Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-dfa.c @ 141:ce508c72660f
copy cbc flang in cfgexpand
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
---|---|
date | Thu, 22 Nov 2018 19:44:39 +0900 |
parents | 84e7813d76e9 |
children | 1830386684a0 |
rev | line source |
---|---|
0 | 1 /* Data flow functions for trees. |
131 | 2 Copyright (C) 2001-2018 Free Software Foundation, Inc. |
0 | 3 Contributed by Diego Novillo <dnovillo@redhat.com> |
4 | |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify | |
8 it under the terms of the GNU General Public License as published by | |
9 the Free Software Foundation; either version 3, or (at your option) | |
10 any later version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, | |
13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 GNU General Public License for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 #include "config.h" | |
22 #include "system.h" | |
23 #include "coretypes.h" | |
111 | 24 #include "backend.h" |
25 #include "rtl.h" | |
0 | 26 #include "tree.h" |
111 | 27 #include "gimple.h" |
28 #include "tree-pass.h" | |
29 #include "ssa.h" | |
30 #include "tree-pretty-print.h" | |
31 #include "fold-const.h" | |
32 #include "stor-layout.h" | |
0 | 33 #include "langhooks.h" |
111 | 34 #include "gimple-iterator.h" |
35 #include "gimple-walk.h" | |
36 #include "tree-dfa.h" | |
0 | 37 |
38 /* Build and maintain data flow information for trees. */ | |
39 | |
40 /* Counters used to display DFA and SSA statistics. */ | |
41 struct dfa_stats_d | |
42 { | |
43 long num_defs; | |
44 long num_uses; | |
45 long num_phis; | |
46 long num_phi_args; | |
47 size_t max_num_phi_args; | |
48 long num_vdefs; | |
49 long num_vuses; | |
50 }; | |
51 | |
52 | |
53 /* Local functions. */ | |
54 static void collect_dfa_stats (struct dfa_stats_d *); | |
55 | |
56 | |
57 /*--------------------------------------------------------------------------- | |
58 Dataflow analysis (DFA) routines | |
59 ---------------------------------------------------------------------------*/ | |
60 | |
61 /* Renumber all of the gimple stmt uids. */ | |
62 | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
63 void |
0 | 64 renumber_gimple_stmt_uids (void) |
65 { | |
66 basic_block bb; | |
67 | |
68 set_gimple_stmt_max_uid (cfun, 0); | |
111 | 69 FOR_ALL_BB_FN (bb, cfun) |
0 | 70 { |
71 gimple_stmt_iterator bsi; | |
111 | 72 for (bsi = gsi_start_phis (bb); !gsi_end_p (bsi); gsi_next (&bsi)) |
73 { | |
74 gimple *stmt = gsi_stmt (bsi); | |
75 gimple_set_uid (stmt, inc_gimple_stmt_max_uid (cfun)); | |
76 } | |
0 | 77 for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi)) |
78 { | |
111 | 79 gimple *stmt = gsi_stmt (bsi); |
0 | 80 gimple_set_uid (stmt, inc_gimple_stmt_max_uid (cfun)); |
81 } | |
82 } | |
83 } | |
84 | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
85 /* Like renumber_gimple_stmt_uids, but only do work on the basic blocks |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
86 in BLOCKS, of which there are N_BLOCKS. Also renumbers PHIs. */ |
0 | 87 |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
88 void |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
89 renumber_gimple_stmt_uids_in_blocks (basic_block *blocks, int n_blocks) |
0 | 90 { |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
91 int i; |
0 | 92 |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
93 set_gimple_stmt_max_uid (cfun, 0); |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
94 for (i = 0; i < n_blocks; i++) |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
95 { |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
96 basic_block bb = blocks[i]; |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
97 gimple_stmt_iterator bsi; |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
98 for (bsi = gsi_start_phis (bb); !gsi_end_p (bsi); gsi_next (&bsi)) |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
99 { |
111 | 100 gimple *stmt = gsi_stmt (bsi); |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
101 gimple_set_uid (stmt, inc_gimple_stmt_max_uid (cfun)); |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
102 } |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
103 for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi)) |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
104 { |
111 | 105 gimple *stmt = gsi_stmt (bsi); |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
106 gimple_set_uid (stmt, inc_gimple_stmt_max_uid (cfun)); |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
107 } |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
108 } |
0 | 109 } |
110 | |
111 | |
112 | |
113 /*--------------------------------------------------------------------------- | |
114 Debugging functions | |
115 ---------------------------------------------------------------------------*/ | |
116 | |
117 /* Dump variable VAR and its may-aliases to FILE. */ | |
118 | |
119 void | |
120 dump_variable (FILE *file, tree var) | |
121 { | |
122 if (TREE_CODE (var) == SSA_NAME) | |
123 { | |
124 if (POINTER_TYPE_P (TREE_TYPE (var))) | |
125 dump_points_to_info_for (file, var); | |
126 var = SSA_NAME_VAR (var); | |
127 } | |
128 | |
129 if (var == NULL_TREE) | |
130 { | |
131 fprintf (file, "<nil>"); | |
132 return; | |
133 } | |
