Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-nested.c @ 60:bd49c42ec43e
remove unnecessary files
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 15 Feb 2010 17:39:45 +0900 |
| parents | 77e2b8dfacca |
| children | b7f97abdc517 |
| rev | line source |
|---|---|
| 0 | 1 /* Nested function decomposition for GIMPLE. |
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2 Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 |
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3 Free Software Foundation, Inc. |
| 0 | 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" | |
| 24 #include "tm.h" | |
| 25 #include "tree.h" | |
| 26 #include "rtl.h" | |
| 27 #include "tm_p.h" | |
| 28 #include "function.h" | |
| 29 #include "tree-dump.h" | |
| 30 #include "tree-inline.h" | |
| 31 #include "gimple.h" | |
| 32 #include "tree-iterator.h" | |
| 33 #include "tree-flow.h" | |
| 34 #include "cgraph.h" | |
| 35 #include "expr.h" | |
| 36 #include "langhooks.h" | |
| 37 #include "pointer-set.h" | |
| 38 #include "ggc.h" | |
| 39 | |
| 40 | |
| 41 /* The object of this pass is to lower the representation of a set of nested | |
| 42 functions in order to expose all of the gory details of the various | |
| 43 nonlocal references. We want to do this sooner rather than later, in | |
| 44 order to give us more freedom in emitting all of the functions in question. | |
| 45 | |
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46 Back in olden times, when gcc was young, we developed an insanely |
| 0 | 47 complicated scheme whereby variables which were referenced nonlocally |
| 48 were forced to live in the stack of the declaring function, and then | |
| 49 the nested functions magically discovered where these variables were | |
| 50 placed. In order for this scheme to function properly, it required | |
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51 that the outer function be partially expanded, then we switch to |
| 0 | 52 compiling the inner function, and once done with those we switch back |
| 53 to compiling the outer function. Such delicate ordering requirements | |
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54 makes it difficult to do whole translation unit optimizations |
| 0 | 55 involving such functions. |
| 56 | |
| 57 The implementation here is much more direct. Everything that can be | |
| 58 referenced by an inner function is a member of an explicitly created | |
| 59 structure herein called the "nonlocal frame struct". The incoming | |
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60 static chain for a nested function is a pointer to this struct in |
| 0 | 61 the parent. In this way, we settle on known offsets from a known |
| 62 base, and so are decoupled from the logic that places objects in the | |
| 63 function's stack frame. More importantly, we don't have to wait for | |
| 64 that to happen -- since the compilation of the inner function is no | |
| 65 longer tied to a real stack frame, the nonlocal frame struct can be | |
| 66 allocated anywhere. Which means that the outer function is now | |
| 67 inlinable. | |
| 68 | |
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69 Theory of operation here is very simple. Iterate over all the |
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70 statements in all the functions (depth first) several times, |
| 0 | 71 allocating structures and fields on demand. In general we want to |
| 72 examine inner functions first, so that we can avoid making changes | |
| 73 to outer functions which are unnecessary. | |
| 74 | |
| 75 The order of the passes matters a bit, in that later passes will be | |
| 76 skipped if it is discovered that the functions don't actually interact | |
| 77 at all. That is, they're nested in the lexical sense but could have | |
| 78 been written as independent functions without change. */ | |
| 79 | |
| 80 | |
| 81 struct nesting_info | |
| 82 { | |
| 83 struct nesting_info *outer; | |
| 84 struct nesting_info *inner; | |
| 85 struct nesting_info *next; | |
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86 |
| 0 | 87 struct pointer_map_t *field_map; |
| 88 struct pointer_map_t *var_map; | |
| 89 bitmap suppress_expansion; | |
| 90 | |
| 91 tree context; | |
| 92 tree new_local_var_chain; | |
| 93 tree debug_var_chain; | |
| 94 tree frame_type; | |
| 95 tree frame_decl; | |
| 96 tree chain_field; | |
| 97 tree chain_decl; | |
| 98 tree nl_goto_field; | |
| 99 | |
| 100 bool any_parm_remapped; | |
| 101 bool any_tramp_created; | |
| 102 char static_chain_added; | |
| 103 }; | |
| 104 | |
| 105 | |
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106 /* Iterate over the nesting tree, starting with ROOT, depth first. */ |
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107 |
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108 static inline struct nesting_info * |
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109 iter_nestinfo_start (struct nesting_info *root) |
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110 { |
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111 while (root->inner) |
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112 root = root->inner; |
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113 return root; |
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114 } |
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115 |
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116 static inline struct nesting_info * |
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117 iter_nestinfo_next (struct nesting_info *node) |
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118 { |
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119 if (node->next) |
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120 return iter_nestinfo_start (node->next); |
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121 return node->outer; |
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122 } |
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123 |
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124 #define FOR_EACH_NEST_INFO(I, ROOT) \ |
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125 for ((I) = iter_nestinfo_start (ROOT); (I); (I) = iter_nestinfo_next (I)) |
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126 |
| 0 | 127 /* Obstack used for the bitmaps in the struct above. */ |
| 128 static struct bitmap_obstack nesting_info_bitmap_obstack; | |
| 129 | |
| 130 | |
| 131 /* We're working in so many different function contexts simultaneously, | |
| 132 that create_tmp_var is dangerous. Prevent mishap. */ | |
| 133 #define create_tmp_var cant_use_create_tmp_var_here_dummy | |
| 134 | |
| 135 /* Like create_tmp_var, except record the variable for registration at | |
| 136 the given nesting level. */ | |
| 137 | |
| 138 static tree | |
| 139 create_tmp_var_for (struct nesting_info *info, tree type, const char *prefix) | |
| 140 { | |
| 141 tree tmp_var; | |
| 142 | |
| 143 /* If the type is of variable size or a type which must be created by the | |
| 144 frontend, something is wrong. Note that we explicitly allow | |
| 145 incomplete types here, since we create them ourselves here. */ | |
| 146 gcc_assert (!TREE_ADDRESSABLE (type)); | |
| 147 gcc_assert (!TYPE_SIZE_UNIT (type) | |
| 148 || TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST); | |
| 149 | |
| 150 tmp_var = create_tmp_var_raw (type, prefix); | |
| 151 DECL_CONTEXT (tmp_var) = info->context; | |
| 152 TREE_CHAIN (tmp_var) = info->new_local_var_chain; | |
| 153 DECL_SEEN_IN_BIND_EXPR_P (tmp_var) = 1; | |
| 154 if (TREE_CODE (type) == COMPLEX_TYPE | |
| 155 || TREE_CODE (type) == VECTOR_TYPE) | |
| 156 DECL_GIMPLE_REG_P (tmp_var) = 1; | |
| 157 | |
| 158 info->new_local_var_chain = tmp_var; | |
| 159 | |
| 160 return tmp_var; | |
| 161 } | |
| 162 | |
| 163 /* Take the address of EXP to be used within function CONTEXT. | |
| 164 Mark it for addressability as necessary. */ | |
| 165 | |
| 166 tree | |
| 167 build_addr (tree exp, tree context) | |
| 168 { | |
| 169 tree base = exp; | |
| 170 tree save_context; | |
| 171 tree retval; | |
| 172 | |
| 173 while (handled_component_p (base)) | |
| 174 base = TREE_OPERAND (base, 0); | |
| 175 | |
| 176 if (DECL_P (base)) | |
| 177 TREE_ADDRESSABLE (base) = 1; | |
| 178 | |
| 179 /* Building the ADDR_EXPR will compute a set of properties for | |
| 180 that ADDR_EXPR. Those properties are unfortunately context | |
| 181 specific, i.e., they are dependent on CURRENT_FUNCTION_DECL. | |
| 182 | |
| 183 Temporarily set CURRENT_FUNCTION_DECL to the desired context, | |
| 184 build the ADDR_EXPR, then restore CURRENT_FUNCTION_DECL. That | |
| 185 way the properties are for the ADDR_EXPR are computed properly. */ | |
| 186 save_context = current_function_decl; | |
| 187 current_function_decl = context; | |
| 188 retval = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (exp)), exp); | |
| 189 current_function_decl = save_context; | |
| 190 return retval; | |
| 191 } | |
| 192 | |
| 193 /* Insert FIELD into TYPE, sorted by alignment requirements. */ | |
| 194 | |
| 195 void | |
| 196 insert_field_into_struct (tree type, tree field) | |
| 197 { | |
| 198 tree *p; | |
| 199 | |
| 200 DECL_CONTEXT (field) = type; | |
| 201 | |
| 202 for (p = &TYPE_FIELDS (type); *p ; p = &TREE_CHAIN (*p)) | |
| 203 if (DECL_ALIGN (field) >= DECL_ALIGN (*p)) | |
| 204 break; | |
| 205 | |
| 206 TREE_CHAIN (field) = *p; | |
| 207 *p = field; | |
| 208 | |
| 209 /* Set correct alignment for frame struct type. */ | |
| 210 if (TYPE_ALIGN (type) < DECL_ALIGN (field)) | |
| 211 TYPE_ALIGN (type) = DECL_ALIGN (field); | |
| 212 } | |
| 213 | |
| 214 /* Build or return the RECORD_TYPE that describes the frame state that is | |
| 215 shared between INFO->CONTEXT and its nested functions. This record will | |
| 216 not be complete until finalize_nesting_tree; up until that point we'll | |
| 217 be adding fields as necessary. | |
| 218 | |
| 219 We also build the DECL that represents this frame in the function. */ | |
| 220 | |
| 221 static tree | |
| 222 get_frame_type (struct nesting_info *info) | |
| 223 { | |
| 224 tree type = info->frame_type; | |
| 225 if (!type) | |
| 226 { | |
| 227 char *name; | |
| 228 | |
| 229 type = make_node (RECORD_TYPE); | |
| 230 | |
| 231 name = concat ("FRAME.", | |
| 232 IDENTIFIER_POINTER (DECL_NAME (info->context)), | |
| 233 NULL); | |
| 234 TYPE_NAME (type) = get_identifier (name); | |
| 235 free (name); | |
| 236 | |
| 237 info->frame_type = type; | |
| 238 info->frame_decl = create_tmp_var_for (info, type, "FRAME"); | |
| 239 | |
| 240 /* ??? Always make it addressable for now, since it is meant to | |
| 241 be pointed to by the static chain pointer. This pessimizes | |
| 242 when it turns out that no static chains are needed because | |
| 243 the nested functions referencing non-local variables are not | |
| 244 reachable, but the true pessimization is to create the non- | |
| 245 local frame structure in the first place. */ | |
| 246 TREE_ADDRESSABLE (info->frame_decl) = 1; | |
| 247 } | |
| 248 return type; | |
| 249 } | |
| 250 | |
| 251 /* Return true if DECL should be referenced by pointer in the non-local | |
| 252 frame structure. */ | |
| 253 | |
| 254 static bool | |
| 255 use_pointer_in_frame (tree decl) | |
| 256 { | |
| 257 if (TREE_CODE (decl) == PARM_DECL) | |
| 258 { | |
| 259 /* It's illegal to copy TREE_ADDRESSABLE, impossible to copy variable | |
| 260 sized decls, and inefficient to copy large aggregates. Don't bother | |
| 261 moving anything but scalar variables. */ | |
| 262 return AGGREGATE_TYPE_P (TREE_TYPE (decl)); | |
| 263 } | |
| 264 else | |
| 265 { | |
| 266 /* Variable sized types make things "interesting" in the frame. */ | |
| 267 return DECL_SIZE (decl) == NULL || !TREE_CONSTANT (DECL_SIZE (decl)); | |
| 268 } | |
| 269 } | |
| 270 | |
| 271 /* Given DECL, a non-locally accessed variable, find or create a field | |
| 272 in the non-local frame structure for the given nesting context. */ | |
| 273 | |
| 274 static tree | |
| 275 lookup_field_for_decl (struct nesting_info *info, tree decl, | |
| 276 enum insert_option insert) | |
| 277 { | |
| 278 void **slot; | |
| 279 | |
| 280 if (insert == NO_INSERT) | |
| 281 { | |
| 282 slot = pointer_map_contains (info->field_map, decl); | |
| 283 return slot ? (tree) *slot : NULL_TREE; | |
| 284 } | |
| 285 | |
| 286 slot = pointer_map_insert (info->field_map, decl); | |
| 287 if (!*slot) | |
| 288 { | |
| 289 tree field = make_node (FIELD_DECL); | |
| 290 DECL_NAME (field) = DECL_NAME (decl); | |
| 291 | |
| 292 if (use_pointer_in_frame (decl)) | |
| 293 { | |
| 294 TREE_TYPE (field) = build_pointer_type (TREE_TYPE (decl)); | |
| 295 DECL_ALIGN (field) = TYPE_ALIGN (TREE_TYPE (field)); | |
| 296 DECL_NONADDRESSABLE_P (field) = 1; | |
| 297 } | |
| 298 else | |
| 299 { | |
| 300 TREE_TYPE (field) = TREE_TYPE (decl); | |
| 301 DECL_SOURCE_LOCATION (field) = DECL_SOURCE_LOCATION (decl); | |
| 302 DECL_ALIGN (field) = DECL_ALIGN (decl); | |
| 303 DECL_USER_ALIGN (field) = DECL_USER_ALIGN (decl); | |
| 304 TREE_ADDRESSABLE (field) = TREE_ADDRESSABLE (decl); | |
| 305 DECL_NONADDRESSABLE_P (field) = !TREE_ADDRESSABLE (decl); | |
| 306 TREE_THIS_VOLATILE (field) = TREE_THIS_VOLATILE (decl); | |
| 307 } | |
| 308 | |
| 309 insert_field_into_struct (get_frame_type (info), field); | |
| 310 *slot = field; | |
| 311 | |
| 312 if (TREE_CODE (decl) == PARM_DECL) | |
| 313 info->any_parm_remapped = true; | |
| 314 } | |
| 315 | |
| 316 return (tree) *slot; | |
| 317 } | |
| 318 | |
| 319 /* Build or return the variable that holds the static chain within | |
| 320 INFO->CONTEXT. This variable may only be used within INFO->CONTEXT. */ | |
| 321 | |
| 322 static tree | |
| 323 get_chain_decl (struct nesting_info *info) | |
| 324 { | |
| 325 tree decl = info->chain_decl; | |
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326 |
| 0 | 327 if (!decl) |
| 328 { | |
| 329 tree type; | |
| 330 | |
| 331 type = get_frame_type (info->outer); | |
| 332 type = build_pointer_type (type); | |
| 333 | |
| 334 /* Note that this variable is *not* entered into any BIND_EXPR; | |
| 335 the construction of this variable is handled specially in | |
| 336 expand_function_start and initialize_inlined_parameters. | |
| 337 Note also that it's represented as a parameter. This is more | |
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338 close to the truth, since the initial value does come from |
| 0 | 339 the caller. */ |
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340 decl = build_decl (DECL_SOURCE_LOCATION (info->context), |
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341 PARM_DECL, create_tmp_var_name ("CHAIN"), type); |
| 0 | 342 DECL_ARTIFICIAL (decl) = 1; |
| 343 DECL_IGNORED_P (decl) = 1; | |
| 344 TREE_USED (decl) = 1; | |
| 345 DECL_CONTEXT (decl) = info->context; | |
| 346 DECL_ARG_TYPE (decl) = type; | |
| 347 | |
| 348 /* Tell tree-inline.c that we never write to this variable, so | |
| 349 it can copy-prop the replacement value immediately. */ | |
| 350 TREE_READONLY (decl) = 1; | |
| 351 | |
