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InstCombine: match can find ConstantExprs, don't assume we have a Value

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We assumed the output of a match was a Value, this would cause us to
assert because we would fail a cast<>.  Instead, use a helper in the
Operator family to hide the distinction between Value and Constant.

This fixes PR22087.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225127 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2015-01-04 07:36:02 +00:00
parent 77e22b7836
commit 07d7dbae9e
2 changed files with 11 additions and 2 deletions
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4
lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
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@@ -341,10 +341,10 @@ Instruction *InstCombiner::visitMul(BinaryOperator &I) {
bool ShlNSW = false;
if (match(Op0, m_Shl(m_One(), m_Value(Y)))) {
BO = BinaryOperator::CreateShl(Op1, Y);
ShlNSW = cast<BinaryOperator>(Op0)->hasNoSignedWrap();
ShlNSW = cast<ShlOperator>(Op0)->hasNoSignedWrap();
} else if (match(Op1, m_Shl(m_One(), m_Value(Y)))) {
BO = BinaryOperator::CreateShl(Op0, Y);
ShlNSW = cast<BinaryOperator>(Op1)->hasNoSignedWrap();
ShlNSW = cast<ShlOperator>(Op1)->hasNoSignedWrap();
}
if (BO) {
if (I.hasNoUnsignedWrap())