gcc/tree-ssa-operands.h

   1 /* SSA operand management for trees.
   2    Copyright (C) 2003-2017 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   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 3, or (at your option) any later
   9 version.
  10
  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
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_TREE_SSA_OPERANDS_H
  21 #define GCC_TREE_SSA_OPERANDS_H
  22
  23 /* Interface to SSA operands.  */
  24
  25
  26 /* This represents a pointer to a DEF operand.  */
  27 typedef tree *def_operand_p;
  28
  29 /* This represents a pointer to a USE operand.  */
  30 typedef ssa_use_operand_t *use_operand_p;
  31
  32 /* NULL operand types.  */
  33 #define NULL_USE_OPERAND_P              ((use_operand_p)NULL)
  34 #define NULL_DEF_OPERAND_P              ((def_operand_p)NULL)
  35
  36 /* This represents the USE operands of a stmt.  */
  37 struct use_optype_d
  38 {
  39   struct use_optype_d *next;
  40   struct ssa_use_operand_t use_ptr;
  41 };
  42 typedef struct use_optype_d *use_optype_p;
  43
  44 /* This structure represents a variable sized buffer which is allocated by the
  45    operand memory manager.  Operands are suballocated out of this block.  The
  46    MEM array varies in size.  */
  47
  48 struct GTY((chain_next("%h.next"))) ssa_operand_memory_d {
  49   struct ssa_operand_memory_d *next;
  50   char mem[1];
  51 };
  52
  53 /* Per-function operand caches.  */
  54 struct GTY(()) ssa_operands {
  55    struct ssa_operand_memory_d *operand_memory;
  56    unsigned operand_memory_index;
  57    /* Current size of the operand memory buffer.  */
  58    unsigned int ssa_operand_mem_size;
  59
  60    bool ops_active;
  61
  62    struct use_optype_d * GTY ((skip (""))) free_uses;
  63 };
  64
  65 #define USE_FROM_PTR(PTR)       get_use_from_ptr (PTR)
  66 #define DEF_FROM_PTR(PTR)       get_def_from_ptr (PTR)
  67 #define SET_USE(USE, V)         set_ssa_use_from_ptr (USE, V)
  68 #define SET_DEF(DEF, V)         ((*(DEF)) = (V))
  69
  70 #define USE_STMT(USE)           (USE)->loc.stmt
  71
  72 #define USE_OP_PTR(OP)          (&((OP)->use_ptr))
  73 #define USE_OP(OP)              (USE_FROM_PTR (USE_OP_PTR (OP)))
  74
  75 #define PHI_RESULT_PTR(PHI)     gimple_phi_result_ptr (PHI)
  76 #define PHI_RESULT(PHI)         DEF_FROM_PTR (PHI_RESULT_PTR (PHI))
  77 #define SET_PHI_RESULT(PHI, V)  SET_DEF (PHI_RESULT_PTR (PHI), (V))
  78 /*
  79 #define PHI_ARG_DEF(PHI, I)     USE_FROM_PTR (PHI_ARG_DEF_PTR ((PHI), (I)))
  80 */
  81 #define PHI_ARG_DEF_PTR(PHI, I) gimple_phi_arg_imm_use_ptr ((PHI), (I))
  82 #define PHI_ARG_DEF(PHI, I)     gimple_phi_arg_def ((PHI), (I))
  83 #define SET_PHI_ARG_DEF(PHI, I, V)                                      \
  84                                 SET_USE (PHI_ARG_DEF_PTR ((PHI), (I)), (V))
  85 #define PHI_ARG_DEF_FROM_EDGE(PHI, E)                                   \
  86                                 PHI_ARG_DEF ((PHI), (E)->dest_idx)
  87 #define PHI_ARG_DEF_PTR_FROM_EDGE(PHI, E)                               \
  88                                 PHI_ARG_DEF_PTR ((PHI), (E)->dest_idx)
  89 #define PHI_ARG_INDEX_FROM_USE(USE)   phi_arg_index_from_use (USE)
  90
  91
  92 extern bool ssa_operands_active (struct function *);
  93 extern void init_ssa_operands (struct function *fn);
  94 extern void fini_ssa_operands (struct function *);
  95 extern bool verify_ssa_operands (struct function *, gimple *stmt);
  96 extern void free_stmt_operands (struct function *, gimple *);
  97 extern void update_stmt_operands (struct function *, gimple *);
  98 extern void swap_ssa_operands (gimple *, tree *, tree *);
  99 extern bool verify_imm_links (FILE *f, tree var);
 100
 101 extern void dump_immediate_uses_for (FILE *file, tree var);
 102 extern void dump_immediate_uses (FILE *file);
 103 extern void debug_immediate_uses (void);
 104 extern void debug_immediate_uses_for (tree var);
 105
 106 extern void unlink_stmt_vdef (gimple *);
 107
 108 /* Return the tree pointed-to by USE.  */
 109 static inline tree
 110 get_use_from_ptr (use_operand_p use)
 111 {
 112   return *(use->use);
 113 }
 114
 115 /* Return the tree pointed-to by DEF.  */
 116 static inline tree
 117 get_def_from_ptr (def_operand_p def)
 118 {
 119   return *def;
 120 }
 121
 122 #endif  /* GCC_TREE_SSA_OPERANDS_H  */