134 | |
135 print_generic_expr (file, var, dump_flags); | |
136 | |
137 fprintf (file, ", UID D.%u", (unsigned) DECL_UID (var)); | |
63
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
138 if (DECL_PT_UID (var) != DECL_UID (var)) |
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
139 fprintf (file, ", PT-UID D.%u", (unsigned) DECL_PT_UID (var)); |
0 | 140 |
141 fprintf (file, ", "); | |
142 print_generic_expr (file, TREE_TYPE (var), dump_flags); | |
143 | |
144 if (TREE_ADDRESSABLE (var)) | |
145 fprintf (file, ", is addressable"); | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
146 |
0 | 147 if (is_global_var (var)) |
148 fprintf (file, ", is global"); | |
149 | |
150 if (TREE_THIS_VOLATILE (var)) | |
151 fprintf (file, ", is volatile"); | |
152 | |
111 | 153 if (cfun && ssa_default_def (cfun, var)) |
0 | 154 { |
155 fprintf (file, ", default def: "); | |
111 | 156 print_generic_expr (file, ssa_default_def (cfun, var), dump_flags); |
0 | 157 } |
158 | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
159 if (DECL_INITIAL (var)) |
0 | 160 { |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
161 fprintf (file, ", initial: "); |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
162 print_generic_expr (file, DECL_INITIAL (var), dump_flags); |
0 | 163 } |
164 | |
165 fprintf (file, "\n"); | |
166 } | |
167 | |
168 | |
169 /* Dump variable VAR and its may-aliases to stderr. */ | |
170 | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
171 DEBUG_FUNCTION void |
0 | 172 debug_variable (tree var) |
173 { | |
174 dump_variable (stderr, var); | |
175 } | |
176 | |
177 | |
178 /* Dump various DFA statistics to FILE. */ | |
179 | |
180 void | |
181 dump_dfa_stats (FILE *file) | |
182 { | |
183 struct dfa_stats_d dfa_stats; | |
184 | |
185 unsigned long size, total = 0; | |
186 const char * const fmt_str = "%-30s%-13s%12s\n"; | |
187 const char * const fmt_str_1 = "%-30s%13lu%11lu%c\n"; | |
188 const char * const fmt_str_3 = "%-43s%11lu%c\n"; | |
189 const char *funcname | |
190 = lang_hooks.decl_printable_name (current_function_decl, 2); | |
191 | |
192 collect_dfa_stats (&dfa_stats); | |
193 | |
194 fprintf (file, "\nDFA Statistics for %s\n\n", funcname); | |
195 | |
196 fprintf (file, "---------------------------------------------------------\n"); | |
197 fprintf (file, fmt_str, "", " Number of ", "Memory"); | |
198 fprintf (file, fmt_str, "", " instances ", "used "); | |
199 fprintf (file, "---------------------------------------------------------\n"); | |
200 | |
201 size = dfa_stats.num_uses * sizeof (tree *); | |
202 total += size; | |
203 fprintf (file, fmt_str_1, "USE operands", dfa_stats.num_uses, | |
204 SCALE (size), LABEL (size)); | |
205 | |
206 size = dfa_stats.num_defs * sizeof (tree *); | |
207 total += size; | |
208 fprintf (file, fmt_str_1, "DEF operands", dfa_stats.num_defs, | |
209 SCALE (size), LABEL (size)); | |
210 | |
211 size = dfa_stats.num_vuses * sizeof (tree *); | |
212 total += size; | |
213 fprintf (file, fmt_str_1, "VUSE operands", dfa_stats.num_vuses, | |
214 SCALE (size), LABEL (size)); | |
215 | |
216 size = dfa_stats.num_vdefs * sizeof (tree *); | |
217 total += size; | |
218 fprintf (file, fmt_str_1, "VDEF operands", dfa_stats.num_vdefs, | |
219 SCALE (size), LABEL (size)); | |
220 | |
111 | 221 size = dfa_stats.num_phis * sizeof (struct gphi); |
0 | 222 total += size; |
223 fprintf (file, fmt_str_1, "PHI nodes", dfa_stats.num_phis, | |
224 SCALE (size), LABEL (size)); | |
225 | |
226 size = dfa_stats.num_phi_args * sizeof (struct phi_arg_d); | |
227 total += size; | |
228 fprintf (file, fmt_str_1, "PHI arguments", dfa_stats.num_phi_args, | |
229 SCALE (size), LABEL (size)); | |
230 | |
231 fprintf (file, "---------------------------------------------------------\n"); | |
232 fprintf (file, fmt_str_3, "Total memory used by DFA/SSA data", SCALE (total), | |
233 LABEL (total)); | |
234 fprintf (file, "---------------------------------------------------------\n"); | |
235 fprintf (file, "\n"); | |
236 | |
237 if (dfa_stats.num_phis) | |
238 fprintf (file, "Average number of arguments per PHI node: %.1f (max: %ld)\n", | |
239 (float) dfa_stats.num_phi_args / (float) dfa_stats.num_phis, | |
240 (long) dfa_stats.max_num_phi_args); | |
241 | |
242 fprintf (file, "\n"); | |
243 } | |
244 | |
245 | |
246 /* Dump DFA statistics on stderr. */ | |
247 | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
248 DEBUG_FUNCTION void |
0 | 249 debug_dfa_stats (void) |
250 { | |
251 dump_dfa_stats (stderr); | |
252 } | |
253 | |
254 | |
255 /* Collect DFA statistics and store them in the structure pointed to by | |
256 DFA_STATS_P. */ | |
257 | |
258 static void | |
259 collect_dfa_stats (struct dfa_stats_d *dfa_stats_p ATTRIBUTE_UNUSED) | |
260 { | |
261 basic_block bb; | |
262 | |
263 gcc_assert (dfa_stats_p); | |
264 | |
265 memset ((void *)dfa_stats_p, 0, sizeof (struct dfa_stats_d)); | |
266 | |
267 /* Walk all the statements in the function counting references. */ | |
111 | 268 FOR_EACH_BB_FN (bb, cfun) |
0 | 269 { |
111 | 270 for (gphi_iterator si = gsi_start_phis (bb); !gsi_end_p (si); |
271 gsi_next (&si)) | |
0 | 272 { |
111 | 273 gphi *phi = si.phi (); |
0 | 274 dfa_stats_p->num_phis++; |
275 dfa_stats_p->num_phi_args += gimple_phi_num_args (phi); | |
