diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp index ef72f3bbb72..ce6b38c90ca 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -5518,6 +5518,11 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) { } } + // fcmp pred (fneg X), (fneg Y) -> fcmp swap(pred) X, Y + Value *X, *Y; + if (match(Op0, m_FNeg(m_Value(X))) && match(Op1, m_FNeg(m_Value(Y)))) + return new FCmpInst(I.getSwappedPredicate(), X, Y, "", &I); + // Test if the FCmpInst instruction is used exclusively by a select as // part of a minimum or maximum operation. If so, refrain from doing // any other folding. This helps out other analyses which understand @@ -5576,12 +5581,7 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) { if (Instruction *R = foldFabsWithFcmpZero(I)) return R; - Value *X, *Y; if (match(Op0, m_FNeg(m_Value(X)))) { - // fcmp pred (fneg X), (fneg Y) -> fcmp swap(pred) X, Y - if (match(Op1, m_FNeg(m_Value(Y)))) - return new FCmpInst(I.getSwappedPredicate(), X, Y, "", &I); - // fcmp pred (fneg X), C --> fcmp swap(pred) X, -C Constant *C; if (match(Op1, m_Constant(C))) { |
