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https://github.com/KhronosGroup/SPIRV-Tools
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048dcd38ce
WebGPU requires certain variables to be initialized, whereas there are known issues with using initializers in Vulkan. This PR is the first of three implementing a pass to decompose initialized variables into a variable declaration followed by a store. This has been broken up into multiple PRs, because there 3 distinct cases that need to be handled, which require separate implementations. This first PR implements the basic infrastructure that is needed, and handling of Function storage class variables. Private and Output will be handled in future PRs. This is part of resolving #2388
54 lines
2.1 KiB
C++
54 lines
2.1 KiB
C++
// Copyright (c) 2019 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_LEGALIZE_VECTOR_SHUFFLE_PASS_H_
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#define SOURCE_OPT_LEGALIZE_VECTOR_SHUFFLE_PASS_H_
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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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// Converts any usages of 0xFFFFFFFF for the literals in OpVectorShuffle to a
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// literal 0. This is needed because using OxFFFFFFFF is forbidden by the WebGPU
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// spec. 0xFFFFFFFF in the main spec indicates that the result for this
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// component has no source, thus is undefined. Since this is undefined
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// behaviour we are free to use 0.
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class LegalizeVectorShufflePass : public Pass {
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public:
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const char* name() const override { return "legalize-vector-shuffle"; }
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Status Process() override;
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IRContext::Analysis GetPreservedAnalyses() override {
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return IRContext::kAnalysisInstrToBlockMapping |
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IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
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IRContext::kAnalysisCFG | IRContext::kAnalysisDominatorAnalysis |
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IRContext::kAnalysisLoopAnalysis | IRContext::kAnalysisNameMap |
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IRContext::kAnalysisScalarEvolution |
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IRContext::kAnalysisRegisterPressure |
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IRContext::kAnalysisValueNumberTable |
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IRContext::kAnalysisStructuredCFG |
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IRContext::kAnalysisBuiltinVarId |
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IRContext::kAnalysisIdToFuncMapping | IRContext::kAnalysisTypes |
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IRContext::kAnalysisDefUse | IRContext::kAnalysisConstants;
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}
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};
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} // namespace opt
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} // namespace spvtools
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#endif // SOURCE_OPT_LEGALIZE_VECTOR_SHUFFLE_PASS_H_
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