...duplicates...| | |
1726 | +-----------------+-----------------+ | |
1727 | ^ | |
1728 | +-- LEN points here. | |
1729 | ||
1730 | We just want the duplicates, as those are the artificial | |
1731 | non-ignored vars that we want to keep until instantiate_decls. | |
1732 | Move them down and truncate the array. */ | |
9771b263 DN |
1733 | if (!vec_safe_is_empty (cfun->local_decls)) |
1734 | cfun->local_decls->block_remove (0, len); | |
c021f10b | 1735 | |
1f6d3a08 RH |
1736 | /* At this point, all variables within the block tree with TREE_USED |
1737 | set are actually used by the optimized function. Lay them out. */ | |
1738 | expand_used_vars_for_block (outer_block, true); | |
1739 | ||
1740 | if (stack_vars_num > 0) | |
1741 | { | |
47598145 | 1742 | add_scope_conflicts (); |
1f6d3a08 | 1743 | |
c22cacf3 | 1744 | /* If stack protection is enabled, we don't share space between |
7d69de61 RH |
1745 | vulnerable data and non-vulnerable data. */ |
1746 | if (flag_stack_protect) | |
1747 | add_stack_protection_conflicts (); | |
1748 | ||
c22cacf3 | 1749 | /* Now that we have collected all stack variables, and have computed a |
1f6d3a08 RH |
1750 | minimal interference graph, attempt to save some stack space. */ |
1751 | partition_stack_vars (); | |
1752 | if (dump_file) | |
1753 | dump_stack_var_partition (); | |
7d69de61 RH |
1754 | } |
1755 | ||
f6bc1c4a HS |
1756 | switch (flag_stack_protect) |
1757 | { | |
1758 | case SPCT_FLAG_ALL: | |
1759 | create_stack_guard (); | |
1760 | break; | |
1761 | ||
1762 | case SPCT_FLAG_STRONG: | |
1763 | if (gen_stack_protect_signal | |
1764 | || cfun->calls_alloca || has_protected_decls) | |
1765 | create_stack_guard (); | |
1766 | break; | |
1767 | ||
1768 | case SPCT_FLAG_DEFAULT: | |
1769 | if (cfun->calls_alloca || has_protected_decls) | |
c3284718 | 1770 | create_stack_guard (); |
f6bc1c4a HS |
1771 | break; |
1772 | ||
1773 | default: | |
1774 | ; | |
1775 | } | |
1f6d3a08 | 1776 | |
7d69de61 RH |
1777 | /* Assign rtl to each variable based on these partitions. */ |
1778 | if (stack_vars_num > 0) | |
1779 | { | |
f3ddd692 JJ |
1780 | struct stack_vars_data data; |
1781 | ||
6e1aa848 DN |
1782 | data.asan_vec = vNULL; |
1783 | data.asan_decl_vec = vNULL; | |
f3ddd692 | 1784 | |
7d69de61 RH |
1785 | /* Reorder decls to be protected by iterating over the variables |
1786 | array multiple times, and allocating out of each phase in turn. */ | |
c22cacf3 | 1787 | /* ??? We could probably integrate this into the qsort we did |
7d69de61 RH |
1788 | earlier, such that we naturally see these variables first, |
1789 | and thus naturally allocate things in the right order. */ | |
1790 | if (has_protected_decls) | |
1791 | { | |
1792 | /* Phase 1 contains only character arrays. */ | |
f3ddd692 | 1793 | expand_stack_vars (stack_protect_decl_phase_1, &data); |
7d69de61 RH |
1794 | |
1795 | /* Phase 2 contains other kinds of arrays. */ | |
1796 | if (flag_stack_protect == 2) | |
f3ddd692 | 1797 | expand_stack_vars (stack_protect_decl_phase_2, &data); |
7d69de61 RH |
1798 | } |
1799 | ||
de5a5fa1 | 1800 | if (flag_sanitize & SANITIZE_ADDRESS) |
f3ddd692 JJ |
1801 | /* Phase 3, any partitions that need asan protection |
1802 | in addition to phase 1 and 2. */ | |
1803 | expand_stack_vars (asan_decl_phase_3, &data); | |
1804 | ||
9771b263 | 1805 | if (!data.asan_vec.is_empty ()) |
f3ddd692 JJ |
1806 | { |
1807 | HOST_WIDE_INT prev_offset = frame_offset; | |
1808 | HOST_WIDE_INT offset | |
1809 | = alloc_stack_frame_space (ASAN_RED_ZONE_SIZE, | |
1810 | ASAN_RED_ZONE_SIZE); | |
9771b263 DN |
1811 | data.asan_vec.safe_push (prev_offset); |
1812 | data.asan_vec.safe_push (offset); | |
f3ddd692 JJ |
1813 | |
1814 | var_end_seq | |
1815 | = asan_emit_stack_protection (virtual_stack_vars_rtx, | |
9771b263 | 1816 | data.asan_vec.address (), |
c3284718 | 1817 | data.asan_decl_vec. address (), |
9771b263 | 1818 | data.asan_vec.length ()); |
f3ddd692 JJ |
1819 | } |
1820 | ||
1821 | expand_stack_vars (NULL, &data); | |
1822 | ||
9771b263 DN |
1823 | data.asan_vec.release (); |
1824 | data.asan_decl_vec.release (); | |
1f6d3a08 RH |
1825 | } |
1826 | ||
3f9b14ff SB |
1827 | fini_vars_expansion (); |
1828 | ||
6c6366f6 JJ |
1829 | /* If there were any artificial non-ignored vars without rtl |
1830 | found earlier, see if deferred stack allocation hasn't assigned | |
1831 | rtl to them. */ | |
9771b263 | 1832 | FOR_EACH_VEC_ELT_REVERSE (maybe_local_decls, i, var) |
6c6366f6 | 1833 | { |
6c6366f6 JJ |
1834 | rtx rtl = DECL_RTL_IF_SET (var); |
1835 | ||
6c6366f6 JJ |
1836 | /* Keep artificial non-ignored vars in cfun->local_decls |
1837 | chain until instantiate_decls. */ | |
1838 | if (rtl && (MEM_P (rtl) || GET_CODE (rtl) == CONCAT)) | |
c021f10b | 1839 | add_local_decl (cfun, var); |
6c6366f6 | 1840 | } |
9771b263 | 1841 | maybe_local_decls.release (); |
6c6366f6 | 1842 | |
1f6d3a08 RH |
1843 | /* If the target requires that FRAME_OFFSET be aligned, do it. */ |
1844 | if (STACK_ALIGNMENT_NEEDED) | |
1845 | { | |
1846 | HOST_WIDE_INT align = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT; | |
1847 | if (!FRAME_GROWS_DOWNWARD) | |
1848 | frame_offset += align - 1; | |
1849 | frame_offset &= -align; | |
1850 | } | |
f3ddd692 JJ |
1851 | |
1852 | return var_end_seq; | |
727a31fa RH |
1853 | } |
1854 | ||
1855 | ||
b7211528 SB |
1856 | /* If we need to produce a detailed dump, print the tree representation |
1857 | for STMT to the dump file. SINCE is the last RTX after which the RTL | |
1858 | generated for STMT should have been appended. */ | |
1859 | ||
1860 | static void | |
726a989a | 1861 | maybe_dump_rtl_for_gimple_stmt (gimple stmt, rtx since) |
b7211528 SB |
1862 | { |
1863 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
1864 | { | |
1865 | fprintf (dump_file, "\n;; "); | |
b5b8b0ac AO |
1866 | print_gimple_stmt (dump_file, stmt, 0, |
1867 | TDF_SLIM | (dump_flags & TDF_LINENO)); | |
b7211528 SB |
1868 | fprintf (dump_file, "\n"); |
1869 | ||
1870 | print_rtl (dump_file, since ? NEXT_INSN (since) : since); | |
1871 | } | |
1872 | } | |
1873 | ||
8b11009b ZD |
1874 | /* Maps the blocks that do not contain tree labels to rtx labels. */ |
1875 | ||
1876 | static struct pointer_map_t *lab_rtx_for_bb; | |
1877 | ||
a9b77cd1 ZD |
1878 | /* Returns the label_rtx expression for a label starting basic block BB. */ |
1879 | ||
1880 | static rtx | |
726a989a | 1881 | label_rtx_for_bb (basic_block bb ATTRIBUTE_UNUSED) |
a9b77cd1 | 1882 | { |
726a989a RB |
1883 | gimple_stmt_iterator gsi; |
1884 | tree lab; | |
1885 | gimple lab_stmt; | |
8b11009b | 1886 | void **elt; |
a9b77cd1 ZD |
1887 | |
1888 | if (bb->flags & BB_RTL) | |
1889 | return block_label (bb); | |
1890 | ||
8b11009b ZD |
1891 | elt = pointer_map_contains (lab_rtx_for_bb, bb); |
1892 | if (elt) | |
ae50c0cb | 1893 | return (rtx) *elt; |
8b11009b ZD |
1894 | |
1895 | /* Find the tree label if it is present. */ | |
b8698a0f | 1896 | |
726a989a | 1897 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
a9b77cd1 | 1898 | { |
726a989a RB |
1899 | lab_stmt = gsi_stmt (gsi); |
1900 | if (gimple_code (lab_stmt) != GIMPLE_LABEL) | |
a9b77cd1 ZD |
1901 | break; |
1902 | ||
726a989a | 1903 | lab = gimple_label_label (lab_stmt); |
a9b77cd1 ZD |
1904 | if (DECL_NONLOCAL (lab)) |
1905 | break; | |
1906 | ||
1907 | return label_rtx (lab); | |
1908 | } | |
1909 | ||
8b11009b ZD |
1910 | elt = pointer_map_insert (lab_rtx_for_bb, bb); |
1911 | *elt = gen_label_rtx (); | |
ae50c0cb | 1912 | return (rtx) *elt; |
a9b77cd1 ZD |
1913 | } |
1914 | ||
726a989a | 1915 | |
529ff441 MM |
1916 | /* A subroutine of expand_gimple_cond. Given E, a fallthrough edge |
1917 | of a basic block where we just expanded the conditional at the end, | |
315adeda MM |
1918 | possibly clean up the CFG and instruction sequence. LAST is the |
1919 | last instruction before the just emitted jump sequence. */ | |
529ff441 MM |
1920 | |
1921 | static void | |
315adeda | 1922 | maybe_cleanup_end_of_block (edge e, rtx last) |
529ff441 MM |
1923 | { |
1924 | /* Special case: when jumpif decides that the condition is | |
1925 | trivial it emits an unconditional jump (and the necessary | |
1926 | barrier). But we still have two edges, the fallthru one is | |
1927 | wrong. purge_dead_edges would clean this up later. Unfortunately | |
1928 | we have to insert insns (and split edges) before | |
1929 | find_many_sub_basic_blocks and hence before purge_dead_edges. | |
1930 | But splitting edges might create new blocks which depend on the | |
1931 | fact that if there are two edges there's no barrier. So the | |
1932 | barrier would get lost and verify_flow_info would ICE. Instead | |
1933 | of auditing all edge splitters to care for the barrier (which | |
1934 | normally isn't there in a cleaned CFG), fix it here. */ | |
1935 | if (BARRIER_P (get_last_insn ())) | |
1936 | { | |
529ff441 MM |
1937 | rtx insn; |
1938 | remove_edge (e); | |
1939 | /* Now, we have a single successor block, if we have insns to | |
1940 | insert on the remaining edge we potentially will insert | |
1941 | it at the end of this block (if the dest block isn't feasible) | |
1942 | in order to avoid splitting the edge. This insertion will take | |
1943 | place in front of the last jump. But we might have emitted | |
1944 | multiple jumps (conditional and one unconditional) to the | |
1945 | same destination. Inserting in front of the last one then | |
1946 | is a problem. See PR 40021. We fix this by deleting all | |
1947 | jumps except the last unconditional one. */ | |
1948 | insn = PREV_INSN (get_last_insn ()); | |
1949 | /* Make sure we have an unconditional jump. Otherwise we're | |
1950 | confused. */ | |
1951 | gcc_assert (JUMP_P (insn) && !any_condjump_p (insn)); | |
315adeda | 1952 | for (insn = PREV_INSN (insn); insn != last;) |
529ff441 MM |
1953 | { |
1954 | insn = PREV_INSN (insn); | |
1955 | if (JUMP_P (NEXT_INSN (insn))) | |
90eb3e33 | 1956 | { |
8a269cb7 | 1957 | if (!any_condjump_p (NEXT_INSN (insn))) |
90eb3e33 JJ |
1958 | { |
1959 | gcc_assert (BARRIER_P (NEXT_INSN (NEXT_INSN (insn)))); | |
1960 | delete_insn (NEXT_INSN (NEXT_INSN (insn))); | |
1961 | } | |
1962 | delete_insn (NEXT_INSN (insn)); | |
1963 | } | |
529ff441 MM |
1964 | } |
1965 | } | |
1966 | } | |
1967 | ||
726a989a | 1968 | /* A subroutine of expand_gimple_basic_block. Expand one GIMPLE_COND. |
80c7a9eb RH |
1969 | Returns a new basic block if we've terminated the current basic |
1970 | block and created a new one. */ | |
1971 | ||
1972 | static basic_block | |
726a989a | 1973 | expand_gimple_cond (basic_block bb, gimple stmt) |
80c7a9eb RH |
1974 | { |
1975 | basic_block new_bb, dest; | |
1976 | edge new_edge; | |
1977 | edge true_edge; | |
1978 | edge false_edge; | |
b7211528 | 1979 | rtx last2, last; |
28ed065e MM |
1980 | enum tree_code code; |
1981 | tree op0, op1; | |
1982 | ||
1983 | code = gimple_cond_code (stmt); | |
1984 | op0 = gimple_cond_lhs (stmt); | |
1985 | op1 = gimple_cond_rhs (stmt); | |
1986 | /* We're sometimes presented with such code: | |
1987 | D.123_1 = x < y; | |
1988 | if (D.123_1 != 0) | |
1989 | ... | |
1990 | This would expand to two comparisons which then later might | |
1991 | be cleaned up by combine. But some pattern matchers like if-conversion | |
1992 | work better when there's only one compare, so make up for this | |
1993 | here as special exception if TER would have made the same change. */ | |
31348d52 | 1994 | if (SA.values |
28ed065e | 1995 | && TREE_CODE (op0) == SSA_NAME |
31348d52 RB |
1996 | && TREE_CODE (TREE_TYPE (op0)) == BOOLEAN_TYPE |
1997 | && TREE_CODE (op1) == INTEGER_CST | |
1998 | && ((gimple_cond_code (stmt) == NE_EXPR | |
1999 | && integer_zerop (op1)) | |
2000 | || (gimple_cond_code (stmt) == EQ_EXPR | |
2001 | && integer_onep (op1))) | |
28ed065e MM |
2002 | && bitmap_bit_p (SA.values, SSA_NAME_VERSION (op0))) |
2003 | { | |
2004 | gimple second = SSA_NAME_DEF_STMT (op0); | |
e83f4b68 | 2005 | if (gimple_code (second) == GIMPLE_ASSIGN) |
28ed065e | 2006 | { |
e83f4b68 MM |
2007 | enum tree_code code2 = gimple_assign_rhs_code (second); |
2008 | if (TREE_CODE_CLASS (code2) == tcc_comparison) | |
2009 | { | |
2010 | code = code2; | |
2011 | op0 = gimple_assign_rhs1 (second); | |
2012 | op1 = gimple_assign_rhs2 (second); | |
2013 | } | |
2014 | /* If jumps are cheap turn some more codes into | |
2015 | jumpy sequences. */ | |
2016 | else if (BRANCH_COST (optimize_insn_for_speed_p (), false) < 4) | |
2017 | { | |
2018 | if ((code2 == BIT_AND_EXPR | |
2019 | && TYPE_PRECISION (TREE_TYPE (op0)) == 1 | |
2020 | && TREE_CODE (gimple_assign_rhs2 (second)) != INTEGER_CST) | |
2021 | || code2 == TRUTH_AND_EXPR) | |
2022 | { | |
2023 | code = TRUTH_ANDIF_EXPR; | |
2024 | op0 = gimple_assign_rhs1 (second); | |
2025 | op1 = gimple_assign_rhs2 (second); | |
2026 | } | |
2027 | else if (code2 == BIT_IOR_EXPR || code2 == TRUTH_OR_EXPR) | |
2028 | { | |
2029 | code = TRUTH_ORIF_EXPR; | |
2030 | op0 = gimple_assign_rhs1 (second); | |
2031 | op1 = gimple_assign_rhs2 (second); | |
2032 | } | |
2033 | } | |
28ed065e MM |
2034 | } |
2035 | } | |
b7211528 SB |
2036 | |
2037 | last2 = last = get_last_insn (); | |
80c7a9eb RH |
2038 | |
2039 | extract_true_false_edges_from_block (bb, &true_edge, &false_edge); | |
5368224f | 2040 | set_curr_insn_location (gimple_location (stmt)); |
80c7a9eb RH |
2041 | |
2042 | /* These flags have no purpose in RTL land. */ | |
2043 | true_edge->flags &= ~EDGE_TRUE_VALUE; | |
2044 | false_edge->flags &= ~EDGE_FALSE_VALUE; | |
2045 | ||
2046 | /* We can either have a pure conditional jump with one fallthru edge or | |
2047 | two-way jump that needs to be decomposed into two basic blocks. */ | |
a9b77cd1 | 2048 | if (false_edge->dest == bb->next_bb) |
80c7a9eb | 2049 | { |
40e90eac JJ |
2050 | jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest), |
2051 | true_edge->probability); | |
726a989a | 2052 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
2f13f2de | 2053 | if (true_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2054 | set_curr_insn_location (true_edge->goto_locus); |
a9b77cd1 | 2055 | false_edge->flags |= EDGE_FALLTHRU; |
315adeda | 2056 | maybe_cleanup_end_of_block (false_edge, last); |
80c7a9eb RH |
2057 | return NULL; |
2058 | } | |
a9b77cd1 | 2059 | if (true_edge->dest == bb->next_bb) |
80c7a9eb | 2060 | { |
40e90eac JJ |
2061 | jumpifnot_1 (code, op0, op1, label_rtx_for_bb (false_edge->dest), |
2062 | false_edge->probability); | |
726a989a | 2063 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
2f13f2de | 2064 | if (false_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2065 | set_curr_insn_location (false_edge->goto_locus); |
a9b77cd1 | 2066 | true_edge->flags |= EDGE_FALLTHRU; |
315adeda | 2067 | maybe_cleanup_end_of_block (true_edge, last); |
80c7a9eb RH |
2068 | return NULL; |
2069 | } | |
80c7a9eb | 2070 | |
40e90eac JJ |
2071 | jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest), |
2072 | true_edge->probability); | |
80c7a9eb | 2073 | last = get_last_insn (); |
2f13f2de | 2074 | if (false_edge->goto_locus != UNKNOWN_LOCATION) |
5368224f | 2075 | set_curr_insn_location (false_edge->goto_locus); |
a9b77cd1 | 2076 | emit_jump (label_rtx_for_bb (false_edge->dest)); |
80c7a9eb RH |
2077 | |
2078 | BB_END (bb) = last; | |
2079 | if (BARRIER_P (BB_END (bb))) | |
2080 | BB_END (bb) = PREV_INSN (BB_END (bb)); | |
2081 | update_bb_for_insn (bb); | |
2082 | ||
2083 | new_bb = create_basic_block (NEXT_INSN (last), get_last_insn (), bb); | |
2084 | dest = false_edge->dest; | |
2085 | redirect_edge_succ (false_edge, new_bb); | |
2086 | false_edge->flags |= EDGE_FALLTHRU; | |
2087 | new_bb->count = false_edge->count; | |
2088 | new_bb->frequency = EDGE_FREQUENCY (false_edge); | |
7d776ee2 RG |
2089 | if (current_loops && bb->loop_father) |
2090 | add_bb_to_loop (new_bb, bb->loop_father); | |
80c7a9eb RH |
2091 | new_edge = make_edge (new_bb, dest, 0); |
2092 | new_edge->probability = REG_BR_PROB_BASE; | |
2093 | new_edge->count = new_bb->count; | |
2094 | if (BARRIER_P (BB_END (new_bb))) | |
2095 | BB_END (new_bb) = PREV_INSN (BB_END (new_bb)); | |
2096 | update_bb_for_insn (new_bb); | |
2097 | ||
726a989a | 2098 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
c22cacf3 | 2099 | |
2f13f2de | 2100 | if (true_edge->goto_locus != UNKNOWN_LOCATION) |
7787b4aa | 2101 | { |
5368224f DC |
2102 | set_curr_insn_location (true_edge->goto_locus); |
2103 | true_edge->goto_locus = curr_insn_location (); | |
7787b4aa | 2104 | } |
7787b4aa | 2105 | |
80c7a9eb RH |
2106 | return new_bb; |
2107 | } | |
2108 | ||
0a35513e AH |
2109 | /* Mark all calls that can have a transaction restart. */ |
2110 | ||
2111 | static void | |
2112 | mark_transaction_restart_calls (gimple stmt) | |
2113 | { | |
2114 | struct tm_restart_node dummy; | |
2115 | void **slot; | |
2116 | ||
2117 | if (!cfun->gimple_df->tm_restart) | |
2118 | return; | |
2119 | ||
2120 | dummy.stmt = stmt; | |
2121 | slot = htab_find_slot (cfun->gimple_df->tm_restart, &dummy, NO_INSERT); | |
2122 | if (slot) | |
2123 | { | |
2124 | struct tm_restart_node *n = (struct tm_restart_node *) *slot; | |
2125 | tree list = n->label_or_list; | |
2126 | rtx insn; | |
2127 | ||
2128 | for (insn = next_real_insn (get_last_insn ()); | |
2129 | !CALL_P (insn); | |
2130 | insn = next_real_insn (insn)) | |
2131 | continue; | |
2132 | ||
2133 | if (TREE_CODE (list) == LABEL_DECL) | |
2134 | add_reg_note (insn, REG_TM, label_rtx (list)); | |
2135 | else | |
2136 | for (; list ; list = TREE_CHAIN (list)) | |
2137 | add_reg_note (insn, REG_TM, label_rtx (TREE_VALUE (list))); | |
2138 | } | |
2139 | } | |
2140 | ||
28ed065e MM |
2141 | /* A subroutine of expand_gimple_stmt_1, expanding one GIMPLE_CALL |
2142 | statement STMT. */ | |
2143 | ||
2144 | static void | |
2145 | expand_call_stmt (gimple stmt) | |
2146 | { | |
25583c4f | 2147 | tree exp, decl, lhs; |
e23817b3 | 2148 | bool builtin_p; |
e7925582 | 2149 | size_t i; |
28ed065e | 2150 | |
25583c4f RS |
2151 | if (gimple_call_internal_p (stmt)) |
2152 | { | |
2153 | expand_internal_call (stmt); | |
2154 | return; | |
2155 | } | |
2156 | ||
e23817b3 RG |
2157 | decl = gimple_call_fndecl (stmt); |
2158 | builtin_p = decl && DECL_BUILT_IN (decl); | |
2159 | ||
01156003 IE |
2160 | /* Bind bounds call is expanded as assignment. */ |
2161 | if (builtin_p | |
2162 | && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL | |
2163 | && DECL_FUNCTION_CODE (decl) == BUILT_IN_CHKP_BIND_BOUNDS) | |
2164 | { | |
2165 | expand_assignment (gimple_call_lhs (stmt), | |
2166 | gimple_call_arg (stmt, 0), false); | |
2167 | return; | |
2168 | } | |
2169 | ||
2170 | exp = build_vl_exp (CALL_EXPR, gimple_call_num_args (stmt) + 3); | |
2171 | CALL_EXPR_FN (exp) = gimple_call_fn (stmt); | |
2172 | ||
e7925582 EB |
2173 | /* If this is not a builtin function, the function type through which the |
2174 | call is made may be different from the type of the function. */ | |
2175 | if (!builtin_p) | |
2176 | CALL_EXPR_FN (exp) | |
b25aa0e8 EB |
2177 | = fold_convert (build_pointer_type (gimple_call_fntype (stmt)), |
2178 | CALL_EXPR_FN (exp)); | |
e7925582 | 2179 | |
28ed065e MM |
2180 | TREE_TYPE (exp) = gimple_call_return_type (stmt); |
2181 | CALL_EXPR_STATIC_CHAIN (exp) = gimple_call_chain (stmt); | |
2182 | ||
2183 | for (i = 0; i < gimple_call_num_args (stmt); i++) | |
e23817b3 RG |
2184 | { |
2185 | tree arg = gimple_call_arg (stmt, i); | |
2186 | gimple def; | |
2187 | /* TER addresses into arguments of builtin functions so we have a | |
2188 | chance to infer more correct alignment information. See PR39954. */ | |
2189 | if (builtin_p | |
2190 | && TREE_CODE (arg) == SSA_NAME | |
2191 | && (def = get_gimple_for_ssa_name (arg)) | |
2192 | && gimple_assign_rhs_code (def) == ADDR_EXPR) | |
2193 | arg = gimple_assign_rhs1 (def); | |
2194 | CALL_EXPR_ARG (exp, i) = arg; | |
2195 | } | |
28ed065e | 2196 | |
93f28ca7 | 2197 | if (gimple_has_side_effects (stmt)) |
28ed065e MM |
2198 | TREE_SIDE_EFFECTS (exp) = 1; |
2199 | ||
93f28ca7 | 2200 | if (gimple_call_nothrow_p (stmt)) |
28ed065e MM |
2201 | TREE_NOTHROW (exp) = 1; |
2202 | ||
2203 | CALL_EXPR_TAILCALL (exp) = gimple_call_tail_p (stmt); | |
2204 | CALL_EXPR_RETURN_SLOT_OPT (exp) = gimple_call_return_slot_opt_p (stmt); | |
63d2a353 MM |
2205 | if (decl |
2206 | && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL | |
