/* Define some standard sets of registers. */
/* Indexed by hard register number, contains 1 for registers
- that are fixed use (stack pointer, pc, frame pointer, etc.).
- These are the registers that cannot be used to allocate
- a pseudo reg whose life does not cross calls. */
-
-extern char fixed_regs[FIRST_PSEUDO_REGISTER];
-
-/* The same info as a HARD_REG_SET. */
-
-extern HARD_REG_SET fixed_reg_set;
-
-/* Indexed by hard register number, contains 1 for registers
- that are fixed use or are clobbered by function calls.
- These are the registers that cannot be used to allocate
- a pseudo reg whose life crosses calls. */
-
-extern char call_used_regs[FIRST_PSEUDO_REGISTER];
-
-#ifdef CALL_REALLY_USED_REGISTERS
-extern char call_really_used_regs[];
-#endif
-
-/* The same info as a HARD_REG_SET. */
-
-extern HARD_REG_SET call_used_reg_set;
-
-/* Contains registers that are fixed use -- i.e. in fixed_reg_set -- or
- a function value return register or TARGET_STRUCT_VALUE_RTX or
- STATIC_CHAIN_REGNUM. These are the registers that cannot hold quantities
- across calls even if we are willing to save and restore them. */
-
-extern HARD_REG_SET call_fixed_reg_set;
-
-/* Indexed by hard register number, contains 1 for registers
that are being used for global register decls.
These must be exempt from ordinary flow analysis
and are also considered fixed. */
extern char global_regs[FIRST_PSEUDO_REGISTER];
-/* Contains 1 for registers that are set or clobbered by calls. */
-/* ??? Ideally, this would be just call_used_regs plus global_regs, but
- for someone's bright idea to have call_used_regs strictly include
- fixed_regs. Which leaves us guessing as to the set of fixed_regs
- that are actually preserved. We know for sure that those associated
- with the local stack frame are safe, but scant others. */
+struct target_hard_regs {
+ /* Indexed by hard register number, contains 1 for registers
+ that are fixed use (stack pointer, pc, frame pointer, etc.;.
+ These are the registers that cannot be used to allocate
+ a pseudo reg whose life does not cross calls. */
+ char x_fixed_regs[FIRST_PSEUDO_REGISTER];
-extern HARD_REG_SET regs_invalidated_by_call;
+ /* The same info as a HARD_REG_SET. */
+ HARD_REG_SET x_fixed_reg_set;
-/* Call used hard registers which can not be saved because there is no
- insn for this. */
+ /* Indexed by hard register number, contains 1 for registers
+ that are fixed use or are clobbered by function calls.
+ These are the registers that cannot be used to allocate
+ a pseudo reg whose life crosses calls. */
+ char x_call_used_regs[FIRST_PSEUDO_REGISTER];
-extern HARD_REG_SET no_caller_save_reg_set;
+ char x_call_really_used_regs[FIRST_PSEUDO_REGISTER];
-#ifdef REG_ALLOC_ORDER
-/* Table of register numbers in the order in which to try to use them. */
+ /* The same info as a HARD_REG_SET. */
+ HARD_REG_SET x_call_used_reg_set;
-extern int reg_alloc_order[FIRST_PSEUDO_REGISTER];
+ /* Contains registers that are fixed use -- i.e. in fixed_reg_set -- or
+ a function value return register or TARGET_STRUCT_VALUE_RTX or
+ STATIC_CHAIN_REGNUM. These are the registers that cannot hold quantities
+ across calls even if we are willing to save and restore them. */
+ HARD_REG_SET x_call_fixed_reg_set;
-/* The inverse of reg_alloc_order. */
+ /* Contains 1 for registers that are set or clobbered by calls. */
+ /* ??? Ideally, this would be just call_used_regs plus global_regs, but
+ for someone's bright idea to have call_used_regs strictly include
+ fixed_regs. Which leaves us guessing as to the set of fixed_regs
+ that are actually preserved. We know for sure that those associated
+ with the local stack frame are safe, but scant others. */
+ HARD_REG_SET x_regs_invalidated_by_call;
