diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp index 05f34e9eaa0..e946acf84f5 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp @@ -794,6 +794,11 @@ unsigned FAddCombine::calcInstrNumber(const AddendVect &Opnds) { if (Opnd->isConstant()) continue; + // The constant check above is really for a few special constant + // coefficients. + if (isa<UndefValue>(Opnd->getSymVal())) + continue; + const FAddendCoef &CE = Opnd->getCoef(); if (CE.isMinusOne() || CE.isMinusTwo()) NegOpndNum++; |