13e49da9 TV |
2207 | && (DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA |
2208 | || DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA_WITH_ALIGN)) | |
63d2a353 MM |
2209 | CALL_ALLOCA_FOR_VAR_P (exp) = gimple_call_alloca_for_var_p (stmt); |
2210 | else | |
2211 | CALL_FROM_THUNK_P (exp) = gimple_call_from_thunk_p (stmt); | |
28ed065e MM |
2212 | CALL_EXPR_VA_ARG_PACK (exp) = gimple_call_va_arg_pack_p (stmt); |
2213 | SET_EXPR_LOCATION (exp, gimple_location (stmt)); | |
28ed065e | 2214 | |
ddb555ed JJ |
2215 | /* Ensure RTL is created for debug args. */ |
2216 | if (decl && DECL_HAS_DEBUG_ARGS_P (decl)) | |
2217 | { | |
9771b263 | 2218 | vec<tree, va_gc> **debug_args = decl_debug_args_lookup (decl); |
ddb555ed JJ |
2219 | unsigned int ix; |
2220 | tree dtemp; | |
2221 | ||
2222 | if (debug_args) | |
9771b263 | 2223 | for (ix = 1; (*debug_args)->iterate (ix, &dtemp); ix += 2) |
ddb555ed JJ |
2224 | { |
2225 | gcc_assert (TREE_CODE (dtemp) == DEBUG_EXPR_DECL); | |
2226 | expand_debug_expr (dtemp); | |
2227 | } | |
2228 | } | |
2229 | ||
25583c4f | 2230 | lhs = gimple_call_lhs (stmt); |
28ed065e MM |
2231 | if (lhs) |
2232 | expand_assignment (lhs, exp, false); | |
2233 | else | |
2234 | expand_expr_real_1 (exp, const0_rtx, VOIDmode, EXPAND_NORMAL, NULL); | |
0a35513e AH |
2235 | |
2236 | mark_transaction_restart_calls (stmt); | |
28ed065e MM |
2237 | } |
2238 | ||
862d0b35 DN |
2239 | |
2240 | /* Generate RTL for an asm statement (explicit assembler code). | |
2241 | STRING is a STRING_CST node containing the assembler code text, | |
2242 | or an ADDR_EXPR containing a STRING_CST. VOL nonzero means the | |
2243 | insn is volatile; don't optimize it. */ | |
2244 | ||
2245 | static void | |
2246 | expand_asm_loc (tree string, int vol, location_t locus) | |
2247 | { | |
2248 | rtx body; | |
2249 | ||
2250 | if (TREE_CODE (string) == ADDR_EXPR) | |
2251 | string = TREE_OPERAND (string, 0); | |
2252 | ||
2253 | body = gen_rtx_ASM_INPUT_loc (VOIDmode, | |
2254 | ggc_strdup (TREE_STRING_POINTER (string)), | |
2255 | locus); | |
2256 | ||
2257 | MEM_VOLATILE_P (body) = vol; | |
2258 | ||
2259 | emit_insn (body); | |
2260 | } | |
2261 | ||
2262 | /* Return the number of times character C occurs in string S. */ | |
2263 | static int | |
2264 | n_occurrences (int c, const char *s) | |
2265 | { | |
2266 | int n = 0; | |
2267 | while (*s) | |
2268 | n += (*s++ == c); | |
2269 | return n; | |
2270 | } | |
2271 | ||
2272 | /* A subroutine of expand_asm_operands. Check that all operands have | |
2273 | the same number of alternatives. Return true if so. */ | |
2274 | ||
2275 | static bool | |
2276 | check_operand_nalternatives (tree outputs, tree inputs) | |
2277 | { | |
2278 | if (outputs || inputs) | |
2279 | { | |
2280 | tree tmp = TREE_PURPOSE (outputs ? outputs : inputs); | |
2281 | int nalternatives | |
2282 | = n_occurrences (',', TREE_STRING_POINTER (TREE_VALUE (tmp))); | |
2283 | tree next = inputs; | |
2284 | ||
2285 | if (nalternatives + 1 > MAX_RECOG_ALTERNATIVES) | |
2286 | { | |
2287 | error ("too many alternatives in %<asm%>"); | |
2288 | return false; | |
2289 | } | |
2290 | ||
2291 | tmp = outputs; | |
2292 | while (tmp) | |
2293 | { | |
2294 | const char *constraint | |
2295 | = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (tmp))); | |
2296 | ||
2297 | if (n_occurrences (',', constraint) != nalternatives) | |
2298 | { | |
2299 | error ("operand constraints for %<asm%> differ " | |
2300 | "in number of alternatives"); | |
2301 | return false; | |
2302 | } | |
2303 | ||
2304 | if (TREE_CHAIN (tmp)) | |
2305 | tmp = TREE_CHAIN (tmp); | |
2306 | else | |
2307 | tmp = next, next = 0; | |
2308 | } | |
2309 | } | |
2310 | ||
2311 | return true; | |
2312 | } | |
2313 | ||
2314 | /* Check for overlap between registers marked in CLOBBERED_REGS and | |
2315 | anything inappropriate in T. Emit error and return the register | |
2316 | variable definition for error, NULL_TREE for ok. */ | |
2317 | ||
2318 | static bool | |
2319 | tree_conflicts_with_clobbers_p (tree t, HARD_REG_SET *clobbered_regs) | |
2320 | { | |
2321 | /* Conflicts between asm-declared register variables and the clobber | |
2322 | list are not allowed. */ | |
2323 | tree overlap = tree_overlaps_hard_reg_set (t, clobbered_regs); | |
2324 | ||
2325 | if (overlap) | |
2326 | { | |
2327 | error ("asm-specifier for variable %qE conflicts with asm clobber list", | |
2328 | DECL_NAME (overlap)); | |
2329 | ||
2330 | /* Reset registerness to stop multiple errors emitted for a single | |
2331 | variable. */ | |
2332 | DECL_REGISTER (overlap) = 0; | |
2333 | return true; | |
2334 | } | |
2335 | ||
2336 | return false; | |
2337 | } | |
2338 | ||
2339 | /* Generate RTL for an asm statement with arguments. | |
2340 | STRING is the instruction template. | |
2341 | OUTPUTS is a list of output arguments (lvalues); INPUTS a list of inputs. | |
2342 | Each output or input has an expression in the TREE_VALUE and | |
2343 | a tree list in TREE_PURPOSE which in turn contains a constraint | |
2344 | name in TREE_VALUE (or NULL_TREE) and a constraint string | |
2345 | in TREE_PURPOSE. | |
2346 | CLOBBERS is a list of STRING_CST nodes each naming a hard register | |
2347 | that is clobbered by this insn. | |
2348 | ||
2349 | LABELS is a list of labels, and if LABELS is non-NULL, FALLTHRU_BB | |
2350 | should be the fallthru basic block of the asm goto. | |
2351 | ||
2352 | Not all kinds of lvalue that may appear in OUTPUTS can be stored directly. | |
2353 | Some elements of OUTPUTS may be replaced with trees representing temporary | |
2354 | values. The caller should copy those temporary values to the originally | |
2355 | specified lvalues. | |
2356 | ||
2357 | VOL nonzero means the insn is volatile; don't optimize it. */ | |
2358 | ||
2359 | static void | |
2360 | expand_asm_operands (tree string, tree outputs, tree inputs, | |
2361 | tree clobbers, tree labels, basic_block fallthru_bb, | |
2362 | int vol, location_t locus) | |
2363 | { | |
2364 | rtvec argvec, constraintvec, labelvec; | |
2365 | rtx body; | |
2366 | int ninputs = list_length (inputs); | |
2367 | int noutputs = list_length (outputs); | |
2368 | int nlabels = list_length (labels); | |
2369 | int ninout; | |
2370 | int nclobbers; | |
2371 | HARD_REG_SET clobbered_regs; | |
2372 | int clobber_conflict_found = 0; | |
2373 | tree tail; | |
2374 | tree t; | |
2375 | int i; | |
2376 | /* Vector of RTX's of evaluated output operands. */ | |
2377 | rtx *output_rtx = XALLOCAVEC (rtx, noutputs); | |
2378 | int *inout_opnum = XALLOCAVEC (int, noutputs); | |
2379 | rtx *real_output_rtx = XALLOCAVEC (rtx, noutputs); | |
2380 | enum machine_mode *inout_mode = XALLOCAVEC (enum machine_mode, noutputs); | |
2381 | const char **constraints = XALLOCAVEC (const char *, noutputs + ninputs); | |
2382 | int old_generating_concat_p = generating_concat_p; | |
2383 | rtx fallthru_label = NULL_RTX; | |
2384 | ||
2385 | /* An ASM with no outputs needs to be treated as volatile, for now. */ | |
2386 | if (noutputs == 0) | |
2387 | vol = 1; | |
2388 | ||
2389 | if (! check_operand_nalternatives (outputs, inputs)) | |
2390 | return; | |
2391 | ||
2392 | string = resolve_asm_operand_names (string, outputs, inputs, labels); | |
2393 | ||
2394 | /* Collect constraints. */ | |
2395 | i = 0; | |
2396 | for (t = outputs; t ; t = TREE_CHAIN (t), i++) | |
2397 | constraints[i] = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); | |
2398 | for (t = inputs; t ; t = TREE_CHAIN (t), i++) | |
2399 | constraints[i] = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); | |
2400 | ||
2401 | /* Sometimes we wish to automatically clobber registers across an asm. | |
2402 | Case in point is when the i386 backend moved from cc0 to a hard reg -- | |
2403 | maintaining source-level compatibility means automatically clobbering | |
2404 | the flags register. */ | |
2405 | clobbers = targetm.md_asm_clobbers (outputs, inputs, clobbers); | |
2406 | ||
2407 | /* Count the number of meaningful clobbered registers, ignoring what | |
2408 | we would ignore later. */ | |
2409 | nclobbers = 0; | |
2410 | CLEAR_HARD_REG_SET (clobbered_regs); | |
2411 | for (tail = clobbers; tail; tail = TREE_CHAIN (tail)) | |
2412 | { | |
2413 | const char *regname; | |
2414 | int nregs; | |
2415 | ||
2416 | if (TREE_VALUE (tail) == error_mark_node) | |
2417 | return; | |
2418 | regname = TREE_STRING_POINTER (TREE_VALUE (tail)); | |
2419 | ||
2420 | i = decode_reg_name_and_count (regname, &nregs); | |
2421 | if (i == -4) | |
2422 | ++nclobbers; | |
2423 | else if (i == -2) | |
2424 | error ("unknown register name %qs in %<asm%>", regname); | |
2425 | ||
2426 | /* Mark clobbered registers. */ | |
2427 | if (i >= 0) | |
2428 | { | |
2429 | int reg; | |
2430 | ||
2431 | for (reg = i; reg < i + nregs; reg++) | |
2432 | { | |
2433 | ++nclobbers; | |
2434 | ||
2435 | /* Clobbering the PIC register is an error. */ | |
2436 | if (reg == (int) PIC_OFFSET_TABLE_REGNUM) | |
2437 | { | |
2438 | error ("PIC register clobbered by %qs in %<asm%>", regname); | |
2439 | return; | |
2440 | } | |
2441 | ||
2442 | SET_HARD_REG_BIT (clobbered_regs, reg); | |
2443 | } | |
2444 | } | |
2445 | } | |
2446 | ||
2447 | /* First pass over inputs and outputs checks validity and sets | |
2448 | mark_addressable if needed. */ | |
2449 | ||
2450 | ninout = 0; | |
2451 | for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++) | |
2452 | { | |
2453 | tree val = TREE_VALUE (tail); | |
2454 | tree type = TREE_TYPE (val); | |
2455 | const char *constraint; | |
2456 | bool is_inout; | |
2457 | bool allows_reg; | |
2458 | bool allows_mem; | |
2459 | ||
2460 | /* If there's an erroneous arg, emit no insn. */ | |
2461 | if (type == error_mark_node) | |
2462 | return; | |
2463 | ||
2464 | /* Try to parse the output constraint. If that fails, there's | |
2465 | no point in going further. */ | |
2466 | constraint = constraints[i]; | |
2467 | if (!parse_output_constraint (&constraint, i, ninputs, noutputs, | |
2468 | &allows_mem, &allows_reg, &is_inout)) | |
2469 | return; | |
2470 | ||
2471 | if (! allows_reg | |
2472 | && (allows_mem | |
2473 | || is_inout | |
2474 | || (DECL_P (val) | |
2475 | && REG_P (DECL_RTL (val)) | |
2476 | && GET_MODE (DECL_RTL (val)) != TYPE_MODE (type)))) | |
2477 | mark_addressable (val); | |
2478 | ||
2479 | if (is_inout) | |
2480 | ninout++; | |
2481 | } | |
2482 | ||
2483 | ninputs += ninout; | |
2484 | if (ninputs + noutputs > MAX_RECOG_OPERANDS) | |
2485 | { | |
2486 | error ("more than %d operands in %<asm%>", MAX_RECOG_OPERANDS); | |
2487 | return; | |
2488 | } | |
2489 | ||
2490 | for (i = 0, tail = inputs; tail; i++, tail = TREE_CHAIN (tail)) | |
2491 | { | |
2492 | bool allows_reg, allows_mem; | |
2493 | const char *constraint; | |
2494 | ||
2495 | /* If there's an erroneous arg, emit no insn, because the ASM_INPUT | |
2496 | would get VOIDmode and that could cause a crash in reload. */ | |
2497 | if (TREE_TYPE (TREE_VALUE (tail)) == error_mark_node) | |
2498 | return; | |
2499 | ||
2500 | constraint = constraints[i + noutputs]; | |
2501 | if (! parse_input_constraint (&constraint, i, ninputs, noutputs, ninout, | |
2502 | constraints, &allows_mem, &allows_reg)) | |
2503 | return; | |
2504 | ||
2505 | if (! allows_reg && allows_mem) | |
2506 | mark_addressable (TREE_VALUE (tail)); | |
2507 | } | |
2508 | ||
2509 | /* Second pass evaluates arguments. */ | |
2510 | ||
2511 | /* Make sure stack is consistent for asm goto. */ | |
2512 | if (nlabels > 0) | |
2513 | do_pending_stack_adjust (); | |
2514 | ||
2515 | ninout = 0; | |
2516 | for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++) | |
2517 | { | |
2518 | tree val = TREE_VALUE (tail); | |
2519 | tree type = TREE_TYPE (val); | |
2520 | bool is_inout; | |
2521 | bool allows_reg; | |
2522 | bool allows_mem; | |
2523 | rtx op; | |
2524 | bool ok; | |
2525 | ||
2526 | ok = parse_output_constraint (&constraints[i], i, ninputs, | |
2527 | noutputs, &allows_mem, &allows_reg, | |
2528 | &is_inout); | |
2529 | gcc_assert (ok); | |
2530 | ||
2531 | /* If an output operand is not a decl or indirect ref and our constraint | |
2532 | allows a register, make a temporary to act as an intermediate. | |
2533 | Make the asm insn write into that, then our caller will copy it to | |
2534 | the real output operand. Likewise for promoted variables. */ | |
2535 | ||
2536 | generating_concat_p = 0; | |
2537 | ||
2538 | real_output_rtx[i] = NULL_RTX; | |
2539 | if ((TREE_CODE (val) == INDIRECT_REF | |
2540 | && allows_mem) | |
2541 | || (DECL_P (val) | |
2542 | && (allows_mem || REG_P (DECL_RTL (val))) | |
2543 | && ! (REG_P (DECL_RTL (val)) | |
2544 | && GET_MODE (DECL_RTL (val)) != TYPE_MODE (type))) | |
2545 | || ! allows_reg | |
2546 | || is_inout) | |
2547 | { | |
2548 | op = expand_expr (val, NULL_RTX, VOIDmode, | |
2549 | !allows_reg ? EXPAND_MEMORY : EXPAND_WRITE); | |
2550 | if (MEM_P (op)) | |
2551 | op = validize_mem (op); | |
2552 | ||
2553 | if (! allows_reg && !MEM_P (op)) | |
2554 | error ("output number %d not directly addressable", i); | |
2555 | if ((! allows_mem && MEM_P (op)) | |
2556 | || GET_CODE (op) == CONCAT) | |
2557 | { | |
2558 | real_output_rtx[i] = op; | |
2559 | op = gen_reg_rtx (GET_MODE (op)); | |
2560 | if (is_inout) | |
2561 | emit_move_insn (op, real_output_rtx[i]); | |
2562 | } | |
2563 | } | |
2564 | else | |
2565 | { | |
2566 | op = assign_temp (type, 0, 1); | |
2567 | op = validize_mem (op); | |
2568 | if (!MEM_P (op) && TREE_CODE (TREE_VALUE (tail)) == SSA_NAME) | |
2569 | set_reg_attrs_for_decl_rtl (SSA_NAME_VAR (TREE_VALUE (tail)), op); | |
2570 | TREE_VALUE (tail) = make_tree (type, op); | |
2571 | } | |
2572 | output_rtx[i] = op; | |
2573 | ||
2574 | generating_concat_p = old_generating_concat_p; | |
2575 | ||
2576 | if (is_inout) | |
2577 | { | |
2578 | inout_mode[ninout] = TYPE_MODE (type); | |
2579 | inout_opnum[ninout++] = i; | |
2580 | } | |
2581 | ||
2582 | if (tree_conflicts_with_clobbers_p (val, &clobbered_regs)) | |
2583 | clobber_conflict_found = 1; | |
2584 | } | |
2585 | ||
2586 | /* Make vectors for the expression-rtx, constraint strings, | |
2587 | and named operands. */ | |
2588 | ||
2589 | argvec = rtvec_alloc (ninputs); | |
2590 | constraintvec = rtvec_alloc (ninputs); | |
2591 | labelvec = rtvec_alloc (nlabels); | |
2592 | ||
2593 | body = gen_rtx_ASM_OPERANDS ((noutputs == 0 ? VOIDmode | |
2594 | : GET_MODE (output_rtx[0])), | |
2595 | ggc_strdup (TREE_STRING_POINTER (string)), | |
2596 | empty_string, 0, argvec, constraintvec, | |
2597 | labelvec, locus); | |
2598 | ||
2599 | MEM_VOLATILE_P (body) = vol; | |
2600 | ||
2601 | /* Eval the inputs and put them into ARGVEC. | |
2602 | Put their constraints into ASM_INPUTs and store in CONSTRAINTS. */ | |
2603 | ||
2604 | for (i = 0, tail = inputs; tail; tail = TREE_CHAIN (tail), ++i) | |
2605 | { | |
2606 | bool allows_reg, allows_mem; | |
2607 | const char *constraint; | |
2608 | tree val, type; | |
2609 | rtx op; | |
2610 | bool ok; | |
2611 | ||
2612 | constraint = constraints[i + noutputs]; | |
2613 | ok = parse_input_constraint (&constraint, i, ninputs, noutputs, ninout, | |
2614 | constraints, &allows_mem, &allows_reg); | |
2615 | gcc_assert (ok); | |
2616 | ||
2617 | generating_concat_p = 0; | |
2618 | ||
2619 | val = TREE_VALUE (tail); | |
2620 | type = TREE_TYPE (val); | |
2621 | /* EXPAND_INITIALIZER will not generate code for valid initializer | |
2622 | constants, but will still generate code for other types of operand. | |
2623 | This is the behavior we want for constant constraints. */ | |
2624 | op = expand_expr (val, NULL_RTX, VOIDmode, | |
2625 | allows_reg ? EXPAND_NORMAL | |
2626 | : allows_mem ? EXPAND_MEMORY | |
2627 | : EXPAND_INITIALIZER); | |
2628 | ||
2629 | /* Never pass a CONCAT to an ASM. */ | |
2630 | if (GET_CODE (op) == CONCAT) | |
2631 | op = force_reg (GET_MODE (op), op); | |
2632 | else if (MEM_P (op)) | |
2633 | op = validize_mem (op); | |
2634 | ||
2635 | if (asm_operand_ok (op, constraint, NULL) <= 0) | |
2636 | { | |
2637 | if (allows_reg && TYPE_MODE (type) != BLKmode) | |
2638 | op = force_reg (TYPE_MODE (type), op); | |
2639 | else if (!allows_mem) | |
2640 | warning (0, "asm operand %d probably doesn%'t match constraints", | |
2641 | i + noutputs); | |
2642 | else if (MEM_P (op)) | |
2643 | { | |
2644 | /* We won't recognize either volatile memory or memory | |
2645 | with a queued address as available a memory_operand | |
2646 | at this point. Ignore it: clearly this *is* a memory. */ | |
2647 | } | |
2648 | else | |
2649 | gcc_unreachable (); | |
2650 | } | |
2651 | ||
2652 | generating_concat_p = old_generating_concat_p; | |
2653 | ASM_OPERANDS_INPUT (body, i) = op; | |
2654 | ||
2655 | ASM_OPERANDS_INPUT_CONSTRAINT_EXP (body, i) | |
2656 | = gen_rtx_ASM_INPUT (TYPE_MODE (type), | |
2657 | ggc_strdup (constraints[i + noutputs])); | |
2658 | ||
2659 | if (tree_conflicts_with_clobbers_p (val, &clobbered_regs)) | |
2660 | clobber_conflict_found = 1; | |
2661 | } | |
2662 | ||
2663 | /* Protect all the operands from the queue now that they have all been | |
2664 | evaluated. */ | |
2665 | ||
2666 | generating_concat_p = 0; | |
2667 | ||
2668 | /* For in-out operands, copy output rtx to input rtx. */ | |
2669 | for (i = 0; i < ninout; i++) | |
2670 | { | |
2671 | int j = inout_opnum[i]; | |
2672 | char buffer[16]; | |
2673 | ||
2674 | ASM_OPERANDS_INPUT (body, ninputs - ninout + i) | |
2675 | = output_rtx[j]; | |
2676 | ||
2677 | sprintf (buffer, "%d", j); | |
2678 | ASM_OPERANDS_INPUT_CONSTRAINT_EXP (body, ninputs - ninout + i) | |
2679 | = gen_rtx_ASM_INPUT (inout_mode[i], ggc_strdup (buffer)); | |
2680 | } | |
2681 | ||
2682 | /* Copy labels to the vector. */ | |
2683 | for (i = 0, tail = labels; i < nlabels; ++i, tail = TREE_CHAIN (tail)) | |
2684 | { | |
2685 | rtx r; | |
2686 | /* If asm goto has any labels in the fallthru basic block, use | |
2687 | a label that we emit immediately after the asm goto. Expansion | |
2688 | may insert further instructions into the same basic block after | |
2689 | asm goto and if we don't do this, insertion of instructions on | |
2690 | the fallthru edge might misbehave. See PR58670. */ | |
2691 | if (fallthru_bb | |
2692 | && label_to_block_fn (cfun, TREE_VALUE (tail)) == fallthru_bb) | |
2693 | { | |
2694 | if (fallthru_label == NULL_RTX) | |
2695 | fallthru_label = gen_label_rtx (); | |
2696 | r = fallthru_label; | |
2697 | } | |
2698 | else | |
2699 | r = label_rtx (TREE_VALUE (tail)); | |
2700 | ASM_OPERANDS_LABEL (body, i) = gen_rtx_LABEL_REF (Pmode, r); | |
2701 | } | |
2702 | ||
2703 | generating_concat_p = old_generating_concat_p; | |
2704 | ||
2705 | /* Now, for each output, construct an rtx | |
2706 | (set OUTPUT (asm_operands INSN OUTPUTCONSTRAINT OUTPUTNUMBER | |
2707 | ARGVEC CONSTRAINTS OPNAMES)) | |
2708 | If there is more than one, put them inside a PARALLEL. */ | |
2709 | ||
2710 | if (nlabels > 0 && nclobbers == 0) | |
2711 | { | |
2712 | gcc_assert (noutputs == 0); | |
2713 | emit_jump_insn (body); | |
2714 | } | |
2715 | else if (noutputs == 0 && nclobbers == 0) | |
2716 | { | |
2717 | /* No output operands: put in a raw ASM_OPERANDS rtx. */ | |
2718 | emit_insn (body); | |
2719 | } | |
2720 | else if (noutputs == 1 && nclobbers == 0) | |
2721 | { | |
2722 | ASM_OPERANDS_OUTPUT_CONSTRAINT (body) = ggc_strdup (constraints[0]); | |
2723 | emit_insn (gen_rtx_SET (VOIDmode, output_rtx[0], body)); | |
2724 | } | |
2725 | else | |
2726 | { | |
2727 | rtx obody = body; | |
2728 | int num = noutputs; | |
2729 | ||
2730 | if (num == 0) | |
2731 | num = 1; | |
2732 | ||
2733 | body = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (num + nclobbers)); | |
2734 | ||
2735 | /* For each output operand, store a SET. */ | |
2736 | for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++) | |
2737 | { | |
2738 | XVECEXP (body, 0, i) | |
2739 | = gen_rtx_SET (VOIDmode, | |
2740 | output_rtx[i], | |
2741 | gen_rtx_ASM_OPERANDS | |
2742 | (GET_MODE (output_rtx[i]), | |
2743 | ggc_strdup (TREE_STRING_POINTER (string)), | |
2744 | ggc_strdup (constraints[i]), | |
2745 | i, argvec, constraintvec, labelvec, locus)); | |
2746 | ||
2747 | MEM_VOLATILE_P (SET_SRC (XVECEXP (body, 0, i))) = vol; | |
2748 | } | |
2749 | ||
2750 | /* If there are no outputs (but there are some clobbers) | |
