1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
#include "mkql_discard.h"
#include <yql/essentials/minikql/computation/mkql_computation_node_codegen.h> // Y_IGNORE
#include <yql/essentials/minikql/computation/mkql_computation_node_holders.h>
#include <yql/essentials/minikql/mkql_node_cast.h>
#include <yql/essentials/minikql/mkql_runtime_version.h>
namespace NKikimr {
namespace NMiniKQL {
namespace {
class TDiscardFlowWrapper : public TStatelessFlowCodegeneratorRootNode<TDiscardFlowWrapper> {
typedef TStatelessFlowCodegeneratorRootNode<TDiscardFlowWrapper> TBaseComputation;
public:
TDiscardFlowWrapper(IComputationNode* flow)
: TBaseComputation(flow, EValueRepresentation::Embedded), Flow(flow)
{}
NUdf::TUnboxedValuePod DoCalculate(TComputationContext& ctx) const {
while (true) {
if (auto item = Flow->GetValue(ctx); item.IsSpecial())
return item.Release();
}
}
#ifndef MKQL_DISABLE_CODEGEN
Value* DoGenerateGetValue(const TCodegenContext& ctx, BasicBlock*& block) const {
auto& context = ctx.Codegen.GetContext();
const auto loop = BasicBlock::Create(context, "loop", ctx.Func);
const auto skip = BasicBlock::Create(context, "skip", ctx.Func);
const auto exit = BasicBlock::Create(context, "exit", ctx.Func);
BranchInst::Create(loop, block);
block = loop;
const auto item = GetNodeValue(Flow, ctx, block);
BranchInst::Create(exit, skip, IsSpecial(item, block), block);
block = skip;
ValueCleanup(Flow->GetRepresentation(), item, ctx, block);
BranchInst::Create(loop, block);
block = exit;
return item;
}
#endif
private:
void RegisterDependencies() const final {
FlowDependsOn(Flow);
}
IComputationNode* const Flow;
};
class TDiscardWideFlowWrapper : public TStatelessFlowCodegeneratorRootNode<TDiscardWideFlowWrapper> {
using TBaseComputation = TStatelessFlowCodegeneratorRootNode<TDiscardWideFlowWrapper>;
public:
TDiscardWideFlowWrapper(IComputationWideFlowNode* flow, ui32 size)
: TBaseComputation(flow, EValueRepresentation::Embedded), Flow(flow), Stub(size, nullptr)
{}
NUdf::TUnboxedValuePod DoCalculate(TComputationContext& ctx) const {
while (true) {
switch (Flow->FetchValues(ctx, Stub.data())) {
case EFetchResult::Finish:
return NUdf::TUnboxedValuePod::MakeFinish();
case EFetchResult::Yield:
return NUdf::TUnboxedValuePod::MakeYield();
default:
continue;
}
}
}
#ifndef MKQL_DISABLE_CODEGEN
Value* DoGenerateGetValue(const TCodegenContext& ctx, BasicBlock*& block) const {
auto& context = ctx.Codegen.GetContext();
const auto loop = BasicBlock::Create(context, "loop", ctx.Func);
const auto exit = BasicBlock::Create(context, "exit", ctx.Func);
BranchInst::Create(loop, block);
block = loop;
const auto result = GetNodeValues(Flow, ctx, block).first;
const auto good = CmpInst::Create(Instruction::ICmp, ICmpInst::ICMP_SGT, result, ConstantInt::get(result->getType(), 0), "good", block);
BranchInst::Create(loop, exit, good, block);
block = exit;
const auto yield = CmpInst::Create(Instruction::ICmp, ICmpInst::ICMP_EQ, result, ConstantInt::get(result->getType(), 0), "yield", block);
const auto outres = SelectInst::Create(yield, GetYield(context), GetFinish(context), "outres", block);
return outres;
}
#endif
private:
void RegisterDependencies() const final {
FlowDependsOn(Flow);
}
IComputationWideFlowNode* const Flow;
mutable std::vector<NUdf::TUnboxedValue*> Stub;
};
class TDiscardWrapper : public TCustomValueCodegeneratorNode<TDiscardWrapper> {
typedef TCustomValueCodegeneratorNode<TDiscardWrapper> TBaseComputation;
public:
class TValue : public TComputationValue<TValue> {
public:
TValue(TMemoryUsageInfo* memInfo, NUdf::TUnboxedValue&& stream)
: TComputationValue(memInfo)
, Stream(std::move(stream))
{
}
NUdf::EFetchStatus Fetch(NUdf::TUnboxedValue&) override {
for (NUdf::TUnboxedValue item;;) {
const auto status = Stream.Fetch(item);
if (status != NUdf::EFetchStatus::Ok) {
return status;
}
}
}
private:
const NUdf::TUnboxedValue Stream;
