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Enable InsertFreeze flag of JumpThreading when used in LTO 

This patch enables inserting freeze when JumpThreading converts a select to
a conditional branch when it is run in LTO.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D85534
This commit is contained in:
Juneyoung Lee 2020-09-10 19:05:24 +09:00
parent f51e55e09e
commit 1b9884df8d
2 changed files with 4 additions and 4 deletions
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4
llvm/lib/Passes/PassBuilder.cpp
View File

@ -1508,7 +1508,7 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level, bool DebugLogging,
FPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(FPM, Level);
FPM.addPass(JumpThreadingPass());
FPM.addPass(JumpThreadingPass(/*InsertFreezeWhenUnfoldingSelect*/ true));
// Do a post inline PGO instrumentation and use pass. This is a context
// sensitive PGO pass.
@ -1575,7 +1575,7 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level, bool DebugLogging,
MainFPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(MainFPM, Level);
MainFPM.addPass(JumpThreadingPass());
MainFPM.addPass(JumpThreadingPass(/*InsertFreezeWhenUnfoldingSelect*/ true));
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(MainFPM)));
// Create a function that performs CFI checks for cross-DSO calls with

4
llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
View File

@ -998,7 +998,7 @@ void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) {
// The IPO passes may leave cruft around. Clean up after them.
PM.add(createInstructionCombiningPass());
addExtensionsToPM(EP_Peephole, PM);
PM.add(createJumpThreadingPass());
PM.add(createJumpThreadingPass(/*FreezeSelectCond*/ true));
// Break up allocas
PM.add(createSROAPass());
@ -1061,7 +1061,7 @@ void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) {
PM.add(createInstructionCombiningPass());
addExtensionsToPM(EP_Peephole, PM);
PM.add(createJumpThreadingPass());
PM.add(createJumpThreadingPass(/*FreezeSelectCond*/ true));
}
void PassManagerBuilder::addLateLTOOptimizationPasses(