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[LV] Add initial support for vectorizing literal struct return values (#109833)

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This patch adds initial support for vectorizing literal struct return
values. Currently, this is limited to the case where the struct is
homogeneous (all elements have the same type) and not packed. The users
of the call also must all be `extractvalue` instructions.

The intended use case for this is vectorizing intrinsics such as:

```
declare { float, float } @llvm.sincos.f32(float %x)
```

Mapping them to structure-returning library calls such as:

```
declare { <4 x float>, <4 x float> } @Sleef_sincosf4_u10advsimd(<4 x float>)
```

Or their widened form (such as `@llvm.sincos.v4f32` in this case).

Implementing this required two main changes:

1. Supporting widening `extractvalue`
2. Adding support for vectorized struct types in LV
  * This is mostly limited to parts of the cost model and scalarization

Since the supported use case is narrow, the required changes are
relatively small.
This commit is contained in:
Benjamin Maxwell 2025-02-17 09:51:35 +00:00 committed by GitHub
parent 262e4c1987
commit e0e67a6207
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
14 changed files with 580 additions and 103 deletions
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14
llvm/include/llvm/Analysis/TargetTransformInfo.h
View File

@ -1473,6 +1473,12 @@ public:
TTI::TargetCostKind CostKind,
unsigned Index = -1) const;
/// \return The expected cost of aggregate inserts and extracts. This is
/// used when the instruction is not available; a typical use case is to
/// provision the cost of vectorization/scalarization in vectorizer passes.
InstructionCost getInsertExtractValueCost(unsigned Opcode,
TTI::TargetCostKind CostKind) const;
/// \return The cost of replication shuffle of \p VF elements typed \p EltTy
/// \p ReplicationFactor times.
///
@ -2223,6 +2229,9 @@ public:
const APInt &DemandedDstElts,
TTI::TargetCostKind CostKind) = 0;
virtual InstructionCost
getInsertExtractValueCost(unsigned Opcode, TTI::TargetCostKind CostKind) = 0;
virtual InstructionCost
getMemoryOpCost(unsigned Opcode, Type *Src, Align Alignment,
unsigned AddressSpace, TTI::TargetCostKind CostKind,
@ -2950,6 +2959,11 @@ public:
return Impl.getReplicationShuffleCost(EltTy, ReplicationFactor, VF,
DemandedDstElts, CostKind);
}
InstructionCost
getInsertExtractValueCost(unsigned Opcode,
TTI::TargetCostKind CostKind) override {
return Impl.getInsertExtractValueCost(Opcode, CostKind);
}
InstructionCost getMemoryOpCost(unsigned Opcode, Type *Src, Align Alignment,
unsigned AddressSpace,
TTI::TargetCostKind CostKind,

15
llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
View File

@ -745,6 +745,17 @@ public:
return 1;
}
InstructionCost
getInsertExtractValueCost(unsigned Opcode,
TTI::TargetCostKind CostKind) const {
// Note: The `insertvalue` cost here is chosen to match the default case of
// getInstructionCost() -- as pior to adding this helper `insertvalue` was
// not handled.
if (Opcode == Instruction::InsertValue)
return CostKind == TTI::TCK_RecipThroughput ? -1 : TTI::TCC_Basic;
return TTI::TCC_Free;
}
InstructionCost getMemoryOpCost(unsigned Opcode, Type *Src, Align Alignment,
unsigned AddressSpace,
TTI::TargetCostKind CostKind,
@ -1306,9 +1317,11 @@ public:
case Instruction::PHI:
case Instruction::Switch:
return TargetTTI->getCFInstrCost(Opcode, CostKind, I);
case Instruction::ExtractValue:
case Instruction::Freeze:
return TTI::TCC_Free;
case Instruction::ExtractValue:
case Instruction::InsertValue:
return TargetTTI->getInsertExtractValueCost(Opcode, CostKind);
case Instruction::Alloca:
if (cast<AllocaInst>(U)->isStaticAlloca())
return TTI::TCC_Free;

10
llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h
View File

@ -416,10 +416,6 @@ public:
/// has a vectorized variant available.
bool hasVectorCallVariants() const { return VecCallVariantsFound; }
/// Returns true if there is at least one function call in the loop which
/// returns a struct type and needs to be vectorized.
bool hasStructVectorCall() const { return StructVecCallFound; }
unsigned getNumStores() const { return LAI->getNumStores(); }
unsigned getNumLoads() const { return LAI->getNumLoads(); }
@ -639,12 +635,6 @@ private:
/// the use of those function variants.
bool VecCallVariantsFound = false;
/// If we find a call (to be vectorized) that returns a struct type, record
/// that so we can bail out until this is supported.
/// TODO: Remove this flag once vectorizing calls with struct returns is
/// supported.
bool StructVecCallFound = false;
/// Keep track of all the countable and uncountable exiting blocks if
/// the exact backedge taken count is not computable.
SmallVector<BasicBlock *, 4> CountableExitingBlocks;

10
llvm/lib/Analysis/TargetTransformInfo.cpp
View File

@ -1113,6 +1113,16 @@ TargetTransformInfo::getVectorInstrCost(const Instruction &I, Type *Val,
return Cost;
}
InstructionCost TargetTransformInfo::getInsertExtractValueCost(
unsigned Opcode, TTI::TargetCostKind CostKind) const {
assert((Opcode == Instruction::InsertValue ||
Opcode == Instruction::ExtractValue) &&
"Expecting Opcode to be insertvalue/extractvalue.");
InstructionCost Cost = TTIImpl->getInsertExtractValueCost(Opcode, CostKind);
assert(Cost >= 0 && "TTI should not produce negative costs!");
return Cost;
}
InstructionCost TargetTransformInfo::getReplicationShuffleCost(
Type *EltTy, int ReplicationFactor, int VF, const APInt &DemandedDstElts,
TTI::TargetCostKind CostKind) const {

13
llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
View File

@ -954,7 +954,7 @@ bool LoopVectorizationLegality::canVectorizeInstrs() {
if (CI && !VFDatabase::getMappings(*CI).empty())
VecCallVariantsFound = true;
auto CanWidenInstructionTy = [this](Instruction const &Inst) {
auto CanWidenInstructionTy = [](Instruction const &Inst) {
Type *InstTy = Inst.getType();
if (!isa<StructType>(InstTy))
return canVectorizeTy(InstTy);
@ -962,15 +962,8 @@ bool LoopVectorizationLegality::canVectorizeInstrs() {
// For now, we only recognize struct values returned from calls where
// all users are extractvalue as vectorizable. All element types of the
// struct must be types that can be widened.
if (isa<CallInst>(Inst) && canWidenCallReturnType(InstTy) &&
all_of(Inst.users(), IsaPred<ExtractValueInst>)) {
// TODO: Remove the `StructVecCallFound` flag once vectorizing calls
// with struct returns is supported.
StructVecCallFound = true;
return true;
}
return false;
return isa<CallInst>(Inst) && canWidenCallReturnType(InstTy) &&
all_of(Inst.users(), IsaPred<ExtractValueInst>);
};
// Check that the instruction return type is vectorizable.

