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| author | Stan Cox <coxs@gnu.org> | 1996-10-04 14:07:02 +0000 |
|---|---|---|
| committer | Stan Cox <coxs@gnu.org> | 1996-10-04 14:07:02 +0000 |
| commit | 1b90646a5b03ce4a7747ee3a37b20633a1ff9ae0 (patch) | |
| tree | d2cc0daa977383c1a82d3ec6306f6f9a1ed8fabd /gcc | |
| parent | 1fdae49c422b0984c28545888c1b69293fddef86 (diff) | |
| download | gcc-1b90646a5b03ce4a7747ee3a37b20633a1ff9ae0.zip gcc-1b90646a5b03ce4a7747ee3a37b20633a1ff9ae0.tar.gz gcc-1b90646a5b03ce4a7747ee3a37b20633a1ff9ae0.tar.bz2 | |
(flag_omit_frame_pointer, outer_function_chain: declare.
From-SVN: r12897
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/i386.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h index bb59019..f556745 100644 --- a/gcc/config/i386/i386.h +++ b/gcc/config/i386/i386.h @@ -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 (); |