#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/STLExtras.h"
#include <cstdlib>
-using namespace llvm;
// FIXME This disables some code that aligns the stack to a boundary
// bigger than the default (16 bytes on Darwin) when there is a stack local
#define ALIGN_STACK 0
// FIXME (64-bit): Eventually enable by default.
+namespace llvm {
cl::opt<bool> EnablePPC32RS("enable-ppc32-regscavenger",
- cl::init(false),
- cl::desc("Enable PPC32 register scavenger"),
- cl::Hidden);
+ cl::init(false),
+ cl::desc("Enable PPC32 register scavenger"),
+ cl::Hidden);
cl::opt<bool> EnablePPC64RS("enable-ppc64-regscavenger",
- cl::init(false),
- cl::desc("Enable PPC64 register scavenger"),
- cl::Hidden);
+ cl::init(false),
+ cl::desc("Enable PPC64 register scavenger"),
+ cl::Hidden);
+}
+
+using namespace llvm;
+
#define EnableRegisterScavenging \
((EnablePPC32RS && !Subtarget.isPPC64()) || \
(EnablePPC64RS && Subtarget.isPPC64()))
return Subtarget.isPPC64() ? SVR4_64_CalleeSavedRegs : SVR4_CalleeSavedRegs;
}
-const TargetRegisterClass* const*
-PPCRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
- // 32-bit Darwin calling convention.
- static const TargetRegisterClass * const Darwin32_CalleeSavedRegClasses[] = {
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
-
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,
-
- &PPC::CRRCRegClass,&PPC::CRRCRegClass,&PPC::CRRCRegClass,
-
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
-
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
-
- &PPC::GPRCRegClass, 0
- };
-
- // 32-bit SVR4 calling convention.
- static const TargetRegisterClass * const SVR4_CalleeSavedRegClasses[] = {
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
- &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
-
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,
-
- &PPC::CRRCRegClass,&PPC::CRRCRegClass,&PPC::CRRCRegClass,
-
- &PPC::VRSAVERCRegClass,
-
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
-
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
-
- 0
- };
-
- // 64-bit Darwin calling convention.
- static const TargetRegisterClass * const Darwin64_CalleeSavedRegClasses[] = {
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,
-
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,
-
- &PPC::CRRCRegClass,&PPC::CRRCRegClass,&PPC::CRRCRegClass,
-
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
-
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
-
- &PPC::G8RCRegClass, 0
- };
-
- // 64-bit SVR4 calling convention.
- static const TargetRegisterClass * const SVR4_64_CalleeSavedRegClasses[] = {
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,
- &PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,&PPC::G8RCRegClass,
-
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,&PPC::F8RCRegClass,
- &PPC::F8RCRegClass,&PPC::F8RCRegClass,
-
- &PPC::CRRCRegClass,&PPC::CRRCRegClass,&PPC::CRRCRegClass,
-
- &PPC::VRSAVERCRegClass,
-
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
- &PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,&PPC::VRRCRegClass,
-
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,&PPC::CRBITRCRegClass,
- &PPC::CRBITRCRegClass,
-
- 0
- };
-
- if (Subtarget.isDarwinABI())
- return Subtarget.isPPC64() ? Darwin64_CalleeSavedRegClasses :
- Darwin32_CalleeSavedRegClasses;
-
- return Subtarget.isPPC64() ? SVR4_64_CalleeSavedRegClasses
- : SVR4_CalleeSavedRegClasses;
-}
-
// needsFP - Return true if the specified function should have a dedicated frame
// pointer register. This is true if the function has variable sized allocas or
// if frame pointer elimination is disabled.
//
static bool needsFP(const MachineFunction &MF) {
const MachineFrameInfo *MFI = MF.getFrameInfo();
- return NoFramePointerElim || MFI->hasVarSizedObjects() ||
+ // Naked functions have no stack frame pushed, so we don't have a frame pointer.