-extern int inv_reg_alloc_order[FIRST_PSEUDO_REGISTER];
-#endif
-
-/* For each reg class, a HARD_REG_SET saying which registers are in it. */
+ /* Call used hard registers which can not be saved because there is no
+ insn for this. */
+ HARD_REG_SET x_no_caller_save_reg_set;
-extern HARD_REG_SET reg_class_contents[N_REG_CLASSES];
+ /* Table of register numbers in the order in which to try to use them. */
+ int x_reg_alloc_order[FIRST_PSEUDO_REGISTER];
-/* For each reg class, number of regs it contains. */
+ /* The inverse of reg_alloc_order. */
+ int x_inv_reg_alloc_order[FIRST_PSEUDO_REGISTER];
-extern unsigned int reg_class_size[N_REG_CLASSES];
+ /* For each reg class, a HARD_REG_SET saying which registers are in it. */
+ HARD_REG_SET x_reg_class_contents[N_REG_CLASSES];
-/* For each reg class, table listing all the classes contained in it. */
+ /* For each reg class, a boolean saying whether the class contains only
+ fixed registers. */
+ bool x_class_only_fixed_regs[N_REG_CLASSES];
-extern enum reg_class reg_class_subclasses[N_REG_CLASSES][N_REG_CLASSES];
+ /* For each reg class, number of regs it contains. */
+ unsigned int x_reg_class_size[N_REG_CLASSES];
-/* For each pair of reg classes,
- a largest reg class contained in their union. */
+ /* For each reg class, table listing all the classes contained in it. */
+ enum reg_class x_reg_class_subclasses[N_REG_CLASSES][N_REG_CLASSES];
-extern enum reg_class reg_class_subunion[N_REG_CLASSES][N_REG_CLASSES];
+ /* For each pair of reg classes,
+ a largest reg class contained in their union. */
+ enum reg_class x_reg_class_subunion[N_REG_CLASSES][N_REG_CLASSES];
-/* For each pair of reg classes,
- the smallest reg class that contains their union. */
+ /* For each pair of reg classes,
+ the smallest reg class that contains their union. */
+ enum reg_class x_reg_class_superunion[N_REG_CLASSES][N_REG_CLASSES];
-extern enum reg_class reg_class_superunion[N_REG_CLASSES][N_REG_CLASSES];
+ /* Vector indexed by hardware reg giving its name. */
+ const char *x_reg_names[FIRST_PSEUDO_REGISTER];
+};
-/* Vector indexed by hardware reg giving its name. */
+extern struct target_hard_regs default_target_hard_regs;
+#if SWITCHABLE_TARGET
+extern struct target_hard_regs *this_target_hard_regs;
+#else
+#define this_target_hard_regs (&default_target_hard_regs)
+#endif
-extern const char * reg_names[FIRST_PSEUDO_REGISTER];
+#define fixed_regs \
+ (this_target_hard_regs->x_fixed_regs)
+#define fixed_reg_set \
+ (this_target_hard_regs->x_fixed_reg_set)
+#define call_used_regs \
+ (this_target_hard_regs->x_call_used_regs)
+#define call_really_used_regs \
+ (this_target_hard_regs->x_call_really_used_regs)
+#define call_used_reg_set \
+ (this_target_hard_regs->x_call_used_reg_set)
+#define call_fixed_reg_set \
+ (this_target_hard_regs->x_call_fixed_reg_set)
+#define regs_invalidated_by_call \
+ (this_target_hard_regs->x_regs_invalidated_by_call)
+#define no_caller_save_reg_set \
+ (this_target_hard_regs->x_no_caller_save_reg_set)
+#define reg_alloc_order \
+ (this_target_hard_regs->x_reg_alloc_order)
+#define inv_reg_alloc_order \
+ (this_target_hard_regs->x_inv_reg_alloc_order)
+#define reg_class_contents \
+ (this_target_hard_regs->x_reg_class_contents)
+#define class_only_fixed_regs \
+ (this_target_hard_regs->x_class_only_fixed_regs)
+#define reg_class_size \
+ (this_target_hard_regs->x_reg_class_size)
+#define reg_class_subclasses \
+ (this_target_hard_regs->x_reg_class_subclasses)
+#define reg_class_subunion \
+ (this_target_hard_regs->x_reg_class_subunion)
+#define reg_class_superunion \
+ (this_target_hard_regs->x_reg_class_superunion)
+#define reg_names \
+ (this_target_hard_regs->x_reg_names)
/* Vector indexed by reg class giving its name. */
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