#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
-#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetInstrInfo.h"
BitVector XCoreRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
BitVector Reserved(getNumRegs());
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
Reserved.set(XCore::CP);
Reserved.set(XCore::DP);
Reserved.set(XCore::SP);
Reserved.set(XCore::LR);
- if (hasFP(MF)) {
+ if (TFI->hasFP(MF)) {
Reserved.set(XCore::R10);
}
return Reserved;
bool
XCoreRegisterInfo::requiresRegisterScavenging(const MachineFunction &MF) const {
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
// TODO can we estimate stack size?
- return hasFP(MF);
+ return TFI->hasFP(MF);
}
-bool XCoreRegisterInfo::hasFP(const MachineFunction &MF) const {
- return DisableFramePointerElim(MF) || MF.getFrameInfo()->hasVarSizedObjects();
+bool
+XCoreRegisterInfo::useFPForScavengingIndex(const MachineFunction &MF) const {
+ return false;
}
// This function eliminates ADJCALLSTACKDOWN,
void XCoreRegisterInfo::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
- if (!hasReservedCallFrame(MF)) {
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
+ if (!TFI->hasReservedCallFrame(MF)) {
// Turn the adjcallstackdown instruction into 'extsp <amt>' and the
// adjcallstackup instruction into 'ldaw sp, sp[<amt>]'
MachineInstr *Old = I;
// We need to keep the stack aligned properly. To do this, we round the
// amount of space needed for the outgoing arguments up to the next
// alignment boundary.
- unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
+ unsigned Align = TFI->getStackAlignment();
Amount = (Amount+Align-1)/Align*Align;
assert(Amount%4 == 0);
Amount /= 4;
-
+
bool isU6 = isImmU6(Amount);
-
if (!isU6 && !isImmU16(Amount)) {
// FIX could emit multiple instructions in this case.
#ifndef NDEBUG
int FrameIndex = FrameOp.getIndex();
MachineFunction &MF = *MI.getParent()->getParent();
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex);
int StackSize = MF.getFrameInfo()->getStackSize();
Offset/=4;
- bool FP = hasFP(MF);
+ bool FP = TFI->hasFP(MF);
unsigned Reg = MI.getOperand(0).getReg();
bool isKill = MI.getOpcode() == XCore::STWFI && MI.getOperand(0).isKill();
MBB.erase(II);
}
-void
-XCoreRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
- RegScavenger *RS) const {
- MachineFrameInfo *MFI = MF.getFrameInfo();
- bool LRUsed = MF.getRegInfo().isPhysRegUsed(XCore::LR);
- const TargetRegisterClass *RC = XCore::GRRegsRegisterClass;
- XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
- if (LRUsed) {
- MF.getRegInfo().setPhysRegUnused(XCore::LR);
-
- bool isVarArg = MF.getFunction()->isVarArg();
- int FrameIdx;
- if (! isVarArg) {
- // A fixed offset of 0 allows us to save / restore LR using entsp / retsp.
- FrameIdx = MFI->CreateFixedObject(RC->getSize(), 0, true);
- } else {
- FrameIdx = MFI->CreateStackObject(RC->getSize(), RC->getAlignment(),
- false);
- }
- XFI->setUsesLR(FrameIdx);
- XFI->setLRSpillSlot(FrameIdx);
- }
- if (requiresRegisterScavenging(MF)) {
- // Reserve a slot close to SP or frame pointer.
- RS->setScavengingFrameIndex(MFI->CreateStackObject(RC->getSize(),
- RC->getAlignment(),
- false));
- }
- if (hasFP(MF)) {
- // A callee save register is used to hold the FP.
- // This needs saving / restoring in the epilogue / prologue.
- XFI->setFPSpillSlot(MFI->CreateStackObject(RC->getSize(),
- RC->getAlignment(),
- false));
- }
-}
-
-void XCoreRegisterInfo::
-processFunctionBeforeFrameFinalized(MachineFunction &MF) const {
-
-}
-
void XCoreRegisterInfo::
loadConstant(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned DstReg, int64_t Value, DebugLoc dl) const {
BuildMI(MBB, I, dl, TII.get(Opcode), DstReg).addImm(Value);
}
-void XCoreRegisterInfo::
-storeToStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
- unsigned SrcReg, int Offset, DebugLoc dl) const {
- assert(Offset%4 == 0 && "Misaligned stack offset");
- Offset/=4;
- bool isU6 = isImmU6(Offset);
- if (!isU6 && !isImmU16(Offset))
- report_fatal_error("storeToStack offset too big " + Twine(Offset));
- int Opcode = isU6 ? XCore::STWSP_ru6 : XCore::STWSP_lru6;
- BuildMI(MBB, I, dl, TII.get(Opcode))
- .addReg(SrcReg)
- .addImm(Offset);
-}
-
-void XCoreRegisterInfo::
-loadFromStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
- unsigned DstReg, int Offset, DebugLoc dl) const {
- assert(Offset%4 == 0 && "Misaligned stack offset");
- Offset/=4;
- bool isU6 = isImmU6(Offset);
- if (!isU6 && !isImmU16(Offset))
- report_fatal_error("loadFromStack offset too big " + Twine(Offset));
- int Opcode = isU6 ? XCore::LDWSP_ru6 : XCore::LDWSP_lru6;
- BuildMI(MBB, I, dl, TII.get(Opcode), DstReg)
- .addImm(Offset);
-}
-
-void XCoreRegisterInfo::emitPrologue(MachineFunction &MF) const {
- MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB
- MachineBasicBlock::iterator MBBI = MBB.begin();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- MachineModuleInfo *MMI = &MF.getMMI();
- XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
- DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
-
- bool FP = hasFP(MF);
-
- // Work out frame sizes.
