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46e8c075 | 1 | /* Perform optimizations on tree structure. |
1f84ec23 | 2 | Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
46e8c075 MM |
3 | Written by Mark Michell (mark@codesourcery.com). |
4 | ||
06ceef4e | 5 | This file is part of GNU CC. |
46e8c075 | 6 | |
06ceef4e RK |
7 | GNU CC is free software; you can redistribute it and/or modify it |
8 | under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | General Public License for more details. | |
9c96f3f8 | 16 | |
06ceef4e RK |
17 | You should have received a copy of the GNU General Public License |
18 | along with GNU CC; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
46e8c075 MM |
21 | |
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "tree.h" | |
25 | #include "cp-tree.h" | |
26 | #include "rtl.h" | |
27 | #include "insn-config.h" | |
574a0ef5 | 28 | #include "input.h" |
46e8c075 | 29 | #include "integrate.h" |
9c96f3f8 | 30 | #include "toplev.h" |
46e8c075 | 31 | #include "varray.h" |
b3bae5e2 | 32 | #include "ggc.h" |
46e8c075 MM |
33 | |
34 | /* To Do: | |
35 | ||
46e8c075 MM |
36 | o In order to make inlining-on-trees work, we pessimized |
37 | function-local static constants. In particular, they are now | |
38 | always output, even when not addressed. Fix this by treating | |
39 | function-local static constants just like global static | |
40 | constants; the back-end already knows not to output them if they | |
41 | are not needed. | |
9c96f3f8 | 42 | |
46e8c075 | 43 | o Provide heuristics to clamp inlining of recursive template |
3431f196 | 44 | calls? */ |
390f4e9a | 45 | |
46e8c075 MM |
46 | /* Data required for function inlining. */ |
47 | ||
48 | typedef struct inline_data | |
49 | { | |
50 | /* A stack of the functions we are inlining. For example, if we are | |
51 | compiling `f', which calls `g', which calls `h', and we are | |
52 | inlining the body of `h', the stack will contain, `h', followed | |
53 | by `g', followed by `f'. */ | |
54 | varray_type fns; | |
db9b2174 MM |
55 | /* The label to jump to when a return statement is encountered. If |
56 | this value is NULL, then return statements will simply be | |
57 | remapped as return statements, rather than as jumps. */ | |
46e8c075 MM |
58 | tree ret_label; |
59 | /* The map from local declarations in the inlined function to | |
60 | equivalents in the function into which it is being inlined. */ | |
61 | splay_tree decl_map; | |
390f4e9a MM |
62 | /* Nonzero if we are currently within the cleanup for a |
63 | TARGET_EXPR. */ | |
64 | int in_target_cleanup_p; | |
738e2810 MM |
65 | /* A stack of the TARGET_EXPRs that we are currently processing. */ |
66 | varray_type target_exprs; | |
b3bae5e2 JJ |
67 | /* A list of the functions current function has inlined. */ |
68 | varray_type inlined_fns; | |
46e8c075 MM |
69 | } inline_data; |
70 | ||
71 | /* Prototypes. */ | |
72 | ||
158991b7 KG |
73 | static tree initialize_inlined_parameters PARAMS ((inline_data *, tree, tree)); |
74 | static tree declare_return_variable PARAMS ((inline_data *, tree *)); | |
75 | static tree copy_body_r PARAMS ((tree *, int *, void *)); | |
76 | static tree copy_body PARAMS ((inline_data *)); | |
77 | static tree expand_call_inline PARAMS ((tree *, int *, void *)); | |
78 | static void expand_calls_inline PARAMS ((tree *, inline_data *)); | |
79 | static int inlinable_function_p PARAMS ((tree, inline_data *)); | |
80 | static tree remap_decl PARAMS ((tree, inline_data *)); | |
81 | static void remap_block PARAMS ((tree, tree, inline_data *)); | |
82 | static void copy_scope_stmt PARAMS ((tree *, int *, inline_data *)); | |
83 | static tree calls_setjmp_r PARAMS ((tree *, int *, void *)); | |
390f4e9a MM |
84 | |
85 | /* Remap DECL during the copying of the BLOCK tree for the function. | |
86 | DATA is really an `inline_data *'. */ | |
87 | ||
88 | static tree | |
89 | remap_decl (decl, id) | |
90 | tree decl; | |
91 | inline_data *id; | |
92 | { | |
93 | splay_tree_node n; | |
94 | tree fn; | |
95 | ||
96 | /* We only remap local variables in the current function. */ | |
97 | fn = VARRAY_TOP_TREE (id->fns); | |
98 | if (!nonstatic_local_decl_p (decl) || DECL_CONTEXT (decl) != fn) | |
99 | return NULL_TREE; | |
100 | ||
101 | /* See if we have remapped this declaration. */ | |
102 | n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl); | |
103 | /* If we didn't already have an equivalent for this declaration, | |
104 | create one now. */ | |
105 | if (!n) | |
106 | { | |
107 | tree t; | |
9c96f3f8 | 108 | |
390f4e9a | 109 | /* Make a copy of the variable or label. */ |
9c96f3f8 | 110 | t = copy_decl_for_inlining (decl, fn, |
390f4e9a | 111 | VARRAY_TREE (id->fns, 0)); |
aa1eac0c JW |
112 | |
113 | /* The decl T could be a dynamic array or other variable size type, | |
114 | in which case some fields need to be remapped because they may | |
115 | contain SAVE_EXPRs. */ | |
ee94fce6 MM |
116 | walk_tree (&DECL_SIZE (t), copy_body_r, id, NULL); |
117 | walk_tree (&DECL_SIZE_UNIT (t), copy_body_r, id, NULL); | |
aa1eac0c JW |
118 | if (TREE_TYPE (t) && TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE |
119 | && TYPE_DOMAIN (TREE_TYPE (t))) | |
cba6a0b2 MM |
120 | { |
121 | TREE_TYPE (t) = copy_node (TREE_TYPE (t)); | |
9c96f3f8 | 122 | TYPE_DOMAIN (TREE_TYPE (t)) |
cba6a0b2 MM |
123 | = copy_node (TYPE_DOMAIN (TREE_TYPE (t))); |
124 | walk_tree (&TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (t))), | |
ee94fce6 | 125 | copy_body_r, id, NULL); |
cba6a0b2 | 126 | } |
aa1eac0c | 127 | |
390f4e9a MM |
128 | /* Remember it, so that if we encounter this local entity |
129 | again we can reuse this copy. */ | |
9c96f3f8 AJ |