101
llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
View File

@ -2390,7 +2390,9 @@ void InnerLoopVectorizer::scalarizeInstruction(const Instruction *Instr,
VPReplicateRecipe *RepRecipe,
const VPLane &Lane,
VPTransformState &State) {
assert(!Instr->getType()->isAggregateType() && "Can't handle vectors");
assert((!Instr->getType()->isAggregateType() ||
canVectorizeTy(Instr->getType())) &&
"Expected vectorizable or non-aggregate type.");
// Does this instruction return a value ?
bool IsVoidRetTy = Instr->getType()->isVoidTy();
@ -2900,10 +2902,10 @@ LoopVectorizationCostModel::getVectorCallCost(CallInst *CI,
return ScalarCallCost;
}
static Type *maybeVectorizeType(Type *Elt, ElementCount VF) {
if (VF.isScalar() || (!Elt->isIntOrPtrTy() && !Elt->isFloatingPointTy()))
return Elt;
return VectorType::get(Elt, VF);
static Type *maybeVectorizeType(Type *Ty, ElementCount VF) {
if (VF.isScalar() || !canVectorizeTy(Ty))
return Ty;
return toVectorizedTy(Ty, VF);
}
InstructionCost
@ -3650,13 +3652,15 @@ void LoopVectorizationCostModel::collectLoopUniforms(ElementCount VF) {
}
}
// ExtractValue instructions must be uniform, because the operands are
// known to be loop-invariant.
if (auto *EVI = dyn_cast<ExtractValueInst>(&I)) {
assert(IsOutOfScope(EVI->getAggregateOperand()) &&
"Expected aggregate value to be loop invariant");
AddToWorklistIfAllowed(EVI);
continue;
if (IsOutOfScope(EVI->getAggregateOperand())) {
AddToWorklistIfAllowed(EVI);
continue;
}
// Only ExtractValue instructions where the aggregate value comes from a
// call are allowed to be non-uniform.
assert(isa<CallInst>(EVI->getAggregateOperand()) &&
"Expected aggregate value to be call return value");
}
// If there's no pointer operand, there's nothing to do.
@ -4526,8 +4530,7 @@ static bool willGenerateVectors(VPlan &Plan, ElementCount VF,
llvm_unreachable("unhandled recipe");
}
auto WillWiden = [&TTI, VF](Type *ScalarTy) {
Type *VectorTy = toVectorTy(ScalarTy, VF);
auto WillGenerateTargetVectors = [&TTI, VF](Type *VectorTy) {
unsigned NumLegalParts = TTI.getNumberOfParts(VectorTy);
if (!NumLegalParts)
return false;
@ -4539,7 +4542,7 @@ static bool willGenerateVectors(VPlan &Plan, ElementCount VF,
// explicitly ask TTI about the register class uses for each part.
return NumLegalParts <= VF.getKnownMinValue();
}
// Two or more parts that share a register - are vectorized.
// Two or more elements that share a register - are vectorized.
return NumLegalParts < VF.getKnownMinValue();
};
@ -4558,7 +4561,8 @@ static bool willGenerateVectors(VPlan &Plan, ElementCount VF,
Type *ScalarTy = TypeInfo.inferScalarType(ToCheck);
if (!Visited.insert({ScalarTy}).second)
continue;
if (WillWiden(ScalarTy))
Type *WideTy = toVectorizedTy(ScalarTy, VF);
if (any_of(getContainedTypes(WideTy), WillGenerateTargetVectors))
return true;
}
}
@ -5515,10 +5519,13 @@ InstructionCost LoopVectorizationCostModel::computePredInstDiscount(
// Compute the scalarization overhead of needed insertelement instructions
// and phi nodes.
if (isScalarWithPredication(I, VF) && !I->getType()->isVoidTy()) {
ScalarCost += TTI.getScalarizationOverhead(
cast<VectorType>(toVectorTy(I->getType(), VF)),
APInt::getAllOnes(VF.getFixedValue()), /*Insert*/ true,
/*Extract*/ false, CostKind);
Type *WideTy = toVectorizedTy(I->getType(), VF);
for (Type *VectorTy : getContainedTypes(WideTy)) {
ScalarCost += TTI.getScalarizationOverhead(
cast<VectorType>(VectorTy), APInt::getAllOnes(VF.getFixedValue()),
/*Insert=*/true,
/*Extract=*/false, CostKind);
}
ScalarCost +=
VF.getFixedValue() * TTI.getCFInstrCost(Instruction::PHI, CostKind);
}
@ -5529,15 +5536,18 @@ InstructionCost LoopVectorizationCostModel::computePredInstDiscount(
// overhead.
for (Use &U : I->operands())
if (auto *J = dyn_cast<Instruction>(U.get())) {
assert(VectorType::isValidElementType(J->getType()) &&
assert(canVectorizeTy(J->getType()) &&
"Instruction has non-scalar type");
if (CanBeScalarized(J))
Worklist.push_back(J);
else if (needsExtract(J, VF)) {
ScalarCost += TTI.getScalarizationOverhead(
cast<VectorType>(toVectorTy(J->getType(), VF)),
APInt::getAllOnes(VF.getFixedValue()), /*Insert*/ false,
/*Extract*/ true, CostKind);
Type *WideTy = toVectorizedTy(J->getType(), VF);
for (Type *VectorTy : getContainedTypes(WideTy)) {
ScalarCost += TTI.getScalarizationOverhead(
cast<VectorType>(VectorTy),
APInt::getAllOnes(VF.getFixedValue()), /*Insert*/ false,
/*Extract*/ true, CostKind);
}
}
}
@ -6016,13 +6026,17 @@ LoopVectorizationCostModel::getScalarizationOverhead(Instruction *I,
return 0;
InstructionCost Cost = 0;
Type *RetTy = toVectorTy(I->getType(), VF);
Type *RetTy = toVectorizedTy(I->getType(), VF);
if (!RetTy->isVoidTy() &&
(!isa<LoadInst>(I) || !TTI.supportsEfficientVectorElementLoadStore()))
Cost += TTI.getScalarizationOverhead(
cast<VectorType>(RetTy), APInt::getAllOnes(VF.getKnownMinValue()),
/*Insert*/ true,
/*Extract*/ false, CostKind);
(!isa<LoadInst>(I) || !TTI.supportsEfficientVectorElementLoadStore())) {
for (Type *VectorTy : getContainedTypes(RetTy)) {
Cost += TTI.getScalarizationOverhead(
cast<VectorType>(VectorTy), APInt::getAllOnes(VF.getKnownMinValue()),
/*Insert=*/true,
/*Extract=*/false, CostKind);
}
}
// Some targets keep addresses scalar.
if (isa<LoadInst>(I) && !TTI.prefersVectorizedAddressing())
@ -6280,9 +6294,9 @@ void LoopVectorizationCostModel::setVectorizedCallDecision(ElementCount VF) {
bool MaskRequired = Legal->isMaskRequired(CI);
// Compute corresponding vector type for return value and arguments.
Type *RetTy = toVectorTy(ScalarRetTy, VF);
Type *RetTy = toVectorizedTy(ScalarRetTy, VF);
for (Type *ScalarTy : ScalarTys)
Tys.push_back(toVectorTy(ScalarTy, VF));
Tys.push_back(toVectorizedTy(ScalarTy, VF));
// An in-loop reduction using an fmuladd intrinsic is a special case;
// we don't want the normal cost for that intrinsic.
@ -6459,7 +6473,7 @@ LoopVectorizationCostModel::getInstructionCost(Instruction *I,
HasSingleCopyAfterVectorization(I, VF));
VectorTy = RetTy;
} else
VectorTy = toVectorTy(RetTy, VF);
VectorTy = toVectorizedTy(RetTy, VF);
if (VF.isVector() && VectorTy->isVectorTy() &&
!TTI.getNumberOfParts(VectorTy))
@ -8601,7 +8615,7 @@ VPWidenRecipe *VPRecipeBuilder::tryToWiden(Instruction *I,
case Instruction::Shl:
case Instruction::Sub:
case Instruction::Xor:
case Instruction::Freeze:
case Instruction::Freeze: {
SmallVector<VPValue *> NewOps(Operands);
if (Instruction::isBinaryOp(I->getOpcode())) {
// The legacy cost model uses SCEV to check if some of the operands are
@ -8626,6 +8640,16 @@ VPWidenRecipe *VPRecipeBuilder::tryToWiden(Instruction *I,
NewOps[1] = GetConstantViaSCEV(NewOps[1]);
}
return new VPWidenRecipe(*I, make_range(NewOps.begin(), NewOps.end()));
}
case Instruction::ExtractValue: {
SmallVector<VPValue *> NewOps(Operands);
Type *I32Ty = IntegerType::getInt32Ty(I->getContext());
auto *EVI = cast<ExtractValueInst>(I);
assert(EVI->getNumIndices() == 1 && "Expected one extractvalue index");
unsigned Idx = EVI->getIndices()[0];
NewOps.push_back(Plan.getOrAddLiveIn(ConstantInt::get(I32Ty, Idx, false)));
return new VPWidenRecipe(*I, make_range(NewOps.begin(), NewOps.end()));
}
};
}
@ -9928,7 +9952,7 @@ void VPReplicateRecipe::execute(VPTransformState &State) {
VectorType::get(UI->getType(), State.VF));
State.set(this, Poison);
}
State.packScalarIntoVectorValue(this, *State.Lane);
State.packScalarIntoVectorizedValue(this, *State.Lane);
}
return;
}
@ -10445,13 +10469,6 @@ bool LoopVectorizePass::processLoop(Loop *L) {
return false;
}
if (LVL.hasStructVectorCall()) {
reportVectorizationFailure("Auto-vectorization of calls that return struct "
"types is not yet supported",
"StructCallVectorizationUnsupported", ORE, L);
return false;
}
// Entrance to the VPlan-native vectorization path. Outer loops are processed
// here. They may require CFG and instruction level transformations before
// even evaluating whether vectorization is profitable. Since we cannot modify