2751 | store the bare ASM_OPERANDS into the PARALLEL. */ | |
2752 | ||
2753 | if (i == 0) | |
2754 | XVECEXP (body, 0, i++) = obody; | |
2755 | ||
2756 | /* Store (clobber REG) for each clobbered register specified. */ | |
2757 | ||
2758 | for (tail = clobbers; tail; tail = TREE_CHAIN (tail)) | |
2759 | { | |
2760 | const char *regname = TREE_STRING_POINTER (TREE_VALUE (tail)); | |
2761 | int reg, nregs; | |
2762 | int j = decode_reg_name_and_count (regname, &nregs); | |
2763 | rtx clobbered_reg; | |
2764 | ||
2765 | if (j < 0) | |
2766 | { | |
2767 | if (j == -3) /* `cc', which is not a register */ | |
2768 | continue; | |
2769 | ||
2770 | if (j == -4) /* `memory', don't cache memory across asm */ | |
2771 | { | |
2772 | XVECEXP (body, 0, i++) | |
2773 | = gen_rtx_CLOBBER (VOIDmode, | |
2774 | gen_rtx_MEM | |
2775 | (BLKmode, | |
2776 | gen_rtx_SCRATCH (VOIDmode))); | |
2777 | continue; | |
2778 | } | |
2779 | ||
2780 | /* Ignore unknown register, error already signaled. */ | |
2781 | continue; | |
2782 | } | |
2783 | ||
2784 | for (reg = j; reg < j + nregs; reg++) | |
2785 | { | |
2786 | /* Use QImode since that's guaranteed to clobber just | |
2787 | * one reg. */ | |
2788 | clobbered_reg = gen_rtx_REG (QImode, reg); | |
2789 | ||
2790 | /* Do sanity check for overlap between clobbers and | |
2791 | respectively input and outputs that hasn't been | |
2792 | handled. Such overlap should have been detected and | |
2793 | reported above. */ | |
2794 | if (!clobber_conflict_found) | |
2795 | { | |
2796 | int opno; | |
2797 | ||
2798 | /* We test the old body (obody) contents to avoid | |
2799 | tripping over the under-construction body. */ | |
2800 | for (opno = 0; opno < noutputs; opno++) | |
2801 | if (reg_overlap_mentioned_p (clobbered_reg, | |
2802 | output_rtx[opno])) | |
2803 | internal_error | |
2804 | ("asm clobber conflict with output operand"); | |
2805 | ||
2806 | for (opno = 0; opno < ninputs - ninout; opno++) | |
2807 | if (reg_overlap_mentioned_p (clobbered_reg, | |
2808 | ASM_OPERANDS_INPUT (obody, | |
2809 | opno))) | |
2810 | internal_error | |
2811 | ("asm clobber conflict with input operand"); | |
2812 | } | |
2813 | ||
2814 | XVECEXP (body, 0, i++) | |
2815 | = gen_rtx_CLOBBER (VOIDmode, clobbered_reg); | |
2816 | } | |
2817 | } | |
2818 | ||
2819 | if (nlabels > 0) | |
2820 | emit_jump_insn (body); | |
2821 | else | |
2822 | emit_insn (body); | |
2823 | } | |
2824 | ||
2825 | if (fallthru_label) | |
2826 | emit_label (fallthru_label); | |
2827 | ||
2828 | /* For any outputs that needed reloading into registers, spill them | |
2829 | back to where they belong. */ | |
2830 | for (i = 0; i < noutputs; ++i) | |
2831 | if (real_output_rtx[i]) | |
2832 | emit_move_insn (real_output_rtx[i], output_rtx[i]); | |
2833 | ||
2834 | crtl->has_asm_statement = 1; | |
2835 | free_temp_slots (); | |
2836 | } | |
2837 | ||
2838 | ||
2839 | static void | |
2840 | expand_asm_stmt (gimple stmt) | |
2841 | { | |
2842 | int noutputs; | |
2843 | tree outputs, tail, t; | |
2844 | tree *o; | |
2845 | size_t i, n; | |
2846 | const char *s; | |
2847 | tree str, out, in, cl, labels; | |
2848 | location_t locus = gimple_location (stmt); | |
2849 | basic_block fallthru_bb = NULL; | |
2850 | ||
2851 | /* Meh... convert the gimple asm operands into real tree lists. | |
2852 | Eventually we should make all routines work on the vectors instead | |
2853 | of relying on TREE_CHAIN. */ | |
2854 | out = NULL_TREE; | |
2855 | n = gimple_asm_noutputs (stmt); | |
2856 | if (n > 0) | |
2857 | { | |
2858 | t = out = gimple_asm_output_op (stmt, 0); | |
2859 | for (i = 1; i < n; i++) | |
2860 | t = TREE_CHAIN (t) = gimple_asm_output_op (stmt, i); | |
2861 | } | |
2862 | ||
2863 | in = NULL_TREE; | |
2864 | n = gimple_asm_ninputs (stmt); | |
2865 | if (n > 0) | |
2866 | { | |
2867 | t = in = gimple_asm_input_op (stmt, 0); | |
2868 | for (i = 1; i < n; i++) | |
2869 | t = TREE_CHAIN (t) = gimple_asm_input_op (stmt, i); | |
2870 | } | |
2871 | ||
2872 | cl = NULL_TREE; | |
2873 | n = gimple_asm_nclobbers (stmt); | |
2874 | if (n > 0) | |
2875 | { | |
2876 | t = cl = gimple_asm_clobber_op (stmt, 0); | |
2877 | for (i = 1; i < n; i++) | |
2878 | t = TREE_CHAIN (t) = gimple_asm_clobber_op (stmt, i); | |
2879 | } | |
2880 | ||
2881 | labels = NULL_TREE; | |
2882 | n = gimple_asm_nlabels (stmt); | |
2883 | if (n > 0) | |
2884 | { | |
2885 | edge fallthru = find_fallthru_edge (gimple_bb (stmt)->succs); | |
2886 | if (fallthru) | |
2887 | fallthru_bb = fallthru->dest; | |
2888 | t = labels = gimple_asm_label_op (stmt, 0); | |
2889 | for (i = 1; i < n; i++) | |
2890 | t = TREE_CHAIN (t) = gimple_asm_label_op (stmt, i); | |
2891 | } | |
2892 | ||
2893 | s = gimple_asm_string (stmt); | |
2894 | str = build_string (strlen (s), s); | |
2895 | ||
2896 | if (gimple_asm_input_p (stmt)) | |
2897 | { | |
2898 | expand_asm_loc (str, gimple_asm_volatile_p (stmt), locus); | |
2899 | return; | |
2900 | } | |
2901 | ||
2902 | outputs = out; | |
2903 | noutputs = gimple_asm_noutputs (stmt); | |
2904 | /* o[I] is the place that output number I should be written. */ | |
2905 | o = (tree *) alloca (noutputs * sizeof (tree)); | |
2906 | ||
2907 | /* Record the contents of OUTPUTS before it is modified. */ | |
2908 | for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++) | |
2909 | o[i] = TREE_VALUE (tail); | |
2910 | ||
2911 | /* Generate the ASM_OPERANDS insn; store into the TREE_VALUEs of | |
2912 | OUTPUTS some trees for where the values were actually stored. */ | |
2913 | expand_asm_operands (str, outputs, in, cl, labels, fallthru_bb, | |
2914 | gimple_asm_volatile_p (stmt), locus); | |
2915 | ||
2916 | /* Copy all the intermediate outputs into the specified outputs. */ | |
2917 | for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++) | |
2918 | { | |
2919 | if (o[i] != TREE_VALUE (tail)) | |
2920 | { | |
2921 | expand_assignment (o[i], TREE_VALUE (tail), false); | |
2922 | free_temp_slots (); | |
2923 | ||
2924 | /* Restore the original value so that it's correct the next | |
2925 | time we expand this function. */ | |
2926 | TREE_VALUE (tail) = o[i]; | |
2927 | } | |
2928 | } | |
2929 | } | |
2930 | ||
2931 | /* Emit code to jump to the address | |
2932 | specified by the pointer expression EXP. */ | |
2933 | ||
2934 | static void | |
2935 | expand_computed_goto (tree exp) | |
2936 | { | |
2937 | rtx x = expand_normal (exp); | |
2938 | ||
2939 | x = convert_memory_address (Pmode, x); | |
2940 | ||
2941 | do_pending_stack_adjust (); | |
2942 | emit_indirect_jump (x); | |
2943 | } | |
2944 | ||
2945 | /* Generate RTL code for a `goto' statement with target label LABEL. | |
2946 | LABEL should be a LABEL_DECL tree node that was or will later be | |
2947 | defined with `expand_label'. */ | |
2948 | ||
2949 | static void | |
2950 | expand_goto (tree label) | |
2951 | { | |
2952 | #ifdef ENABLE_CHECKING | |
2953 | /* Check for a nonlocal goto to a containing function. Should have | |
2954 | gotten translated to __builtin_nonlocal_goto. */ | |
2955 | tree context = decl_function_context (label); | |
2956 | gcc_assert (!context || context == current_function_decl); | |
2957 | #endif | |
2958 | ||
2959 | emit_jump (label_rtx (label)); | |
2960 | } | |
2961 | ||
2962 | /* Output a return with no value. */ | |
2963 | ||
2964 | static void | |
2965 | expand_null_return_1 (void) | |
2966 | { | |
2967 | clear_pending_stack_adjust (); | |
2968 | do_pending_stack_adjust (); | |
2969 | emit_jump (return_label); | |
2970 | } | |
2971 | ||
2972 | /* Generate RTL to return from the current function, with no value. | |
2973 | (That is, we do not do anything about returning any value.) */ | |
2974 | ||
2975 | void | |
2976 | expand_null_return (void) | |
2977 | { | |
2978 | /* If this function was declared to return a value, but we | |
2979 | didn't, clobber the return registers so that they are not | |
2980 | propagated live to the rest of the function. */ | |
2981 | clobber_return_register (); | |
2982 | ||
2983 | expand_null_return_1 (); | |
2984 | } | |
2985 | ||
2986 | /* Generate RTL to return from the current function, with value VAL. */ | |
2987 | ||
2988 | static void | |
2989 | expand_value_return (rtx val) | |
2990 | { | |
2991 | /* Copy the value to the return location unless it's already there. */ | |
2992 | ||
2993 | tree decl = DECL_RESULT (current_function_decl); | |
2994 | rtx return_reg = DECL_RTL (decl); | |
2995 | if (return_reg != val) | |
2996 | { | |
2997 | tree funtype = TREE_TYPE (current_function_decl); | |
2998 | tree type = TREE_TYPE (decl); | |
2999 | int unsignedp = TYPE_UNSIGNED (type); | |
3000 | enum machine_mode old_mode = DECL_MODE (decl); | |
3001 | enum machine_mode mode; | |
3002 | if (DECL_BY_REFERENCE (decl)) | |
3003 | mode = promote_function_mode (type, old_mode, &unsignedp, funtype, 2); | |
3004 | else | |
3005 | mode = promote_function_mode (type, old_mode, &unsignedp, funtype, 1); | |
3006 | ||
3007 | if (mode != old_mode) | |
3008 | val = convert_modes (mode, old_mode, val, unsignedp); | |
3009 | ||
3010 | if (GET_CODE (return_reg) == PARALLEL) | |
3011 | emit_group_load (return_reg, val, type, int_size_in_bytes (type)); | |
3012 | else | |
3013 | emit_move_insn (return_reg, val); | |
3014 | } | |
3015 | ||
3016 | expand_null_return_1 (); | |
3017 | } | |
3018 | ||
3019 | /* Generate RTL to evaluate the expression RETVAL and return it | |
3020 | from the current function. */ | |
3021 | ||
3022 | static void | |
3023 | expand_return (tree retval) | |
3024 | { | |
3025 | rtx result_rtl; | |
3026 | rtx val = 0; | |
3027 | tree retval_rhs; | |
3028 | ||
3029 | /* If function wants no value, give it none. */ | |
3030 | if (TREE_CODE (TREE_TYPE (TREE_TYPE (current_function_decl))) == VOID_TYPE) | |
3031 | { | |
3032 | expand_normal (retval); | |
3033 | expand_null_return (); | |
3034 | return; | |
3035 | } | |
3036 | ||
3037 | if (retval == error_mark_node) | |
3038 | { | |
3039 | /* Treat this like a return of no value from a function that | |
3040 | returns a value. */ | |
3041 | expand_null_return (); | |
3042 | return; | |
3043 | } | |
3044 | else if ((TREE_CODE (retval) == MODIFY_EXPR | |
3045 | || TREE_CODE (retval) == INIT_EXPR) | |
3046 | && TREE_CODE (TREE_OPERAND (retval, 0)) == RESULT_DECL) | |
3047 | retval_rhs = TREE_OPERAND (retval, 1); | |
3048 | else | |
3049 | retval_rhs = retval; | |
3050 | ||
3051 | result_rtl = DECL_RTL (DECL_RESULT (current_function_decl)); | |
3052 | ||
3053 | /* If we are returning the RESULT_DECL, then the value has already | |
3054 | been stored into it, so we don't have to do anything special. */ | |
3055 | if (TREE_CODE (retval_rhs) == RESULT_DECL) | |
3056 | expand_value_return (result_rtl); | |
3057 | ||
3058 | /* If the result is an aggregate that is being returned in one (or more) | |
3059 | registers, load the registers here. */ | |
3060 | ||
3061 | else if (retval_rhs != 0 | |
3062 | && TYPE_MODE (TREE_TYPE (retval_rhs)) == BLKmode | |
3063 | && REG_P (result_rtl)) | |
3064 | { | |
3065 | val = copy_blkmode_to_reg (GET_MODE (result_rtl), retval_rhs); | |
3066 | if (val) | |
3067 | { | |
3068 | /* Use the mode of the result value on the return register. */ | |
3069 | PUT_MODE (result_rtl, GET_MODE (val)); | |
3070 | expand_value_return (val); | |
3071 | } | |
3072 | else | |
3073 | expand_null_return (); | |
3074 | } | |
3075 | else if (retval_rhs != 0 | |
3076 | && !VOID_TYPE_P (TREE_TYPE (retval_rhs)) | |
3077 | && (REG_P (result_rtl) | |
3078 | || (GET_CODE (result_rtl) == PARALLEL))) | |
3079 | { | |
3080 | /* Calculate the return value into a temporary (usually a pseudo | |
3081 | reg). */ | |
3082 | tree ot = TREE_TYPE (DECL_RESULT (current_function_decl)); | |
3083 | tree nt = build_qualified_type (ot, TYPE_QUALS (ot) | TYPE_QUAL_CONST); | |
3084 | ||
3085 | val = assign_temp (nt, 0, 1); | |
3086 | val = expand_expr (retval_rhs, val, GET_MODE (val), EXPAND_NORMAL); | |
3087 | val = force_not_mem (val); | |
3088 | /* Return the calculated value. */ | |
3089 | expand_value_return (val); | |
3090 | } | |
3091 | else | |
3092 | { | |
3093 | /* No hard reg used; calculate value into hard return reg. */ | |
3094 | expand_expr (retval, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3095 | expand_value_return (result_rtl); | |
3096 | } | |
3097 | } | |
3098 | ||
28ed065e MM |
3099 | /* A subroutine of expand_gimple_stmt, expanding one gimple statement |
3100 | STMT that doesn't require special handling for outgoing edges. That | |
3101 | is no tailcalls and no GIMPLE_COND. */ | |
3102 | ||
3103 | static void | |
3104 | expand_gimple_stmt_1 (gimple stmt) | |
3105 | { | |
3106 | tree op0; | |
c82fee88 | 3107 | |
5368224f | 3108 | set_curr_insn_location (gimple_location (stmt)); |
c82fee88 | 3109 | |
28ed065e MM |
3110 | switch (gimple_code (stmt)) |
3111 | { | |
3112 | case GIMPLE_GOTO: | |
3113 | op0 = gimple_goto_dest (stmt); | |
3114 | if (TREE_CODE (op0) == LABEL_DECL) | |
3115 | expand_goto (op0); | |
3116 | else | |
3117 | expand_computed_goto (op0); | |
3118 | break; | |
3119 | case GIMPLE_LABEL: | |
3120 | expand_label (gimple_label_label (stmt)); | |
3121 | break; | |
3122 | case GIMPLE_NOP: | |
3123 | case GIMPLE_PREDICT: | |
3124 | break; | |
28ed065e MM |
3125 | case GIMPLE_SWITCH: |
3126 | expand_case (stmt); | |
3127 | break; | |
3128 | case GIMPLE_ASM: | |
3129 | expand_asm_stmt (stmt); | |
3130 | break; | |
3131 | case GIMPLE_CALL: | |
3132 | expand_call_stmt (stmt); | |
3133 | break; | |
3134 | ||
3135 | case GIMPLE_RETURN: | |
3136 | op0 = gimple_return_retval (stmt); | |
3137 | ||
3138 | if (op0 && op0 != error_mark_node) | |
3139 | { | |
3140 | tree result = DECL_RESULT (current_function_decl); | |
3141 | ||
3142 | /* If we are not returning the current function's RESULT_DECL, | |
3143 | build an assignment to it. */ | |
3144 | if (op0 != result) | |
3145 | { | |
3146 | /* I believe that a function's RESULT_DECL is unique. */ | |
3147 | gcc_assert (TREE_CODE (op0) != RESULT_DECL); | |
3148 | ||
3149 | /* ??? We'd like to use simply expand_assignment here, | |
3150 | but this fails if the value is of BLKmode but the return | |
3151 | decl is a register. expand_return has special handling | |
3152 | for this combination, which eventually should move | |
3153 | to common code. See comments there. Until then, let's | |
3154 | build a modify expression :-/ */ | |
3155 | op0 = build2 (MODIFY_EXPR, TREE_TYPE (result), | |
3156 | result, op0); | |
3157 | } | |
3158 | } | |
3159 | if (!op0) | |
3160 | expand_null_return (); | |
3161 | else | |
3162 | expand_return (op0); | |
3163 | break; | |
3164 | ||
3165 | case GIMPLE_ASSIGN: | |
3166 | { | |
3167 | tree lhs = gimple_assign_lhs (stmt); | |
3168 | ||
3169 | /* Tree expand used to fiddle with |= and &= of two bitfield | |
3170 | COMPONENT_REFs here. This can't happen with gimple, the LHS | |
3171 | of binary assigns must be a gimple reg. */ | |
3172 | ||
3173 | if (TREE_CODE (lhs) != SSA_NAME | |
3174 | || get_gimple_rhs_class (gimple_expr_code (stmt)) | |
3175 | == GIMPLE_SINGLE_RHS) | |
3176 | { | |
3177 | tree rhs = gimple_assign_rhs1 (stmt); | |
3178 | gcc_assert (get_gimple_rhs_class (gimple_expr_code (stmt)) | |
3179 | == GIMPLE_SINGLE_RHS); | |
3180 | if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (rhs)) | |
3181 | SET_EXPR_LOCATION (rhs, gimple_location (stmt)); | |
47598145 MM |
3182 | if (TREE_CLOBBER_P (rhs)) |
3183 | /* This is a clobber to mark the going out of scope for | |
3184 | this LHS. */ | |
3185 | ; | |
3186 | else | |
3187 | expand_assignment (lhs, rhs, | |
3188 | gimple_assign_nontemporal_move_p (stmt)); | |
28ed065e MM |
3189 | } |
3190 | else | |
3191 | { | |
3192 | rtx target, temp; | |
3193 | bool nontemporal = gimple_assign_nontemporal_move_p (stmt); | |
3194 | struct separate_ops ops; | |
3195 | bool promoted = false; | |
3196 | ||
3197 | target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); | |
3198 | if (GET_CODE (target) == SUBREG && SUBREG_PROMOTED_VAR_P (target)) | |
3199 | promoted = true; | |
3200 | ||
3201 | ops.code = gimple_assign_rhs_code (stmt); | |
3202 | ops.type = TREE_TYPE (lhs); | |
3203 | switch (get_gimple_rhs_class (gimple_expr_code (stmt))) | |
3204 | { | |
0354c0c7 BS |
3205 | case GIMPLE_TERNARY_RHS: |
3206 | ops.op2 = gimple_assign_rhs3 (stmt); | |
3207 | /* Fallthru */ | |
28ed065e MM |
3208 | case GIMPLE_BINARY_RHS: |
3209 | ops.op1 = gimple_assign_rhs2 (stmt); | |
3210 | /* Fallthru */ | |
3211 | case GIMPLE_UNARY_RHS: | |
3212 | ops.op0 = gimple_assign_rhs1 (stmt); | |
3213 | break; | |
3214 | default: | |
3215 | gcc_unreachable (); | |
3216 | } | |
3217 | ops.location = gimple_location (stmt); | |
3218 | ||
3219 | /* If we want to use a nontemporal store, force the value to | |
3220 | register first. If we store into a promoted register, | |
3221 | don't directly expand to target. */ | |
3222 | temp = nontemporal || promoted ? NULL_RTX : target; | |
3223 | temp = expand_expr_real_2 (&ops, temp, GET_MODE (target), | |
3224 | EXPAND_NORMAL); | |
3225 | ||
3226 | if (temp == target) | |
3227 | ; | |
3228 | else if (promoted) | |
3229 | { | |
4e18a7d4 | 3230 | int unsignedp = SUBREG_PROMOTED_UNSIGNED_P (target); |
28ed065e MM |
3231 | /* If TEMP is a VOIDmode constant, use convert_modes to make |
3232 | sure that we properly convert it. */ | |
3233 | if (CONSTANT_P (temp) && GET_MODE (temp) == VOIDmode) | |
3234 | { | |
3235 | temp = convert_modes (GET_MODE (target), | |
3236 | TYPE_MODE (ops.type), | |
4e18a7d4 | 3237 | temp, unsignedp); |
28ed065e | 3238 | temp = convert_modes (GET_MODE (SUBREG_REG (target)), |
4e18a7d4 | 3239 | GET_MODE (target), temp, unsignedp); |
28ed065e MM |
3240 | } |
3241 | ||
4e18a7d4 | 3242 | convert_move (SUBREG_REG (target), temp, unsignedp); |
28ed065e MM |
3243 | } |
3244 | else if (nontemporal && emit_storent_insn (target, temp)) | |
3245 | ; | |
3246 | else | |
3247 | { | |
3248 | temp = force_operand (temp, target); | |
3249 | if (temp != target) | |
3250 | emit_move_insn (target, temp); | |
3251 | } | |
3252 | } | |
3253 | } | |
3254 | break; | |
3255 | ||
3256 | default: | |
3257 | gcc_unreachable (); | |
3258 | } | |
3259 | } | |
3260 | ||
3261 | /* Expand one gimple statement STMT and return the last RTL instruction | |
3262 | before any of the newly generated ones. | |
3263 | ||
3264 | In addition to generating the necessary RTL instructions this also | |
3265 | sets REG_EH_REGION notes if necessary and sets the current source | |
3266 | location for diagnostics. */ | |
3267 | ||
3268 | static rtx | |
3269 | expand_gimple_stmt (gimple stmt) | |
3270 | { | |
28ed065e | 3271 | location_t saved_location = input_location; |
c82fee88 EB |
3272 | rtx last = get_last_insn (); |
3273 | int lp_nr; | |
28ed065e | 3274 | |
28ed065e MM |
3275 | gcc_assert (cfun); |
3276 | ||
c82fee88 EB |
3277 | /* We need to save and restore the current source location so that errors |
3278 | discovered during expansion are emitted with the right location. But | |
3279 | it would be better if the diagnostic routines used the source location | |
3280 | embedded in the tree nodes rather than globals. */ | |
28ed065e | 3281 | if (gimple_has_location (stmt)) |
c82fee88 | 3282 | input_location = gimple_location (stmt); |
28ed065e MM |
3283 | |
3284 | expand_gimple_stmt_1 (stmt); | |
c82fee88 | 3285 | |
28ed065e MM |
3286 | /* Free any temporaries used to evaluate this statement. */ |
3287 | free_temp_slots (); | |
3288 | ||
3289 | input_location = saved_location; | |
3290 | ||
3291 | /* Mark all insns that may trap. */ | |
1d65f45c RH |
3292 | lp_nr = lookup_stmt_eh_lp (stmt); |
3293 | if (lp_nr) | |
28ed065e MM |
3294 | { |
3295 | rtx insn; | |
3296 | for (insn = next_real_insn (last); insn; | |
3297 | insn = next_real_insn (insn)) | |
3298 | { | |
3299 | if (! find_reg_note (insn, REG_EH_REGION, NULL_RTX) | |
3300 | /* If we want exceptions for non-call insns, any | |
3301 | may_trap_p instruction may throw. */ | |
3302 | && GET_CODE (PATTERN (insn)) != CLOBBER | |
3303 | && GET_CODE (PATTERN (insn)) != USE | |
1d65f45c RH |
3304 | && insn_could_throw_p (insn)) |
3305 | make_reg_eh_region_note (insn, 0, lp_nr); | |
28ed065e MM |
3306 | } |
3307 | } | |
3308 | ||
3309 | return last; | |
3310 | } | |
3311 | ||
726a989a | 3312 | /* A subroutine of expand_gimple_basic_block. Expand one GIMPLE_CALL |
224e770b RH |