276 if (gimple_phi_num_args (phi) > dfa_stats_p->max_num_phi_args) | |
277 dfa_stats_p->max_num_phi_args = gimple_phi_num_args (phi); | |
278 } | |
279 | |
111 | 280 for (gimple_stmt_iterator si = gsi_start_bb (bb); !gsi_end_p (si); |
281 gsi_next (&si)) | |
0 | 282 { |
111 | 283 gimple *stmt = gsi_stmt (si); |
0 | 284 dfa_stats_p->num_defs += NUM_SSA_OPERANDS (stmt, SSA_OP_DEF); |
285 dfa_stats_p->num_uses += NUM_SSA_OPERANDS (stmt, SSA_OP_USE); | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
286 dfa_stats_p->num_vdefs += gimple_vdef (stmt) ? 1 : 0; |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
287 dfa_stats_p->num_vuses += gimple_vuse (stmt) ? 1 : 0; |
0 | 288 } |
289 } | |
290 } | |
291 | |
292 | |
293 /*--------------------------------------------------------------------------- | |
294 Miscellaneous helpers | |
295 ---------------------------------------------------------------------------*/ | |
296 | |
297 /* Lookup VAR UID in the default_defs hashtable and return the associated | |
298 variable. */ | |
299 | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
300 tree |
111 | 301 ssa_default_def (struct function *fn, tree var) |
0 | 302 { |
303 struct tree_decl_minimal ind; | |
304 struct tree_ssa_name in; | |
111 | 305 gcc_assert (VAR_P (var) |
306 || TREE_CODE (var) == PARM_DECL | |
307 || TREE_CODE (var) == RESULT_DECL); | |
308 | |
309 /* Always NULL_TREE for rtl function dumps. */ | |
310 if (!fn->gimple_df) | |
311 return NULL_TREE; | |
312 | |
0 | 313 in.var = (tree)&ind; |
314 ind.uid = DECL_UID (var); | |
111 | 315 return DEFAULT_DEFS (fn)->find_with_hash ((tree)&in, DECL_UID (var)); |
0 | 316 } |
317 | |
111 | 318 /* Insert the pair VAR's UID, DEF into the default_defs hashtable |
319 of function FN. */ | |
0 | 320 |
321 void | |
111 | 322 set_ssa_default_def (struct function *fn, tree var, tree def) |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
323 { |
0 | 324 struct tree_decl_minimal ind; |
325 struct tree_ssa_name in; | |
326 | |
111 | 327 gcc_assert (VAR_P (var) |
328 || TREE_CODE (var) == PARM_DECL | |
329 || TREE_CODE (var) == RESULT_DECL); | |
0 | 330 in.var = (tree)&ind; |
331 ind.uid = DECL_UID (var); | |
332 if (!def) | |
333 { | |
111 | 334 tree *loc = DEFAULT_DEFS (fn)->find_slot_with_hash ((tree)&in, |
335 DECL_UID (var), | |
336 NO_INSERT); | |
337 if (loc) | |
338 { | |
339 SSA_NAME_IS_DEFAULT_DEF (*(tree *)loc) = false; | |
340 DEFAULT_DEFS (fn)->clear_slot (loc); | |
341 } | |
0 | 342 return; |
343 } | |
344 gcc_assert (TREE_CODE (def) == SSA_NAME && SSA_NAME_VAR (def) == var); | |
111 | 345 tree *loc = DEFAULT_DEFS (fn)->find_slot_with_hash ((tree)&in, |
346 DECL_UID (var), INSERT); | |
0 | 347 |
348 /* Default definition might be changed by tail call optimization. */ | |
349 if (*loc) | |
111 | 350 SSA_NAME_IS_DEFAULT_DEF (*loc) = false; |
0 | 351 |
352 /* Mark DEF as the default definition for VAR. */ | |
111 | 353 *loc = def; |
354 SSA_NAME_IS_DEFAULT_DEF (def) = true; | |
0 | 355 } |
356 | |
111 | 357 /* Retrieve or create a default definition for VAR. */ |
0 | 358 |
359 tree | |
111 | 360 get_or_create_ssa_default_def (struct function *fn, tree var) |
0 | 361 { |
111 | 362 tree ddef = ssa_default_def (fn, var); |
363 if (ddef == NULL_TREE) | |
0 | 364 { |
111 | 365 ddef = make_ssa_name_fn (fn, var, gimple_build_nop ()); |
366 set_ssa_default_def (fn, var, ddef); | |
0 | 367 } |
111 | 368 return ddef; |
0 | 369 } |
370 | |
371 | |
372 /* If EXP is a handled component reference for a structure, return the | |
373 base variable. The access range is delimited by bit positions *POFFSET and | |
374 *POFFSET + *PMAX_SIZE. The access size is *PSIZE bits. If either | |
375 *PSIZE or *PMAX_SIZE is -1, they could not be determined. If *PSIZE | |
111 | 376 and *PMAX_SIZE are equal, the access is non-variable. If *PREVERSE is |
377 true, the storage order of the reference is reversed. */ | |
0 | 378 |
379 tree | |
131 | 380 get_ref_base_and_extent (tree exp, poly_int64_pod *poffset, |
381 poly_int64_pod *psize, | |
382 poly_int64_pod *pmax_size, | |
111 | 383 bool *preverse) |
0 | 384 { |
131 | 385 poly_offset_int bitsize = -1; |
386 poly_offset_int maxsize; | |
0 | 387 tree size_tree = NULL_TREE; |
131 | 388 poly_offset_int bit_offset = 0; |
0 | 389 bool seen_variable_array_ref = false; |
390 | |
111 | 391 /* First get the final access size and the storage order from just the |
392 outermost expression. */ | |
0 | 393 if (TREE_CODE (exp) == COMPONENT_REF) |
394 size_tree = DECL_SIZE (TREE_OPERAND (exp, 1)); | |
395 else if (TREE_CODE (exp) == BIT_FIELD_REF) | |
396 size_tree = TREE_OPERAND (exp, 1); | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
397 else if (!VOID_TYPE_P (TREE_TYPE (exp))) |
0 | 398 { |
111 | 399 machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); |
0 | 400 if (mode == BLKmode) |
401 size_tree = TYPE_SIZE (TREE_TYPE (exp)); | |
402 else | |
131 | 403 bitsize = GET_MODE_BITSIZE (mode); |
0 | 404 } |
111 | 405 if (size_tree != NULL_TREE |
131 | 406 && poly_int_tree_p (size_tree)) |
407 bitsize = wi::to_poly_offset (size_tree); | |
111 | 408 |
409 *preverse = reverse_storage_order_for_component_p (exp); | |
0 | 410 |
411 /* Initially, maxsize is the same as the accessed element size. | |
