1 /* SSA operand management for trees.
2 Copyright (C) 2003, 2005 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
21 #ifndef GCC_TREE_SSA_OPERANDS_H
22 #define GCC_TREE_SSA_OPERANDS_H
24 /* Interface to SSA operands. */
27 /* This represents a pointer to a DEF operand. */
28 typedef tree *def_operand_p;
30 /* This represents a pointer to a USE operand. */
31 typedef ssa_use_operand_t *use_operand_p;
33 /* NULL operand types. */
34 #define NULL_USE_OPERAND_P NULL
35 #define NULL_DEF_OPERAND_P NULL
37 /* This represents the DEF operands of a stmt. */
40 struct def_optype_d *next;
43 typedef struct def_optype_d *def_optype_p;
45 /* This represents the USE operands of a stmt. */
48 struct use_optype_d *next;
49 struct ssa_use_operand_d use_ptr;
51 typedef struct use_optype_d *use_optype_p;
53 typedef struct vuse_element_d
56 struct ssa_use_operand_d use_ptr;
59 typedef struct vuse_vec_d
62 vuse_element_t uses[1];
64 typedef struct vuse_vec_d *vuse_vec_p;
66 #define VUSE_VECT_NUM_ELEM(V) (V).num_vuse
67 #define VUSE_VECT_ELEMENT_NC(V,X) (V).uses[(X)]
68 #define VUSE_ELEMENT_PTR_NC(V,X) (&(VUSE_VECT_ELEMENT_NC ((V),(X)).use_ptr))
69 #define VUSE_ELEMENT_VAR_NC(V,X) (VUSE_VECT_ELEMENT_NC ((V),(X)).use_var)
71 #ifdef ENABLE_CHECKING
72 #define VUSE_VECT_ELEMENT(V,X) \
73 (gcc_assert ((X) >= 0 && (X) < VUSE_VECT_NUM_ELEM (V)), \
74 VUSE_VECT_ELEMENT_NC (V,X))
76 #define VUSE_ELEMENT_PTR(V,X) \
77 (gcc_assert ((X) >= 0 && (X) < VUSE_VECT_NUM_ELEM (V)), \
78 VUSE_ELEMENT_PTR_NC (V, X))
80 #define SET_VUSE_VECT_ELEMENT(V,X,N) \
81 (gcc_assert ((X) >= 0 && (X) < VUSE_VECT_NUM_ELEM (V)), \
82 VUSE_VECT_ELEMENT_NC (V,X) = (N))
84 #define SET_VUSE_ELEMENT_VAR(V,X,N) \
85 (gcc_assert ((X) >= 0 && (X) < VUSE_VECT_NUM_ELEM (V)), \
86 VUSE_VECT_ELEMENT_NC ((V),(X)).use_var = (N))
88 #define SET_VUSE_ELEMENT_PTR(V,X,N) \
89 (gcc_assert ((X) >= 0 && (X) < VUSE_VECT_NUM_ELEM (V)), \
90 VUSE_ELEMENT_PTR_NC (V, X) = (N))
92 #define VUSE_VECT_ELEMENT(V,X) VUSE_VECT_ELEMENT_NC(V,X)
93 #define VUSE_ELEMENT_PTR(V,X) VUSE_ELEMENT_PTR_NC(V,X)
94 #define SET_VUSE_VECT_ELEMENT(V,X,N) VUSE_VECT_ELEMENT_NC(V,X) = (N)
95 #define SET_VUSE_ELEMENT_PTR(V,X,N) VUSE_ELEMENT_PTR_NC(V,X) = (N)
96 #define SET_VUSE_ELEMENT_VAR(V,X,N) VUSE_VECT_ELEMENT_NC ((V),(X)).use_var = (N)
99 #define VUSE_ELEMENT_VAR(V,X) (VUSE_VECT_ELEMENT ((V),(X)).use_var)
101 /* This represents the VDEFS for a stmt. */
104 struct vdef_optype_d *next;
108 typedef struct vdef_optype_d *vdef_optype_p;
110 /* This represents the VUSEs for a stmt. */
113 struct vuse_optype_d *next;
116 typedef struct vuse_optype_d *vuse_optype_p;
119 #define SSA_OPERAND_MEMORY_SIZE (511 * sizeof (struct vuse_optype_d))
121 struct ssa_operand_memory_d GTY((chain_next("%h.next")))
123 struct ssa_operand_memory_d *next;
124 char mem[SSA_OPERAND_MEMORY_SIZE];
127 /* Per-function operand caches. */
128 struct ssa_operands GTY(()) {
129 struct ssa_operand_memory_d *operand_memory;
130 unsigned operand_memory_index;
134 struct def_optype_d * GTY ((skip (""))) free_defs;
