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Simplify this code, no functionality change.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47434 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2008-02-21 09:14:53 +00:00
parent 3b71165b32
commit 39442afb36
1 changed files with 2 additions and 5 deletions
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7
lib/Analysis/ScalarEvolution.cpp
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@ -2600,11 +2600,8 @@ SCEVHandle ScalarEvolutionsImpl::HowFarToNonZero(SCEV *V, const Loop *L) {
// If the value is a constant, check to see if it is known to be non-zero
// already. If so, the backedge will execute zero times.
if (SCEVConstant *C = dyn_cast<SCEVConstant>(V)) {
Constant *Zero = Constant::getNullValue(C->getValue()->getType());
Constant *NonZero =
ConstantExpr::getICmp(ICmpInst::ICMP_NE, C->getValue(), Zero);
if (NonZero == ConstantInt::getTrue())
return getSCEV(Zero);
if (!C->getValue()->isNullValue())
return SE.getIntegerSCEV(0, C->getType());
return UnknownValue; // Otherwise it will loop infinitely.
}