3313 | that has CALL_EXPR_TAILCALL set. Returns non-null if we actually |
3314 | generated a tail call (something that might be denied by the ABI | |
cea49550 RH |
3315 | rules governing the call; see calls.c). |
3316 | ||
3317 | Sets CAN_FALLTHRU if we generated a *conditional* tail call, and | |
3318 | can still reach the rest of BB. The case here is __builtin_sqrt, | |
3319 | where the NaN result goes through the external function (with a | |
3320 | tailcall) and the normal result happens via a sqrt instruction. */ | |
80c7a9eb RH |
3321 | |
3322 | static basic_block | |
726a989a | 3323 | expand_gimple_tailcall (basic_block bb, gimple stmt, bool *can_fallthru) |
80c7a9eb | 3324 | { |
b7211528 | 3325 | rtx last2, last; |
224e770b | 3326 | edge e; |
628f6a4e | 3327 | edge_iterator ei; |
224e770b RH |
3328 | int probability; |
3329 | gcov_type count; | |
80c7a9eb | 3330 | |
28ed065e | 3331 | last2 = last = expand_gimple_stmt (stmt); |
80c7a9eb RH |
3332 | |
3333 | for (last = NEXT_INSN (last); last; last = NEXT_INSN (last)) | |
224e770b RH |
3334 | if (CALL_P (last) && SIBLING_CALL_P (last)) |
3335 | goto found; | |
80c7a9eb | 3336 | |
726a989a | 3337 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
b7211528 | 3338 | |
cea49550 | 3339 | *can_fallthru = true; |
224e770b | 3340 | return NULL; |
80c7a9eb | 3341 | |
224e770b RH |
3342 | found: |
3343 | /* ??? Wouldn't it be better to just reset any pending stack adjust? | |
3344 | Any instructions emitted here are about to be deleted. */ | |
3345 | do_pending_stack_adjust (); | |
3346 | ||
3347 | /* Remove any non-eh, non-abnormal edges that don't go to exit. */ | |
3348 | /* ??? I.e. the fallthrough edge. HOWEVER! If there were to be | |
3349 | EH or abnormal edges, we shouldn't have created a tail call in | |
3350 | the first place. So it seems to me we should just be removing | |
3351 | all edges here, or redirecting the existing fallthru edge to | |
3352 | the exit block. */ | |
3353 | ||
224e770b RH |
3354 | probability = 0; |
3355 | count = 0; | |
224e770b | 3356 | |
628f6a4e BE |
3357 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) |
3358 | { | |
224e770b RH |
3359 | if (!(e->flags & (EDGE_ABNORMAL | EDGE_EH))) |
3360 | { | |
3361 | if (e->dest != EXIT_BLOCK_PTR) | |
80c7a9eb | 3362 | { |
224e770b RH |
3363 | e->dest->count -= e->count; |
3364 | e->dest->frequency -= EDGE_FREQUENCY (e); | |
3365 | if (e->dest->count < 0) | |
c22cacf3 | 3366 | e->dest->count = 0; |
224e770b | 3367 | if (e->dest->frequency < 0) |
c22cacf3 | 3368 | e->dest->frequency = 0; |
80c7a9eb | 3369 | } |
224e770b RH |
3370 | count += e->count; |
3371 | probability += e->probability; | |
3372 | remove_edge (e); | |
80c7a9eb | 3373 | } |
628f6a4e BE |
3374 | else |
3375 | ei_next (&ei); | |
80c7a9eb RH |
3376 | } |
3377 | ||
224e770b RH |
3378 | /* This is somewhat ugly: the call_expr expander often emits instructions |
3379 | after the sibcall (to perform the function return). These confuse the | |
12eff7b7 | 3380 | find_many_sub_basic_blocks code, so we need to get rid of these. */ |
224e770b | 3381 | last = NEXT_INSN (last); |
341c100f | 3382 | gcc_assert (BARRIER_P (last)); |
cea49550 RH |
3383 | |
3384 | *can_fallthru = false; | |
224e770b RH |
3385 | while (NEXT_INSN (last)) |
3386 | { | |
3387 | /* For instance an sqrt builtin expander expands if with | |
3388 | sibcall in the then and label for `else`. */ | |
3389 | if (LABEL_P (NEXT_INSN (last))) | |
cea49550 RH |
3390 | { |
3391 | *can_fallthru = true; | |
3392 | break; | |
3393 | } | |
224e770b RH |
3394 | delete_insn (NEXT_INSN (last)); |
3395 | } | |
3396 | ||
3397 | e = make_edge (bb, EXIT_BLOCK_PTR, EDGE_ABNORMAL | EDGE_SIBCALL); | |
3398 | e->probability += probability; | |
3399 | e->count += count; | |
3400 | BB_END (bb) = last; | |
3401 | update_bb_for_insn (bb); | |
3402 | ||
3403 | if (NEXT_INSN (last)) | |
3404 | { | |
3405 | bb = create_basic_block (NEXT_INSN (last), get_last_insn (), bb); | |
3406 | ||
3407 | last = BB_END (bb); | |
3408 | if (BARRIER_P (last)) | |
3409 | BB_END (bb) = PREV_INSN (last); | |
3410 | } | |
3411 | ||
726a989a | 3412 | maybe_dump_rtl_for_gimple_stmt (stmt, last2); |
b7211528 | 3413 | |
224e770b | 3414 | return bb; |
80c7a9eb RH |
3415 | } |
3416 | ||
b5b8b0ac AO |
3417 | /* Return the difference between the floor and the truncated result of |
3418 | a signed division by OP1 with remainder MOD. */ | |
3419 | static rtx | |
3420 | floor_sdiv_adjust (enum machine_mode mode, rtx mod, rtx op1) | |
3421 | { | |
3422 | /* (mod != 0 ? (op1 / mod < 0 ? -1 : 0) : 0) */ | |
3423 | return gen_rtx_IF_THEN_ELSE | |
3424 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3425 | gen_rtx_IF_THEN_ELSE | |
3426 | (mode, gen_rtx_LT (BImode, | |
3427 | gen_rtx_DIV (mode, op1, mod), | |
3428 | const0_rtx), | |
3429 | constm1_rtx, const0_rtx), | |
3430 | const0_rtx); | |
3431 | } | |
3432 | ||
3433 | /* Return the difference between the ceil and the truncated result of | |
3434 | a signed division by OP1 with remainder MOD. */ | |
3435 | static rtx | |
3436 | ceil_sdiv_adjust (enum machine_mode mode, rtx mod, rtx op1) | |
3437 | { | |
3438 | /* (mod != 0 ? (op1 / mod > 0 ? 1 : 0) : 0) */ | |
3439 | return gen_rtx_IF_THEN_ELSE | |
3440 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3441 | gen_rtx_IF_THEN_ELSE | |
3442 | (mode, gen_rtx_GT (BImode, | |
3443 | gen_rtx_DIV (mode, op1, mod), | |
3444 | const0_rtx), | |
3445 | const1_rtx, const0_rtx), | |
3446 | const0_rtx); | |
3447 | } | |
3448 | ||
3449 | /* Return the difference between the ceil and the truncated result of | |
3450 | an unsigned division by OP1 with remainder MOD. */ | |
3451 | static rtx | |
3452 | ceil_udiv_adjust (enum machine_mode mode, rtx mod, rtx op1 ATTRIBUTE_UNUSED) | |
3453 | { | |
3454 | /* (mod != 0 ? 1 : 0) */ | |
3455 | return gen_rtx_IF_THEN_ELSE | |
3456 | (mode, gen_rtx_NE (BImode, mod, const0_rtx), | |
3457 | const1_rtx, const0_rtx); | |
3458 | } | |
3459 | ||
3460 | /* Return the difference between the rounded and the truncated result | |
3461 | of a signed division by OP1 with remainder MOD. Halfway cases are | |
3462 | rounded away from zero, rather than to the nearest even number. */ | |
3463 | static rtx | |
3464 | round_sdiv_adjust (enum machine_mode mode, rtx mod, rtx op1) | |
3465 | { | |
3466 | /* (abs (mod) >= abs (op1) - abs (mod) | |
3467 | ? (op1 / mod > 0 ? 1 : -1) | |
3468 | : 0) */ | |
3469 | return gen_rtx_IF_THEN_ELSE | |
3470 | (mode, gen_rtx_GE (BImode, gen_rtx_ABS (mode, mod), | |
3471 | gen_rtx_MINUS (mode, | |
3472 | gen_rtx_ABS (mode, op1), | |
3473 | gen_rtx_ABS (mode, mod))), | |
3474 | gen_rtx_IF_THEN_ELSE | |
3475 | (mode, gen_rtx_GT (BImode, | |
3476 | gen_rtx_DIV (mode, op1, mod), | |
3477 | const0_rtx), | |
3478 | const1_rtx, constm1_rtx), | |
3479 | const0_rtx); | |
3480 | } | |
3481 | ||
3482 | /* Return the difference between the rounded and the truncated result | |
3483 | of a unsigned division by OP1 with remainder MOD. Halfway cases | |
3484 | are rounded away from zero, rather than to the nearest even | |
3485 | number. */ | |
3486 | static rtx | |
3487 | round_udiv_adjust (enum machine_mode mode, rtx mod, rtx op1) | |
3488 | { | |
3489 | /* (mod >= op1 - mod ? 1 : 0) */ | |
3490 | return gen_rtx_IF_THEN_ELSE | |
3491 | (mode, gen_rtx_GE (BImode, mod, | |
3492 | gen_rtx_MINUS (mode, op1, mod)), | |
3493 | const1_rtx, const0_rtx); | |
3494 | } | |
3495 | ||
dda2da58 AO |
3496 | /* Convert X to MODE, that must be Pmode or ptr_mode, without emitting |
3497 | any rtl. */ | |
3498 | ||
3499 | static rtx | |
f61c6f34 JJ |
3500 | convert_debug_memory_address (enum machine_mode mode, rtx x, |
3501 | addr_space_t as) | |
dda2da58 AO |
3502 | { |
3503 | enum machine_mode xmode = GET_MODE (x); | |
3504 | ||
3505 | #ifndef POINTERS_EXTEND_UNSIGNED | |
f61c6f34 JJ |
3506 | gcc_assert (mode == Pmode |
3507 | || mode == targetm.addr_space.address_mode (as)); | |
dda2da58 AO |
3508 | gcc_assert (xmode == mode || xmode == VOIDmode); |
3509 | #else | |
f61c6f34 | 3510 | rtx temp; |
f61c6f34 | 3511 | |
639d4bb8 | 3512 | gcc_assert (targetm.addr_space.valid_pointer_mode (mode, as)); |
dda2da58 AO |
3513 | |
3514 | if (GET_MODE (x) == mode || GET_MODE (x) == VOIDmode) | |
3515 | return x; | |
3516 | ||
69660a70 | 3517 | if (GET_MODE_PRECISION (mode) < GET_MODE_PRECISION (xmode)) |
dda2da58 AO |
3518 | x = simplify_gen_subreg (mode, x, xmode, |
3519 | subreg_lowpart_offset | |
3520 | (mode, xmode)); | |
3521 | else if (POINTERS_EXTEND_UNSIGNED > 0) | |
3522 | x = gen_rtx_ZERO_EXTEND (mode, x); | |
3523 | else if (!POINTERS_EXTEND_UNSIGNED) | |
3524 | x = gen_rtx_SIGN_EXTEND (mode, x); | |
3525 | else | |
f61c6f34 JJ |
3526 | { |
3527 | switch (GET_CODE (x)) | |
3528 | { | |
3529 | case SUBREG: | |
3530 | if ((SUBREG_PROMOTED_VAR_P (x) | |
3531 | || (REG_P (SUBREG_REG (x)) && REG_POINTER (SUBREG_REG (x))) | |
3532 | || (GET_CODE (SUBREG_REG (x)) == PLUS | |
3533 | && REG_P (XEXP (SUBREG_REG (x), 0)) | |
3534 | && REG_POINTER (XEXP (SUBREG_REG (x), 0)) | |
3535 | && CONST_INT_P (XEXP (SUBREG_REG (x), 1)))) | |
3536 | && GET_MODE (SUBREG_REG (x)) == mode) | |
3537 | return SUBREG_REG (x); | |
3538 | break; | |
3539 | case LABEL_REF: | |
3540 | temp = gen_rtx_LABEL_REF (mode, XEXP (x, 0)); | |
3541 | LABEL_REF_NONLOCAL_P (temp) = LABEL_REF_NONLOCAL_P (x); | |
3542 | return temp; | |
3543 | case SYMBOL_REF: | |
3544 | temp = shallow_copy_rtx (x); | |
3545 | PUT_MODE (temp, mode); | |
3546 | return temp; | |
3547 | case CONST: | |
3548 | temp = convert_debug_memory_address (mode, XEXP (x, 0), as); | |
3549 | if (temp) | |
3550 | temp = gen_rtx_CONST (mode, temp); | |
3551 | return temp; | |
3552 | case PLUS: | |
3553 | case MINUS: | |
3554 | if (CONST_INT_P (XEXP (x, 1))) | |
3555 | { | |
3556 | temp = convert_debug_memory_address (mode, XEXP (x, 0), as); | |
3557 | if (temp) | |
3558 | return gen_rtx_fmt_ee (GET_CODE (x), mode, temp, XEXP (x, 1)); | |
3559 | } | |
3560 | break; | |
3561 | default: | |
3562 | break; | |
3563 | } | |
3564 | /* Don't know how to express ptr_extend as operation in debug info. */ | |
3565 | return NULL; | |
3566 | } | |
dda2da58 AO |
3567 | #endif /* POINTERS_EXTEND_UNSIGNED */ |
3568 | ||
3569 | return x; | |
3570 | } | |
3571 | ||
12c5ffe5 EB |
3572 | /* Return an RTX equivalent to the value of the parameter DECL. */ |
3573 | ||
3574 | static rtx | |
3575 | expand_debug_parm_decl (tree decl) | |
3576 | { | |
3577 | rtx incoming = DECL_INCOMING_RTL (decl); | |
3578 | ||
3579 | if (incoming | |
3580 | && GET_MODE (incoming) != BLKmode | |
3581 | && ((REG_P (incoming) && HARD_REGISTER_P (incoming)) | |
3582 | || (MEM_P (incoming) | |
3583 | && REG_P (XEXP (incoming, 0)) | |
3584 | && HARD_REGISTER_P (XEXP (incoming, 0))))) | |
3585 | { | |
3586 | rtx rtl = gen_rtx_ENTRY_VALUE (GET_MODE (incoming)); | |
3587 | ||
3588 | #ifdef HAVE_window_save | |
3589 | /* DECL_INCOMING_RTL uses the INCOMING_REGNO of parameter registers. | |
3590 | If the target machine has an explicit window save instruction, the | |
3591 | actual entry value is the corresponding OUTGOING_REGNO instead. */ | |
3592 | if (REG_P (incoming) | |
3593 | && OUTGOING_REGNO (REGNO (incoming)) != REGNO (incoming)) | |
3594 | incoming | |
3595 | = gen_rtx_REG_offset (incoming, GET_MODE (incoming), | |
3596 | OUTGOING_REGNO (REGNO (incoming)), 0); | |
3597 | else if (MEM_P (incoming)) | |
3598 | { | |
3599 | rtx reg = XEXP (incoming, 0); | |
3600 | if (OUTGOING_REGNO (REGNO (reg)) != REGNO (reg)) | |
3601 | { | |
3602 | reg = gen_raw_REG (GET_MODE (reg), OUTGOING_REGNO (REGNO (reg))); | |
3603 | incoming = replace_equiv_address_nv (incoming, reg); | |
3604 | } | |
6cfa417f JJ |
3605 | else |
3606 | incoming = copy_rtx (incoming); | |
12c5ffe5 EB |
3607 | } |
3608 | #endif | |
3609 | ||
3610 | ENTRY_VALUE_EXP (rtl) = incoming; | |
3611 | return rtl; | |
3612 | } | |
3613 | ||
3614 | if (incoming | |
3615 | && GET_MODE (incoming) != BLKmode | |
3616 | && !TREE_ADDRESSABLE (decl) | |
3617 | && MEM_P (incoming) | |
3618 | && (XEXP (incoming, 0) == virtual_incoming_args_rtx | |
3619 | || (GET_CODE (XEXP (incoming, 0)) == PLUS | |
3620 | && XEXP (XEXP (incoming, 0), 0) == virtual_incoming_args_rtx | |
3621 | && CONST_INT_P (XEXP (XEXP (incoming, 0), 1))))) | |
6cfa417f | 3622 | return copy_rtx (incoming); |
12c5ffe5 EB |
3623 | |
3624 | return NULL_RTX; | |
3625 | } | |
3626 | ||
3627 | /* Return an RTX equivalent to the value of the tree expression EXP. */ | |
b5b8b0ac AO |
3628 | |
3629 | static rtx | |
3630 | expand_debug_expr (tree exp) | |
3631 | { | |
3632 | rtx op0 = NULL_RTX, op1 = NULL_RTX, op2 = NULL_RTX; | |
3633 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); | |
2ba172e0 | 3634 | enum machine_mode inner_mode = VOIDmode; |
b5b8b0ac | 3635 | int unsignedp = TYPE_UNSIGNED (TREE_TYPE (exp)); |
09e881c9 | 3636 | addr_space_t as; |
b5b8b0ac AO |
3637 | |
3638 | switch (TREE_CODE_CLASS (TREE_CODE (exp))) | |
3639 | { | |
3640 | case tcc_expression: | |
3641 | switch (TREE_CODE (exp)) | |
3642 | { | |
3643 | case COND_EXPR: | |
7ece48b1 | 3644 | case DOT_PROD_EXPR: |
0354c0c7 BS |
3645 | case WIDEN_MULT_PLUS_EXPR: |
3646 | case WIDEN_MULT_MINUS_EXPR: | |
0f59b812 | 3647 | case FMA_EXPR: |
b5b8b0ac AO |
3648 | goto ternary; |
3649 | ||
3650 | case TRUTH_ANDIF_EXPR: | |
3651 | case TRUTH_ORIF_EXPR: | |
3652 | case TRUTH_AND_EXPR: | |
3653 | case TRUTH_OR_EXPR: | |
3654 | case TRUTH_XOR_EXPR: | |
3655 | goto binary; | |
3656 | ||
3657 | case TRUTH_NOT_EXPR: | |
3658 | goto unary; | |
3659 | ||
3660 | default: | |
3661 | break; | |
3662 | } | |
3663 | break; | |
3664 | ||
3665 | ternary: | |
3666 | op2 = expand_debug_expr (TREE_OPERAND (exp, 2)); | |
3667 | if (!op2) | |
3668 | return NULL_RTX; | |
3669 | /* Fall through. */ | |
3670 | ||
3671 | binary: | |
3672 | case tcc_binary: | |
3673 | case tcc_comparison: | |
3674 | op1 = expand_debug_expr (TREE_OPERAND (exp, 1)); | |
3675 | if (!op1) | |
3676 | return NULL_RTX; | |
3677 | /* Fall through. */ | |
3678 | ||
3679 | unary: | |
3680 | case tcc_unary: | |
2ba172e0 | 3681 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); |
b5b8b0ac AO |
3682 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); |
3683 | if (!op0) | |
3684 | return NULL_RTX; | |
3685 | break; | |
3686 | ||
3687 | case tcc_type: | |
3688 | case tcc_statement: | |
3689 | gcc_unreachable (); | |
3690 | ||
3691 | case tcc_constant: | |
3692 | case tcc_exceptional: | |
3693 | case tcc_declaration: | |
3694 | case tcc_reference: | |
3695 | case tcc_vl_exp: | |
3696 | break; | |
3697 | } | |
3698 | ||
3699 | switch (TREE_CODE (exp)) | |
3700 | { | |
3701 | case STRING_CST: | |
3702 | if (!lookup_constant_def (exp)) | |
3703 | { | |
e1b243a8 JJ |
3704 | if (strlen (TREE_STRING_POINTER (exp)) + 1 |
3705 | != (size_t) TREE_STRING_LENGTH (exp)) | |
3706 | return NULL_RTX; | |
b5b8b0ac AO |
3707 | op0 = gen_rtx_CONST_STRING (Pmode, TREE_STRING_POINTER (exp)); |
3708 | op0 = gen_rtx_MEM (BLKmode, op0); | |
3709 | set_mem_attributes (op0, exp, 0); | |
3710 | return op0; | |
3711 | } | |
3712 | /* Fall through... */ | |
3713 | ||
3714 | case INTEGER_CST: | |
3715 | case REAL_CST: | |
3716 | case FIXED_CST: | |
3717 | op0 = expand_expr (exp, NULL_RTX, mode, EXPAND_INITIALIZER); | |
3718 | return op0; | |
3719 | ||
3720 | case COMPLEX_CST: | |
3721 | gcc_assert (COMPLEX_MODE_P (mode)); | |
3722 | op0 = expand_debug_expr (TREE_REALPART (exp)); | |
b5b8b0ac | 3723 | op1 = expand_debug_expr (TREE_IMAGPART (exp)); |
b5b8b0ac AO |
3724 | return gen_rtx_CONCAT (mode, op0, op1); |
3725 | ||
0ca5af51 AO |
3726 | case DEBUG_EXPR_DECL: |
3727 | op0 = DECL_RTL_IF_SET (exp); | |
3728 | ||
3729 | if (op0) | |
3730 | return op0; | |
3731 | ||
3732 | op0 = gen_rtx_DEBUG_EXPR (mode); | |
e4fb38bd | 3733 | DEBUG_EXPR_TREE_DECL (op0) = exp; |
0ca5af51 AO |
3734 | SET_DECL_RTL (exp, op0); |
3735 | ||
3736 | return op0; | |
3737 | ||
b5b8b0ac AO |
3738 | case VAR_DECL: |
3739 | case PARM_DECL: | |
3740 | case FUNCTION_DECL: | |
3741 | case LABEL_DECL: | |
3742 | case CONST_DECL: | |
3743 | case RESULT_DECL: | |
3744 | op0 = DECL_RTL_IF_SET (exp); | |
3745 | ||
3746 | /* This decl was probably optimized away. */ | |
3747 | if (!op0) | |
e1b243a8 JJ |
3748 | { |
3749 | if (TREE_CODE (exp) != VAR_DECL | |
3750 | || DECL_EXTERNAL (exp) | |
3751 | || !TREE_STATIC (exp) | |
3752 | || !DECL_NAME (exp) | |
0fba566c | 3753 | || DECL_HARD_REGISTER (exp) |
7d5fc814 | 3754 | || DECL_IN_CONSTANT_POOL (exp) |
0fba566c | 3755 | || mode == VOIDmode) |
e1b243a8 JJ |
3756 | return NULL; |
3757 | ||
b1aa0655 | 3758 | op0 = make_decl_rtl_for_debug (exp); |
e1b243a8 JJ |
3759 | if (!MEM_P (op0) |
3760 | || GET_CODE (XEXP (op0, 0)) != SYMBOL_REF | |
3761 | || SYMBOL_REF_DECL (XEXP (op0, 0)) != exp) | |
3762 | return NULL; | |
3763 | } | |
3764 | else | |
3765 | op0 = copy_rtx (op0); | |
b5b8b0ac | 3766 | |
06796564 JJ |
3767 | if (GET_MODE (op0) == BLKmode |
3768 | /* If op0 is not BLKmode, but BLKmode is, adjust_mode | |
3769 | below would ICE. While it is likely a FE bug, | |
3770 | try to be robust here. See PR43166. */ | |
132b4e82 JJ |
3771 | || mode == BLKmode |
3772 | || (mode == VOIDmode && GET_MODE (op0) != VOIDmode)) | |
b5b8b0ac AO |
3773 | { |
3774 | gcc_assert (MEM_P (op0)); | |
3775 | op0 = adjust_address_nv (op0, mode, 0); | |
3776 | return op0; | |
3777 | } | |
3778 | ||
3779 | /* Fall through. */ | |
3780 | ||
3781 | adjust_mode: | |
3782 | case PAREN_EXPR: | |
3783 | case NOP_EXPR: | |
3784 | case CONVERT_EXPR: | |
3785 | { | |
2ba172e0 | 3786 | inner_mode = GET_MODE (op0); |
b5b8b0ac AO |
3787 | |
3788 | if (mode == inner_mode) | |
3789 | return op0; | |
3790 | ||
3791 | if (inner_mode == VOIDmode) | |
3792 | { | |
2a8e30fb MM |
3793 | if (TREE_CODE (exp) == SSA_NAME) |
3794 | inner_mode = TYPE_MODE (TREE_TYPE (exp)); | |
3795 | else | |
3796 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
b5b8b0ac AO |
3797 | if (mode == inner_mode) |
3798 | return op0; | |
3799 | } | |
3800 | ||
3801 | if (FLOAT_MODE_P (mode) && FLOAT_MODE_P (inner_mode)) | |
3802 | { | |
3803 | if (GET_MODE_BITSIZE (mode) == GET_MODE_BITSIZE (inner_mode)) | |
3804 | op0 = simplify_gen_subreg (mode, op0, inner_mode, 0); | |
3805 | else if (GET_MODE_BITSIZE (mode) < GET_MODE_BITSIZE (inner_mode)) | |
3806 | op0 = simplify_gen_unary (FLOAT_TRUNCATE, mode, op0, inner_mode); | |
3807 | else | |
3808 | op0 = simplify_gen_unary (FLOAT_EXTEND, mode, op0, inner_mode); | |
3809 | } | |
3810 | else if (FLOAT_MODE_P (mode)) | |
3811 | { | |
2a8e30fb | 3812 | gcc_assert (TREE_CODE (exp) != SSA_NAME); |
b5b8b0ac AO |
3813 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
3814 | op0 = simplify_gen_unary (UNSIGNED_FLOAT, mode, op0, inner_mode); | |
3815 | else | |
3816 | op0 = simplify_gen_unary (FLOAT, mode, op0, inner_mode); | |
3817 | } | |
3818 | else if (FLOAT_MODE_P (inner_mode)) | |
3819 | { | |
3820 | if (unsignedp) | |
3821 | op0 = simplify_gen_unary (UNSIGNED_FIX, mode, op0, inner_mode); | |
3822 | else | |
3823 | op0 = simplify_gen_unary (FIX, mode, op0, inner_mode); | |
3824 | } | |
3825 | else if (CONSTANT_P (op0) | |
69660a70 | 3826 | || GET_MODE_PRECISION (mode) <= GET_MODE_PRECISION (inner_mode)) |
b5b8b0ac AO |
3827 | op0 = simplify_gen_subreg (mode, op0, inner_mode, |
3828 | subreg_lowpart_offset (mode, | |
3829 | inner_mode)); | |
1b47fe3f JJ |
3830 | else if (TREE_CODE_CLASS (TREE_CODE (exp)) == tcc_unary |
3831 | ? TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))) | |
3832 | : unsignedp) | |
2ba172e0 | 3833 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); |
b5b8b0ac | 3834 | else |
2ba172e0 | 3835 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); |
b5b8b0ac AO |
3836 | |
3837 | return op0; | |
3838 | } | |
3839 | ||
70f34814 | 3840 | case MEM_REF: |
71f3a3f5 JJ |
3841 | if (!is_gimple_mem_ref_addr (TREE_OPERAND (exp, 0))) |
3842 | { | |
3843 | tree newexp = fold_binary (MEM_REF, TREE_TYPE (exp), | |
3844 | TREE_OPERAND (exp, 0), | |
3845 | TREE_OPERAND (exp, 1)); | |
3846 | if (newexp) | |
3847 | return expand_debug_expr (newexp); | |
3848 | } | |
3849 | /* FALLTHROUGH */ | |
b5b8b0ac | 3850 | case INDIRECT_REF: |
0a81f074 | 3851 | inner_mode = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); |
b5b8b0ac AO |
3852 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); |
3853 | if (!op0) | |
