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Diffstat (limited to 'lib/Target/XCore/XCoreFrameLowering.cpp')
-rw-r--r--lib/Target/XCore/XCoreFrameLowering.cpp107
1 files changed, 52 insertions, 55 deletions
diff --git a/lib/Target/XCore/XCoreFrameLowering.cpp b/lib/Target/XCore/XCoreFrameLowering.cpp
index beeb07f831c6..c34b35c140f9 100644
--- a/lib/Target/XCore/XCoreFrameLowering.cpp
+++ b/lib/Target/XCore/XCoreFrameLowering.cpp
@@ -30,10 +30,6 @@
using namespace llvm;
// helper functions. FIXME: Eliminate.
-static inline bool isImmUs(unsigned val) {
- return val <= 11;
-}
-
static inline bool isImmU6(unsigned val) {
return val < (1 << 6);
}
@@ -92,11 +88,16 @@ void XCoreFrameLowering::emitPrologue(MachineFunction &MF) const {
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());
XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
+ if (MFI->getMaxAlignment() > getStackAlignment())
+ report_fatal_error("emitPrologue unsupported alignment: "
+ + Twine(MFI->getMaxAlignment()));
+
bool FP = hasFP(MF);
const AttributeSet &PAL = MF.getFunction()->getAttributes();
@@ -116,9 +117,9 @@ void XCoreFrameLowering::emitPrologue(MachineFunction &MF) const {
}
bool emitFrameMoves = XCoreRegisterInfo::needsFrameMoves(MF);
+ bool saveLR = XFI->getUsesLR();
// 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)) {
@@ -132,34 +133,28 @@ void XCoreFrameLowering::emitPrologue(MachineFunction &MF) const {
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));
-
+ MMI->addFrameInst(MCCFIInstruction::createDefCfaOffset(FrameLabel,
+ -FrameSize*4));
if (LRSavedOnEntry) {
- MachineLocation CSDst(MachineLocation::VirtualFP, 0);
- MachineLocation CSSrc(XCore::LR);
- Moves.push_back(MachineMove(FrameLabel, CSDst, CSSrc));
+ unsigned Reg = MRI->getDwarfRegNum(XCore::LR, true);
+ MMI->addFrameInst(MCCFIInstruction::createOffset(FrameLabel, Reg, 0));
}
}
- if (saveLR) {
- int LRSpillOffset = MFI->getObjectOffset(XFI->getLRSpillSlot());
- storeToStack(MBB, MBBI, XCore::LR, LRSpillOffset + FrameSize*4, dl, TII);
- MBB.addLiveIn(XCore::LR);
+ }
+ if (saveLR) {
+ int LRSpillOffset = MFI->getObjectOffset(XFI->getLRSpillSlot());
+ storeToStack(MBB, MBBI, XCore::LR, LRSpillOffset + FrameSize*4, dl, TII);
+ 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 (emitFrameMoves) {
+ MCSymbol *SaveLRLabel = MMI->getContext().CreateTempSymbol();
+ BuildMI(MBB, MBBI, dl, TII.get(XCore::PROLOG_LABEL)).addSym(SaveLRLabel);
+ unsigned Reg = MRI->getDwarfRegNum(XCore::LR, true);
+ MMI->addFrameInst(MCCFIInstruction::createOffset(SaveLRLabel, Reg,
+ LRSpillOffset));
}
}
@@ -172,37 +167,34 @@ void XCoreFrameLowering::emitPrologue(MachineFunction &MF) const {
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));
+ unsigned Reg = MRI->getDwarfRegNum(XCore::R10, true);
+ MMI->addFrameInst(MCCFIInstruction::createOffset(SaveR10Label, Reg,
+ FPSpillOffset));
}
// Set the FP from the SP.
unsigned FramePtr = XCore::R10;
- BuildMI(MBB, MBBI, dl, TII.get(XCore::LDAWSP_ru6), FramePtr)
- .addImm(0);
+ 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));
+ unsigned Reg = MRI->getDwarfRegNum(FramePtr, true);
+ MMI->addFrameInst(MCCFIInstruction::createDefCfaRegister(FrameLabel,
+ Reg));
}
}
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));
+ unsigned Reg = MRI->getDwarfRegNum(CSI.getReg(), true);
+ MMI->addFrameInst(MCCFIInstruction::createOffset(SpillLabel, Reg,
+ Offset));
}
}
}
@@ -213,6 +205,7 @@ void XCoreFrameLowering::emitEpilogue(MachineFunction &MF,
MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
const XCoreInstrInfo &TII =
*static_cast<const XCoreInstrInfo*>(MF.getTarget().getInstrInfo());
+ XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
DebugLoc dl = MBBI->getDebugLoc();
bool FP = hasFP(MF);
@@ -237,28 +230,32 @@ void XCoreFrameLowering::emitEpilogue(MachineFunction &MF,
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, TII);
+ }
- if (FP) {
- // Restore R10
- int FPSpillOffset = MFI->getObjectOffset(XFI->getFPSpillSlot());
- FPSpillOffset += FrameSize*4;
- loadFromStack(MBB, MBBI, XCore::R10, FPSpillOffset, dl, TII);
- }
- 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, TII);
- restoreLR = false;
- }
+ bool restoreLR = XFI->getUsesLR();
+ if (restoreLR &&
+ (FrameSize == 0 || MFI->getObjectOffset(XFI->getLRSpillSlot()) != 0)) {
+ int LRSpillOffset = MFI->getObjectOffset(XFI->getLRSpillSlot());
+ LRSpillOffset += FrameSize*4;
+ loadFromStack(MBB, MBBI, XCore::LR, LRSpillOffset, dl, TII);
+ restoreLR = false;
+ }
+
+ if (FrameSize) {
if (restoreLR) {
// Fold prologue into return instruction
+ assert(MFI->getObjectOffset(XFI->getLRSpillSlot()) == 0);
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);
+ MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII.get(Opcode)).addImm(FrameSize);
+ for (unsigned i = 3, e = MBBI->getNumOperands(); i < e; ++i)
+ MIB->addOperand(MBBI->getOperand(i)); // copy any variadic operands
MBB.erase(MBBI);
} else {
int Opcode = (isU6) ? XCore::LDAWSP_ru6 : XCore::LDAWSP_lru6;
generated by cgit v1.3 (git 2.53.0) at 2026-07-30 03:04:18 +0000