resource.h

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/* Definitions for computing resource usage of specific insns.
   Copyright (C) 1999-2026 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_RESOURCE_H
#define GCC_RESOURCE_H
 
/* Macro to clear all resources.  */
#define CLEAR_RESOURCE(RES)     \
 do { (RES)->memory = (RES)->volatil = (RES)->cc = 0; \
      CLEAR_HARD_REG_SET ((RES)->regs); } while (0)
 
/* The resources used by a given insn.  */
struct resources
{
  char memory;          /* Insn sets or needs a memory location.  */
  char volatil;         /* Insn sets or needs a volatile memory loc.  */
  char cc;              /* Insn sets or needs the condition codes.  */
  HARD_REG_SET regs;    /* Which registers are set or needed.  */
};
 
/* The kinds of rtl mark_*_resources will consider */
enum mark_resource_type
{
  MARK_SRC_DEST = 0,
  MARK_SRC_DEST_CALL = 1
};
 
extern void mark_target_live_regs (rtx_insn *, rtx, struct resources *);
extern void mark_set_resources (rtx, struct resources *, int,
                                enum mark_resource_type);
extern void mark_referenced_resources (rtx, struct resources *, bool);
extern void clear_hashed_info_for_insn (rtx_insn *);
extern void clear_hashed_info_until_next_barrier (rtx_insn *);
extern void incr_ticks_for_insn (rtx_insn *);
extern void mark_end_of_function_resources (rtx, bool);
extern void init_resource_info (rtx_insn *);
extern void free_resource_info (void);
 
#endif /* GCC_RESOURCE_H */