412 In the following it will only grow (or become -1). */ | |
413 maxsize = bitsize; | |
414 | |
415 /* Compute cumulative bit-offset for nested component-refs and array-refs, | |
416 and find the ultimate containing object. */ | |
417 while (1) | |
418 { | |
419 switch (TREE_CODE (exp)) | |
420 { | |
421 case BIT_FIELD_REF: | |
131 | 422 bit_offset += wi::to_poly_offset (TREE_OPERAND (exp, 2)); |
0 | 423 break; |
424 | |
425 case COMPONENT_REF: | |
426 { | |
427 tree field = TREE_OPERAND (exp, 1); | |
428 tree this_offset = component_ref_field_offset (exp); | |
429 | |
131 | 430 if (this_offset && poly_int_tree_p (this_offset)) |
0 | 431 { |
131 | 432 poly_offset_int woffset = (wi::to_poly_offset (this_offset) |
433 << LOG2_BITS_PER_UNIT); | |
111 | 434 woffset += wi::to_offset (DECL_FIELD_BIT_OFFSET (field)); |
435 bit_offset += woffset; | |
0 | 436 |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
437 /* If we had seen a variable array ref already and we just |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
438 referenced the last field of a struct or a union member |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
439 then we have to adjust maxsize by the padding at the end |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
440 of our field. */ |
131 | 441 if (seen_variable_array_ref) |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
442 { |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
443 tree stype = TREE_TYPE (TREE_OPERAND (exp, 0)); |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
444 tree next = DECL_CHAIN (field); |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
445 while (next && TREE_CODE (next) != FIELD_DECL) |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
446 next = DECL_CHAIN (next); |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
447 if (!next |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
448 || TREE_CODE (stype) != RECORD_TYPE) |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
449 { |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
450 tree fsize = DECL_SIZE_UNIT (field); |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
451 tree ssize = TYPE_SIZE_UNIT (stype); |
111 | 452 if (fsize == NULL |
131 | 453 || !poly_int_tree_p (fsize) |
111 | 454 || ssize == NULL |
131 | 455 || !poly_int_tree_p (ssize)) |
111 | 456 maxsize = -1; |
131 | 457 else if (known_size_p (maxsize)) |
111 | 458 { |
131 | 459 poly_offset_int tem |
460 = (wi::to_poly_offset (ssize) | |
461 - wi::to_poly_offset (fsize)); | |
111 | 462 tem <<= LOG2_BITS_PER_UNIT; |
463 tem -= woffset; | |
464 maxsize += tem; | |
465 } | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
466 } |
131 | 467 /* An component ref with an adjacent field up in the |
468 structure hierarchy constrains the size of any variable | |
469 array ref lower in the access hierarchy. */ | |
470 else | |
471 seen_variable_array_ref = false; | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
472 } |
0 | 473 } |
474 else | |
475 { | |
476 tree csize = TYPE_SIZE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
477 /* We need to adjust maxsize to the whole structure bitsize. | |
478 But we can subtract any constant offset seen so far, | |
479 because that would get us out of the structure otherwise. */ | |
131 | 480 if (known_size_p (maxsize) |
111 | 481 && csize |
131 | 482 && poly_int_tree_p (csize)) |
483 maxsize = wi::to_poly_offset (csize) - bit_offset; | |
0 | 484 else |
485 maxsize = -1; | |
486 } | |
487 } | |
488 break; | |
489 | |
490 case ARRAY_REF: | |
491 case ARRAY_RANGE_REF: | |
492 { | |
493 tree index = TREE_OPERAND (exp, 1); | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
494 tree low_bound, unit_size; |
0 | 495 |
496 /* If the resulting bit-offset is constant, track it. */ | |
131 | 497 if (poly_int_tree_p (index) |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
498 && (low_bound = array_ref_low_bound (exp), |
131 | 499 poly_int_tree_p (low_bound)) |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
500 && (unit_size = array_ref_element_size (exp), |
111 | 501 TREE_CODE (unit_size) == INTEGER_CST)) |
0 | 502 { |
131 | 503 poly_offset_int woffset |
504 = wi::sext (wi::to_poly_offset (index) | |
505 - wi::to_poly_offset (low_bound), | |
111 | 506 TYPE_PRECISION (TREE_TYPE (index))); |
507 woffset *= wi::to_offset (unit_size); | |
508 woffset <<= LOG2_BITS_PER_UNIT; | |
509 bit_offset += woffset; | |
0 | 510 |
511 /* An array ref with a constant index up in the structure | |
512 hierarchy will constrain the size of any variable array ref | |
513 lower in the access hierarchy. */ | |
514 seen_variable_array_ref = false; | |
515 } | |
516 else | |
517 { | |
518 tree asize = TYPE_SIZE (TREE_TYPE (TREE_OPERAND (exp, 0))); | |
519 /* We need to adjust maxsize to the whole array bitsize. | |
520 But we can subtract any constant offset seen so far, | |
521 because that would get us outside of the array otherwise. */ | |
131 | 522 if (known_size_p (maxsize) |
111 | 523 && asize |
131 | 524 && poly_int_tree_p (asize)) |
525 maxsize = wi::to_poly_offset (asize) - bit_offset; | |
0 | 526 else |
527 maxsize = -1; | |
528 | |
529 /* Remember that we have seen an array ref with a variable | |
530 index. */ | |
531 seen_variable_array_ref = true; | |
