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https://github.com/KhronosGroup/SPIRV-Tools
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c2013e248b
Currently it is impossible to invalidate the constnat and type manager. However, the compact ids pass changes the ids for the types and constants, which makes them invalid. This change will make them analyses that have to been explicitly marked as preserved by passes. This will allow compact ids to invalidate them. Fixes #2220.
66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
// 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_REDUCE_LOAD_SIZE_H_
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#define SOURCE_OPT_REDUCE_LOAD_SIZE_H_
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#include <unordered_map>
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#include "source/opt/ir_context.h"
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#include "source/opt/module.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 ReduceLoadSize : public Pass {
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public:
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const char* name() const override { return "reduce-load-size"; }
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Status Process() override;
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// Return the mask of preserved Analyses.
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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::kAnalysisCombinators | IRContext::kAnalysisCFG |
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IRContext::kAnalysisDominatorAnalysis |
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IRContext::kAnalysisLoopAnalysis | IRContext::kAnalysisNameMap |
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IRContext::kAnalysisConstants | IRContext::kAnalysisTypes;
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}
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private:
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// Replaces |inst|, which must be an OpCompositeExtract instruction, with
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// an OpAccessChain and a load if possible. This happens only if it is a load
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// feeding |inst|. Returns true if the substitution happened. The position
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// of the new instructions will be in the same place as the load feeding the
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// extract.
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bool ReplaceExtract(Instruction* inst);
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// Returns true if the OpCompositeExtract instruction |inst| should be replace
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// or not. This is determined by looking at the load that feeds |inst| if
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// it is a load. |should_replace_cache_| is used to cache the results based
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// on the load feeding |inst|.
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bool ShouldReplaceExtract(Instruction* inst);
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// Maps the result id of an OpLoad instruction to the result of whether or
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// not the OpCompositeExtract that use the id should be replaced.
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std::unordered_map<uint32_t, bool> should_replace_cache_;
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};
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} // namespace opt
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} // namespace spvtools
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#endif // SOURCE_OPT_REDUCE_LOAD_SIZE_H_
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