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(flag_omit_frame_pointer, outer_function_chain: declare.

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From-SVN: r12897
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Stan Cox 1996-10-04 14:07:02 +00:00
parent 1fdae49c42
commit 1b90646a5b
1 changed files with 26 additions and 0 deletions
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26
gcc/config/i386/i386.h
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@ -2589,6 +2589,32 @@ do { \
} while (0)
/* Helper macros to decide if the rtl of some instruction
will cause problems due to register shortage. */
/* ??? flags.h is not self-contained */
extern int flag_omit_frame_pointer;
/* ??? neither is function.h */
extern struct function *outer_function_chain;
/* ??? neither is expr.h */
extern int current_function_calls_alloca;
/* ??? No header file for rtx_equal_function_value_matters */
extern int rtx_equal_function_value_matters;
#define N_REGS_USED(op) \
(GET_CODE (op) == MEM \
? (GET_CODE (XEXP (op, 0)) == PLUS \
? (rtx_varies_p (XEXP (XEXP (op, 0), 0)) \
+ rtx_varies_p (XEXP (XEXP (op, 0), 1))) \
: rtx_varies_p (XEXP (op, 0))) \
: (GET_CODE (op) == REG ? HARD_REGNO_NREGS (REGNO (op), GET_MODE (op)) : 0))
#define N_ALLOCATABLE_REGISTERS \
(6 - (flag_pic != 0) - (outer_function_chain != 0) \
+ (flag_omit_frame_pointer && ! rtx_equal_function_value_matters \
&& ! current_function_calls_alloca)) \
/* Functions in i386.c */
extern void override_options ();
extern void order_regs_for_local_alloc ();