diff --git a/llvm/include/llvm/Analysis/TargetTransformInfo.h b/llvm/include/llvm/Analysis/TargetTransformInfo.h --- a/llvm/include/llvm/Analysis/TargetTransformInfo.h +++ b/llvm/include/llvm/Analysis/TargetTransformInfo.h @@ -658,6 +658,10 @@ /// Return true if the target supports nontemporal load. bool isLegalNTLoad(Type *DataType, Align Alignment) const; + /// \Returns true if the target supports broadcasting a load to a vector of + /// type . + bool isLegalBroadcastLoad(Type *ElementTy, unsigned NumElements) const; + /// Return true if the target supports masked scatter. bool isLegalMaskedScatter(Type *DataType, Align Alignment) const; /// Return true if the target supports masked gather. @@ -1044,11 +1048,14 @@ /// The exact mask may be passed as Mask, or else the array will be empty. /// The index and subtype parameters are used by the subvector insertion and /// extraction shuffle kinds to show the insert/extract point and the type of - /// the subvector being inserted/extracted. + /// the subvector being inserted/extracted. The operands of the shuffle can be + /// passed through \p Args, which helps improve the cost estimation in some + /// cases, like in broadcast loads. /// NOTE: For subvector extractions Tp represents the source type. InstructionCost getShuffleCost(ShuffleKind Kind, VectorType *Tp, ArrayRef Mask = None, int Index = 0, - VectorType *SubTp = nullptr) const; + VectorType *SubTp = nullptr, + ArrayRef Args = None) const; /// Represents a hint about the context in which a cast is used. /// @@ -1549,6 +1556,8 @@ virtual bool isLegalMaskedLoad(Type *DataType, Align Alignment) = 0; virtual bool isLegalNTStore(Type *DataType, Align Alignment) = 0; virtual bool isLegalNTLoad(Type *DataType, Align Alignment) = 0; + virtual bool isLegalBroadcastLoad(Type *ElementTy, + unsigned NumElements) const = 0; virtual bool isLegalMaskedScatter(Type *DataType, Align Alignment) = 0; virtual bool isLegalMaskedGather(Type *DataType, Align Alignment) = 0; virtual bool forceScalarizeMaskedGather(VectorType *DataType, @@ -1659,7 +1668,8 @@ ArrayRef Args, const Instruction *CxtI = nullptr) = 0; virtual InstructionCost getShuffleCost(ShuffleKind Kind, VectorType *Tp, ArrayRef Mask, int Index, - VectorType *SubTp) = 0; + VectorType *SubTp, + ArrayRef Args) = 0; virtual InstructionCost getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src, CastContextHint CCH, TTI::TargetCostKind CostKind, @@ -1952,6 +1962,10 @@ bool isLegalNTLoad(Type *DataType, Align Alignment) override { return Impl.isLegalNTLoad(DataType, Alignment); } + bool isLegalBroadcastLoad(Type *ElementTy, + unsigned NumElements) const override { + return Impl.isLegalBroadcastLoad(ElementTy, NumElements); + } bool isLegalMaskedScatter(Type *DataType, Align Alignment) override { return Impl.isLegalMaskedScatter(DataType, Alignment); } @@ -2179,8 +2193,9 @@ } InstructionCost getShuffleCost(ShuffleKind Kind, VectorType *Tp, ArrayRef Mask, int Index, - VectorType *SubTp) override { - return Impl.getShuffleCost(Kind, Tp, Mask, Index, SubTp); + VectorType *SubTp, + ArrayRef Args) override { + return Impl.getShuffleCost(Kind, Tp, Mask, Index, SubTp, Args); } InstructionCost getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src, CastContextHint CCH, diff --git a/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h b/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h --- a/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h +++ b/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h @@ -256,6 +256,10 @@ return Alignment >= DataSize && isPowerOf2_32(DataSize); } + bool isLegalBroadcastLoad(Type *ElementTy, unsigned NumElements) const { + return false; + } + bool isLegalMaskedScatter(Type *DataType, Align Alignment) const { return false; } @@ -488,7 +492,8 @@ InstructionCost getShuffleCost(TTI::ShuffleKind Kind, VectorType *Ty, ArrayRef Mask, int Index, - VectorType *SubTp) const { + VectorType *SubTp, + ArrayRef Args = None) const { return 1; } diff --git a/llvm/include/llvm/CodeGen/BasicTTIImpl.h b/llvm/include/llvm/CodeGen/BasicTTIImpl.h --- a/llvm/include/llvm/CodeGen/BasicTTIImpl.h +++ b/llvm/include/llvm/CodeGen/BasicTTIImpl.h @@ -871,7 +871,8 @@ InstructionCost getShuffleCost(TTI::ShuffleKind Kind, VectorType *Tp, ArrayRef Mask, int Index, - VectorType *SubTp) { + VectorType *SubTp, + ArrayRef Args = None) { switch (improveShuffleKindFromMask(Kind, Mask)) { case TTI::SK_Broadcast: diff --git a/llvm/lib/Analysis/TargetTransformInfo.cpp b/llvm/lib/Analysis/TargetTransformInfo.cpp --- a/llvm/lib/Analysis/TargetTransformInfo.cpp +++ b/llvm/lib/Analysis/TargetTransformInfo.cpp @@ -396,6 +396,11 @@ return TTIImpl->isLegalNTLoad(DataType, Alignment); } +bool TargetTransformInfo::isLegalBroadcastLoad(Type *ElementTy, + unsigned NumElements) const { + return TTIImpl->isLegalBroadcastLoad(ElementTy, NumElements); +} + bool TargetTransformInfo::isLegalMaskedGather(Type *DataType, Align Alignment) const { return TTIImpl->isLegalMaskedGather(DataType, Alignment); @@ -740,12 +745,11 @@ return Cost; } -InstructionCost TargetTransformInfo::getShuffleCost(ShuffleKind Kind, - VectorType *Ty, - ArrayRef Mask, - int Index, - VectorType *SubTp) const { - InstructionCost Cost = TTIImpl->getShuffleCost(Kind, Ty, Mask, Index, SubTp); +InstructionCost TargetTransformInfo::getShuffleCost( + ShuffleKind Kind, VectorType *Ty, ArrayRef Mask, int Index, + VectorType *SubTp, ArrayRef Args) const { + InstructionCost Cost = + TTIImpl->getShuffleCost(Kind, Ty, Mask, Index, SubTp, Args); assert(Cost >= 0 && "TTI should not produce negative costs!"); return Cost; } diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.h b/llvm/lib/Target/X86/X86TargetTransformInfo.h --- a/llvm/lib/Target/X86/X86TargetTransformInfo.h +++ b/llvm/lib/Target/X86/X86TargetTransformInfo.h @@ -131,7 +131,7 @@ const Instruction *CxtI = nullptr); InstructionCost getShuffleCost(TTI::ShuffleKind Kind, VectorType *Tp, ArrayRef Mask, int Index, - VectorType *SubTp); + VectorType *SubTp, ArrayRef = None); InstructionCost getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src, TTI::CastContextHint CCH, TTI::TargetCostKind CostKind, @@ -226,6 +226,7 @@ bool isLegalMaskedStore(Type *DataType, Align Alignment); bool isLegalNTLoad(Type *DataType, Align Alignment); bool isLegalNTStore(Type *DataType, Align Alignment); + bool isLegalBroadcastLoad(Type *ElementTy, unsigned NumElements) const; bool forceScalarizeMaskedGather(VectorType *VTy, Align Alignment); bool forceScalarizeMaskedScatter(VectorType *VTy, Align