+ if (MF.getFunction()->hasFnAttr(Attribute::Naked))
+ return false;
+ return DisableFramePointerElim(MF) || MFI->hasVarSizedObjects() ||
(GuaranteedTailCallOpt && MF.getInfo<PPCFunctionInfo>()->hasFastCall());
}
// Get stack alignments.
unsigned TargetAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
unsigned MaxAlign = MFI->getMaxAlignment();
- assert(MaxAlign <= TargetAlign &&
- "Dynamic alloca with large aligns not supported");
+ if (MaxAlign > TargetAlign)
+ report_fatal_error("Dynamic alloca with large aligns not supported");
// Determine the previous frame's address. If FrameSize can't be
// represented as 16 bits or we need special alignment, then we load the
const TargetRegisterClass *GPRC = &PPC::GPRCRegClass;
const TargetRegisterClass *RC = Subtarget.isPPC64() ? G8RC : GPRC;
unsigned Reg = findScratchRegister(II, RS, RC, SPAdj);
+ unsigned SrcReg = MI.getOperand(0).getReg();
// We need to store the CR in the low 4-bits of the saved value. First, issue
- // an MFCR to save all of the CRBits. Add an implicit kill of the CR.
- if (!MI.getOperand(0).isKill())
- BuildMI(MBB, II, dl, TII.get(PPC::MFCR), Reg);
- else
- // Implicitly kill the CR register.
- BuildMI(MBB, II, dl, TII.get(PPC::MFCR), Reg)
- .addReg(MI.getOperand(0).getReg(), RegState::ImplicitKill);
+ // an MFCRpsued to save all of the CRBits and, if needed, kill the SrcReg.
+ BuildMI(MBB, II, dl, TII.get(PPC::MFCRpseud), Reg)
+ .addReg(SrcReg, getKillRegState(MI.getOperand(0).isKill()));
// If the saved register wasn't CR0, shift the bits left so that they are in
// CR0's slot.
- unsigned SrcReg = MI.getOperand(0).getReg();
if (SrcReg != PPC::CR0)
// rlwinm rA, rA, ShiftBits, 0, 31.
BuildMI(MBB, II, dl, TII.get(PPC::RLWINM), Reg)
// If we're not using a Frame Pointer that has been set to the value of the
// SP before having the stack size subtracted from it, then add the stack size
// to Offset to get the correct offset.
- Offset += MFI->getStackSize();
+ // Naked functions have stack size 0, although getStackSize may not reflect that
+ // because we didn't call all the pieces that compute it for naked functions.
+ if (!MF.getFunction()->hasFnAttr(Attribute::Naked))
+ Offset += MFI->getStackSize();
// If we can, encode the offset directly into the instruction. If this is a
// normal PPC "ri" instruction, any 16-bit value can be safely encoded. If
if (!DisableRedZone &&
FrameSize <= 224 && // Fits in red zone.
!MFI->hasVarSizedObjects() && // No dynamic alloca.
- !MFI->hasCalls() && // No calls.
+ !MFI->adjustsStack() && // No calls.
(!ALIGN_STACK || MaxAlign <= TargetAlign)) { // No special alignment.
// No need for frame
MFI->setStackSize(0);
int FPOffset = PPCFrameInfo::getFramePointerSaveOffset(isPPC64,
isDarwinABI);
// Allocate the frame index for frame pointer save area.
- FPSI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, FPOffset,
- true, false);
+ FPSI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, FPOffset, true);
// Save the result.