| 352 info->chain_decl = decl; | |
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353 |
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354 if (dump_file |
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355 && (dump_flags & TDF_DETAILS) |
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356 && !DECL_STATIC_CHAIN (info->context)) |
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357 fprintf (dump_file, "Setting static-chain for %s\n", |
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358 lang_hooks.decl_printable_name (info->context, 2)); |
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359 |
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360 DECL_STATIC_CHAIN (info->context) = 1; |
| 0 | 361 } |
| 362 return decl; | |
| 363 } | |
| 364 | |
| 365 /* Build or return the field within the non-local frame state that holds | |
| 366 the static chain for INFO->CONTEXT. This is the way to walk back up | |
| 367 multiple nesting levels. */ | |
| 368 | |
| 369 static tree | |
| 370 get_chain_field (struct nesting_info *info) | |
| 371 { | |
| 372 tree field = info->chain_field; | |
|
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373 |
| 0 | 374 if (!field) |
| 375 { | |
| 376 tree type = build_pointer_type (get_frame_type (info->outer)); | |
| 377 | |
| 378 field = make_node (FIELD_DECL); | |
| 379 DECL_NAME (field) = get_identifier ("__chain"); | |
| 380 TREE_TYPE (field) = type; | |
| 381 DECL_ALIGN (field) = TYPE_ALIGN (type); | |
| 382 DECL_NONADDRESSABLE_P (field) = 1; | |
| 383 | |
| 384 insert_field_into_struct (get_frame_type (info), field); | |
| 385 | |
| 386 info->chain_field = field; | |
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387 |
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388 if (dump_file |
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389 && (dump_flags & TDF_DETAILS) |
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390 && !DECL_STATIC_CHAIN (info->context)) |
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391 fprintf (dump_file, "Setting static-chain for %s\n", |
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392 lang_hooks.decl_printable_name (info->context, 2)); |
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393 |
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394 DECL_STATIC_CHAIN (info->context) = 1; |
| 0 | 395 } |
| 396 return field; | |
| 397 } | |
| 398 | |
| 399 /* Initialize a new temporary with the GIMPLE_CALL STMT. */ | |
| 400 | |
| 401 static tree | |
| 402 init_tmp_var_with_call (struct nesting_info *info, gimple_stmt_iterator *gsi, | |
| 403 gimple call) | |
| 404 { | |
| 405 tree t; | |
| 406 | |
| 407 t = create_tmp_var_for (info, gimple_call_return_type (call), NULL); | |
| 408 gimple_call_set_lhs (call, t); | |
| 409 if (! gsi_end_p (*gsi)) | |
| 410 gimple_set_location (call, gimple_location (gsi_stmt (*gsi))); | |
| 411 gsi_insert_before (gsi, call, GSI_SAME_STMT); | |
| 412 | |
| 413 return t; | |
| 414 } | |
| 415 | |
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416 |
| 0 | 417 /* Copy EXP into a temporary. Allocate the temporary in the context of |
| 418 INFO and insert the initialization statement before GSI. */ | |
| 419 | |
| 420 static tree | |
| 421 init_tmp_var (struct nesting_info *info, tree exp, gimple_stmt_iterator *gsi) | |
| 422 { | |
| 423 tree t; | |
| 424 gimple stmt; | |
| 425 | |
| 426 t = create_tmp_var_for (info, TREE_TYPE (exp), NULL); | |
| 427 stmt = gimple_build_assign (t, exp); | |
| 428 if (! gsi_end_p (*gsi)) | |
| 429 gimple_set_location (stmt, gimple_location (gsi_stmt (*gsi))); | |
| 430 gsi_insert_before_without_update (gsi, stmt, GSI_SAME_STMT); | |
| 431 | |
| 432 return t; | |
| 433 } | |
| 434 | |
| 435 | |
| 436 /* Similarly, but only do so to force EXP to satisfy is_gimple_val. */ | |
| 437 | |
| 438 static tree | |
| 439 gsi_gimplify_val (struct nesting_info *info, tree exp, | |
| 440 gimple_stmt_iterator *gsi) | |
| 441 { | |
| 442 if (is_gimple_val (exp)) | |
| 443 return exp; | |
| 444 else | |
| 445 return init_tmp_var (info, exp, gsi); | |
| 446 } | |
| 447 | |
| 448 /* Similarly, but copy from the temporary and insert the statement | |
| 449 after the iterator. */ | |
| 450 | |
| 451 static tree | |
| 452 save_tmp_var (struct nesting_info *info, tree exp, gimple_stmt_iterator *gsi) | |
| 453 { | |
| 454 tree t; | |
| 455 gimple stmt; | |
| 456 | |
| 457 t = create_tmp_var_for (info, TREE_TYPE (exp), NULL); | |
| 458 stmt = gimple_build_assign (exp, t); | |
| 459 if (! gsi_end_p (*gsi)) | |
| 460 gimple_set_location (stmt, gimple_location (gsi_stmt (*gsi))); | |
| 461 gsi_insert_after_without_update (gsi, stmt, GSI_SAME_STMT); | |
| 462 | |
| 463 return t; | |
| 464 } | |
| 465 | |
| 466 /* Build or return the type used to represent a nested function trampoline. */ | |
| 467 | |
| 468 static GTY(()) tree trampoline_type; | |
| 469 | |
| 470 static tree | |
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471 get_trampoline_type (struct nesting_info *info) |
| 0 | 472 { |
| 473 unsigned align, size; | |
| 474 tree t; | |
| 475 | |
| 476 if (trampoline_type) | |
| 477 return trampoline_type; | |
| 478 | |
| 479 align = TRAMPOLINE_ALIGNMENT; | |
| 480 size = TRAMPOLINE_SIZE; | |
| 481 | |
| 482 /* If we won't be able to guarantee alignment simply via TYPE_ALIGN, | |
| 483 then allocate extra space so that we can do dynamic alignment. */ | |
| 484 if (align > STACK_BOUNDARY) | |
| 485 { | |
| 486 size += ((align/BITS_PER_UNIT) - 1) & -(STACK_BOUNDARY/BITS_PER_UNIT); | |
| 487 align = STACK_BOUNDARY; | |
| 488 } | |
| 489 | |
| 490 t = build_index_type (build_int_cst (NULL_TREE, size - 1)); | |
| 491 t = build_array_type (char_type_node, t); | |
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492 t = build_decl (DECL_SOURCE_LOCATION (info->context), |
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493 FIELD_DECL, get_identifier ("__data"), t); |
| 0 | 494 DECL_ALIGN (t) = align; |
| 495 DECL_USER_ALIGN (t) = 1; | |
| 496 | |
| 497 trampoline_type = make_node (RECORD_TYPE); | |
| 498 TYPE_NAME (trampoline_type) = get_identifier ("__builtin_trampoline"); | |
| 499 TYPE_FIELDS (trampoline_type) = t; | |
| 500 layout_type (trampoline_type); | |
| 501 DECL_CONTEXT (t) = trampoline_type; | |
| 502 | |
| 503 return trampoline_type; | |
| 504 } | |
| 505 | |
| 506 /* Given DECL, a nested function, find or create a field in the non-local | |
| 507 frame structure for a trampoline for this function. */ | |
| 508 | |
| 509 static tree | |
| 510 lookup_tramp_for_decl (struct nesting_info *info, tree decl, | |
| 511 enum insert_option insert) | |
| 512 { | |
| 513 void **slot; | |
| 514 | |
| 515 if (insert == NO_INSERT) | |
| 516 { | |
| 517 slot = pointer_map_contains (info->var_map, decl); | |
| 518 return slot ? (tree) *slot : NULL_TREE; | |
| 519 } | |
| 520 | |
| 521 slot = pointer_map_insert (info->var_map, decl); | |
| 522 if (!*slot) | |
| 523 { | |
| 524 tree field = make_node (FIELD_DECL); | |
| 525 DECL_NAME (field) = DECL_NAME (decl); | |
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526 TREE_TYPE (field) = get_trampoline_type (info); |
| 0 | 527 TREE_ADDRESSABLE (field) = 1; |
| 528 | |
| 529 insert_field_into_struct (get_frame_type (info), field); | |
| 530 *slot = field; | |
| 531 | |
| 532 info->any_tramp_created = true; | |
| 533 } | |
| 534 | |
| 535 return (tree) *slot; | |
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536 } |
| 0 | 537 |
| 538 /* Build or return the field within the non-local frame state that holds | |
| 539 the non-local goto "jmp_buf". The buffer itself is maintained by the | |
| 540 rtl middle-end as dynamic stack space is allocated. */ | |
| 541 | |
| 542 static tree | |
| 543 get_nl_goto_field (struct nesting_info *info) | |
| 544 { | |
| 545 tree field = info->nl_goto_field; | |
| 546 if (!field) | |
| 547 { | |
| 548 unsigned size; | |
| 549 tree type; | |
| 550 | |
| 551 /* For __builtin_nonlocal_goto, we need N words. The first is the | |
| 552 frame pointer, the rest is for the target's stack pointer save | |
| 553 area. The number of words is controlled by STACK_SAVEAREA_MODE; | |
| 554 not the best interface, but it'll do for now. */ | |
| 555 if (Pmode == ptr_mode) | |
| 556 type = ptr_type_node; | |
| 557 else | |
| 558 type = lang_hooks.types.type_for_mode (Pmode, 1); | |
| 559 | |
| 560 size = GET_MODE_SIZE (STACK_SAVEAREA_MODE (SAVE_NONLOCAL)); | |
| 561 size = size / GET_MODE_SIZE (Pmode); | |
| 562 size = size + 1; | |
| 563 | |
| 564 type = build_array_type | |
| 565 (type, build_index_type (build_int_cst (NULL_TREE, size))); | |
| 566 | |
| 567 field = make_node (FIELD_DECL); | |
| 568 DECL_NAME (field) = get_identifier ("__nl_goto_buf"); | |
| 569 TREE_TYPE (field) = type; | |
| 570 DECL_ALIGN (field) = TYPE_ALIGN (type); | |
| 571 TREE_ADDRESSABLE (field) = 1; | |
| 572 | |
| 573 insert_field_into_struct (get_frame_type (info), field); | |
| 574 | |
| 575 info->nl_goto_field = field; | |
| 576 } | |
| 577 | |
| 578 return field; | |
| 579 } | |
| 580 | |
| 581 /* Invoke CALLBACK on all statements of GIMPLE sequence SEQ. */ | |
| 582 | |
| 583 static void | |
| 584 walk_body (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, | |
| 585 struct nesting_info *info, gimple_seq seq) | |
| 586 { | |
| 587 struct walk_stmt_info wi; | |
| 588 | |
| 589 memset (&wi, 0, sizeof (wi)); | |
| 590 wi.info = info; | |
| 591 wi.val_only = true; | |
| 592 walk_gimple_seq (seq, callback_stmt, callback_op, &wi); | |
| 593 } | |
| 594 | |
| 595 | |
| 596 /* Invoke CALLBACK_STMT/CALLBACK_OP on all statements of INFO->CONTEXT. */ | |
| 597 | |
| 598 static inline void | |
| 599 walk_function (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, | |
| 600 struct nesting_info *info) | |
| 601 { | |
| 602 walk_body (callback_stmt, callback_op, info, gimple_body (info->context)); | |
| 603 } | |
| 604 | |
| 605 /* Invoke CALLBACK on a GIMPLE_OMP_FOR's init, cond, incr and pre-body. */ | |
| 606 | |
| 607 static void | |
| 608 walk_gimple_omp_for (gimple for_stmt, | |
| 609 walk_stmt_fn callback_stmt, walk_tree_fn callback_op, | |
| 610 struct nesting_info *info) | |
| 611 { | |
| 612 struct walk_stmt_info wi; | |
| 613 gimple_seq seq; | |
| 614 tree t; | |
| 615 size_t i; | |
| 616 | |
| 617 walk_body (callback_stmt, callback_op, info, gimple_omp_for_pre_body (for_stmt)); | |
| 618 | |
| 619 seq = gimple_seq_alloc (); | |
| 620 memset (&wi, 0, sizeof (wi)); | |
| 621 wi.info = info; | |
| 622 wi.gsi = gsi_last (seq); | |
| 623 | |
| 624 for (i = 0; i < gimple_omp_for_collapse (for_stmt); i++) | |
| 625 { | |
| 626 wi.val_only = false; | |
| 627 walk_tree (gimple_omp_for_index_ptr (for_stmt, i), callback_op, | |
| 628 &wi, NULL); | |
| 629 wi.val_only = true; | |
| 630 wi.is_lhs = false; | |
| 631 walk_tree (gimple_omp_for_initial_ptr (for_stmt, i), callback_op, | |
| 632 &wi, NULL); | |
| 633 | |
| 634 wi.val_only = true; | |
| 635 wi.is_lhs = false; | |
| 636 walk_tree (gimple_omp_for_final_ptr (for_stmt, i), callback_op, | |
| 637 &wi, NULL); | |
| 638 | |
| 639 t = gimple_omp_for_incr (for_stmt, i); | |
| 640 gcc_assert (BINARY_CLASS_P (t)); | |
| 641 wi.val_only = false; | |
| 642 walk_tree (&TREE_OPERAND (t, 0), callback_op, &wi, NULL); | |
| 643 wi.val_only = true; | |
| 644 wi.is_lhs = false; | |
| 645 walk_tree (&TREE_OPERAND (t, 1), callback_op, &wi, NULL); | |
| 646 } | |
| 647 | |
| 648 if (gimple_seq_empty_p (seq)) | |
| 649 gimple_seq_free (seq); | |
| 650 else | |
| 651 { | |
| 652 gimple_seq pre_body = gimple_omp_for_pre_body (for_stmt); | |
| 653 annotate_all_with_location (seq, gimple_location (for_stmt)); | |
| 654 gimple_seq_add_seq (&pre_body, seq); | |
| 655 gimple_omp_for_set_pre_body (for_stmt, pre_body); | |
| 656 } | |
| 657 } | |
| 658 | |
| 659 /* Similarly for ROOT and all functions nested underneath, depth first. */ | |
|
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660 |
| 0 | 661 static void |
| 662 walk_all_functions (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, | |
| 663 struct nesting_info *root) | |
| 664 { | |
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665 struct nesting_info *n; |
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666 FOR_EACH_NEST_INFO (n, root) |
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667 walk_function (callback_stmt, callback_op, n); |
| 0 | 668 } |
| 669 | |
| 670 | |
| 671 /* We have to check for a fairly pathological case. The operands of function | |
| 672 nested function are to be interpreted in the context of the enclosing | |
| 673 function. So if any are variably-sized, they will get remapped when the | |
| 674 enclosing function is inlined. But that remapping would also have to be | |
| 675 done in the types of the PARM_DECLs of the nested function, meaning the | |
| 676 argument types of that function will disagree with the arguments in the | |
| 677 calls to that function. So we'd either have to make a copy of the nested | |
| 678 function corresponding to each time the enclosing function was inlined or | |
| 679 add a VIEW_CONVERT_EXPR to each such operand for each call to the nested | |
| 680 function. The former is not practical. The latter would still require | |
| 681 detecting this case to know when to add the conversions. So, for now at | |
| 682 least, we don't inline such an enclosing function. | |
| 683 | |
| 684 We have to do that check recursively, so here return indicating whether | |
| 685 FNDECL has such a nested function. ORIG_FN is the function we were | |
| 686 trying to inline to use for checking whether any argument is variably | |
| 687 modified by anything in it. | |
| 688 | |
| 689 It would be better to do this in tree-inline.c so that we could give | |
| 690 the appropriate warning for why a function can't be inlined, but that's | |
| 691 too late since the nesting structure has already been flattened and | |
| 692 adding a flag just to record this fact seems a waste of a flag. */ | |
| 693 | |
| 694 static bool | |
| 695 check_for_nested_with_variably_modified (tree fndecl, tree orig_fndecl) | |
| 696 { | |
| 697 struct cgraph_node *cgn = cgraph_node (fndecl); | |
| 698 tree arg; | |
| 699 | |
| 700 for (cgn = cgn->nested; cgn ; cgn = cgn->next_nested) | |
| 701 { | |
| 702 for (arg = DECL_ARGUMENTS (cgn->decl); arg; arg = TREE_CHAIN (arg)) | |
| 703 if (variably_modified_type_p (TREE_TYPE (arg), orig_fndecl)) | |
| 704 return true; | |
| 705 | |
| 706 if (check_for_nested_with_variably_modified (cgn->decl, orig_fndecl)) | |
| 707 return true; | |
| 708 } | |
| 709 | |
| 710 return false; | |
| 711 } | |
| 712 | |
| 713 /* Construct our local datastructure describing the function nesting | |
| 714 tree rooted by CGN. */ | |
| 715 | |
| 716 static struct nesting_info * | |
| 717 create_nesting_tree (struct cgraph_node *cgn) | |
| 718 { | |
| 719 struct nesting_info *info = XCNEW (struct nesting_info); | |
| 720 info->field_map = pointer_map_create (); | |
| 721 info->var_map = pointer_map_create (); | |
| 722 info->suppress_expansion = BITMAP_ALLOC (&nesting_info_bitmap_obstack); | |
| 723 info->context = cgn->decl; | |
| 724 | |