130 | n = splay_tree_insert (id->decl_map, |
131 | (splay_tree_key) decl, | |
390f4e9a MM |
132 | (splay_tree_value) t); |
133 | } | |
9c96f3f8 | 134 | |
390f4e9a MM |
135 | return (tree) n->value; |
136 | } | |
137 | ||
138 | /* Copy the SCOPE_STMT_BLOCK associated with SCOPE_STMT to contain | |
139 | remapped versions of the variables therein. And hook the new block | |
140 | into the block-tree. If non-NULL, the DECLS are declarations to | |
141 | add to use instead of the BLOCK_VARS in the old block. */ | |
142 | ||
143 | static void | |
144 | remap_block (scope_stmt, decls, id) | |
145 | tree scope_stmt; | |
146 | tree decls; | |
147 | inline_data *id; | |
148 | { | |
149 | /* We cannot do this in the cleanup for a TARGET_EXPR since we do | |
150 | not know whether or not expand_expr will actually write out the | |
151 | code we put there. If it does not, then we'll have more BLOCKs | |
152 | than block-notes, and things will go awry. At some point, we | |
153 | should make the back-end handle BLOCK notes in a tidier way, | |
154 | without requiring a strict correspondence to the block-tree; then | |
155 | this check can go. */ | |
156 | if (id->in_target_cleanup_p) | |
157 | { | |
158 | SCOPE_STMT_BLOCK (scope_stmt) = NULL_TREE; | |
159 | return; | |
160 | } | |
161 | ||
162 | /* If this is the beginning of a scope, remap the associated BLOCK. */ | |
163 | if (SCOPE_BEGIN_P (scope_stmt) && SCOPE_STMT_BLOCK (scope_stmt)) | |
164 | { | |
165 | tree old_block; | |
166 | tree new_block; | |
167 | tree old_var; | |
a97901e6 | 168 | tree fn; |
390f4e9a MM |
169 | |
170 | /* Make the new block. */ | |
171 | old_block = SCOPE_STMT_BLOCK (scope_stmt); | |
172 | new_block = make_node (BLOCK); | |
173 | TREE_USED (new_block) = TREE_USED (old_block); | |
174 | BLOCK_ABSTRACT_ORIGIN (new_block) = old_block; | |
175 | SCOPE_STMT_BLOCK (scope_stmt) = new_block; | |
176 | ||
177 | /* Remap its variables. */ | |
9c96f3f8 AJ |
178 | for (old_var = decls ? decls : BLOCK_VARS (old_block); |
179 | old_var; | |
390f4e9a MM |
180 | old_var = TREE_CHAIN (old_var)) |
181 | { | |
182 | tree new_var; | |
183 | ||
184 | /* Remap the variable. */ | |
185 | new_var = remap_decl (old_var, id); | |
db9b2174 MM |
186 | /* If we didn't remap this variable, so we can't mess with |
187 | its TREE_CHAIN. If we remapped this variable to | |
188 | something other than a declaration (say, if we mapped it | |
189 | to a constant), then we must similarly omit any mention | |
190 | of it here. */ | |
191 | if (!new_var || !DECL_P (new_var)) | |
390f4e9a MM |
192 | ; |
193 | else | |
194 | { | |
195 | TREE_CHAIN (new_var) = BLOCK_VARS (new_block); | |
196 | BLOCK_VARS (new_block) = new_var; | |
197 | } | |
198 | } | |
199 | /* We put the BLOCK_VARS in reverse order; fix that now. */ | |
200 | BLOCK_VARS (new_block) = nreverse (BLOCK_VARS (new_block)); | |
a97901e6 | 201 | fn = VARRAY_TREE (id->fns, 0); |
a901fa64 JM |
202 | if (fn == current_function_decl) |
203 | /* We're building a clone; DECL_INITIAL is still error_mark_node, and | |
204 | current_binding_level is the parm binding level. */ | |
205 | insert_block (new_block); | |
db9b2174 | 206 | else |
a901fa64 JM |
207 | { |
208 | /* Attach this new block after the DECL_INITIAL block for the | |
209 | function into which this block is being inlined. In | |
210 | rest_of_compilation we will straighten out the BLOCK tree. */ | |
211 | tree *first_block; | |
212 | if (DECL_INITIAL (fn)) | |
213 | first_block = &BLOCK_CHAIN (DECL_INITIAL (fn)); | |
214 | else | |
215 | first_block = &DECL_INITIAL (fn); | |
216 | BLOCK_CHAIN (new_block) = *first_block; | |
217 | *first_block = new_block; | |
218 | } | |
390f4e9a MM |
219 | /* Remember the remapped block. */ |
220 | splay_tree_insert (id->decl_map, | |
221 | (splay_tree_key) old_block, | |
222 | (splay_tree_value) new_block); | |
223 | } | |
224 | /* If this is the end of a scope, set the SCOPE_STMT_BLOCK to be the | |
225 | remapped block. */ | |
226 | else if (SCOPE_END_P (scope_stmt) && SCOPE_STMT_BLOCK (scope_stmt)) | |
227 | { | |
228 | splay_tree_node n; | |
229 | ||
230 | /* Find this block in the table of remapped things. */ | |
9c96f3f8 | 231 | n = splay_tree_lookup (id->decl_map, |
390f4e9a MM |
232 | (splay_tree_key) SCOPE_STMT_BLOCK (scope_stmt)); |
233 | my_friendly_assert (n != NULL, 19991203); | |
234 | SCOPE_STMT_BLOCK (scope_stmt) = (tree) n->value; | |
390f4e9a MM |
235 | } |
236 | } | |
237 | ||
238 | /* Copy the SCOPE_STMT pointed to by TP. */ | |
239 | ||
240 | static void | |
241 | copy_scope_stmt (tp, walk_subtrees, id) | |
242 | tree *tp; | |
243 | int *walk_subtrees; | |
244 | inline_data *id; | |
245 | { | |
246 | tree block; | |
247 | ||
248 | /* Remember whether or not this statement was nullified. When | |
249 | making a copy, copy_tree_r always sets SCOPE_NULLIFIED_P (and | |
250 | doesn't copy the SCOPE_STMT_BLOCK) to free callers from having to | |
251 | deal with copying BLOCKs if they do not wish to do so. */ | |
252 | block = SCOPE_STMT_BLOCK (*tp); | |
253 | /* Copy (and replace) the statement. */ | |
254 | copy_tree_r (tp, walk_subtrees, NULL); | |
255 | /* Restore the SCOPE_STMT_BLOCK. */ | |
256 | SCOPE_STMT_BLOCK (*tp) = block; | |
257 | ||
258 | /* Remap the associated block. */ | |
259 | remap_block (*tp, NULL_TREE, id); | |
260 | } | |
46e8c075 MM |
261 | |
262 | /* Called from copy_body via walk_tree. DATA is really an | |
263 | `inline_data *'. */ | |
264 | ||
265 | static tree | |
266 | copy_body_r (tp, walk_subtrees, data) | |
267 | tree *tp; | |
268 | int *walk_subtrees; | |
269 | void *data; | |
270 | { | |
271 | inline_data* id; | |
272 | tree fn; | |
273 | ||
274 | /* Set up. */ | |
