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