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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ira.h] - Blame information for rev 684

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1 684 jeremybenn
/* Communication between the Integrated Register Allocator (IRA) and
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   the rest of the compiler.
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   Copyright (C) 2006, 2007, 2008, 2009, 2010
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   Free Software Foundation, Inc.
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   Contributed by Vladimir Makarov <vmakarov@redhat.com>.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3.  If not see
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<http://www.gnu.org/licenses/>.  */
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/* True if we have allocno conflicts.  It is false for non-optimized
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   mode or when the conflict table is too big.  */
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extern bool ira_conflicts_p;
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struct target_ira {
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  /* Number of given class hard registers available for the register
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     allocation for given classes.  */
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  int x_ira_available_class_regs[N_REG_CLASSES];
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  /* Map: hard register number -> allocno class it belongs to.  If the
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     corresponding class is NO_REGS, the hard register is not available
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     for allocation.  */
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  enum reg_class x_ira_hard_regno_allocno_class[FIRST_PSEUDO_REGISTER];
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  /* Number of allocno classes.  Allocno classes are register classes
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     which can be used for allocations of allocnos.  */
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  int x_ira_allocno_classes_num;
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  /* The array containing allocno classes.  Only first
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     IRA_ALLOCNO_CLASSES_NUM elements are used for this.  */
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  enum reg_class x_ira_allocno_classes[N_REG_CLASSES];
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  /* Map of all register classes to corresponding allocno classes
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     containing the given class.  If given class is not a subset of an
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     allocno class, we translate it into the cheapest allocno class.  */
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  enum reg_class x_ira_allocno_class_translate[N_REG_CLASSES];
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  /* Number of pressure classes.  Pressure classes are register
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     classes for which we calculate register pressure.  */
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  int x_ira_pressure_classes_num;
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  /* The array containing pressure classes.  Only first
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     IRA_PRESSURE_CLASSES_NUM elements are used for this.  */
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  enum reg_class x_ira_pressure_classes[N_REG_CLASSES];
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  /* Map of all register classes to corresponding pressure classes
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     containing the given class.  If given class is not a subset of an
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     pressure class, we translate it into the cheapest pressure
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     class.  */
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  enum reg_class x_ira_pressure_class_translate[N_REG_CLASSES];
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  /* Bigest pressure register class containing stack registers.
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     NO_REGS if there are no stack registers.  */
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  enum reg_class x_ira_stack_reg_pressure_class;
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  /* Maps: register class x machine mode -> maximal/minimal number of
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     hard registers of given class needed to store value of given
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     mode.  */
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  unsigned char x_ira_reg_class_max_nregs[N_REG_CLASSES][MAX_MACHINE_MODE];
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  unsigned char x_ira_reg_class_min_nregs[N_REG_CLASSES][MAX_MACHINE_MODE];
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  /* Array analogous to target hook TARGET_MEMORY_MOVE_COST.  */
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  short x_ira_memory_move_cost[MAX_MACHINE_MODE][N_REG_CLASSES][2];
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  /* Array of number of hard registers of given class which are
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     available for the allocation.  The order is defined by the
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     allocation order.  */
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  short x_ira_class_hard_regs[N_REG_CLASSES][FIRST_PSEUDO_REGISTER];
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  /* The number of elements of the above array for given register
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     class.  */
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  int x_ira_class_hard_regs_num[N_REG_CLASSES];
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  /* Function specific hard registers can not be used for the register
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     allocation.  */
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  HARD_REG_SET x_ira_no_alloc_regs;
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};
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extern struct target_ira default_target_ira;
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#if SWITCHABLE_TARGET
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extern struct target_ira *this_target_ira;
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#else
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#define this_target_ira (&default_target_ira)
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#endif
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#define ira_available_class_regs \
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  (this_target_ira->x_ira_available_class_regs)
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#define ira_hard_regno_allocno_class \
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  (this_target_ira->x_ira_hard_regno_allocno_class)
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#define ira_allocno_classes_num \
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  (this_target_ira->x_ira_allocno_classes_num)
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#define ira_allocno_classes \
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  (this_target_ira->x_ira_allocno_classes)
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#define ira_allocno_class_translate \
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  (this_target_ira->x_ira_allocno_class_translate)
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#define ira_pressure_classes_num \
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  (this_target_ira->x_ira_pressure_classes_num)
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#define ira_pressure_classes \
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  (this_target_ira->x_ira_pressure_classes)
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#define ira_pressure_class_translate \
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  (this_target_ira->x_ira_pressure_class_translate)
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#define ira_stack_reg_pressure_class \
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  (this_target_ira->x_ira_stack_reg_pressure_class)
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#define ira_reg_class_max_nregs \
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  (this_target_ira->x_ira_reg_class_max_nregs)
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#define ira_reg_class_min_nregs \
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  (this_target_ira->x_ira_reg_class_min_nregs)
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#define ira_memory_move_cost \
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  (this_target_ira->x_ira_memory_move_cost)
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#define ira_class_hard_regs \
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  (this_target_ira->x_ira_class_hard_regs)
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#define ira_class_hard_regs_num \
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  (this_target_ira->x_ira_class_hard_regs_num)
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#define ira_no_alloc_regs \
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  (this_target_ira->x_ira_no_alloc_regs)
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extern void ira_init_once (void);
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extern void ira_init (void);
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extern void ira_finish_once (void);
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extern void ira_setup_eliminable_regset (void);
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extern rtx ira_eliminate_regs (rtx, enum machine_mode);
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extern void ira_set_pseudo_classes (FILE *);
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extern void ira_implicitly_set_insn_hard_regs (HARD_REG_SET *);
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extern void ira_sort_regnos_for_alter_reg (int *, int, unsigned int *);
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extern void ira_mark_allocation_change (int);
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extern void ira_mark_memory_move_deletion (int, int);
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extern bool ira_reassign_pseudos (int *, int, HARD_REG_SET, HARD_REG_SET *,
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                                  HARD_REG_SET *, bitmap);
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extern rtx ira_reuse_stack_slot (int, unsigned int, unsigned int);
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extern void ira_mark_new_stack_slot (rtx, int, unsigned int);
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extern bool ira_better_spill_reload_regno_p (int *, int *, rtx, rtx, rtx);
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extern bool ira_bad_reload_regno (int, rtx, rtx);
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extern void ira_adjust_equiv_reg_cost (unsigned, int);

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