#include "XCore.h"
#include "XCoreInstrInfo.h"
#include "XCoreMachineFunctionInfo.h"
+#include "XCoreSubtarget.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
MachineBasicBlock::iterator MBBI, DebugLoc dl,
const TargetInstrInfo &TII,
MachineModuleInfo *MMI, unsigned DRegNum) {
- MCSymbol *Label = MMI->getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(XCore::PROLOG_LABEL)).addSym(Label);
- MMI->addFrameInst(MCCFIInstruction::createDefCfaRegister(Label, DRegNum));
+ unsigned CFIIndex = MMI->addFrameInst(
+ MCCFIInstruction::createDefCfaRegister(nullptr, DRegNum));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
}
static void EmitDefCfaOffset(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI, DebugLoc dl,
const TargetInstrInfo &TII,
MachineModuleInfo *MMI, int Offset) {
- MCSymbol *Label = MMI->getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(XCore::PROLOG_LABEL)).addSym(Label);
- MMI->addFrameInst(MCCFIInstruction::createDefCfaOffset(Label, -Offset));
+ unsigned CFIIndex =
+ MMI->addFrameInst(MCCFIInstruction::createDefCfaOffset(nullptr, -Offset));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
}
static void EmitCfiOffset(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI, DebugLoc dl,
const TargetInstrInfo &TII, MachineModuleInfo *MMI,
- unsigned DRegNum, int Offset, MCSymbol *Label) {
- if (!Label) {
- Label = MMI->getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(XCore::PROLOG_LABEL)).addSym(Label);
- }
- MMI->addFrameInst(MCCFIInstruction::createOffset(Label, DRegNum, Offset));
+ unsigned DRegNum, int Offset) {
+ unsigned CFIIndex = MMI->addFrameInst(
+ MCCFIInstruction::createOffset(nullptr, DRegNum, Offset));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
}
/// The SP register is moved in steps of 'MaxImmU16' towards the bottom of the
/// IfNeededLDAWSP emits the necessary LDAWSP instructions to move the SP only
/// as far as to make 'OffsetFromTop' reachable using an LDAWSP_lru6.
/// \param OffsetFromTop the spill offset from the top of the frame.
-/// \param [in,out] RemainingAdj the current SP offset from the top of the frame.
+/// \param [in,out] RemainingAdj the current SP offset from the top of the
+/// frame.
static void IfNeededLDAWSP(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI, DebugLoc dl,
const TargetInstrInfo &TII, int OffsetFromTop,
/// As offsets are negative, the largest offsets will be first.
static void GetEHSpillList(SmallVectorImpl<StackSlotInfo> &SpillList,
MachineFrameInfo *MFI, XCoreFunctionInfo *XFI,
+ const Constant *PersonalityFn,
const TargetLowering *TL) {
assert(XFI->hasEHSpillSlot() && "There are no EH register spill slots");
- const int* EHSlot = XFI->getEHSpillSlot();
- SpillList.push_back(StackSlotInfo(EHSlot[0],
- MFI->getObjectOffset(EHSlot[0]),
- TL->getExceptionPointerRegister()));
- SpillList.push_back(StackSlotInfo(EHSlot[0],
- MFI->getObjectOffset(EHSlot[1]),
- TL->getExceptionSelectorRegister()));
+ const int *EHSlot = XFI->getEHSpillSlot();
+ SpillList.push_back(
+ StackSlotInfo(EHSlot[0], MFI->getObjectOffset(EHSlot[0]),
+ TL->getExceptionPointerRegister(PersonalityFn)));
+ SpillList.push_back(
+ StackSlotInfo(EHSlot[0], MFI->getObjectOffset(EHSlot[1]),
+ TL->getExceptionSelectorRegister(PersonalityFn)));
std::sort(SpillList.begin(), SpillList.end(), CompareSSIOffset);
}
-
static MachineMemOperand *
getFrameIndexMMO(MachineBasicBlock &MBB, int FrameIndex, unsigned flags) {
MachineFunction *MF = MBB.getParent();
const MachineFrameInfo &MFI = *MF->getFrameInfo();
- MachineMemOperand *MMO =
- MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FrameIndex),
- flags, MFI.getObjectSize(FrameIndex),
- MFI.getObjectAlignment(FrameIndex));
+ MachineMemOperand *MMO = MF->getMachineMemOperand(
+ MachinePointerInfo::getFixedStack(*MF, FrameIndex), flags,
+ MFI.getObjectSize(FrameIndex), MFI.getObjectAlignment(FrameIndex));
return MMO;
}
MF.getFrameInfo()->hasVarSizedObjects();
}
-void XCoreFrameLowering::emitPrologue(MachineFunction &MF) const {
- MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB
+void XCoreFrameLowering::emitPrologue(MachineFunction &MF,
+ MachineBasicBlock &MBB) const {
+ assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported");
MachineBasicBlock::iterator MBBI = MBB.begin();
MachineFrameInfo *MFI = MF.getFrameInfo();
MachineModuleInfo *MMI = &MF.getMMI();
const MCRegisterInfo *MRI = MMI->getContext().getRegisterInfo();
- const XCoreInstrInfo &TII =
- *static_cast<const XCoreInstrInfo*>(MF.getTarget().getInstrInfo());
+ const XCoreInstrInfo &TII = *MF.getSubtarget<XCoreSubtarget>().getInstrInfo();
XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
- DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
+ // Debug location must be unknown since the first debug location is used
+ // to determine the end of the prologue.
