gcc/resource.h

   1 /* Definitions for computing resource usage of specific insns.
   2    Copyright (C) 1999, 2003, 2004, 2006, 2007 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 3, 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 COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_RESOURCE_H
  21 #define GCC_RESOURCE_H
  22
  23 #include "hard-reg-set.h"
  24 #include "df.h"
  25
  26 /* Macro to clear all resources.  */
  27 #define CLEAR_RESOURCE(RES)     \
  28  do { (RES)->memory = (RES)->unch_memory = (RES)->volatil = (RES)->cc = 0; \
  29       CLEAR_HARD_REG_SET ((RES)->regs); } while (0)
  30
  31 /* The resources used by a given insn.  */
  32 struct resources
  33 {
  34   char memory;          /* Insn sets or needs a memory location.  */
  35   char unch_memory;     /* Insn sets of needs a "unchanging" MEM.  */
  36   char volatil;         /* Insn sets or needs a volatile memory loc.  */
  37   char cc;              /* Insn sets or needs the condition codes.  */
  38   HARD_REG_SET regs;    /* Which registers are set or needed.  */
  39 };
  40
  41 /* The kinds of rtl mark_*_resources will consider */
  42 enum mark_resource_type
  43 {
  44   MARK_SRC_DEST = 0,
  45   MARK_SRC_DEST_CALL = 1
  46 };
  47
  48 extern void mark_target_live_regs (rtx, rtx, struct resources *);
  49 extern void mark_set_resources (rtx, struct resources *, int,
  50                                 enum mark_resource_type);
  51 extern void mark_referenced_resources (rtx, struct resources *, int);
  52 extern void clear_hashed_info_for_insn (rtx);
  53 extern void incr_ticks_for_insn (rtx);
  54 extern void mark_end_of_function_resources (rtx, int);
  55 extern void init_resource_info (rtx);
  56 extern void free_resource_info (void);
  57
  58 #endif /* GCC_RESOURCE_H */