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Added TargetPassConfig. The first little step toward configuring codegen passes.

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Allows command line overrides to be centralized in LLVMTargetMachine.cpp.
LLVMTargetMachine can intercept common passes and give precedence to command line overrides.
Allows adding "internal" target configuration options without touching TargetOptions.
Encapsulates the PassManager.
Provides a good point to initialize all CodeGen passes so that Pass ID's can be used in APIs.
Allows modifying the target configuration hooks without rebuilding the world.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149672 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2012-02-03 05:12:41 +00:00
parent 8247e0dca6
commit 843ee2e6a4
25 changed files with 565 additions and 268 deletions
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27
lib/Target/MSP430/MSP430TargetMachine.cpp
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@ -38,14 +38,35 @@ MSP430TargetMachine::MSP430TargetMachine(const Target &T,
InstrInfo(*this), TLInfo(*this), TSInfo(*this),
FrameLowering(Subtarget) { }
namespace {
/// MSP430 Code Generator Pass Configuration Options.
class MSP430PassConfig : public TargetPassConfig {
public:
MSP430PassConfig(MSP430TargetMachine *TM, PassManagerBase &PM,
bool DisableVerifyFlag)
: TargetPassConfig(TM, PM, DisableVerifyFlag) {}
bool MSP430TargetMachine::addInstSelector(PassManagerBase &PM) {
MSP430TargetMachine &getMSP430TargetMachine() const {
return getTM<MSP430TargetMachine>();
}
virtual bool addInstSelector();
virtual bool addPreEmitPass();
};
} // namespace
TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM,
bool DisableVerify) {
return new MSP430PassConfig(this, PM, DisableVerify);
}
bool MSP430PassConfig::addInstSelector() {
// Install an instruction selector.
PM.add(createMSP430ISelDag(*this, getOptLevel()));
PM.add(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
return false;
}
bool MSP430TargetMachine::addPreEmitPass(PassManagerBase &PM) {
bool MSP430PassConfig::addPreEmitPass() {
// Must run branch selection immediately preceding the asm printer.
PM.add(createMSP430BranchSelectionPass());
return false;