diff options
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp index fcf69f6171a6..1b5c4b1ffd7f 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -5875,25 +5875,6 @@ static Instruction *processUMulZExtIdiom(ICmpInst &I, Value *MulVal, // Recognize patterns switch (I.getPredicate()) { - case ICmpInst::ICMP_EQ: - case ICmpInst::ICMP_NE: - // Recognize pattern: - // mulval = mul(zext A, zext B) - // cmp eq/neq mulval, and(mulval, mask), mask selects low MulWidth bits. - ConstantInt *CI; - Value *ValToMask; - if (match(OtherVal, m_And(m_Value(ValToMask), m_ConstantInt(CI)))) { - if (ValToMask != MulVal) - return nullptr; - const APInt &CVal = CI->getValue() + 1; - if (CVal.isPowerOf2()) { - unsigned MaskWidth = CVal.logBase2(); - if (MaskWidth == MulWidth) - break; // Recognized - } - } - return nullptr; - case ICmpInst::ICMP_UGT: // Recognize pattern: // mulval = mul(zext A, zext B) @@ -5969,11 +5950,6 @@ static Instruction *processUMulZExtIdiom(ICmpInst &I, Value *MulVal, // depending on predicate. bool Inverse = false; switch (I.getPredicate()) { - case ICmpInst::ICMP_NE: - break; - case ICmpInst::ICMP_EQ: - Inverse = true; - break; case ICmpInst::ICMP_UGT: if (I.getOperand(0) == MulVal) break; |