275 | id = (inline_data *) data; | |
390f4e9a | 276 | fn = VARRAY_TOP_TREE (id->fns); |
46e8c075 MM |
277 | |
278 | /* All automatic variables should have a DECL_CONTEXT indicating | |
279 | what function they come from. */ | |
280 | if ((TREE_CODE (*tp) == VAR_DECL || TREE_CODE (*tp) == LABEL_DECL) | |
281 | && DECL_NAMESPACE_SCOPE_P (*tp)) | |
282 | my_friendly_assert (DECL_EXTERNAL (*tp) || TREE_STATIC (*tp), | |
283 | 19991113); | |
284 | ||
285 | /* If this is a RETURN_STMT, change it into an EXPR_STMT and a | |
286 | GOTO_STMT with the RET_LABEL as its target. */ | |
db9b2174 | 287 | if (TREE_CODE (*tp) == RETURN_STMT && id->ret_label) |
46e8c075 MM |
288 | { |
289 | tree return_stmt = *tp; | |
290 | tree goto_stmt; | |
291 | ||
292 | /* Build the GOTO_STMT. */ | |
0dfdeca6 | 293 | goto_stmt = build_stmt (GOTO_STMT, id->ret_label); |
46e8c075 MM |
294 | TREE_CHAIN (goto_stmt) = TREE_CHAIN (return_stmt); |
295 | ||
296 | /* If we're returning something, just turn that into an | |
9c96f3f8 | 297 | assignment into the equivalent of the original |
46e8c075 MM |
298 | RESULT_DECL. */ |
299 | if (RETURN_EXPR (return_stmt)) | |
300 | { | |
9c96f3f8 | 301 | *tp = build_stmt (EXPR_STMT, |
0dfdeca6 | 302 | RETURN_EXPR (return_stmt)); |
5eec2847 | 303 | STMT_IS_FULL_EXPR_P (*tp) = 1; |
46e8c075 MM |
304 | /* And then jump to the end of the function. */ |
305 | TREE_CHAIN (*tp) = goto_stmt; | |
306 | } | |
307 | /* If we're not returning anything just do the jump. */ | |
308 | else | |
309 | *tp = goto_stmt; | |
310 | } | |
311 | /* Local variables and labels need to be replaced by equivalent | |
312 | variables. We don't want to copy static variables; there's only | |
313 | one of those, no matter how many times we inline the containing | |
314 | function. */ | |
315 | else if (nonstatic_local_decl_p (*tp) && DECL_CONTEXT (*tp) == fn) | |
316 | { | |
390f4e9a | 317 | tree new_decl; |
46e8c075 | 318 | |
390f4e9a MM |
319 | /* Remap the declaration. */ |
320 | new_decl = remap_decl (*tp, id); | |
321 | my_friendly_assert (new_decl != NULL_TREE, 19991203); | |
46e8c075 | 322 | /* Replace this variable with the copy. */ |
27c58e25 | 323 | STRIP_TYPE_NOPS (new_decl); |
390f4e9a | 324 | *tp = new_decl; |
46e8c075 | 325 | } |
9c96f3f8 | 326 | else if (nonstatic_local_decl_p (*tp) |
ef97bf6b MM |
327 | && DECL_CONTEXT (*tp) != VARRAY_TREE (id->fns, 0)) |
328 | my_friendly_abort (0); | |
46e8c075 | 329 | else if (TREE_CODE (*tp) == SAVE_EXPR) |
9c96f3f8 | 330 | remap_save_expr (tp, id->decl_map, VARRAY_TREE (id->fns, 0), |
d7d5e42f | 331 | walk_subtrees); |
46e8c075 | 332 | else if (TREE_CODE (*tp) == UNSAVE_EXPR) |
da4ac6f8 | 333 | /* UNSAVE_EXPRs should not be generated until expansion time. */ |
46e8c075 | 334 | my_friendly_abort (19991113); |
390f4e9a MM |
335 | /* For a SCOPE_STMT, we must copy the associated block so that we |
336 | can write out debugging information for the inlined variables. */ | |
337 | else if (TREE_CODE (*tp) == SCOPE_STMT && !id->in_target_cleanup_p) | |
338 | copy_scope_stmt (tp, walk_subtrees, id); | |
46e8c075 MM |
339 | /* Otherwise, just copy the node. Note that copy_tree_r already |
340 | knows not to copy VAR_DECLs, etc., so this is safe. */ | |
341 | else | |
342 | { | |
343 | copy_tree_r (tp, walk_subtrees, NULL); | |
344 | ||
345 | /* The copied TARGET_EXPR has never been expanded, even if the | |
346 | original node was expanded already. */ | |
347 | if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3)) | |
ef97bf6b MM |
348 | { |
349 | TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3); | |
350 | TREE_OPERAND (*tp, 3) = NULL_TREE; | |
351 | } | |
6001735e JJ |
352 | else if (TREE_CODE (*tp) == MODIFY_EXPR |
353 | && TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1) | |
354 | && nonstatic_local_decl_p (TREE_OPERAND (*tp, 0)) | |
355 | && DECL_CONTEXT (TREE_OPERAND (*tp, 0)) == fn) | |
356 | { | |
64b9f199 JJ |
357 | /* Some assignments VAR = VAR; don't generate any rtl code |
358 | and thus don't count as variable modification. Avoid | |
6001735e JJ |
359 | keeping bogosities like 0 = 0. */ |
360 | tree decl = TREE_OPERAND (*tp, 0), value; | |
361 | splay_tree_node n; | |
362 | ||
363 | n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl); | |
364 | if (n) | |
365 | { | |
366 | value = (tree) n->value; | |
367 | STRIP_TYPE_NOPS (value); | |
368 | if (TREE_CONSTANT (value) || TREE_READONLY_DECL_P (value)) | |
369 | *tp = value; | |
370 | } | |
371 | } | |
46e8c075 MM |
372 | } |
373 | ||
374 | /* Keep iterating. */ | |
375 | return NULL_TREE; | |
376 | } | |
377 | ||
378 | /* Make a copy of the body of FN so that it can be inserted inline in | |
379 | another function. */ | |
380 | ||
381 | static tree | |
382 | copy_body (id) | |
383 | inline_data *id; | |
384 | { | |
385 | tree body; | |
386 | ||
390f4e9a | 387 | body = DECL_SAVED_TREE (VARRAY_TOP_TREE (id->fns)); |
ee94fce6 | 388 | walk_tree (&body, copy_body_r, id, NULL); |
46e8c075 MM |
389 | |
390 | return body; | |
391 | } | |
392 | ||
393 | /* Generate code to initialize the parameters of the function at the | |
394 | top of the stack in ID from the ARGS (presented as a TREE_LIST). */ | |
395 | ||
396 | static tree | |
92e8164f | 397 | initialize_inlined_parameters (id, args, fn) |
46e8c075 MM |
398 | inline_data *id; |
399 | tree args; | |
92e8164f | 400 | tree fn; |
46e8c075 | 401 | { |
46e8c075 MM |
402 | tree init_stmts; |
403 | tree parms; | |
404 | tree a; | |
405 | tree p; | |
406 | ||
407 | /* Figure out what the parameters are. */ | |
46e8c075 MM |
408 | parms = DECL_ARGUMENTS (fn); |
409 | ||
410 | /* Start with no initializations whatsoever. */ | |
411 | init_stmts = NULL_TREE; | |
412 | ||
