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| author | Paolo Bonzini <bonzini@gnu.org> | 2009-05-12 09:43:48 +0000 |
|---|---|---|
| committer | Paolo Bonzini <bonzini@gcc.gnu.org> | 2009-05-12 09:43:48 +0000 |
| commit | f90b7a5a7913cc7239cce42f6ca328b9a741b387 (patch) | |
| tree | 06c940a96a184a178bfadd53e04213225655a68d /gcc/final.c | |
| parent | b7a0af68063c79655c561750e9863799bf846cae (diff) | |
| download | gcc-f90b7a5a7913cc7239cce42f6ca328b9a741b387.zip gcc-f90b7a5a7913cc7239cce42f6ca328b9a741b387.tar.gz gcc-f90b7a5a7913cc7239cce42f6ca328b9a741b387.tar.bz2 | |
Merge cond-optab branch.
From-SVN: r147425
Diffstat (limited to 'gcc/final.c')
| -rw-r--r-- | gcc/final.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/gcc/final.c b/gcc/final.c index 551b3a0..30ccc85 100644 --- a/gcc/final.c +++ b/gcc/final.c @@ -2320,9 +2320,13 @@ final_scan_insn (rtx insn, FILE *file, int optimize ATTRIBUTE_UNUSED, && GET_CODE (SET_DEST (set)) == CC0 && insn != last_ignored_compare) { + rtx src1, src2; if (GET_CODE (SET_SRC (set)) == SUBREG) SET_SRC (set) = alter_subreg (&SET_SRC (set)); - else if (GET_CODE (SET_SRC (set)) == COMPARE) + + src1 = SET_SRC (set); + src2 = NULL_RTX; + if (GET_CODE (SET_SRC (set)) == COMPARE) { if (GET_CODE (XEXP (SET_SRC (set), 0)) == SUBREG) XEXP (SET_SRC (set), 0) @@ -2330,11 +2334,18 @@ final_scan_insn (rtx insn, FILE *file, int optimize ATTRIBUTE_UNUSED, if (GET_CODE (XEXP (SET_SRC (set), 1)) == SUBREG) XEXP (SET_SRC (set), 1) = alter_subreg (&XEXP (SET_SRC (set), 1)); + if (XEXP (SET_SRC (set), 1) + == CONST0_RTX (GET_MODE (XEXP (SET_SRC (set), 0)))) + src2 = XEXP (SET_SRC (set), 0); } if ((cc_status.value1 != 0 - && rtx_equal_p (SET_SRC (set), cc_status.value1)) + && rtx_equal_p (src1, cc_status.value1)) || (cc_status.value2 != 0 - && rtx_equal_p (SET_SRC (set), cc_status.value2))) + && rtx_equal_p (src1, cc_status.value2)) + || (src2 != 0 && cc_status.value1 != 0 + && rtx_equal_p (src2, cc_status.value1)) + || (src2 != 0 && cc_status.value2 != 0 + && rtx_equal_p (src2, cc_status.value2))) { /* Don't delete insn if it has an addressing side-effect. */ if (! FIND_REG_INC_NOTE (insn, NULL_RTX) @@ -2348,9 +2359,7 @@ final_scan_insn (rtx insn, FILE *file, int optimize ATTRIBUTE_UNUSED, } } } -#endif -#ifdef HAVE_cc0 /* If this is a conditional branch, maybe modify it if the cc's are in a nonstandard state so that it accomplishes the same thing that it would |