+ DebugLoc dl;
if (MFI->getMaxAlignment() > getStackAlignment())
report_fatal_error("emitPrologue unsupported alignment: "
MBB.addLiveIn(XCore::LR);
MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII.get(Opcode));
MIB.addImm(Adjusted);
- MIB->addRegisterKilled(XCore::LR, MF.getTarget().getRegisterInfo(), true);
+ MIB->addRegisterKilled(XCore::LR, MF.getSubtarget().getRegisterInfo(),
+ true);
if (emitFrameMoves) {
EmitDefCfaOffset(MBB, MBBI, dl, TII, MMI, Adjusted*4);
unsigned DRegNum = MRI->getDwarfRegNum(XCore::LR, true);
- EmitCfiOffset(MBB, MBBI, dl, TII, MMI, DRegNum, 0, NULL);
+ EmitCfiOffset(MBB, MBBI, dl, TII, MMI, DRegNum, 0);
}
}
MachineMemOperand::MOStore));
if (emitFrameMoves) {
unsigned DRegNum = MRI->getDwarfRegNum(SpillList[i].Reg, true);
- EmitCfiOffset(MBB,MBBI,dl,TII,MMI, DRegNum, SpillList[i].Offset, NULL);
+ EmitCfiOffset(MBB, MBBI, dl, TII, MMI, DRegNum, SpillList[i].Offset);
}
}
if (emitFrameMoves) {
// Frame moves for callee saved.
- 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;
+ for (const auto &SpillLabel : XFI->getSpillLabels()) {
+ MachineBasicBlock::iterator Pos = SpillLabel.first;
+ ++Pos;
+ const CalleeSavedInfo &CSI = SpillLabel.second;
int Offset = MFI->getObjectOffset(CSI.getFrameIdx());
unsigned DRegNum = MRI->getDwarfRegNum(CSI.getReg(), true);
- EmitCfiOffset(MBB, MBBI, dl, TII, MMI, DRegNum, Offset, SpillLabel);
+ EmitCfiOffset(MBB, Pos, dl, TII, MMI, DRegNum, Offset);
}
if (XFI->hasEHSpillSlot()) {
// The unwinder requires stack slot & CFI offsets for the exception info.
// We do not save/spill these registers.
- SmallVector<StackSlotInfo,2> SpillList;
- GetEHSpillList(SpillList, MFI, XFI, MF.getTarget().getTargetLowering());
+ const Function *Fn = MF.getFunction();
+ const Constant *PersonalityFn =
+ Fn->hasPersonalityFn() ? Fn->getPersonalityFn() : nullptr;
+ SmallVector<StackSlotInfo, 2> SpillList;
+ GetEHSpillList(SpillList, MFI, XFI, PersonalityFn,
+ MF.getSubtarget().getTargetLowering());
assert(SpillList.size()==2 && "Unexpected SpillList size");
EmitCfiOffset(MBB, MBBI, dl, TII, MMI,
MRI->getDwarfRegNum(SpillList[0].Reg, true),
- SpillList[0].Offset, NULL);
+ SpillList[0].Offset);
EmitCfiOffset(MBB, MBBI, dl, TII, MMI,
MRI->getDwarfRegNum(SpillList[1].Reg, true),
- SpillList[1].Offset, NULL);
+ SpillList[1].Offset);
}
}
}
MachineBasicBlock &MBB) const {
MachineFrameInfo *MFI = MF.getFrameInfo();
MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
- const XCoreInstrInfo &TII =
- *static_cast<const XCoreInstrInfo*>(MF.getTarget().getInstrInfo());
+ const XCoreInstrInfo &TII = *MF.getSubtarget<XCoreSubtarget>().getInstrInfo();
XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
DebugLoc dl = MBBI->getDebugLoc();
unsigned RetOpcode = MBBI->getOpcode();
RemainingAdj /= 4;
if (RetOpcode == XCore::EH_RETURN) {
- // 'Restore' the exception info the unwinder has placed into the stack slots.