135 struct use_optype_d * GTY ((skip (""))) free_uses;
136 struct vuse_optype_d * GTY ((skip (""))) free_vuses;
137 struct vdef_optype_d * GTY ((skip (""))) free_vdefs;
138 VEC(tree,heap) * GTY ((skip (""))) mpt_table;
141 /* This represents the operand cache for a stmt. */
142 struct stmt_operands_d
144 /* Statement operands. */
145 struct def_optype_d * def_ops;
146 struct use_optype_d * use_ops;
148 /* Virtual operands (VDEF, VUSE). */
149 struct vdef_optype_d * vdef_ops;
150 struct vuse_optype_d * vuse_ops;
152 /* Sets of memory symbols loaded and stored. */
157 typedef struct stmt_operands_d *stmt_operands_p;
159 #define USE_FROM_PTR(PTR) get_use_from_ptr (PTR)
160 #define DEF_FROM_PTR(PTR) get_def_from_ptr (PTR)
161 #define SET_USE(USE, V) set_ssa_use_from_ptr (USE, V)
162 #define SET_DEF(DEF, V) ((*(DEF)) = (V))
164 #define USE_STMT(USE) (USE)->stmt
166 #define DEF_OPS(STMT) (stmt_ann (STMT)->operands.def_ops)
167 #define USE_OPS(STMT) (stmt_ann (STMT)->operands.use_ops)
168 #define VUSE_OPS(STMT) (stmt_ann (STMT)->operands.vuse_ops)
169 #define VDEF_OPS(STMT) (stmt_ann (STMT)->operands.vdef_ops)
171 #define LOADED_SYMS(STMT) (stmt_ann (STMT)->operands.loads)
172 #define STORED_SYMS(STMT) (stmt_ann (STMT)->operands.stores)
174 #define USE_OP_PTR(OP) (&((OP)->use_ptr))
175 #define USE_OP(OP) (USE_FROM_PTR (USE_OP_PTR (OP)))
177 #define DEF_OP_PTR(OP) ((OP)->def_ptr)
178 #define DEF_OP(OP) (DEF_FROM_PTR (DEF_OP_PTR (OP)))
180 #define VUSE_OP_PTR(OP,X) VUSE_ELEMENT_PTR ((OP)->usev, (X))
181 #define VUSE_OP(OP,X) VUSE_ELEMENT_VAR ((OP)->usev, (X))
182 #define SET_VUSE_OP(OP,X,N) SET_VUSE_ELEMENT_VAR ((OP)->usev, (X), (N))
183 #define VUSE_NUM(OP) VUSE_VECT_NUM_ELEM ((OP)->usev)
184 #define VUSE_VECT(OP) &((OP)->usev)
186 #define VDEF_RESULT_PTR(OP) (&((OP)->def_var))
187 #define VDEF_RESULT(OP) ((OP)->def_var)
188 #define VDEF_OP_PTR(OP,X) VUSE_OP_PTR (OP, X)
189 #define VDEF_OP(OP,X) VUSE_OP (OP, X)
190 #define SET_VDEF_OP(OP,X,N) SET_VUSE_OP (OP, X, N)
191 #define VDEF_NUM(OP) VUSE_VECT_NUM_ELEM ((OP)->usev)
192 #define VDEF_VECT(OP) &((OP)->usev)
194 #define PHI_RESULT_PTR(PHI) get_phi_result_ptr (PHI)
195 #define PHI_RESULT(PHI) DEF_FROM_PTR (PHI_RESULT_PTR (PHI))
196 #define SET_PHI_RESULT(PHI, V) SET_DEF (PHI_RESULT_PTR (PHI), (V))
198 #define PHI_ARG_DEF_PTR(PHI, I) get_phi_arg_def_ptr ((PHI), (I))
199 #define PHI_ARG_DEF(PHI, I) USE_FROM_PTR (PHI_ARG_DEF_PTR ((PHI), (I)))
200 #define SET_PHI_ARG_DEF(PHI, I, V) \
201 SET_USE (PHI_ARG_DEF_PTR ((PHI), (I)), (V))
202 #define PHI_ARG_DEF_FROM_EDGE(PHI, E) \
203 PHI_ARG_DEF ((PHI), (E)->dest_idx)
204 #define PHI_ARG_DEF_PTR_FROM_EDGE(PHI, E) \
205 PHI_ARG_DEF_PTR ((PHI), (E)->dest_idx)
206 #define PHI_ARG_INDEX_FROM_USE(USE) phi_arg_index_from_use (USE)
209 extern struct vdef_optype_d *realloc_vdef (struct vdef_optype_d *, int);
210 extern struct vuse_optype_d *realloc_vuse (struct vuse_optype_d *, int);
212 extern void init_ssa_operands (void);
213 extern void fini_ssa_operands (void);