| 725 for (cgn = cgn->nested; cgn ; cgn = cgn->next_nested) | |
| 726 { | |
| 727 struct nesting_info *sub = create_nesting_tree (cgn); | |
| 728 sub->outer = info; | |
| 729 sub->next = info->inner; | |
| 730 info->inner = sub; | |
| 731 } | |
| 732 | |
| 733 /* See discussion at check_for_nested_with_variably_modified for a | |
| 734 discussion of why this has to be here. */ | |
| 735 if (check_for_nested_with_variably_modified (info->context, info->context)) | |
| 736 DECL_UNINLINABLE (info->context) = true; | |
| 737 | |
| 738 return info; | |
| 739 } | |
| 740 | |
| 741 /* Return an expression computing the static chain for TARGET_CONTEXT | |
| 742 from INFO->CONTEXT. Insert any necessary computations before TSI. */ | |
| 743 | |
| 744 static tree | |
| 745 get_static_chain (struct nesting_info *info, tree target_context, | |
| 746 gimple_stmt_iterator *gsi) | |
| 747 { | |
| 748 struct nesting_info *i; | |
| 749 tree x; | |
| 750 | |
| 751 if (info->context == target_context) | |
| 752 { | |
| 753 x = build_addr (info->frame_decl, target_context); | |
| 754 } | |
| 755 else | |
| 756 { | |
| 757 x = get_chain_decl (info); | |
| 758 | |
| 759 for (i = info->outer; i->context != target_context; i = i->outer) | |
| 760 { | |
| 761 tree field = get_chain_field (i); | |
| 762 | |
| 763 x = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (x)), x); | |
| 764 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 765 x = init_tmp_var (info, x, gsi); | |
| 766 } | |
| 767 } | |
| 768 | |
| 769 return x; | |
| 770 } | |
| 771 | |
| 772 | |
| 773 /* Return an expression referencing FIELD from TARGET_CONTEXT's non-local | |
| 774 frame as seen from INFO->CONTEXT. Insert any necessary computations | |
| 775 before GSI. */ | |
| 776 | |
| 777 static tree | |
| 778 get_frame_field (struct nesting_info *info, tree target_context, | |
| 779 tree field, gimple_stmt_iterator *gsi) | |
| 780 { | |
| 781 struct nesting_info *i; | |
| 782 tree x; | |
| 783 | |
| 784 if (info->context == target_context) | |
| 785 { | |
| 786 /* Make sure frame_decl gets created. */ | |
| 787 (void) get_frame_type (info); | |
| 788 x = info->frame_decl; | |
| 789 } | |
| 790 else | |
| 791 { | |
| 792 x = get_chain_decl (info); | |
| 793 | |
| 794 for (i = info->outer; i->context != target_context; i = i->outer) | |
| 795 { | |
| 796 tree field = get_chain_field (i); | |
| 797 | |
| 798 x = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (x)), x); | |
| 799 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 800 x = init_tmp_var (info, x, gsi); | |
| 801 } | |
| 802 | |
| 803 x = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (x)), x); | |
| 804 } | |
| 805 | |
| 806 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 807 return x; | |
| 808 } | |
| 809 | |
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810 static void note_nonlocal_vla_type (struct nesting_info *info, tree type); |
| 0 | 811 |
| 812 /* A subroutine of convert_nonlocal_reference_op. Create a local variable | |
| 813 in the nested function with DECL_VALUE_EXPR set to reference the true | |
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814 variable in the parent function. This is used both for debug info |
| 0 | 815 and in OpenMP lowering. */ |
| 816 | |
| 817 static tree | |
| 818 get_nonlocal_debug_decl (struct nesting_info *info, tree decl) | |
| 819 { | |
| 820 tree target_context; | |
| 821 struct nesting_info *i; | |
| 822 tree x, field, new_decl; | |
| 823 void **slot; | |
| 824 | |
| 825 slot = pointer_map_insert (info->var_map, decl); | |
| 826 | |
| 827 if (*slot) | |
| 828 return (tree) *slot; | |
| 829 | |
| 830 target_context = decl_function_context (decl); | |
| 831 | |
| 832 /* A copy of the code in get_frame_field, but without the temporaries. */ | |
| 833 if (info->context == target_context) | |
| 834 { | |
| 835 /* Make sure frame_decl gets created. */ | |
| 836 (void) get_frame_type (info); | |
| 837 x = info->frame_decl; | |
| 838 i = info; | |
| 839 } | |
| 840 else | |
| 841 { | |
| 842 x = get_chain_decl (info); | |
| 843 for (i = info->outer; i->context != target_context; i = i->outer) | |
| 844 { | |
| 845 field = get_chain_field (i); | |
| 846 x = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (x)), x); | |
| 847 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 848 } | |
| 849 x = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (x)), x); | |
| 850 } | |
| 851 | |
| 852 field = lookup_field_for_decl (i, decl, INSERT); | |
| 853 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 854 if (use_pointer_in_frame (decl)) | |
| 855 x = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (x)), x); | |
| 856 | |
| 857 /* ??? We should be remapping types as well, surely. */ | |
|
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858 new_decl = build_decl (DECL_SOURCE_LOCATION (decl), |
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859 VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); |
| 0 | 860 DECL_CONTEXT (new_decl) = info->context; |
| 861 DECL_ARTIFICIAL (new_decl) = DECL_ARTIFICIAL (decl); | |
| 862 DECL_IGNORED_P (new_decl) = DECL_IGNORED_P (decl); | |
| 863 TREE_THIS_VOLATILE (new_decl) = TREE_THIS_VOLATILE (decl); | |
| 864 TREE_SIDE_EFFECTS (new_decl) = TREE_SIDE_EFFECTS (decl); | |
| 865 TREE_READONLY (new_decl) = TREE_READONLY (decl); | |
| 866 TREE_ADDRESSABLE (new_decl) = TREE_ADDRESSABLE (decl); | |
| 867 DECL_SEEN_IN_BIND_EXPR_P (new_decl) = 1; | |
|
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868 if ((TREE_CODE (decl) == PARM_DECL |
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869 || TREE_CODE (decl) == RESULT_DECL |
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870 || TREE_CODE (decl) == VAR_DECL) |
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871 && DECL_BY_REFERENCE (decl)) |
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872 DECL_BY_REFERENCE (new_decl) = 1; |
| 0 | 873 |
| 874 SET_DECL_VALUE_EXPR (new_decl, x); | |
| 875 DECL_HAS_VALUE_EXPR_P (new_decl) = 1; | |
| 876 | |
| 877 *slot = new_decl; | |
| 878 TREE_CHAIN (new_decl) = info->debug_var_chain; | |
| 879 info->debug_var_chain = new_decl; | |
| 880 | |
|
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881 if (!optimize |
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882 && info->context != target_context |
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883 && variably_modified_type_p (TREE_TYPE (decl), NULL)) |
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884 note_nonlocal_vla_type (info, TREE_TYPE (decl)); |
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885 |
| 0 | 886 return new_decl; |
| 887 } | |
| 888 | |
| 889 | |
| 890 /* Callback for walk_gimple_stmt, rewrite all references to VAR | |
| 891 and PARM_DECLs that belong to outer functions. | |
| 892 | |
| 893 The rewrite will involve some number of structure accesses back up | |
| 894 the static chain. E.g. for a variable FOO up one nesting level it'll | |
| 895 be CHAIN->FOO. For two levels it'll be CHAIN->__chain->FOO. Further | |
| 896 indirections apply to decls for which use_pointer_in_frame is true. */ | |
| 897 | |
| 898 static tree | |
| 899 convert_nonlocal_reference_op (tree *tp, int *walk_subtrees, void *data) | |
| 900 { | |
| 901 struct walk_stmt_info *wi = (struct walk_stmt_info *) data; | |
| 902 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 903 tree t = *tp; | |
| 904 | |
| 905 *walk_subtrees = 0; | |
| 906 switch (TREE_CODE (t)) | |
| 907 { | |
| 908 case VAR_DECL: | |
| 909 /* Non-automatic variables are never processed. */ | |
| 910 if (TREE_STATIC (t) || DECL_EXTERNAL (t)) | |
| 911 break; | |
| 912 /* FALLTHRU */ | |
| 913 | |
| 914 case PARM_DECL: | |
| 915 if (decl_function_context (t) != info->context) | |
| 916 { | |
| 917 tree x; | |
| 918 wi->changed = true; | |
| 919 | |
| 920 x = get_nonlocal_debug_decl (info, t); | |
| 921 if (!bitmap_bit_p (info->suppress_expansion, DECL_UID (t))) | |
| 922 { | |
| 923 tree target_context = decl_function_context (t); | |
| 924 struct nesting_info *i; | |
| 925 for (i = info->outer; i->context != target_context; i = i->outer) | |
| 926 continue; | |
| 927 x = lookup_field_for_decl (i, t, INSERT); | |
| 928 x = get_frame_field (info, target_context, x, &wi->gsi); | |
| 929 if (use_pointer_in_frame (t)) | |
| 930 { | |
| 931 x = init_tmp_var (info, x, &wi->gsi); | |
| 932 x = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (x)), x); | |
| 933 } | |
| 934 } | |
| 935 | |
| 936 if (wi->val_only) | |
| 937 { | |
| 938 if (wi->is_lhs) | |
| 939 x = save_tmp_var (info, x, &wi->gsi); | |
| 940 else | |
| 941 x = init_tmp_var (info, x, &wi->gsi); | |
| 942 } | |
| 943 | |
| 944 *tp = x; | |
| 945 } | |
| 946 break; | |
| 947 | |
| 948 case LABEL_DECL: | |
| 949 /* We're taking the address of a label from a parent function, but | |
| 950 this is not itself a non-local goto. Mark the label such that it | |
| 951 will not be deleted, much as we would with a label address in | |
| 952 static storage. */ | |
| 953 if (decl_function_context (t) != info->context) | |
| 954 FORCED_LABEL (t) = 1; | |
| 955 break; | |
| 956 | |
| 957 case ADDR_EXPR: | |
| 958 { | |
| 959 bool save_val_only = wi->val_only; | |
| 960 | |
| 961 wi->val_only = false; | |
| 962 wi->is_lhs = false; | |
| 963 wi->changed = false; | |
| 964 walk_tree (&TREE_OPERAND (t, 0), convert_nonlocal_reference_op, wi, 0); | |
| 965 wi->val_only = true; | |
| 966 | |
| 967 if (wi->changed) | |
| 968 { | |
| 969 tree save_context; | |
| 970 | |
| 971 /* If we changed anything, we might no longer be directly | |
| 972 referencing a decl. */ | |
| 973 save_context = current_function_decl; | |
| 974 current_function_decl = info->context; | |
| 975 recompute_tree_invariant_for_addr_expr (t); | |
| 976 current_function_decl = save_context; | |
| 977 | |
| 978 /* If the callback converted the address argument in a context | |
| 979 where we only accept variables (and min_invariant, presumably), | |
| 980 then compute the address into a temporary. */ | |
| 981 if (save_val_only) | |
| 982 *tp = gsi_gimplify_val ((struct nesting_info *) wi->info, | |
| 983 t, &wi->gsi); | |
| 984 } | |
| 985 } | |
| 986 break; | |
| 987 | |
| 988 case REALPART_EXPR: | |
| 989 case IMAGPART_EXPR: | |
| 990 case COMPONENT_REF: | |
| 991 case ARRAY_REF: | |
| 992 case ARRAY_RANGE_REF: | |
| 993 case BIT_FIELD_REF: | |
| 994 /* Go down this entire nest and just look at the final prefix and | |
| 995 anything that describes the references. Otherwise, we lose track | |
| 996 of whether a NOP_EXPR or VIEW_CONVERT_EXPR needs a simple value. */ | |
| 997 wi->val_only = true; | |
| 998 wi->is_lhs = false; | |
| 999 for (; handled_component_p (t); tp = &TREE_OPERAND (t, 0), t = *tp) | |
| 1000 { | |
| 1001 if (TREE_CODE (t) == COMPONENT_REF) | |
| 1002 walk_tree (&TREE_OPERAND (t, 2), convert_nonlocal_reference_op, wi, | |
| 1003 NULL); | |
| 1004 else if (TREE_CODE (t) == ARRAY_REF | |
| 1005 || TREE_CODE (t) == ARRAY_RANGE_REF) | |
| 1006 { | |
| 1007 walk_tree (&TREE_OPERAND (t, 1), convert_nonlocal_reference_op, | |
| 1008 wi, NULL); | |
| 1009 walk_tree (&TREE_OPERAND (t, 2), convert_nonlocal_reference_op, | |
| 1010 wi, NULL); | |
| 1011 walk_tree (&TREE_OPERAND (t, 3), convert_nonlocal_reference_op, | |
| 1012 wi, NULL); | |
| 1013 } | |
| 1014 else if (TREE_CODE (t) == BIT_FIELD_REF) | |
| 1015 { | |
| 1016 walk_tree (&TREE_OPERAND (t, 1), convert_nonlocal_reference_op, | |
| 1017 wi, NULL); | |
| 1018 walk_tree (&TREE_OPERAND (t, 2), convert_nonlocal_reference_op, | |
| 1019 wi, NULL); | |
| 1020 } | |
| 1021 } | |
| 1022 wi->val_only = false; | |
| 1023 walk_tree (tp, convert_nonlocal_reference_op, wi, NULL); | |
| 1024 break; | |
| 1025 | |
| 1026 case VIEW_CONVERT_EXPR: | |
| 1027 /* Just request to look at the subtrees, leaving val_only and lhs | |
| 1028 untouched. This might actually be for !val_only + lhs, in which | |
| 1029 case we don't want to force a replacement by a temporary. */ | |
| 1030 *walk_subtrees = 1; | |
| 1031 break; | |
| 1032 | |
| 1033 default: | |
| 1034 if (!IS_TYPE_OR_DECL_P (t)) | |
| 1035 { | |
| 1036 *walk_subtrees = 1; | |
| 1037 wi->val_only = true; | |
| 1038 wi->is_lhs = false; | |
| 1039 } | |
| 1040 break; | |
| 1041 } | |
| 1042 | |
| 1043 return NULL_TREE; | |
| 1044 } | |
| 1045 | |
| 1046 static tree convert_nonlocal_reference_stmt (gimple_stmt_iterator *, bool *, | |
| 1047 struct walk_stmt_info *); | |
| 1048 | |
| 1049 /* Helper for convert_nonlocal_references, rewrite all references to VAR | |
| 1050 and PARM_DECLs that belong to outer functions. */ | |
| 1051 | |
| 1052 static bool | |
| 1053 convert_nonlocal_omp_clauses (tree *pclauses, struct walk_stmt_info *wi) | |
| 1054 { | |
| 1055 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1056 bool need_chain = false, need_stmts = false; | |
| 1057 tree clause, decl; | |
| 1058 int dummy; | |
| 1059 bitmap new_suppress; | |
| 1060 | |
| 1061 new_suppress = BITMAP_GGC_ALLOC (); | |
| 1062 bitmap_copy (new_suppress, info->suppress_expansion); | |
| 1063 | |
| 1064 for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) | |
| 1065 { | |
| 1066 switch (OMP_CLAUSE_CODE (clause)) | |
| 1067 { | |
| 1068 case OMP_CLAUSE_REDUCTION: | |
| 1069 if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1070 need_stmts = true; | |
| 1071 goto do_decl_clause; | |
| 1072 | |
| 1073 case OMP_CLAUSE_LASTPRIVATE: | |
| 1074 if (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)) | |
| 1075 need_stmts = true; | |
| 1076 goto do_decl_clause; | |
| 1077 | |
| 1078 case OMP_CLAUSE_PRIVATE: | |
| 1079 case OMP_CLAUSE_FIRSTPRIVATE: | |
| 1080 case OMP_CLAUSE_COPYPRIVATE: | |
| 1081 case OMP_CLAUSE_SHARED: | |
| 1082 do_decl_clause: | |
| 1083 decl = OMP_CLAUSE_DECL (clause); | |
| 1084 if (TREE_CODE (decl) == VAR_DECL | |
| 1085 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) | |
| 1086 break; | |
| 1087 if (decl_function_context (decl) != info->context) | |
| 1088 { | |
| 1089 bitmap_set_bit (new_suppress, DECL_UID (decl)); | |
| 1090 OMP_CLAUSE_DECL (clause) = get_nonlocal_debug_decl (info, decl); | |
| 1091 need_chain = true; | |
| 1092 } | |
| 1093 break; | |
| 1094 | |
| 1095 case OMP_CLAUSE_SCHEDULE: | |
| 1096 if (OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (clause) == NULL) | |
| 1097 break; | |
| 1098 /* FALLTHRU */ | |
| 1099 case OMP_CLAUSE_IF: | |
| 1100 case OMP_CLAUSE_NUM_THREADS: | |
| 1101 wi->val_only = true; | |
| 1102 wi->is_lhs = false; | |
| 1103 convert_nonlocal_reference_op (&OMP_CLAUSE_OPERAND (clause, 0), | |
| 1104 &dummy, wi); | |
| 1105 break; | |
| 1106 | |
| 1107 case OMP_CLAUSE_NOWAIT: | |
| 1108 case OMP_CLAUSE_ORDERED: | |
| 1109 case OMP_CLAUSE_DEFAULT: | |
| 1110 case OMP_CLAUSE_COPYIN: | |
| 1111 case OMP_CLAUSE_COLLAPSE: | |
| 1112 case OMP_CLAUSE_UNTIED: | |
| 1113 break; | |
| 1114 | |
| 1115 default: | |
| 1116 gcc_unreachable (); | |
| 1117 } | |
| 1118 } | |
| 1119 | |
| 1120 info->suppress_expansion = new_suppress; | |
| 1121 | |
| 1122 if (need_stmts) | |
| 1123 for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) | |
| 1124 switch (OMP_CLAUSE_CODE (clause)) | |
