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Eliminate a redundant check. This speeds up optimization of 253.perlbmk from 13.5 seconds to 10.9 seconds. 

llvm-svn: 37683
This commit is contained in:
Owen Anderson 2007-06-21 01:59:05 +00:00
parent fd5683ad7a
commit 27876a3ff9
1 changed files with 3 additions and 7 deletions
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10
llvm/lib/Transforms/Scalar/GVNPRE.cpp
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@ -887,13 +887,9 @@ bool GVNPRE::buildsets_anticin(BasicBlock* BB,
// However, for opaques, such as constants within PHI nodes, it is
// possible that they have not yet received a number. Make sure they do
// so now.
uint32_t valNum = 0;
if (isa<BinaryOperator>(*I) || isa<CmpInst>(*I))
valNum = VN.lookup(*I);
else
valNum = VN.lookup_or_add(*I);
if (find_leader(anticIn, valNum) == 0)
val_insert(anticIn, *I);
if (!isa<BinaryOperator>(*I) && !isa<CmpInst>(*I))
VN.lookup_or_add(*I);
val_insert(anticIn, *I);
}
clean(anticIn);