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| author | Richard Earnshaw <erich@gnu.org> | 1994-07-12 13:31:10 +0000 |
|---|---|---|
| committer | Richard Earnshaw <erich@gnu.org> | 1994-07-12 13:31:10 +0000 |
| commit | 5bbe2d409cd4003330ff6ba3c767c484ad98d6df (patch) | |
| tree | cd0a15672ad0e2348983298c3b4656248ee6acfe | |
| parent | 5244db056ba9d864cb79d780e4be2b579068dfd5 (diff) | |
| download | gcc-5bbe2d409cd4003330ff6ba3c767c484ad98d6df.zip gcc-5bbe2d409cd4003330ff6ba3c767c484ad98d6df.tar.gz gcc-5bbe2d409cd4003330ff6ba3c767c484ad98d6df.tar.bz2 | |
(reversible_cc_register): New function.
(final_prescan_insn): Don't try to conditionalize jumps with JUMP_CLOB
attribute.
From-SVN: r7739
| -rw-r--r-- | gcc/config/arm/arm.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 732cc93..5ddb7c2 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -1253,7 +1253,32 @@ cc_register (x, mode) return FALSE; } - + +/* Return TRUE if this is the condition code register, if we aren't given + a mode, accept any mode in class CC_MODE that is reversible */ + +int +reversible_cc_register (x, mode) + rtx x; + enum machine_mode mode; +{ + if (mode == VOIDmode) + { + mode = GET_MODE (x); + if (GET_MODE_CLASS (mode) != MODE_CC + && GET_CODE (x) == REG && REGNO (x) == 24) + abort (); + if (GET_MODE_CLASS (mode) != MODE_CC + || (! flag_fast_math && ! REVERSIBLE_CC_MODE (mode))) + return FALSE; + } + + if (mode == GET_MODE (x) && GET_CODE (x) == REG && REGNO (x) == 24) + return TRUE; + + return FALSE; +} + enum rtx_code minmax_code (x) rtx x; @@ -3460,7 +3485,13 @@ final_prescan_insn (insn, opvec, noperands) rtx this_insn = start_insn, label = 0; if (get_attr_conds (insn) == CONDS_JUMP_CLOB) - jump_clobbers = 1; + { + /* The code below is wrong for these, and I haven't time to + fix it now. So we just do the safe thing and return. This + whole function needs re-writing anyway. */ + jump_clobbers = 1; + return; + } /* Register the insn jumped to. */ if (reverse) |