| 1125 { | |
| 1126 case OMP_CLAUSE_REDUCTION: | |
| 1127 if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1128 { | |
| 1129 tree old_context | |
| 1130 = DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)); | |
| 1131 DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1132 = info->context; | |
| 1133 walk_body (convert_nonlocal_reference_stmt, | |
| 1134 convert_nonlocal_reference_op, info, | |
| 1135 OMP_CLAUSE_REDUCTION_GIMPLE_INIT (clause)); | |
| 1136 walk_body (convert_nonlocal_reference_stmt, | |
| 1137 convert_nonlocal_reference_op, info, | |
| 1138 OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (clause)); | |
| 1139 DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1140 = old_context; | |
| 1141 } | |
| 1142 break; | |
| 1143 | |
| 1144 case OMP_CLAUSE_LASTPRIVATE: | |
| 1145 walk_body (convert_nonlocal_reference_stmt, | |
| 1146 convert_nonlocal_reference_op, info, | |
| 1147 OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)); | |
| 1148 break; | |
| 1149 | |
| 1150 default: | |
| 1151 break; | |
| 1152 } | |
| 1153 | |
| 1154 return need_chain; | |
| 1155 } | |
| 1156 | |
|
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1157 /* Create nonlocal debug decls for nonlocal VLA array bounds. */ |
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1158 |
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1159 static void |
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1160 note_nonlocal_vla_type (struct nesting_info *info, tree type) |
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1161 { |
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1162 while (POINTER_TYPE_P (type) && !TYPE_NAME (type)) |
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1163 type = TREE_TYPE (type); |
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1164 |
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1165 if (TYPE_NAME (type) |
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1166 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
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1167 && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) |
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1168 type = DECL_ORIGINAL_TYPE (TYPE_NAME (type)); |
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1169 |
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1170 while (POINTER_TYPE_P (type) |
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1171 || TREE_CODE (type) == VECTOR_TYPE |
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1172 || TREE_CODE (type) == FUNCTION_TYPE |
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1173 || TREE_CODE (type) == METHOD_TYPE) |
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1174 type = TREE_TYPE (type); |
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1175 |
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1176 if (TREE_CODE (type) == ARRAY_TYPE) |
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1177 { |
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1178 tree domain, t; |
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1179 |
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1180 note_nonlocal_vla_type (info, TREE_TYPE (type)); |
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1181 domain = TYPE_DOMAIN (type); |
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1182 if (domain) |
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1183 { |
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1184 t = TYPE_MIN_VALUE (domain); |
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1185 if (t && (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == PARM_DECL) |
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1186 && decl_function_context (t) != info->context) |
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1187 get_nonlocal_debug_decl (info, t); |
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1188 t = TYPE_MAX_VALUE (domain); |
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1189 if (t && (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == PARM_DECL) |
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1190 && decl_function_context (t) != info->context) |
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1191 get_nonlocal_debug_decl (info, t); |
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1192 } |
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1193 } |
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1194 } |
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1195 |
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1196 /* Create nonlocal debug decls for nonlocal VLA array bounds for VLAs |
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1197 in BLOCK. */ |
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1198 |
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1199 static void |
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1200 note_nonlocal_block_vlas (struct nesting_info *info, tree block) |
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1201 { |
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1202 tree var; |
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1203 |
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1204 for (var = BLOCK_VARS (block); var; var = TREE_CHAIN (var)) |
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1205 if (TREE_CODE (var) == VAR_DECL |
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1206 && variably_modified_type_p (TREE_TYPE (var), NULL) |
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1207 && DECL_HAS_VALUE_EXPR_P (var) |
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1208 && decl_function_context (var) != info->context) |
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1209 note_nonlocal_vla_type (info, TREE_TYPE (var)); |
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1210 } |
| 0 | 1211 |
| 1212 /* Callback for walk_gimple_stmt. Rewrite all references to VAR and | |
| 1213 PARM_DECLs that belong to outer functions. This handles statements | |
| 1214 that are not handled via the standard recursion done in | |
| 1215 walk_gimple_stmt. STMT is the statement to examine, DATA is as in | |
| 1216 convert_nonlocal_reference_op. Set *HANDLED_OPS_P to true if all the | |
| 1217 operands of STMT have been handled by this function. */ | |
| 1218 | |
| 1219 static tree | |
| 1220 convert_nonlocal_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1221 struct walk_stmt_info *wi) | |
| 1222 { | |
| 1223 struct nesting_info *info = (struct nesting_info *) wi->info; | |
| 1224 tree save_local_var_chain; | |
| 1225 bitmap save_suppress; | |
| 1226 gimple stmt = gsi_stmt (*gsi); | |
| 1227 | |
| 1228 switch (gimple_code (stmt)) | |
| 1229 { | |
| 1230 case GIMPLE_GOTO: | |
| 1231 /* Don't walk non-local gotos for now. */ | |
| 1232 if (TREE_CODE (gimple_goto_dest (stmt)) != LABEL_DECL) | |
| 1233 { | |
| 1234 wi->val_only = true; | |
| 1235 wi->is_lhs = false; | |
| 1236 *handled_ops_p = true; | |
| 1237 return NULL_TREE; | |
| 1238 } | |
| 1239 break; | |
| 1240 | |
| 1241 case GIMPLE_OMP_PARALLEL: | |
| 1242 case GIMPLE_OMP_TASK: | |
| 1243 save_suppress = info->suppress_expansion; | |
| 1244 if (convert_nonlocal_omp_clauses (gimple_omp_taskreg_clauses_ptr (stmt), | |
| 1245 wi)) | |
| 1246 { | |
| 1247 tree c, decl; | |
| 1248 decl = get_chain_decl (info); | |
|
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1249 c = build_omp_clause (gimple_location (stmt), |
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1250 OMP_CLAUSE_FIRSTPRIVATE); |
| 0 | 1251 OMP_CLAUSE_DECL (c) = decl; |
| 1252 OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); | |
| 1253 gimple_omp_taskreg_set_clauses (stmt, c); | |
| 1254 } | |
| 1255 | |
| 1256 save_local_var_chain = info->new_local_var_chain; | |
| 1257 info->new_local_var_chain = NULL; | |
| 1258 | |
| 1259 walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, | |
| 1260 info, gimple_omp_body (stmt)); | |
| 1261 | |
| 1262 if (info->new_local_var_chain) | |
| 1263 declare_vars (info->new_local_var_chain, | |
| 1264 gimple_seq_first_stmt (gimple_omp_body (stmt)), | |
| 1265 false); | |
| 1266 info->new_local_var_chain = save_local_var_chain; | |
| 1267 info->suppress_expansion = save_suppress; | |
| 1268 break; | |
| 1269 | |
| 1270 case GIMPLE_OMP_FOR: | |
| 1271 save_suppress = info->suppress_expansion; | |
| 1272 convert_nonlocal_omp_clauses (gimple_omp_for_clauses_ptr (stmt), wi); | |
| 1273 walk_gimple_omp_for (stmt, convert_nonlocal_reference_stmt, | |
| 1274 convert_nonlocal_reference_op, info); | |
| 1275 walk_body (convert_nonlocal_reference_stmt, | |
| 1276 convert_nonlocal_reference_op, info, gimple_omp_body (stmt)); | |
| 1277 info->suppress_expansion = save_suppress; | |
| 1278 break; | |
| 1279 | |
| 1280 case GIMPLE_OMP_SECTIONS: | |
| 1281 save_suppress = info->suppress_expansion; | |
| 1282 convert_nonlocal_omp_clauses (gimple_omp_sections_clauses_ptr (stmt), wi); | |
| 1283 walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, | |
| 1284 info, gimple_omp_body (stmt)); | |
| 1285 info->suppress_expansion = save_suppress; | |
| 1286 break; | |
| 1287 | |
| 1288 case GIMPLE_OMP_SINGLE: | |
| 1289 save_suppress = info->suppress_expansion; | |
| 1290 convert_nonlocal_omp_clauses (gimple_omp_single_clauses_ptr (stmt), wi); | |
| 1291 walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, | |
| 1292 info, gimple_omp_body (stmt)); | |
| 1293 info->suppress_expansion = save_suppress; | |
| 1294 break; | |
| 1295 | |
| 1296 case GIMPLE_OMP_SECTION: | |
| 1297 case GIMPLE_OMP_MASTER: | |
| 1298 case GIMPLE_OMP_ORDERED: | |
| 1299 walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, | |
| 1300 info, gimple_omp_body (stmt)); | |
| 1301 break; | |
| 1302 | |
|
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1303 case GIMPLE_BIND: |
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1304 if (!optimize && gimple_bind_block (stmt)) |
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1305 note_nonlocal_block_vlas (info, gimple_bind_block (stmt)); |
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1306 |
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1307 *handled_ops_p = false; |
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1308 return NULL_TREE; |
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1309 |
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1310 case GIMPLE_COND: |
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1311 wi->val_only = true; |
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1312 wi->is_lhs = false; |
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1313 *handled_ops_p = false; |
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1314 return NULL_TREE; |
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1315 |
| 0 | 1316 default: |
| 1317 /* For every other statement that we are not interested in | |
| 1318 handling here, let the walker traverse the operands. */ | |
| 1319 *handled_ops_p = false; | |
| 1320 return NULL_TREE; | |
| 1321 } | |
| 1322 | |
| 1323 /* We have handled all of STMT operands, no need to traverse the operands. */ | |
| 1324 *handled_ops_p = true; | |
| 1325 return NULL_TREE; | |
| 1326 } | |
| 1327 | |
| 1328 | |
| 1329 /* A subroutine of convert_local_reference. Create a local variable | |
| 1330 in the parent function with DECL_VALUE_EXPR set to reference the | |
| 1331 field in FRAME. This is used both for debug info and in OpenMP | |
| 1332 lowering. */ | |
| 1333 | |
| 1334 static tree | |
| 1335 get_local_debug_decl (struct nesting_info *info, tree decl, tree field) | |
| 1336 { | |
| 1337 tree x, new_decl; | |
| 1338 void **slot; | |
| 1339 | |
| 1340 slot = pointer_map_insert (info->var_map, decl); | |
| 1341 if (*slot) | |
| 1342 return (tree) *slot; | |
| 1343 | |
| 1344 /* Make sure frame_decl gets created. */ | |
| 1345 (void) get_frame_type (info); | |
| 1346 x = info->frame_decl; | |
| 1347 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 1348 | |
|
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1349 new_decl = build_decl (DECL_SOURCE_LOCATION (decl), |
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1350 VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); |
| 0 | 1351 DECL_CONTEXT (new_decl) = info->context; |
| 1352 DECL_ARTIFICIAL (new_decl) = DECL_ARTIFICIAL (decl); | |
| 1353 DECL_IGNORED_P (new_decl) = DECL_IGNORED_P (decl); | |
| 1354 TREE_THIS_VOLATILE (new_decl) = TREE_THIS_VOLATILE (decl); | |
| 1355 TREE_SIDE_EFFECTS (new_decl) = TREE_SIDE_EFFECTS (decl); | |
| 1356 TREE_READONLY (new_decl) = TREE_READONLY (decl); | |
| 1357 TREE_ADDRESSABLE (new_decl) = TREE_ADDRESSABLE (decl); | |
| 1358 DECL_SEEN_IN_BIND_EXPR_P (new_decl) = 1; | |
|
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1359 if ((TREE_CODE (decl) == PARM_DECL |
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1360 || TREE_CODE (decl) == RESULT_DECL |
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1361 || TREE_CODE (decl) == VAR_DECL) |
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1362 && DECL_BY_REFERENCE (decl)) |
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1363 DECL_BY_REFERENCE (new_decl) = 1; |
| 0 | 1364 |
| 1365 SET_DECL_VALUE_EXPR (new_decl, x); | |
| 1366 DECL_HAS_VALUE_EXPR_P (new_decl) = 1; | |
| 1367 *slot = new_decl; | |
| 1368 | |
| 1369 TREE_CHAIN (new_decl) = info->debug_var_chain; | |
| 1370 info->debug_var_chain = new_decl; | |
| 1371 | |
| 1372 /* Do not emit debug info twice. */ | |
| 1373 DECL_IGNORED_P (decl) = 1; | |
| 1374 | |
| 1375 return new_decl; | |
| 1376 } | |
| 1377 | |
| 1378 | |
| 1379 /* Called via walk_function+walk_gimple_stmt, rewrite all references to VAR | |
| 1380 and PARM_DECLs that were referenced by inner nested functions. | |
| 1381 The rewrite will be a structure reference to the local frame variable. */ | |
| 1382 | |
| 1383 static bool convert_local_omp_clauses (tree *, struct walk_stmt_info *); | |
| 1384 | |
| 1385 static tree | |
| 1386 convert_local_reference_op (tree *tp, int *walk_subtrees, void *data) | |
| 1387 { | |
| 1388 struct walk_stmt_info *wi = (struct walk_stmt_info *) data; | |
| 1389 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1390 tree t = *tp, field, x; | |
| 1391 bool save_val_only; | |
| 1392 | |
| 1393 *walk_subtrees = 0; | |
| 1394 switch (TREE_CODE (t)) | |
| 1395 { | |
| 1396 case VAR_DECL: | |
| 1397 /* Non-automatic variables are never processed. */ | |
| 1398 if (TREE_STATIC (t) || DECL_EXTERNAL (t)) | |
| 1399 break; | |
| 1400 /* FALLTHRU */ | |
| 1401 | |
| 1402 case PARM_DECL: | |
| 1403 if (decl_function_context (t) == info->context) | |
| 1404 { | |
| 1405 /* If we copied a pointer to the frame, then the original decl | |
| 1406 is used unchanged in the parent function. */ | |
| 1407 if (use_pointer_in_frame (t)) | |
| 1408 break; | |
| 1409 | |
| 1410 /* No need to transform anything if no child references the | |
| 1411 variable. */ | |
| 1412 field = lookup_field_for_decl (info, t, NO_INSERT); | |
| 1413 if (!field) | |
| 1414 break; | |
| 1415 wi->changed = true; | |
| 1416 | |
