From d159d946449def169bff0fc86e0f6b20d59cf475 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Thu, 31 Mar 2011 10:12:22 +0000 Subject: InstCombine: fold fcmp (fneg x), (fneg y) -> fcmp x, y llvm-svn: 128627 --- llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'llvm/lib/Transforms') diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp index 6743885cd42..cb434bda57a 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -2855,6 +2855,11 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) { } } + // fcmp (fneg x), (fneg y) -> fcmp x, y + Value *X, *Y; + if (match(Op0, m_FNeg(m_Value(X))) && match(Op1, m_FNeg(m_Value(Y)))) + return new FCmpInst(I.getPredicate(), X, Y); + // fcmp (fpext x), (fpext y) -> fcmp x, y if (FPExtInst *LHSExt = dyn_cast(Op0)) if (FPExtInst *RHSExt = dyn_cast(Op1)) -- cgit v1.2.3