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Differential D64183 Diff 219578 llvm/lib/CodeGen/GCRootLowering.cpp

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llvm/lib/CodeGen/GCRootLowering.cpp

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INITIALIZE_PASS(GCMachineCodeAnalysis, "gc-analysis", INITIALIZE_PASS(GCMachineCodeAnalysis, "gc-analysis",
"Analyze Machine Code For Garbage Collection", false, false) "Analyze Machine Code For Garbage Collection", false, false)
GCMachineCodeAnalysis::GCMachineCodeAnalysis() : MachineFunctionPass(ID) {} GCMachineCodeAnalysis::GCMachineCodeAnalysis() : MachineFunctionPass(ID) {}
void GCMachineCodeAnalysis::getAnalysisUsage(AnalysisUsage &AU) const { void GCMachineCodeAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
MachineFunctionPass::getAnalysisUsage(AU); MachineFunctionPass::getAnalysisUsage(AU);
AU.setPreservesAll(); AU.setPreservesAll();
AU.addRequired<MachineModuleInfo>(); AU.addRequired<MachineModuleInfoWrapperPass>();
AU.addRequired<GCModuleInfo>(); AU.addRequired<GCModuleInfo>();
} }
MCSymbol *GCMachineCodeAnalysis::InsertLabel(MachineBasicBlock &MBB, MCSymbol *GCMachineCodeAnalysis::InsertLabel(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI, MachineBasicBlock::iterator MI,
const DebugLoc &DL) const { const DebugLoc &DL) const {
MCSymbol *Label = MBB.getParent()->getContext().createTempSymbol(); MCSymbol *Label = MBB.getParent()->getContext().createTempSymbol();
BuildMI(MBB, MI, DL, TII->get(TargetOpcode::GC_LABEL)).addSym(Label); BuildMI(MBB, MI, DL, TII->get(TargetOpcode::GC_LABEL)).addSym(Label);
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} }
bool GCMachineCodeAnalysis::runOnMachineFunction(MachineFunction &MF) { bool GCMachineCodeAnalysis::runOnMachineFunction(MachineFunction &MF) {
// Quick exit for functions that do not use GC. // Quick exit for functions that do not use GC.
if (!MF.getFunction().hasGC()) if (!MF.getFunction().hasGC())
return false; return false;
FI = &getAnalysis<GCModuleInfo>().getFunctionInfo(MF.getFunction()); FI = &getAnalysis<GCModuleInfo>().getFunctionInfo(MF.getFunction());
MMI = &getAnalysis<MachineModuleInfo>(); MMI = &getAnalysis<MachineModuleInfoWrapperPass>().getMMI();
TII = MF.getSubtarget().getInstrInfo(); TII = MF.getSubtarget().getInstrInfo();
// Find the size of the stack frame. There may be no correct static frame // Find the size of the stack frame. There may be no correct static frame
// size, we use UINT64_MAX to represent this. // size, we use UINT64_MAX to represent this.
const MachineFrameInfo &MFI = MF.getFrameInfo(); const MachineFrameInfo &MFI = MF.getFrameInfo();
const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo(); const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo();
const bool DynamicFrameSize = MFI.hasVarSizedObjects() || const bool DynamicFrameSize = MFI.hasVarSizedObjects() ||
RegInfo->needsStackRealignment(MF); RegInfo->needsStackRealignment(MF);
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