| 1417 x = get_local_debug_decl (info, t, field); | |
| 1418 if (!bitmap_bit_p (info->suppress_expansion, DECL_UID (t))) | |
| 1419 x = get_frame_field (info, info->context, field, &wi->gsi); | |
| 1420 | |
| 1421 if (wi->val_only) | |
| 1422 { | |
| 1423 if (wi->is_lhs) | |
| 1424 x = save_tmp_var (info, x, &wi->gsi); | |
| 1425 else | |
| 1426 x = init_tmp_var (info, x, &wi->gsi); | |
| 1427 } | |
| 1428 | |
| 1429 *tp = x; | |
| 1430 } | |
| 1431 break; | |
| 1432 | |
| 1433 case ADDR_EXPR: | |
| 1434 save_val_only = wi->val_only; | |
| 1435 wi->val_only = false; | |
| 1436 wi->is_lhs = false; | |
| 1437 wi->changed = false; | |
| 1438 walk_tree (&TREE_OPERAND (t, 0), convert_local_reference_op, wi, NULL); | |
| 1439 wi->val_only = save_val_only; | |
| 1440 | |
| 1441 /* If we converted anything ... */ | |
| 1442 if (wi->changed) | |
| 1443 { | |
| 1444 tree save_context; | |
| 1445 | |
| 1446 /* Then the frame decl is now addressable. */ | |
| 1447 TREE_ADDRESSABLE (info->frame_decl) = 1; | |
|
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1448 |
| 0 | 1449 save_context = current_function_decl; |
| 1450 current_function_decl = info->context; | |
| 1451 recompute_tree_invariant_for_addr_expr (t); | |
| 1452 current_function_decl = save_context; | |
| 1453 | |
| 1454 /* If we are in a context where we only accept values, then | |
| 1455 compute the address into a temporary. */ | |
| 1456 if (save_val_only) | |
| 1457 *tp = gsi_gimplify_val ((struct nesting_info *) wi->info, | |
| 1458 t, &wi->gsi); | |
| 1459 } | |
| 1460 break; | |
| 1461 | |
| 1462 case REALPART_EXPR: | |
| 1463 case IMAGPART_EXPR: | |
| 1464 case COMPONENT_REF: | |
| 1465 case ARRAY_REF: | |
| 1466 case ARRAY_RANGE_REF: | |
| 1467 case BIT_FIELD_REF: | |
| 1468 /* Go down this entire nest and just look at the final prefix and | |
| 1469 anything that describes the references. Otherwise, we lose track | |
| 1470 of whether a NOP_EXPR or VIEW_CONVERT_EXPR needs a simple value. */ | |
| 1471 save_val_only = wi->val_only; | |
| 1472 wi->val_only = true; | |
| 1473 wi->is_lhs = false; | |
| 1474 for (; handled_component_p (t); tp = &TREE_OPERAND (t, 0), t = *tp) | |
| 1475 { | |
| 1476 if (TREE_CODE (t) == COMPONENT_REF) | |
| 1477 walk_tree (&TREE_OPERAND (t, 2), convert_local_reference_op, wi, | |
| 1478 NULL); | |
| 1479 else if (TREE_CODE (t) == ARRAY_REF | |
| 1480 || TREE_CODE (t) == ARRAY_RANGE_REF) | |
| 1481 { | |
| 1482 walk_tree (&TREE_OPERAND (t, 1), convert_local_reference_op, wi, | |
| 1483 NULL); | |
| 1484 walk_tree (&TREE_OPERAND (t, 2), convert_local_reference_op, wi, | |
| 1485 NULL); | |
| 1486 walk_tree (&TREE_OPERAND (t, 3), convert_local_reference_op, wi, | |
| 1487 NULL); | |
| 1488 } | |
| 1489 else if (TREE_CODE (t) == BIT_FIELD_REF) | |
| 1490 { | |
| 1491 walk_tree (&TREE_OPERAND (t, 1), convert_local_reference_op, wi, | |
| 1492 NULL); | |
| 1493 walk_tree (&TREE_OPERAND (t, 2), convert_local_reference_op, wi, | |
| 1494 NULL); | |
| 1495 } | |
| 1496 } | |
| 1497 wi->val_only = false; | |
| 1498 walk_tree (tp, convert_local_reference_op, wi, NULL); | |
| 1499 wi->val_only = save_val_only; | |
| 1500 break; | |
| 1501 | |
| 1502 case VIEW_CONVERT_EXPR: | |
| 1503 /* Just request to look at the subtrees, leaving val_only and lhs | |
| 1504 untouched. This might actually be for !val_only + lhs, in which | |
| 1505 case we don't want to force a replacement by a temporary. */ | |
| 1506 *walk_subtrees = 1; | |
| 1507 break; | |
| 1508 | |
| 1509 default: | |
| 1510 if (!IS_TYPE_OR_DECL_P (t)) | |
| 1511 { | |
| 1512 *walk_subtrees = 1; | |
| 1513 wi->val_only = true; | |
| 1514 wi->is_lhs = false; | |
| 1515 } | |
| 1516 break; | |
| 1517 } | |
| 1518 | |
| 1519 return NULL_TREE; | |
| 1520 } | |
| 1521 | |
| 1522 static tree convert_local_reference_stmt (gimple_stmt_iterator *, bool *, | |
| 1523 struct walk_stmt_info *); | |
| 1524 | |
| 1525 /* Helper for convert_local_reference. Convert all the references in | |
| 1526 the chain of clauses at *PCLAUSES. WI is as in convert_local_reference. */ | |
| 1527 | |
| 1528 static bool | |
| 1529 convert_local_omp_clauses (tree *pclauses, struct walk_stmt_info *wi) | |
| 1530 { | |
| 1531 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1532 bool need_frame = false, need_stmts = false; | |
| 1533 tree clause, decl; | |
| 1534 int dummy; | |
| 1535 bitmap new_suppress; | |
| 1536 | |
| 1537 new_suppress = BITMAP_GGC_ALLOC (); | |
| 1538 bitmap_copy (new_suppress, info->suppress_expansion); | |
| 1539 | |
| 1540 for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) | |
| 1541 { | |
| 1542 switch (OMP_CLAUSE_CODE (clause)) | |
| 1543 { | |
| 1544 case OMP_CLAUSE_REDUCTION: | |
| 1545 if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1546 need_stmts = true; | |
| 1547 goto do_decl_clause; | |
| 1548 | |
| 1549 case OMP_CLAUSE_LASTPRIVATE: | |
| 1550 if (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)) | |
| 1551 need_stmts = true; | |
| 1552 goto do_decl_clause; | |
| 1553 | |
| 1554 case OMP_CLAUSE_PRIVATE: | |
| 1555 case OMP_CLAUSE_FIRSTPRIVATE: | |
| 1556 case OMP_CLAUSE_COPYPRIVATE: | |
| 1557 case OMP_CLAUSE_SHARED: | |
| 1558 do_decl_clause: | |
| 1559 decl = OMP_CLAUSE_DECL (clause); | |
| 1560 if (TREE_CODE (decl) == VAR_DECL | |
| 1561 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) | |
| 1562 break; | |
| 1563 if (decl_function_context (decl) == info->context | |
| 1564 && !use_pointer_in_frame (decl)) | |
| 1565 { | |
| 1566 tree field = lookup_field_for_decl (info, decl, NO_INSERT); | |
| 1567 if (field) | |
| 1568 { | |
| 1569 bitmap_set_bit (new_suppress, DECL_UID (decl)); | |
| 1570 OMP_CLAUSE_DECL (clause) | |
| 1571 = get_local_debug_decl (info, decl, field); | |
| 1572 need_frame = true; | |
| 1573 } | |
| 1574 } | |
| 1575 break; | |
| 1576 | |
| 1577 case OMP_CLAUSE_SCHEDULE: | |
| 1578 if (OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (clause) == NULL) | |
| 1579 break; | |
| 1580 /* FALLTHRU */ | |
| 1581 case OMP_CLAUSE_IF: | |
| 1582 case OMP_CLAUSE_NUM_THREADS: | |
| 1583 wi->val_only = true; | |
| 1584 wi->is_lhs = false; | |
| 1585 convert_local_reference_op (&OMP_CLAUSE_OPERAND (clause, 0), &dummy, | |
| 1586 wi); | |
| 1587 break; | |
| 1588 | |
| 1589 case OMP_CLAUSE_NOWAIT: | |
| 1590 case OMP_CLAUSE_ORDERED: | |
| 1591 case OMP_CLAUSE_DEFAULT: | |
| 1592 case OMP_CLAUSE_COPYIN: | |
| 1593 case OMP_CLAUSE_COLLAPSE: | |
| 1594 case OMP_CLAUSE_UNTIED: | |
| 1595 break; | |
| 1596 | |
| 1597 default: | |
| 1598 gcc_unreachable (); | |
| 1599 } | |
| 1600 } | |
| 1601 | |
| 1602 info->suppress_expansion = new_suppress; | |
| 1603 | |
| 1604 if (need_stmts) | |
| 1605 for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) | |
| 1606 switch (OMP_CLAUSE_CODE (clause)) | |
| 1607 { | |
| 1608 case OMP_CLAUSE_REDUCTION: | |
| 1609 if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1610 { | |
| 1611 tree old_context | |
| 1612 = DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)); | |
| 1613 DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1614 = info->context; | |
| 1615 walk_body (convert_local_reference_stmt, | |
| 1616 convert_local_reference_op, info, | |
| 1617 OMP_CLAUSE_REDUCTION_GIMPLE_INIT (clause)); | |
| 1618 walk_body (convert_local_reference_stmt, | |
| 1619 convert_local_reference_op, info, | |
| 1620 OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (clause)); | |
| 1621 DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1622 = old_context; | |
| 1623 } | |
| 1624 break; | |
| 1625 | |
| 1626 case OMP_CLAUSE_LASTPRIVATE: | |
| 1627 walk_body (convert_local_reference_stmt, | |
| 1628 convert_local_reference_op, info, | |
| 1629 OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)); | |
| 1630 break; | |
| 1631 | |
| 1632 default: | |
| 1633 break; | |
| 1634 } | |
| 1635 | |
| 1636 return need_frame; | |
| 1637 } | |
| 1638 | |
| 1639 | |
| 1640 /* Called via walk_function+walk_gimple_stmt, rewrite all references to VAR | |
| 1641 and PARM_DECLs that were referenced by inner nested functions. | |
| 1642 The rewrite will be a structure reference to the local frame variable. */ | |
| 1643 | |
| 1644 static tree | |
| 1645 convert_local_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1646 struct walk_stmt_info *wi) | |
| 1647 { | |
| 1648 struct nesting_info *info = (struct nesting_info *) wi->info; | |
| 1649 tree save_local_var_chain; | |
| 1650 bitmap save_suppress; | |
| 1651 gimple stmt = gsi_stmt (*gsi); | |
| 1652 | |
| 1653 switch (gimple_code (stmt)) | |
| 1654 { | |
| 1655 case GIMPLE_OMP_PARALLEL: | |
| 1656 case GIMPLE_OMP_TASK: | |
| 1657 save_suppress = info->suppress_expansion; | |
| 1658 if (convert_local_omp_clauses (gimple_omp_taskreg_clauses_ptr (stmt), | |
| 1659 wi)) | |
| 1660 { | |
| 1661 tree c; | |
| 1662 (void) get_frame_type (info); | |
|
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1663 c = build_omp_clause (gimple_location (stmt), |
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1664 OMP_CLAUSE_SHARED); |
| 0 | 1665 OMP_CLAUSE_DECL (c) = info->frame_decl; |
| 1666 OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); | |
| 1667 gimple_omp_taskreg_set_clauses (stmt, c); | |
| 1668 } | |
| 1669 | |
| 1670 save_local_var_chain = info->new_local_var_chain; | |
| 1671 info->new_local_var_chain = NULL; | |
| 1672 | |
| 1673 walk_body (convert_local_reference_stmt, convert_local_reference_op, info, | |
| 1674 gimple_omp_body (stmt)); | |
| 1675 | |
| 1676 if (info->new_local_var_chain) | |
| 1677 declare_vars (info->new_local_var_chain, | |
| 1678 gimple_seq_first_stmt (gimple_omp_body (stmt)), false); | |
| 1679 info->new_local_var_chain = save_local_var_chain; | |
| 1680 info->suppress_expansion = save_suppress; | |
| 1681 break; | |
| 1682 | |
| 1683 case GIMPLE_OMP_FOR: | |
| 1684 save_suppress = info->suppress_expansion; | |
| 1685 convert_local_omp_clauses (gimple_omp_for_clauses_ptr (stmt), wi); | |
| 1686 walk_gimple_omp_for (stmt, convert_local_reference_stmt, | |
| 1687 convert_local_reference_op, info); | |
| 1688 walk_body (convert_local_reference_stmt, convert_local_reference_op, | |
| 1689 info, gimple_omp_body (stmt)); | |
| 1690 info->suppress_expansion = save_suppress; | |
| 1691 break; | |
| 1692 | |
| 1693 case GIMPLE_OMP_SECTIONS: | |
| 1694 save_suppress = info->suppress_expansion; | |
| 1695 convert_local_omp_clauses (gimple_omp_sections_clauses_ptr (stmt), wi); | |
| 1696 walk_body (convert_local_reference_stmt, convert_local_reference_op, | |
| 1697 info, gimple_omp_body (stmt)); | |
| 1698 info->suppress_expansion = save_suppress; | |
| 1699 break; | |
| 1700 | |
| 1701 case GIMPLE_OMP_SINGLE: | |
| 1702 save_suppress = info->suppress_expansion; | |
| 1703 convert_local_omp_clauses (gimple_omp_single_clauses_ptr (stmt), wi); | |
| 1704 walk_body (convert_local_reference_stmt, convert_local_reference_op, | |
| 1705 info, gimple_omp_body (stmt)); | |
| 1706 info->suppress_expansion = save_suppress; | |
| 1707 break; | |
| 1708 | |
| 1709 case GIMPLE_OMP_SECTION: | |
| 1710 case GIMPLE_OMP_MASTER: | |
| 1711 case GIMPLE_OMP_ORDERED: | |
| 1712 walk_body (convert_local_reference_stmt, convert_local_reference_op, | |
| 1713 info, gimple_omp_body (stmt)); | |
| 1714 break; | |
| 1715 | |
|
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1716 case GIMPLE_COND: |
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1717 wi->val_only = true; |
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1718 wi->is_lhs = false; |
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1719 *handled_ops_p = false; |
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1720 return NULL_TREE; |
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1721 |
| 0 | 1722 default: |
| 1723 /* For every other statement that we are not interested in | |
| 1724 handling here, let the walker traverse the operands. */ | |
| 1725 *handled_ops_p = false; | |
| 1726 return NULL_TREE; | |
| 1727 } | |
| 1728 | |
| 1729 /* Indicate that we have handled all the operands ourselves. */ | |
| 1730 *handled_ops_p = true; | |
| 1731 return NULL_TREE; | |
| 1732 } | |
| 1733 | |
| 1734 | |
| 1735 /* Called via walk_function+walk_gimple_stmt, rewrite all GIMPLE_GOTOs | |
| 1736 that reference labels from outer functions. The rewrite will be a | |
| 1737 call to __builtin_nonlocal_goto. */ | |
| 1738 | |
| 1739 static tree | |
| 1740 convert_nl_goto_reference (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1741 struct walk_stmt_info *wi) | |
| 1742 { | |
| 1743 struct nesting_info *const info = (struct nesting_info *) wi->info, *i; | |
| 1744 tree label, new_label, target_context, x, field; | |
| 1745 void **slot; | |
| 1746 gimple call; | |
| 1747 gimple stmt = gsi_stmt (*gsi); | |
| 1748 | |
| 1749 if (gimple_code (stmt) != GIMPLE_GOTO) | |
| 1750 { | |
| 1751 *handled_ops_p = false; | |
| 1752 return NULL_TREE; | |
| 1753 } | |
| 1754 | |
| 1755 label = gimple_goto_dest (stmt); | |
| 1756 if (TREE_CODE (label) != LABEL_DECL) | |
| 1757 { | |
| 1758 *handled_ops_p = false; | |
| 1759 return NULL_TREE; | |
| 1760 } | |
| 1761 | |
| 1762 target_context = decl_function_context (label); | |
| 1763 if (target_context == info->context) | |
| 1764 { | |
| 1765 *handled_ops_p = false; | |
| 1766 return NULL_TREE; | |
| 1767 } | |
| 1768 | |
| 1769 for (i = info->outer; target_context != i->context; i = i->outer) | |
| 1770 continue; | |
| 1771 | |
| 1772 /* The original user label may also be use for a normal goto, therefore | |
| 1773 we must create a new label that will actually receive the abnormal | |
| 1774 control transfer. This new label will be marked LABEL_NONLOCAL; this | |
| 1775 mark will trigger proper behavior in the cfg, as well as cause the | |
| 1776 (hairy target-specific) non-local goto receiver code to be generated | |
| 1777 when we expand rtl. Enter this association into var_map so that we | |
| 1778 can insert the new label into the IL during a second pass. */ | |
| 1779 slot = pointer_map_insert (i->var_map, label); | |
| 1780 if (*slot == NULL) | |
| 1781 { | |
|
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1782 new_label = create_artificial_label (UNKNOWN_LOCATION); |
| 0 | 1783 DECL_NONLOCAL (new_label) = 1; |
| 1784 *slot = new_label; | |
| 1785 } | |
| 1786 else | |
| 1787 new_label = (tree) *slot; | |
|
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1788 |
| 0 | 1789 /* Build: __builtin_nl_goto(new_label, &chain->nl_goto_field). */ |
| 1790 field = get_nl_goto_field (i); | |
| 1791 x = get_frame_field (info, target_context, field, &wi->gsi); | |
| 1792 x = build_addr (x, target_context); | |
| 1793 x = gsi_gimplify_val (info, x, &wi->gsi); | |
| 1794 call = gimple_build_call (implicit_built_in_decls[BUILT_IN_NONLOCAL_GOTO], 2, | |
| 1795 build_addr (new_label, target_context), x); | |
| 1796 gsi_replace (&wi->gsi, call, false); | |
| 1797 | |
| 1798 /* We have handled all of STMT's operands, no need to keep going. */ | |
| 1799 *handled_ops_p = true; | |
| 1800 return NULL_TREE; | |
| 1801 } | |
| 1802 | |
| 1803 | |
| 1804 /* Called via walk_function+walk_tree, rewrite all GIMPLE_LABELs whose labels | |
