tree-ssa-operands.h

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/* SSA operand management for trees.
   Copyright (C) 2003-2024 Free Software Foundation, Inc.
 
This file is part of GCC.
 
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
 
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.
 
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */
 
#ifndef GCC_TREE_SSA_OPERANDS_H
#define GCC_TREE_SSA_OPERANDS_H
 
/* Interface to SSA operands.  */
 
 
/* This represents a pointer to a DEF operand.  */
typedef tree *def_operand_p;
 
/* This represents a pointer to a USE operand.  */
typedef ssa_use_operand_t *use_operand_p;
 
/* NULL operand types.  */
#define NULL_USE_OPERAND_P              ((use_operand_p)NULL)
#define NULL_DEF_OPERAND_P              ((def_operand_p)NULL)
 
/* This represents the USE operands of a stmt.  */
struct use_optype_d
{
  struct use_optype_d *next;
  struct ssa_use_operand_t use_ptr;
};
typedef struct use_optype_d *use_optype_p;
 
/* This structure represents a variable sized buffer which is allocated by the
   operand memory manager.  Operands are suballocated out of this block.  The
   MEM array varies in size.  */
 
struct GTY((chain_next("%h.next"))) ssa_operand_memory_d {
  struct ssa_operand_memory_d *next;
  char mem[1];
};
 
/* Per-function operand caches.  */
struct GTY(()) ssa_operands {
   struct ssa_operand_memory_d *operand_memory;
   unsigned operand_memory_index;
   /* Current size of the operand memory buffer.  */
   unsigned int ssa_operand_mem_size;
 
   bool ops_active;
 
   struct use_optype_d * GTY ((skip (""))) free_uses;
};
 
#define USE_FROM_PTR(PTR)       get_use_from_ptr (PTR)
#define DEF_FROM_PTR(PTR)       get_def_from_ptr (PTR)
#define SET_USE(USE, V)         set_ssa_use_from_ptr (USE, V)
#define SET_DEF(DEF, V)         ((*(DEF)) = (V))
 
#define USE_STMT(USE)           (USE)->loc.stmt
 
#define USE_OP_PTR(OP)          (&((OP)->use_ptr))
#define USE_OP(OP)              (USE_FROM_PTR (USE_OP_PTR (OP)))
 
#define PHI_RESULT_PTR(PHI)     gimple_phi_result_ptr (PHI)
#define PHI_RESULT(PHI)         DEF_FROM_PTR (PHI_RESULT_PTR (PHI))
#define SET_PHI_RESULT(PHI, V)  SET_DEF (PHI_RESULT_PTR (PHI), (V))
/*
#define PHI_ARG_DEF(PHI, I)     USE_FROM_PTR (PHI_ARG_DEF_PTR ((PHI), (I)))
*/
#define PHI_ARG_DEF_PTR(PHI, I) gimple_phi_arg_imm_use_ptr ((PHI), (I))
#define PHI_ARG_DEF(PHI, I)     gimple_phi_arg_def ((PHI), (I))
#define SET_PHI_ARG_DEF(PHI, I, V)                                      \
                                SET_USE (PHI_ARG_DEF_PTR ((PHI), (I)), (V))
#define SET_PHI_ARG_DEF_ON_EDGE(PHI, E, V)                                    \
                                SET_USE (gimple_phi_arg_imm_use_ptr_from_edge \
                                           ((PHI), (E)), (V))
#define PHI_ARG_DEF_FROM_EDGE(PHI, E)                                   \
                                gimple_phi_arg_def_from_edge ((PHI), (E))
#define PHI_ARG_DEF_PTR_FROM_EDGE(PHI, E)                               \
                                gimple_phi_arg_imm_use_ptr_from_edge ((PHI), (E))
#define PHI_ARG_INDEX_FROM_USE(USE)   phi_arg_index_from_use (USE)
 
 
extern bool ssa_operands_active (struct function *);
extern void init_ssa_operands (struct function *fn);
extern void fini_ssa_operands (struct function *);
extern bool verify_ssa_operands (struct function *, gimple *stmt);
extern void free_stmt_operands (struct function *, gimple *);
extern void update_stmt_operands (struct function *, gimple *);
extern void swap_ssa_operands (gimple *, tree *, tree *);
extern bool verify_imm_links (FILE *f, tree var);
 
extern void dump_immediate_uses_for (FILE *file, tree var);
extern void dump_immediate_uses (FILE *file);
extern void debug_immediate_uses (void);
extern void debug_immediate_uses_for (tree var);
 
extern void unlink_stmt_vdef (gimple *);
 
/* Return the tree pointed-to by USE.  */
inline tree
get_use_from_ptr (use_operand_p use)
{
  return *(use->use);
}
 
/* Return the tree pointed-to by DEF.  */
inline tree
get_def_from_ptr (def_operand_p def)
{
  return *def;
}
 
#endif  /* GCC_TREE_SSA_OPERANDS_H  */