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| author | Richard Henderson <rth@cygnus.com> | 2000-03-17 15:24:30 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-03-17 15:24:30 -0800 |
| commit | 787ccee0124924e9a03f6e350cb30b6d9924eb50 (patch) | |
| tree | 12ce3ec806bf4247c716bb8a833b7b29f9d35843 /gcc/rtlanal.c | |
| parent | 7d89dda571403fb5293782e4786738ef189b85b3 (diff) | |
| download | gcc-787ccee0124924e9a03f6e350cb30b6d9924eb50.zip gcc-787ccee0124924e9a03f6e350cb30b6d9924eb50.tar.gz gcc-787ccee0124924e9a03f6e350cb30b6d9924eb50.tar.bz2 | |
rtlanal.c (single_set): Reject if the parallel has anything except SET or USE or CLOBBER.
* rtlanal.c (single_set): Reject if the parallel has anything
except SET or USE or CLOBBER.
From-SVN: r32614
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 5c7e527..b10a3bf 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -703,16 +703,30 @@ single_set (insn) else if (GET_CODE (PATTERN (insn)) == PARALLEL) { for (i = 0, set = 0; i < XVECLEN (PATTERN (insn), 0); i++) - if (GET_CODE (XVECEXP (PATTERN (insn), 0, i)) == SET - && (! find_reg_note (insn, REG_UNUSED, - SET_DEST (XVECEXP (PATTERN (insn), 0, i))) - || side_effects_p (XVECEXP (PATTERN (insn), 0, i)))) - { - if (set) + { + rtx sub = XVECEXP (PATTERN (insn), 0, i); + + switch (GET_CODE (sub)) + { + case USE: + case CLOBBER: + break; + + case SET: + if (! find_reg_note (insn, REG_UNUSED, SET_DEST (sub)) + || side_effects_p (sub)) + { + if (set) + return 0; + else + set = sub; + } + break; + + default: return 0; - else - set = XVECEXP (PATTERN (insn), 0, i); - } + } + } return set; } |