- int FrameSize = MFI->getStackSize();
-
- assert(FrameSize%4 == 0 && "Misaligned frame size");
-
- FrameSize/=4;
-
- bool isU6 = isImmU6(FrameSize);
-
- if (!isU6 && !isImmU16(FrameSize)) {
- // FIXME could emit multiple instructions.
- report_fatal_error("emitPrologue Frame size too big: " + Twine(FrameSize));
- }
- bool emitFrameMoves = needsFrameMoves(MF);
-
- // Do we need to allocate space on the stack?
- if (FrameSize) {
- bool saveLR = XFI->getUsesLR();
- bool LRSavedOnEntry = false;
- int Opcode;
- if (saveLR && (MFI->getObjectOffset(XFI->getLRSpillSlot()) == 0)) {
- Opcode = (isU6) ? XCore::ENTSP_u6 : XCore::ENTSP_lu6;
- MBB.addLiveIn(XCore::LR);
- saveLR = false;
- LRSavedOnEntry = true;
- } else {
- Opcode = (isU6) ? XCore::EXTSP_u6 : XCore::EXTSP_lu6;
- }
- BuildMI(MBB, MBBI, dl, TII.get(Opcode)).addImm(FrameSize);
-
- if (emitFrameMoves) {
- std::vector<MachineMove> &Moves = MMI->getFrameMoves();
-
- // Show update of SP.
- MCSymbol *FrameLabel = MMI->getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(XCore::PROLOG_LABEL)).addSym(FrameLabel);
-
- MachineLocation SPDst(MachineLocation::VirtualFP);
- MachineLocation SPSrc(MachineLocation::VirtualFP, -FrameSize * 4);
- Moves.push_back(MachineMove(FrameLabel, SPDst, SPSrc));
-
- if (LRSavedOnEntry) {
- MachineLocation CSDst(MachineLocation::VirtualFP, 0);
- MachineLocation CSSrc(XCore::LR);
- Moves.push_back(MachineMove(FrameLabel, CSDst, CSSrc));
- }
- }
- if (saveLR) {
- int LRSpillOffset = MFI->getObjectOffset(XFI->getLRSpillSlot());
- storeToStack(MBB, MBBI, XCore::LR, LRSpillOffset + FrameSize*4, dl);
- MBB.addLiveIn(XCore::LR);
-
- if (emitFrameMoves) {
- MCSymbol *SaveLRLabel = MMI->getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(XCore::PROLOG_LABEL)).addSym(SaveLRLabel);
- MachineLocation CSDst(MachineLocation::VirtualFP, LRSpillOffset);
- MachineLocation CSSrc(XCore::LR);
- MMI->getFrameMoves().push_back(MachineMove(SaveLRLabel, CSDst, CSSrc));
- }
- }
- }
-
- if (FP) {
- // Save R10 to the stack.
- int FPSpillOffset = MFI->getObjectOffset(XFI->getFPSpillSlot());
- storeToStack(MBB, MBBI, XCore::R10, FPSpillOffset + FrameSize*4, dl);
- // R10 is live-in. It is killed at the spill.
- MBB.addLiveIn(XCore::R10);
- if (emitFrameMoves) {
- MCSymbol *SaveR10Label = MMI->getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(XCore::PROLOG_LABEL)).addSym(SaveR10Label);
- MachineLocation CSDst(MachineLocation::VirtualFP, FPSpillOffset);
- MachineLocation CSSrc(XCore::R10);
- MMI->getFrameMoves().push_back(MachineMove(SaveR10Label, CSDst, CSSrc));
- }
- // Set the FP from the SP.
- unsigned FramePtr = XCore::R10;
- BuildMI(MBB, MBBI, dl, TII.get(XCore::LDAWSP_ru6), FramePtr)
- .addImm(0);
- if (emitFrameMoves) {
- // Show FP is now valid.