131 | 532 |
533 wide_int min, max; | |
534 if (TREE_CODE (index) == SSA_NAME | |
535 && (low_bound = array_ref_low_bound (exp), | |
536 poly_int_tree_p (low_bound)) | |
537 && (unit_size = array_ref_element_size (exp), | |
538 TREE_CODE (unit_size) == INTEGER_CST) | |
539 && get_range_info (index, &min, &max) == VR_RANGE) | |
540 { | |
541 poly_offset_int lbound = wi::to_poly_offset (low_bound); | |
542 /* Try to constrain maxsize with range information. */ | |
543 offset_int omax | |
544 = offset_int::from (max, TYPE_SIGN (TREE_TYPE (index))); | |
545 if (known_lt (lbound, omax)) | |
546 { | |
547 poly_offset_int rmaxsize; | |
548 rmaxsize = (omax - lbound + 1) | |
549 * wi::to_offset (unit_size) << LOG2_BITS_PER_UNIT; | |
550 if (!known_size_p (maxsize) | |
551 || known_lt (rmaxsize, maxsize)) | |
552 { | |
553 /* If we know an upper bound below the declared | |
554 one this is no longer variable. */ | |
555 if (known_size_p (maxsize)) | |
556 seen_variable_array_ref = false; | |
557 maxsize = rmaxsize; | |
558 } | |
559 } | |
560 /* Try to adjust bit_offset with range information. */ | |
561 offset_int omin | |
562 = offset_int::from (min, TYPE_SIGN (TREE_TYPE (index))); | |
563 if (known_le (lbound, omin)) | |
564 { | |
565 poly_offset_int woffset | |
566 = wi::sext (omin - lbound, | |
567 TYPE_PRECISION (TREE_TYPE (index))); | |
568 woffset *= wi::to_offset (unit_size); | |
569 woffset <<= LOG2_BITS_PER_UNIT; | |
570 bit_offset += woffset; | |
571 if (known_size_p (maxsize)) | |
572 maxsize -= woffset; | |
573 } | |
574 } | |
0 | 575 } |
576 } | |
577 break; | |
578 | |
579 case REALPART_EXPR: | |
580 break; | |
581 | |
582 case IMAGPART_EXPR: | |
583 bit_offset += bitsize; | |
584 break; | |
585 | |
586 case VIEW_CONVERT_EXPR: | |
587 break; | |
588 | |
111 | 589 case TARGET_MEM_REF: |
590 /* Via the variable index or index2 we can reach the | |
591 whole object. Still hand back the decl here. */ | |
592 if (TREE_CODE (TMR_BASE (exp)) == ADDR_EXPR | |
593 && (TMR_INDEX (exp) || TMR_INDEX2 (exp))) | |
594 { | |
595 exp = TREE_OPERAND (TMR_BASE (exp), 0); | |
596 bit_offset = 0; | |
597 maxsize = -1; | |
598 goto done; | |
599 } | |
600 /* Fallthru. */ | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
601 case MEM_REF: |
111 | 602 /* We need to deal with variable arrays ending structures such as |
603 struct { int length; int a[1]; } x; x.a[d] | |
604 struct { struct { int a; int b; } a[1]; } x; x.a[d].a | |
605 struct { struct { int a[1]; } a[1]; } x; x.a[0][d], x.a[d][0] | |
606 struct { int len; union { int a[1]; struct X x; } u; } x; x.u.a[d] | |
607 where we do not know maxsize for variable index accesses to | |
608 the array. The simplest way to conservatively deal with this | |
609 is to punt in the case that offset + maxsize reaches the | |
610 base type boundary. This needs to include possible trailing | |
611 padding that is there for alignment purposes. */ | |
612 if (seen_variable_array_ref | |
131 | 613 && known_size_p (maxsize) |
111 | 614 && (TYPE_SIZE (TREE_TYPE (exp)) == NULL_TREE |
131 | 615 || !poly_int_tree_p (TYPE_SIZE (TREE_TYPE (exp))) |
616 || (maybe_eq | |
617 (bit_offset + maxsize, | |
618 wi::to_poly_offset (TYPE_SIZE (TREE_TYPE (exp))))))) | |
111 | 619 maxsize = -1; |
620 | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
621 /* Hand back the decl for MEM[&decl, off]. */ |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
622 if (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
623 { |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
624 if (integer_zerop (TREE_OPERAND (exp, 1))) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
625 exp = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
626 else |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
627 { |
131 | 628 poly_offset_int off = mem_ref_offset (exp); |
111 | 629 off <<= LOG2_BITS_PER_UNIT; |
630 off += bit_offset; | |
131 | 631 poly_int64 off_hwi; |
632 if (off.to_shwi (&off_hwi)) | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
633 { |
131 | 634 bit_offset = off_hwi; |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
635 exp = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
636 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
637 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
638 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
639 goto done; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
640 |
0 | 641 default: |
642 goto done; | |
643 } | |
644 | |
645 exp = TREE_OPERAND (exp, 0); | |
646 } | |
111 | 647 |
0 | 648 done: |
131 | 649 if (!bitsize.to_shwi (psize) || maybe_lt (*psize, 0)) |
111 | 650 { |
651 *poffset = 0; | |
652 *psize = -1; | |
653 *pmax_size = -1; | |
654 | |
655 return exp; | |
656 } | |
0 | 657 |
131 | 658 /* ??? Due to negative offsets in ARRAY_REF we can end up with |
659 negative bit_offset here. We might want to store a zero offset | |
660 in this case. */ | |
661 if (!bit_offset.to_shwi (poffset)) | |
111 | 662 { |
663 *poffset = 0; | |
664 *pmax_size = -1; | |
665 | |
666 return exp; | |
667 } | |
668 | |
669 /* In case of a decl or constant base object we can do better. */ | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
670 |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