27
llvm/lib/Transforms/Vectorize/VPlan.cpp
View File

@ -336,10 +336,10 @@ Value *VPTransformState::get(VPValue *Def, bool NeedsScalar) {
} else {
// Initialize packing with insertelements to start from undef.
assert(!VF.isScalable() && "VF is assumed to be non scalable.");
Value *Undef = PoisonValue::get(VectorType::get(LastInst->getType(), VF));
Value *Undef = PoisonValue::get(toVectorizedTy(LastInst->getType(), VF));
set(Def, Undef);
for (unsigned Lane = 0; Lane < VF.getKnownMinValue(); ++Lane)
packScalarIntoVectorValue(Def, Lane);
packScalarIntoVectorizedValue(Def, Lane);
VectorValue = get(Def);
}
Builder.restoreIP(OldIP);
@ -392,13 +392,24 @@ void VPTransformState::setDebugLocFrom(DebugLoc DL) {
Builder.SetCurrentDebugLocation(DIL);
}
void VPTransformState::packScalarIntoVectorValue(VPValue *Def,
const VPLane &Lane) {
void VPTransformState::packScalarIntoVectorizedValue(VPValue *Def,
const VPLane &Lane) {
Value *ScalarInst = get(Def, Lane);
Value *VectorValue = get(Def);
VectorValue = Builder.CreateInsertElement(VectorValue, ScalarInst,
Lane.getAsRuntimeExpr(Builder, VF));
set(Def, VectorValue);
Value *WideValue = get(Def);
Value *LaneExpr = Lane.getAsRuntimeExpr(Builder, VF);
if (auto *StructTy = dyn_cast<StructType>(WideValue->getType())) {
// We must handle each element of a vectorized struct type.
for (unsigned I = 0, E = StructTy->getNumElements(); I != E; I++) {
Value *ScalarValue = Builder.CreateExtractValue(ScalarInst, I);
Value *VectorValue = Builder.CreateExtractValue(WideValue, I);
VectorValue =
Builder.CreateInsertElement(VectorValue, ScalarValue, LaneExpr);
WideValue = Builder.CreateInsertValue(WideValue, VectorValue, I);
}
} else {
WideValue = Builder.CreateInsertElement(WideValue, ScalarInst, LaneExpr);
}
set(Def, WideValue);
}
BasicBlock *VPBasicBlock::createEmptyBasicBlock(VPTransformState &State) {

6
llvm/lib/Transforms/Vectorize/VPlanAnalysis.cpp
View File

@ -125,6 +125,12 @@ Type *VPTypeAnalysis::inferScalarTypeForRecipe(const VPWidenRecipe *R) {
case Instruction::FNeg:
case Instruction::Freeze:
return inferScalarType(R->getOperand(0));
case Instruction::ExtractValue: {
assert(R->getNumOperands() == 2 && "expected single level extractvalue");
auto *StructTy = cast<StructType>(inferScalarType(R->getOperand(0)));
auto *CI = cast<ConstantInt>(R->getOperand(1)->getLiveInIRValue());
return StructTy->getTypeAtIndex(CI->getZExtValue());
}
default:
break;
}

7
llvm/lib/Transforms/Vectorize/VPlanHelpers.h
View File

@ -241,7 +241,7 @@ struct VPTransformState {
set(Def, V, VPLane(0));
return;
}
assert((VF.isScalar() || V->getType()->isVectorTy()) &&
assert((VF.isScalar() || isVectorizedTy(V->getType())) &&
"scalar values must be stored as (0, 0)");
Data.VPV2Vector[Def] = V;
}
@ -290,8 +290,9 @@ struct VPTransformState {
/// Set the debug location in the builder using the debug location \p DL.
void setDebugLocFrom(DebugLoc DL);
/// Construct the vector value of a scalarized value \p V one lane at a time.
void packScalarIntoVectorValue(VPValue *Def, const VPLane &Lane);
/// Construct the vectorized value of a scalarized value \p V one lane at a
/// time.
void packScalarIntoVectorizedValue(VPValue *Def, const VPLane &Lane);
/// Hold state information used when constructing the CFG of the output IR,
/// traversing the VPBasicBlocks and generating corresponding IR BasicBlocks.

