diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index 9efc797d464..9bbabd9203b 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp @@ -1081,12 +1081,14 @@ static Instruction *foldUDivShl(Value *Op0, Value *Op1, const BinaryOperator &I, if (!match(Op1, m_ZExt(m_Value(ShiftLeft)))) ShiftLeft = Op1; - const APInt *CI; + Constant *CI; Value *N; - if (!match(ShiftLeft, m_Shl(m_APInt(CI), m_Value(N)))) + if (!match(ShiftLeft, m_Shl(m_Constant(CI), m_Value(N)))) llvm_unreachable("match should never fail here!"); - if (*CI != 1) - N = IC.Builder.CreateAdd(N, ConstantInt::get(N->getType(), CI->logBase2())); + Constant *Log2Base = getLogBase2(N->getType(), CI); + if (!Log2Base) + llvm_unreachable("getLogBase2 should never fail here!"); + N = IC.Builder.CreateAdd(N, Log2Base); if (Op1 != ShiftLeft) N = IC.Builder.CreateZExt(N, Op1->getType()); BinaryOperator *LShr = BinaryOperator::CreateLShr(Op0, N); |