| 1805 are referenced via nonlocal goto from a nested function. The rewrite | |
| 1806 will involve installing a newly generated DECL_NONLOCAL label, and | |
| 1807 (potentially) a branch around the rtl gunk that is assumed to be | |
| 1808 attached to such a label. */ | |
| 1809 | |
| 1810 static tree | |
| 1811 convert_nl_goto_receiver (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1812 struct walk_stmt_info *wi) | |
| 1813 { | |
| 1814 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1815 tree label, new_label; | |
| 1816 gimple_stmt_iterator tmp_gsi; | |
| 1817 void **slot; | |
| 1818 gimple stmt = gsi_stmt (*gsi); | |
| 1819 | |
| 1820 if (gimple_code (stmt) != GIMPLE_LABEL) | |
| 1821 { | |
| 1822 *handled_ops_p = false; | |
| 1823 return NULL_TREE; | |
| 1824 } | |
| 1825 | |
| 1826 label = gimple_label_label (stmt); | |
| 1827 | |
| 1828 slot = pointer_map_contains (info->var_map, label); | |
| 1829 if (!slot) | |
| 1830 { | |
| 1831 *handled_ops_p = false; | |
| 1832 return NULL_TREE; | |
| 1833 } | |
| 1834 | |
| 1835 /* If there's any possibility that the previous statement falls through, | |
| 1836 then we must branch around the new non-local label. */ | |
| 1837 tmp_gsi = wi->gsi; | |
| 1838 gsi_prev (&tmp_gsi); | |
| 1839 if (gsi_end_p (tmp_gsi) || gimple_stmt_may_fallthru (gsi_stmt (tmp_gsi))) | |
| 1840 { | |
| 1841 gimple stmt = gimple_build_goto (label); | |
| 1842 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
| 1843 } | |
| 1844 | |
| 1845 new_label = (tree) *slot; | |
| 1846 stmt = gimple_build_label (new_label); | |
| 1847 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
| 1848 | |
| 1849 *handled_ops_p = true; | |
| 1850 return NULL_TREE; | |
| 1851 } | |
| 1852 | |
| 1853 | |
| 1854 /* Called via walk_function+walk_stmt, rewrite all references to addresses | |
| 1855 of nested functions that require the use of trampolines. The rewrite | |
| 1856 will involve a reference a trampoline generated for the occasion. */ | |
| 1857 | |
| 1858 static tree | |
| 1859 convert_tramp_reference_op (tree *tp, int *walk_subtrees, void *data) | |
| 1860 { | |
| 1861 struct walk_stmt_info *wi = (struct walk_stmt_info *) data; | |
| 1862 struct nesting_info *const info = (struct nesting_info *) wi->info, *i; | |
| 1863 tree t = *tp, decl, target_context, x, builtin; | |
| 1864 gimple call; | |
| 1865 | |
| 1866 *walk_subtrees = 0; | |
| 1867 switch (TREE_CODE (t)) | |
| 1868 { | |
| 1869 case ADDR_EXPR: | |
| 1870 /* Build | |
| 1871 T.1 = &CHAIN->tramp; | |
| 1872 T.2 = __builtin_adjust_trampoline (T.1); | |
| 1873 T.3 = (func_type)T.2; | |
| 1874 */ | |
| 1875 | |
| 1876 decl = TREE_OPERAND (t, 0); | |
| 1877 if (TREE_CODE (decl) != FUNCTION_DECL) | |
| 1878 break; | |
| 1879 | |
| 1880 /* Only need to process nested functions. */ | |
| 1881 target_context = decl_function_context (decl); | |
| 1882 if (!target_context) | |
| 1883 break; | |
| 1884 | |
| 1885 /* If the nested function doesn't use a static chain, then | |
| 1886 it doesn't need a trampoline. */ | |
|
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1887 if (!DECL_STATIC_CHAIN (decl)) |
| 0 | 1888 break; |
| 1889 | |
| 1890 /* If we don't want a trampoline, then don't build one. */ | |
| 1891 if (TREE_NO_TRAMPOLINE (t)) | |
| 1892 break; | |
| 1893 | |
| 1894 /* Lookup the immediate parent of the callee, as that's where | |
| 1895 we need to insert the trampoline. */ | |
| 1896 for (i = info; i->context != target_context; i = i->outer) | |
| 1897 continue; | |
| 1898 x = lookup_tramp_for_decl (i, decl, INSERT); | |
| 1899 | |
| 1900 /* Compute the address of the field holding the trampoline. */ | |
| 1901 x = get_frame_field (info, target_context, x, &wi->gsi); | |
| 1902 x = build_addr (x, target_context); | |
| 1903 x = gsi_gimplify_val (info, x, &wi->gsi); | |
| 1904 | |
| 1905 /* Do machine-specific ugliness. Normally this will involve | |
| 1906 computing extra alignment, but it can really be anything. */ | |
| 1907 builtin = implicit_built_in_decls[BUILT_IN_ADJUST_TRAMPOLINE]; | |
| 1908 call = gimple_build_call (builtin, 1, x); | |
| 1909 x = init_tmp_var_with_call (info, &wi->gsi, call); | |
| 1910 | |
| 1911 /* Cast back to the proper function type. */ | |
| 1912 x = build1 (NOP_EXPR, TREE_TYPE (t), x); | |
| 1913 x = init_tmp_var (info, x, &wi->gsi); | |
| 1914 | |
| 1915 *tp = x; | |
| 1916 break; | |
| 1917 | |
| 1918 default: | |
| 1919 if (!IS_TYPE_OR_DECL_P (t)) | |
| 1920 *walk_subtrees = 1; | |
| 1921 break; | |
| 1922 } | |
| 1923 | |
| 1924 return NULL_TREE; | |
| 1925 } | |
| 1926 | |
| 1927 | |
| 1928 /* Called via walk_function+walk_gimple_stmt, rewrite all references | |
| 1929 to addresses of nested functions that require the use of | |
| 1930 trampolines. The rewrite will involve a reference a trampoline | |
| 1931 generated for the occasion. */ | |
| 1932 | |
| 1933 static tree | |
| 1934 convert_tramp_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1935 struct walk_stmt_info *wi) | |
| 1936 { | |
| 1937 gimple stmt = gsi_stmt (*gsi); | |
| 1938 | |
| 1939 switch (gimple_code (stmt)) | |
| 1940 { | |
| 1941 case GIMPLE_CALL: | |
| 1942 { | |
| 1943 /* Only walk call arguments, lest we generate trampolines for | |
| 1944 direct calls. */ | |
| 1945 unsigned long i, nargs = gimple_call_num_args (stmt); | |
| 1946 for (i = 0; i < nargs; i++) | |
| 1947 walk_tree (gimple_call_arg_ptr (stmt, i), convert_tramp_reference_op, | |
| 1948 wi, NULL); | |
| 1949 | |
| 1950 *handled_ops_p = true; | |
| 1951 return NULL_TREE; | |
| 1952 } | |
| 1953 | |
| 1954 default: | |
| 1955 break; | |
| 1956 } | |
| 1957 | |
| 1958 *handled_ops_p = false; | |
| 1959 return NULL_TREE; | |
| 1960 } | |
| 1961 | |
| 1962 | |
| 1963 | |
| 1964 /* Called via walk_function+walk_gimple_stmt, rewrite all GIMPLE_CALLs | |
| 1965 that reference nested functions to make sure that the static chain | |
| 1966 is set up properly for the call. */ | |
| 1967 | |
| 1968 static tree | |
| 1969 convert_gimple_call (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1970 struct walk_stmt_info *wi) | |
| 1971 { | |
| 1972 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1973 tree decl, target_context; | |
| 1974 char save_static_chain_added; | |
| 1975 int i; | |
| 1976 gimple stmt = gsi_stmt (*gsi); | |
| 1977 | |
| 1978 switch (gimple_code (stmt)) | |
| 1979 { | |
| 1980 case GIMPLE_CALL: | |
|
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1981 if (gimple_call_chain (stmt)) |
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1982 break; |
| 0 | 1983 decl = gimple_call_fndecl (stmt); |
| 1984 if (!decl) | |
| 1985 break; | |
| 1986 target_context = decl_function_context (decl); | |
|
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1987 if (target_context && DECL_STATIC_CHAIN (decl)) |
| 0 | 1988 { |
| 1989 gimple_call_set_chain (stmt, get_static_chain (info, target_context, | |
| 1990 &wi->gsi)); | |
| 1991 info->static_chain_added |= (1 << (info->context != target_context)); | |
| 1992 } | |
| 1993 break; | |
| 1994 | |
| 1995 case GIMPLE_OMP_PARALLEL: | |
| 1996 case GIMPLE_OMP_TASK: | |
| 1997 save_static_chain_added = info->static_chain_added; | |
| 1998 info->static_chain_added = 0; | |
| 1999 walk_body (convert_gimple_call, NULL, info, gimple_omp_body (stmt)); | |
| 2000 for (i = 0; i < 2; i++) | |
| 2001 { | |
| 2002 tree c, decl; | |
| 2003 if ((info->static_chain_added & (1 << i)) == 0) | |
| 2004 continue; | |
| 2005 decl = i ? get_chain_decl (info) : info->frame_decl; | |
| 2006 /* Don't add CHAIN.* or FRAME.* twice. */ | |
| 2007 for (c = gimple_omp_taskreg_clauses (stmt); | |
| 2008 c; | |
| 2009 c = OMP_CLAUSE_CHAIN (c)) | |
| 2010 if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE | |
| 2011 || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED) | |
| 2012 && OMP_CLAUSE_DECL (c) == decl) | |
| 2013 break; | |
| 2014 if (c == NULL) | |
| 2015 { | |
|
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2016 c = build_omp_clause (gimple_location (stmt), |
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2017 i ? OMP_CLAUSE_FIRSTPRIVATE |
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2018 : OMP_CLAUSE_SHARED); |
| 0 | 2019 OMP_CLAUSE_DECL (c) = decl; |
| 2020 OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); | |
| 2021 gimple_omp_taskreg_set_clauses (stmt, c); | |
| 2022 } | |
| 2023 } | |
| 2024 info->static_chain_added |= save_static_chain_added; | |
| 2025 break; | |
| 2026 | |
| 2027 case GIMPLE_OMP_FOR: | |
| 2028 walk_body (convert_gimple_call, NULL, info, | |
| 2029 gimple_omp_for_pre_body (stmt)); | |
| 2030 /* FALLTHRU */ | |
| 2031 case GIMPLE_OMP_SECTIONS: | |
| 2032 case GIMPLE_OMP_SECTION: | |
| 2033 case GIMPLE_OMP_SINGLE: | |
| 2034 case GIMPLE_OMP_MASTER: | |
| 2035 case GIMPLE_OMP_ORDERED: | |
| 2036 case GIMPLE_OMP_CRITICAL: | |
| 2037 walk_body (convert_gimple_call, NULL, info, gimple_omp_body (stmt)); | |
| 2038 break; | |
| 2039 | |
| 2040 default: | |
| 2041 /* Keep looking for other operands. */ | |
| 2042 *handled_ops_p = false; | |
| 2043 return NULL_TREE; | |
| 2044 } | |
| 2045 | |
| 2046 *handled_ops_p = true; | |
| 2047 return NULL_TREE; | |
| 2048 } | |
| 2049 | |
|
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2050 /* Walk the nesting tree starting with ROOT. Convert all trampolines and |
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2051 call expressions. At the same time, determine if a nested function |
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2052 actually uses its static chain; if not, remember that. */ |
| 0 | 2053 |
| 2054 static void | |
| 2055 convert_all_function_calls (struct nesting_info *root) | |
| 2056 { | |
|
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2057 struct nesting_info *n; |
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2058 int iter_count; |
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2059 bool any_changed; |
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2060 |
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2061 /* First, optimistically clear static_chain for all decls that haven't |
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2062 used the static chain already for variable access. */ |
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2063 FOR_EACH_NEST_INFO (n, root) |
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2064 { |
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2065 tree decl = n->context; |
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2066 if (!n->outer || (!n->chain_decl && !n->chain_field)) |
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2067 { |
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2068 DECL_STATIC_CHAIN (decl) = 0; |
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2069 if (dump_file && (dump_flags & TDF_DETAILS)) |
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2070 fprintf (dump_file, "Guessing no static-chain for %s\n", |
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2071 lang_hooks.decl_printable_name (decl, 2)); |
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2072 } |
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2073 else |
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2074 DECL_STATIC_CHAIN (decl) = 1; |
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2075 } |
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2076 |
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2077 /* Walk the functions and perform transformations. Note that these |
|
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2078 transformations can induce new uses of the static chain, which in turn |
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2079 require re-examining all users of the decl. */ |
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2080 /* ??? It would make sense to try to use the call graph to speed this up, |
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2081 but the call graph hasn't really been built yet. Even if it did, we |
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|
2082 would still need to iterate in this loop since address-of references |
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2083 wouldn't show up in the callgraph anyway. */ |
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2084 iter_count = 0; |
| 0 | 2085 do |
| 2086 { | |
|
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2087 any_changed = false; |
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2088 iter_count++; |
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2089 |
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2090 if (dump_file && (dump_flags & TDF_DETAILS)) |
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2091 fputc ('\n', dump_file); |
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2092 |
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2093 FOR_EACH_NEST_INFO (n, root) |
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2094 { |
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2095 tree decl = n->context; |
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2096 bool old_static_chain = DECL_STATIC_CHAIN (decl); |
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2097 |
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2098 walk_function (convert_tramp_reference_stmt, |
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2099 convert_tramp_reference_op, n); |
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2100 walk_function (convert_gimple_call, NULL, n); |
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2101 |
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2102 /* If a call to another function created the use of a chain |
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2103 within this function, we'll have to continue iteration. */ |
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2104 if (!old_static_chain && DECL_STATIC_CHAIN (decl)) |
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2105 any_changed = true; |
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2106 } |
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2107 } |
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2108 while (any_changed); |
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2109 |
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2110 if (dump_file && (dump_flags & TDF_DETAILS)) |
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2111 fprintf (dump_file, "convert_all_function_calls iterations: %d\n\n", |
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2112 iter_count); |
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2113 } |
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2114 |
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2115 struct nesting_copy_body_data |
|
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2116 { |
|
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2117 copy_body_data cb; |
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2118 struct nesting_info *root; |
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2119 }; |
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2120 |