14
llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
View File

@ -1169,7 +1169,7 @@ InstructionCost VPWidenIntrinsicRecipe::computeCost(ElementCount VF,
Arguments.push_back(V);
}
Type *RetTy = toVectorTy(Ctx.Types.inferScalarType(this), VF);
Type *RetTy = toVectorizedTy(Ctx.Types.inferScalarType(this), VF);
SmallVector<Type *> ParamTys;
for (unsigned I = 0; I != getNumOperands(); ++I)
ParamTys.push_back(
@ -1475,6 +1475,14 @@ void VPWidenRecipe::execute(VPTransformState &State) {
State.addMetadata(V, dyn_cast_or_null<Instruction>(getUnderlyingValue()));
break;
}
case Instruction::ExtractValue: {
assert(getNumOperands() == 2 && "expected single level extractvalue");
Value *Op = State.get(getOperand(0));
auto *CI = cast<ConstantInt>(getOperand(1)->getLiveInIRValue());
Value *Extract = Builder.CreateExtractValue(Op, CI->getZExtValue());
State.set(this, Extract);
break;
}
case Instruction::Freeze: {
Value *Op = State.get(getOperand(0));
@ -1576,6 +1584,10 @@ InstructionCost VPWidenRecipe::computeCost(ElementCount VF,
return Ctx.TTI.getArithmeticInstrCost(Instruction::Mul, VectorTy,
Ctx.CostKind);
}
case Instruction::ExtractValue: {
return Ctx.TTI.getInsertExtractValueCost(Instruction::ExtractValue,
Ctx.CostKind);
}
case Instruction::ICmp:
case Instruction::FCmp: {
Instruction *CtxI = dyn_cast_or_null<Instruction>(getUnderlyingValue());

34
llvm/test/Transforms/LoopVectorize/AArch64/scalable-struct-return.ll
View File

@ -1,15 +1,18 @@
; RUN: opt < %s -mattr=+sve -passes=loop-vectorize -force-vector-interleave=1 -prefer-predicate-over-epilogue=predicate-dont-vectorize -S -pass-remarks-analysis=loop-vectorize 2>%t | FileCheck %s
; RUN: cat %t | FileCheck --check-prefix=CHECK-REMARKS %s
; RUN: opt < %s -mattr=+sve -passes=loop-vectorize -force-vector-interleave=1 -prefer-predicate-over-epilogue=predicate-dont-vectorize -S | FileCheck %s
target triple = "aarch64-unknown-linux-gnu"
; Tests basic vectorization of scalable homogeneous struct literal returns.
; TODO: Support vectorization in this case.
; CHECK-REMARKS: remark: {{.*}} loop not vectorized: Auto-vectorization of calls that return struct types is not yet supported
define void @struct_return_f32_widen(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_f32_widen
; CHECK-NOT: vector.body:
; CHECK-SAME: (ptr noalias [[IN:%.*]], ptr noalias writeonly [[OUT_A:%.*]], ptr noalias writeonly [[OUT_B:%.*]])
; CHECK: vector.body:
; CHECK: [[WIDE_CALL:%.*]] = call { <vscale x 4 x float>, <vscale x 4 x float> } @scalable_vec_masked_foo(<vscale x 4 x float> [[WIDE_MASKED_LOAD:%.*]], <vscale x 4 x i1> [[ACTIVE_LANE_MASK:%.*]])
; CHECK: [[WIDE_A:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[WIDE_CALL]], 0
; CHECK: [[WIDE_B:%.*]] = extractvalue { <vscale x 4 x float>, <vscale x 4 x float> } [[WIDE_CALL]], 1
; CHECK: call void @llvm.masked.store.nxv4f32.p0(<vscale x 4 x float> [[WIDE_A]], ptr {{%.*}}, i32 4, <vscale x 4 x i1> [[ACTIVE_LANE_MASK]])
; CHECK: call void @llvm.masked.store.nxv4f32.p0(<vscale x 4 x float> [[WIDE_B]], ptr {{%.*}}, i32 4, <vscale x 4 x i1> [[ACTIVE_LANE_MASK]])
entry:
br label %for.body
@ -32,11 +35,15 @@ exit:
ret void
}
; TODO: Support vectorization in this case.
; CHECK-REMARKS: remark: {{.*}} loop not vectorized: Auto-vectorization of calls that return struct types is not yet supported
define void @struct_return_f64_widen(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_f64_widen
; CHECK-NOT: vector.body:
; CHECK-SAME: (ptr noalias [[IN:%.*]], ptr noalias writeonly [[OUT_A:%.*]], ptr noalias writeonly [[OUT_B:%.*]])
; CHECK: vector.body:
; CHECK: [[WIDE_CALL:%.*]] = call { <vscale x 2 x double>, <vscale x 2 x double> } @scalable_vec_masked_bar(<vscale x 2 x double> [[WIDE_MASKED_LOAD:%.*]], <vscale x 2 x i1> [[ACTIVE_LANE_MASK:%.*]])
; CHECK: [[WIDE_A:%.*]] = extractvalue { <vscale x 2 x double>, <vscale x 2 x double> } [[WIDE_CALL]], 0
; CHECK: [[WIDE_B:%.*]] = extractvalue { <vscale x 2 x double>, <vscale x 2 x double> } [[WIDE_CALL]], 1
; CHECK: call void @llvm.masked.store.nxv2f64.p0(<vscale x 2 x double> [[WIDE_A]], ptr {{%.*}}, i32 8, <vscale x 2 x i1> [[ACTIVE_LANE_MASK]])
; CHECK: call void @llvm.masked.store.nxv2f64.p0(<vscale x 2 x double> [[WIDE_B]], ptr {{%.*}}, i32 8, <vscale x 2 x i1> [[ACTIVE_LANE_MASK]])
entry:
br label %for.body
@ -59,11 +66,16 @@ exit:
ret void
}
; TODO: Support vectorization in this case.
; CHECK-REMARKS: remark: {{.*}} loop not vectorized: Auto-vectorization of calls that return struct types is not yet supported
define void @struct_return_f32_widen_rt_checks(ptr %in, ptr writeonly %out_a, ptr writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_f32_widen_rt_checks
; CHECK-NOT: vector.body:
; CHECK-SAME: (ptr [[IN:%.*]], ptr writeonly [[OUT_A:%.*]], ptr writeonly [[OUT_B:%.*]])
; CHECK: entry:
; CHECK: br i1 false, label %scalar.ph, label %vector.memcheck
; CHECK: vector.memcheck:
; CHECK: vector.body:
; CHECK: call { <vscale x 4 x float>, <vscale x 4 x float> } @scalable_vec_masked_foo(<vscale x 4 x float> [[WIDE_MASKED_LOAD:%.*]], <vscale x 4 x i1> [[ACTIVE_LANE_MASK:%.*]])
; CHECK: for.body:
; CHECK: call { float, float } @foo(float [[LOAD:%.*]])
entry:
br label %for.body

199
llvm/test/Transforms/LoopVectorize/AArch64/struct-return-cost.ll Normal file
View File