214 extern void free_ssa_operands (stmt_operands_p);
215 extern void update_stmt_operands (tree);
216 extern bool verify_imm_links (FILE *f, tree var);
218 extern void copy_virtual_operands (tree, tree);
219 extern void create_ssa_artificial_load_stmt (tree, tree);
221 extern void dump_immediate_uses (FILE *file);
222 extern void dump_immediate_uses_for (FILE *file, tree var);
223 extern void debug_immediate_uses (void);
224 extern void debug_immediate_uses_for (tree var);
225 extern void dump_decl_set (FILE *, bitmap);
226 extern void debug_decl_set (bitmap);
228 extern bool ssa_operands_active (void);
230 extern void add_to_addressable_set (tree, bitmap *);
231 extern void push_stmt_changes (tree *);
232 extern void pop_stmt_changes (tree *);
233 extern void discard_stmt_changes (tree *);
235 enum ssa_op_iter_type {
236 ssa_op_iter_none = 0,
243 /* This structure is used in the operand iterator loops. It contains the
244 items required to determine which operand is retrieved next. During
245 optimization, this structure is scalarized, and any unused fields are
246 optimized away, resulting in little overhead. */
248 typedef struct ssa_operand_iterator_d
254 vdef_optype_p mayuses;
255 enum ssa_op_iter_type iter_type;
264 /* These flags are used to determine which operands are returned during
265 execution of the loop. */
266 #define SSA_OP_USE 0x01 /* Real USE operands. */
267 #define SSA_OP_DEF 0x02 /* Real DEF operands. */
268 #define SSA_OP_VUSE 0x04 /* VUSE operands. */
269 #define SSA_OP_VMAYUSE 0x08 /* USE portion of VDEFS. */
270 #define SSA_OP_VDEF 0x10 /* DEF portion of VDEFS. */
272 /* These are commonly grouped operand flags. */
273 #define SSA_OP_VIRTUAL_USES (SSA_OP_VUSE | SSA_OP_VMAYUSE)
274 #define SSA_OP_VIRTUAL_DEFS (SSA_OP_VDEF)
275 #define SSA_OP_ALL_VIRTUALS (SSA_OP_VIRTUAL_USES | SSA_OP_VIRTUAL_DEFS)
276 #define SSA_OP_ALL_USES (SSA_OP_VIRTUAL_USES | SSA_OP_USE)
277 #define SSA_OP_ALL_DEFS (SSA_OP_VIRTUAL_DEFS | SSA_OP_DEF)
278 #define SSA_OP_ALL_OPERANDS (SSA_OP_ALL_USES | SSA_OP_ALL_DEFS)
280 /* This macro executes a loop over the operands of STMT specified in FLAG,
281 returning each operand as a 'tree' in the variable TREEVAR. ITER is an
282 ssa_op_iter structure used to control the loop. */
283 #define FOR_EACH_SSA_TREE_OPERAND(TREEVAR, STMT, ITER, FLAGS) \
284 for (TREEVAR = op_iter_init_tree (&(ITER), STMT, FLAGS); \
285 !op_iter_done (&(ITER)); \
286 TREEVAR = op_iter_next_tree (&(ITER)))
288 /* This macro executes a loop over the operands of STMT specified in FLAG,
289 returning each operand as a 'use_operand_p' in the variable USEVAR.
290 ITER is an ssa_op_iter structure used to control the loop. */
291 #define FOR_EACH_SSA_USE_OPERAND(USEVAR, STMT, ITER, FLAGS) \
292 for (USEVAR = op_iter_init_use (&(ITER), STMT, FLAGS); \
293 !op_iter_done (&(ITER)); \
294 USEVAR = op_iter_next_use (&(ITER)))
296 /* This macro executes a loop over the operands of STMT specified in FLAG,
297 returning each operand as a 'def_operand_p' in the variable DEFVAR.
