gcc/resource.h

   1 /* Definitions for computing resource usage of specific insns.
   2    Copyright (C) 1999 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 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       PARAMS ((rtx, rtx, struct resources *));
  45 extern void mark_set_resources          PARAMS ((rtx, struct resources *, int,
  46                                                enum mark_resource_type));
  47 extern void mark_referenced_resources   PARAMS ((rtx, struct resources *, int));
  48 extern void clear_hashed_info_for_insn  PARAMS ((rtx));
  49 extern void incr_ticks_for_insn         PARAMS ((rtx));
  50 extern void mark_end_of_function_resources PARAMS ((rtx, int));
  51 extern void init_resource_info          PARAMS ((rtx));
  52 extern void free_resource_info          PARAMS ((void));