aboutsummaryrefslogtreecommitdiffstats
path: root/lib/Target/PowerPC/PPCFrameLowering.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/Target/PowerPC/PPCFrameLowering.cpp')
-rw-r--r--lib/Target/PowerPC/PPCFrameLowering.cpp60
1 files changed, 38 insertions, 22 deletions
diff --git a/lib/Target/PowerPC/PPCFrameLowering.cpp b/lib/Target/PowerPC/PPCFrameLowering.cpp
index 65e9cf2..dc87a6c 100644
--- a/lib/Target/PowerPC/PPCFrameLowering.cpp
+++ b/lib/Target/PowerPC/PPCFrameLowering.cpp
@@ -254,7 +254,7 @@ static void RemoveVRSaveCode(MachineInstr *MI) {
// transform this into the appropriate ORI instruction.
static void HandleVRSaveUpdate(MachineInstr *MI, const TargetInstrInfo &TII) {
MachineFunction *MF = MI->getParent()->getParent();
- const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
+ const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
DebugLoc dl = MI->getDebugLoc();
unsigned UsedRegMask = 0;
@@ -372,7 +372,7 @@ unsigned PPCFrameLowering::determineFrameLayout(MachineFunction &MF,
unsigned AlignMask = std::max(MaxAlign, TargetAlign) - 1;
const PPCRegisterInfo *RegInfo =
- static_cast<const PPCRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ static_cast<const PPCRegisterInfo *>(MF.getSubtarget().getRegisterInfo());
// If we are a leaf function, and use up to 224 bytes of stack space,
// don't have a frame pointer, calls, or dynamic alloca then we do not need
@@ -400,7 +400,8 @@ unsigned PPCFrameLowering::determineFrameLayout(MachineFunction &MF,
// Maximum call frame needs to be at least big enough for linkage area.
unsigned minCallFrameSize = getLinkageSize(Subtarget.isPPC64(),
- Subtarget.isDarwinABI());
+ Subtarget.isDarwinABI(),
+ Subtarget.isELFv2ABI());
maxCallFrameSize = std::max(maxCallFrameSize, minCallFrameSize);
// If we have dynamic alloca then maxCallFrameSize needs to be aligned so
@@ -459,9 +460,9 @@ void PPCFrameLowering::replaceFPWithRealFP(MachineFunction &MF) const {
unsigned FP8Reg = is31 ? PPC::X31 : PPC::X1;
const PPCRegisterInfo *RegInfo =
- static_cast<const PPCRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ static_cast<const PPCRegisterInfo *>(MF.getSubtarget().getRegisterInfo());
bool HasBP = RegInfo->hasBasePointer(MF);
- unsigned BPReg = HasBP ? (unsigned) PPC::R30 : FPReg;
+ unsigned BPReg = HasBP ? (unsigned) RegInfo->getBaseRegister(MF) : FPReg;
unsigned BP8Reg = HasBP ? (unsigned) PPC::X30 : FPReg;
for (MachineFunction::iterator BI = MF.begin(), BE = MF.end();
@@ -497,21 +498,23 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const {
MachineBasicBlock::iterator MBBI = MBB.begin();
MachineFrameInfo *MFI = MF.getFrameInfo();
const PPCInstrInfo &TII =
- *static_cast<const PPCInstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const PPCInstrInfo *>(MF.getSubtarget().getInstrInfo());
const PPCRegisterInfo *RegInfo =
- static_cast<const PPCRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ static_cast<const PPCRegisterInfo *>(MF.getSubtarget().getRegisterInfo());
MachineModuleInfo &MMI = MF.getMMI();
const MCRegisterInfo *MRI = MMI.getContext().getRegisterInfo();
DebugLoc dl;
bool needsFrameMoves = MMI.hasDebugInfo() ||
MF.getFunction()->needsUnwindTableEntry();
+ bool isPIC = MF.getTarget().getRelocationModel() == Reloc::PIC_;
// Get processor type.
bool isPPC64 = Subtarget.isPPC64();
// Get the ABI.