FI->setFramePointerSaveIndex(FPSI);
}
// Reserve stack space to move the linkage area to in case of a tail call.
int TCSPDelta = 0;
if (GuaranteedTailCallOpt && (TCSPDelta = FI->getTailCallSPDelta()) < 0) {
- MF.getFrameInfo()->CreateFixedObject(-1 * TCSPDelta, TCSPDelta,
- true, false);
+ MF.getFrameInfo()->CreateFixedObject(-1 * TCSPDelta, TCSPDelta, true);
}
// Reserve a slot closest to SP or frame pointer if we have a dynalloc or
for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
unsigned Reg = CSI[i].getReg();
- const TargetRegisterClass *RC = CSI[i].getRegClass();
-
- if (RC == PPC::GPRCRegisterClass) {
+ if (PPC::GPRCRegisterClass->contains(Reg)) {
HasGPSaveArea = true;
GPRegs.push_back(CSI[i]);
if (Reg < MinGPR) {
MinGPR = Reg;
}
- } else if (RC == PPC::G8RCRegisterClass) {
+ } else if (PPC::G8RCRegisterClass->contains(Reg)) {
HasG8SaveArea = true;
G8Regs.push_back(CSI[i]);
if (Reg < MinG8R) {
MinG8R = Reg;
}
- } else if (RC == PPC::F8RCRegisterClass) {
+ } else if (PPC::F8RCRegisterClass->contains(Reg)) {
HasFPSaveArea = true;
FPRegs.push_back(CSI[i]);
MinFPR = Reg;
}
// FIXME SVR4: Disable CR save area for now.
- } else if ( RC == PPC::CRBITRCRegisterClass
- || RC == PPC::CRRCRegisterClass) {
+ } else if (PPC::CRBITRCRegisterClass->contains(Reg)
+ || PPC::CRRCRegisterClass->contains(Reg)) {
// HasCRSaveArea = true;
- } else if (RC == PPC::VRSAVERCRegisterClass) {
+ } else if (PPC::VRSAVERCRegisterClass->contains(Reg)) {
HasVRSAVESaveArea = true;
- } else if (RC == PPC::VRRCRegisterClass) {
+ } else if (PPC::VRRCRegisterClass->contains(Reg)) {
HasVRSaveArea = true;
VRegs.push_back(CSI[i]);
// which have the CR/CRBIT register class?
// Adjust the frame index of the CR spill slot.
for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
- const TargetRegisterClass *RC = CSI[i].getRegClass();
+ unsigned Reg = CSI[i].getReg();
- if (RC == PPC::CRBITRCRegisterClass || RC == PPC::CRRCRegisterClass) {
+ if (PPC::CRBITRCRegisterClass->contains(Reg) ||
+ PPC::CRRCRegisterClass->contains(Reg)) {
int FI = CSI[i].getFrameIdx();
FFI->setObjectOffset(FI, LowerBound + FFI->getObjectOffset(FI));
// which have the VRSAVE register class?
// Adjust the frame index of the VRSAVE spill slot.
for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
- const TargetRegisterClass *RC = CSI[i].getRegClass();
+ unsigned Reg = CSI[i].getReg();
- if (RC == PPC::VRSAVERCRegisterClass) {
+ if (PPC::VRSAVERCRegisterClass->contains(Reg)) {
int FI = CSI[i].getFrameIdx();
FFI->setObjectOffset(FI, LowerBound + FFI->getObjectOffset(FI));
if (needsFrameMoves) {
// Mark effective beginning of when frame pointer becomes valid.
FrameLabel = MMI.getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(PPC::DBG_LABEL)).addSym(FrameLabel);
+ BuildMI(MBB, MBBI, dl, TII.get(PPC::PROLOG_LABEL)).addSym(FrameLabel);
// Show update of SP.
if (NegFrameSize) {
ReadyLabel = MMI.getContext().CreateTempSymbol();
// Mark effective beginning of when frame pointer is ready.
- BuildMI(MBB, MBBI, dl, TII.get(PPC::DBG_LABEL)).addSym(ReadyLabel);
+ BuildMI(MBB, MBBI, dl, TII.get(PPC::PROLOG_LABEL)).addSym(ReadyLabel);
MachineLocation FPDst(HasFP ? (isPPC64 ? PPC::X31 : PPC::R31) :
(isPPC64 ? PPC::X1 : PPC::R1));
}
#include "PPCGenRegisterInfo.inc"
-
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