diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp | 2 | ||||
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp | 6 |
2 files changed, 1 insertions, 7 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp index 07ee3c032c2..6b03b682bca 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -520,7 +520,7 @@ static Value *simplifyX86muldq(const IntrinsicInst &II, ResTy->getScalarSizeInBits() == 64 && "Unexpected muldq/muludq types"); // muldq/muludq(undef, undef) -> zero (matches generic mul behavior) - if (isa<UndefValue>(Arg0) && isa<UndefValue>(Arg1)) + if (isa<UndefValue>(Arg0) || isa<UndefValue>(Arg1)) return ConstantAggregateZero::get(ResTy); // Constant folding. diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp index e625f804a23..fb7177f1ddb 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp @@ -1469,12 +1469,6 @@ Value *InstCombiner::SimplifyDemandedVectorElts(Value *V, APInt DemandedElts, Depth + 1); if (TmpV) { II->setArgOperand(1, TmpV); MadeChange = true; } - // Output elements are undefined if both are undefined. Consider things - // like undef*0. The result is known zero, not undef. - for (unsigned i = 0; i != VWidth; ++i) - if (UndefElts2[i * 2] && UndefElts3[i * 2]) - UndefElts.setBit(i); - break; } |
