MipsSEFrameLowering::MipsSEFrameLowering(const MipsSubtarget &STI)
: MipsFrameLowering(STI, STI.stackAlignment()) {}
-unsigned MipsSEFrameLowering::ehDataReg(unsigned I) const {
- static const unsigned EhDataReg[] = {
- Mips::A0, Mips::A1, Mips::A2, Mips::A3
- };
- static const unsigned EhDataReg64[] = {
- Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64
- };
-
- return STI.isABI_N64() ? EhDataReg64[I] : EhDataReg[I];
-}
-
-void MipsSEFrameLowering::emitPrologue(MachineFunction &MF) const {
- MachineBasicBlock &MBB = MF.front();
+void MipsSEFrameLowering::emitPrologue(MachineFunction &MF,
+ MachineBasicBlock &MBB) const {
+ assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported");
MachineFrameInfo *MFI = MF.getFrameInfo();
MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
*static_cast<const MipsRegisterInfo *>(STI.getRegisterInfo());
MachineBasicBlock::iterator MBBI = MBB.begin();
- DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
- unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
- unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
- unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
- unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
+ DebugLoc dl;
+ MipsABIInfo ABI = STI.getABI();
+ unsigned SP = ABI.GetStackPtr();
+ unsigned FP = ABI.GetFramePtr();
+ unsigned ZERO = ABI.GetNullPtr();
+ unsigned MOVE = ABI.GetGPRMoveOp();
+ unsigned ADDiu = ABI.GetPtrAddiuOp();
+ unsigned AND = ABI.IsN64() ? Mips::AND64 : Mips::AND;
+
+ const TargetRegisterClass *RC = ABI.ArePtrs64bit() ?
+ &Mips::GPR64RegClass : &Mips::GPR32RegClass;
// First, compute final stack size.
uint64_t StackSize = MFI->getStackSize();
}
if (MipsFI->callsEhReturn()) {
- const TargetRegisterClass *RC = STI.isABI_N64() ?
- &Mips::GPR64RegClass : &Mips::GPR32RegClass;
-
// Insert instructions that spill eh data registers.
for (int I = 0; I < 4; ++I) {
- if (!MBB.isLiveIn(ehDataReg(I)))
- MBB.addLiveIn(ehDataReg(I));
- TII.storeRegToStackSlot(MBB, MBBI, ehDataReg(I), false,
+ if (!MBB.isLiveIn(ABI.GetEhDataReg(I)))
+ MBB.addLiveIn(ABI.GetEhDataReg(I));
+ TII.storeRegToStackSlot(MBB, MBBI, ABI.GetEhDataReg(I), false,
MipsFI->getEhDataRegFI(I), RC, &RegInfo);
}
// Emit .cfi_offset directives for eh data registers.
for (int I = 0; I < 4; ++I) {
int64_t Offset = MFI->getObjectOffset(MipsFI->getEhDataRegFI(I));
- unsigned Reg = MRI->getDwarfRegNum(ehDataReg(I), true);
+ unsigned Reg = MRI->getDwarfRegNum(ABI.GetEhDataReg(I), true);
unsigned CFIIndex = MMI.addFrameInst(
MCCFIInstruction::createOffset(nullptr, Reg, Offset));
BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
// if framepointer enabled, set it to point to the stack pointer.
if (hasFP(MF)) {
// Insert instruction "move $fp, $sp" at this location.