671 if (DECL_P (exp)) |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
672 { |
131 | 673 if (VAR_P (exp) |
674 && ((flag_unconstrained_commons && DECL_COMMON (exp)) | |
675 || (DECL_EXTERNAL (exp) && seen_variable_array_ref))) | |
111 | 676 { |
677 tree sz_tree = TYPE_SIZE (TREE_TYPE (exp)); | |
678 /* If size is unknown, or we have read to the end, assume there | |
679 may be more to the structure than we are told. */ | |
680 if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
681 || (seen_variable_array_ref | |
682 && (sz_tree == NULL_TREE | |
131 | 683 || !poly_int_tree_p (sz_tree) |
684 || maybe_eq (bit_offset + maxsize, | |
685 wi::to_poly_offset (sz_tree))))) | |
111 | 686 maxsize = -1; |
687 } | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
688 /* If maxsize is unknown adjust it according to the size of the |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
689 base decl. */ |
131 | 690 else if (!known_size_p (maxsize) |
691 && DECL_SIZE (exp) | |
692 && poly_int_tree_p (DECL_SIZE (exp))) | |
693 maxsize = wi::to_poly_offset (DECL_SIZE (exp)) - bit_offset; | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
694 } |
111 | 695 else if (CONSTANT_CLASS_P (exp)) |
696 { | |
697 /* If maxsize is unknown adjust it according to the size of the | |
698 base type constant. */ | |
131 | 699 if (!known_size_p (maxsize) |
111 | 700 && TYPE_SIZE (TREE_TYPE (exp)) |
131 | 701 && poly_int_tree_p (TYPE_SIZE (TREE_TYPE (exp)))) |
702 maxsize = (wi::to_poly_offset (TYPE_SIZE (TREE_TYPE (exp))) | |
111 | 703 - bit_offset); |
704 } | |
0 | 705 |
131 | 706 if (!maxsize.to_shwi (pmax_size) |
707 || maybe_lt (*pmax_size, 0) | |
708 || !endpoint_representable_p (*poffset, *pmax_size)) | |
111 | 709 *pmax_size = -1; |
710 | |
711 /* Punt if *POFFSET + *PSIZE overflows in HOST_WIDE_INT, the callers don't | |
712 check for such overflows individually and assume it works. */ | |
131 | 713 if (!endpoint_representable_p (*poffset, *psize)) |
111 | 714 { |
715 *poffset = 0; | |
716 *psize = -1; | |
717 *pmax_size = -1; | |
718 | |
719 return exp; | |
720 } | |
0 | 721 |
722 return exp; | |
723 } | |
724 | |
131 | 725 /* Like get_ref_base_and_extent, but for cases in which we only care |
726 about constant-width accesses at constant offsets. Return null | |
727 if the access is anything else. */ | |
728 | |
729 tree | |
730 get_ref_base_and_extent_hwi (tree exp, HOST_WIDE_INT *poffset, | |
731 HOST_WIDE_INT *psize, bool *preverse) | |
732 { | |
733 poly_int64 offset, size, max_size; | |
734 HOST_WIDE_INT const_offset, const_size; | |
735 bool reverse; | |
736 tree decl = get_ref_base_and_extent (exp, &offset, &size, &max_size, | |
737 &reverse); | |
738 if (!offset.is_constant (&const_offset) | |
739 || !size.is_constant (&const_size) | |
740 || const_offset < 0 | |
741 || !known_size_p (max_size) | |
742 || maybe_ne (max_size, const_size)) | |
743 return NULL_TREE; | |
744 | |
745 *poffset = const_offset; | |
746 *psize = const_size; | |
747 *preverse = reverse; | |
748 return decl; | |
749 } | |
750 | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
751 /* Returns the base object and a constant BITS_PER_UNIT offset in *POFFSET that |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
752 denotes the starting address of the memory access EXP. |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
753 Returns NULL_TREE if the offset is not constant or any component |
111 | 754 is not BITS_PER_UNIT-aligned. |
755 VALUEIZE if non-NULL is used to valueize SSA names. It should return | |
756 its argument or a constant if the argument is known to be constant. */ | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
757 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
758 tree |
131 | 759 get_addr_base_and_unit_offset_1 (tree exp, poly_int64_pod *poffset, |
111 | 760 tree (*valueize) (tree)) |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
761 { |
131 | 762 poly_int64 byte_offset = 0; |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
763 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
764 /* Compute cumulative byte-offset for nested component-refs and array-refs, |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
765 and find the ultimate containing object. */ |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
766 while (1) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
767 { |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
768 switch (TREE_CODE (exp)) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
769 { |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
770 case BIT_FIELD_REF: |
111 | 771 { |
131 | 772 poly_int64 this_byte_offset; |
773 poly_uint64 this_bit_offset; | |
774 if (!poly_int_tree_p (TREE_OPERAND (exp, 2), &this_bit_offset) | |
775 || !multiple_p (this_bit_offset, BITS_PER_UNIT, | |
776 &this_byte_offset)) | |
111 | 777 return NULL_TREE; |
131 | 778 byte_offset += this_byte_offset; |
111 | 779 } |
780 break; | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
781 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
782 case COMPONENT_REF: |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
783 { |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
784 tree field = TREE_OPERAND (exp, 1); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
