/* Define per-register tables for data flow info and register allocation.
- Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1987, 93-99, 2000 Free Software Foundation, Inc.
This file is part of GNU CC.
extern int max_regno;
-/* Maximum number of SCRATCH rtx's in each block of this function. */
-
-extern int max_scratch;
-
/* Register information indexed by register number */
-typedef struct reg_info_def {
- /* fields set by reg_scan */
+typedef struct reg_info_def
+{ /* fields set by reg_scan */
int first_uid; /* UID of first insn to use (REG n) */
int last_uid; /* UID of last insn to use (REG n) */
int last_note_uid; /* UID of last note to use (REG n) */
- /* fields set by both reg_scan and flow_analysis */
+ /* fields set by reg_scan & flow_analysis */
int sets; /* # of times (REG n) is set */
/* fields set by flow_analysis */
/* Vector indexed by hardware reg giving its name. */
-extern char *reg_names[FIRST_PSEUDO_REGISTER];
+extern const char *reg_names[FIRST_PSEUDO_REGISTER];
/* For each hard register, the widest mode object that it can contain.
This will be a MODE_INT mode if the register can hold integers. Otherwise
#define REGNO_LAST_NOTE_UID(N) (VARRAY_REG (reg_n_info, N)->last_note_uid)
-/* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function.
- After rtl generation, it is 1 plus the largest register number used. */
-
-extern int reg_rtx_no;
-
-/* Vector indexed by regno; contains 1 for a register is considered a pointer.
- Reloading, etc. will use a pointer register rather than a non-pointer
- as the base register in an address, when there is a choice of two regs. */
-
-extern char *regno_pointer_flag;
-#define REGNO_POINTER_FLAG(REGNO) regno_pointer_flag[REGNO]
-extern int regno_pointer_flag_length;
-
/* List made of EXPR_LIST rtx's which gives pairs of pseudo registers
that have to go in the same hard reg. */
extern rtx regs_may_share;
-/* Vector mapping pseudo regno into the REG rtx for that register.
- This is computed by reg_scan. */
-
-extern rtx *regno_reg_rtx;
-
/* Flag set by local-alloc or global-alloc if they decide to allocate
something in a call-clobbered register. */
#define CLASS_LIKELY_SPILLED_P(CLASS) (reg_class_size[(int) (CLASS)] == 1)
#endif
-/* Allocated in local_alloc. */
+/* Select a register mode required for caller save of hard regno REGNO. */
+#ifndef HARD_REGNO_CALLER_SAVE_MODE
+#define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS) \
+ choose_hard_reg_mode (REGNO, NREGS)
+#endif
-/* A list of SCRATCH rtl allocated by local-alloc. */
-extern rtx *scratch_list;
-/* The basic block in which each SCRATCH is used. */
-extern int *scratch_block;
-/* The length of the arrays pointed to by scratch_block and scratch_list. */
-extern int scratch_list_length;
+/* Registers that get partially clobbered by a call in a given mode.
+ These must not be call used registers. */
+#ifndef HARD_REGNO_CALL_PART_CLOBBERED
+#define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) 0
+#endif
/* Allocate reg_n_info tables */
-extern void allocate_reg_info PROTO((size_t, int, int));
+extern void allocate_reg_info PARAMS ((size_t, int, int));