@ -0,0 +1,199 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --filter "(:|@)" --version 5
; RUN: opt -passes=loop-vectorize -debug-only=loop-vectorize < %s -S -o - 2>%t | FileCheck %s
; RUN: cat %t | FileCheck %s --check-prefix=CHECK-COST
; REQUIRES: asserts
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64--linux-gnu"
; CHECK-COST-LABEL: struct_return_widen
; CHECK-COST: LV: Found an estimated cost of 10 for VF 1 For instruction: %call = tail call { half, half } @foo(half %in_val)
; CHECK-COST: LV: Found an estimated cost of 0 for VF 1 For instruction: %extract_a = extractvalue { half, half } %call, 0
; CHECK-COST: LV: Found an estimated cost of 0 for VF 1 For instruction: %extract_b = extractvalue { half, half } %call, 1
;
; CHECK-COST: Cost of 10 for VF 2: WIDEN-CALL ir<%call> = call @foo(ir<%in_val>) (using library function: fixed_vec_foo)
; CHECK-COST: Cost of 0 for VF 2: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 2: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of 58 for VF 4: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF 4: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 4: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of 122 for VF 8: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF 8: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 8: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
define void @struct_return_widen(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_widen(
; CHECK-SAME: ptr noalias [[IN:%.*]], ptr noalias writeonly [[OUT_A:%.*]], ptr noalias writeonly [[OUT_B:%.*]]) {
; CHECK: [[ENTRY:.*:]]
; CHECK: [[VECTOR_PH:.*:]]
; CHECK: [[VECTOR_BODY:.*:]]
; CHECK: [[TMP2:%.*]] = call { <2 x half>, <2 x half> } @fixed_vec_foo(<2 x half> [[WIDE_LOAD:%.*]])
; CHECK: [[TMP3:%.*]] = call { <2 x half>, <2 x half> } @fixed_vec_foo(<2 x half> [[WIDE_LOAD1:%.*]])
; CHECK: [[MIDDLE_BLOCK:.*:]]
; CHECK: [[SCALAR_PH:.*:]]
; CHECK: [[FOR_BODY:.*:]]
; CHECK: [[CALL:%.*]] = tail call { half, half } @foo(half [[IN_VAL:%.*]]) #[[ATTR2:[0-9]+]]
; CHECK: [[EXIT:.*:]]
;
entry:
br label %for.body
for.body:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
%arrayidx = getelementptr inbounds half, ptr %in, i64 %iv
%in_val = load half, ptr %arrayidx, align 2
%call = tail call { half, half } @foo(half %in_val) #0
%extract_a = extractvalue { half, half } %call, 0
%extract_b = extractvalue { half, half } %call, 1
%arrayidx2 = getelementptr inbounds half, ptr %out_a, i64 %iv
store half %extract_a, ptr %arrayidx2, align 2
%arrayidx4 = getelementptr inbounds half, ptr %out_b, i64 %iv
store half %extract_b, ptr %arrayidx4, align 2
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, 1024
br i1 %exitcond.not, label %exit, label %for.body
exit:
ret void
}
; CHECK-COST-LABEL: struct_return_replicate
; CHECK-COST: LV: Found an estimated cost of 10 for VF 1 For instruction: %call = tail call { half, half } @foo(half %in_val)
; CHECK-COST: LV: Found an estimated cost of 0 for VF 1 For instruction: %extract_a = extractvalue { half, half } %call, 0
; CHECK-COST: LV: Found an estimated cost of 0 for VF 1 For instruction: %extract_b = extractvalue { half, half } %call, 1
;
; CHECK-COST: Cost of 26 for VF 2: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF 2: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 2: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of 58 for VF 4: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF 4: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 4: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of 122 for VF 8: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF 8: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 8: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
define void @struct_return_replicate(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_replicate(
; CHECK-SAME: ptr noalias [[IN:%.*]], ptr noalias writeonly [[OUT_A:%.*]], ptr noalias writeonly [[OUT_B:%.*]]) {
; CHECK: [[ENTRY:.*:]]
; CHECK: [[VECTOR_PH:.*:]]
; CHECK: [[VECTOR_BODY:.*:]]
; CHECK: [[TMP4:%.*]] = tail call { half, half } @foo(half [[TMP3:%.*]]) #[[ATTR3:[0-9]+]]
; CHECK: [[TMP6:%.*]] = tail call { half, half } @foo(half [[TMP5:%.*]]) #[[ATTR3]]
; CHECK: [[MIDDLE_BLOCK:.*:]]
; CHECK: [[SCALAR_PH:.*:]]
; CHECK: [[FOR_BODY:.*:]]
; CHECK: [[CALL:%.*]] = tail call { half, half } @foo(half [[IN_VAL:%.*]]) #[[ATTR3]]
; CHECK: [[EXIT:.*:]]
;
entry:
br label %for.body
for.body:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
%arrayidx = getelementptr inbounds half, ptr %in, i64 %iv
%in_val = load half, ptr %arrayidx, align 2
; #1 does not have a fixed-size vector mapping (so replication is used)
%call = tail call { half, half } @foo(half %in_val) #1
%extract_a = extractvalue { half, half } %call, 0
%extract_b = extractvalue { half, half } %call, 1
%arrayidx2 = getelementptr inbounds half, ptr %out_a, i64 %iv
store half %extract_a, ptr %arrayidx2, align 2
%arrayidx4 = getelementptr inbounds half, ptr %out_b, i64 %iv
store half %extract_b, ptr %arrayidx4, align 2
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, 1024
br i1 %exitcond.not, label %exit, label %for.body
exit:
ret void
}
; CHECK-COST-LABEL: struct_return_scalable
; CHECK-COST: LV: Found an estimated cost of 10 for VF 1 For instruction: %call = tail call { half, half } @foo(half %in_val)
; CHECK-COST: LV: Found an estimated cost of 0 for VF 1 For instruction: %extract_a = extractvalue { half, half } %call, 0
; CHECK-COST: LV: Found an estimated cost of 0 for VF 1 For instruction: %extract_b = extractvalue { half, half } %call, 1
;
; CHECK-COST: Cost of 26 for VF 2: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF 2: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 2: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of 58 for VF 4: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF 4: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 4: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of 122 for VF 8: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF 8: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF 8: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of Invalid for VF vscale x 1: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF vscale x 1: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF vscale x 1: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of Invalid for VF vscale x 2: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF vscale x 2: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF vscale x 2: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of Invalid for VF vscale x 4: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-COST: Cost of 0 for VF vscale x 4: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF vscale x 4: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
;
; CHECK-COST: Cost of 10 for VF vscale x 8: WIDEN-CALL ir<%call> = call @foo(ir<%in_val>, ir<true>) (using library function: scalable_vec_masked_foo)
; CHECK-COST: Cost of 0 for VF vscale x 8: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-COST: Cost of 0 for VF vscale x 8: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
define void @struct_return_scalable(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) #2 {
; CHECK-LABEL: define void @struct_return_scalable(
; CHECK-SAME: ptr noalias [[IN:%.*]], ptr noalias writeonly [[OUT_A:%.*]], ptr noalias writeonly [[OUT_B:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK: [[ENTRY:.*:]]
; CHECK: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; CHECK: [[VECTOR_PH:.*:]]
; CHECK: [[TMP2:%.*]] = call i64 @llvm.vscale.i64()
; CHECK: [[TMP4:%.*]] = call i64 @llvm.vscale.i64()
; CHECK: [[VECTOR_BODY:.*:]]
; CHECK: [[TMP9:%.*]] = call i64 @llvm.vscale.i64()
; CHECK: [[TMP12:%.*]] = call { <vscale x 8 x half>, <vscale x 8 x half> } @scalable_vec_masked_foo(<vscale x 8 x half> [[WIDE_LOAD:%.*]], <vscale x 8 x i1> splat (i1 true))
; CHECK: [[TMP13:%.*]] = call { <vscale x 8 x half>, <vscale x 8 x half> } @scalable_vec_masked_foo(<vscale x 8 x half> [[WIDE_LOAD1:%.*]], <vscale x 8 x i1> splat (i1 true))
; CHECK: [[TMP20:%.*]] = call i64 @llvm.vscale.i64()
; CHECK: [[TMP25:%.*]] = call i64 @llvm.vscale.i64()
; CHECK: [[MIDDLE_BLOCK:.*:]]
; CHECK: [[SCALAR_PH:.*:]]
; CHECK: [[FOR_BODY:.*:]]
; CHECK: [[CALL:%.*]] = tail call { half, half } @foo(half [[IN_VAL:%.*]]) #[[ATTR3]]
; CHECK: [[EXIT:.*:]]
;
entry:
br label %for.body
for.body:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
%arrayidx = getelementptr inbounds half, ptr %in, i64 %iv
%in_val = load half, ptr %arrayidx, align 2
%call = tail call { half, half } @foo(half %in_val) #1
%extract_a = extractvalue { half, half } %call, 0
%extract_b = extractvalue { half, half } %call, 1
%arrayidx2 = getelementptr inbounds half, ptr %out_a, i64 %iv
store half %extract_a, ptr %arrayidx2, align 2
%arrayidx4 = getelementptr inbounds half, ptr %out_b, i64 %iv
store half %extract_b, ptr %arrayidx4, align 2
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, 1024
br i1 %exitcond.not, label %exit, label %for.body
exit:
ret void
}
declare { half, half } @foo(half)
declare { <2 x half>, <2 x half> } @fixed_vec_foo(<2 x half>)
declare { <vscale x 8 x half>, <vscale x 8 x half> } @scalable_vec_masked_foo(<vscale x 8 x half>, <vscale x 8 x i1>)
attributes #0 = { nounwind "vector-function-abi-variant"="_ZGVnN2v_foo(fixed_vec_foo)" }
attributes #1 = { nounwind "vector-function-abi-variant"="_ZGVsMxv_foo(scalable_vec_masked_foo)" }
attributes #2 = { "target-features"="+sve" }