785 tree this_offset = component_ref_field_offset (exp); |
131 | 786 poly_int64 hthis_offset; |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
787 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
788 if (!this_offset |
131 | 789 || !poly_int_tree_p (this_offset, &hthis_offset) |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
790 || (TREE_INT_CST_LOW (DECL_FIELD_BIT_OFFSET (field)) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
791 % BITS_PER_UNIT)) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
792 return NULL_TREE; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
793 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
794 hthis_offset += (TREE_INT_CST_LOW (DECL_FIELD_BIT_OFFSET (field)) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
795 / BITS_PER_UNIT); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
796 byte_offset += hthis_offset; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
797 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
798 break; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
799 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
800 case ARRAY_REF: |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
801 case ARRAY_RANGE_REF: |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
802 { |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
803 tree index = TREE_OPERAND (exp, 1); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
804 tree low_bound, unit_size; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
805 |
111 | 806 if (valueize |
807 && TREE_CODE (index) == SSA_NAME) | |
808 index = (*valueize) (index); | |
809 | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
810 /* If the resulting bit-offset is constant, track it. */ |
131 | 811 if (poly_int_tree_p (index) |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
812 && (low_bound = array_ref_low_bound (exp), |
131 | 813 poly_int_tree_p (low_bound)) |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
814 && (unit_size = array_ref_element_size (exp), |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
815 TREE_CODE (unit_size) == INTEGER_CST)) |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
816 { |
131 | 817 poly_offset_int woffset |
818 = wi::sext (wi::to_poly_offset (index) | |
819 - wi::to_poly_offset (low_bound), | |
111 | 820 TYPE_PRECISION (TREE_TYPE (index))); |
821 woffset *= wi::to_offset (unit_size); | |
131 | 822 byte_offset += woffset.force_shwi (); |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
823 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
824 else |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
825 return NULL_TREE; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
826 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
827 break; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
828 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
829 case REALPART_EXPR: |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
830 break; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
831 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
832 case IMAGPART_EXPR: |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
833 byte_offset += TREE_INT_CST_LOW (TYPE_SIZE_UNIT (TREE_TYPE (exp))); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
834 break; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
835 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
836 case VIEW_CONVERT_EXPR: |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
837 break; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
838 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
839 case MEM_REF: |
111 | 840 { |
841 tree base = TREE_OPERAND (exp, 0); | |
842 if (valueize | |
843 && TREE_CODE (base) == SSA_NAME) | |
844 base = (*valueize) (base); | |
845 | |
846 /* Hand back the decl for MEM[&decl, off]. */ | |
847 if (TREE_CODE (base) == ADDR_EXPR) | |
848 { | |
849 if (!integer_zerop (TREE_OPERAND (exp, 1))) | |
850 { | |
131 | 851 poly_offset_int off = mem_ref_offset (exp); |
852 byte_offset += off.force_shwi (); | |
111 | 853 } |
854 exp = TREE_OPERAND (base, 0); | |
855 } | |
856 goto done; | |
857 } | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
858 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
859 case TARGET_MEM_REF: |
111 | 860 { |
861 tree base = TREE_OPERAND (exp, 0); | |
862 if (valueize | |
863 && TREE_CODE (base) == SSA_NAME) | |
864 base = (*valueize) (base); | |
865 | |
866 /* Hand back the decl for MEM[&decl, off]. */ | |
867 if (TREE_CODE (base) == ADDR_EXPR) | |
868 { | |
869 if (TMR_INDEX (exp) || TMR_INDEX2 (exp)) | |
870 return NULL_TREE; | |
871 if (!integer_zerop (TMR_OFFSET (exp))) | |
872 { | |
131 | 873 poly_offset_int off = mem_ref_offset (exp); |
874 byte_offset += off.force_shwi (); | |
111 | 875 } |
876 exp = TREE_OPERAND (base, 0); | |
877 } | |
878 goto done; | |
879 } | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
880 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
881 default: |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
882 goto done; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
883 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
884 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
