From b9ba849cf8f4d33e7c8d78b92091c9b141833d5f Mon Sep 17 00:00:00 2001 From: dim Date: Sun, 26 May 2019 15:44:58 +0000 Subject: [PATCH] Pull in r361696 from upstream llvm trunk (by Sanjay Patel): [SelectionDAG] soften assertion when legalizing narrow vector FP ops The test based on PR42010: https://bugs.llvm.org/show_bug.cgi?id=42010 ...may show an inaccuracy for PPC's target defs, but we should not be so aggressive with an assert here. There's no telling what out-of-tree targets look like. This fixes an assertion when building the graphics/mesa-dri port for PowerPC64. Reported by: Mark Millard PR: 238082 MFC after: 3 days --- .../lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/contrib/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp b/contrib/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp index f367e935857..983aba636ae 100644 --- a/contrib/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp +++ b/contrib/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp @@ -2523,13 +2523,11 @@ void DAGTypeLegalizer::WidenVectorResult(SDNode *N, unsigned ResNo) { // We're going to widen this vector op to a legal type by padding with undef // elements. If the wide vector op is eventually going to be expanded to // scalar libcalls, then unroll into scalar ops now to avoid unnecessary - // libcalls on the undef elements. We are assuming that if the scalar op - // requires expanding, then the vector op needs expanding too. + // libcalls on the undef elements. EVT VT = N->getValueType(0); - if (TLI.isOperationExpand(N->getOpcode(), VT.getScalarType())) { - EVT WideVecVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT); - assert(!TLI.isOperationLegalOrCustom(N->getOpcode(), WideVecVT) && - "Target supports vector op, but scalar requires expansion?"); + EVT WideVecVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT); + if (!TLI.isOperationLegalOrCustom(N->getOpcode(), WideVecVT) && + TLI.isOperationExpand(N->getOpcode(), VT.getScalarType())) { Res = DAG.UnrollVectorOp(N, WideVecVT.getVectorNumElements()); break; } -- 2.45.0