- MCSymbol *FrameLabel = MMI->getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(XCore::PROLOG_LABEL)).addSym(FrameLabel);
- MachineLocation SPDst(FramePtr);
- MachineLocation SPSrc(MachineLocation::VirtualFP);
- MMI->getFrameMoves().push_back(MachineMove(FrameLabel, SPDst, SPSrc));
- }
- }
-
- if (emitFrameMoves) {
- // Frame moves for callee saved.
- std::vector<MachineMove> &Moves = MMI->getFrameMoves();
- std::vector<std::pair<MCSymbol*, CalleeSavedInfo> >&SpillLabels =
- XFI->getSpillLabels();
- for (unsigned I = 0, E = SpillLabels.size(); I != E; ++I) {
- MCSymbol *SpillLabel = SpillLabels[I].first;
- CalleeSavedInfo &CSI = SpillLabels[I].second;
- int Offset = MFI->getObjectOffset(CSI.getFrameIdx());
- unsigned Reg = CSI.getReg();
- MachineLocation CSDst(MachineLocation::VirtualFP, Offset);
- MachineLocation CSSrc(Reg);
- Moves.push_back(MachineMove(SpillLabel, CSDst, CSSrc));
- }
- }
-}
-
-void XCoreRegisterInfo::emitEpilogue(MachineFunction &MF,
- MachineBasicBlock &MBB) const {
- MachineFrameInfo *MFI = MF.getFrameInfo();
- MachineBasicBlock::iterator MBBI = prior(MBB.end());
- DebugLoc dl = MBBI->getDebugLoc();
-
- bool FP = hasFP(MF);
-
- if (FP) {
- // Restore the stack pointer.
- unsigned FramePtr = XCore::R10;
- BuildMI(MBB, MBBI, dl, TII.get(XCore::SETSP_1r))
- .addReg(FramePtr);
- }
-
- // Work out frame sizes.
- int FrameSize = MFI->getStackSize();
-
- assert(FrameSize%4 == 0 && "Misaligned frame size");
-
- FrameSize/=4;
-
- bool isU6 = isImmU6(FrameSize);
-
- if (!isU6 && !isImmU16(FrameSize)) {
- // FIXME could emit multiple instructions.
- report_fatal_error("emitEpilogue Frame size too big: " + Twine(FrameSize));
- }
-
- if (FrameSize) {
- XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
-
- if (FP) {
- // Restore R10
- int FPSpillOffset = MFI->getObjectOffset(XFI->getFPSpillSlot());
- FPSpillOffset += FrameSize*4;
- loadFromStack(MBB, MBBI, XCore::R10, FPSpillOffset, dl);
- }
- bool restoreLR = XFI->getUsesLR();
- if (restoreLR && MFI->getObjectOffset(XFI->getLRSpillSlot()) != 0) {
- int LRSpillOffset = MFI->getObjectOffset(XFI->getLRSpillSlot());
- LRSpillOffset += FrameSize*4;
- loadFromStack(MBB, MBBI, XCore::LR, LRSpillOffset, dl);
- restoreLR = false;
- }
- if (restoreLR) {
- // Fold prologue into return instruction
- assert(MBBI->getOpcode() == XCore::RETSP_u6
- || MBBI->getOpcode() == XCore::RETSP_lu6);
- int Opcode = (isU6) ? XCore::RETSP_u6 : XCore::RETSP_lu6;
- BuildMI(MBB, MBBI, dl, TII.get(Opcode)).addImm(FrameSize);
- MBB.erase(MBBI);
- } else {
- int Opcode = (isU6) ? XCore::LDAWSP_ru6_RRegs : XCore::LDAWSP_lru6_RRegs;
- BuildMI(MBB, MBBI, dl, TII.get(Opcode), XCore::SP).addImm(FrameSize);
- }
- }
-}
-
int XCoreRegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const {
return XCoreGenRegisterInfo::getDwarfRegNumFull(RegNum, 0);
}
unsigned XCoreRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
- bool FP = hasFP(MF);
-
- return FP ? XCore::R10 : XCore::SP;
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
+ return TFI->hasFP(MF) ? XCore::R10 : XCore::SP;
}
unsigned XCoreRegisterInfo::getRARegister() const {
return XCore::LR;
}
-void XCoreRegisterInfo::getInitialFrameState(std::vector<MachineMove> &Moves)
- const {
- // Initial state of the frame pointer is SP.
- MachineLocation Dst(MachineLocation::VirtualFP);
- MachineLocation Src(XCore::SP, 0);
- Moves.push_back(MachineMove(0, Dst, Src));
-}
-
#include "XCoreGenRegisterInfo.inc"