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2121 /* A helper subroutine for debug_var_chain type remapping. */ |
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2122 |
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2123 static tree |
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2124 nesting_copy_decl (tree decl, copy_body_data *id) |
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2125 { |
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2126 struct nesting_copy_body_data *nid = (struct nesting_copy_body_data *) id; |
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2127 void **slot = pointer_map_contains (nid->root->var_map, decl); |
|
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|
2128 |
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changeset
|
2129 if (slot) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2130 return (tree) *slot; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2131 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2132 if (TREE_CODE (decl) == TYPE_DECL && DECL_ORIGINAL_TYPE (decl)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2133 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2134 tree new_decl = copy_decl_no_change (decl, id); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2135 DECL_ORIGINAL_TYPE (new_decl) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2136 = remap_type (DECL_ORIGINAL_TYPE (decl), id); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2137 return new_decl; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2138 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2139 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2140 if (TREE_CODE (decl) == VAR_DECL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2141 || TREE_CODE (decl) == PARM_DECL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2142 || TREE_CODE (decl) == RESULT_DECL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2143 return decl; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2144 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2145 return copy_decl_no_change (decl, id); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2146 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2147 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2148 /* A helper function for remap_vla_decls. See if *TP contains |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2149 some remapped variables. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2150 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2151 static tree |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2152 contains_remapped_vars (tree *tp, int *walk_subtrees, void *data) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2153 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2154 struct nesting_info *root = (struct nesting_info *) data; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2155 tree t = *tp; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2156 void **slot; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2157 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2158 if (DECL_P (t)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2159 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2160 *walk_subtrees = 0; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2161 slot = pointer_map_contains (root->var_map, t); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2162 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2163 if (slot) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2164 return (tree) *slot; |
| 0 | 2165 } |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2166 return NULL; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2167 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2168 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2169 /* Remap VLA decls in BLOCK and subblocks if remapped variables are |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2170 involved. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2171 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2172 static void |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2173 remap_vla_decls (tree block, struct nesting_info *root) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2174 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2175 tree var, subblock, val, type; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2176 struct nesting_copy_body_data id; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2177 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2178 for (subblock = BLOCK_SUBBLOCKS (block); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2179 subblock; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2180 subblock = BLOCK_CHAIN (subblock)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2181 remap_vla_decls (subblock, root); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2182 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2183 for (var = BLOCK_VARS (block); var; var = TREE_CHAIN (var)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2184 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2185 if (TREE_CODE (var) == VAR_DECL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2186 && variably_modified_type_p (TREE_TYPE (var), NULL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2187 && DECL_HAS_VALUE_EXPR_P (var)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2188 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2189 type = TREE_TYPE (var); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2190 val = DECL_VALUE_EXPR (var); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2191 if (walk_tree (&type, contains_remapped_vars, root, NULL) != NULL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2192 || walk_tree (&val, contains_remapped_vars, root, NULL) != NULL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2193 break; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2194 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2195 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2196 if (var == NULL_TREE) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2197 return; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2198 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2199 memset (&id, 0, sizeof (id)); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2200 id.cb.copy_decl = nesting_copy_decl; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2201 id.cb.decl_map = pointer_map_create (); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2202 id.root = root; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2203 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2204 for (; var; var = TREE_CHAIN (var)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2205 if (TREE_CODE (var) == VAR_DECL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2206 && variably_modified_type_p (TREE_TYPE (var), NULL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2207 && DECL_HAS_VALUE_EXPR_P (var)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2208 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2209 struct nesting_info *i; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2210 tree newt, t, context; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2211 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2212 t = type = TREE_TYPE (var); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2213 val = DECL_VALUE_EXPR (var); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2214 if (walk_tree (&type, contains_remapped_vars, root, NULL) == NULL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2215 && walk_tree (&val, contains_remapped_vars, root, NULL) == NULL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2216 continue; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2217 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2218 context = decl_function_context (var); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2219 for (i = root; i; i = i->outer) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2220 if (i->context == context) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2221 break; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2222 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2223 if (i == NULL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2224 continue; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2225 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2226 id.cb.src_fn = i->context; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2227 id.cb.dst_fn = i->context; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2228 id.cb.src_cfun = DECL_STRUCT_FUNCTION (root->context); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2229 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2230 TREE_TYPE (var) = newt = remap_type (type, &id.cb); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2231 while (POINTER_TYPE_P (newt) && !TYPE_NAME (newt)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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|
2232 { |
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2233 newt = TREE_TYPE (newt); |
|
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|
2234 t = TREE_TYPE (t); |
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2235 } |
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|
2236 if (TYPE_NAME (newt) |
|
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2237 && TREE_CODE (TYPE_NAME (newt)) == TYPE_DECL |
|
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|
2238 && DECL_ORIGINAL_TYPE (TYPE_NAME (newt)) |
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|
2239 && newt != t |
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|
2240 && TYPE_NAME (newt) == TYPE_NAME (t)) |
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|
2241 TYPE_NAME (newt) = remap_decl (TYPE_NAME (newt), &id.cb); |
|
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|
2242 |
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|
2243 walk_tree (&val, copy_tree_body_r, &id.cb, NULL); |
|
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|
2244 if (val != DECL_VALUE_EXPR (var)) |
|
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|
2245 SET_DECL_VALUE_EXPR (var, val); |
|
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2246 } |
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2247 |
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|
2248 pointer_map_destroy (id.cb.decl_map); |
| 0 | 2249 } |
| 2250 | |
| 2251 /* Do "everything else" to clean up or complete state collected by the | |
| 2252 various walking passes -- lay out the types and decls, generate code | |
| 2253 to initialize the frame decl, store critical expressions in the | |
| 2254 struct function for rtl to find. */ | |
| 2255 | |
| 2256 static void | |
| 2257 finalize_nesting_tree_1 (struct nesting_info *root) | |
| 2258 { | |
| 2259 gimple_seq stmt_list; | |
| 2260 gimple stmt; | |
| 2261 tree context = root->context; | |
| 2262 struct function *sf; | |
| 2263 | |
| 2264 stmt_list = NULL; | |
| 2265 | |
| 2266 /* If we created a non-local frame type or decl, we need to lay them | |
| 2267 out at this time. */ | |
| 2268 if (root->frame_type) | |
| 2269 { | |
| 2270 /* In some cases the frame type will trigger the -Wpadded warning. | |
| 2271 This is not helpful; suppress it. */ | |
| 2272 int save_warn_padded = warn_padded; | |
|
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|
2273 tree *adjust; |
|
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|
2274 |
| 0 | 2275 warn_padded = 0; |
| 2276 layout_type (root->frame_type); | |
| 2277 warn_padded = save_warn_padded; | |
| 2278 layout_decl (root->frame_decl, 0); | |
|
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|
2279 |
|
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|
2280 /* Remove root->frame_decl from root->new_local_var_chain, so |
|
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|
2281 that we can declare it also in the lexical blocks, which |
|
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|
2282 helps ensure virtual regs that end up appearing in its RTL |
|
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|
2283 expression get substituted in instantiate_virtual_regs(). */ |
|
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|
2284 for (adjust = &root->new_local_var_chain; |
|
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|
2285 *adjust != root->frame_decl; |
|
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|
2286 adjust = &TREE_CHAIN (*adjust)) |
|
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|
2287 gcc_assert (TREE_CHAIN (*adjust)); |
|
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|
2288 *adjust = TREE_CHAIN (*adjust); |
|
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|
2289 |
|
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|
2290 TREE_CHAIN (root->frame_decl) = NULL_TREE; |
|
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|
2291 declare_vars (root->frame_decl, |
|
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|
2292 gimple_seq_first_stmt (gimple_body (context)), true); |
| 0 | 2293 } |
| 2294 | |
|
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|
2295 /* If any parameters were referenced non-locally, then we need to |
| 0 | 2296 insert a copy. Likewise, if any variables were referenced by |
| 2297 pointer, we need to initialize the address. */ | |
| 2298 if (root->any_parm_remapped) | |
| 2299 { | |
| 2300 tree p; | |
| 2301 for (p = DECL_ARGUMENTS (context); p ; p = TREE_CHAIN (p)) | |
| 2302 { | |
| 2303 tree field, x, y; | |
| 2304 | |
| 2305 field = lookup_field_for_decl (root, p, NO_INSERT); | |
| 2306 if (!field) | |
| 2307 continue; | |
| 2308 | |
| 2309 if (use_pointer_in_frame (p)) | |
| 2310 x = build_addr (p, context); | |
| 2311 else | |
| 2312 x = p; | |
| 2313 | |
| 2314 y = build3 (COMPONENT_REF, TREE_TYPE (field), | |
| 2315 root->frame_decl, field, NULL_TREE); | |
| 2316 stmt = gimple_build_assign (y, x); | |
| 2317 gimple_seq_add_stmt (&stmt_list, stmt); | |
| 2318 /* If the assignment is from a non-register the stmt is | |
| 2319 not valid gimple. Make it so by using a temporary instead. */ | |
| 2320 if (!is_gimple_reg (x) | |
| 2321 && is_gimple_reg_type (TREE_TYPE (x))) | |
| 2322 { | |
| 2323 gimple_stmt_iterator gsi = gsi_last (stmt_list); | |
| 2324 x = init_tmp_var (root, x, &gsi); | |
| 2325 gimple_assign_set_rhs1 (stmt, x); | |
| 2326 } | |
| 2327 } | |
| 2328 } | |
| 2329 | |
| 2330 /* If a chain_field was created, then it needs to be initialized | |
| 2331 from chain_decl. */ | |
| 2332 if (root->chain_field) | |
| 2333 { | |
| 2334 tree x = build3 (COMPONENT_REF, TREE_TYPE (root->chain_field), | |
| 2335 root->frame_decl, root->chain_field, NULL_TREE); | |
| 2336 stmt = gimple_build_assign (x, get_chain_decl (root)); | |
| 2337 gimple_seq_add_stmt (&stmt_list, stmt); | |
| 2338 } | |
| 2339 | |
| 2340 /* If trampolines were created, then we need to initialize them. */ | |
| 2341 if (root->any_tramp_created) | |
| 2342 { | |
| 2343 struct nesting_info *i; | |
