Move callee-saved regs spills / reloads to TFI
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120228 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/MSP430/MSP430FrameInfo.cpp b/lib/Target/MSP430/MSP430FrameInfo.cpp
index 0a39a36..7e7a0e4 100644
--- a/lib/Target/MSP430/MSP430FrameInfo.cpp
+++ b/lib/Target/MSP430/MSP430FrameInfo.cpp
@@ -174,3 +174,50 @@
}
}
}
+
+// FIXME: Can we eleminate these in favour of generic code?
+bool
+MSP430FrameInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ const std::vector<CalleeSavedInfo> &CSI,
+ const TargetRegisterInfo *TRI) const {
+ if (CSI.empty())
+ return false;
+
+ DebugLoc DL;
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
+ MachineFunction &MF = *MBB.getParent();
+ const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
+ MSP430MachineFunctionInfo *MFI = MF.getInfo<MSP430MachineFunctionInfo>();
+ MFI->setCalleeSavedFrameSize(CSI.size() * 2);
+
+ for (unsigned i = CSI.size(); i != 0; --i) {
+ unsigned Reg = CSI[i-1].getReg();
+ // Add the callee-saved register as live-in. It's killed at the spill.
+ MBB.addLiveIn(Reg);
+ BuildMI(MBB, MI, DL, TII.get(MSP430::PUSH16r))
+ .addReg(Reg, RegState::Kill);
+ }
+ return true;
+}
+
+bool
+MSP430FrameInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ const std::vector<CalleeSavedInfo> &CSI,
+ const TargetRegisterInfo *TRI) const {
+ if (CSI.empty())
+ return false;
+
+ DebugLoc DL;
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
+ MachineFunction &MF = *MBB.getParent();
+ const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
+
+ for (unsigned i = 0, e = CSI.size(); i != e; ++i)
+ BuildMI(MBB, MI, DL, TII.get(MSP430::POP16r), CSI[i].getReg());
+
+ return true;
+}