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Remove redundant code in InstCombineShift, no functionality change because instsimplify already does this and instcombine calls instsimplify a few lines above. Patch by Suyog Sarda!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211250 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2014-06-19 03:28:28 +00:00
parent f9ec8fe70c
commit bdb4aca202
1 changed files with 0 additions and 5 deletions
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5
lib/Transforms/InstCombine/InstCombineShifts.cpp
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@ -789,11 +789,6 @@ Instruction *InstCombiner::visitAShr(BinaryOperator &I) {
// have a sign-extend idiom.
Value *X;
if (match(Op0, m_Shl(m_Value(X), m_Specific(Op1)))) {
// If the left shift is just shifting out partial signbits, delete the
// extension.
if (cast<OverflowingBinaryOperator>(Op0)->hasNoSignedWrap())
return ReplaceInstUsesWith(I, X);
// If the input is an extension from the shifted amount value, e.g.
// %x = zext i8 %A to i32
// %y = shl i32 %x, 24