3854 | return NULL; | |
3855 | ||
cb115041 JJ |
3856 | if (TREE_CODE (exp) == MEM_REF) |
3857 | { | |
583ac69c JJ |
3858 | if (GET_CODE (op0) == DEBUG_IMPLICIT_PTR |
3859 | || (GET_CODE (op0) == PLUS | |
3860 | && GET_CODE (XEXP (op0, 0)) == DEBUG_IMPLICIT_PTR)) | |
3861 | /* (mem (debug_implicit_ptr)) might confuse aliasing. | |
3862 | Instead just use get_inner_reference. */ | |
3863 | goto component_ref; | |
3864 | ||
cb115041 JJ |
3865 | op1 = expand_debug_expr (TREE_OPERAND (exp, 1)); |
3866 | if (!op1 || !CONST_INT_P (op1)) | |
3867 | return NULL; | |
3868 | ||
0a81f074 | 3869 | op0 = plus_constant (inner_mode, op0, INTVAL (op1)); |
cb115041 JJ |
3870 | } |
3871 | ||
09e881c9 | 3872 | if (POINTER_TYPE_P (TREE_TYPE (exp))) |
75421dcd | 3873 | as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp))); |
09e881c9 | 3874 | else |
75421dcd | 3875 | as = ADDR_SPACE_GENERIC; |
b5b8b0ac | 3876 | |
f61c6f34 JJ |
3877 | op0 = convert_debug_memory_address (targetm.addr_space.address_mode (as), |
3878 | op0, as); | |
3879 | if (op0 == NULL_RTX) | |
3880 | return NULL; | |
b5b8b0ac | 3881 | |
f61c6f34 | 3882 | op0 = gen_rtx_MEM (mode, op0); |
b5b8b0ac | 3883 | set_mem_attributes (op0, exp, 0); |
71f3a3f5 JJ |
3884 | if (TREE_CODE (exp) == MEM_REF |
3885 | && !is_gimple_mem_ref_addr (TREE_OPERAND (exp, 0))) | |
3886 | set_mem_expr (op0, NULL_TREE); | |
09e881c9 | 3887 | set_mem_addr_space (op0, as); |
b5b8b0ac AO |
3888 | |
3889 | return op0; | |
3890 | ||
3891 | case TARGET_MEM_REF: | |
4d948885 RG |
3892 | if (TREE_CODE (TMR_BASE (exp)) == ADDR_EXPR |
3893 | && !DECL_RTL_SET_P (TREE_OPERAND (TMR_BASE (exp), 0))) | |
b5b8b0ac AO |
3894 | return NULL; |
3895 | ||
3896 | op0 = expand_debug_expr | |
4e25ca6b | 3897 | (tree_mem_ref_addr (build_pointer_type (TREE_TYPE (exp)), exp)); |
b5b8b0ac AO |
3898 | if (!op0) |
3899 | return NULL; | |
3900 | ||
f61c6f34 JJ |
3901 | if (POINTER_TYPE_P (TREE_TYPE (exp))) |
3902 | as = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp))); | |
3903 | else | |
3904 | as = ADDR_SPACE_GENERIC; | |
3905 | ||
3906 | op0 = convert_debug_memory_address (targetm.addr_space.address_mode (as), | |
3907 | op0, as); | |
3908 | if (op0 == NULL_RTX) | |
3909 | return NULL; | |
b5b8b0ac AO |
3910 | |
3911 | op0 = gen_rtx_MEM (mode, op0); | |
3912 | ||
3913 | set_mem_attributes (op0, exp, 0); | |
09e881c9 | 3914 | set_mem_addr_space (op0, as); |
b5b8b0ac AO |
3915 | |
3916 | return op0; | |
3917 | ||
583ac69c | 3918 | component_ref: |
b5b8b0ac AO |
3919 | case ARRAY_REF: |
3920 | case ARRAY_RANGE_REF: | |
3921 | case COMPONENT_REF: | |
3922 | case BIT_FIELD_REF: | |
3923 | case REALPART_EXPR: | |
3924 | case IMAGPART_EXPR: | |
3925 | case VIEW_CONVERT_EXPR: | |
3926 | { | |
3927 | enum machine_mode mode1; | |
3928 | HOST_WIDE_INT bitsize, bitpos; | |
3929 | tree offset; | |
3930 | int volatilep = 0; | |
3931 | tree tem = get_inner_reference (exp, &bitsize, &bitpos, &offset, | |
3932 | &mode1, &unsignedp, &volatilep, false); | |
3933 | rtx orig_op0; | |
3934 | ||
4f2a9af8 JJ |
3935 | if (bitsize == 0) |
3936 | return NULL; | |
3937 | ||
b5b8b0ac AO |
3938 | orig_op0 = op0 = expand_debug_expr (tem); |
3939 | ||
3940 | if (!op0) | |
3941 | return NULL; | |
3942 | ||
3943 | if (offset) | |
3944 | { | |
dda2da58 AO |
3945 | enum machine_mode addrmode, offmode; |
3946 | ||
aa847cc8 JJ |
3947 | if (!MEM_P (op0)) |
3948 | return NULL; | |
b5b8b0ac | 3949 | |
dda2da58 AO |
3950 | op0 = XEXP (op0, 0); |
3951 | addrmode = GET_MODE (op0); | |
3952 | if (addrmode == VOIDmode) | |
3953 | addrmode = Pmode; | |
3954 | ||
b5b8b0ac AO |
3955 | op1 = expand_debug_expr (offset); |
3956 | if (!op1) | |
3957 | return NULL; | |
3958 | ||
dda2da58 AO |
3959 | offmode = GET_MODE (op1); |
3960 | if (offmode == VOIDmode) | |
3961 | offmode = TYPE_MODE (TREE_TYPE (offset)); | |
3962 | ||
3963 | if (addrmode != offmode) | |
3964 | op1 = simplify_gen_subreg (addrmode, op1, offmode, | |
3965 | subreg_lowpart_offset (addrmode, | |
3966 | offmode)); | |
3967 | ||
3968 | /* Don't use offset_address here, we don't need a | |
3969 | recognizable address, and we don't want to generate | |
3970 | code. */ | |
2ba172e0 JJ |
3971 | op0 = gen_rtx_MEM (mode, simplify_gen_binary (PLUS, addrmode, |
3972 | op0, op1)); | |
b5b8b0ac AO |
3973 | } |
3974 | ||
3975 | if (MEM_P (op0)) | |
3976 | { | |
4f2a9af8 JJ |
3977 | if (mode1 == VOIDmode) |
3978 | /* Bitfield. */ | |
3979 | mode1 = smallest_mode_for_size (bitsize, MODE_INT); | |
b5b8b0ac AO |
3980 | if (bitpos >= BITS_PER_UNIT) |
3981 | { | |
3982 | op0 = adjust_address_nv (op0, mode1, bitpos / BITS_PER_UNIT); | |
3983 | bitpos %= BITS_PER_UNIT; | |
3984 | } | |
3985 | else if (bitpos < 0) | |
3986 | { | |
4f2a9af8 JJ |
3987 | HOST_WIDE_INT units |
3988 | = (-bitpos + BITS_PER_UNIT - 1) / BITS_PER_UNIT; | |
b5b8b0ac AO |
3989 | op0 = adjust_address_nv (op0, mode1, units); |
3990 | bitpos += units * BITS_PER_UNIT; | |
3991 | } | |
3992 | else if (bitpos == 0 && bitsize == GET_MODE_BITSIZE (mode)) | |
3993 | op0 = adjust_address_nv (op0, mode, 0); | |
3994 | else if (GET_MODE (op0) != mode1) | |
3995 | op0 = adjust_address_nv (op0, mode1, 0); | |
3996 | else | |
3997 | op0 = copy_rtx (op0); | |
3998 | if (op0 == orig_op0) | |
3999 | op0 = shallow_copy_rtx (op0); | |
4000 | set_mem_attributes (op0, exp, 0); | |
4001 | } | |
4002 | ||
4003 | if (bitpos == 0 && mode == GET_MODE (op0)) | |
4004 | return op0; | |
4005 | ||
2d3fc6aa JJ |
4006 | if (bitpos < 0) |
4007 | return NULL; | |
4008 | ||
88c04a5d JJ |
4009 | if (GET_MODE (op0) == BLKmode) |
4010 | return NULL; | |
4011 | ||
b5b8b0ac AO |
4012 | if ((bitpos % BITS_PER_UNIT) == 0 |
4013 | && bitsize == GET_MODE_BITSIZE (mode1)) | |
4014 | { | |
4015 | enum machine_mode opmode = GET_MODE (op0); | |
4016 | ||
b5b8b0ac | 4017 | if (opmode == VOIDmode) |
9712cba0 | 4018 | opmode = TYPE_MODE (TREE_TYPE (tem)); |
b5b8b0ac AO |
4019 | |
4020 | /* This condition may hold if we're expanding the address | |
4021 | right past the end of an array that turned out not to | |
4022 | be addressable (i.e., the address was only computed in | |
4023 | debug stmts). The gen_subreg below would rightfully | |
4024 | crash, and the address doesn't really exist, so just | |
4025 | drop it. */ | |
4026 | if (bitpos >= GET_MODE_BITSIZE (opmode)) | |
4027 | return NULL; | |
4028 | ||
7d5d39bb JJ |
4029 | if ((bitpos % GET_MODE_BITSIZE (mode)) == 0) |
4030 | return simplify_gen_subreg (mode, op0, opmode, | |
4031 | bitpos / BITS_PER_UNIT); | |
b5b8b0ac AO |
4032 | } |
4033 | ||
4034 | return simplify_gen_ternary (SCALAR_INT_MODE_P (GET_MODE (op0)) | |
4035 | && TYPE_UNSIGNED (TREE_TYPE (exp)) | |
4036 | ? SIGN_EXTRACT | |
4037 | : ZERO_EXTRACT, mode, | |
4038 | GET_MODE (op0) != VOIDmode | |
9712cba0 JJ |
4039 | ? GET_MODE (op0) |
4040 | : TYPE_MODE (TREE_TYPE (tem)), | |
b5b8b0ac AO |
4041 | op0, GEN_INT (bitsize), GEN_INT (bitpos)); |
4042 | } | |
4043 | ||
b5b8b0ac | 4044 | case ABS_EXPR: |
2ba172e0 | 4045 | return simplify_gen_unary (ABS, mode, op0, mode); |
b5b8b0ac AO |
4046 | |
4047 | case NEGATE_EXPR: | |
2ba172e0 | 4048 | return simplify_gen_unary (NEG, mode, op0, mode); |
b5b8b0ac AO |
4049 | |
4050 | case BIT_NOT_EXPR: | |
2ba172e0 | 4051 | return simplify_gen_unary (NOT, mode, op0, mode); |
b5b8b0ac AO |
4052 | |
4053 | case FLOAT_EXPR: | |
2ba172e0 JJ |
4054 | return simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, |
4055 | 0))) | |
4056 | ? UNSIGNED_FLOAT : FLOAT, mode, op0, | |
4057 | inner_mode); | |
b5b8b0ac AO |
4058 | |
4059 | case FIX_TRUNC_EXPR: | |
2ba172e0 JJ |
4060 | return simplify_gen_unary (unsignedp ? UNSIGNED_FIX : FIX, mode, op0, |
4061 | inner_mode); | |
b5b8b0ac AO |
4062 | |
4063 | case POINTER_PLUS_EXPR: | |
576319a7 DD |
4064 | /* For the rare target where pointers are not the same size as |
4065 | size_t, we need to check for mis-matched modes and correct | |
4066 | the addend. */ | |
4067 | if (op0 && op1 | |
4068 | && GET_MODE (op0) != VOIDmode && GET_MODE (op1) != VOIDmode | |
4069 | && GET_MODE (op0) != GET_MODE (op1)) | |
4070 | { | |
8369f38a DD |
4071 | if (GET_MODE_BITSIZE (GET_MODE (op0)) < GET_MODE_BITSIZE (GET_MODE (op1)) |
4072 | /* If OP0 is a partial mode, then we must truncate, even if it has | |
4073 | the same bitsize as OP1 as GCC's representation of partial modes | |
4074 | is opaque. */ | |
4075 | || (GET_MODE_CLASS (GET_MODE (op0)) == MODE_PARTIAL_INT | |
4076 | && GET_MODE_BITSIZE (GET_MODE (op0)) == GET_MODE_BITSIZE (GET_MODE (op1)))) | |
2ba172e0 JJ |
4077 | op1 = simplify_gen_unary (TRUNCATE, GET_MODE (op0), op1, |
4078 | GET_MODE (op1)); | |
576319a7 DD |
4079 | else |
4080 | /* We always sign-extend, regardless of the signedness of | |
4081 | the operand, because the operand is always unsigned | |
4082 | here even if the original C expression is signed. */ | |
2ba172e0 JJ |
4083 | op1 = simplify_gen_unary (SIGN_EXTEND, GET_MODE (op0), op1, |
4084 | GET_MODE (op1)); | |
576319a7 DD |
4085 | } |
4086 | /* Fall through. */ | |
b5b8b0ac | 4087 | case PLUS_EXPR: |
2ba172e0 | 4088 | return simplify_gen_binary (PLUS, mode, op0, op1); |
b5b8b0ac AO |
4089 | |
4090 | case MINUS_EXPR: | |
2ba172e0 | 4091 | return simplify_gen_binary (MINUS, mode, op0, op1); |
b5b8b0ac AO |
4092 | |
4093 | case MULT_EXPR: | |
2ba172e0 | 4094 | return simplify_gen_binary (MULT, mode, op0, op1); |
b5b8b0ac AO |
4095 | |
4096 | case RDIV_EXPR: | |
4097 | case TRUNC_DIV_EXPR: | |
4098 | case EXACT_DIV_EXPR: | |
4099 | if (unsignedp) | |
2ba172e0 | 4100 | return simplify_gen_binary (UDIV, mode, op0, op1); |
b5b8b0ac | 4101 | else |
2ba172e0 | 4102 | return simplify_gen_binary (DIV, mode, op0, op1); |
b5b8b0ac AO |
4103 | |
4104 | case TRUNC_MOD_EXPR: | |
2ba172e0 | 4105 | return simplify_gen_binary (unsignedp ? UMOD : MOD, mode, op0, op1); |
b5b8b0ac AO |
4106 | |
4107 | case FLOOR_DIV_EXPR: | |
4108 | if (unsignedp) | |
2ba172e0 | 4109 | return simplify_gen_binary (UDIV, mode, op0, op1); |
b5b8b0ac AO |
4110 | else |
4111 | { | |
2ba172e0 JJ |
4112 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4113 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4114 | rtx adj = floor_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4115 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4116 | } |
4117 | ||
4118 | case FLOOR_MOD_EXPR: | |
4119 | if (unsignedp) | |
2ba172e0 | 4120 | return simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac AO |
4121 | else |
4122 | { | |
2ba172e0 | 4123 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4124 | rtx adj = floor_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4125 | adj = simplify_gen_unary (NEG, mode, |
4126 | simplify_gen_binary (MULT, mode, adj, op1), | |
4127 | mode); | |
4128 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4129 | } |
4130 | ||
4131 | case CEIL_DIV_EXPR: | |
4132 | if (unsignedp) | |
4133 | { | |
2ba172e0 JJ |
4134 | rtx div = simplify_gen_binary (UDIV, mode, op0, op1); |
4135 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); | |
b5b8b0ac | 4136 | rtx adj = ceil_udiv_adjust (mode, mod, op1); |
2ba172e0 | 4137 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4138 | } |
4139 | else | |
4140 | { | |
2ba172e0 JJ |
4141 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4142 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4143 | rtx adj = ceil_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4144 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4145 | } |
4146 | ||
4147 | case CEIL_MOD_EXPR: | |
4148 | if (unsignedp) | |
4149 | { | |
2ba172e0 | 4150 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac | 4151 | rtx adj = ceil_udiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4152 | adj = simplify_gen_unary (NEG, mode, |
4153 | simplify_gen_binary (MULT, mode, adj, op1), | |
4154 | mode); | |
4155 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4156 | } |
4157 | else | |
4158 | { | |
2ba172e0 | 4159 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4160 | rtx adj = ceil_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4161 | adj = simplify_gen_unary (NEG, mode, |
4162 | simplify_gen_binary (MULT, mode, adj, op1), | |
4163 | mode); | |
4164 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4165 | } |
4166 | ||
4167 | case ROUND_DIV_EXPR: | |
4168 | if (unsignedp) | |
4169 | { | |
2ba172e0 JJ |
4170 | rtx div = simplify_gen_binary (UDIV, mode, op0, op1); |
4171 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); | |
b5b8b0ac | 4172 | rtx adj = round_udiv_adjust (mode, mod, op1); |
2ba172e0 | 4173 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4174 | } |
4175 | else | |
4176 | { | |
2ba172e0 JJ |
4177 | rtx div = simplify_gen_binary (DIV, mode, op0, op1); |
4178 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); | |
b5b8b0ac | 4179 | rtx adj = round_sdiv_adjust (mode, mod, op1); |
2ba172e0 | 4180 | return simplify_gen_binary (PLUS, mode, div, adj); |
b5b8b0ac AO |
4181 | } |
4182 | ||
4183 | case ROUND_MOD_EXPR: | |
4184 | if (unsignedp) | |
4185 | { | |
2ba172e0 | 4186 | rtx mod = simplify_gen_binary (UMOD, mode, op0, op1); |
b5b8b0ac | 4187 | rtx adj = round_udiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4188 | adj = simplify_gen_unary (NEG, mode, |
4189 | simplify_gen_binary (MULT, mode, adj, op1), | |
4190 | mode); | |
4191 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4192 | } |
4193 | else | |
4194 | { | |
2ba172e0 | 4195 | rtx mod = simplify_gen_binary (MOD, mode, op0, op1); |
b5b8b0ac | 4196 | rtx adj = round_sdiv_adjust (mode, mod, op1); |
2ba172e0 JJ |
4197 | adj = simplify_gen_unary (NEG, mode, |
4198 | simplify_gen_binary (MULT, mode, adj, op1), | |
4199 | mode); | |
4200 | return simplify_gen_binary (PLUS, mode, mod, adj); | |
b5b8b0ac AO |
4201 | } |
4202 | ||
4203 | case LSHIFT_EXPR: | |
2ba172e0 | 4204 | return simplify_gen_binary (ASHIFT, mode, op0, op1); |
b5b8b0ac AO |
4205 | |
4206 | case RSHIFT_EXPR: | |
4207 | if (unsignedp) | |
2ba172e0 | 4208 | return simplify_gen_binary (LSHIFTRT, mode, op0, op1); |
b5b8b0ac | 4209 | else |
2ba172e0 | 4210 | return simplify_gen_binary (ASHIFTRT, mode, op0, op1); |
b5b8b0ac AO |
4211 | |
4212 | case LROTATE_EXPR: | |
2ba172e0 | 4213 | return simplify_gen_binary (ROTATE, mode, op0, op1); |
b5b8b0ac AO |
4214 | |
4215 | case RROTATE_EXPR: | |
2ba172e0 | 4216 | return simplify_gen_binary (ROTATERT, mode, op0, op1); |
b5b8b0ac AO |
4217 | |
4218 | case MIN_EXPR: | |
2ba172e0 | 4219 | return simplify_gen_binary (unsignedp ? UMIN : SMIN, mode, op0, op1); |
b5b8b0ac AO |
4220 | |
4221 | case MAX_EXPR: | |
2ba172e0 | 4222 | return simplify_gen_binary (unsignedp ? UMAX : SMAX, mode, op0, op1); |
b5b8b0ac AO |
4223 | |
4224 | case BIT_AND_EXPR: | |
4225 | case TRUTH_AND_EXPR: | |
2ba172e0 | 4226 | return simplify_gen_binary (AND, mode, op0, op1); |
b5b8b0ac AO |
4227 | |
4228 | case BIT_IOR_EXPR: | |
4229 | case TRUTH_OR_EXPR: | |
2ba172e0 | 4230 | return simplify_gen_binary (IOR, mode, op0, op1); |
b5b8b0ac AO |
4231 | |
4232 | case BIT_XOR_EXPR: | |
4233 | case TRUTH_XOR_EXPR: | |
2ba172e0 | 4234 | return simplify_gen_binary (XOR, mode, op0, op1); |
b5b8b0ac AO |
4235 | |
4236 | case TRUTH_ANDIF_EXPR: | |
4237 | return gen_rtx_IF_THEN_ELSE (mode, op0, op1, const0_rtx); | |
4238 | ||
4239 | case TRUTH_ORIF_EXPR: | |
4240 | return gen_rtx_IF_THEN_ELSE (mode, op0, const_true_rtx, op1); | |
4241 | ||
4242 | case TRUTH_NOT_EXPR: | |
2ba172e0 | 4243 | return simplify_gen_relational (EQ, mode, inner_mode, op0, const0_rtx); |
b5b8b0ac AO |
4244 | |
4245 | case LT_EXPR: | |
2ba172e0 JJ |
4246 | return simplify_gen_relational (unsignedp ? LTU : LT, mode, inner_mode, |
4247 | op0, op1); | |
b5b8b0ac AO |
4248 | |
4249 | case LE_EXPR: | |
2ba172e0 JJ |
4250 | return simplify_gen_relational (unsignedp ? LEU : LE, mode, inner_mode, |
4251 | op0, op1); | |
b5b8b0ac AO |
4252 | |
4253 | case GT_EXPR: | |
2ba172e0 JJ |
4254 | return simplify_gen_relational (unsignedp ? GTU : GT, mode, inner_mode, |
4255 | op0, op1); | |
b5b8b0ac AO |
4256 | |
4257 | case GE_EXPR: | |
2ba172e0 JJ |
4258 | return simplify_gen_relational (unsignedp ? GEU : GE, mode, inner_mode, |
4259 | op0, op1); | |
b5b8b0ac AO |
4260 | |
4261 | case EQ_EXPR: | |
2ba172e0 | 4262 | return simplify_gen_relational (EQ, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4263 | |
4264 | case NE_EXPR: | |
2ba172e0 | 4265 | return simplify_gen_relational (NE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4266 | |
4267 | case UNORDERED_EXPR: | |
2ba172e0 | 4268 | return simplify_gen_relational (UNORDERED, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4269 | |
4270 | case ORDERED_EXPR: | |
2ba172e0 | 4271 | return simplify_gen_relational (ORDERED, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4272 | |
4273 | case UNLT_EXPR: | |
2ba172e0 | 4274 | return simplify_gen_relational (UNLT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4275 | |
4276 | case UNLE_EXPR: | |
2ba172e0 | 4277 | return simplify_gen_relational (UNLE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4278 | |
4279 | case UNGT_EXPR: | |
2ba172e0 | 4280 | return simplify_gen_relational (UNGT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4281 | |
4282 | case UNGE_EXPR: | |
2ba172e0 | 4283 | return simplify_gen_relational (UNGE, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4284 | |
4285 | case UNEQ_EXPR: | |
2ba172e0 | 4286 | return simplify_gen_relational (UNEQ, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4287 | |
4288 | case LTGT_EXPR: | |
2ba172e0 | 4289 | return simplify_gen_relational (LTGT, mode, inner_mode, op0, op1); |
b5b8b0ac AO |
4290 | |
4291 | case COND_EXPR: | |
4292 | return gen_rtx_IF_THEN_ELSE (mode, op0, op1, op2); | |
4293 | ||
4294 | case COMPLEX_EXPR: | |
4295 | gcc_assert (COMPLEX_MODE_P (mode)); | |
4296 | if (GET_MODE (op0) == VOIDmode) | |
4297 | op0 = gen_rtx_CONST (GET_MODE_INNER (mode), op0); | |
4298 | if (GET_MODE (op1) == VOIDmode) | |
4299 | op1 = gen_rtx_CONST (GET_MODE_INNER (mode), op1); | |
4300 | return gen_rtx_CONCAT (mode, op0, op1); | |
4301 | ||
d02a5a4b JJ |
4302 | case CONJ_EXPR: |
4303 | if (GET_CODE (op0) == CONCAT) | |
4304 | return gen_rtx_CONCAT (mode, XEXP (op0, 0), | |
2ba172e0 JJ |
4305 | simplify_gen_unary (NEG, GET_MODE_INNER (mode), |
4306 | XEXP (op0, 1), | |
4307 | GET_MODE_INNER (mode))); | |
d02a5a4b JJ |
4308 | else |
4309 | { | |
4310 | enum machine_mode imode = GET_MODE_INNER (mode); | |
4311 | rtx re, im; | |
4312 | ||
4313 | if (MEM_P (op0)) | |
4314 | { | |
4315 | re = adjust_address_nv (op0, imode, 0); | |
4316 | im = adjust_address_nv (op0, imode, GET_MODE_SIZE (imode)); | |
4317 | } | |
4318 | else | |
4319 | { | |
4320 | enum machine_mode ifmode = int_mode_for_mode (mode); | |
4321 | enum machine_mode ihmode = int_mode_for_mode (imode); | |
4322 | rtx halfsize; | |
4323 | if (ifmode == BLKmode || ihmode == BLKmode) | |
4324 | return NULL; | |
4325 | halfsize = GEN_INT (GET_MODE_BITSIZE (ihmode)); | |
4326 | re = op0; | |
4327 | if (mode != ifmode) | |
4328 | re = gen_rtx_SUBREG (ifmode, re, 0); | |
4329 | re = gen_rtx_ZERO_EXTRACT (ihmode, re, halfsize, const0_rtx); | |
4330 | if (imode != ihmode) | |
4331 | re = gen_rtx_SUBREG (imode, re, 0); | |
4332 | im = copy_rtx (op0); | |
4333 | if (mode != ifmode) | |
4334 | im = gen_rtx_SUBREG (ifmode, im, 0); | |
4335 | im = gen_rtx_ZERO_EXTRACT (ihmode, im, halfsize, halfsize); | |
4336 | if (imode != ihmode) | |
4337 | im = gen_rtx_SUBREG (imode, im, 0); | |
4338 | } | |
4339 | im = gen_rtx_NEG (imode, im); | |
4340 | return gen_rtx_CONCAT (mode, re, im); | |
4341 | } | |
4342 | ||
b5b8b0ac AO |
4343 | case ADDR_EXPR: |
4344 | op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); | |
4345 | if (!op0 || !MEM_P (op0)) | |
c8a27c40 JJ |
4346 | { |
4347 | if ((TREE_CODE (TREE_OPERAND (exp, 0)) == VAR_DECL | |
4348 | || TREE_CODE (TREE_OPERAND (exp, 0)) == PARM_DECL | |
4349 | || TREE_CODE (TREE_OPERAND (exp, 0)) == RESULT_DECL) | |
f8cca67b JJ |
4350 | && (!TREE_ADDRESSABLE (TREE_OPERAND (exp, 0)) |
4351 | || target_for_debug_bind (TREE_OPERAND (exp, 0)))) | |
c8a27c40 JJ |
4352 | return gen_rtx_DEBUG_IMPLICIT_PTR (mode, TREE_OPERAND (exp, 0)); |
4353 | ||
4354 | if (handled_component_p (TREE_OPERAND (exp, 0))) | |
4355 | { | |
4356 | HOST_WIDE_INT bitoffset, bitsize, maxsize; | |
4357 | tree decl | |
4358 | = get_ref_base_and_extent (TREE_OPERAND (exp, 0), | |
