contrib/gcc-4.7/gcc/resource.h

   1 /* Definitions for computing resource usage of specific insns.
   2    Copyright (C) 1999, 2003, 2004, 2006, 2007, 2009, 2010
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_RESOURCE_H
  22 #define GCC_RESOURCE_H
  23
  24 #include "hard-reg-set.h"
  25 #include "df.h"
  26
  27 /* Macro to clear all resources.  */
  28 #define CLEAR_RESOURCE(RES)     \
  29  do { (RES)->memory = (RES)->unch_memory = (RES)->volatil = (RES)->cc = 0; \
  30       CLEAR_HARD_REG_SET ((RES)->regs); } while (0)
  31
  32 /* The resources used by a given insn.  */
  33 struct resources
  34 {
  35   char memory;          /* Insn sets or needs a memory location.  */
  36   char unch_memory;     /* Insn sets or needs an "unchanging" MEM.  */
  37   char volatil;         /* Insn sets or needs a volatile memory loc.  */
  38   char cc;              /* Insn sets or needs the condition codes.  */
  39   HARD_REG_SET regs;    /* Which registers are set or needed.  */
  40 };
  41
  42 /* The kinds of rtl mark_*_resources will consider */
  43 enum mark_resource_type
  44 {
  45   MARK_SRC_DEST = 0,
  46   MARK_SRC_DEST_CALL = 1
  47 };
  48
  49 extern void mark_target_live_regs (rtx, rtx, struct resources *);
  50 extern void mark_set_resources (rtx, struct resources *, int,
  51                                 enum mark_resource_type);
  52 extern void mark_referenced_resources (rtx, struct resources *, bool);
  53 extern void clear_hashed_info_for_insn (rtx);
  54 extern void incr_ticks_for_insn (rtx);
  55 extern void mark_end_of_function_resources (rtx, bool);
  56 extern void init_resource_info (rtx);
  57 extern void free_resource_info (void);
  58
  59 #endif /* GCC_RESOURCE_H */