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#include "mkql_fold.h"
#include <yql/essentials/minikql/computation/mkql_computation_node_codegen.h> // Y_IGNORE
#include <yql/essentials/minikql/mkql_node_cast.h>
namespace NKikimr {
namespace NMiniKQL {
namespace {
class TFoldWrapper : public TMutableCodegeneratorRootNode<TFoldWrapper> {
typedef TMutableCodegeneratorRootNode<TFoldWrapper> TBaseComputation;
public:
TFoldWrapper(TComputationMutables& mutables, EValueRepresentation kind, IComputationNode* list, IComputationExternalNode* item, IComputationExternalNode* state,
IComputationNode* newState, IComputationNode* initialState)
: TBaseComputation(mutables, kind)
, List(list)
, Item(item)
, State(state)
, NewState(newState)
, InitialState(initialState)
{
}
NUdf::TUnboxedValuePod DoCalculate(TComputationContext& compCtx) const {
State->SetValue(compCtx, InitialState->GetValue(compCtx));
TThresher<false>::DoForEachItem(List->GetValue(compCtx),
[this, &compCtx] (NUdf::TUnboxedValue&& item) {
Item->SetValue(compCtx, std::move(item));
State->SetValue(compCtx, NewState->GetValue(compCtx));
}
);
return State->GetValue(compCtx).Release();
}
#ifndef MKQL_DISABLE_CODEGEN
llvm::Value* DoGenerateGetValue(const TCodegenContext& ctx, BasicBlock*& block) const {
auto &context = ctx.Codegen.GetContext();
const auto codegenState = dynamic_cast<ICodegeneratorExternalNode*>(State);
const auto codegenItem = dynamic_cast<ICodegeneratorExternalNode*>(Item);
MKQL_ENSURE(codegenState, "State must be codegenerator node.");
MKQL_ENSURE(codegenItem, "Item must be codegenerator node.");
const auto valueType = Type::getInt128Ty(context);
const auto ptrType = PointerType::getUnqual(valueType);
const auto init = GetNodeValue(InitialState, ctx, block);
codegenState->CreateSetValue(ctx, block, init);
const auto list = GetNodeValue(List, ctx, block);
const auto elements = CallBoxedValueVirtualMethod<NUdf::TBoxedValueAccessor::EMethod::GetElements>(ptrType, list, ctx.Codegen, block);
const auto null = CmpInst::Create(Instruction::ICmp, ICmpInst::ICMP_EQ, elements, ConstantPointerNull::get(ptrType), "null", block);
const auto fast = BasicBlock::Create(context, "fast", ctx.Func);
const auto slow = BasicBlock::Create(context, "slow", ctx.Func);
const auto done = BasicBlock::Create(context, "done", ctx.Func);
BranchInst::Create(slow, fast, null, block);
{
block = fast;
const auto sizeType = Type::getInt64Ty(context);
const auto size = CallBoxedValueVirtualMethod<NUdf::TBoxedValueAccessor::EMethod::GetListLength>(sizeType, list, ctx.Codegen, block);
const auto loop = BasicBlock::Create(context, "loop", ctx.Func);
const auto index = PHINode::Create(sizeType, 2U, "index", loop);
index->addIncoming(ConstantInt::get(sizeType, 0), block);
BranchInst::Create(loop, block);
block = loop;
const auto more = CmpInst::Create(Instruction::ICmp, ICmpInst::ICMP_ULT, index, size, "more", block);
const auto good = BasicBlock::Create(context, "good", ctx.Func);
BranchInst::Create(good, done, more, block);
block = good;
const auto itemPtr = GetElementPtrInst::CreateInBounds(valueType, elements, {index}, "item_ptr", block);
const auto item = new LoadInst(valueType, itemPtr, "item", block);
codegenItem->CreateSetValue(ctx, block, item);
const auto newState = GetNodeValue(NewState, ctx, block);
codegenState->CreateSetValue(ctx, block, newState);
const auto next = BinaryOperator::CreateAdd(index, ConstantInt::get(sizeType, 1), "next", block);
index->addIncoming(next, block);
BranchInst::Create(loop, block);
}
{
block = slow;
const auto iterPtr = *Stateless || ctx.AlwaysInline ?
new AllocaInst(valueType, 0U, "iter_ptr", &ctx.Func->getEntryBlock().back()):
new AllocaInst(valueType, 0U, "iter_ptr", block);
CallBoxedValueVirtualMethod<NUdf::TBoxedValueAccessor::EMethod::GetListIterator>(iterPtr, list, ctx.Codegen, block);
const auto iter = new LoadInst(valueType, iterPtr, "iter", block);
const auto loop = BasicBlock::Create(context, "loop", ctx.Func);
const auto good = BasicBlock::Create(context, "good", ctx.Func);
const auto stop = BasicBlock::Create(context, "stop", ctx.Func);
BranchInst::Create(loop, block);
block = loop;
const auto itemPtr = codegenItem->CreateRefValue(ctx, block);
const auto status = CallBoxedValueVirtualMethod<NUdf::TBoxedValueAccessor::EMethod::Next>(Type::getInt1Ty(context), iter, ctx.Codegen, block, itemPtr);
BranchInst::Create(good, stop, status, block);
block = good;
const auto newState = GetNodeValue(NewState, ctx, block);
codegenState->CreateSetValue(ctx, block, newState);
BranchInst::Create(loop, block);
block = stop;
UnRefBoxed(iter, ctx, block);
BranchInst::Create(done, block);
}
block = done;
if (List->IsTemporaryValue())
CleanupBoxed(list, ctx, block);
return codegenState->CreateGetValue(ctx, block);
}
#endif
private:
void RegisterDependencies() const final {
this->DependsOn(List);
this->DependsOn(InitialState);
this->Own(Item);
this->Own(State);
this->DependsOn(NewState);
}
IComputationNode* const List;
IComputationExternalNode* const Item;
IComputationExternalNode* const State;
IComputationNode* const NewState;
IComputationNode* const InitialState;
};
}
IComputationNode* WrapFold(TCallable& callable, const TComputationNodeFactoryContext& ctx) {
MKQL_ENSURE(callable.GetInputsCount() == 5, "Expected 5 args");
MKQL_ENSURE(callable.GetInput(0).GetStaticType()->IsList(), "Expected List");
const auto list = LocateNode(ctx.NodeLocator, callable, 0);
const auto initialState = LocateNode(ctx.NodeLocator, callable, 1);
const auto newState = LocateNode(ctx.NodeLocator, callable, 4);
const auto item = LocateExternalNode(ctx.NodeLocator, callable, 2);
const auto state = LocateExternalNode(ctx.NodeLocator, callable, 3);
const auto kind = GetValueRepresentation(callable.GetType()->GetReturnType());
return new TFoldWrapper(ctx.Mutables, kind, list, item, state, newState, initialState);
}
}
}
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