4359 | &bitoffset, &bitsize, &maxsize); | |
4360 | if ((TREE_CODE (decl) == VAR_DECL | |
4361 | || TREE_CODE (decl) == PARM_DECL | |
4362 | || TREE_CODE (decl) == RESULT_DECL) | |
f8cca67b JJ |
4363 | && (!TREE_ADDRESSABLE (decl) |
4364 | || target_for_debug_bind (decl)) | |
c8a27c40 JJ |
4365 | && (bitoffset % BITS_PER_UNIT) == 0 |
4366 | && bitsize > 0 | |
4367 | && bitsize == maxsize) | |
0a81f074 RS |
4368 | { |
4369 | rtx base = gen_rtx_DEBUG_IMPLICIT_PTR (mode, decl); | |
4370 | return plus_constant (mode, base, bitoffset / BITS_PER_UNIT); | |
4371 | } | |
c8a27c40 JJ |
4372 | } |
4373 | ||
9430b7ba JJ |
4374 | if (TREE_CODE (TREE_OPERAND (exp, 0)) == MEM_REF |
4375 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0)) | |
4376 | == ADDR_EXPR) | |
4377 | { | |
4378 | op0 = expand_debug_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), | |
4379 | 0)); | |
4380 | if (op0 != NULL | |
4381 | && (GET_CODE (op0) == DEBUG_IMPLICIT_PTR | |
4382 | || (GET_CODE (op0) == PLUS | |
4383 | && GET_CODE (XEXP (op0, 0)) == DEBUG_IMPLICIT_PTR | |
4384 | && CONST_INT_P (XEXP (op0, 1))))) | |
4385 | { | |
4386 | op1 = expand_debug_expr (TREE_OPERAND (TREE_OPERAND (exp, 0), | |
4387 | 1)); | |
4388 | if (!op1 || !CONST_INT_P (op1)) | |
4389 | return NULL; | |
4390 | ||
4391 | return plus_constant (mode, op0, INTVAL (op1)); | |
4392 | } | |
4393 | } | |
4394 | ||
c8a27c40 JJ |
4395 | return NULL; |
4396 | } | |
b5b8b0ac | 4397 | |
f61c6f34 JJ |
4398 | as = TYPE_ADDR_SPACE (TREE_TYPE (exp)); |
4399 | op0 = convert_debug_memory_address (mode, XEXP (op0, 0), as); | |
dda2da58 AO |
4400 | |
4401 | return op0; | |
b5b8b0ac AO |
4402 | |
4403 | case VECTOR_CST: | |
d2a12ae7 RG |
4404 | { |
4405 | unsigned i; | |
4406 | ||
4407 | op0 = gen_rtx_CONCATN | |
4408 | (mode, rtvec_alloc (TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)))); | |
4409 | ||
4410 | for (i = 0; i < VECTOR_CST_NELTS (exp); ++i) | |
4411 | { | |
4412 | op1 = expand_debug_expr (VECTOR_CST_ELT (exp, i)); | |
4413 | if (!op1) | |
4414 | return NULL; | |
4415 | XVECEXP (op0, 0, i) = op1; | |
4416 | } | |
4417 | ||
4418 | return op0; | |
4419 | } | |
b5b8b0ac AO |
4420 | |
4421 | case CONSTRUCTOR: | |
47598145 MM |
4422 | if (TREE_CLOBBER_P (exp)) |
4423 | return NULL; | |
4424 | else if (TREE_CODE (TREE_TYPE (exp)) == VECTOR_TYPE) | |
b5b8b0ac AO |
4425 | { |
4426 | unsigned i; | |
4427 | tree val; | |
4428 | ||
4429 | op0 = gen_rtx_CONCATN | |
4430 | (mode, rtvec_alloc (TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)))); | |
4431 | ||
4432 | FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), i, val) | |
4433 | { | |
4434 | op1 = expand_debug_expr (val); | |
4435 | if (!op1) | |
4436 | return NULL; | |
4437 | XVECEXP (op0, 0, i) = op1; | |
4438 | } | |
4439 | ||
4440 | if (i < TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp))) | |
4441 | { | |
4442 | op1 = expand_debug_expr | |
e8160c9a | 4443 | (build_zero_cst (TREE_TYPE (TREE_TYPE (exp)))); |
b5b8b0ac AO |
4444 | |
4445 | if (!op1) | |
4446 | return NULL; | |
4447 | ||
4448 | for (; i < TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)); i++) | |
4449 | XVECEXP (op0, 0, i) = op1; | |
4450 | } | |
4451 | ||
4452 | return op0; | |
4453 | } | |
4454 | else | |
4455 | goto flag_unsupported; | |
4456 | ||
4457 | case CALL_EXPR: | |
4458 | /* ??? Maybe handle some builtins? */ | |
4459 | return NULL; | |
4460 | ||
4461 | case SSA_NAME: | |
4462 | { | |
2a8e30fb MM |
4463 | gimple g = get_gimple_for_ssa_name (exp); |
4464 | if (g) | |
4465 | { | |
4466 | op0 = expand_debug_expr (gimple_assign_rhs_to_tree (g)); | |
4467 | if (!op0) | |
4468 | return NULL; | |
4469 | } | |
4470 | else | |
4471 | { | |
4472 | int part = var_to_partition (SA.map, exp); | |
b5b8b0ac | 4473 | |
2a8e30fb | 4474 | if (part == NO_PARTITION) |
a58a8e4b JJ |
4475 | { |
4476 | /* If this is a reference to an incoming value of parameter | |
4477 | that is never used in the code or where the incoming | |
4478 | value is never used in the code, use PARM_DECL's | |
4479 | DECL_RTL if set. */ | |
4480 | if (SSA_NAME_IS_DEFAULT_DEF (exp) | |
4481 | && TREE_CODE (SSA_NAME_VAR (exp)) == PARM_DECL) | |
4482 | { | |
12c5ffe5 EB |
4483 | op0 = expand_debug_parm_decl (SSA_NAME_VAR (exp)); |
4484 | if (op0) | |
4485 | goto adjust_mode; | |
a58a8e4b | 4486 | op0 = expand_debug_expr (SSA_NAME_VAR (exp)); |
12c5ffe5 EB |
4487 | if (op0) |
4488 | goto adjust_mode; | |
a58a8e4b JJ |
4489 | } |
4490 | return NULL; | |
4491 | } | |
b5b8b0ac | 4492 | |
2a8e30fb | 4493 | gcc_assert (part >= 0 && (unsigned)part < SA.map->num_partitions); |
b5b8b0ac | 4494 | |
abfea58d | 4495 | op0 = copy_rtx (SA.partition_to_pseudo[part]); |
2a8e30fb | 4496 | } |
b5b8b0ac AO |
4497 | goto adjust_mode; |
4498 | } | |
4499 | ||
4500 | case ERROR_MARK: | |
4501 | return NULL; | |
4502 | ||
7ece48b1 JJ |
4503 | /* Vector stuff. For most of the codes we don't have rtl codes. */ |
4504 | case REALIGN_LOAD_EXPR: | |
4505 | case REDUC_MAX_EXPR: | |
4506 | case REDUC_MIN_EXPR: | |
4507 | case REDUC_PLUS_EXPR: | |
4508 | case VEC_COND_EXPR: | |
7ece48b1 JJ |
4509 | case VEC_LSHIFT_EXPR: |
4510 | case VEC_PACK_FIX_TRUNC_EXPR: | |
4511 | case VEC_PACK_SAT_EXPR: | |
4512 | case VEC_PACK_TRUNC_EXPR: | |
4513 | case VEC_RSHIFT_EXPR: | |
4514 | case VEC_UNPACK_FLOAT_HI_EXPR: | |
4515 | case VEC_UNPACK_FLOAT_LO_EXPR: | |
4516 | case VEC_UNPACK_HI_EXPR: | |
4517 | case VEC_UNPACK_LO_EXPR: | |
4518 | case VEC_WIDEN_MULT_HI_EXPR: | |
4519 | case VEC_WIDEN_MULT_LO_EXPR: | |
3f30a9a6 RH |
4520 | case VEC_WIDEN_MULT_EVEN_EXPR: |
4521 | case VEC_WIDEN_MULT_ODD_EXPR: | |
36ba4aae IR |
4522 | case VEC_WIDEN_LSHIFT_HI_EXPR: |
4523 | case VEC_WIDEN_LSHIFT_LO_EXPR: | |
3f3af9df | 4524 | case VEC_PERM_EXPR: |
7ece48b1 JJ |
4525 | return NULL; |
4526 | ||
98449720 | 4527 | /* Misc codes. */ |
7ece48b1 JJ |
4528 | case ADDR_SPACE_CONVERT_EXPR: |
4529 | case FIXED_CONVERT_EXPR: | |
4530 | case OBJ_TYPE_REF: | |
4531 | case WITH_SIZE_EXPR: | |
4532 | return NULL; | |
4533 | ||
4534 | case DOT_PROD_EXPR: | |
4535 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) | |
4536 | && SCALAR_INT_MODE_P (mode)) | |
4537 | { | |
2ba172e0 JJ |
4538 | op0 |
4539 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
4540 | 0))) | |
4541 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op0, | |
4542 | inner_mode); | |
4543 | op1 | |
4544 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
4545 | 1))) | |
4546 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op1, | |
4547 | inner_mode); | |
4548 | op0 = simplify_gen_binary (MULT, mode, op0, op1); | |
4549 | return simplify_gen_binary (PLUS, mode, op0, op2); | |
7ece48b1 JJ |
4550 | } |
4551 | return NULL; | |
4552 | ||
4553 | case WIDEN_MULT_EXPR: | |
0354c0c7 BS |
4554 | case WIDEN_MULT_PLUS_EXPR: |
4555 | case WIDEN_MULT_MINUS_EXPR: | |
7ece48b1 JJ |
4556 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) |
4557 | && SCALAR_INT_MODE_P (mode)) | |
4558 | { | |
2ba172e0 | 4559 | inner_mode = GET_MODE (op0); |
7ece48b1 | 4560 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0)))) |
5b58b39b | 4561 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); |
7ece48b1 | 4562 | else |
5b58b39b | 4563 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); |
7ece48b1 | 4564 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 1)))) |
5b58b39b | 4565 | op1 = simplify_gen_unary (ZERO_EXTEND, mode, op1, inner_mode); |
7ece48b1 | 4566 | else |
5b58b39b | 4567 | op1 = simplify_gen_unary (SIGN_EXTEND, mode, op1, inner_mode); |
2ba172e0 | 4568 | op0 = simplify_gen_binary (MULT, mode, op0, op1); |
0354c0c7 BS |
4569 | if (TREE_CODE (exp) == WIDEN_MULT_EXPR) |
4570 | return op0; | |
4571 | else if (TREE_CODE (exp) == WIDEN_MULT_PLUS_EXPR) | |
2ba172e0 | 4572 | return simplify_gen_binary (PLUS, mode, op0, op2); |
0354c0c7 | 4573 | else |
2ba172e0 | 4574 | return simplify_gen_binary (MINUS, mode, op2, op0); |
7ece48b1 JJ |
4575 | } |
4576 | return NULL; | |
4577 | ||
98449720 RH |
4578 | case MULT_HIGHPART_EXPR: |
4579 | /* ??? Similar to the above. */ | |
4580 | return NULL; | |
4581 | ||
7ece48b1 | 4582 | case WIDEN_SUM_EXPR: |
3f3af9df | 4583 | case WIDEN_LSHIFT_EXPR: |
7ece48b1 JJ |
4584 | if (SCALAR_INT_MODE_P (GET_MODE (op0)) |
4585 | && SCALAR_INT_MODE_P (mode)) | |
4586 | { | |
2ba172e0 JJ |
4587 | op0 |
4588 | = simplify_gen_unary (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, | |
4589 | 0))) | |
4590 | ? ZERO_EXTEND : SIGN_EXTEND, mode, op0, | |
4591 | inner_mode); | |
3f3af9df JJ |
4592 | return simplify_gen_binary (TREE_CODE (exp) == WIDEN_LSHIFT_EXPR |
4593 | ? ASHIFT : PLUS, mode, op0, op1); | |
7ece48b1 JJ |
4594 | } |
4595 | return NULL; | |
4596 | ||
0f59b812 | 4597 | case FMA_EXPR: |
2ba172e0 | 4598 | return simplify_gen_ternary (FMA, mode, inner_mode, op0, op1, op2); |
0f59b812 | 4599 | |
b5b8b0ac AO |
4600 | default: |
4601 | flag_unsupported: | |
4602 | #ifdef ENABLE_CHECKING | |
4603 | debug_tree (exp); | |
4604 | gcc_unreachable (); | |
4605 | #else | |
4606 | return NULL; | |
4607 | #endif | |
4608 | } | |
4609 | } | |
4610 | ||
ddb555ed JJ |
4611 | /* Return an RTX equivalent to the source bind value of the tree expression |
4612 | EXP. */ | |
4613 | ||
4614 | static rtx | |
4615 | expand_debug_source_expr (tree exp) | |
4616 | { | |
4617 | rtx op0 = NULL_RTX; | |
4618 | enum machine_mode mode = VOIDmode, inner_mode; | |
4619 | ||
4620 | switch (TREE_CODE (exp)) | |
4621 | { | |
4622 | case PARM_DECL: | |
4623 | { | |
ddb555ed | 4624 | mode = DECL_MODE (exp); |
12c5ffe5 EB |
4625 | op0 = expand_debug_parm_decl (exp); |
4626 | if (op0) | |
4627 | break; | |
ddb555ed JJ |
4628 | /* See if this isn't an argument that has been completely |
4629 | optimized out. */ | |
4630 | if (!DECL_RTL_SET_P (exp) | |
12c5ffe5 | 4631 | && !DECL_INCOMING_RTL (exp) |
ddb555ed JJ |
4632 | && DECL_ABSTRACT_ORIGIN (current_function_decl)) |
4633 | { | |
7b575cfa | 4634 | tree aexp = DECL_ORIGIN (exp); |
ddb555ed JJ |
4635 | if (DECL_CONTEXT (aexp) |
4636 | == DECL_ABSTRACT_ORIGIN (current_function_decl)) | |
4637 | { | |
9771b263 | 4638 | vec<tree, va_gc> **debug_args; |
ddb555ed JJ |
4639 | unsigned int ix; |
4640 | tree ddecl; | |
ddb555ed JJ |
4641 | debug_args = decl_debug_args_lookup (current_function_decl); |
4642 | if (debug_args != NULL) | |
4643 | { | |
9771b263 | 4644 | for (ix = 0; vec_safe_iterate (*debug_args, ix, &ddecl); |
ddb555ed JJ |
4645 | ix += 2) |
4646 | if (ddecl == aexp) | |
4647 | return gen_rtx_DEBUG_PARAMETER_REF (mode, aexp); | |
4648 | } | |
4649 | } | |
4650 | } | |
4651 | break; | |
4652 | } | |
4653 | default: | |
4654 | break; | |
4655 | } | |
4656 | ||
4657 | if (op0 == NULL_RTX) | |
4658 | return NULL_RTX; | |
4659 | ||
4660 | inner_mode = GET_MODE (op0); | |
4661 | if (mode == inner_mode) | |
4662 | return op0; | |
4663 | ||
4664 | if (FLOAT_MODE_P (mode) && FLOAT_MODE_P (inner_mode)) | |
4665 | { | |
4666 | if (GET_MODE_BITSIZE (mode) == GET_MODE_BITSIZE (inner_mode)) | |
4667 | op0 = simplify_gen_subreg (mode, op0, inner_mode, 0); | |
4668 | else if (GET_MODE_BITSIZE (mode) < GET_MODE_BITSIZE (inner_mode)) | |
4669 | op0 = simplify_gen_unary (FLOAT_TRUNCATE, mode, op0, inner_mode); | |
4670 | else | |
4671 | op0 = simplify_gen_unary (FLOAT_EXTEND, mode, op0, inner_mode); | |
4672 | } | |
4673 | else if (FLOAT_MODE_P (mode)) | |
4674 | gcc_unreachable (); | |
4675 | else if (FLOAT_MODE_P (inner_mode)) | |
4676 | { | |
4677 | if (TYPE_UNSIGNED (TREE_TYPE (exp))) | |
4678 | op0 = simplify_gen_unary (UNSIGNED_FIX, mode, op0, inner_mode); | |
4679 | else | |
4680 | op0 = simplify_gen_unary (FIX, mode, op0, inner_mode); | |
4681 | } | |
4682 | else if (CONSTANT_P (op0) | |
4683 | || GET_MODE_BITSIZE (mode) <= GET_MODE_BITSIZE (inner_mode)) | |
4684 | op0 = simplify_gen_subreg (mode, op0, inner_mode, | |
4685 | subreg_lowpart_offset (mode, inner_mode)); | |
4686 | else if (TYPE_UNSIGNED (TREE_TYPE (exp))) | |
4687 | op0 = simplify_gen_unary (ZERO_EXTEND, mode, op0, inner_mode); | |
4688 | else | |
4689 | op0 = simplify_gen_unary (SIGN_EXTEND, mode, op0, inner_mode); | |
4690 | ||
4691 | return op0; | |
4692 | } | |
4693 | ||
6cfa417f JJ |
4694 | /* Ensure INSN_VAR_LOCATION_LOC (insn) doesn't have unbound complexity. |
4695 | Allow 4 levels of rtl nesting for most rtl codes, and if we see anything | |
4696 | deeper than that, create DEBUG_EXPRs and emit DEBUG_INSNs before INSN. */ | |
4697 | ||
4698 | static void | |
4699 | avoid_complex_debug_insns (rtx insn, rtx *exp_p, int depth) | |
4700 | { | |
4701 | rtx exp = *exp_p; | |
4702 | ||
4703 | if (exp == NULL_RTX) | |
4704 | return; | |
4705 | ||
4706 | if ((OBJECT_P (exp) && !MEM_P (exp)) || GET_CODE (exp) == CLOBBER) | |
4707 | return; | |
4708 | ||
4709 | if (depth == 4) | |
4710 | { | |
4711 | /* Create DEBUG_EXPR (and DEBUG_EXPR_DECL). */ | |
4712 | rtx dval = make_debug_expr_from_rtl (exp); | |
4713 | ||
4714 | /* Emit a debug bind insn before INSN. */ | |
4715 | rtx bind = gen_rtx_VAR_LOCATION (GET_MODE (exp), | |
4716 | DEBUG_EXPR_TREE_DECL (dval), exp, | |
4717 | VAR_INIT_STATUS_INITIALIZED); | |
4718 | ||
4719 | emit_debug_insn_before (bind, insn); | |
4720 | *exp_p = dval; | |
4721 | return; | |
4722 | } | |
4723 | ||
4724 | const char *format_ptr = GET_RTX_FORMAT (GET_CODE (exp)); | |
4725 | int i, j; | |
4726 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (exp)); i++) | |
4727 | switch (*format_ptr++) | |
4728 | { | |
4729 | case 'e': | |
4730 | avoid_complex_debug_insns (insn, &XEXP (exp, i), depth + 1); | |
4731 | break; | |
4732 | ||
4733 | case 'E': | |
4734 | case 'V': | |
4735 | for (j = 0; j < XVECLEN (exp, i); j++) | |
4736 | avoid_complex_debug_insns (insn, &XVECEXP (exp, i, j), depth + 1); | |
4737 | break; | |
4738 | ||
4739 | default: | |
4740 | break; | |
4741 | } | |
4742 | } | |
4743 | ||
b5b8b0ac AO |
4744 | /* Expand the _LOCs in debug insns. We run this after expanding all |
4745 | regular insns, so that any variables referenced in the function | |
4746 | will have their DECL_RTLs set. */ | |
4747 | ||
4748 | static void | |
4749 | expand_debug_locations (void) | |
4750 | { | |
4751 | rtx insn; | |
4752 | rtx last = get_last_insn (); | |
4753 | int save_strict_alias = flag_strict_aliasing; | |
4754 | ||
4755 | /* New alias sets while setting up memory attributes cause | |
4756 | -fcompare-debug failures, even though it doesn't bring about any | |
4757 | codegen changes. */ | |
4758 | flag_strict_aliasing = 0; | |
4759 | ||
4760 | for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) | |
4761 | if (DEBUG_INSN_P (insn)) | |
4762 | { | |
4763 | tree value = (tree)INSN_VAR_LOCATION_LOC (insn); | |
6cfa417f | 4764 | rtx val, prev_insn, insn2; |
b5b8b0ac AO |
4765 | enum machine_mode mode; |
4766 | ||
4767 | if (value == NULL_TREE) | |
4768 | val = NULL_RTX; | |
4769 | else | |
4770 | { | |
ddb555ed JJ |
4771 | if (INSN_VAR_LOCATION_STATUS (insn) |
4772 | == VAR_INIT_STATUS_UNINITIALIZED) | |
4773 | val = expand_debug_source_expr (value); | |
4774 | else | |
4775 | val = expand_debug_expr (value); | |
b5b8b0ac AO |
4776 | gcc_assert (last == get_last_insn ()); |
4777 | } | |
4778 | ||
4779 | if (!val) | |
4780 | val = gen_rtx_UNKNOWN_VAR_LOC (); | |
4781 | else | |
4782 | { | |
4783 | mode = GET_MODE (INSN_VAR_LOCATION (insn)); | |
4784 | ||
4785 | gcc_assert (mode == GET_MODE (val) | |
4786 | || (GET_MODE (val) == VOIDmode | |
33ffb5c5 | 4787 | && (CONST_SCALAR_INT_P (val) |
b5b8b0ac | 4788 | || GET_CODE (val) == CONST_FIXED |
b5b8b0ac AO |
4789 | || GET_CODE (val) == LABEL_REF))); |
4790 | } | |
4791 | ||
4792 | INSN_VAR_LOCATION_LOC (insn) = val; | |
6cfa417f JJ |
4793 | prev_insn = PREV_INSN (insn); |
4794 | for (insn2 = insn; insn2 != prev_insn; insn2 = PREV_INSN (insn2)) | |
4795 | avoid_complex_debug_insns (insn2, &INSN_VAR_LOCATION_LOC (insn2), 0); | |
b5b8b0ac AO |
4796 | } |
4797 | ||
4798 | flag_strict_aliasing = save_strict_alias; | |
4799 | } | |
4800 | ||
242229bb JH |
4801 | /* Expand basic block BB from GIMPLE trees to RTL. */ |
4802 | ||
4803 | static basic_block | |
f3ddd692 | 4804 | expand_gimple_basic_block (basic_block bb, bool disable_tail_calls) |
242229bb | 4805 | { |
726a989a RB |
4806 | gimple_stmt_iterator gsi; |
4807 | gimple_seq stmts; | |
4808 | gimple stmt = NULL; | |
242229bb JH |
4809 | rtx note, last; |
4810 | edge e; | |
628f6a4e | 4811 | edge_iterator ei; |
8b11009b | 4812 | void **elt; |
242229bb JH |
4813 | |
4814 | if (dump_file) | |
726a989a RB |
4815 | fprintf (dump_file, "\n;; Generating RTL for gimple basic block %d\n", |
4816 | bb->index); | |
4817 | ||
4818 | /* Note that since we are now transitioning from GIMPLE to RTL, we | |
4819 | cannot use the gsi_*_bb() routines because they expect the basic | |
4820 | block to be in GIMPLE, instead of RTL. Therefore, we need to | |
4821 | access the BB sequence directly. */ | |
4822 | stmts = bb_seq (bb); | |
3e8b732e MM |
4823 | bb->il.gimple.seq = NULL; |
4824 | bb->il.gimple.phi_nodes = NULL; | |
bf08ebeb | 4825 | rtl_profile_for_bb (bb); |
5e2d947c JH |
4826 | init_rtl_bb_info (bb); |
4827 | bb->flags |= BB_RTL; | |
4828 | ||
a9b77cd1 ZD |
4829 | /* Remove the RETURN_EXPR if we may fall though to the exit |
4830 | instead. */ | |
726a989a RB |
4831 | gsi = gsi_last (stmts); |
4832 | if (!gsi_end_p (gsi) | |
4833 | && gimple_code (gsi_stmt (gsi)) == GIMPLE_RETURN) | |
a9b77cd1 | 4834 | { |
726a989a | 4835 | gimple ret_stmt = gsi_stmt (gsi); |
a9b77cd1 ZD |
4836 | |
4837 | gcc_assert (single_succ_p (bb)); | |
4838 | gcc_assert (single_succ (bb) == EXIT_BLOCK_PTR); | |
4839 | ||
4840 | if (bb->next_bb == EXIT_BLOCK_PTR | |
726a989a | 4841 | && !gimple_return_retval (ret_stmt)) |
a9b77cd1 | 4842 | { |
726a989a | 4843 | gsi_remove (&gsi, false); |
a9b77cd1 ZD |
4844 | single_succ_edge (bb)->flags |= EDGE_FALLTHRU; |
4845 | } | |
4846 | } | |
4847 | ||
726a989a RB |
4848 | gsi = gsi_start (stmts); |
4849 | if (!gsi_end_p (gsi)) | |
8b11009b | 4850 | { |
726a989a RB |
4851 | stmt = gsi_stmt (gsi); |
4852 | if (gimple_code (stmt) != GIMPLE_LABEL) | |
4853 | stmt = NULL; | |
8b11009b | 4854 | } |
242229bb | 4855 | |
8b11009b ZD |
4856 | elt = pointer_map_contains (lab_rtx_for_bb, bb); |
4857 | ||
4858 | if (stmt || elt) | |
242229bb JH |
4859 | { |
4860 | last = get_last_insn (); | |
4861 | ||
8b11009b ZD |
4862 | if (stmt) |
4863 | { | |
28ed065e | 4864 | expand_gimple_stmt (stmt); |
726a989a | 4865 | gsi_next (&gsi); |
8b11009b ZD |
4866 | } |
4867 | ||
4868 | if (elt) | |
ae50c0cb | 4869 | emit_label ((rtx) *elt); |
242229bb | 4870 | |
caf93cb0 | 4871 | /* Java emits line number notes in the top of labels. |
c22cacf3 | 4872 | ??? Make this go away once line number notes are obsoleted. */ |
242229bb | 4873 | BB_HEAD (bb) = NEXT_INSN (last); |
4b4bf941 | 4874 | if (NOTE_P (BB_HEAD (bb))) |
242229bb | 4875 | BB_HEAD (bb) = NEXT_INSN (BB_HEAD (bb)); |
242229bb | 4876 | note = emit_note_after (NOTE_INSN_BASIC_BLOCK, BB_HEAD (bb)); |
b7211528 | 4877 | |
726a989a | 4878 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
242229bb JH |
4879 | } |
4880 | else | |
4881 | note = BB_HEAD (bb) = emit_note (NOTE_INSN_BASIC_BLOCK); | |
4882 | ||
4883 | NOTE_BASIC_BLOCK (note) = bb; | |
4884 | ||
726a989a | 4885 | for (; !gsi_end_p (gsi); gsi_next (&gsi)) |
242229bb | 4886 | { |
cea49550 | 4887 | basic_block new_bb; |
242229bb | 4888 | |
b5b8b0ac | 4889 | stmt = gsi_stmt (gsi); |
2a8e30fb MM |
4890 | |
4891 | /* If this statement is a non-debug one, and we generate debug | |
4892 | insns, then this one might be the last real use of a TERed | |
4893 | SSA_NAME, but where there are still some debug uses further | |
4894 | down. Expanding the current SSA name in such further debug | |
4895 | uses by their RHS might lead to wrong debug info, as coalescing | |
4896 | might make the operands of such RHS be placed into the same | |
4897 | pseudo as something else. Like so: | |
4898 | a_1 = a_0 + 1; // Assume a_1 is TERed and a_0 is dead | |
4899 | use(a_1); | |
4900 | a_2 = ... | |
4901 | #DEBUG ... => a_1 | |
4902 | As a_0 and a_2 don't overlap in lifetime, assume they are coalesced. | |
4903 | If we now would expand a_1 by it's RHS (a_0 + 1) in the debug use, | |
4904 | the write to a_2 would actually have clobbered the place which | |
4905 | formerly held a_0. | |
4906 | ||