413 | /* Loop through the parameter declarations, replacing each with an | |
414 | equivalent VAR_DECL, appropriately initialized. */ | |
415 | for (p = parms, a = args; p; a = TREE_CHAIN (a), p = TREE_CHAIN (p)) | |
416 | { | |
417 | tree init_stmt; | |
418 | tree var; | |
27c58e25 | 419 | tree value; |
9c96f3f8 | 420 | |
27c58e25 MM |
421 | /* Find the initializer. */ |
422 | value = TREE_VALUE (a); | |
423 | /* If the parameter is never assigned to, we may not need to | |
424 | create a new variable here at all. Instead, we may be able | |
425 | to just use the argument value. */ | |
9c96f3f8 | 426 | if (TREE_READONLY (p) |
04dfcc8f MM |
427 | && !TREE_ADDRESSABLE (p) |
428 | && !TREE_SIDE_EFFECTS (value)) | |
27c58e25 MM |
429 | { |
430 | /* Simplify the value, if possible. */ | |
431 | value = fold (decl_constant_value (value)); | |
9c96f3f8 | 432 | |
27c58e25 MM |
433 | /* We can't risk substituting complex expressions. They |
434 | might contain variables that will be assigned to later. | |
435 | Theoretically, we could check the expression to see if | |
436 | all of the variables that determine its value are | |
437 | read-only, but we don't bother. */ | |
438 | if (TREE_CONSTANT (value) || TREE_READONLY_DECL_P (value)) | |
439 | { | |
440 | /* If this is a declaration, wrap it a NOP_EXPR so that | |
441 | we don't try to put the VALUE on the list of | |
442 | BLOCK_VARS. */ | |
443 | if (DECL_P (value)) | |
444 | value = build1 (NOP_EXPR, TREE_TYPE (value), value); | |
445 | ||
446 | splay_tree_insert (id->decl_map, | |
447 | (splay_tree_key) p, | |
448 | (splay_tree_value) value); | |
449 | continue; | |
450 | } | |
451 | } | |
9c96f3f8 | 452 | |
46e8c075 MM |
453 | /* Make an equivalent VAR_DECL. */ |
454 | var = copy_decl_for_inlining (p, fn, VARRAY_TREE (id->fns, 0)); | |
455 | /* Register the VAR_DECL as the equivalent for the PARM_DECL; | |
456 | that way, when the PARM_DECL is encountered, it will be | |
457 | automatically replaced by the VAR_DECL. */ | |
9c96f3f8 | 458 | splay_tree_insert (id->decl_map, |
46e8c075 MM |
459 | (splay_tree_key) p, |
460 | (splay_tree_value) var); | |
5062dbd5 JM |
461 | |
462 | /* Declare this new variable. */ | |
0dfdeca6 | 463 | init_stmt = build_stmt (DECL_STMT, var); |
5062dbd5 JM |
464 | TREE_CHAIN (init_stmt) = init_stmts; |
465 | init_stmts = init_stmt; | |
466 | ||
46e8c075 MM |
467 | /* Initialize this VAR_DECL from the equivalent argument. If |
468 | the argument is an object, created via a constructor or copy, | |
469 | this will not result in an extra copy: the TARGET_EXPR | |
470 | representing the argument will be bound to VAR, and the | |
471 | object will be constructed in VAR. */ | |
5062dbd5 JM |
472 | if (! TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p))) |
473 | DECL_INITIAL (var) = value; | |
474 | else | |
475 | { | |
0dfdeca6 BC |
476 | init_stmt = build_stmt (EXPR_STMT, |
477 | build (INIT_EXPR, TREE_TYPE (p), | |
478 | var, value)); | |
5062dbd5 JM |
479 | /* Add this initialization to the list. Note that we want the |
480 | declaration *after* the initialization because we are going | |
481 | to reverse all the initialization statements below. */ | |
482 | TREE_CHAIN (init_stmt) = init_stmts; | |
483 | init_stmts = init_stmt; | |
484 | } | |
46e8c075 MM |
485 | } |
486 | ||
487 | /* The initialization statements have been built up in reverse | |
488 | order. Straighten them out now. */ | |
489 | return nreverse (init_stmts); | |
490 | } | |
491 | ||
492 | /* Declare a return variable to replace the RESULT_DECL for the | |
493 | function we are calling. An appropriate DECL_STMT is returned. | |
494 | The USE_STMT is filled in to contain a use of the declaration to | |
495 | indicate the return value of the function. */ | |
496 | ||
497 | static tree | |
498 | declare_return_variable (id, use_stmt) | |
499 | struct inline_data *id; | |
500 | tree *use_stmt; | |
501 | { | |
390f4e9a | 502 | tree fn = VARRAY_TOP_TREE (id->fns); |
46e8c075 MM |
503 | tree result = DECL_RESULT (fn); |
504 | tree var; | |
738e2810 | 505 | int aggregate_return_p; |
46e8c075 MM |
506 | |
507 | /* We don't need to do anything for functions that don't return | |
508 | anything. */ | |
b72801e2 | 509 | if (!result || VOID_TYPE_P (TREE_TYPE (result))) |
46e8c075 MM |
510 | { |
511 | *use_stmt = NULL_TREE; | |
512 | return NULL_TREE; | |
513 | } | |
514 | ||
738e2810 MM |
515 | /* Figure out whether or not FN returns an aggregate. */ |
516 | aggregate_return_p = IS_AGGR_TYPE (TREE_TYPE (result)); | |
517 | ||
518 | /* If FN returns an aggregate then the caller will always create the | |
519 | temporary (using a TARGET_EXPR) and the call will be the | |
520 | initializing expression for the TARGET_EXPR. If we were just to | |
521 | create a new VAR_DECL here, then the result of this function | |
522 | would be copied (bitwise) into the variable initialized by the | |
523 | TARGET_EXPR. That's incorrect, so we must transform any | |
524 | references to the RESULT into references to the target. */ | |
525 | if (aggregate_return_p) | |
526 | { | |
b3bae5e2 | 527 | my_friendly_assert (VARRAY_ACTIVE_SIZE (id->target_exprs) != 0, |
738e2810 MM |
528 | 20000430); |
529 | var = TREE_OPERAND (VARRAY_TOP_TREE (id->target_exprs), 0); | |
9c96f3f8 AJ |
530 | my_friendly_assert |
531 | (same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (var), | |
9edc3913 MM |
532 | TREE_TYPE (result)), |
533 | 20000430); | |
738e2810 MM |
534 | } |
535 | /* Otherwise, make an appropriate copy. */ | |
536 | else | |
537 | var = copy_decl_for_inlining (result, fn, VARRAY_TREE (id->fns, 0)); | |
538 | ||
46e8c075 MM |
539 | /* Register the VAR_DECL as the equivalent for the RESULT_DECL; that |
