/// stored. Also used as an anchor for instructions that need to be altered
/// when using frame pointers (dyna_add, dyna_sub.)
int FramePointerSaveIndex;
+
+ /// UsesLR - Indicates whether LR is used in the current function.
+ ///
+ bool UsesLR;
public:
PPCFunctionInfo(MachineFunction& MF)
int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
+
+ void setUsesLR(bool U) { UsesLR = U; }
+ bool usesLR() { return UsesLR; }
};
/// usesLR - Returns if the link registers (LR) has been used in the function.
///
bool PPCRegisterInfo::usesLR(MachineFunction &MF) const {
- const bool *PhysRegsUsed = MF.getUsedPhysregs();
- return PhysRegsUsed[getRARegister()];
+ PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
+ return FI->usesLR();
}
void PPCRegisterInfo::
MFI->setStackSize(FrameSize);
}
+void PPCRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF)
+ const {
+ // Save and clear the LR state.
+ PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
+ unsigned LR = getRARegister();
+ FI->setUsesLR(MF.isPhysRegUsed(LR));
+ MF.changePhyRegUsed(LR, false);
+}
+
void PPCRegisterInfo::emitPrologue(MachineFunction &MF) const {
MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB
MachineBasicBlock::iterator MBBI = MBB.begin();
/// frame size.
void determineFrameLayout(MachineFunction &MF) const;
+ void processFunctionBeforeCalleeSavedScan(MachineFunction &MF) const;
void emitPrologue(MachineFunction &MF) const;
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;