4907 | So, instead of that, we recognize the situation, and generate | |
4908 | debug temporaries at the last real use of TERed SSA names: | |
4909 | a_1 = a_0 + 1; | |
4910 | #DEBUG #D1 => a_1 | |
4911 | use(a_1); | |
4912 | a_2 = ... | |
4913 | #DEBUG ... => #D1 | |
4914 | */ | |
4915 | if (MAY_HAVE_DEBUG_INSNS | |
4916 | && SA.values | |
4917 | && !is_gimple_debug (stmt)) | |
4918 | { | |
4919 | ssa_op_iter iter; | |
4920 | tree op; | |
4921 | gimple def; | |
4922 | ||
5368224f | 4923 | location_t sloc = curr_insn_location (); |
2a8e30fb MM |
4924 | |
4925 | /* Look for SSA names that have their last use here (TERed | |
4926 | names always have only one real use). */ | |
4927 | FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_USE) | |
4928 | if ((def = get_gimple_for_ssa_name (op))) | |
4929 | { | |
4930 | imm_use_iterator imm_iter; | |
4931 | use_operand_p use_p; | |
4932 | bool have_debug_uses = false; | |
4933 | ||
4934 | FOR_EACH_IMM_USE_FAST (use_p, imm_iter, op) | |
4935 | { | |
4936 | if (gimple_debug_bind_p (USE_STMT (use_p))) | |
4937 | { | |
4938 | have_debug_uses = true; | |
4939 | break; | |
4940 | } | |
4941 | } | |
4942 | ||
4943 | if (have_debug_uses) | |
4944 | { | |
4945 | /* OP is a TERed SSA name, with DEF it's defining | |
4946 | statement, and where OP is used in further debug | |
4947 | instructions. Generate a debug temporary, and | |
4948 | replace all uses of OP in debug insns with that | |
4949 | temporary. */ | |
4950 | gimple debugstmt; | |
4951 | tree value = gimple_assign_rhs_to_tree (def); | |
4952 | tree vexpr = make_node (DEBUG_EXPR_DECL); | |
4953 | rtx val; | |
4954 | enum machine_mode mode; | |
4955 | ||
5368224f | 4956 | set_curr_insn_location (gimple_location (def)); |
2a8e30fb MM |
4957 | |
4958 | DECL_ARTIFICIAL (vexpr) = 1; | |
4959 | TREE_TYPE (vexpr) = TREE_TYPE (value); | |
4960 | if (DECL_P (value)) | |
4961 | mode = DECL_MODE (value); | |
4962 | else | |
4963 | mode = TYPE_MODE (TREE_TYPE (value)); | |
4964 | DECL_MODE (vexpr) = mode; | |
4965 | ||
4966 | val = gen_rtx_VAR_LOCATION | |
4967 | (mode, vexpr, (rtx)value, VAR_INIT_STATUS_INITIALIZED); | |
4968 | ||
e8c6bb74 | 4969 | emit_debug_insn (val); |
2a8e30fb MM |
4970 | |
4971 | FOR_EACH_IMM_USE_STMT (debugstmt, imm_iter, op) | |
4972 | { | |
4973 | if (!gimple_debug_bind_p (debugstmt)) | |
4974 | continue; | |
4975 | ||
4976 | FOR_EACH_IMM_USE_ON_STMT (use_p, imm_iter) | |
4977 | SET_USE (use_p, vexpr); | |
4978 | ||
4979 | update_stmt (debugstmt); | |
4980 | } | |
4981 | } | |
4982 | } | |
5368224f | 4983 | set_curr_insn_location (sloc); |
2a8e30fb MM |
4984 | } |
4985 | ||
a5883ba0 | 4986 | currently_expanding_gimple_stmt = stmt; |
b5b8b0ac | 4987 | |
242229bb JH |
4988 | /* Expand this statement, then evaluate the resulting RTL and |
4989 | fixup the CFG accordingly. */ | |
726a989a | 4990 | if (gimple_code (stmt) == GIMPLE_COND) |
cea49550 | 4991 | { |
726a989a | 4992 | new_bb = expand_gimple_cond (bb, stmt); |
cea49550 RH |
4993 | if (new_bb) |
4994 | return new_bb; | |
4995 | } | |
b5b8b0ac AO |
4996 | else if (gimple_debug_bind_p (stmt)) |
4997 | { | |
5368224f | 4998 | location_t sloc = curr_insn_location (); |
b5b8b0ac AO |
4999 | gimple_stmt_iterator nsi = gsi; |
5000 | ||
5001 | for (;;) | |
5002 | { | |
5003 | tree var = gimple_debug_bind_get_var (stmt); | |
5004 | tree value; | |
5005 | rtx val; | |
5006 | enum machine_mode mode; | |
5007 | ||
ec8c1492 JJ |
5008 | if (TREE_CODE (var) != DEBUG_EXPR_DECL |
5009 | && TREE_CODE (var) != LABEL_DECL | |
5010 | && !target_for_debug_bind (var)) | |
5011 | goto delink_debug_stmt; | |
5012 | ||
b5b8b0ac AO |
5013 | if (gimple_debug_bind_has_value_p (stmt)) |
5014 | value = gimple_debug_bind_get_value (stmt); | |
5015 | else | |
5016 | value = NULL_TREE; | |
5017 | ||
5018 | last = get_last_insn (); | |
5019 | ||
5368224f | 5020 | set_curr_insn_location (gimple_location (stmt)); |
b5b8b0ac AO |
5021 | |
5022 | if (DECL_P (var)) | |
5023 | mode = DECL_MODE (var); | |
5024 | else | |
5025 | mode = TYPE_MODE (TREE_TYPE (var)); | |
5026 | ||
5027 | val = gen_rtx_VAR_LOCATION | |
5028 | (mode, var, (rtx)value, VAR_INIT_STATUS_INITIALIZED); | |
5029 | ||
e16b6fd0 | 5030 | emit_debug_insn (val); |
b5b8b0ac AO |
5031 | |
5032 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5033 | { | |
5034 | /* We can't dump the insn with a TREE where an RTX | |
5035 | is expected. */ | |
e8c6bb74 | 5036 | PAT_VAR_LOCATION_LOC (val) = const0_rtx; |
b5b8b0ac | 5037 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
e8c6bb74 | 5038 | PAT_VAR_LOCATION_LOC (val) = (rtx)value; |
b5b8b0ac AO |
5039 | } |
5040 | ||
ec8c1492 | 5041 | delink_debug_stmt: |
2a8e30fb MM |
5042 | /* In order not to generate too many debug temporaries, |
5043 | we delink all uses of debug statements we already expanded. | |
5044 | Therefore debug statements between definition and real | |
5045 | use of TERed SSA names will continue to use the SSA name, | |
5046 | and not be replaced with debug temps. */ | |
5047 | delink_stmt_imm_use (stmt); | |
5048 | ||
b5b8b0ac AO |
5049 | gsi = nsi; |
5050 | gsi_next (&nsi); | |
5051 | if (gsi_end_p (nsi)) | |
5052 | break; | |
5053 | stmt = gsi_stmt (nsi); | |
5054 | if (!gimple_debug_bind_p (stmt)) | |
5055 | break; | |
5056 | } | |
5057 | ||
5368224f | 5058 | set_curr_insn_location (sloc); |
ddb555ed JJ |
5059 | } |
5060 | else if (gimple_debug_source_bind_p (stmt)) | |
5061 | { | |
5368224f | 5062 | location_t sloc = curr_insn_location (); |
ddb555ed JJ |
5063 | tree var = gimple_debug_source_bind_get_var (stmt); |
5064 | tree value = gimple_debug_source_bind_get_value (stmt); | |
5065 | rtx val; | |
5066 | enum machine_mode mode; | |
5067 | ||
5068 | last = get_last_insn (); | |
5069 | ||
5368224f | 5070 | set_curr_insn_location (gimple_location (stmt)); |
ddb555ed JJ |
5071 | |
5072 | mode = DECL_MODE (var); | |
5073 | ||
5074 | val = gen_rtx_VAR_LOCATION (mode, var, (rtx)value, | |
5075 | VAR_INIT_STATUS_UNINITIALIZED); | |
5076 | ||
5077 | emit_debug_insn (val); | |
5078 | ||
5079 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5080 | { | |
5081 | /* We can't dump the insn with a TREE where an RTX | |
5082 | is expected. */ | |
5083 | PAT_VAR_LOCATION_LOC (val) = const0_rtx; | |
5084 | maybe_dump_rtl_for_gimple_stmt (stmt, last); | |
5085 | PAT_VAR_LOCATION_LOC (val) = (rtx)value; | |
5086 | } | |
5087 | ||
5368224f | 5088 | set_curr_insn_location (sloc); |
b5b8b0ac | 5089 | } |
80c7a9eb | 5090 | else |
242229bb | 5091 | { |
f3ddd692 JJ |
5092 | if (is_gimple_call (stmt) |
5093 | && gimple_call_tail_p (stmt) | |
5094 | && disable_tail_calls) | |
5095 | gimple_call_set_tail (stmt, false); | |
5096 | ||
726a989a | 5097 | if (is_gimple_call (stmt) && gimple_call_tail_p (stmt)) |
cea49550 RH |
5098 | { |
5099 | bool can_fallthru; | |
5100 | new_bb = expand_gimple_tailcall (bb, stmt, &can_fallthru); | |
5101 | if (new_bb) | |
5102 | { | |
5103 | if (can_fallthru) | |
5104 | bb = new_bb; | |
5105 | else | |
5106 | return new_bb; | |
5107 | } | |
5108 | } | |
4d7a65ea | 5109 | else |
b7211528 | 5110 | { |
4e3825db | 5111 | def_operand_p def_p; |
4e3825db MM |
5112 | def_p = SINGLE_SSA_DEF_OPERAND (stmt, SSA_OP_DEF); |
5113 | ||
5114 | if (def_p != NULL) | |
5115 | { | |
5116 | /* Ignore this stmt if it is in the list of | |
5117 | replaceable expressions. */ | |
5118 | if (SA.values | |
b8698a0f | 5119 | && bitmap_bit_p (SA.values, |
e97809c6 | 5120 | SSA_NAME_VERSION (DEF_FROM_PTR (def_p)))) |
4e3825db MM |
5121 | continue; |
5122 | } | |
28ed065e | 5123 | last = expand_gimple_stmt (stmt); |
726a989a | 5124 | maybe_dump_rtl_for_gimple_stmt (stmt, last); |
b7211528 | 5125 | } |
242229bb JH |
5126 | } |
5127 | } | |
5128 | ||
a5883ba0 MM |
5129 | currently_expanding_gimple_stmt = NULL; |
5130 | ||
7241571e | 5131 | /* Expand implicit goto and convert goto_locus. */ |
a9b77cd1 ZD |
5132 | FOR_EACH_EDGE (e, ei, bb->succs) |
5133 | { | |
2f13f2de | 5134 | if (e->goto_locus != UNKNOWN_LOCATION) |
5368224f | 5135 | set_curr_insn_location (e->goto_locus); |
7241571e JJ |
5136 | if ((e->flags & EDGE_FALLTHRU) && e->dest != bb->next_bb) |
5137 | { | |
5138 | emit_jump (label_rtx_for_bb (e->dest)); | |
5139 | e->flags &= ~EDGE_FALLTHRU; | |
5140 | } | |
a9b77cd1 ZD |
5141 | } |
5142 | ||
ae761c45 AH |
5143 | /* Expanded RTL can create a jump in the last instruction of block. |
5144 | This later might be assumed to be a jump to successor and break edge insertion. | |
5145 | We need to insert dummy move to prevent this. PR41440. */ | |
5146 | if (single_succ_p (bb) | |
5147 | && (single_succ_edge (bb)->flags & EDGE_FALLTHRU) | |
5148 | && (last = get_last_insn ()) | |
5149 | && JUMP_P (last)) | |
5150 | { | |
5151 | rtx dummy = gen_reg_rtx (SImode); | |
5152 | emit_insn_after_noloc (gen_move_insn (dummy, dummy), last, NULL); | |
5153 | } | |
5154 | ||
242229bb JH |
5155 | do_pending_stack_adjust (); |
5156 | ||
3f117656 | 5157 | /* Find the block tail. The last insn in the block is the insn |
242229bb JH |
5158 | before a barrier and/or table jump insn. */ |
5159 | last = get_last_insn (); | |
4b4bf941 | 5160 | if (BARRIER_P (last)) |
242229bb JH |
5161 | last = PREV_INSN (last); |
5162 | if (JUMP_TABLE_DATA_P (last)) | |
5163 | last = PREV_INSN (PREV_INSN (last)); | |
5164 | BB_END (bb) = last; | |
caf93cb0 | 5165 | |
242229bb | 5166 | update_bb_for_insn (bb); |
80c7a9eb | 5167 | |
242229bb JH |
5168 | return bb; |
5169 | } | |
5170 | ||
5171 | ||
5172 | /* Create a basic block for initialization code. */ | |
5173 | ||
5174 | static basic_block | |
5175 | construct_init_block (void) | |
5176 | { | |
5177 | basic_block init_block, first_block; | |
fd44f634 JH |
5178 | edge e = NULL; |
5179 | int flags; | |
275a4187 | 5180 | |
fd44f634 JH |
5181 | /* Multiple entry points not supported yet. */ |
5182 | gcc_assert (EDGE_COUNT (ENTRY_BLOCK_PTR->succs) == 1); | |
5e2d947c JH |
5183 | init_rtl_bb_info (ENTRY_BLOCK_PTR); |
5184 | init_rtl_bb_info (EXIT_BLOCK_PTR); | |
5185 | ENTRY_BLOCK_PTR->flags |= BB_RTL; | |
5186 | EXIT_BLOCK_PTR->flags |= BB_RTL; | |
242229bb | 5187 | |
fd44f634 | 5188 | e = EDGE_SUCC (ENTRY_BLOCK_PTR, 0); |
275a4187 | 5189 | |
fd44f634 JH |
5190 | /* When entry edge points to first basic block, we don't need jump, |
5191 | otherwise we have to jump into proper target. */ | |
5192 | if (e && e->dest != ENTRY_BLOCK_PTR->next_bb) | |
5193 | { | |
726a989a | 5194 | tree label = gimple_block_label (e->dest); |
fd44f634 JH |
5195 | |
5196 | emit_jump (label_rtx (label)); | |
5197 | flags = 0; | |
275a4187 | 5198 | } |
fd44f634 JH |
5199 | else |
5200 | flags = EDGE_FALLTHRU; | |
242229bb JH |
5201 | |
5202 | init_block = create_basic_block (NEXT_INSN (get_insns ()), | |
5203 | get_last_insn (), | |
5204 | ENTRY_BLOCK_PTR); | |
5205 | init_block->frequency = ENTRY_BLOCK_PTR->frequency; | |
5206 | init_block->count = ENTRY_BLOCK_PTR->count; | |
7d776ee2 RG |
5207 | if (current_loops && ENTRY_BLOCK_PTR->loop_father) |
5208 | add_bb_to_loop (init_block, ENTRY_BLOCK_PTR->loop_father); | |
242229bb JH |
5209 | if (e) |
5210 | { | |
5211 | first_block = e->dest; | |
5212 | redirect_edge_succ (e, init_block); | |
fd44f634 | 5213 | e = make_edge (init_block, first_block, flags); |
242229bb JH |
5214 | } |
5215 | else | |
5216 | e = make_edge (init_block, EXIT_BLOCK_PTR, EDGE_FALLTHRU); | |
5217 | e->probability = REG_BR_PROB_BASE; | |
5218 | e->count = ENTRY_BLOCK_PTR->count; | |
5219 | ||
5220 | update_bb_for_insn (init_block); | |
5221 | return init_block; | |
5222 | } | |
5223 | ||
55e092c4 JH |
5224 | /* For each lexical block, set BLOCK_NUMBER to the depth at which it is |
5225 | found in the block tree. */ | |
5226 | ||
5227 | static void | |
5228 | set_block_levels (tree block, int level) | |
5229 | { | |
5230 | while (block) | |
5231 | { | |
5232 | BLOCK_NUMBER (block) = level; | |
5233 | set_block_levels (BLOCK_SUBBLOCKS (block), level + 1); | |
5234 | block = BLOCK_CHAIN (block); | |
5235 | } | |
5236 | } | |
242229bb JH |
5237 | |
5238 | /* Create a block containing landing pads and similar stuff. */ | |
5239 | ||
5240 | static void | |
5241 | construct_exit_block (void) | |
5242 | { | |
5243 | rtx head = get_last_insn (); | |
5244 | rtx end; | |
5245 | basic_block exit_block; | |
628f6a4e BE |
5246 | edge e, e2; |
5247 | unsigned ix; | |
5248 | edge_iterator ei; | |
071a42f9 | 5249 | rtx orig_end = BB_END (EXIT_BLOCK_PTR->prev_bb); |
242229bb | 5250 | |
bf08ebeb JH |
5251 | rtl_profile_for_bb (EXIT_BLOCK_PTR); |
5252 | ||
caf93cb0 | 5253 | /* Make sure the locus is set to the end of the function, so that |
242229bb | 5254 | epilogue line numbers and warnings are set properly. */ |
2f13f2de | 5255 | if (LOCATION_LOCUS (cfun->function_end_locus) != UNKNOWN_LOCATION) |
242229bb JH |
5256 | input_location = cfun->function_end_locus; |
5257 | ||
242229bb JH |
5258 | /* Generate rtl for function exit. */ |
5259 | expand_function_end (); | |
5260 | ||
5261 | end = get_last_insn (); | |
5262 | if (head == end) | |
5263 | return; | |
071a42f9 JH |
5264 | /* While emitting the function end we could move end of the last basic block. |
5265 | */ | |
5266 | BB_END (EXIT_BLOCK_PTR->prev_bb) = orig_end; | |
4b4bf941 | 5267 | while (NEXT_INSN (head) && NOTE_P (NEXT_INSN (head))) |
242229bb | 5268 | head = NEXT_INSN (head); |
80c7a9eb RH |
5269 | exit_block = create_basic_block (NEXT_INSN (head), end, |
5270 | EXIT_BLOCK_PTR->prev_bb); | |
242229bb JH |
5271 | exit_block->frequency = EXIT_BLOCK_PTR->frequency; |
5272 | exit_block->count = EXIT_BLOCK_PTR->count; | |
7d776ee2 RG |
5273 | if (current_loops && EXIT_BLOCK_PTR->loop_father) |
5274 | add_bb_to_loop (exit_block, EXIT_BLOCK_PTR->loop_father); | |
628f6a4e BE |
5275 | |
5276 | ix = 0; | |
5277 | while (ix < EDGE_COUNT (EXIT_BLOCK_PTR->preds)) | |
242229bb | 5278 | { |
8fb790fd | 5279 | e = EDGE_PRED (EXIT_BLOCK_PTR, ix); |
242229bb | 5280 | if (!(e->flags & EDGE_ABNORMAL)) |
628f6a4e BE |
5281 | redirect_edge_succ (e, exit_block); |
5282 | else | |
5283 | ix++; | |
242229bb | 5284 | } |
628f6a4e | 5285 | |
242229bb JH |
5286 | e = make_edge (exit_block, EXIT_BLOCK_PTR, EDGE_FALLTHRU); |
5287 | e->probability = REG_BR_PROB_BASE; | |
5288 | e->count = EXIT_BLOCK_PTR->count; | |
628f6a4e | 5289 | FOR_EACH_EDGE (e2, ei, EXIT_BLOCK_PTR->preds) |
242229bb JH |
5290 | if (e2 != e) |
5291 | { | |
c22cacf3 | 5292 | e->count -= e2->count; |
242229bb JH |
5293 | exit_block->count -= e2->count; |
5294 | exit_block->frequency -= EDGE_FREQUENCY (e2); | |
5295 | } | |
5296 | if (e->count < 0) | |
5297 | e->count = 0; | |
5298 | if (exit_block->count < 0) | |
5299 | exit_block->count = 0; | |
5300 | if (exit_block->frequency < 0) | |
5301 | exit_block->frequency = 0; | |
5302 | update_bb_for_insn (exit_block); | |
5303 | } | |
5304 | ||
c22cacf3 | 5305 | /* Helper function for discover_nonconstant_array_refs. |
a1b23b2f UW |
5306 | Look for ARRAY_REF nodes with non-constant indexes and mark them |
5307 | addressable. */ | |
5308 | ||
5309 | static tree | |
5310 | discover_nonconstant_array_refs_r (tree * tp, int *walk_subtrees, | |
5311 | void *data ATTRIBUTE_UNUSED) | |
5312 | { | |
5313 | tree t = *tp; | |
5314 | ||
5315 | if (IS_TYPE_OR_DECL_P (t)) | |
5316 | *walk_subtrees = 0; | |
5317 | else if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5318 | { | |
5319 | while (((TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5320 | && is_gimple_min_invariant (TREE_OPERAND (t, 1)) | |
5321 | && (!TREE_OPERAND (t, 2) | |
5322 | || is_gimple_min_invariant (TREE_OPERAND (t, 2)))) | |
5323 | || (TREE_CODE (t) == COMPONENT_REF | |
5324 | && (!TREE_OPERAND (t,2) | |
5325 | || is_gimple_min_invariant (TREE_OPERAND (t, 2)))) | |
5326 | || TREE_CODE (t) == BIT_FIELD_REF | |
5327 | || TREE_CODE (t) == REALPART_EXPR | |
5328 | || TREE_CODE (t) == IMAGPART_EXPR | |
5329 | || TREE_CODE (t) == VIEW_CONVERT_EXPR | |
1043771b | 5330 | || CONVERT_EXPR_P (t)) |
a1b23b2f UW |
5331 | t = TREE_OPERAND (t, 0); |
5332 | ||
5333 | if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) | |
5334 | { | |
5335 | t = get_base_address (t); | |
6f11d690 RG |
5336 | if (t && DECL_P (t) |
5337 | && DECL_MODE (t) != BLKmode) | |
a1b23b2f UW |
5338 | TREE_ADDRESSABLE (t) = 1; |
5339 | } | |
5340 | ||
5341 | *walk_subtrees = 0; | |
5342 | } | |
5343 | ||
5344 | return NULL_TREE; | |
5345 | } | |
5346 | ||
5347 | /* RTL expansion is not able to compile array references with variable | |
5348 | offsets for arrays stored in single register. Discover such | |
5349 | expressions and mark variables as addressable to avoid this | |
5350 | scenario. */ | |
5351 | ||
5352 | static void | |
5353 | discover_nonconstant_array_refs (void) | |
5354 | { | |
5355 | basic_block bb; | |
726a989a | 5356 | gimple_stmt_iterator gsi; |
a1b23b2f UW |
5357 | |
5358 | FOR_EACH_BB (bb) | |
726a989a RB |
5359 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
5360 | { | |
5361 | gimple stmt = gsi_stmt (gsi); | |
aa847cc8 JJ |
5362 | if (!is_gimple_debug (stmt)) |
5363 | walk_gimple_op (stmt, discover_nonconstant_array_refs_r, NULL); | |
726a989a | 5364 | } |
a1b23b2f UW |
5365 | } |
5366 | ||
2e3f842f L |
5367 | /* This function sets crtl->args.internal_arg_pointer to a virtual |
5368 | register if DRAP is needed. Local register allocator will replace | |
5369 | virtual_incoming_args_rtx with the virtual register. */ | |
5370 | ||
5371 | static void | |
5372 | expand_stack_alignment (void) | |
5373 | { | |
5374 | rtx drap_rtx; | |
e939805b | 5375 | unsigned int preferred_stack_boundary; |
2e3f842f L |
5376 | |
5377 | if (! SUPPORTS_STACK_ALIGNMENT) | |
5378 | return; | |
b8698a0f | 5379 | |
2e3f842f L |
5380 | if (cfun->calls_alloca |
5381 | || cfun->has_nonlocal_label | |
5382 | || crtl->has_nonlocal_goto) | |
5383 | crtl->need_drap = true; | |
5384 | ||
890b9b96 L |
5385 | /* Call update_stack_boundary here again to update incoming stack |
5386 | boundary. It may set incoming stack alignment to a different | |
5387 | value after RTL expansion. TARGET_FUNCTION_OK_FOR_SIBCALL may | |
5388 | use the minimum incoming stack alignment to check if it is OK | |
5389 | to perform sibcall optimization since sibcall optimization will | |
5390 | only align the outgoing stack to incoming stack boundary. */ | |
5391 | if (targetm.calls.update_stack_boundary) | |
5392 | targetm.calls.update_stack_boundary (); | |
5393 | ||
5394 | /* The incoming stack frame has to be aligned at least at | |
5395 | parm_stack_boundary. */ | |
5396 | gcc_assert (crtl->parm_stack_boundary <= INCOMING_STACK_BOUNDARY); | |
2e3f842f | 5397 | |
2e3f842f L |
5398 | /* Update crtl->stack_alignment_estimated and use it later to align |
5399 | stack. We check PREFERRED_STACK_BOUNDARY if there may be non-call | |
5400 | exceptions since callgraph doesn't collect incoming stack alignment | |
5401 | in this case. */ | |
8f4f502f | 5402 | if (cfun->can_throw_non_call_exceptions |
2e3f842f L |
5403 | && PREFERRED_STACK_BOUNDARY > crtl->preferred_stack_boundary) |
5404 | preferred_stack_boundary = PREFERRED_STACK_BOUNDARY; | |
5405 | else | |
5406 | preferred_stack_boundary = crtl->preferred_stack_boundary; | |
5407 | if (preferred_stack_boundary > crtl->stack_alignment_estimated) | |
5408 | crtl->stack_alignment_estimated = preferred_stack_boundary; | |
5409 | if (preferred_stack_boundary > crtl->stack_alignment_needed) | |
5410 | crtl->stack_alignment_needed = preferred_stack_boundary; | |
5411 | ||
890b9b96 L |
5412 | gcc_assert (crtl->stack_alignment_needed |
5413 | <= crtl->stack_alignment_estimated); | |
5414 | ||
2e3f842f | 5415 | crtl->stack_realign_needed |
e939805b | 5416 | = INCOMING_STACK_BOUNDARY < crtl->stack_alignment_estimated; |
d2d93c32 | 5417 | crtl->stack_realign_tried = crtl->stack_realign_needed; |
2e3f842f L |
5418 | |
5419 | crtl->stack_realign_processed = true; | |
5420 | ||
5421 | /* Target has to redefine TARGET_GET_DRAP_RTX to support stack | |
5422 | alignment. */ | |
5423 | gcc_assert (targetm.calls.get_drap_rtx != NULL); | |
b8698a0f | 5424 | drap_rtx = targetm.calls.get_drap_rtx (); |
2e3f842f | 5425 | |
d015f7cc L |
5426 | /* stack_realign_drap and drap_rtx must match. */ |
5427 | gcc_assert ((stack_realign_drap != 0) == (drap_rtx != NULL)); | |
5428 | ||
2e3f842f L |
5429 | /* Do nothing if NULL is returned, which means DRAP is not needed. */ |
5430 | if (NULL != drap_rtx) | |