540 | way, when the RESULT_DECL is encountered, it will be | |
541 | automatically replaced by the VAR_DECL. */ | |
9c96f3f8 | 542 | splay_tree_insert (id->decl_map, |
46e8c075 MM |
543 | (splay_tree_key) result, |
544 | (splay_tree_value) var); | |
545 | ||
546 | /* Build the USE_STMT. */ | |
0dfdeca6 | 547 | *use_stmt = build_stmt (EXPR_STMT, var); |
46e8c075 | 548 | |
738e2810 MM |
549 | /* Build the declaration statement if FN does not return an |
550 | aggregate. */ | |
551 | if (!aggregate_return_p) | |
0dfdeca6 | 552 | return build_stmt (DECL_STMT, var); |
738e2810 MM |
553 | /* If FN does return an aggregate, there's no need to declare the |
554 | return variable; we're using a variable in our caller's frame. */ | |
555 | else | |
556 | return NULL_TREE; | |
46e8c075 MM |
557 | } |
558 | ||
559 | /* Returns non-zero if FN is a function that can be inlined. */ | |
560 | ||
561 | static int | |
562 | inlinable_function_p (fn, id) | |
563 | tree fn; | |
564 | inline_data *id; | |
565 | { | |
566 | int inlinable; | |
567 | ||
568 | /* If we've already decided this function shouldn't be inlined, | |
569 | there's no need to check again. */ | |
570 | if (DECL_UNINLINABLE (fn)) | |
571 | return 0; | |
572 | ||
573 | /* Assume it is not inlinable. */ | |
574 | inlinable = 0; | |
575 | ||
390f4e9a MM |
576 | /* If we're not inlining things, then nothing is inlinable. */ |
577 | if (!flag_inline_trees) | |
578 | ; | |
46e8c075 MM |
579 | /* If the function was not declared `inline', then we don't inline |
580 | it. */ | |
390f4e9a | 581 | else if (!DECL_INLINE (fn)) |
46e8c075 | 582 | ; |
46e8c075 MM |
583 | /* We can't inline varargs functions. */ |
584 | else if (varargs_function_p (fn)) | |
585 | ; | |
586 | /* All is well. We can inline this function. Traditionally, GCC | |
89a75b6d JM |
587 | has refused to inline functions using alloca, or functions whose |
588 | values are returned in a PARALLEL, and a few other such obscure | |
589 | conditions. We are not equally constrained at the tree level. */ | |
46e8c075 MM |
590 | else |
591 | inlinable = 1; | |
592 | ||
593 | /* Squirrel away the result so that we don't have to check again. */ | |
594 | DECL_UNINLINABLE (fn) = !inlinable; | |
595 | ||
16d53b64 MM |
596 | /* We can inline a template instantiation only if it's fully |
597 | instantiated. */ | |
9c96f3f8 AJ |
598 | if (inlinable |
599 | && DECL_TEMPLATE_INFO (fn) | |
16d53b64 MM |
600 | && TI_PENDING_TEMPLATE_FLAG (DECL_TEMPLATE_INFO (fn))) |
601 | { | |
602 | fn = instantiate_decl (fn, /*defer_ok=*/0); | |
603 | inlinable = !TI_PENDING_TEMPLATE_FLAG (DECL_TEMPLATE_INFO (fn)); | |
604 | } | |
605 | ||
606 | /* If we don't have the function body available, we can't inline | |
607 | it. */ | |
608 | if (!DECL_SAVED_TREE (fn)) | |
609 | inlinable = 0; | |
610 | ||
46e8c075 | 611 | /* Don't do recursive inlining, either. We don't record this in |
b3bae5e2 | 612 | DECL_UNINLINABLE; we may be able to inline this function later. */ |
46e8c075 MM |
613 | if (inlinable) |
614 | { | |
615 | size_t i; | |
616 | ||
b3bae5e2 | 617 | for (i = 0; i < VARRAY_ACTIVE_SIZE (id->fns); ++i) |
46e8c075 | 618 | if (VARRAY_TREE (id->fns, i) == fn) |
b3bae5e2 JJ |
619 | return 0; |
620 | ||
621 | if (inlinable && DECL_LANG_SPECIFIC (fn) && DECL_INLINED_FNS (fn)) | |
622 | { | |
623 | struct lang_decl_inlined_fns *ifn = DECL_INLINED_FNS (fn); | |
624 | ||
625 | for (i = 0; i < ifn->num_fns; ++i) | |
626 | if (ifn->fns [i] == VARRAY_TREE (id->fns, 0)) | |
627 | return 0; | |
628 | } | |
46e8c075 MM |
629 | } |
630 | ||
46e8c075 MM |
631 | /* Return the result. */ |
632 | return inlinable; | |
633 | } | |
634 | ||
8890f3d8 | 635 | /* If *TP is a CALL_EXPR, replace it with its inline expansion. */ |
46e8c075 MM |
636 | |
637 | static tree | |
638 | expand_call_inline (tp, walk_subtrees, data) | |
639 | tree *tp; | |
640 | int *walk_subtrees; | |
641 | void *data; | |
642 | { | |
643 | inline_data *id; | |
644 | tree t; | |
645 | tree expr; | |
646 | tree chain; | |
647 | tree fn; | |
390f4e9a | 648 | tree scope_stmt; |
46e8c075 | 649 | tree use_stmt; |
92e8164f | 650 | tree arg_inits; |
071f9809 | 651 | tree *inlined_body; |
46e8c075 MM |
652 | splay_tree st; |
653 | ||
390f4e9a MM |
654 | /* See what we've got. */ |
655 | id = (inline_data *) data; | |
9c96f3f8 | 656 | t = *tp; |
390f4e9a | 657 | |
390f4e9a MM |
658 | /* Recurse, but letting recursive invocations know that we are |
659 | inside the body of a TARGET_EXPR. */ | |
660 | if (TREE_CODE (*tp) == TARGET_EXPR) | |
661 | { | |
5afb79e7 | 662 | int i, len = first_rtl_op (TARGET_EXPR); |
390f4e9a MM |
663 | |
664 | /* We're walking our own subtrees. */ | |
665 | *walk_subtrees = 0; | |
666 | ||
738e2810 MM |
667 | /* Push *TP on the stack of pending TARGET_EXPRs. */ |
668 | VARRAY_PUSH_TREE (id->target_exprs, *tp); | |
669 | ||
390f4e9a MM |
670 | /* Actually walk over them. This loop is the body of |
671 | walk_trees, omitting the case where the TARGET_EXPR | |
672 | itself is handled. */ | |
5afb79e7 | 673 | for (i = 0; i < len; ++i) |
390f4e9a MM |
674 | { |
675 | if (i == 2) | |
676 | ++id->in_target_cleanup_p; | |
ee94fce6 MM |
677 | walk_tree (&TREE_OPERAND (*tp, i), expand_call_inline, data, |
678 | NULL); | |
390f4e9a MM |
679 | if (i == 2) |
680 | --id->in_target_cleanup_p; | |
681 | } | |
682 | ||
738e2810 MM |
683 | /* We're done with this TARGET_EXPR now. */ |
684 | VARRAY_POP (id->target_exprs); | |
685 | ||
390f4e9a MM |
686 | return NULL_TREE; |
687 | } | |
688 | ||
612164eb KL |
689 | if (TREE_CODE_CLASS (TREE_CODE (t)) == 't') |
690 | /* Because types were not copied in copy_body, CALL_EXPRs beneath | |