Alignment) { return forceScalarizeMaskedGather(VTy, Alignment); diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp --- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp +++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp @@ -1085,7 +1085,8 @@ InstructionCost X86TTIImpl::getShuffleCost(TTI::ShuffleKind Kind, VectorType *BaseTp, ArrayRef Mask, int Index, - VectorType *SubTp) { + VectorType *SubTp, + ArrayRef Args) { // 64-bit packed float vectors (v2f32) are widened to type v4f32. // 64-bit packed integer vectors (v2i32) are widened to type v4i32. std::pair LT = TLI->getTypeLegalizationCost(DL, BaseTp); @@ -1545,9 +1546,27 @@ { TTI::SK_PermuteTwoSrc, MVT::v16i8, 13 }, // blend+permute }; - if (ST->hasSSE2()) + static const CostTblEntry SSE3BroadcastLoadTbl[] = { + {TTI::SK_Broadcast, MVT::v2f64, 0}, // broadcast handled by movddup + }; + + if (ST->hasSSE2()) { + bool IsLoad = !Args.empty() && llvm::all_of(Args, [](const Value *V) { + return isa(V); + }); + if (ST->hasSSE3() && IsLoad) + if (const auto *Entry = + CostTableLookup(SSE3BroadcastLoadTbl, Kind, LT.second)) { + assert(isLegalBroadcastLoad( + BaseTp->getElementType(), + cast(BaseTp)->getNumElements()) && + "Table entry missing from isLegalBroadcastLoad()"); + return LT.first * Entry->Cost; + } + if (const auto *Entry = CostTableLookup(SSE2ShuffleTbl, Kind, LT.second)) return LT.first * Entry->Cost; + } static const CostTblEntry SSE1ShuffleTbl[] = { { TTI::SK_Broadcast, MVT::v4f32, 1 }, // shufps @@ -5112,6 +5131,13 @@ return true; } +bool X86TTIImpl::isLegalBroadcastLoad(Type *ElementTy, + unsigned NumElements) const { + // movddup + return ST->hasSSSE3() && NumElements == 2 && + ElementTy == Type::getDoubleTy(ElementTy->getContext()); +} + bool X86TTIImpl::isLegalMaskedExpandLoad(Type *DataTy) { if (!isa(DataTy)) return false; diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp --- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp +++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp @@ -1142,6 +1142,11 @@ /// Loads from consecutive memory addresses, e.g. load(A[i]), load(A[i+1]). static const int ScoreConsecutiveLoads = 4; + /// The same load multiple times. This should have a better score than + /// `ScoreSplat` because it in x86 for a 2-lane vector we can represent it + /// with `movddup (%reg), xmm0` which has a throughput of 0.5 versus 0.5 for + /// a vector load and 1.0 for a broadcast. + static const int ScoreSplatLoads = 3; /// Loads from reversed memory addresses, e.g. load(A[i+1]), load(A[i]). static const int ScoreReversedLoads = 3; /// ExtractElementInst from same vector and consecutive indexes. @@ -1168,9 +1173,18 @@ /// MainAltOps. static int getShallowScore(Value *V1, Value *V2, const DataLayout &DL, ScalarEvolution &SE, int NumLanes, - ArrayRef MainAltOps) { - if (V1 == V2) + ArrayRef MainAltOps, + const TargetTransformInfo *TTI) { + if (V1 == V2) { + if (isa(V1)) { + // A broadcast of a load can be cheaper on some targets. + // TODO: For now accept a broadcast load with no other internal uses. + if (TTI->isLegalBroadcastLoad(V1->getType(), NumLanes) && + (int)V1->getNumUses() == NumLanes) + return VLOperands::ScoreSplatLoads; + } return VLOperands::ScoreSplat; + } auto *LI1 = dyn_cast(V1); auto *LI2 = dyn_cast(V2); @@ -1349,7 +1363,7 @@ // Get the shallow score of V1 and V2. int ShallowScoreAtThisLevel = - getShallowScore(LHS, RHS, DL, SE, getNumLanes(), MainAltOps); + getShallowScore(LHS, RHS, DL, SE, getNumLanes(), MainAltOps, R.TTI); // If reached MaxLevel, // or if V1 and V2 are not instructions, @@ -5238,7 +5252,9 @@ // broadcast. assert(VecTy == FinalVecTy && "No reused scalars expected for broadcast."); - return TTI->getShuffleCost(TargetTransformInfo::SK_Broadcast, VecTy); + return TTI->getShuffleCost(TargetTransformInfo::SK_Broadcast, VecTy, + /*Mask=*/None, /*Index=*/0, + /*SubTp=*/nullptr, /*Args=*/VL); } InstructionCost ReuseShuffleCost = 0; if (NeedToShuffleReuses) diff --git a/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll b/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll --- a/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll @@ -591,8 +591,8 @@ ; CHECK-LABEL: @ChecksExtractScores_different_vectors( ; CHECK-NEXT: [[IDX0:%.*]] = getelementptr inbounds double, double* [[ARRAY:%.*]], i64 0 ; CHECK-NEXT: [[IDX1:%.*]] = getelementptr inbounds double, double* [[ARRAY]], i64 1 -; CHECK-NEXT: [[TMP1:%.*]] = bitcast double* [[IDX0]] to <2 x double>* -; CHECK-NEXT: [[TMP2:%.*]] = load <2 x double>, <2 x double>* [[TMP1]], align 4 +; CHECK-NEXT: [[LOADA0:%.*]] = load double, double* [[IDX0]], align 4 +; CHECK-NEXT: [[LOADA1:%.*]] = load double, double* [[IDX1]], align 4 ; CHECK-NEXT: [[LOADVEC:%.*]] = load <2 x double>, <2 x double>* [[VECPTR1:%.*]], align 4 ; CHECK-NEXT: [[LOADVEC2:%.*]] = load <2 x double>, <2 x double>* [[VECPTR2:%.*]], align 4 ; CHECK-NEXT: [[EXTRA0:%.*]] = extractelement <2 x double> [[LOADVEC]], i32 0 @@ -601,18 +601,21 @@ ; CHECK-NEXT: [[LOADVEC4:%.*]] = load <2 x double>, <2 x double>* [[VECPTR4:%.*]], align 4 ; CHECK-NEXT: [[EXTRB0:%.*]] = extractelement <2 x double> [[LOADVEC3]], i32 0 ; CHECK-NEXT: [[EXTRB1:%.*]] = extractelement <2 x double> [[LOADVEC4]], i32 1 -; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> poison, double [[EXTRA1]], i32 0 -; CHECK-NEXT: [[TMP4:%.*]] = insertelement <2 x double> [[TMP3]], double [[EXTRB0]], i32 1 -; CHECK-NEXT: [[TMP5:%.*]] = fmul <2 x double> [[TMP4]], [[TMP2]] -; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x double> [[TMP5]], <2 x double> poison, <2 x i32> -; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> poison, double [[EXTRA0]], i32 0 +; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x double> poison, double [[EXTRA0]], i32 0 +; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> [[TMP1]], double [[EXTRA1]], i32 1 +; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> poison, double [[LOADA0]], i32 0 +; CHECK-NEXT: [[TMP4:%.*]] = insertelement <2 x double> [[TMP3]], double [[LOADA0]], i32 1 +; CHECK-NEXT: [[TMP5:%.*]] = fmul <2 x double> [[TMP2]], [[TMP4]] +; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> poison, double [[EXTRB0]], i32 0 ; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x double> [[TMP6]], double [[EXTRB1]], i32 1 -; CHECK-NEXT: [[TMP8:%.*]] = fmul <2 x double> [[TMP7]], [[TMP2]] -; CHECK-NEXT: [[TMP9:%.*]] = fadd <2 x double> [[SHUFFLE]], [[TMP8]] +; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x double> poison, double [[LOADA1]], i32 0 +; CHECK-NEXT: [[TMP9:%.