};
TDiscardWrapper(TComputationMutables& mutables, IComputationNode* stream)
: TBaseComputation(mutables)
, Stream(stream)
{
}
NUdf::TUnboxedValuePod DoCalculate(TComputationContext& ctx) const {
#ifndef MKQL_DISABLE_CODEGEN
if (ctx.ExecuteLLVM && Fetch)
return ctx.HolderFactory.Create<TStreamCodegenValueStateless>(Fetch, &ctx, Stream->GetValue(ctx));
#endif
return ctx.HolderFactory.Create<TValue>(Stream->GetValue(ctx));
}
private:
void RegisterDependencies() const final {
DependsOn(Stream);
}
#ifndef MKQL_DISABLE_CODEGEN
void GenerateFunctions(NYql::NCodegen::ICodegen& codegen) final {
FetchFunc = GenerateFetch(codegen);
codegen.ExportSymbol(FetchFunc);
}
void FinalizeFunctions(NYql::NCodegen::ICodegen& codegen) final {
if (FetchFunc)
Fetch = reinterpret_cast<TFetchPtr>(codegen.GetPointerToFunction(FetchFunc));
}
Function* GenerateFetch(NYql::NCodegen::ICodegen& codegen) const {
auto& module = codegen.GetModule();
auto& context = codegen.GetContext();
const auto& name = TBaseComputation::MakeName("Fetch");
if (const auto f = module.getFunction(name.c_str()))
return f;
const auto valueType = Type::getInt128Ty(context);
const auto containerType = codegen.GetEffectiveTarget() == NYql::NCodegen::ETarget::Windows ? static_cast<Type*>(PointerType::getUnqual(valueType)) : static_cast<Type*>(valueType);
const auto contextType = GetCompContextType(context);
const auto statusType = Type::getInt32Ty(context);
const auto funcType = FunctionType::get(statusType, {PointerType::getUnqual(contextType), containerType, PointerType::getUnqual(valueType)}, false);
TCodegenContext ctx(codegen);
ctx.Func = cast<Function>(module.getOrInsertFunction(name.c_str(), funcType).getCallee());
DISubprogramAnnotator annotator(ctx, ctx.Func);
auto args = ctx.Func->arg_begin();
ctx.Ctx = &*args;
const auto containerArg = &*++args;
const auto main = BasicBlock::Create(context, "main", ctx.Func);
auto block = main;
const auto container = codegen.GetEffectiveTarget() == NYql::NCodegen::ETarget::Windows ?
new LoadInst(valueType, containerArg, "load_container", false, block) : static_cast<Value*>(containerArg);
const auto loop = BasicBlock::Create(context, "loop", ctx.Func);
const auto stub = new AllocaInst(valueType, 0U, "stub", block);
new StoreInst(ConstantInt::get(valueType, 0), stub, block);
BranchInst::Create(loop, block);
block = loop;
const auto status = CallBoxedValueVirtualMethod<NUdf::TBoxedValueAccessor::EMethod::Fetch>(statusType, container, codegen, block, stub);
const auto icmp = CmpInst::Create(Instruction::ICmp, ICmpInst::ICMP_NE, status, ConstantInt::get(statusType, static_cast<ui32>(NUdf::EFetchStatus::Ok)), "cond", block);
const auto done = BasicBlock::Create(context, "done", ctx.Func);
BranchInst::Create(done, loop, icmp, block);
block = done;
ReturnInst::Create(context, status, block);
return ctx.Func;
}
using TFetchPtr = TStreamCodegenValueStateless::TFetchPtr;
Function* FetchFunc = nullptr;
TFetchPtr Fetch = nullptr;
#endif
IComputationNode* const Stream;
};
}
IComputationNode* WrapDiscard(TCallable& callable, const TComputationNodeFactoryContext& ctx) {
MKQL_ENSURE(callable.GetInputsCount() == 1, "Expected 1 arg");
const auto type = callable.GetType()->GetReturnType();
const auto flow = LocateNode(ctx.NodeLocator, callable, 0);
if (type->IsFlow()) {
if (const auto wide = dynamic_cast<IComputationWideFlowNode*>(flow)) {
auto flowType = AS_TYPE(TFlowType, callable.GetInput(0U).GetStaticType());
if (RuntimeVersion > 35 && flowType->GetItemType()->IsMulti() || flowType->GetItemType()->IsTuple()) {
return new TDiscardWideFlowWrapper(wide, GetWideComponentsCount(flowType));
}
return new TDiscardWideFlowWrapper(wide, 0U);
} else {
return new TDiscardFlowWrapper(flow);
}
} else if (type->IsStream()) {
return new TDiscardWrapper(ctx.Mutables, flow);
}
THROW yexception() << "Expected flow or stream.";
}
}
}
|
