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| author | Nick Lewycky <nicholas@mxc.ca> | 2014-06-19 03:28:28 +0000 |
|---|---|---|
| committer | Nick Lewycky <nicholas@mxc.ca> | 2014-06-19 03:28:28 +0000 |
| commit | bdb4aca20211b9ed31874c1be0d814fe26f10a24 (patch) | |
| tree | c8b5f16b3ad80a6d4c6308668b5b0b6c6a3a5d17 /lib/Transforms | |
| parent | f9ec8fe70c5084a15372cc0b126218f699794e24 (diff) | |
| download | llvm-bdb4aca20211b9ed31874c1be0d814fe26f10a24.tar.gz llvm-bdb4aca20211b9ed31874c1be0d814fe26f10a24.tar.bz2 llvm-bdb4aca20211b9ed31874c1be0d814fe26f10a24.tar.xz | |
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!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211250 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineShifts.cpp | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineShifts.cpp b/lib/Transforms/InstCombine/InstCombineShifts.cpp index cc6665c947..2495747da5 100644 --- a/lib/Transforms/InstCombine/InstCombineShifts.cpp +++ b/lib/Transforms/InstCombine/InstCombineShifts.cpp @@ -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 |