111
llvm/test/Transforms/LoopVectorize/struct-return.ll
View File

@ -1,15 +1,20 @@
; RUN: opt < %s -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -S -pass-remarks-analysis=loop-vectorize 2>%t | FileCheck %s
; RUN: opt < %s -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -S -pass-remarks=loop-vectorize -pass-remarks-analysis=loop-vectorize 2>%t | FileCheck %s
; RUN: cat %t | FileCheck --check-prefix=CHECK-REMARKS %s
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
; Tests basic vectorization of homogeneous struct literal returns.
; TODO: Support vectorization in this case.
; CHECK-REMARKS: remark: {{.*}} loop not vectorized: Auto-vectorization of calls that return struct types is not yet supported
; CHECK-REMARKS: remark: {{.*}} vectorized loop
define void @struct_return_f32_widen(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_f32_widen
; CHECK-NOT: vector.body:
; CHECK-SAME: (ptr noalias [[IN:%.*]], ptr noalias writeonly [[OUT_A:%.*]], ptr noalias writeonly [[OUT_B:%.*]])
; CHECK: vector.body:
; CHECK: [[WIDE_CALL:%.*]] = call { <2 x float>, <2 x float> } @fixed_vec_foo(<2 x float> [[WIDE_LOAD:%.*]])
; CHECK: [[WIDE_A:%.*]] = extractvalue { <2 x float>, <2 x float> } [[WIDE_CALL]], 0
; CHECK: [[WIDE_B:%.*]] = extractvalue { <2 x float>, <2 x float> } [[WIDE_CALL]], 1
; CHECK: store <2 x float> [[WIDE_A]], ptr {{%.*}}, align 4
; CHECK: store <2 x float> [[WIDE_B]], ptr {{%.*}}, align 4
entry:
br label %for.body
@ -32,11 +37,16 @@ exit:
ret void
}
; TODO: Support vectorization in this case.
; CHECK-REMARKS: remark: {{.*}} loop not vectorized: Auto-vectorization of calls that return struct types is not yet supported
; CHECK-REMARKS: remark: {{.*}} vectorized loop
define void @struct_return_f64_widen(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_f64_widen
; CHECK-NOT: vector.body:
; CHECK-SAME: (ptr noalias [[IN:%.*]], ptr noalias writeonly [[OUT_A:%.*]], ptr noalias writeonly [[OUT_B:%.*]])
; CHECK: vector.body:
; CHECK: [[WIDE_CALL:%.*]] = call { <2 x double>, <2 x double> } @fixed_vec_bar(<2 x double> [[WIDE_LOAD:%.*]])
; CHECK: [[WIDE_A:%.*]] = extractvalue { <2 x double>, <2 x double> } [[WIDE_CALL]], 0
; CHECK: [[WIDE_B:%.*]] = extractvalue { <2 x double>, <2 x double> } [[WIDE_CALL]], 1
; CHECK: store <2 x double> [[WIDE_A]], ptr {{%.*}}, align 8
; CHECK: store <2 x double> [[WIDE_B]], ptr {{%.*}}, align 8
entry:
br label %for.body
@ -59,11 +69,36 @@ exit:
ret void
}
; TODO: Support vectorization in this case.
; CHECK-REMARKS: remark: {{.*}} loop not vectorized: Auto-vectorization of calls that return struct types is not yet supported
; CHECK-REMARKS: remark: {{.*}} vectorized loop
; Note: Later instcombines reduce this down quite a lot.
define void @struct_return_f32_replicate(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_f32_replicate
; CHECK-NOT: vector.body:
; CHECK-SAME: (ptr noalias [[IN:%.*]], ptr noalias writeonly [[OUT_A:%.*]], ptr noalias writeonly [[OUT_B:%.*]])
; CHECK: vector.body:
; CHECK: [[CALL_LANE_0:%.*]] = tail call { float, float } @foo(float {{%.*}})
; CHECK: [[CALL_LANE_1:%.*]] = tail call { float, float } @foo(float {{%.*}})
; // Lane 0
; CHECK: [[A_0:%.*]] = extractvalue { float, float } [[CALL_LANE_0]], 0
; CHECK: [[VEC_A_0:%.*]] = insertelement <2 x float> poison, float [[A_0]], i32 0
; CHECK: [[WIDE_A_0:%.*]] = insertvalue { <2 x float>, <2 x float> } poison, <2 x float> [[VEC_A_0]], 0
; CHECK: [[B_0:%.*]] = extractvalue { float, float } [[CALL_LANE_0]], 1
; CHECK: [[UNDEF_B_0:%.*]] = extractvalue { <2 x float>, <2 x float> } [[WIDE_A_0]], 1
; CHECK: [[VEC_B_0:%.*]] = insertelement <2 x float> [[UNDEF_B_0]], float [[B_0]], i32 0
; CHECK: [[WIDE_0:%.*]] = insertvalue { <2 x float>, <2 x float> } [[WIDE_A_0]], <2 x float> [[VEC_B_0]], 1
; // Lane 1
; CHECK: [[A_1:%.*]] = extractvalue { float, float } [[CALL_LANE_1]], 0
; CHECK: [[VEC_A_0_EXT:%.*]] = extractvalue { <2 x float>, <2 x float> } [[WIDE_0]], 0
; CHECK: [[VEC_A:%.*]] = insertelement <2 x float> [[VEC_A_0_EXT]], float [[A_1]], i32 1
; CHECK: [[WIDE_A:%.*]] = insertvalue { <2 x float>, <2 x float> } [[WIDE_0]], <2 x float> [[VEC_A]], 0
; CHECK: [[B_1:%.*]] = extractvalue { float, float } [[CALL_LANE_1]], 1
; CHECK: [[VEC_B_0_EXT:%.*]] = extractvalue { <2 x float>, <2 x float> } [[WIDE_A]], 1
; CHECK: [[VEC_B:%.*]] = insertelement <2 x float> [[VEC_B_0_EXT]], float [[B_1]], i32 1
; CHECK: [[WIDE:%.*]] = insertvalue { <2 x float>, <2 x float> } [[WIDE_A]], <2 x float> [[VEC_B]], 1
; // Store wide values:
; CHECK: [[VEC_A_EXT:%.*]] = extractvalue { <2 x float>, <2 x float> } [[WIDE]], 0
; CHECK: [[VEC_B_EXT:%.*]] = extractvalue { <2 x float>, <2 x float> } [[WIDE]], 1
; CHECK: store <2 x float> [[VEC_A_EXT]], ptr {{%.*}}, align 4
; CHECK: store <2 x float> [[VEC_B_EXT]], ptr {{%.*}}, align 4
entry:
br label %for.body
@ -87,11 +122,17 @@ exit:
ret void
}
; TODO: Support vectorization in this case.
; CHECK-REMARKS: remark: {{.*}} loop not vectorized: Auto-vectorization of calls that return struct types is not yet supported
; CHECK-REMARKS: remark: {{.*}} vectorized loop
define void @struct_return_f32_widen_rt_checks(ptr %in, ptr writeonly %out_a, ptr writeonly %out_b) {
; CHECK-LABEL: define void @struct_return_f32_widen_rt_checks
; CHECK-NOT: vector.body:
; CHECK-SAME: (ptr [[IN:%.*]], ptr writeonly [[OUT_A:%.*]], ptr writeonly [[OUT_B:%.*]])
; CHECK: entry:
; CHECK: br i1 false, label %scalar.ph, label %vector.memcheck
; CHECK: vector.memcheck:
; CHECK: vector.body:
; CHECK: call { <2 x float>, <2 x float> } @fixed_vec_foo(<2 x float> [[WIDE_LOAD:%.*]])
; CHECK: for.body:
; CHECK call { float, float } @foo(float [[LOAD:%.*]])
entry:
br label %for.body
@ -143,11 +184,11 @@ exit:
ret void
}
; TODO: Support vectorization in this case.
; CHECK-REMARKS: remark: {{.*}} loop not vectorized: Auto-vectorization of calls that return struct types is not yet supported
; CHECK-REMARKS: remark: {{.*}} vectorized loop
define void @struct_return_i32_three_results_widen(ptr noalias %in, ptr noalias writeonly %out_a) {
; CHECK-LABEL: define void @struct_return_i32_three_results_widen
; CHECK-NOT: vector.body:
; CHECK: vector.body:
; CHECK: call { <2 x i32>, <2 x i32>, <2 x i32> } @fixed_vec_qux(<2 x i32> [[WIDE_LOAD:%.*]])
entry:
br label %for.body
@ -167,6 +208,40 @@ exit:
ret void
}
; Test crafted to exercise computePredInstDiscount with struct results
; (mainly it does not crash).
; CHECK-REMARKS: remark: {{.*}} vectorized loop
define void @scalarized_predicated_struct_return(ptr %a) optsize {
; CHECK-LABEL: define void @scalarized_predicated_struct_return
; CHECK: vector.body:
; CHECK: pred.store.if:
; CHECK: tail call { i64, i64 } @bar_i64(i64 %5)
entry:
br label %for.body
for.body:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.inc ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %iv
%in_val = load i64, ptr %arrayidx, align 8
%sgt_zero = icmp sgt i64 %in_val, 0
br i1 %sgt_zero, label %if.then, label %for.inc
if.then:
%call = tail call { i64, i64 } @bar_i64(i64 %in_val) #6
%extract_a = extractvalue { i64, i64 } %call, 0
%div = udiv i64 %extract_a, %in_val
store i64 %div, ptr %arrayidx, align 8
br label %for.inc
for.inc:
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, 1024
br i1 %exitcond.not, label %exit, label %for.body
exit:
ret void
}
; Negative test. Widening structs of vectors is not supported.
; CHECK-REMARKS-COUNT: remark: {{.*}} loop not vectorized: instruction return type cannot be vectorized
define void @negative_struct_of_vectors(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
@ -390,13 +465,14 @@ declare { [2 x float] } @foo_arrays(float)
declare { float, [1 x float] } @foo_one_non_widenable_element(float)
declare { <1 x float>, <1 x float> } @foo_vectors(<1 x float>)
declare { i32, i32, i32 } @qux(i32)
declare { i64, i64 } @bar_i64(i64)
declare { <2 x float>, <2 x float> } @fixed_vec_foo(<2 x float>)
declare { <2 x double>, <2 x double> } @fixed_vec_bar(<2 x double>)
declare { <2 x float>, <2 x i32> } @fixed_vec_baz(<2 x float>)
declare { <2 x i32>, <2 x i32>, <2 x i32> } @fixed_vec_qux(<2 x i32>)
declare { <vscale x 4 x float>, <vscale x 4 x float> } @scalable_vec_masked_foo(<vscale x 4 x float>, <vscale x 4 x i1>)
declare { <vscale x 4 x i64>, <vscale x 4 x i64> } @scalable_vec_masked_bar_i64(<vscale x 4 x i64>, <vscale x 4 x i1>)
attributes #0 = { nounwind "vector-function-abi-variant"="_ZGVnN2v_foo(fixed_vec_foo)" }
attributes #1 = { nounwind "vector-function-abi-variant"="_ZGVnN2v_bar(fixed_vec_bar)" }
@ -404,3 +480,4 @@ attributes #2 = { nounwind "vector-function-abi-variant"="_ZGVnN2v_baz(fixed_vec
attributes #3 = { nounwind "vector-function-abi-variant"="_ZGVsMxv_foo(scalable_vec_masked_foo)" }
attributes #4 = { nounwind "vector-function-abi-variant"="_ZGVnN2v_bar_named(fixed_vec_bar)" }
attributes #5 = { nounwind "vector-function-abi-variant"="_ZGVnN2v_qux(fixed_vec_qux)" }
attributes #6 = { nounwind "vector-function-abi-variant"="_ZGVsMxv_bar_i64(scalable_vec_masked_bar_i64)" }

