-
Notifications
You must be signed in to change notification settings - Fork 569
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add passes to eliminate dead output stores
This adds two passes to accomplish this: one pass to analyze a shader to determine the input slots that are live. The second pass is run on the preceding shader to eliminate any stores to output slots that are not consumed by the following shader. These passes support vert, tesc, tese, geom, and frag shaders. These passes are currently only available through the API. These passes together with dead code elimination, and elimination of dead input and output components and variables (WIP), will allow users to do dead code elimination across shader boundaries.
- Loading branch information
1 parent
eb113f0
commit c490015
Showing
18 changed files
with
2,633 additions
and
2 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| // Copyright (c) 2022 The Khronos Group Inc. | ||
| // Copyright (c) 2022 LunarG Inc. | ||
| // | ||
| // 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. | ||
|
|
||
| #include "source/opt/analyze_live_input_pass.h" | ||
|
|
||
| #include "source/opt/ir_context.h" | ||
|
|
||
| namespace spvtools { | ||
| namespace opt { | ||
|
|
||
| Pass::Status AnalyzeLiveInputPass::Process() { | ||
| // Current functionality assumes shader capability | ||
| if (!context()->get_feature_mgr()->HasCapability(SpvCapabilityShader)) | ||
| return Status::SuccessWithoutChange; | ||
| Pass::Status status = DoLiveInputAnalysis(); | ||
| return status; | ||
| } | ||
|
|
||
| Pass::Status AnalyzeLiveInputPass::DoLiveInputAnalysis() { | ||
| // Current functionality only supports frag, tesc, tese or geom shaders. | ||
| // Report failure for any other stage. | ||
| auto stage = context()->GetStage(); | ||
| if (stage != SpvExecutionModelFragment && | ||
| stage != SpvExecutionModelTessellationControl && | ||
| stage != SpvExecutionModelTessellationEvaluation && | ||
| stage != SpvExecutionModelGeometry) | ||
| return Status::Failure; | ||
| context()->get_liveness_mgr()->GetLiveness(live_locs_, live_builtins_); | ||
| return Status::SuccessWithoutChange; | ||
| } | ||
|
|
||
| } // namespace opt | ||
| } // namespace spvtools |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| // Copyright (c) 2022 The Khronos Group Inc. | ||
| // Copyright (c) 2022 LunarG Inc. | ||
| // | ||
| // 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_ANALYZE_LIVE_INPUT_H_ | ||
| #define SOURCE_OPT_ANALYZE_LIVE_INPUT_H_ | ||
|
|
||
| #include <unordered_set> | ||
|
|
||
| #include "source/opt/pass.h" | ||
|
|
||
| namespace spvtools { | ||
| namespace opt { | ||
|
|
||
| // See optimizer.hpp for documentation. | ||
| class AnalyzeLiveInputPass : public Pass { | ||
| public: | ||
| explicit AnalyzeLiveInputPass(std::unordered_set<uint32_t>* live_locs, | ||
| std::unordered_set<uint32_t>* live_builtins) | ||
| : live_locs_(live_locs), live_builtins_(live_builtins) {} | ||
|
|
||
| const char* name() const override { return "analyze-live-input"; } | ||
| Status Process() override; | ||
|
|
||
| // Return the mask of preserved Analyses. | ||
| IRContext::Analysis GetPreservedAnalyses() override { | ||
| return IRContext::kAnalysisDefUse | | ||
| IRContext::kAnalysisInstrToBlockMapping | | ||
| IRContext::kAnalysisCombinators | IRContext::kAnalysisCFG | | ||
| IRContext::kAnalysisDominatorAnalysis | | ||
| IRContext::kAnalysisLoopAnalysis | IRContext::kAnalysisNameMap | | ||
| IRContext::kAnalysisConstants | IRContext::kAnalysisTypes; | ||
| } | ||
|
|
||
| private: | ||
| // Do live input analysis | ||
| Status DoLiveInputAnalysis(); | ||
|
|
||
| std::unordered_set<uint32_t>* live_locs_; | ||
| std::unordered_set<uint32_t>* live_builtins_; | ||
| }; | ||
|
|
||
| } // namespace opt | ||
| } // namespace spvtools | ||
|
|
||
| #endif // SOURCE_OPT_ANALYZE_LIVE_INPUT_H_ |
Oops, something went wrong.