gcc/resource.h

   1 /* Definitions for computing resource usage of specific insns.
   2    Copyright (C) 1999, 2003 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 2, 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 COPYING.  If not, write to the Free
  18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 /* Macro to clear all resources.  */
  22 #define CLEAR_RESOURCE(RES)     \
  23  do { (RES)->memory = (RES)->unch_memory = (RES)->volatil = (RES)->cc = 0; \
  24       CLEAR_HARD_REG_SET ((RES)->regs); } while (0)
  25
  26 /* The resources used by a given insn.  */
  27 struct resources
  28 {
  29   char memory;          /* Insn sets or needs a memory location.  */
  30   char unch_memory;     /* Insn sets of needs a "unchanging" MEM.  */
  31   char volatil;         /* Insn sets or needs a volatile memory loc.  */
  32   char cc;              /* Insn sets or needs the condition codes.  */
  33   HARD_REG_SET regs;    /* Which registers are set or needed.  */
  34 };
  35
  36 /* The kinds of rtl mark_*_resources will consider */
  37 enum mark_resource_type
  38 {
  39   MARK_SRC_DEST = 0,
  40   MARK_SRC_DEST_CALL = 1,
  41   MARK_DEST = 2
  42 };
  43
  44 extern void mark_target_live_regs (rtx, rtx, struct resources *);
  45 extern void mark_set_resources (rtx, struct resources *, int,
  46                                 enum mark_resource_type);
  47 extern void mark_referenced_resources (rtx, struct resources *, int);
  48 extern void clear_hashed_info_for_insn (rtx);
  49 extern void incr_ticks_for_insn (rtx);
  50 extern void mark_end_of_function_resources (rtx, int);
  51 extern void init_resource_info (rtx);
  52 extern void free_resource_info (void);