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https://github.com/KhronosGroup/SPIRV-Tools
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48007a5c7f
This pass converts an internal form of GLSLstd450 Interpolate ops to the externally valid form. The external form takes the lvalue of the interpolant. The internal form can do a load of the interpolant. The pass replaces the load with its pointer. The internal form is generated by glslang and possibly other frontends for HLSL shaders. The new pass is called as part of HLSL legalization after all propagation is complete. Also adds internal interpolate form to pre-legalization validation
55 lines
2.1 KiB
C++
55 lines
2.1 KiB
C++
// Copyright (c) 2021 The Khronos Group Inc.
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// Copyright (c) 2021 Valve Corporation
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// Copyright (c) 2021 LunarG Inc.
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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_INTERP_FIXUP_H
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#define SOURCE_OPT_INTERP_FIXUP_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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// Replaces overloaded internal form for GLSLstd450Interpolate* instructions
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// with external form. Specifically, removes OpLoad from the first argument
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// and replaces it with the pointer for the OpLoad. glslang generates the
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// internal form. This pass is called as part of glslang HLSL legalization.
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class InterpFixupPass : public Pass {
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public:
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const char* name() const override { return "interp-fixup"; }
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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_INTERP_FIXUP_H
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