298 ITER is an ssa_op_iter structure used to control the loop. */
299 #define FOR_EACH_SSA_DEF_OPERAND(DEFVAR, STMT, ITER, FLAGS) \
300 for (DEFVAR = op_iter_init_def (&(ITER), STMT, FLAGS); \
301 !op_iter_done (&(ITER)); \
302 DEFVAR = op_iter_next_def (&(ITER)))
304 /* This macro executes a loop over the VDEF operands of STMT. The def
305 and use for each VDEF is returned in DEFVAR and USEVAR.
306 ITER is an ssa_op_iter structure used to control the loop. */
307 #define FOR_EACH_SSA_VDEF_OPERAND(DEFVAR, USEVAR, STMT, ITER) \
308 for (op_iter_init_vdef (&(ITER), STMT, &(USEVAR), &(DEFVAR)); \
309 !op_iter_done (&(ITER)); \
310 op_iter_next_vdef (&(USEVAR), &(DEFVAR), &(ITER)))
312 /* This macro will execute a loop over all the arguments of a PHI which
313 match FLAGS. A use_operand_p is always returned via USEVAR. FLAGS
314 can be either SSA_OP_USE or SSA_OP_VIRTUAL_USES or SSA_OP_ALL_USES. */
315 #define FOR_EACH_PHI_ARG(USEVAR, STMT, ITER, FLAGS) \
316 for ((USEVAR) = op_iter_init_phiuse (&(ITER), STMT, FLAGS); \
317 !op_iter_done (&(ITER)); \
318 (USEVAR) = op_iter_next_use (&(ITER)))
321 /* This macro will execute a loop over a stmt, regardless of whether it is
322 a real stmt or a PHI node, looking at the USE nodes matching FLAGS. */
323 #define FOR_EACH_PHI_OR_STMT_USE(USEVAR, STMT, ITER, FLAGS) \
324 for ((USEVAR) = (TREE_CODE (STMT) == PHI_NODE \
325 ? op_iter_init_phiuse (&(ITER), STMT, FLAGS) \
326 : op_iter_init_use (&(ITER), STMT, FLAGS)); \
327 !op_iter_done (&(ITER)); \
328 (USEVAR) = op_iter_next_use (&(ITER)))
330 /* This macro will execute a loop over a stmt, regardless of whether it is
331 a real stmt or a PHI node, looking at the DEF nodes matching FLAGS. */
332 #define FOR_EACH_PHI_OR_STMT_DEF(DEFVAR, STMT, ITER, FLAGS) \
333 for ((DEFVAR) = (TREE_CODE (STMT) == PHI_NODE \
334 ? op_iter_init_phidef (&(ITER), STMT, FLAGS) \
335 : op_iter_init_def (&(ITER), STMT, FLAGS)); \
336 !op_iter_done (&(ITER)); \
337 (DEFVAR) = op_iter_next_def (&(ITER)))
339 /* This macro returns an operand in STMT as a tree if it is the ONLY
340 operand matching FLAGS. If there are 0 or more than 1 operand matching
341 FLAGS, then NULL_TREE is returned. */
342 #define SINGLE_SSA_TREE_OPERAND(STMT, FLAGS) \
343 single_ssa_tree_operand (STMT, FLAGS)
345 /* This macro returns an operand in STMT as a use_operand_p if it is the ONLY
346 operand matching FLAGS. If there are 0 or more than 1 operand matching
347 FLAGS, then NULL_USE_OPERAND_P is returned. */
348 #define SINGLE_SSA_USE_OPERAND(STMT, FLAGS) \
349 single_ssa_use_operand (STMT, FLAGS)
351 /* This macro returns an operand in STMT as a def_operand_p if it is the ONLY
352 operand matching FLAGS. If there are 0 or more than 1 operand matching
353 FLAGS, then NULL_DEF_OPERAND_P is returned. */
354 #define SINGLE_SSA_DEF_OPERAND(STMT, FLAGS) \
355 single_ssa_def_operand (STMT, FLAGS)
357 /* This macro returns TRUE if there are no operands matching FLAGS in STMT. */
358 #define ZERO_SSA_OPERANDS(STMT, FLAGS) zero_ssa_operands (STMT, FLAGS)
360 /* This macro counts the number of operands in STMT matching FLAGS. */
361 #define NUM_SSA_OPERANDS(STMT, FLAGS) num_ssa_operands (STMT, FLAGS)
363 extern tree get_mpt_for (tree);
364 extern void dump_memory_partitions (FILE *);
365 extern void debug_memory_partitions (void);
367 #endif /* GCC_TREE_SSA_OPERANDS_H */