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59 lines
2.1 KiB
59 lines
2.1 KiB
// Copyright (c) 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SOURCE_OPT_SIMPLIFICATION_PASS_H_
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#define SOURCE_OPT_SIMPLIFICATION_PASS_H_
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#include "source/opt/function.h"
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#include "source/opt/ir_context.h"
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#include "source/opt/pass.h"
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namespace spvtools {
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namespace opt {
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// See optimizer.hpp for documentation.
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class SimplificationPass : public Pass {
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public:
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const char* name() const override { return "simplify-instructions"; }
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Status Process() override;
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IRContext::Analysis GetPreservedAnalyses() override {
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return IRContext::kAnalysisDefUse |
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IRContext::kAnalysisInstrToBlockMapping |
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IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
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IRContext::kAnalysisCFG | IRContext::kAnalysisDominatorAnalysis |
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IRContext::kAnalysisNameMap | IRContext::kAnalysisConstants |
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IRContext::kAnalysisTypes;
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}
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private:
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// Returns true if the module was changed. The simplifier is called on every
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// instruction in |function| until nothing else in the function can be
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// simplified.
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bool SimplifyFunction(Function* function);
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// FactorAddMul can create |folded_inst| Mul of new Add. If Mul, push any Add
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// operand not in |seen_inst| into |worklist|. This is heavily restricted to
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// improve compile time but can be expanded for future simplifications which
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// simiarly create new operations.
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void AddNewOperands(Instruction* folded_inst,
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std::unordered_set<Instruction*>* inst_seen,
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std::vector<Instruction*>* work_list);
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};
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} // namespace opt
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} // namespace spvtools
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#endif // SOURCE_OPT_SIMPLIFICATION_PASS_H_
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