// This file implements target- and collector-independent garbage collection
// infrastructure.
//
-// MachineCodeAnalysis identifies the GC safe points in the machine code. Roots
-// are identified in SelectionDAGISel.
+// GCMachineCodeAnalysis identifies the GC safe points in the machine code.
+// Roots are identified in SelectionDAGISel.
//
//===----------------------------------------------------------------------===//
};
- /// MachineCodeAnalysis - This is a target-independent pass over the machine
+ /// GCMachineCodeAnalysis - This is a target-independent pass over the machine
/// function representation to identify safe points for the garbage collector
/// in the machine code. It inserts labels at safe points and populates a
/// GCMetadata record for each function.
- class MachineCodeAnalysis : public MachineFunctionPass {
+ class GCMachineCodeAnalysis : public MachineFunctionPass {
const TargetMachine *TM;
GCFunctionInfo *FI;
MachineModuleInfo *MMI;
public:
static char ID;
- MachineCodeAnalysis();
- const char *getPassName() const;
+ GCMachineCodeAnalysis();
void getAnalysisUsage(AnalysisUsage &AU) const;
bool runOnMachineFunction(MachineFunction &MF);
// -----------------------------------------------------------------------------
-FunctionPass *llvm::createGCMachineCodeAnalysisPass() {
- return new MachineCodeAnalysis();
-}
+char GCMachineCodeAnalysis::ID = 0;
+char &llvm::GCMachineCodeAnalysisID = GCMachineCodeAnalysis::ID;
-char MachineCodeAnalysis::ID = 0;
+INITIALIZE_PASS(GCMachineCodeAnalysis, "gc-analysis",
+ "Analyze Machine Code For Garbage Collection", false, false)
-MachineCodeAnalysis::MachineCodeAnalysis()
+GCMachineCodeAnalysis::GCMachineCodeAnalysis()
: MachineFunctionPass(ID) {}
-const char *MachineCodeAnalysis::getPassName() const {
- return "Analyze Machine Code For Garbage Collection";
-}
-
-void MachineCodeAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
+void GCMachineCodeAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
MachineFunctionPass::getAnalysisUsage(AU);
AU.setPreservesAll();
AU.addRequired<MachineModuleInfo>();
AU.addRequired<GCModuleInfo>();
}
-MCSymbol *MachineCodeAnalysis::InsertLabel(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MI,
- DebugLoc DL) const {
+MCSymbol *GCMachineCodeAnalysis::InsertLabel(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ DebugLoc DL) const {
MCSymbol *Label = MBB.getParent()->getContext().CreateTempSymbol();
BuildMI(MBB, MI, DL, TII->get(TargetOpcode::GC_LABEL)).addSym(Label);
return Label;
}
-void MachineCodeAnalysis::VisitCallPoint(MachineBasicBlock::iterator CI) {
+void GCMachineCodeAnalysis::VisitCallPoint(MachineBasicBlock::iterator CI) {
// Find the return address (next instruction), too, so as to bracket the call
// instruction.
MachineBasicBlock::iterator RAI = CI;
}
}
-void MachineCodeAnalysis::FindSafePoints(MachineFunction &MF) {
+void GCMachineCodeAnalysis::FindSafePoints(MachineFunction &MF) {
for (MachineFunction::iterator BBI = MF.begin(),
BBE = MF.end(); BBI != BBE; ++BBI)
for (MachineBasicBlock::iterator MI = BBI->begin(),
VisitCallPoint(MI);
}
-void MachineCodeAnalysis::FindStackOffsets(MachineFunction &MF) {
+void GCMachineCodeAnalysis::FindStackOffsets(MachineFunction &MF) {
const TargetFrameLowering *TFI = TM->getFrameLowering();
assert(TFI && "TargetRegisterInfo not available!");
RI->StackOffset = TFI->getFrameIndexOffset(MF, RI->Num);
}
-bool MachineCodeAnalysis::runOnMachineFunction(MachineFunction &MF) {
+bool GCMachineCodeAnalysis::runOnMachineFunction(MachineFunction &MF) {
// Quick exit for functions that do not use GC.
if (!MF.getFunction()->hasGC())
return false;