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Add TargetMachine::addEarlyAsPossiblePasses, and call it from opt.

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Summary:
This is a hook to allow TargetMachine to install passes at the
EP_EarlyAsPossible PassManagerBuilder extension point.

Reviewers: chandlerc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D18614

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267763 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Justin Lebar 2016-04-27 19:08:24 +00:00
parent a1d8280553
commit ae889d3672
2 changed files with 25 additions and 11 deletions
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5
include/llvm/Target/TargetMachine.h
View File

@ -217,6 +217,11 @@ public:
/// uses this to answer queries about the IR.
virtual TargetIRAnalysis getTargetIRAnalysis();
/// Add target-specific function passes that should be run as early as
/// possible in the optimization pipeline. Most TargetMachines have no such
/// passes.
virtual void addEarlyAsPossiblePasses(PassManagerBase &) {}
/// These enums are meant to be passed into addPassesToEmitFile to indicate
/// what type of file to emit, and returned by it to indicate what type of
/// file could actually be made.

31
tools/opt/opt.cpp
View File

@ -230,7 +230,8 @@ static inline void addPass(legacy::PassManagerBase &PM, Pass *P) {
/// OptLevel - Optimization Level
static void AddOptimizationPasses(legacy::PassManagerBase &MPM,
legacy::FunctionPassManager &FPM,
unsigned OptLevel, unsigned SizeLevel) {
TargetMachine *TM, unsigned OptLevel,
unsigned SizeLevel) {
if (!NoVerify || VerifyEach)
FPM.add(createVerifierPass()); // Verify that input is correct
@ -260,6 +261,14 @@ static void AddOptimizationPasses(legacy::PassManagerBase &MPM,
Builder.SLPVectorize =
DisableSLPVectorization ? false : OptLevel > 1 && SizeLevel < 2;
// Add target-specific passes that need to run as early as possible.
if (TM)
Builder.addExtension(
PassManagerBuilder::EP_EarlyAsPossible,
[&](const PassManagerBuilder &, legacy::PassManagerBase &PM) {
TM->addEarlyAsPossiblePasses(PM);
});
Builder.populateFunctionPassManager(FPM);
Builder.populateModulePassManager(MPM);
}
@ -519,27 +528,27 @@ int main(int argc, char **argv) {
}
if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
AddOptimizationPasses(Passes, *FPasses, 1, 0);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 1, 0);
OptLevelO1 = false;
}
if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
AddOptimizationPasses(Passes, *FPasses, 2, 0);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 0);
OptLevelO2 = false;
}
if (OptLevelOs && OptLevelOs.getPosition() < PassList.getPosition(i)) {
AddOptimizationPasses(Passes, *FPasses, 2, 1);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 1);
OptLevelOs = false;
}
if (OptLevelOz && OptLevelOz.getPosition() < PassList.getPosition(i)) {
AddOptimizationPasses(Passes, *FPasses, 2, 2);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 2);
OptLevelOz = false;
}
if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
AddOptimizationPasses(Passes, *FPasses, 3, 0);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 3, 0);
OptLevelO3 = false;
}
@ -591,19 +600,19 @@ int main(int argc, char **argv) {
}
if (OptLevelO1)
AddOptimizationPasses(Passes, *FPasses, 1, 0);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 1, 0);
if (OptLevelO2)
AddOptimizationPasses(Passes, *FPasses, 2, 0);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 0);
if (OptLevelOs)
AddOptimizationPasses(Passes, *FPasses, 2, 1);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 1);
if (OptLevelOz)
AddOptimizationPasses(Passes, *FPasses, 2, 2);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 2);
if (OptLevelO3)
AddOptimizationPasses(Passes, *FPasses, 3, 0);
AddOptimizationPasses(Passes, *FPasses, TM.get(), 3, 0);
if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
FPasses->doInitialization();