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Merge pull request #701 from ifilippov/alias_new

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Adding Alias Analysis passes
This commit is contained in:
Dmitry Babokin
2013-12-27 07:33:37 -08:00
parent 904a575f93 4ef38e1615
commit 07c281738a
1 changed files with 22 additions and 2 deletions
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24
opt.cpp
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@@ -514,11 +514,31 @@ Optimize(llvm::Module *module, int optLevel) {
llvm::initializeInstrumentation(*registry);
llvm::initializeTarget(*registry);
optPM.add(llvm::createGlobalDCEPass(), 200);
optPM.add(llvm::createGlobalDCEPass(), 185);
// Setup to use LLVM default AliasAnalysis
// Ideally, we want call:
// llvm::PassManagerBuilder pm_Builder;
// pm_Builder.OptLevel = optLevel;
// pm_Builder.addInitialAliasAnalysisPasses(optPM);
// but the addInitialAliasAnalysisPasses() is a private function
// so we explicitly enable them here.
// Need to keep sync with future LLVM change
// An alternative is to call populateFunctionPassManager()
optPM.add(llvm::createTypeBasedAliasAnalysisPass(), 190);
optPM.add(llvm::createBasicAliasAnalysisPass());
optPM.add(llvm::createCFGSimplificationPass());
// Here clang has an experimental pass SROAPass instead of
// ScalarReplAggregatesPass. We should add it in the future.
optPM.add(llvm::createScalarReplAggregatesPass());
optPM.add(llvm::createEarlyCSEPass());
optPM.add(llvm::createLowerExpectIntrinsicPass());
optPM.add(llvm::createTypeBasedAliasAnalysisPass());
optPM.add(llvm::createBasicAliasAnalysisPass());
// Early optimizations to try to reduce the total amount of code to
// work with if we can
optPM.add(llvm::createReassociatePass());
optPM.add(llvm::createReassociatePass(), 200);
optPM.add(llvm::createConstantPropagationPass());
optPM.add(llvm::createDeadInstEliminationPass());
optPM.add(llvm::createCFGSimplificationPass());