#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineLocation.h"
#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"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
+#define GET_REGINFO_TARGET_DESC
+#include "XCoreGenRegisterInfo.inc"
+
using namespace llvm;
XCoreRegisterInfo::XCoreRegisterInfo(const TargetInstrInfo &tii)
- : XCoreGenRegisterInfo(XCore::ADJCALLSTACKDOWN, XCore::ADJCALLSTACKUP),
- TII(tii) {
+ : XCoreGenRegisterInfo(XCore::LR), TII(tii) {
}
// helper functions
return array_lengthof(XCore_ArgRegs);
}
-bool XCoreRegisterInfo::needsFrameMoves(const MachineFunction &MF)
-{
- const MachineFrameInfo *MFI = MF.getFrameInfo();
- MachineModuleInfo *MMI = MFI->getMachineModuleInfo();
- return (MMI && MMI->hasDebugInfo()) ||
- !MF.getFunction()->doesNotThrow() ||
- UnwindTablesMandatory;
+bool XCoreRegisterInfo::needsFrameMoves(const MachineFunction &MF) {
+ return MF.getMMI().hasDebugInfo() ||
+ MF.getFunction()->needsUnwindTableEntry();
}
const unsigned* XCoreRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
return CalleeSavedRegs;
}
-const TargetRegisterClass* const*
-XCoreRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
- static const TargetRegisterClass * const CalleeSavedRegClasses[] = {
- XCore::GRRegsRegisterClass, XCore::GRRegsRegisterClass,
- XCore::GRRegsRegisterClass, XCore::GRRegsRegisterClass,
- XCore::GRRegsRegisterClass, XCore::GRRegsRegisterClass,
- XCore::GRRegsRegisterClass, XCore::RRegsRegisterClass,
- 0
- };
- return CalleeSavedRegClasses;
-}
-
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 NoFramePointerElim || 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
MBB.erase(I);
}
-unsigned
+void
XCoreRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
- int SPAdj, FrameIndexValue *Value,
- RegScavenger *RS) const {
+ int SPAdj, RegScavenger *RS) const {
assert(SPAdj == 0 && "Unexpected");
MachineInstr &MI = *II;
DebugLoc dl = MI.getDebugLoc();
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();
#endif
Offset += StackSize;
-
+
+ unsigned FrameReg = getFrameRegister(MF);
+
+ // Special handling of DBG_VALUE instructions.
+ if (MI.isDebugValue()) {
+ MI.getOperand(i).ChangeToRegister(FrameReg, false /*isDef*/);
+ MI.getOperand(i+1).ChangeToImmediate(Offset);
+ return;
+ }
+
// fold constant into offset.
Offset += MI.getOperand(i + 1).getImm();
MI.getOperand(i + 1).ChangeToImmediate(0);
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();
if (FP) {
bool isUs = isImmUs(Offset);
- unsigned FramePtr = XCore::R10;
if (!isUs) {
- if (!RS) {
- std::string msg;
- raw_string_ostream Msg(msg);
- Msg << "eliminateFrameIndex Frame size too big: " << Offset;
- llvm_report_error(Msg.str());
- }
+ if (!RS)
+ report_fatal_error("eliminateFrameIndex Frame size too big: " +
+ Twine(Offset));
unsigned ScratchReg = RS->scavengeRegister(XCore::GRRegsRegisterClass, II,
SPAdj);
loadConstant(MBB, II, ScratchReg, Offset, dl);
switch (MI.getOpcode()) {
case XCore::LDWFI:
BuildMI(MBB, II, dl, TII.get(XCore::LDW_3r), Reg)
- .addReg(FramePtr)
+ .addReg(FrameReg)
.addReg(ScratchReg, RegState::Kill);
break;
case XCore::STWFI:
BuildMI(MBB, II, dl, TII.get(XCore::STW_3r))
.addReg(Reg, getKillRegState(isKill))
- .addReg(FramePtr)
+ .addReg(FrameReg)
.addReg(ScratchReg, RegState::Kill);
break;
case XCore::LDAWFI:
BuildMI(MBB, II, dl, TII.get(XCore::LDAWF_l3r), Reg)
- .addReg(FramePtr)
+ .addReg(FrameReg)
.addReg(ScratchReg, RegState::Kill);
break;
default:
switch (MI.getOpcode()) {
case XCore::LDWFI:
BuildMI(MBB, II, dl, TII.get(XCore::LDW_2rus), Reg)
- .addReg(FramePtr)
+ .addReg(FrameReg)
.addImm(Offset);
break;
case XCore::STWFI:
BuildMI(MBB, II, dl, TII.get(XCore::STW_2rus))
.addReg(Reg, getKillRegState(isKill))
- .addReg(FramePtr)
+ .addReg(FrameReg)
.addImm(Offset);
break;
case XCore::LDAWFI:
BuildMI(MBB, II, dl, TII.get(XCore::LDAWF_l2rus), Reg)
- .addReg(FramePtr)
+ .addReg(FrameReg)
.addImm(Offset);
break;
default:
}
} else {
bool isU6 = isImmU6(Offset);
- if (!isU6 && !isImmU16(Offset)) {
- std::string msg;
- raw_string_ostream Msg(msg);
- Msg << "eliminateFrameIndex Frame size too big: " << Offset;
- llvm_report_error(Msg.str());
- }
+ if (!isU6 && !isImmU16(Offset))
+ report_fatal_error("eliminateFrameIndex Frame size too big: " +
+ Twine(Offset));
switch (MI.getOpcode()) {
int NewOpcode;
}
// Erase old instruction.
MBB.erase(II);
- return 0;
-}
-
-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, false);
- } 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::
// TODO use mkmsk if possible.
if (!isImmU16(Value)) {
// TODO use constant pool.
- std::string msg;
- raw_string_ostream Msg(msg);
- Msg << "loadConstant value too big " << Value;
- llvm_report_error(Msg.str());
+ report_fatal_error("loadConstant value too big " + Twine(Value));
}
int Opcode = isImmU6(Value) ? XCore::LDC_ru6 : XCore::LDC_lru6;
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)) {
- std::string msg;
- raw_string_ostream Msg(msg);
- Msg << "storeToStack offset too big " << Offset;
- llvm_report_error(Msg.str());
- }
- 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)) {
- std::string msg;
- raw_string_ostream Msg(msg);
- Msg << "loadFromStack offset too big " << Offset;
- llvm_report_error(Msg.str());
- }
- 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 = MFI->getMachineModuleInfo();
- XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
- DebugLoc dl = (MBBI != MBB.end() ?
- MBBI->getDebugLoc() : DebugLoc::getUnknownLoc());
-
- 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.
- std::string msg;
- raw_string_ostream Msg(msg);
- Msg << "emitPrologue Frame size too big: " << FrameSize;
- llvm_report_error(Msg.str());
- }
- 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::DBG_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::DBG_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::DBG_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::DBG_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.
- std::string msg;
- raw_string_ostream Msg(msg);
- Msg << "emitEpilogue Frame size too big: " << FrameSize;
- llvm_report_error(Msg.str());
- }
-
- 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();
-unsigned XCoreRegisterInfo::getRARegister() const {
- return XCore::LR;
+ return TFI->hasFP(MF) ? XCore::R10 : XCore::SP;
}
-
-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"
-
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