#include "MSP430.h"
#include "MSP430InstrInfo.h"
+#include "MSP430MachineFunctionInfo.h"
#include "MSP430TargetMachine.h"
#include "MSP430GenInstrInfo.inc"
#include "llvm/Function.h"
-#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
-
+#include "llvm/CodeGen/PseudoSourceValue.h"
+#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
MSP430InstrInfo::MSP430InstrInfo(MSP430TargetMachine &tm)
: TargetInstrInfoImpl(MSP430Insts, array_lengthof(MSP430Insts)),
- RI(*this), TM(tm) {}
+ RI(tm, *this), TM(tm) {}
+
+void MSP430InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned SrcReg, bool isKill, int FrameIdx,
+ const TargetRegisterClass *RC) const {
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
+ if (RC == &MSP430::GR16RegClass)
+ BuildMI(MBB, MI, DL, get(MSP430::MOV16mr))
+ .addFrameIndex(FrameIdx).addImm(0)
+ .addReg(SrcReg, getKillRegState(isKill));
+ else if (RC == &MSP430::GR8RegClass)
+ BuildMI(MBB, MI, DL, get(MSP430::MOV8mr))
+ .addFrameIndex(FrameIdx).addImm(0)
+ .addReg(SrcReg, getKillRegState(isKill));
+ else
+ llvm_unreachable("Cannot store this register to stack slot!");
+}
+
+void MSP430InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned DestReg, int FrameIdx,
+ const TargetRegisterClass *RC) const{
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
+ if (RC == &MSP430::GR16RegClass)
+ BuildMI(MBB, MI, DL, get(MSP430::MOV16rm))
+ .addReg(DestReg).addFrameIndex(FrameIdx).addImm(0);
+ else if (RC == &MSP430::GR8RegClass)
+ BuildMI(MBB, MI, DL, get(MSP430::MOV8rm))
+ .addReg(DestReg).addFrameIndex(FrameIdx).addImm(0);
+ else
+ llvm_unreachable("Cannot store this register to stack slot!");
+}
+
+bool MSP430InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ unsigned DestReg, unsigned SrcReg,
+ const TargetRegisterClass *DestRC,
+ const TargetRegisterClass *SrcRC) const {
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (I != MBB.end()) DL = I->getDebugLoc();
+
+ if (DestRC == SrcRC) {
+ unsigned Opc;
+ if (DestRC == &MSP430::GR16RegClass) {
+ Opc = MSP430::MOV16rr;
+ } else if (DestRC == &MSP430::GR8RegClass) {
+ Opc = MSP430::MOV8rr;
+ } else {
+ return false;
+ }
+
+ BuildMI(MBB, I, DL, get(Opc), DestReg).addReg(SrcReg);
+ return true;
+ }
+
+ return false;
+}
+
+bool
+MSP430InstrInfo::isMoveInstr(const MachineInstr& MI,
+ unsigned &SrcReg, unsigned &DstReg,
+ unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
+ SrcSubIdx = DstSubIdx = 0; // No sub-registers yet.
+
+ switch (MI.getOpcode()) {
+ default:
+ return false;
+ case MSP430::MOV8rr:
+ case MSP430::MOV16rr:
+ assert(MI.getNumOperands() >= 2 &&
+ MI.getOperand(0).isReg() &&
+ MI.getOperand(1).isReg() &&
+ "invalid register-register move instruction");
+ SrcReg = MI.getOperand(1).getReg();
+ DstReg = MI.getOperand(0).getReg();
+ return true;
+ }
+}
+
+bool
+MSP430InstrInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ const std::vector<CalleeSavedInfo> &CSI) const {
+ if (CSI.empty())
+ return false;
+
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
+ MachineFunction &MF = *MBB.getParent();
+ 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, get(MSP430::PUSH16r))
+ .addReg(Reg, RegState::Kill);
+ }
+ return true;
+}
+
+bool
+MSP430InstrInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI,
+ const std::vector<CalleeSavedInfo> &CSI) const {
+ if (CSI.empty())
+ return false;
+
+ DebugLoc DL = DebugLoc::getUnknownLoc();
+ if (MI != MBB.end()) DL = MI->getDebugLoc();
+
+ for (unsigned i = 0, e = CSI.size(); i != e; ++i)
+ BuildMI(MBB, MI, DL, get(MSP430::POP16r), CSI[i].getReg());
+
+ return true;
+}
+
+unsigned
+MSP430InstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+ MachineBasicBlock *FBB,
+ const SmallVectorImpl<MachineOperand> &Cond) const {
+ // FIXME this should probably have a DebugLoc operand
+ DebugLoc dl = DebugLoc::getUnknownLoc();
+
+ // Shouldn't be a fall through.
+ assert(TBB && "InsertBranch must not be told to insert a fallthrough");
+ assert((Cond.size() == 1 || Cond.size() == 0) &&
+ "MSP430 branch conditions have one component!");
+
+ if (Cond.empty()) {
+ // Unconditional branch?
+ assert(!FBB && "Unconditional branch with multiple successors!");
+ BuildMI(&MBB, dl, get(MSP430::JMP)).addMBB(TBB);
+ return 1;
+ }
+
+ // Conditional branch.
+ unsigned Count = 0;
+ llvm_unreachable("Implement conditional branches!");
+
+ return Count;
+}