bool isDarwinABI = Subtarget.isDarwinABI();
bool isSVR4ABI = Subtarget.isSVR4ABI();
+ bool isELFv2ABI = Subtarget.isELFv2ABI();
assert((isDarwinABI || isSVR4ABI) &&
"Currently only Darwin and SVR4 ABIs are supported for PowerPC.");
@@ -546,7 +549,7 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const {
bool HasBP = RegInfo->hasBasePointer(MF);
unsigned SPReg = isPPC64 ? PPC::X1 : PPC::R1;
- unsigned BPReg = isPPC64 ? PPC::X30 : PPC::R30;
+ unsigned BPReg = RegInfo->getBaseRegister(MF);
unsigned FPReg = isPPC64 ? PPC::X31 : PPC::R31;
unsigned LRReg = isPPC64 ? PPC::LR8 : PPC::LR;
unsigned ScratchReg = isPPC64 ? PPC::X0 : PPC::R0;
@@ -602,7 +605,9 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const {
BPOffset = FFI->getObjectOffset(BPIndex);
} else {
BPOffset =
- PPCFrameLowering::getBasePointerSaveOffset(isPPC64, isDarwinABI);
+ PPCFrameLowering::getBasePointerSaveOffset(isPPC64,
+ isDarwinABI,
+ isPIC);
}
}
@@ -623,6 +628,9 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const {
"Prologue CR saving supported only in 64-bit mode");
if (!MustSaveCRs.empty()) { // will only occur for PPC64
+ // FIXME: In the ELFv2 ABI, we are not required to save all CR fields.
+ // If only one or two CR fields are clobbered, it could be more
+ // efficient to use mfocrf to selectively save just those fields.
MachineInstrBuilder MIB =
BuildMI(MBB, MBBI, dl, TII.get(PPC::MFCR8), TempReg);
for (unsigned i = 0, e = MustSaveCRs.size(); i != e; ++i)
@@ -791,8 +799,12 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF) const {
// For 64-bit SVR4 when we have spilled CRs, the spill location
// is SP+8, not a frame-relative slot.
if (isSVR4ABI && isPPC64 && (PPC::CR2 <= Reg && Reg <= PPC::CR4)) {
+ // In the ELFv1 ABI, only CR2 is noted in CFI and stands in for
+ // the whole CR word. In the ELFv2 ABI, every CR that was
+ // actually saved gets its own CFI record.
+ unsigned CRReg = isELFv2ABI? Reg : (unsigned) PPC::CR2;
unsigned CFIIndex = MMI.addFrameInst(MCCFIInstruction::createOffset(
- nullptr, MRI->getDwarfRegNum(PPC::CR2, true), 8));
+ nullptr, MRI->getDwarfRegNum(CRReg, true), 8));
BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex);
continue;
@@ -812,9 +824,9 @@ void PPCFrameLowering::emitEpilogue(MachineFunction &MF,
MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
assert(MBBI != MBB.end() && "Returning block has no terminator");
const PPCInstrInfo &TII =
- *static_cast<const PPCInstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const PPCInstrInfo *>(MF.getSubtarget().getInstrInfo());
const PPCRegisterInfo *RegInfo =
- static_cast<const PPCRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ static_cast<const PPCRegisterInfo *>(MF.getSubtarget().getRegisterInfo());
unsigned RetOpcode = MBBI->getOpcode();
DebugLoc dl;
@@ -839,6 +851,7 @@ void PPCFrameLowering::emitEpilogue(MachineFunction &MF,
// Get the ABI.
bool isDarwinABI = Subtarget.isDarwinABI();
bool isSVR4ABI = Subtarget.isSVR4ABI();
+ bool isPIC = MF.getTarget().getRelocationModel() == Reloc::PIC_;
// Check if the link register (LR) has been saved.
PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
@@ -849,7 +862,7 @@ void PPCFrameLowering::emitEpilogue(MachineFunction &MF,
bool HasBP = RegInfo->hasBasePointer(MF);
unsigned SPReg = isPPC64 ? PPC::X1 : PPC::R1;
- unsigned BPReg = isPPC64 ? PPC::X30 : PPC::R30;
+ unsigned BPReg = RegInfo->getBaseRegister(MF);
unsigned FPReg = isPPC64 ? PPC::X31 : PPC::R31;
unsigned ScratchReg = isPPC64 ? PPC::X0 : PPC::R0;
unsigned TempReg = isPPC64 ? PPC::X12 : PPC::R12; // another scratch reg
@@ -890,7 +903,9 @@ void PPCFrameLowering::emitEpilogue(MachineFunction &MF,
BPOffset = FFI->getObjectOffset(BPIndex);
} else {
BPOffset =
- PPCFrameLowering::getBasePointerSaveOffset(isPPC64, isDarwinABI);
+ PPCFrameLowering::getBasePointerSaveOffset(isPPC64,
+ isDarwinABI,
+ isPIC);
}
}
@@ -1054,7 +1069,7 @@ void
PPCFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *) const {
const PPCRegisterInfo *RegInfo =
- static_cast<const PPCRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ static_cast<const PPCRegisterInfo *>(MF.getSubtarget().getRegisterInfo());
// Save and clear the LR state.
PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
@@ -1067,6 +1082,7 @@ PPCFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
int FPSI = FI->getFramePointerSaveIndex();
bool isPPC64 = Subtarget.isPPC64();
bool isDarwinABI = Subtarget.isDarwinABI();
+ bool isPIC = MF.getTarget().getRelocationModel() == Reloc::PIC_;
MachineFrameInfo *MFI = MF.getFrameInfo();
// If the frame pointer save index hasn't been defined yet.
@@ -1081,7 +1097,7 @@ PPCFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
int BPSI = FI->getBasePointerSaveIndex();
if (!BPSI && RegInfo->hasBasePointer(MF)) {
- int BPOffset = getBasePointerSaveOffset(isPPC64, isDarwinABI);
+ int BPOffset = getBasePointerSaveOffset(isPPC64, isDarwinABI, isPIC);
// Allocate the frame index for the base pointer save area.
BPSI = MFI->CreateFixedObject(isPPC64? 8 : 4, BPOffset, true);
// Save the result.
@@ -1185,7 +1201,7 @@ void PPCFrameLowering::processFunctionBeforeFrameFinalized(MachineFunction &MF,
}
PPCFunctionInfo *PFI = MF.getInfo<PPCFunctionInfo>();
- const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
+ const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
int64_t LowerBound = 0;
@@ -1220,7 +1236,7 @@ void PPCFrameLowering::processFunctionBeforeFrameFinalized(MachineFunction &MF,
}
const PPCRegisterInfo *RegInfo =
- static_cast<const PPCRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ static_cast<const PPCRegisterInfo *>(MF.getSubtarget().getRegisterInfo());
if (RegInfo->hasBasePointer(MF)) {
HasGPSaveArea = true;
@@ -1368,7 +1384,7 @@ PPCFrameLowering::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineFunction *MF = MBB.getParent();
const PPCInstrInfo &TII =
- *static_cast<const PPCInstrInfo*>(MF->getTarget().getInstrInfo());
+ *static_cast<const PPCInstrInfo *>(MF->getSubtarget().getInstrInfo());
DebugLoc DL;
bool CRSpilled = false;
MachineInstrBuilder CRMIB;
@@ -1430,7 +1446,7 @@ restoreCRs(bool isPPC64, bool is31,
MachineFunction *MF = MBB.getParent();
const PPCInstrInfo &TII =
- *static_cast<const PPCInstrInfo*>(MF->getTarget().getInstrInfo());
+ *static_cast<const PPCInstrInfo *>(MF->getSubtarget().getInstrInfo());
DebugLoc DL;
unsigned RestoreOp, MoveReg;
@@ -1463,7 +1479,7 @@ void PPCFrameLowering::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
const PPCInstrInfo &TII =
- *static_cast<const PPCInstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const PPCInstrInfo *>(MF.getSubtarget().getInstrInfo());
if (MF.getTarget().Options.GuaranteedTailCallOpt &&
I->getOpcode() == PPC::ADJCALLSTACKUP) {
// Add (actually subtract) back the amount the callee popped on return.
@@ -1513,7 +1529,7 @@ PPCFrameLowering::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineFunction *MF = MBB.getParent();
const PPCInstrInfo &TII =
- *static_cast<const PPCInstrInfo*>(MF->getTarget().getInstrInfo());
+ *static_cast<const PPCInstrInfo *>(MF->getSubtarget().getInstrInfo());
bool CR2Spilled = false;
bool CR3Spilled = false;
bool CR4Spilled = false;
generated by cgit v1.1 at 2024-05-21 06:45:34 +0000