int live_length; /* # of instructions (REG n) is live */
int calls_crossed; /* # of calls (REG n) is live across */
int basic_block; /* # of basic blocks (REG n) is used in */
- char changes_size; /* whether (SUBREG (REG n)) changes size */
+ char changes_mode; /* whether (SUBREG (REG n)) exists and
+ is illegal. */
} reg_info;
extern varray_type reg_n_info;
-extern unsigned int reg_n_max;
-
/* Indexed by n, gives number of times (REG n) is used or set.
References within loops may be counted more times. */
#define REG_N_DEATHS(N) (VARRAY_REG (reg_n_info, N)->deaths)
/* Indexed by N; says whether a pseudo register N was ever used
- within a SUBREG that changes the size of the reg. Some machines prohibit
- such objects to be in certain (usually floating-point) registers. */
+ within a SUBREG that changes the mode of the reg in some way
+ that is illegal for a given class (usually floating-point)
+ of registers. */
-#define REG_CHANGES_SIZE(N) (VARRAY_REG (reg_n_info, N)->changes_size)
+#define REG_CHANGES_MODE(N) (VARRAY_REG (reg_n_info, N)->changes_mode)
/* Get the number of consecutive words required to hold pseudo-reg N. */
/* Vector indexed by hardware reg giving its name. */
-extern const 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