885 exp = TREE_OPERAND (exp, 0); |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
886 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
887 done: |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
888 |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
889 *poffset = byte_offset; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
890 return exp; |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
891 } |
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
892 |
111 | 893 /* Returns the base object and a constant BITS_PER_UNIT offset in *POFFSET that |
894 denotes the starting address of the memory access EXP. | |
895 Returns NULL_TREE if the offset is not constant or any component | |
896 is not BITS_PER_UNIT-aligned. */ | |
897 | |
898 tree | |
131 | 899 get_addr_base_and_unit_offset (tree exp, poly_int64_pod *poffset) |
111 | 900 { |
901 return get_addr_base_and_unit_offset_1 (exp, poffset, NULL); | |
902 } | |
903 | |
0 | 904 /* Returns true if STMT references an SSA_NAME that has |
905 SSA_NAME_OCCURS_IN_ABNORMAL_PHI set, otherwise false. */ | |
906 | |
907 bool | |
111 | 908 stmt_references_abnormal_ssa_name (gimple *stmt) |
0 | 909 { |
910 ssa_op_iter oi; | |
911 use_operand_p use_p; | |
912 | |
913 FOR_EACH_SSA_USE_OPERAND (use_p, stmt, oi, SSA_OP_USE) | |
914 { | |
915 if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (USE_FROM_PTR (use_p))) | |
916 return true; | |
917 } | |
918 | |
919 return false; | |
920 } | |
921 | |
111 | 922 /* If STMT takes any abnormal PHI values as input, replace them with |
923 local copies. */ | |
924 | |
925 void | |
926 replace_abnormal_ssa_names (gimple *stmt) | |
927 { | |
928 ssa_op_iter oi; | |
929 use_operand_p use_p; | |
930 | |
931 FOR_EACH_SSA_USE_OPERAND (use_p, stmt, oi, SSA_OP_USE) | |
932 { | |
933 tree op = USE_FROM_PTR (use_p); | |
934 if (TREE_CODE (op) == SSA_NAME && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (op)) | |
935 { | |
936 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); | |
937 tree new_name = make_ssa_name (TREE_TYPE (op)); | |
938 gassign *assign = gimple_build_assign (new_name, op); | |
939 gsi_insert_before (&gsi, assign, GSI_SAME_STMT); | |
940 SET_USE (use_p, new_name); | |
941 } | |
942 } | |
943 } | |
944 | |
945 /* Pair of tree and a sorting index, for dump_enumerated_decls. */ | |
946 struct GTY(()) numbered_tree | |
947 { | |
948 tree t; | |
949 int num; | |
950 }; | |
951 | |
952 | |
953 /* Compare two declarations references by their DECL_UID / sequence number. | |
954 Called via qsort. */ | |
955 | |
956 static int | |
957 compare_decls_by_uid (const void *pa, const void *pb) | |
958 { | |
959 const numbered_tree *nt_a = ((const numbered_tree *)pa); | |
960 const numbered_tree *nt_b = ((const numbered_tree *)pb); | |
961 | |
962 if (DECL_UID (nt_a->t) != DECL_UID (nt_b->t)) | |
963 return DECL_UID (nt_a->t) - DECL_UID (nt_b->t); | |
964 return nt_a->num - nt_b->num; | |
965 } | |
966 | |
967 /* Called via walk_gimple_stmt / walk_gimple_op by dump_enumerated_decls. */ | |
968 static tree | |
969 dump_enumerated_decls_push (tree *tp, int *walk_subtrees, void *data) | |
970 { | |
971 struct walk_stmt_info *wi = (struct walk_stmt_info *) data; | |
972 vec<numbered_tree> *list = (vec<numbered_tree> *) wi->info; | |
973 numbered_tree nt; | |
974 | |
975 if (!DECL_P (*tp)) | |
976 return NULL_TREE; | |
977 nt.t = *tp; | |
978 nt.num = list->length (); | |
979 list->safe_push (nt); | |
980 *walk_subtrees = 0; | |
981 return NULL_TREE; | |
982 } | |
983 | |
984 /* Find all the declarations used by the current function, sort them by uid, | |
985 and emit the sorted list. Each declaration is tagged with a sequence | |
986 number indicating when it was found during statement / tree walking, | |
987 so that TDF_NOUID comparisons of anonymous declarations are still | |
988 meaningful. Where a declaration was encountered more than once, we | |
989 emit only the sequence number of the first encounter. | |
990 FILE is the dump file where to output the list and FLAGS is as in | |
991 print_generic_expr. */ | |
992 void | |
993 dump_enumerated_decls (FILE *file, dump_flags_t flags) | |
994 { | |
131 | 995 if (!cfun->cfg) |
996 return; | |
997 | |
111 | 998 basic_block bb; |
999 struct walk_stmt_info wi; | |
1000 auto_vec<numbered_tree, 40> decl_list; | |
1001 | |
1002 memset (&wi, '\0', sizeof (wi)); | |
1003 wi.info = (void *) &decl_list; | |
1004 FOR_EACH_BB_FN (bb, cfun) | |
1005 { | |
1006 gimple_stmt_iterator gsi; | |
1007 | |
1008 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
1009 if (!is_gimple_debug (gsi_stmt (gsi))) | |
1010 walk_gimple_stmt (&gsi, NULL, dump_enumerated_decls_push, &wi); | |
1011 } | |
1012 decl_list.qsort (compare_decls_by_uid); | |
1013 if (decl_list.length ()) | |
1014 { | |
1015 unsigned ix; | |
1016 numbered_tree *ntp; | |
1017 tree last = NULL_TREE; | |
1018 | |
1019 fprintf (file, "Declarations used by %s, sorted by DECL_UID:\n", | |
1020 current_function_name ()); | |
1021 FOR_EACH_VEC_ELT (decl_list, ix, ntp) | |
1022 { | |
1023 if (ntp->t == last) | |
1024 continue; | |
1025 fprintf (file, "%d: ", ntp->num); | |
1026 print_generic_decl (file, ntp->t, flags); | |
1027 fprintf (file, "\n"); | |
1028 last = ntp->t; | |
1029 } | |
1030 } | |
1031 } |