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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/ira.h
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+/* 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 <vmakarov@redhat.com>.
+
+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
+<http://www.gnu.org/licenses/>. */
+
+/* Function specific hard registers can not be used for the register
+ allocation. */
+extern HARD_REG_SET ira_no_alloc_regs;
+
+/* 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 -> cover 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_cover_class[FIRST_PSEUDO_REGISTER];
+
+ /* Number of cover classes. Cover classes is non-intersected register
+ classes containing all hard-registers available for the
+ allocation. */
+ int x_ira_reg_class_cover_size;
+
+ /* The array containing cover classes (see also comments for macro
+ IRA_COVER_CLASSES;. Only first IRA_REG_CLASS_COVER_SIZE elements are
+ used for this. */
+ enum reg_class x_ira_reg_class_cover[N_REG_CLASSES];
+
+ /* Map of all register classes to corresponding cover class containing
+ the given class. If given class is not a subset of a cover class,
+ we translate it into the cheapest cover class. */
+ enum reg_class x_ira_class_translate[N_REG_CLASSES];
+
+ /* Map: register class x machine mode -> number of hard registers of
+ given class needed to store value of given mode. If the number for
+ some hard-registers of the register class is different, the size
+ will be negative. */
+ int x_ira_reg_class_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];
+};
+
+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_cover_class \
+ (this_target_ira->x_ira_hard_regno_cover_class)
+#define ira_reg_class_cover_size \
+ (this_target_ira->x_ira_reg_class_cover_size)
+#define ira_reg_class_cover \
+ (this_target_ira->x_ira_reg_class_cover)
+#define ira_class_translate \
+ (this_target_ira->x_ira_class_translate)
+#define ira_reg_class_nregs \
+ (this_target_ira->x_ira_reg_class_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)
+
+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);