691 | them should not be expanded. This can happen if the type is a | |
692 | dynamic array type, for example. */ | |
693 | *walk_subtrees = 0; | |
694 | ||
390f4e9a | 695 | /* From here on, we're only interested in CALL_EXPRs. */ |
46e8c075 MM |
696 | if (TREE_CODE (t) != CALL_EXPR) |
697 | return NULL_TREE; | |
698 | ||
699 | /* First, see if we can figure out what function is being called. | |
700 | If we cannot, then there is no hope of inlining the function. */ | |
701 | fn = get_callee_fndecl (t); | |
702 | if (!fn) | |
703 | return NULL_TREE; | |
704 | ||
705 | /* Don't try to inline functions that are not well-suited to | |
706 | inlining. */ | |
46e8c075 MM |
707 | if (!inlinable_function_p (fn, id)) |
708 | return NULL_TREE; | |
709 | ||
574a0ef5 MM |
710 | /* Set the current filename and line number to the function we are |
711 | inlining so that when we create new _STMT nodes here they get | |
712 | line numbers corresponding to the function we are calling. We | |
713 | wrap the whole inlined body in an EXPR_WITH_FILE_AND_LINE as well | |
714 | because individual statements don't record the filename. */ | |
715 | push_srcloc (fn->decl.filename, fn->decl.linenum); | |
716 | ||
46e8c075 MM |
717 | /* Build a statement-expression containing code to initialize the |
718 | arguments, the actual inline expansion of the body, and a label | |
719 | for the return statements within the function to jump to. The | |
720 | type of the statement expression is the return type of the | |
721 | function call. */ | |
722 | expr = build_min (STMT_EXPR, TREE_TYPE (TREE_TYPE (fn)), NULL_TREE); | |
723 | ||
46e8c075 MM |
724 | /* Local declarations will be replaced by their equivalents in this |
725 | map. */ | |
726 | st = id->decl_map; | |
727 | id->decl_map = splay_tree_new (splay_tree_compare_pointers, | |
728 | NULL, NULL); | |
729 | ||
730 | /* Initialize the parameters. */ | |
92e8164f MM |
731 | arg_inits = initialize_inlined_parameters (id, TREE_OPERAND (t, 1), fn); |
732 | /* Expand any inlined calls in the initializers. Do this before we | |
733 | push FN on the stack of functions we are inlining; we want to | |
734 | inline calls to FN that appear in the initializers for the | |
735 | parameters. */ | |
736 | expand_calls_inline (&arg_inits, id); | |
737 | /* And add them to the tree. */ | |
738 | STMT_EXPR_STMT (expr) = chainon (STMT_EXPR_STMT (expr), arg_inits); | |
739 | ||
740 | /* Record the function we are about to inline so that we can avoid | |
741 | recursing into it. */ | |
742 | VARRAY_PUSH_TREE (id->fns, fn); | |
743 | ||
b3bae5e2 JJ |
744 | /* Record the function we are about to inline if optimize_function |
745 | has not been called on it yet and we don't have it in the list. */ | |
746 | if (DECL_LANG_SPECIFIC (fn) && !DECL_INLINED_FNS (fn)) | |
747 | { | |
748 | int i; | |
749 | ||
750 | for (i = VARRAY_ACTIVE_SIZE (id->inlined_fns) - 1; i >= 0; i--) | |
751 | if (VARRAY_TREE (id->inlined_fns, i) == fn) | |
752 | break; | |
753 | if (i < 0) | |
754 | VARRAY_PUSH_TREE (id->inlined_fns, fn); | |
755 | } | |
756 | ||
92e8164f MM |
757 | /* Return statements in the function body will be replaced by jumps |
758 | to the RET_LABEL. */ | |
759 | id->ret_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); | |
760 | DECL_CONTEXT (id->ret_label) = VARRAY_TREE (id->fns, 0); | |
761 | ||
390f4e9a MM |
762 | /* Create a block to put the parameters in. We have to do this |
763 | after the parameters have been remapped because remapping | |
764 | parameters is different from remapping ordinary variables. */ | |
0dfdeca6 | 765 | scope_stmt = build_stmt (SCOPE_STMT, DECL_INITIAL (fn)); |
390f4e9a MM |
766 | SCOPE_BEGIN_P (scope_stmt) = 1; |
767 | SCOPE_NO_CLEANUPS_P (scope_stmt) = 1; | |
768 | remap_block (scope_stmt, DECL_ARGUMENTS (fn), id); | |
769 | TREE_CHAIN (scope_stmt) = STMT_EXPR_STMT (expr); | |
770 | STMT_EXPR_STMT (expr) = scope_stmt; | |
46e8c075 | 771 | |
8cb360d3 | 772 | /* Tell the debugging backends that this block represents the |
a97901e6 | 773 | outermost scope of the inlined function. */ |
8cb360d3 JM |
774 | if (SCOPE_STMT_BLOCK (scope_stmt)) |
775 | BLOCK_ABSTRACT_ORIGIN (SCOPE_STMT_BLOCK (scope_stmt)) = DECL_ORIGIN (fn); | |
776 | ||
46e8c075 MM |
777 | /* Declare the return variable for the function. */ |
778 | STMT_EXPR_STMT (expr) | |
9c96f3f8 | 779 | = chainon (STMT_EXPR_STMT (expr), |
46e8c075 | 780 | declare_return_variable (id, &use_stmt)); |
9c96f3f8 | 781 | |
46e8c075 MM |
782 | /* After we've initialized the parameters, we insert the body of the |
783 | function itself. */ | |
071f9809 MM |
784 | inlined_body = &STMT_EXPR_STMT (expr); |
785 | while (*inlined_body) | |
786 | inlined_body = &TREE_CHAIN (*inlined_body); | |
787 | *inlined_body = copy_body (id); | |
46e8c075 | 788 | |
390f4e9a | 789 | /* Close the block for the parameters. */ |
0dfdeca6 | 790 | scope_stmt = build_stmt (SCOPE_STMT, DECL_INITIAL (fn)); |
390f4e9a | 791 | SCOPE_NO_CLEANUPS_P (scope_stmt) = 1; |
9c96f3f8 | 792 | my_friendly_assert (DECL_INITIAL (fn) |
390f4e9a MM |
793 | && TREE_CODE (DECL_INITIAL (fn)) == BLOCK, |
794 | 19991203); | |
795 | remap_block (scope_stmt, NULL_TREE, id); | |
796 | STMT_EXPR_STMT (expr) | |
797 | = chainon (STMT_EXPR_STMT (expr), scope_stmt); | |
798 | ||
3431f196 JW |
799 | /* After the body of the function comes the RET_LABEL. This must come |
800 | before we evaluate the returned value below, because that evalulation | |
801 | may cause RTL to be generated. */ | |
802 | STMT_EXPR_STMT (expr) | |
9c96f3f8 | 803 | = chainon (STMT_EXPR_STMT (expr), |
0dfdeca6 | 804 | build_stmt (LABEL_STMT, id->ret_label)); |
3431f196 | 805 | |
46e8c075 MM |
806 | /* Finally, mention the returned value so that the value of the |
