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Simplify code. No functionality changes, name changes aside.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132896 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2011-06-12 22:47:53 +00:00
parent b73cd94292
commit 7e7c9cc31a
2 changed files with 8 additions and 13 deletions
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17
lib/Transforms/InstCombine/InstCombineCompares.cpp
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@@ -1087,19 +1087,14 @@ Instruction *InstCombiner::visitICmpInstWithInstAndIntCst(ICmpInst &ICI,
// have its sign bit set or if it is an equality comparison.
// Extending a relational comparison when we're checking the sign
// bit would not work.
if (Cast->hasOneUse() &&
(ICI.isEquality() ||
(AndCST->getValue().isNonNegative() && RHSV.isNonNegative()))) {
uint32_t BitWidth =
cast<IntegerType>(Cast->getOperand(0)->getType())->getBitWidth();
APInt NewCST = AndCST->getValue().zext(BitWidth);
APInt NewCI = RHSV.zext(BitWidth);
Value *NewAnd =
if (ICI.isEquality() ||
(AndCST->getValue().isNonNegative() && RHSV.isNonNegative())) {
Value *NewAnd =
Builder->CreateAnd(Cast->getOperand(0),
ConstantInt::get(ICI.getContext(), NewCST),
LHSI->getName());
ConstantExpr::getZExt(AndCST, Cast->getSrcTy()));
NewAnd->takeName(LHSI);
return new ICmpInst(ICI.getPredicate(), NewAnd,
ConstantInt::get(ICI.getContext(), NewCI));
ConstantExpr::getZExt(RHS, Cast->getSrcTy()));
}
}