*]] = insertelement <2 x double> [[TMP8]], double [[LOADA1]], i32 1 +; CHECK-NEXT: [[TMP10:%.*]] = fmul <2 x double> [[TMP7]], [[TMP9]] +; CHECK-NEXT: [[TMP11:%.*]] = fadd <2 x double> [[TMP5]], [[TMP10]] ; CHECK-NEXT: [[SIDX0:%.*]] = getelementptr inbounds double, double* [[STOREARRAY:%.*]], i64 0 ; CHECK-NEXT: [[SIDX1:%.*]] = getelementptr inbounds double, double* [[STOREARRAY]], i64 1 -; CHECK-NEXT: [[TMP10:%.*]] = bitcast double* [[SIDX0]] to <2 x double>* -; CHECK-NEXT: store <2 x double> [[TMP9]], <2 x double>* [[TMP10]], align 8 +; CHECK-NEXT: [[TMP12:%.*]] = bitcast double* [[SIDX0]] to <2 x double>* +; CHECK-NEXT: store <2 x double> [[TMP11]], <2 x double>* [[TMP12]], align 8 ; CHECK-NEXT: ret void ; %idx0 = getelementptr inbounds double, double* %array, i64 0 @@ -654,19 +657,18 @@ ; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 8 ; CHECK-NEXT: [[GEP_2_0:%.*]] = getelementptr inbounds double, double* [[ARRAY2:%.*]], i64 0 ; CHECK-NEXT: [[GEP_2_1:%.*]] = getelementptr inbounds double, double* [[ARRAY2]], i64 1 -; CHECK-NEXT: [[TMP2:%.*]] = bitcast double* [[GEP_2_0]] to <2 x double>* -; CHECK-NEXT: [[TMP3:%.*]] = load <2 x double>, <2 x double>* [[TMP2]], align 8 -; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x double> [[TMP3]], <2 x double> poison, <2 x i32> -; CHECK-NEXT: [[TMP4:%.*]] = fmul <2 x double> [[TMP1]], [[SHUFFLE]] -; CHECK-NEXT: [[TMP5:%.*]] = extractelement <2 x double> [[SHUFFLE]], i32 1 -; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> poison, double [[TMP5]], i32 0 -; CHECK-NEXT: [[TMP7:%.*]] = extractelement <2 x double> [[SHUFFLE]], i32 0 -; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x double> [[TMP6]], double [[TMP7]], i32 1 -; CHECK-NEXT: [[TMP9:%.*]] = fmul <2 x double> [[TMP1]], [[TMP8]] -; CHECK-NEXT: [[TMP10:%.*]] = fadd <2 x double> [[TMP4]], [[TMP9]] -; CHECK-NEXT: [[TMP11:%.*]] = extractelement <2 x double> [[TMP10]], i32 0 -; CHECK-NEXT: [[TMP12:%.*]] = extractelement <2 x double> [[TMP10]], i32 1 -; CHECK-NEXT: [[ADD3:%.*]] = fadd double [[TMP11]], [[TMP12]] +; CHECK-NEXT: [[LD_2_0:%.*]] = load double, double* [[GEP_2_0]], align 8 +; CHECK-NEXT: [[LD_2_1:%.*]] = load double, double* [[GEP_2_1]], align 8 +; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[LD_2_0]], i32 0 +; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> [[TMP2]], double [[LD_2_0]], i32 1 +; CHECK-NEXT: [[TMP4:%.*]] = fmul <2 x double> [[TMP1]], [[TMP3]] +; CHECK-NEXT: [[TMP5:%.*]] = insertelement <2 x double> poison, double [[LD_2_1]], i32 0 +; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> [[TMP5]], double [[LD_2_1]], i32 1 +; CHECK-NEXT: [[TMP7:%.*]] = fmul <2 x double> [[TMP1]], [[TMP6]] +; CHECK-NEXT: [[TMP8:%.*]] = fadd <2 x double> [[TMP4]], [[TMP7]] +; CHECK-NEXT: [[TMP9:%.*]] = extractelement <2 x double> [[TMP8]], i32 0 +; CHECK-NEXT: [[TMP10:%.*]] = extractelement <2 x double> [[TMP8]], i32 1 +; CHECK-NEXT: [[ADD3:%.*]] = fadd double [[TMP9]], [[TMP10]] ; CHECK-NEXT: ret double [[ADD3]] ; entry: diff --git a/llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll b/llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll --- a/llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll +++ b/llvm/test/Transforms/SLPVectorizer/X86/operandorder.ll @@ -253,13 +253,16 @@ ; CHECK-NEXT: br label [[LP:%.