-/// getAllocationOrder - Returns the register allocation order for a specified
-/// register class in the form of a pair of TargetRegisterClass iterators.
-std::pair<TargetRegisterClass::iterator,TargetRegisterClass::iterator>
-ARMBaseRegisterInfo::getAllocationOrder(const TargetRegisterClass *RC,
- unsigned HintType, unsigned HintReg,
- const MachineFunction &MF) const {
- const TargetFrameInfo *TFI = MF.getTarget().getFrameInfo();
+unsigned
+ARMBaseRegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC,
+ MachineFunction &MF) const {
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
+ switch (RC->getID()) {
+ default:
+ return 0;
+ case ARM::tGPRRegClassID:
+ return TFI->hasFP(MF) ? 4 : 5;
+ case ARM::GPRRegClassID: {
+ unsigned FP = TFI->hasFP(MF) ? 1 : 0;
+ return 10 - FP - (STI.isR9Reserved() ? 1 : 0);
+ }
+ case ARM::SPRRegClassID: // Currently not used as 'rep' register class.
+ case ARM::DPRRegClassID:
+ return 32 - 10;
+ }
+}
+
+/// getRawAllocationOrder - Returns the register allocation order for a
+/// specified register class with a target-dependent hint.
+ArrayRef<unsigned>
+ARMBaseRegisterInfo::getRawAllocationOrder(const TargetRegisterClass *RC,
+ unsigned HintType, unsigned HintReg,
+ const MachineFunction &MF) const {
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();