- BuildMI(MBB, MBBI, dl, TII.get(ADDu), FP).addReg(SP).addReg(ZERO)
+ BuildMI(MBB, MBBI, dl, TII.get(MOVE), FP).addReg(SP).addReg(ZERO)
.setMIFlag(MachineInstr::FrameSetup);
// emit ".cfi_def_cfa_register $fp"
nullptr, MRI->getDwarfRegNum(FP, true)));
BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex);
+
+ if (RegInfo.needsStackRealignment(MF)) {
+ // addiu $Reg, $zero, -MaxAlignment
+ // andi $sp, $sp, $Reg
+ unsigned VR = MF.getRegInfo().createVirtualRegister(RC);
+ assert(isInt<16>(MFI->getMaxAlignment()) &&
+ "Function's alignment size requirement is not supported.");
+ int MaxAlign = - (signed) MFI->getMaxAlignment();
+
+ BuildMI(MBB, MBBI, dl, TII.get(ADDiu), VR).addReg(ZERO) .addImm(MaxAlign);
+ BuildMI(MBB, MBBI, dl, TII.get(AND), SP).addReg(SP).addReg(VR);
+
+ if (hasBP(MF)) {
+ // move $s7, $sp
+ unsigned BP = STI.isABI_N64() ? Mips::S7_64 : Mips::S7;
+ BuildMI(MBB, MBBI, dl, TII.get(MOVE), BP)
+ .addReg(SP)
+ .addReg(ZERO);
+ }
+ }
}
}
*static_cast<const MipsRegisterInfo *>(STI.getRegisterInfo());
DebugLoc dl = MBBI->getDebugLoc();
- unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
- unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
- unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
- unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
+ MipsABIInfo ABI = STI.getABI();
+ unsigned SP = ABI.GetStackPtr();
+ unsigned FP = ABI.GetFramePtr();
+ unsigned ZERO = ABI.GetNullPtr();
+ unsigned MOVE = ABI.GetGPRMoveOp();
// if framepointer enabled, restore the stack pointer.
if (hasFP(MF)) {
--I;
// Insert instruction "move $sp, $fp" at this location.
- BuildMI(MBB, I, dl, TII.get(ADDu), SP).addReg(FP).addReg(ZERO);
+ BuildMI(MBB, I, dl, TII.get(MOVE), SP).addReg(FP).addReg(ZERO);
}
if (MipsFI->callsEhReturn()) {
- const TargetRegisterClass *RC = STI.isABI_N64() ?
- &Mips::GPR64RegClass : &Mips::GPR32RegClass;
+ const TargetRegisterClass *RC =
+ ABI.ArePtrs64bit() ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
// Find first instruction that restores a callee-saved register.
MachineBasicBlock::iterator I = MBBI;
// Insert instructions that restore eh data registers.
for (int J = 0; J < 4; ++J) {
- TII.loadRegFromStackSlot(MBB, I, ehDataReg(J), MipsFI->getEhDataRegFI(J),
- RC, &RegInfo);
+ TII.loadRegFromStackSlot(MBB, I, ABI.GetEhDataReg(J),
+ MipsFI->getEhDataRegFI(J), RC, &RegInfo);
}
}
!MFI->hasVarSizedObjects();
}
-void MipsSEFrameLowering::
-processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
- RegScavenger *RS) const {
- MachineRegisterInfo &MRI = MF.getRegInfo();
+/// Mark \p Reg and all registers aliasing it in the bitset.
+static void setAliasRegs(MachineFunction &MF, BitVector &SavedRegs,
+ unsigned Reg) {
+ const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
+ for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI)
+ SavedRegs.set(*AI);
+}
+
+void MipsSEFrameLowering::determineCalleeSaves(MachineFunction &MF,
+ BitVector &SavedRegs,
+ RegScavenger *RS) const {
+ TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
- unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
+ MipsABIInfo ABI = STI.getABI();
+ unsigned FP = ABI.GetFramePtr();
+ unsigned BP = ABI.IsN64() ? Mips::S7_64 : Mips::S7;
// Mark $fp as used if function has dedicated frame pointer.
if (hasFP(MF))
- MRI.setPhysRegUsed(FP);
+ setAliasRegs(MF, SavedRegs, FP);
+ // Mark $s7 as used if function has dedicated base pointer.
+ if (hasBP(MF))
+ setAliasRegs(MF, SavedRegs, BP);
// Create spill slots for eh data registers if function calls eh_return.
if (MipsFI->callsEhReturn())
if (isInt<16>(MaxSPOffset))
return;
- const TargetRegisterClass *RC = STI.isABI_N64() ?
- &Mips::GPR64RegClass : &Mips::GPR32RegClass;
+ const TargetRegisterClass *RC =
+ ABI.ArePtrs64bit() ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
int FI = MF.getFrameInfo()->CreateStackObject(RC->getSize(),
RC->getAlignment(), false);
RS->addScavengingFrameIndex(FI);
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