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llvm/test/Transforms/LoopVectorize/vplan-widen-struct-return.ll Normal file
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; REQUIRES: asserts
; RUN: opt < %s -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -debug-only=loop-vectorize -disable-output -S 2>&1 | FileCheck %s
define void @struct_return_f32_widen(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: LV: Checking a loop in 'struct_return_f32_widen'
; CHECK: VPlan 'Initial VPlan for VF={2},UF>=1' {
; CHECK-NEXT: Live-in vp<[[VFxUF:%.+]]> = VF * UF
; CHECK-NEXT: Live-in vp<[[VTC:%.+]]> = vector-trip-count
; CHECK-NEXT: Live-in ir<1024> = original trip-count
; CHECK-EMPTY:
; CHECK-NEXT: ir-bb<entry>:
; CHECK-NEXT: Successor(s): vector.ph
; CHECK-EMPTY:
; CHECK-NEXT: vector.ph:
; CHECK-NEXT: Successor(s): vector loop
; CHECK-EMPTY:
; CHECK-NEXT: <x1> vector loop: {
; CHECK-NEXT: vector.body:
; CHECK-NEXT: EMIT vp<[[CAN_IV:%.+]]> = CANONICAL-INDUCTION ir<0>, vp<%index.next>
; CHECK-NEXT: vp<[[STEPS:%.+]]> = SCALAR-STEPS vp<[[CAN_IV]]>, ir<1>
; CHECK-NEXT: CLONE ir<%arrayidx> = getelementptr inbounds ir<%in>, vp<[[STEPS]]>
; CHECK-NEXT: vp<[[IN_VEC_PTR:%.+]]> = vector-pointer ir<%arrayidx>
; CHECK-NEXT: WIDEN ir<%in_val> = load vp<[[IN_VEC_PTR]]>
; CHECK-NEXT: WIDEN-CALL ir<%call> = call @foo(ir<%in_val>) (using library function: fixed_vec_foo)
; CHECK-NEXT: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-NEXT: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
; CHECK-NEXT: CLONE ir<%arrayidx2> = getelementptr inbounds ir<%out_a>, vp<[[STEPS]]>
; CHECK-NEXT: vp<[[OUT_A_VEC_PTR:%.+]]> = vector-pointer ir<%arrayidx2>
; CHECK-NEXT: WIDEN store vp<[[OUT_A_VEC_PTR]]>, ir<%extract_a>
; CHECK-NEXT: CLONE ir<%arrayidx4> = getelementptr inbounds ir<%out_b>, vp<[[STEPS]]>
; CHECK-NEXT: vp<[[OUT_B_VEC_PTR:%.+]]> = vector-pointer ir<%arrayidx4>
; CHECK-NEXT: WIDEN store vp<[[OUT_B_VEC_PTR]]>, ir<%extract_b>
; CHECK-NEXT: EMIT vp<%index.next> = add nuw vp<[[CAN_IV]]>, vp<[[VFxUF]]>
; CHECK-NEXT: EMIT branch-on-count vp<%index.next>, vp<[[VTC]]>
; CHECK-NEXT: No successors
; CHECK-NEXT: }
entry:
br label %for.body
for.body:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %in, i64 %iv
%in_val = load float, ptr %arrayidx, align 4
%call = tail call { float, float } @foo(float %in_val) #0
%extract_a = extractvalue { float, float } %call, 0
%extract_b = extractvalue { float, float } %call, 1
%arrayidx2 = getelementptr inbounds float, ptr %out_a, i64 %iv
store float %extract_a, ptr %arrayidx2, align 4
%arrayidx4 = getelementptr inbounds float, ptr %out_b, i64 %iv
store float %extract_b, ptr %arrayidx4, align 4
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, 1024
br i1 %exitcond.not, label %exit, label %for.body
exit:
ret void
}
define void @struct_return_f32_replicate(ptr noalias %in, ptr noalias writeonly %out_a, ptr noalias writeonly %out_b) {
; CHECK-LABEL: LV: Checking a loop in 'struct_return_f32_replicate'
; CHECK: VPlan 'Initial VPlan for VF={2},UF>=1' {
; CHECK-NEXT: Live-in vp<[[VFxUF:%.+]]> = VF * UF
; CHECK-NEXT: Live-in vp<[[VTC:%.+]]> = vector-trip-count
; CHECK-NEXT: Live-in ir<1024> = original trip-count
; CHECK-EMPTY:
; CHECK-NEXT: ir-bb<entry>:
; CHECK-NEXT: Successor(s): vector.ph
; CHECK-EMPTY:
; CHECK-NEXT: vector.ph:
; CHECK-NEXT: Successor(s): vector loop
; CHECK-EMPTY:
; CHECK-NEXT: <x1> vector loop: {
; CHECK-NEXT: vector.body:
; CHECK-NEXT: EMIT vp<[[CAN_IV:%.+]]> = CANONICAL-INDUCTION ir<0>, vp<%index.next>
; CHECK-NEXT: vp<[[STEPS:%.+]]> = SCALAR-STEPS vp<[[CAN_IV]]>, ir<1>
; CHECK-NEXT: CLONE ir<%arrayidx> = getelementptr inbounds ir<%in>, vp<[[STEPS]]>
; CHECK-NEXT: vp<[[IN_VEC_PTR:%.+]]> = vector-pointer ir<%arrayidx>
; CHECK-NEXT: WIDEN ir<%in_val> = load vp<[[IN_VEC_PTR]]>
; CHECK-NEXT: REPLICATE ir<%call> = call @foo(ir<%in_val>)
; CHECK-NEXT: WIDEN ir<%extract_a> = extractvalue ir<%call>, ir<0>
; CHECK-NEXT: WIDEN ir<%extract_b> = extractvalue ir<%call>, ir<1>
; CHECK-NEXT: CLONE ir<%arrayidx2> = getelementptr inbounds ir<%out_a>, vp<[[STEPS]]>
; CHECK-NEXT: vp<[[OUT_A_VEC_PTR:%.+]]> = vector-pointer ir<%arrayidx2>
; CHECK-NEXT: WIDEN store vp<[[OUT_A_VEC_PTR]]>, ir<%extract_a>
; CHECK-NEXT: CLONE ir<%arrayidx4> = getelementptr inbounds ir<%out_b>, vp<[[STEPS]]>
; CHECK-NEXT: vp<[[OUT_B_VEC_PTR:%.+]]> = vector-pointer ir<%arrayidx4>
; CHECK-NEXT: WIDEN store vp<[[OUT_B_VEC_PTR]]>, ir<%extract_b>
; CHECK-NEXT: EMIT vp<%index.next> = add nuw vp<[[CAN_IV]]>, vp<[[VFxUF]]>
; CHECK-NEXT: EMIT branch-on-count vp<%index.next>, vp<[[VTC]]>
; CHECK-NEXT: No successors
; CHECK-NEXT: }
entry:
br label %for.body
for.body:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %in, i64 %iv
%in_val = load float, ptr %arrayidx, align 4
; #3 does not have a fixed-size vector mapping (so replication is used)
%call = tail call { float, float } @foo(float %in_val) #1
%extract_a = extractvalue { float, float } %call, 0
%extract_b = extractvalue { float, float } %call, 1
%arrayidx2 = getelementptr inbounds float, ptr %out_a, i64 %iv
store float %extract_a, ptr %arrayidx2, align 4
%arrayidx4 = getelementptr inbounds float, ptr %out_b, i64 %iv
store float %extract_b, ptr %arrayidx4, align 4
%iv.next = add nuw nsw i64 %iv, 1
%exitcond.not = icmp eq i64 %iv.next, 1024
br i1 %exitcond.not, label %exit, label %for.body
exit:
ret void
}
declare { float, float } @foo(float)
declare { <2 x float>, <2 x float> } @fixed_vec_foo(<2 x float>)
declare { <vscale x 4 x float>, <vscale x 4 x float> } @scalable_vec_masked_foo(<vscale x 4 x float>, <vscale x 4 x i1>)
attributes #0 = { nounwind "vector-function-abi-variant"="_ZGVnN2v_foo(fixed_vec_foo)" }
attributes #1 = { nounwind "vector-function-abi-variant"="_ZGVsMxv_foo(scalable_vec_masked_foo)" }