gcc/ira.h

   1 /* Communication between the Integrated Register Allocator and rest of
   2    the compiler.
   3    Copyright (C) 2006, 2007, 2008
   4    Free Software Foundation, Inc.
   5    Contributed by Vladimir Makarov <vmakarov@redhat.com>.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING.  If not, write to the Free
  21 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  22 02110-1301, USA.  */
  23
  24
  25 /* If secondary reloads are the same for inputs and outputs, define those
  26    macros here.  */
  27
  28 #ifdef SECONDARY_RELOAD_CLASS
  29 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
  30   SECONDARY_RELOAD_CLASS (CLASS, MODE, X)
  31 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
  32   SECONDARY_RELOAD_CLASS (CLASS, MODE, X)
  33 #endif
  34
  35 /* If either macro is defined, show that we need secondary reloads.  */
  36 #if defined(SECONDARY_INPUT_RELOAD_CLASS) || defined(SECONDARY_OUTPUT_RELOAD_CLASS)
  37 #define HAVE_SECONDARY_RELOADS
  38 #endif
  39
  40 /* If MEMORY_MOVE_COST isn't defined, give it a default here.  */
  41 #ifndef MEMORY_MOVE_COST
  42 #ifdef HAVE_SECONDARY_RELOADS
  43 #define MEMORY_MOVE_COST(MODE,CLASS,IN) \
  44   (4 + memory_move_secondary_cost ((MODE), (CLASS), (IN)))
  45 #else
  46 #define MEMORY_MOVE_COST(MODE,CLASS,IN) 4
  47 #endif
  48 #endif
  49
  50 extern GTY (()) struct varray_head_tag *reg_equiv_memory_loc_varray;
  51 extern rtx *reg_equiv_constant;
  52 extern rtx *reg_equiv_memory_loc;
  53 extern rtx *reg_equiv_address;
  54 extern rtx *reg_equiv_mem;
  55
  56 extern void init_ira_once (void);
  57 extern void init_ira (void);
  58 extern void finish_ira_once (void);
  59 extern rtx ira_eliminate_regs (rtx, enum machine_mode);
  60 extern void sort_insn_chain (int);
  61
  62 extern void ira (FILE *);
  63 extern void sort_regnos_for_alter_reg (int *, int);
  64 extern void mark_allocation_change (int);
  65 extern void mark_memory_move_deletion (int, int);
  66 extern int reassign_pseudos (int *, int, HARD_REG_SET, HARD_REG_SET *,
  67                              HARD_REG_SET *, bitmap);
  68 extern rtx reuse_stack_slot (int, unsigned int, unsigned int);
  69 extern void mark_new_stack_slot (rtx, int, unsigned int);
  70 extern int better_spill_reload_regno_p (int *, int *, rtx, rtx, rtx);
  71 extern void collect_pseudo_call_clobbered_regs (int, HARD_REG_SET *);
  72