diff options
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp | 3 | ||||
| -rw-r--r-- | test/Transforms/InstCombine/shift.ll | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp b/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp index c65076e..c832ca5 100644 --- a/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp +++ b/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp @@ -876,7 +876,8 @@ Value *InstCombiner::SimplifyShrShlDemandedBits(Instruction *Shr, New->setHasNoUnsignedWrap(Orig->hasNoUnsignedWrap()); } else { Constant *Amt = ConstantInt::get(VarX->getType(), ShrAmt - ShlAmt); - New = BinaryOperator::CreateLShr(VarX, Amt); + New = isLshr ? BinaryOperator::CreateLShr(VarX, Amt) : + BinaryOperator::CreateAShr(VarX, Amt); } return InsertNewInstWith(New, *Shl); diff --git a/test/Transforms/InstCombine/shift.ll b/test/Transforms/InstCombine/shift.ll index b152816..fad0bd7 100644 --- a/test/Transforms/InstCombine/shift.ll +++ b/test/Transforms/InstCombine/shift.ll @@ -723,7 +723,7 @@ define i32 @test60(i32 %x) { %or = or i32 %shl, 1 ret i32 %or ; CHECK: @test60 -; CHECK: lshr i32 %x, 3 +; CHECK: ashr i32 %x, 3 } |