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 extern void mark_target_live_regs       PROTO((rtx, rtx, struct resources *));
  37 extern void mark_set_resources          PROTO((rtx, struct resources *, int,
  38                                                int));
  39 extern void mark_referenced_resources   PROTO((rtx, struct resources *, int));
  40 extern void clear_hashed_info_for_insn  PROTO((rtx));
  41 extern void incr_ticks_for_insn         PROTO((rtx));
  42 extern void mark_end_of_function_resources PROTO ((rtx, int));
  43 extern void init_resource_info          PROTO((rtx));
  44 extern void free_resource_info          PROTO((void));
  45 extern rtx find_free_register           PROTO((rtx, rtx, const char *, int,
  46                                                HARD_REG_SET *));
  47 extern int reg_dead_p                   PROTO((rtx, rtx));