SPIRV-Tools/source/opt/generate_webgpu_initializers_pass.h

63 lines
2.6 KiB
C
Raw Normal View History

// Copyright (c) 2019 Google LLC.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SOURCE_OPT_GENERATE_WEBGPU_INITIALIZERS_PASS_H_
#define SOURCE_OPT_GENERATE_WEBGPU_INITIALIZERS_PASS_H_
#include "source/opt/ir_context.h"
#include "source/opt/module.h"
#include "source/opt/pass.h"
namespace spvtools {
namespace opt {
// Adds initializers to variables with storage classes Output, Private, and
// Function if they are missing. In the WebGPU environment these storage classes
// require that the variables are initialized. Currently they are initialized to
// NULL, though in the future some of them may be initialized to the first value
// that is stored in them, if that was a constant.
class GenerateWebGPUInitializersPass : public Pass {
public:
const char* name() const override { return "generate-webgpu-initializers"; }
Status Process() override;
IRContext::Analysis GetPreservedAnalyses() override {
return IRContext::kAnalysisInstrToBlockMapping |
IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
IRContext::kAnalysisCFG | IRContext::kAnalysisDominatorAnalysis |
IRContext::kAnalysisLoopAnalysis | IRContext::kAnalysisNameMap |
IRContext::kAnalysisScalarEvolution |
IRContext::kAnalysisRegisterPressure |
IRContext::kAnalysisValueNumberTable |
IRContext::kAnalysisStructuredCFG |
IRContext::kAnalysisBuiltinVarId |
IRContext::kAnalysisIdToFuncMapping | IRContext::kAnalysisTypes |
IRContext::kAnalysisDefUse | IRContext::kAnalysisConstants;
}
private:
using NullConstantTypeMap = std::unordered_map<uint32_t, Instruction*>;
NullConstantTypeMap null_constant_type_map_;
std::unordered_set<Instruction*> seen_null_constants_;
Instruction* GetNullConstantForVariable(Instruction* variable_inst);
void AddNullInitializerToVariable(Instruction* constant_inst,
Instruction* variable_inst);
};
} // namespace opt
} // namespace spvtools
#endif // SOURCE_OPT_GENERATE_WEBGPU_INITIALIZERS_PASS_H_