807 | statement-expression is the returned value of the function. */ | |
808 | STMT_EXPR_STMT (expr) = chainon (STMT_EXPR_STMT (expr), use_stmt); | |
809 | ||
810 | /* Clean up. */ | |
811 | splay_tree_delete (id->decl_map); | |
812 | id->decl_map = st; | |
813 | ||
46e8c075 MM |
814 | /* The new expression has side-effects if the old one did. */ |
815 | TREE_SIDE_EFFECTS (expr) = TREE_SIDE_EFFECTS (t); | |
5679f678 MM |
816 | |
817 | /* Replace the call by the inlined body. Wrap it in an | |
818 | EXPR_WITH_FILE_LOCATION so that we'll get debugging line notes | |
819 | pointing to the right place. */ | |
820 | chain = TREE_CHAIN (*tp); | |
821 | *tp = build_expr_wfl (expr, DECL_SOURCE_FILE (fn), DECL_SOURCE_LINE (fn), | |
822 | /*col=*/0); | |
823 | EXPR_WFL_EMIT_LINE_NOTE (*tp) = 1; | |
824 | TREE_CHAIN (*tp) = chain; | |
574a0ef5 | 825 | pop_srcloc (); |
5679f678 | 826 | |
46e8c075 MM |
827 | /* If the value of the new expression is ignored, that's OK. We |
828 | don't warn about this for CALL_EXPRs, so we shouldn't warn about | |
829 | the equivalent inlined version either. */ | |
5679f678 | 830 | TREE_USED (*tp) = 1; |
46e8c075 MM |
831 | |
832 | /* Recurse into the body of the just inlined function. */ | |
071f9809 | 833 | expand_calls_inline (inlined_body, id); |
390f4e9a | 834 | VARRAY_POP (id->fns); |
46e8c075 MM |
835 | |
836 | /* Don't walk into subtrees. We've already handled them above. */ | |
837 | *walk_subtrees = 0; | |
838 | ||
839 | /* Keep iterating. */ | |
840 | return NULL_TREE; | |
841 | } | |
842 | ||
843 | /* Walk over the entire tree *TP, replacing CALL_EXPRs with inline | |
844 | expansions as appropriate. */ | |
845 | ||
846 | static void | |
847 | expand_calls_inline (tp, id) | |
848 | tree *tp; | |
849 | inline_data *id; | |
850 | { | |
851 | /* Search through *TP, replacing all calls to inline functions by | |
852 | appropriate equivalents. */ | |
ee94fce6 | 853 | walk_tree (tp, expand_call_inline, id, NULL); |
46e8c075 MM |
854 | } |
855 | ||
856 | /* Optimize the body of FN. */ | |
857 | ||
858 | void | |
859 | optimize_function (fn) | |
860 | tree fn; | |
861 | { | |
b2244c65 MM |
862 | /* While in this function, we may choose to go off and compile |
863 | another function. For example, we might instantiate a function | |
864 | in the hopes of inlining it. Normally, that wouldn't trigger any | |
865 | actual RTL code-generation -- but it will if the template is | |
866 | actually needed. (For example, if it's address is taken, or if | |
867 | some other function already refers to the template.) If | |
868 | code-generation occurs, then garbage collection will occur, so we | |
869 | must protect ourselves, just as we do while building up the body | |
870 | of the function. */ | |
871 | ++function_depth; | |
872 | ||
46e8c075 MM |
873 | /* Expand calls to inline functions. */ |
874 | if (flag_inline_trees) | |
875 | { | |
876 | inline_data id; | |
390f4e9a MM |
877 | tree prev_fn; |
878 | struct saved_scope *s; | |
46e8c075 MM |
879 | |
880 | /* Clear out ID. */ | |
486837a7 | 881 | memset (&id, 0, sizeof (id)); |
46e8c075 MM |
882 | |
883 | /* Don't allow recursion into FN. */ | |
884 | VARRAY_TREE_INIT (id.fns, 32, "fns"); | |
390f4e9a MM |
885 | VARRAY_PUSH_TREE (id.fns, fn); |
886 | /* Or any functions that aren't finished yet. */ | |
887 | prev_fn = NULL_TREE; | |
888 | if (current_function_decl) | |
889 | { | |
890 | VARRAY_PUSH_TREE (id.fns, current_function_decl); | |
891 | prev_fn = current_function_decl; | |
892 | } | |
893 | for (s = scope_chain; s; s = s->prev) | |
894 | if (s->function_decl && s->function_decl != prev_fn) | |
895 | { | |
896 | VARRAY_PUSH_TREE (id.fns, s->function_decl); | |
897 | prev_fn = s->function_decl; | |
898 | } | |
5afb79e7 | 899 | |
738e2810 MM |
900 | /* Create the stack of TARGET_EXPRs. */ |
901 | VARRAY_TREE_INIT (id.target_exprs, 32, "target_exprs"); | |
902 | ||
b3bae5e2 JJ |
903 | /* Create the list of functions this call will inline. */ |
904 | VARRAY_TREE_INIT (id.inlined_fns, 32, "inlined_fns"); | |
905 | ||
46e8c075 MM |
906 | /* Replace all calls to inline functions with the bodies of those |
907 | functions. */ | |
908 | expand_calls_inline (&DECL_SAVED_TREE (fn), &id); | |
909 | ||
910 | /* Clean up. */ | |
911 | VARRAY_FREE (id.fns); | |
738e2810 | 912 | VARRAY_FREE (id.target_exprs); |
b3bae5e2 JJ |
913 | if (DECL_LANG_SPECIFIC (fn)) |
914 | { | |
915 | struct lang_decl_inlined_fns *ifn; | |
916 | ||
917 | ifn = ggc_alloc (sizeof (struct lang_decl_inlined_fns) | |
918 | + (VARRAY_ACTIVE_SIZE (id.inlined_fns) - 1) | |
919 | * sizeof (tree)); | |
920 | ifn->num_fns = VARRAY_ACTIVE_SIZE (id.inlined_fns); | |
921 | memcpy (&ifn->fns[0], &VARRAY_TREE (id.inlined_fns, 0), | |
922 | ifn->num_fns * sizeof (tree)); | |
923 | DECL_INLINED_FNS (fn) = ifn; | |
924 | } | |
925 | VARRAY_FREE (id.inlined_fns); | |
46e8c075 | 926 | } |
b2244c65 MM |
927 | |
928 | /* Undo the call to ggc_push_context above. */ | |
929 | --function_depth; | |
46e8c075 | 930 | } |
95fabfd3 MM |
931 | |
932 | /* Called from calls_setjmp_p via walk_tree. */ | |
933 | ||
934 | static tree | |
935 | calls_setjmp_r (tp, walk_subtrees, data) | |
936 | tree *tp; | |
937 | int *walk_subtrees ATTRIBUTE_UNUSED; | |
938 | void *data ATTRIBUTE_UNUSED; | |
939 | { | |
95fabfd3 MM |
940 | /* We're only interested in FUNCTION_DECLS. */ |
941 | if (TREE_CODE (*tp) != FUNCTION_DECL) | |
942 | return NULL_TREE; | |
943 | ||
c9fff01f | 944 | return setjmp_call_p (*tp) ? *tp : NULL_TREE; |
95fabfd3 MM |
945 | } |
946 | ||
947 | /* Returns non-zero if FN calls `setjmp' or some other function that | |
948 | can return more than once. This function is conservative; it may | |