5431 | { | |
5432 | crtl->args.internal_arg_pointer = drap_rtx; | |
5433 | ||
5434 | /* Call fixup_tail_calls to clean up REG_EQUIV note if DRAP is | |
5435 | needed. */ | |
5436 | fixup_tail_calls (); | |
5437 | } | |
5438 | } | |
862d0b35 DN |
5439 | \f |
5440 | ||
5441 | static void | |
5442 | expand_main_function (void) | |
5443 | { | |
5444 | #if (defined(INVOKE__main) \ | |
5445 | || (!defined(HAS_INIT_SECTION) \ | |
5446 | && !defined(INIT_SECTION_ASM_OP) \ | |
5447 | && !defined(INIT_ARRAY_SECTION_ASM_OP))) | |
5448 | emit_library_call (init_one_libfunc (NAME__MAIN), LCT_NORMAL, VOIDmode, 0); | |
5449 | #endif | |
5450 | } | |
5451 | \f | |
5452 | ||
5453 | /* Expand code to initialize the stack_protect_guard. This is invoked at | |
5454 | the beginning of a function to be protected. */ | |
5455 | ||
5456 | #ifndef HAVE_stack_protect_set | |
5457 | # define HAVE_stack_protect_set 0 | |
5458 | # define gen_stack_protect_set(x,y) (gcc_unreachable (), NULL_RTX) | |
5459 | #endif | |
5460 | ||
5461 | static void | |
5462 | stack_protect_prologue (void) | |
5463 | { | |
5464 | tree guard_decl = targetm.stack_protect_guard (); | |
5465 | rtx x, y; | |
5466 | ||
5467 | x = expand_normal (crtl->stack_protect_guard); | |
5468 | y = expand_normal (guard_decl); | |
5469 | ||
5470 | /* Allow the target to copy from Y to X without leaking Y into a | |
5471 | register. */ | |
5472 | if (HAVE_stack_protect_set) | |
5473 | { | |
5474 | rtx insn = gen_stack_protect_set (x, y); | |
5475 | if (insn) | |
5476 | { | |
5477 | emit_insn (insn); | |
5478 | return; | |
5479 | } | |
5480 | } | |
5481 | ||
5482 | /* Otherwise do a straight move. */ | |
5483 | emit_move_insn (x, y); | |
5484 | } | |
2e3f842f | 5485 | |
242229bb JH |
5486 | /* Translate the intermediate representation contained in the CFG |
5487 | from GIMPLE trees to RTL. | |
5488 | ||
5489 | We do conversion per basic block and preserve/update the tree CFG. | |
5490 | This implies we have to do some magic as the CFG can simultaneously | |
5491 | consist of basic blocks containing RTL and GIMPLE trees. This can | |
61ada8ae | 5492 | confuse the CFG hooks, so be careful to not manipulate CFG during |
242229bb JH |
5493 | the expansion. */ |
5494 | ||
c2924966 | 5495 | static unsigned int |
726a989a | 5496 | gimple_expand_cfg (void) |
242229bb JH |
5497 | { |
5498 | basic_block bb, init_block; | |
5499 | sbitmap blocks; | |
0ef90296 ZD |
5500 | edge_iterator ei; |
5501 | edge e; | |
f3ddd692 | 5502 | rtx var_seq, var_ret_seq; |
4e3825db MM |
5503 | unsigned i; |
5504 | ||
f029db69 | 5505 | timevar_push (TV_OUT_OF_SSA); |
4e3825db | 5506 | rewrite_out_of_ssa (&SA); |
f029db69 | 5507 | timevar_pop (TV_OUT_OF_SSA); |
c302207e | 5508 | SA.partition_to_pseudo = XCNEWVEC (rtx, SA.map->num_partitions); |
242229bb | 5509 | |
be147e84 RG |
5510 | /* Make sure all values used by the optimization passes have sane |
5511 | defaults. */ | |
5512 | reg_renumber = 0; | |
5513 | ||
4586b4ca SB |
5514 | /* Some backends want to know that we are expanding to RTL. */ |
5515 | currently_expanding_to_rtl = 1; | |
cd7d9fd7 RG |
5516 | /* Dominators are not kept up-to-date as we may create new basic-blocks. */ |
5517 | free_dominance_info (CDI_DOMINATORS); | |
4586b4ca | 5518 | |
bf08ebeb JH |
5519 | rtl_profile_for_bb (ENTRY_BLOCK_PTR); |
5520 | ||
5368224f | 5521 | insn_locations_init (); |
fe8a7779 | 5522 | if (!DECL_IS_BUILTIN (current_function_decl)) |
1751ecd6 AH |
5523 | { |
5524 | /* Eventually, all FEs should explicitly set function_start_locus. */ | |
2f13f2de | 5525 | if (LOCATION_LOCUS (cfun->function_start_locus) == UNKNOWN_LOCATION) |
5368224f | 5526 | set_curr_insn_location |
1751ecd6 AH |
5527 | (DECL_SOURCE_LOCATION (current_function_decl)); |
5528 | else | |
5368224f | 5529 | set_curr_insn_location (cfun->function_start_locus); |
1751ecd6 | 5530 | } |
9ff70652 | 5531 | else |
5368224f DC |
5532 | set_curr_insn_location (UNKNOWN_LOCATION); |
5533 | prologue_location = curr_insn_location (); | |
55e092c4 | 5534 | |
2b21299c JJ |
5535 | #ifdef INSN_SCHEDULING |
5536 | init_sched_attrs (); | |
5537 | #endif | |
5538 | ||
55e092c4 JH |
5539 | /* Make sure first insn is a note even if we don't want linenums. |
5540 | This makes sure the first insn will never be deleted. | |
5541 | Also, final expects a note to appear there. */ | |
5542 | emit_note (NOTE_INSN_DELETED); | |
6429e3be | 5543 | |
a1b23b2f UW |
5544 | /* Mark arrays indexed with non-constant indices with TREE_ADDRESSABLE. */ |
5545 | discover_nonconstant_array_refs (); | |
5546 | ||
e41b2a33 | 5547 | targetm.expand_to_rtl_hook (); |
cb91fab0 | 5548 | crtl->stack_alignment_needed = STACK_BOUNDARY; |
2e3f842f | 5549 | crtl->max_used_stack_slot_alignment = STACK_BOUNDARY; |
890b9b96 | 5550 | crtl->stack_alignment_estimated = 0; |
cb91fab0 JH |
5551 | crtl->preferred_stack_boundary = STACK_BOUNDARY; |
5552 | cfun->cfg->max_jumptable_ents = 0; | |
5553 | ||
ae9fd6b7 JH |
5554 | /* Resovle the function section. Some targets, like ARM EABI rely on knowledge |
5555 | of the function section at exapnsion time to predict distance of calls. */ | |
5556 | resolve_unique_section (current_function_decl, 0, flag_function_sections); | |
5557 | ||
727a31fa | 5558 | /* Expand the variables recorded during gimple lowering. */ |
f029db69 | 5559 | timevar_push (TV_VAR_EXPAND); |
3a42502d RH |
5560 | start_sequence (); |
5561 | ||
f3ddd692 | 5562 | var_ret_seq = expand_used_vars (); |
3a42502d RH |
5563 | |
5564 | var_seq = get_insns (); | |
5565 | end_sequence (); | |
f029db69 | 5566 | timevar_pop (TV_VAR_EXPAND); |
242229bb | 5567 | |
7d69de61 RH |
5568 | /* Honor stack protection warnings. */ |
5569 | if (warn_stack_protect) | |
5570 | { | |
e3b5732b | 5571 | if (cfun->calls_alloca) |
b8698a0f | 5572 | warning (OPT_Wstack_protector, |
3b123595 SB |
5573 | "stack protector not protecting local variables: " |
5574 | "variable length buffer"); | |
cb91fab0 | 5575 | if (has_short_buffer && !crtl->stack_protect_guard) |
b8698a0f | 5576 | warning (OPT_Wstack_protector, |
3b123595 SB |
5577 | "stack protector not protecting function: " |
5578 | "all local arrays are less than %d bytes long", | |
7d69de61 RH |
5579 | (int) PARAM_VALUE (PARAM_SSP_BUFFER_SIZE)); |
5580 | } | |
5581 | ||
242229bb | 5582 | /* Set up parameters and prepare for return, for the function. */ |
b79c5284 | 5583 | expand_function_start (current_function_decl); |
242229bb | 5584 | |
3a42502d RH |
5585 | /* If we emitted any instructions for setting up the variables, |
5586 | emit them before the FUNCTION_START note. */ | |
5587 | if (var_seq) | |
5588 | { | |
5589 | emit_insn_before (var_seq, parm_birth_insn); | |
5590 | ||
5591 | /* In expand_function_end we'll insert the alloca save/restore | |
5592 | before parm_birth_insn. We've just insertted an alloca call. | |
5593 | Adjust the pointer to match. */ | |
5594 | parm_birth_insn = var_seq; | |
5595 | } | |
5596 | ||
4e3825db MM |
5597 | /* Now that we also have the parameter RTXs, copy them over to our |
5598 | partitions. */ | |
5599 | for (i = 0; i < SA.map->num_partitions; i++) | |
5600 | { | |
5601 | tree var = SSA_NAME_VAR (partition_to_var (SA.map, i)); | |
5602 | ||
5603 | if (TREE_CODE (var) != VAR_DECL | |
5604 | && !SA.partition_to_pseudo[i]) | |
5605 | SA.partition_to_pseudo[i] = DECL_RTL_IF_SET (var); | |
5606 | gcc_assert (SA.partition_to_pseudo[i]); | |
eb7adebc MM |
5607 | |
5608 | /* If this decl was marked as living in multiple places, reset | |
5609 | this now to NULL. */ | |
5610 | if (DECL_RTL_IF_SET (var) == pc_rtx) | |
5611 | SET_DECL_RTL (var, NULL); | |
5612 | ||
4e3825db MM |
5613 | /* Some RTL parts really want to look at DECL_RTL(x) when x |
5614 | was a decl marked in REG_ATTR or MEM_ATTR. We could use | |
5615 | SET_DECL_RTL here making this available, but that would mean | |
5616 | to select one of the potentially many RTLs for one DECL. Instead | |
5617 | of doing that we simply reset the MEM_EXPR of the RTL in question, | |
5618 | then nobody can get at it and hence nobody can call DECL_RTL on it. */ | |
5619 | if (!DECL_RTL_SET_P (var)) | |
5620 | { | |
5621 | if (MEM_P (SA.partition_to_pseudo[i])) | |
5622 | set_mem_expr (SA.partition_to_pseudo[i], NULL); | |
5623 | } | |
5624 | } | |
5625 | ||
d466b407 MM |
5626 | /* If we have a class containing differently aligned pointers |
5627 | we need to merge those into the corresponding RTL pointer | |
5628 | alignment. */ | |
5629 | for (i = 1; i < num_ssa_names; i++) | |
5630 | { | |
5631 | tree name = ssa_name (i); | |
5632 | int part; | |
5633 | rtx r; | |
5634 | ||
5635 | if (!name | |
d466b407 MM |
5636 | /* We might have generated new SSA names in |
5637 | update_alias_info_with_stack_vars. They will have a NULL | |
5638 | defining statements, and won't be part of the partitioning, | |
5639 | so ignore those. */ | |
5640 | || !SSA_NAME_DEF_STMT (name)) | |
5641 | continue; | |
5642 | part = var_to_partition (SA.map, name); | |
5643 | if (part == NO_PARTITION) | |
5644 | continue; | |
70b5e7dc RG |
5645 | |
5646 | /* Adjust all partition members to get the underlying decl of | |
5647 | the representative which we might have created in expand_one_var. */ | |
5648 | if (SSA_NAME_VAR (name) == NULL_TREE) | |
5649 | { | |
5650 | tree leader = partition_to_var (SA.map, part); | |
5651 | gcc_assert (SSA_NAME_VAR (leader) != NULL_TREE); | |
5652 | replace_ssa_name_symbol (name, SSA_NAME_VAR (leader)); | |
5653 | } | |
5654 | if (!POINTER_TYPE_P (TREE_TYPE (name))) | |
5655 | continue; | |
5656 | ||
d466b407 MM |
5657 | r = SA.partition_to_pseudo[part]; |
5658 | if (REG_P (r)) | |
5659 | mark_reg_pointer (r, get_pointer_alignment (name)); | |
5660 | } | |
5661 | ||
242229bb JH |
5662 | /* If this function is `main', emit a call to `__main' |
5663 | to run global initializers, etc. */ | |
5664 | if (DECL_NAME (current_function_decl) | |
5665 | && MAIN_NAME_P (DECL_NAME (current_function_decl)) | |
5666 | && DECL_FILE_SCOPE_P (current_function_decl)) | |
5667 | expand_main_function (); | |
5668 | ||
7d69de61 RH |
5669 | /* Initialize the stack_protect_guard field. This must happen after the |
5670 | call to __main (if any) so that the external decl is initialized. */ | |
cb91fab0 | 5671 | if (crtl->stack_protect_guard) |
7d69de61 RH |
5672 | stack_protect_prologue (); |
5673 | ||
4e3825db MM |
5674 | expand_phi_nodes (&SA); |
5675 | ||
3fbd86b1 | 5676 | /* Register rtl specific functions for cfg. */ |
242229bb JH |
5677 | rtl_register_cfg_hooks (); |
5678 | ||
5679 | init_block = construct_init_block (); | |
5680 | ||
0ef90296 | 5681 | /* Clear EDGE_EXECUTABLE on the entry edge(s). It is cleaned from the |
4e3825db | 5682 | remaining edges later. */ |
0ef90296 ZD |
5683 | FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs) |
5684 | e->flags &= ~EDGE_EXECUTABLE; | |
5685 | ||
8b11009b | 5686 | lab_rtx_for_bb = pointer_map_create (); |
242229bb | 5687 | FOR_BB_BETWEEN (bb, init_block->next_bb, EXIT_BLOCK_PTR, next_bb) |
f3ddd692 | 5688 | bb = expand_gimple_basic_block (bb, var_ret_seq != NULL_RTX); |
bf08ebeb | 5689 | |
b5b8b0ac AO |
5690 | if (MAY_HAVE_DEBUG_INSNS) |
5691 | expand_debug_locations (); | |
5692 | ||
452aa9c5 RG |
5693 | /* Free stuff we no longer need after GIMPLE optimizations. */ |
5694 | free_dominance_info (CDI_DOMINATORS); | |
5695 | free_dominance_info (CDI_POST_DOMINATORS); | |
5696 | delete_tree_cfg_annotations (); | |
5697 | ||
f029db69 | 5698 | timevar_push (TV_OUT_OF_SSA); |
4e3825db | 5699 | finish_out_of_ssa (&SA); |
f029db69 | 5700 | timevar_pop (TV_OUT_OF_SSA); |
4e3825db | 5701 | |
f029db69 | 5702 | timevar_push (TV_POST_EXPAND); |
91753e21 RG |
5703 | /* We are no longer in SSA form. */ |
5704 | cfun->gimple_df->in_ssa_p = false; | |
7d776ee2 RG |
5705 | if (current_loops) |
5706 | loops_state_clear (LOOP_CLOSED_SSA); | |
91753e21 | 5707 | |
bf08ebeb JH |
5708 | /* Expansion is used by optimization passes too, set maybe_hot_insn_p |
5709 | conservatively to true until they are all profile aware. */ | |
8b11009b | 5710 | pointer_map_destroy (lab_rtx_for_bb); |
cb91fab0 | 5711 | free_histograms (); |
242229bb JH |
5712 | |
5713 | construct_exit_block (); | |
5368224f | 5714 | insn_locations_finalize (); |
242229bb | 5715 | |
f3ddd692 JJ |
5716 | if (var_ret_seq) |
5717 | { | |
5718 | rtx after = return_label; | |
5719 | rtx next = NEXT_INSN (after); | |
5720 | if (next && NOTE_INSN_BASIC_BLOCK_P (next)) | |
5721 | after = next; | |
5722 | emit_insn_after (var_ret_seq, after); | |
5723 | } | |
5724 | ||
1d65f45c | 5725 | /* Zap the tree EH table. */ |
e8a2a782 | 5726 | set_eh_throw_stmt_table (cfun, NULL); |
242229bb | 5727 | |
42821aff MM |
5728 | /* We need JUMP_LABEL be set in order to redirect jumps, and hence |
5729 | split edges which edge insertions might do. */ | |
242229bb | 5730 | rebuild_jump_labels (get_insns ()); |
242229bb | 5731 | |
4e3825db MM |
5732 | FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR, next_bb) |
5733 | { | |
5734 | edge e; | |
5735 | edge_iterator ei; | |
5736 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) | |
5737 | { | |
5738 | if (e->insns.r) | |
bc470c24 | 5739 | { |
42821aff | 5740 | rebuild_jump_labels_chain (e->insns.r); |
e40191f1 TV |
5741 | /* Put insns after parm birth, but before |
5742 | NOTE_INSNS_FUNCTION_BEG. */ | |
bc470c24 | 5743 | if (e->src == ENTRY_BLOCK_PTR |
e40191f1 | 5744 | && single_succ_p (ENTRY_BLOCK_PTR)) |
bc470c24 JJ |
5745 | { |
5746 | rtx insns = e->insns.r; | |
5747 | e->insns.r = NULL_RTX; | |
e40191f1 TV |
5748 | if (NOTE_P (parm_birth_insn) |
5749 | && NOTE_KIND (parm_birth_insn) == NOTE_INSN_FUNCTION_BEG) | |
5750 | emit_insn_before_noloc (insns, parm_birth_insn, e->dest); | |
5751 | else | |
5752 | emit_insn_after_noloc (insns, parm_birth_insn, e->dest); | |
bc470c24 JJ |
5753 | } |
5754 | else | |
5755 | commit_one_edge_insertion (e); | |
5756 | } | |
4e3825db MM |
5757 | else |
5758 | ei_next (&ei); | |
5759 | } | |
5760 | } | |
5761 | ||
5762 | /* We're done expanding trees to RTL. */ | |
5763 | currently_expanding_to_rtl = 0; | |
5764 | ||
5765 | FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR->next_bb, EXIT_BLOCK_PTR, next_bb) | |
5766 | { | |
5767 | edge e; | |
5768 | edge_iterator ei; | |
5769 | for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ) | |
5770 | { | |
5771 | /* Clear EDGE_EXECUTABLE. This flag is never used in the backend. */ | |
5772 | e->flags &= ~EDGE_EXECUTABLE; | |
5773 | ||
5774 | /* At the moment not all abnormal edges match the RTL | |
5775 | representation. It is safe to remove them here as | |
5776 | find_many_sub_basic_blocks will rediscover them. | |
5777 | In the future we should get this fixed properly. */ | |
5778 | if ((e->flags & EDGE_ABNORMAL) | |
5779 | && !(e->flags & EDGE_SIBCALL)) | |
5780 | remove_edge (e); | |
5781 | else | |
5782 | ei_next (&ei); | |
5783 | } | |
5784 | } | |
5785 | ||
242229bb | 5786 | blocks = sbitmap_alloc (last_basic_block); |
f61e445a | 5787 | bitmap_ones (blocks); |
242229bb | 5788 | find_many_sub_basic_blocks (blocks); |
242229bb | 5789 | sbitmap_free (blocks); |
4e3825db | 5790 | purge_all_dead_edges (); |
242229bb | 5791 | |
2e3f842f L |
5792 | expand_stack_alignment (); |
5793 | ||
be147e84 RG |
5794 | /* Fixup REG_EQUIV notes in the prologue if there are tailcalls in this |
5795 | function. */ | |
5796 | if (crtl->tail_call_emit) | |
5797 | fixup_tail_calls (); | |
5798 | ||
dac1fbf8 RG |
5799 | /* After initial rtl generation, call back to finish generating |
5800 | exception support code. We need to do this before cleaning up | |
5801 | the CFG as the code does not expect dead landing pads. */ | |
5802 | if (cfun->eh->region_tree != NULL) | |
5803 | finish_eh_generation (); | |
5804 | ||
5805 | /* Remove unreachable blocks, otherwise we cannot compute dominators | |
5806 | which are needed for loop state verification. As a side-effect | |
5807 | this also compacts blocks. | |
5808 | ??? We cannot remove trivially dead insns here as for example | |
5809 | the DRAP reg on i?86 is not magically live at this point. | |
5810 | gcc.c-torture/execute/ipa-sra-2.c execution, -Os -m32 fails otherwise. */ | |
5811 | cleanup_cfg (CLEANUP_NO_INSN_DEL); | |
5812 | ||
242229bb | 5813 | #ifdef ENABLE_CHECKING |
62e5bf5d | 5814 | verify_flow_info (); |
242229bb | 5815 | #endif |
9f8628ba | 5816 | |
be147e84 RG |
5817 | /* Initialize pseudos allocated for hard registers. */ |
5818 | emit_initial_value_sets (); | |
5819 | ||
5820 | /* And finally unshare all RTL. */ | |
5821 | unshare_all_rtl (); | |
5822 | ||
9f8628ba PB |
5823 | /* There's no need to defer outputting this function any more; we |
5824 | know we want to output it. */ | |
5825 | DECL_DEFER_OUTPUT (current_function_decl) = 0; | |
5826 | ||
5827 | /* Now that we're done expanding trees to RTL, we shouldn't have any | |
5828 | more CONCATs anywhere. */ | |
5829 | generating_concat_p = 0; | |
5830 | ||
b7211528 SB |
5831 | if (dump_file) |
5832 | { | |
5833 | fprintf (dump_file, | |
5834 | "\n\n;;\n;; Full RTL generated for this function:\n;;\n"); | |
5835 | /* And the pass manager will dump RTL for us. */ | |
5836 | } | |
ef330312 PB |
5837 | |
5838 | /* If we're emitting a nested function, make sure its parent gets | |
5839 | emitted as well. Doing otherwise confuses debug info. */ | |
c22cacf3 | 5840 | { |
ef330312 PB |
5841 | tree parent; |
5842 | for (parent = DECL_CONTEXT (current_function_decl); | |
c22cacf3 MS |
5843 | parent != NULL_TREE; |
5844 | parent = get_containing_scope (parent)) | |
ef330312 | 5845 | if (TREE_CODE (parent) == FUNCTION_DECL) |
c22cacf3 | 5846 | TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (parent)) = 1; |
ef330312 | 5847 | } |
c22cacf3 | 5848 | |
ef330312 PB |
5849 | /* We are now committed to emitting code for this function. Do any |
5850 | preparation, such as emitting abstract debug info for the inline | |
5851 | before it gets mangled by optimization. */ | |
5852 | if (cgraph_function_possibly_inlined_p (current_function_decl)) | |
5853 | (*debug_hooks->outlining_inline_function) (current_function_decl); | |
5854 | ||
5855 | TREE_ASM_WRITTEN (current_function_decl) = 1; | |
4bb1e037 AP |
5856 | |
5857 | /* After expanding, the return labels are no longer needed. */ | |
5858 | return_label = NULL; | |
5859 | naked_return_label = NULL; | |
0a35513e AH |
5860 | |
5861 | /* After expanding, the tm_restart map is no longer needed. */ | |
5862 | if (cfun->gimple_df->tm_restart) | |
5863 | { | |
5864 | htab_delete (cfun->gimple_df->tm_restart); | |
5865 | cfun->gimple_df->tm_restart = NULL; | |
5866 | } | |
5867 | ||
55e092c4 JH |
5868 | /* Tag the blocks with a depth number so that change_scope can find |
5869 | the common parent easily. */ | |
5870 | set_block_levels (DECL_INITIAL (cfun->decl), 0); | |
bf08ebeb | 5871 | default_rtl_profile (); |
be147e84 | 5872 | |
f029db69 | 5873 | timevar_pop (TV_POST_EXPAND); |
be147e84 | 5874 | |
c2924966 | 5875 | return 0; |
242229bb JH |
5876 | } |
5877 | ||
27a4cd48 DM |
5878 | namespace { |
5879 | ||
5880 | const pass_data pass_data_expand = | |
242229bb | 5881 | { |
27a4cd48 DM |
5882 | RTL_PASS, /* type */ |
5883 | "expand", /* name */ | |
5884 | OPTGROUP_NONE, /* optinfo_flags */ | |
5885 | false, /* has_gate */ | |
5886 | true, /* has_execute */ | |
5887 | TV_EXPAND, /* tv_id */ | |
5888 | ( PROP_ssa | PROP_gimple_leh | PROP_cfg | |
6f37411d | 5889 | | PROP_gimple_lcx |
27a4cd48 DM |
5890 | | PROP_gimple_lvec ), /* properties_required */ |
5891 | PROP_rtl, /* properties_provided */ | |
5892 | ( PROP_ssa | PROP_trees ), /* properties_destroyed */ | |
5893 | ( TODO_verify_ssa | TODO_verify_flow | |
5894 | | TODO_verify_stmts ), /* todo_flags_start */ | |
5895 | 0, /* todo_flags_finish */ | |
242229bb | 5896 | }; |
27a4cd48 DM |
5897 | |
5898 | class pass_expand : public rtl_opt_pass | |
5899 | { | |
5900 | public: | |
c3284718 RS |
5901 | pass_expand (gcc::context *ctxt) |
5902 | : rtl_opt_pass (pass_data_expand, ctxt) | |
27a4cd48 DM |
5903 | {} |
5904 | ||
5905 | /* opt_pass methods: */ | |
5906 | unsigned int execute () { return gimple_expand_cfg (); } | |
5907 | ||
5908 | }; // class pass_expand | |
5909 | ||
5910 | } // anon namespace | |
5911 | ||
5912 | rtl_opt_pass * | |
5913 | make_pass_expand (gcc::context *ctxt) | |
5914 | { | |
5915 | return new pass_expand (ctxt); | |
5916 | } |