| 2344 for (i = root->inner; i ; i = i->next) | |
| 2345 { | |
| 2346 tree arg1, arg2, arg3, x, field; | |
| 2347 | |
| 2348 field = lookup_tramp_for_decl (root, i->context, NO_INSERT); | |
| 2349 if (!field) | |
| 2350 continue; | |
| 2351 | |
|
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|
2352 gcc_assert (DECL_STATIC_CHAIN (i->context)); |
|
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|
2353 arg3 = build_addr (root->frame_decl, context); |
| 0 | 2354 |
| 2355 arg2 = build_addr (i->context, context); | |
| 2356 | |
| 2357 x = build3 (COMPONENT_REF, TREE_TYPE (field), | |
| 2358 root->frame_decl, field, NULL_TREE); | |
| 2359 arg1 = build_addr (x, context); | |
| 2360 | |
| 2361 x = implicit_built_in_decls[BUILT_IN_INIT_TRAMPOLINE]; | |
| 2362 stmt = gimple_build_call (x, 3, arg1, arg2, arg3); | |
| 2363 gimple_seq_add_stmt (&stmt_list, stmt); | |
| 2364 } | |
| 2365 } | |
| 2366 | |
| 2367 /* If we created initialization statements, insert them. */ | |
| 2368 if (stmt_list) | |
| 2369 { | |
| 2370 gimple bind; | |
| 2371 annotate_all_with_location (stmt_list, DECL_SOURCE_LOCATION (context)); | |
| 2372 bind = gimple_seq_first_stmt (gimple_body (context)); | |
| 2373 gimple_seq_add_seq (&stmt_list, gimple_bind_body (bind)); | |
| 2374 gimple_bind_set_body (bind, stmt_list); | |
| 2375 } | |
| 2376 | |
| 2377 /* If a chain_decl was created, then it needs to be registered with | |
| 2378 struct function so that it gets initialized from the static chain | |
| 2379 register at the beginning of the function. */ | |
| 2380 sf = DECL_STRUCT_FUNCTION (root->context); | |
| 2381 sf->static_chain_decl = root->chain_decl; | |
| 2382 | |
| 2383 /* Similarly for the non-local goto save area. */ | |
| 2384 if (root->nl_goto_field) | |
| 2385 { | |
| 2386 sf->nonlocal_goto_save_area | |
| 2387 = get_frame_field (root, context, root->nl_goto_field, NULL); | |
| 2388 sf->has_nonlocal_label = 1; | |
| 2389 } | |
| 2390 | |
| 2391 /* Make sure all new local variables get inserted into the | |
| 2392 proper BIND_EXPR. */ | |
| 2393 if (root->new_local_var_chain) | |
| 2394 declare_vars (root->new_local_var_chain, | |
| 2395 gimple_seq_first_stmt (gimple_body (root->context)), | |
| 2396 false); | |
|
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|
2397 |
| 0 | 2398 if (root->debug_var_chain) |
|
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|
2399 { |
|
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|
2400 tree debug_var; |
|
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|
2401 gimple scope; |
|
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|
2402 |
|
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|
2403 remap_vla_decls (DECL_INITIAL (root->context), root); |
|
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|
2404 |
|
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|
2405 for (debug_var = root->debug_var_chain; debug_var; |
|
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|
2406 debug_var = TREE_CHAIN (debug_var)) |
|
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|
2407 if (variably_modified_type_p (TREE_TYPE (debug_var), NULL)) |
|
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changeset
|
2408 break; |
|
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|
2409 |
|
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|
2410 /* If there are any debug decls with variable length types, |
|
77e2b8dfacca
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|
2411 remap those types using other debug_var_chain variables. */ |
|
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|
2412 if (debug_var) |
|
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|
2413 { |
|
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|
2414 struct nesting_copy_body_data id; |
|
77e2b8dfacca
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|
2415 |
|
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|
2416 memset (&id, 0, sizeof (id)); |
|
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|
2417 id.cb.copy_decl = nesting_copy_decl; |
|
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|
2418 id.cb.decl_map = pointer_map_create (); |
|
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|
2419 id.root = root; |
|
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|
2420 |
|
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|
2421 for (; debug_var; debug_var = TREE_CHAIN (debug_var)) |
|
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|
2422 if (variably_modified_type_p (TREE_TYPE (debug_var), NULL)) |
|
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|
2423 { |
|
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|
2424 tree type = TREE_TYPE (debug_var); |
|
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|
2425 tree newt, t = type; |
|
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|
2426 struct nesting_info *i; |
|
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|
2427 |
|
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|
2428 for (i = root; i; i = i->outer) |
|
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|
2429 if (variably_modified_type_p (type, i->context)) |
|
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|
2430 break; |
|
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|
2431 |
|
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|
2432 if (i == NULL) |
|
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|
2433 continue; |
|
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|
2434 |
|
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|
2435 id.cb.src_fn = i->context; |
|
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|
2436 id.cb.dst_fn = i->context; |
|
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|
2437 id.cb.src_cfun = DECL_STRUCT_FUNCTION (root->context); |
|
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|
2438 |
|
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|
2439 TREE_TYPE (debug_var) = newt = remap_type (type, &id.cb); |
|
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|
2440 while (POINTER_TYPE_P (newt) && !TYPE_NAME (newt)) |
|
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|
2441 { |
|
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|
2442 newt = TREE_TYPE (newt); |
|
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|
2443 t = TREE_TYPE (t); |
|
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|
2444 } |
|
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|
2445 if (TYPE_NAME (newt) |
|
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|
2446 && TREE_CODE (TYPE_NAME (newt)) == TYPE_DECL |
|
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|
2447 && DECL_ORIGINAL_TYPE (TYPE_NAME (newt)) |
|
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|
2448 && newt != t |
|
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|
2449 && TYPE_NAME (newt) == TYPE_NAME (t)) |
|
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|
2450 TYPE_NAME (newt) = remap_decl (TYPE_NAME (newt), &id.cb); |
|
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|
2451 } |
|
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|
2452 |
|
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|
2453 pointer_map_destroy (id.cb.decl_map); |
|
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|
2454 } |
|
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|
2455 |
|
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|
2456 scope = gimple_seq_first_stmt (gimple_body (root->context)); |
|
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|
2457 if (gimple_bind_block (scope)) |
|
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|
2458 declare_vars (root->debug_var_chain, scope, true); |
|
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|
2459 else |
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|
2460 BLOCK_VARS (DECL_INITIAL (root->context)) |
|
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|
2461 = chainon (BLOCK_VARS (DECL_INITIAL (root->context)), |
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|
2462 root->debug_var_chain); |
|
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|
2463 } |
| 0 | 2464 |
| 2465 /* Dump the translated tree function. */ | |
|
55
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|
2466 if (dump_file) |
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|
2467 { |
|
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|
2468 fputs ("\n\n", dump_file); |
|
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|
2469 dump_function_to_file (root->context, dump_file, dump_flags); |
|
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|
2470 } |
| 0 | 2471 } |
| 2472 | |
| 2473 static void | |
| 2474 finalize_nesting_tree (struct nesting_info *root) | |
| 2475 { | |
|
55
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|
2476 struct nesting_info *n; |
|
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|
2477 FOR_EACH_NEST_INFO (n, root) |
|
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|
2478 finalize_nesting_tree_1 (n); |
| 0 | 2479 } |
| 2480 | |
| 2481 /* Unnest the nodes and pass them to cgraph. */ | |
| 2482 | |
| 2483 static void | |
| 2484 unnest_nesting_tree_1 (struct nesting_info *root) | |
| 2485 { | |
| 2486 struct cgraph_node *node = cgraph_node (root->context); | |
| 2487 | |
| 2488 /* For nested functions update the cgraph to reflect unnesting. | |
| 2489 We also delay finalizing of these functions up to this point. */ | |
| 2490 if (node->origin) | |
| 2491 { | |
| 2492 cgraph_unnest_node (cgraph_node (root->context)); | |
| 2493 cgraph_finalize_function (root->context, true); | |
| 2494 } | |
| 2495 } | |
| 2496 | |
| 2497 static void | |
| 2498 unnest_nesting_tree (struct nesting_info *root) | |
| 2499 { | |
|
55
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|
2500 struct nesting_info *n; |
|
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|
2501 FOR_EACH_NEST_INFO (n, root) |
|
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|
2502 unnest_nesting_tree_1 (n); |
| 0 | 2503 } |
| 2504 | |
| 2505 /* Free the data structures allocated during this pass. */ | |
| 2506 | |
| 2507 static void | |
| 2508 free_nesting_tree (struct nesting_info *root) | |
| 2509 { | |
|
55
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changeset
|
2510 struct nesting_info *node, *next; |
|
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|
2511 |
|
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|
2512 node = iter_nestinfo_start (root); |
| 0 | 2513 do |
| 2514 { | |
|
55
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changeset
|
2515 next = iter_nestinfo_next (node); |
|
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changeset
|
2516 pointer_map_destroy (node->var_map); |
|
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|
2517 pointer_map_destroy (node->field_map); |
|
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|
2518 free (node); |
|
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|
2519 node = next; |
| 0 | 2520 } |
|
55
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changeset
|
2521 while (node); |
|
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|
2522 } |
|
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|
2523 |
|
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changeset
|
2524 /* Gimplify a function and all its nested functions. */ |
|
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diff
changeset
|
2525 static void |
|
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|
2526 gimplify_all_functions (struct cgraph_node *root) |
|
77e2b8dfacca
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diff
changeset
|
2527 { |
|
77e2b8dfacca
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diff
changeset
|
2528 struct cgraph_node *iter; |
|
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diff
changeset
|
2529 if (!gimple_body (root->decl)) |
|
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|
2530 gimplify_function_tree (root->decl); |
|
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diff
changeset
|
2531 for (iter = root->nested; iter; iter = iter->next_nested) |
|
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diff
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|
2532 gimplify_all_functions (iter); |
| 0 | 2533 } |
| 2534 | |
| 2535 /* Main entry point for this pass. Process FNDECL and all of its nested | |
| 2536 subroutines and turn them into something less tightly bound. */ | |
| 2537 | |
| 2538 void | |
| 2539 lower_nested_functions (tree fndecl) | |
| 2540 { | |
| 2541 struct cgraph_node *cgn; | |
| 2542 struct nesting_info *root; | |
| 2543 | |
| 2544 /* If there are no nested functions, there's nothing to do. */ | |
| 2545 cgn = cgraph_node (fndecl); | |
| 2546 if (!cgn->nested) | |
| 2547 return; | |
| 2548 | |
|
55
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diff
changeset
|
2549 gimplify_all_functions (cgn); |
|
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changeset
|
2550 |
|
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diff
changeset
|
2551 dump_file = dump_begin (TDI_nested, &dump_flags); |
|
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diff
changeset
|
2552 if (dump_file) |
|
77e2b8dfacca
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diff
changeset
|
2553 fprintf (dump_file, "\n;; Function %s\n\n", |
|
77e2b8dfacca
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diff
changeset
|
2554 lang_hooks.decl_printable_name (fndecl, 2)); |
|
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diff
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|
2555 |
| 0 | 2556 bitmap_obstack_initialize (&nesting_info_bitmap_obstack); |
| 2557 root = create_nesting_tree (cgn); | |
|
55
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|
2558 |
| 0 | 2559 walk_all_functions (convert_nonlocal_reference_stmt, |
| 2560 convert_nonlocal_reference_op, | |
| 2561 root); | |
| 2562 walk_all_functions (convert_local_reference_stmt, | |
| 2563 convert_local_reference_op, | |
| 2564 root); | |
| 2565 walk_all_functions (convert_nl_goto_reference, NULL, root); | |
| 2566 walk_all_functions (convert_nl_goto_receiver, NULL, root); | |
|
55
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|
2567 |
| 0 | 2568 convert_all_function_calls (root); |
| 2569 finalize_nesting_tree (root); | |
| 2570 unnest_nesting_tree (root); | |
|
55
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|
2571 |
| 0 | 2572 free_nesting_tree (root); |
| 2573 bitmap_obstack_release (&nesting_info_bitmap_obstack); | |
|
55
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changeset
|
2574 |
|
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diff
changeset
|
2575 if (dump_file) |
|
77e2b8dfacca
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changeset
|
2576 { |
|
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diff
changeset
|
2577 dump_end (TDI_nested, dump_file); |
|
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diff
changeset
|
2578 dump_file = NULL; |
|
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changeset
|
2579 } |
| 0 | 2580 } |
| 2581 | |
| 2582 #include "gt-tree-nested.h" |