From 8611e023941ba72ba956ef72176cf89e5bac5aa4 Mon Sep 17 00:00:00 2001 From: Matt Arsenault Date: Mon, 23 Jan 2017 19:08:34 +0000 Subject: [PATCH] AMDGPU: Propagate fast math flags in fneg combines Can't for fma/mad since it seems they can't have flags currently. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292818 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/AMDGPU/AMDGPUISelLowering.cpp | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/lib/Target/AMDGPU/AMDGPUISelLowering.cpp index 54caa2c5dfa..d92178328ff 100644 --- a/lib/Target/AMDGPU/AMDGPUISelLowering.cpp +++ b/lib/Target/AMDGPU/AMDGPUISelLowering.cpp @@ -2872,7 +2872,7 @@ SDValue AMDGPUTargetLowering::performFNegCombine(SDNode *N, else RHS = RHS.getOperand(0); - SDValue Res = DAG.getNode(ISD::FADD, SL, VT, LHS, RHS); + SDValue Res = DAG.getNode(ISD::FADD, SL, VT, LHS, RHS, N0->getFlags()); if (!N0.hasOneUse()) DAG.ReplaceAllUsesWith(N0, DAG.getNode(ISD::FNEG, SL, VT, Res)); return Res; @@ -2891,7 +2891,7 @@ SDValue AMDGPUTargetLowering::performFNegCombine(SDNode *N, else RHS = DAG.getNode(ISD::FNEG, SL, VT, RHS); - SDValue Res = DAG.getNode(Opc, SL, VT, LHS, RHS); + SDValue Res = DAG.getNode(Opc, SL, VT, LHS, RHS, N0->getFlags()); if (!N0.hasOneUse()) DAG.ReplaceAllUsesWith(N0, DAG.getNode(ISD::FNEG, SL, VT, Res)); return Res; @@ -2941,7 +2941,7 @@ SDValue AMDGPUTargetLowering::performFNegCombine(SDNode *N, // (fneg (fp_extend x)) -> (fp_extend (fneg x)) // (fneg (rcp x)) -> (rcp (fneg x)) SDValue Neg = DAG.getNode(ISD::FNEG, SL, CvtSrc.getValueType(), CvtSrc); - return DAG.getNode(Opc, SL, VT, Neg); + return DAG.getNode(Opc, SL, VT, Neg, N0->getFlags()); } case ISD::FP_ROUND: { SDValue CvtSrc = N0.getOperand(0); -- 2.11.0