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Add EliminateDeadOutputStores to API.

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Also eliminates dead output variables and unused output variable
components. Finally calls aggressive dead code elimination.

AnalyzeDeadOutputStores also supplied to be called on the following
shader to provide input for the Eliminate* function.
This commit is contained in:
Greg Fischer
2022-04-18 16:00:51 -06:00
parent 0cd93a0efe
commit 7f047b986b
2 changed files with 70 additions and 2 deletions
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53
SPIRV/SpvTools.cpp
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@@ -212,8 +212,7 @@ void SpirvToolsTransform(const glslang::TIntermediate& intermediate, std::vector
optimizer.RegisterPass(spvtools::CreateInterpolateFixupPass());
if (options->optimizeSize) {
optimizer.RegisterPass(spvtools::CreateRedundancyEliminationPass());
if (intermediate.getStage() == EShLanguage::EShLangVertex)
optimizer.RegisterPass(spvtools::CreateEliminateDeadInputComponentsPass());
optimizer.RegisterPass(spvtools::CreateEliminateDeadInputComponentsSafePass());
}
optimizer.RegisterPass(spvtools::CreateAggressiveDCEPass());
optimizer.RegisterPass(spvtools::CreateCFGCleanupPass());
@@ -224,6 +223,56 @@ void SpirvToolsTransform(const glslang::TIntermediate& intermediate, std::vector
optimizer.Run(spirv.data(), spirv.size(), &spirv, spvOptOptions);
}
bool SpirvToolsAnalyzeDeadOutputStores(spv_target_env target_env, std::vector<unsigned int>& spirv,
std::unordered_set<uint32_t>* live_locs,
std::unordered_set<uint32_t>* live_builtins,
spv::SpvBuildLogger* logger)
{
spvtools::Optimizer optimizer(target_env);
optimizer.SetMessageConsumer(OptimizerMesssageConsumer);
optimizer.RegisterPass(spvtools::CreateAnalyzeLiveInputPass(live_locs, live_builtins));
spvtools::OptimizerOptions spvOptOptions;
optimizer.SetTargetEnv(target_env);
spvOptOptions.set_run_validator(false);
return optimizer.Run(spirv.data(), spirv.size(), &spirv, spvOptOptions);
}
void SpirvToolsEliminateDeadOutputStores(spv_target_env target_env, std::vector<unsigned int>& spirv,
std::unordered_set<uint32_t>* live_locs,
std::unordered_set<uint32_t>* live_builtins,
spv::SpvBuildLogger* logger)
{
spvtools::Optimizer optimizer(target_env);
optimizer.SetMessageConsumer(OptimizerMesssageConsumer);
optimizer.RegisterPass(spvtools::CreateEliminateDeadOutputStoresPass(live_locs, live_builtins));
optimizer.RegisterPass(spvtools::CreateAggressiveDCEPass(false, true));
optimizer.RegisterPass(spvtools::CreateEliminateDeadOutputComponentsPass());
optimizer.RegisterPass(spvtools::CreateAggressiveDCEPass(false, true));
spvtools::OptimizerOptions spvOptOptions;
optimizer.SetTargetEnv(target_env);
spvOptOptions.set_run_validator(false);
optimizer.Run(spirv.data(), spirv.size(), &spirv, spvOptOptions);
}
void SpirvToolsEliminateDeadInputComponents(spv_target_env target_env, std::vector<unsigned int>& spirv,
spv::SpvBuildLogger* logger)
{
spvtools::Optimizer optimizer(target_env);
optimizer.SetMessageConsumer(OptimizerMesssageConsumer);
optimizer.RegisterPass(spvtools::CreateEliminateDeadInputComponentsPass());
optimizer.RegisterPass(spvtools::CreateAggressiveDCEPass());
spvtools::OptimizerOptions spvOptOptions;
optimizer.SetTargetEnv(target_env);
spvOptOptions.set_run_validator(false);
optimizer.Run(spirv.data(), spirv.size(), &spirv, spvOptOptions);
}
// Apply the SPIRV-Tools optimizer to strip debug info from SPIR-V. This is implicitly done by
// SpirvToolsTransform if spvOptions->stripDebugInfo is set, but can be called separately if
// optimization is disabled.