- SmallVector<StackSlotInfo,2> SpillList;
- GetEHSpillList(SpillList, MFI, XFI, MF.getTarget().getTargetLowering());
+ // 'Restore' the exception info the unwinder has placed into the stack
+ // slots.
+ const Function *Fn = MF.getFunction();
+ const Constant *PersonalityFn =
+ Fn->hasPersonalityFn() ? Fn->getPersonalityFn() : nullptr;
+ SmallVector<StackSlotInfo, 2> SpillList;
+ GetEHSpillList(SpillList, MFI, XFI, PersonalityFn,
+ MF.getSubtarget().getTargetLowering());
RestoreSpillList(MBB, MBBI, dl, TII, RemainingAdj, SpillList);
// Return to the landing pad.
return true;
MachineFunction *MF = MBB.getParent();
- const TargetInstrInfo &TII = *MF->getTarget().getInstrInfo();
+ const TargetInstrInfo &TII = *MF->getSubtarget().getInstrInfo();
XCoreFunctionInfo *XFI = MF->getInfo<XCoreFunctionInfo>();
bool emitFrameMoves = XCoreRegisterInfo::needsFrameMoves(*MF);
DebugLoc DL;
- if (MI != MBB.end())
+ if (MI != MBB.end() && !MI->isDebugValue())
DL = MI->getDebugLoc();
for (std::vector<CalleeSavedInfo>::const_iterator it = CSI.begin();
const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
TII.storeRegToStackSlot(MBB, MI, Reg, true, it->getFrameIdx(), RC, TRI);
if (emitFrameMoves) {
- MCSymbol *SaveLabel = MF->getContext().CreateTempSymbol();
- BuildMI(MBB, MI, DL, TII.get(XCore::PROLOG_LABEL)).addSym(SaveLabel);
- XFI->getSpillLabels().push_back(std::make_pair(SaveLabel, *it));
+ auto Store = MI;
+ --Store;
+ XFI->getSpillLabels().push_back(std::make_pair(Store, *it));
}
}
return true;
const std::vector<CalleeSavedInfo> &CSI,
const TargetRegisterInfo *TRI) const{
MachineFunction *MF = MBB.getParent();
- const TargetInstrInfo &TII = *MF->getTarget().getInstrInfo();
+ const TargetInstrInfo &TII = *MF->getSubtarget().getInstrInfo();
bool AtStart = MI == MBB.begin();
MachineBasicBlock::iterator BeforeI = MI;
if (!AtStart)
void XCoreFrameLowering::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
- const XCoreInstrInfo &TII =
- *static_cast<const XCoreInstrInfo*>(MF.getTarget().getInstrInfo());
+ const XCoreInstrInfo &TII = *MF.getSubtarget<XCoreSubtarget>().getInstrInfo();
if (!hasReservedCallFrame(MF)) {
// Turn the adjcallstackdown instruction into 'extsp <amt>' and the
// adjcallstackup instruction into 'ldaw sp, sp[<amt>]'
errs() << "eliminateCallFramePseudoInstr size too big: "
<< Amount << "\n";
#endif
- llvm_unreachable(0);
+ llvm_unreachable(nullptr);
}
MachineInstr *New;
MBB.insert(I, New);
}
}
-
+
MBB.erase(I);
}
-void XCoreFrameLowering::
-processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
- RegScavenger *RS) const {
+void XCoreFrameLowering::determineCalleeSaves(MachineFunction &MF,
+ BitVector &SavedRegs,
+ RegScavenger *RS) const {
+ TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
+
XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
- bool LRUsed = MF.getRegInfo().isPhysRegUsed(XCore::LR);
+ const MachineRegisterInfo &MRI = MF.getRegInfo();
+ bool LRUsed = MRI.isPhysRegModified(XCore::LR);
if (!LRUsed && !MF.getFunction()->isVarArg() &&
MF.getFrameInfo()->estimateStackSize(MF))
if (LRUsed) {
// We will handle the LR in the prologue/epilogue
// and allocate space on the stack ourselves.
- MF.getRegInfo().setPhysRegUnused(XCore::LR);
+ SavedRegs.reset(XCore::LR);
XFI->createLRSpillSlot(MF);
}
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