*]] ; CHECK: lp: ; CHECK-NEXT: [[P:%.*]] = phi double [ 1.000000e+00, [[LP]] ], [ 0.000000e+00, [[ENTRY:%.*]] ] -; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[FROM:%.*]] to <2 x double>* -; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 4 -; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x double> [[TMP1]], <2 x double> poison, <2 x i32> -; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> [[TMP1]], double [[P]], i64 1 -; CHECK-NEXT: [[TMP3:%.*]] = fadd <2 x double> [[TMP2]], [[SHUFFLE]] -; CHECK-NEXT: [[TMP4:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* -; CHECK-NEXT: store <2 x double> [[TMP3]], <2 x double>* [[TMP4]], align 4 +; CHECK-NEXT: [[FROM_1:%.*]] = getelementptr double, double* [[FROM:%.*]], i32 1 +; CHECK-NEXT: [[V0_1:%.*]] = load double, double* [[FROM]], align 4 +; CHECK-NEXT: [[V0_2:%.*]] = load double, double* [[FROM_1]], align 4 +; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x double> poison, double [[V0_2]], i64 0 +; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x double> [[TMP0]], double [[P]], i64 1 +; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[V0_1]], i64 0 +; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <2 x double> [[TMP2]], <2 x double> poison, <2 x i32> zeroinitializer +; CHECK-NEXT: [[TMP4:%.*]] = fadd <2 x double> [[TMP1]], [[TMP3]] +; CHECK-NEXT: [[TMP5:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* +; CHECK-NEXT: store <2 x double> [[TMP4]], <2 x double>* [[TMP5]], align 4 ; CHECK-NEXT: br i1 undef, label [[LP]], label [[EXT:%.*]] ; CHECK: ext: ; CHECK-NEXT: ret void @@ -306,13 +309,16 @@ ; CHECK-NEXT: br label [[LP:%.*]] ; CHECK: lp: ; CHECK-NEXT: [[P:%.*]] = phi double [ 1.000000e+00, [[LP]] ], [ 0.000000e+00, [[ENTRY:%.*]] ] -; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[FROM:%.*]] to <2 x double>* -; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 4 -; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <2 x double> [[TMP1]], <2 x double> poison, <2 x i32> -; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> [[TMP1]], double [[P]], i64 1 -; CHECK-NEXT: [[TMP3:%.*]] = fadd <2 x double> [[SHUFFLE]], [[TMP2]] -; CHECK-NEXT: [[TMP4:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* -; CHECK-NEXT: store <2 x double> [[TMP3]], <2 x double>* [[TMP4]], align 4 +; CHECK-NEXT: [[FROM_1:%.*]] = getelementptr double, double* [[FROM:%.*]], i32 1 +; CHECK-NEXT: [[V0_1:%.*]] = load double, double* [[FROM]], align 4 +; CHECK-NEXT: [[V0_2:%.*]] = load double, double* [[FROM_1]], align 4 +; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x double> poison, double [[V0_1]], i64 0 +; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <2 x double> [[TMP0]], <2 x double> poison, <2 x i32> zeroinitializer +; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[V0_2]], i64 0 +; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> [[TMP2]], double [[P]], i64 1 +; CHECK-NEXT: [[TMP4:%.*]] = fadd <2 x double> [[TMP1]], [[TMP3]] +; CHECK-NEXT: [[TMP5:%.*]] = bitcast double* [[TO:%.*]] to <2 x double>* +; CHECK-NEXT: store <2 x double> [[TMP4]], <2 x double>* [[TMP5]], align 4 ; CHECK-NEXT: br i1 undef, label [[LP]], label [[EXT:%.*]] ; CHECK: ext: ; CHECK-NEXT: ret void