949 | occasionally return a non-zero value even when FN does not actually | |
950 | call `setjmp'. */ | |
951 | ||
952 | int | |
953 | calls_setjmp_p (fn) | |
954 | tree fn; | |
955 | { | |
9c96f3f8 AJ |
956 | return walk_tree_without_duplicates (&DECL_SAVED_TREE (fn), |
957 | calls_setjmp_r, | |
ee94fce6 | 958 | NULL) != NULL_TREE; |
95fabfd3 MM |
959 | } |
960 | ||
db9b2174 MM |
961 | /* FN is a function that has a complete body. Clone the body as |
962 | necessary. Returns non-zero if there's no longer any need to | |
963 | process the main body. */ | |
964 | ||
965 | int | |
966 | maybe_clone_body (fn) | |
967 | tree fn; | |
968 | { | |
969 | inline_data id; | |
970 | tree clone; | |
971 | ||
db9b2174 MM |
972 | /* We only clone constructors and destructors. */ |
973 | if (!DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (fn) | |
974 | && !DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (fn)) | |
975 | return 0; | |
976 | ||
5daf7c0a JM |
977 | /* Emit the DWARF1 abstract instance. */ |
978 | note_deferral_of_defined_inline_function (fn); | |
979 | ||
db9b2174 MM |
980 | /* We know that any clones immediately follow FN in the TYPE_METHODS |
981 | list. */ | |
982 | for (clone = TREE_CHAIN (fn); | |
983 | clone && DECL_CLONED_FUNCTION_P (clone); | |
984 | clone = TREE_CHAIN (clone)) | |
985 | { | |
986 | tree parm; | |
987 | tree clone_parm; | |
988 | int parmno; | |
989 | ||
990 | /* Update CLONE's source position information to match FN's. */ | |
991 | DECL_SOURCE_FILE (clone) = DECL_SOURCE_FILE (fn); | |
992 | DECL_SOURCE_LINE (clone) = DECL_SOURCE_LINE (fn); | |
99389463 MM |
993 | DECL_INLINE (clone) = DECL_INLINE (fn); |
994 | DECL_THIS_INLINE (clone) = DECL_THIS_INLINE (fn); | |
3ec6bad3 MM |
995 | DECL_COMDAT (clone) = DECL_COMDAT (fn); |
996 | DECL_WEAK (clone) = DECL_WEAK (fn); | |
997 | DECL_ONE_ONLY (clone) = DECL_ONE_ONLY (fn); | |
998 | DECL_SECTION_NAME (clone) = DECL_SECTION_NAME (fn); | |
459c43ad MM |
999 | DECL_USE_TEMPLATE (clone) = DECL_USE_TEMPLATE (fn); |
1000 | DECL_EXTERNAL (clone) = DECL_EXTERNAL (fn); | |
1001 | DECL_INTERFACE_KNOWN (clone) = DECL_INTERFACE_KNOWN (fn); | |
1002 | DECL_NOT_REALLY_EXTERN (clone) = DECL_NOT_REALLY_EXTERN (fn); | |
db9b2174 MM |
1003 | |
1004 | /* Start processing the function. */ | |
1005 | push_to_top_level (); | |
1006 | start_function (NULL_TREE, clone, NULL_TREE, SF_PRE_PARSED); | |
db9b2174 MM |
1007 | |
1008 | /* Just clone the body, as if we were making an inline call. | |
1009 | But, remap the parameters in the callee to the parameters of | |
1010 | caller. If there's an in-charge parameter, map it to an | |
1011 | appropriate constant. */ | |
1012 | memset (&id, 0, sizeof (id)); | |
1013 | VARRAY_TREE_INIT (id.fns, 2, "fns"); | |
1014 | VARRAY_PUSH_TREE (id.fns, clone); | |
1015 | VARRAY_PUSH_TREE (id.fns, fn); | |
1016 | ||
1017 | /* Remap the parameters. */ | |
1018 | id.decl_map = splay_tree_new (splay_tree_compare_pointers, | |
1019 | NULL, NULL); | |
1020 | for (parmno = 0, | |
1021 | parm = DECL_ARGUMENTS (fn), | |
1022 | clone_parm = DECL_ARGUMENTS (clone); | |
1023 | parm; | |
1024 | ++parmno, | |
1025 | parm = TREE_CHAIN (parm)) | |
1026 | { | |
1027 | /* Map the in-charge parameter to an appropriate constant. */ | |
1028 | if (DECL_HAS_IN_CHARGE_PARM_P (fn) && parmno == 1) | |
1029 | { | |
1030 | tree in_charge; | |
298d6f60 | 1031 | in_charge = in_charge_arg_for_name (DECL_NAME (clone)); |
db9b2174 MM |
1032 | splay_tree_insert (id.decl_map, |
1033 | (splay_tree_key) parm, | |
3ec6bad3 | 1034 | (splay_tree_value) in_charge); |
e0fff4b3 JM |
1035 | } |
1036 | else if (DECL_ARTIFICIAL (parm) | |
1037 | && DECL_NAME (parm) == vtt_parm_identifier) | |
1038 | { | |
3ec6bad3 MM |
1039 | /* For a subobject constructor or destructor, the next |
1040 | argument is the VTT parameter. Remap the VTT_PARM | |
1041 | from the CLONE to this parameter. */ | |
e0fff4b3 | 1042 | if (DECL_HAS_VTT_PARM_P (clone)) |
3ec6bad3 | 1043 | { |
5daf7c0a | 1044 | DECL_ABSTRACT_ORIGIN (clone_parm) = parm; |
3ec6bad3 | 1045 | splay_tree_insert (id.decl_map, |
e0fff4b3 | 1046 | (splay_tree_key) parm, |
3ec6bad3 | 1047 | (splay_tree_value) clone_parm); |
3ec6bad3 MM |
1048 | clone_parm = TREE_CHAIN (clone_parm); |
1049 | } | |
1050 | /* Otherwise, map the VTT parameter to `NULL'. */ | |
e0fff4b3 | 1051 | else |
3ec6bad3 MM |
1052 | { |
1053 | splay_tree_insert (id.decl_map, | |
e0fff4b3 | 1054 | (splay_tree_key) parm, |
3ec6bad3 | 1055 | (splay_tree_value) null_pointer_node); |
3ec6bad3 | 1056 | } |
db9b2174 MM |
1057 | } |
1058 | /* Map other parameters to their equivalents in the cloned | |
1059 | function. */ | |
1060 | else | |
1061 | { | |
5daf7c0a | 1062 | DECL_ABSTRACT_ORIGIN (clone_parm) = parm; |
db9b2174 MM |
1063 | splay_tree_insert (id.decl_map, |
1064 | (splay_tree_key) parm, | |
1065 | (splay_tree_value) clone_parm); | |
1066 | clone_parm = TREE_CHAIN (clone_parm); | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | /* Actually copy the body. */ | |
1071 | TREE_CHAIN (DECL_SAVED_TREE (clone)) = copy_body (&id); | |
1072 | ||
1073 | /* Clean up. */ | |
1074 | splay_tree_delete (id.decl_map); | |
1075 | VARRAY_FREE (id.fns); | |
1076 | ||
1077 | /* Now, expand this function into RTL, if appropriate. */ | |
8f17b5c5 | 1078 | function_name_declared_p = 1; |
5daf7c0a JM |
1079 | finish_function (0); |
1080 | BLOCK_ABSTRACT_ORIGIN (DECL_INITIAL (clone)) = DECL_INITIAL (fn); | |
1081 | expand_body (clone); | |
db9b2174 MM |
1082 | pop_from_top_level (); |
1083 | } | |
9c96f3f8 | 1084 | |
db9b2174 MM |
1085 | /* We don't need to process the original function any further. */ |
1086 | return 1; | |
1087 | } |