#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineLocation.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/SelectionDAGNodes.h"
+#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/STLExtras.h"
#include <cstdlib>
case SPU::R126: return 126;
case SPU::R127: return 127;
default:
- cerr << "Unhandled reg in SPURegisterInfo::getRegisterNumbering!\n";
- abort();
+ report_fatal_error("Unhandled reg in SPURegisterInfo::getRegisterNumbering");
}
}
{
}
-// SPU's 128-bit registers used for argument passing:
-static const unsigned SPU_ArgRegs[] = {
- SPU::R3, SPU::R4, SPU::R5, SPU::R6, SPU::R7, SPU::R8, SPU::R9,
- SPU::R10, SPU::R11, SPU::R12, SPU::R13, SPU::R14, SPU::R15, SPU::R16,
- SPU::R17, SPU::R18, SPU::R19, SPU::R20, SPU::R21, SPU::R22, SPU::R23,
- SPU::R24, SPU::R25, SPU::R26, SPU::R27, SPU::R28, SPU::R29, SPU::R30,
- SPU::R31, SPU::R32, SPU::R33, SPU::R34, SPU::R35, SPU::R36, SPU::R37,
- SPU::R38, SPU::R39, SPU::R40, SPU::R41, SPU::R42, SPU::R43, SPU::R44,
- SPU::R45, SPU::R46, SPU::R47, SPU::R48, SPU::R49, SPU::R50, SPU::R51,
- SPU::R52, SPU::R53, SPU::R54, SPU::R55, SPU::R56, SPU::R57, SPU::R58,
- SPU::R59, SPU::R60, SPU::R61, SPU::R62, SPU::R63, SPU::R64, SPU::R65,
- SPU::R66, SPU::R67, SPU::R68, SPU::R69, SPU::R70, SPU::R71, SPU::R72,
- SPU::R73, SPU::R74, SPU::R75, SPU::R76, SPU::R77, SPU::R78, SPU::R79
-};
-
-const unsigned *
-SPURegisterInfo::getArgRegs()
-{
- return SPU_ArgRegs;
-}
-
-unsigned
-SPURegisterInfo::getNumArgRegs()
-{
- return sizeof(SPU_ArgRegs) / sizeof(SPU_ArgRegs[0]);
+/// getPointerRegClass - Return the register class to use to hold pointers.
+/// This is used for addressing modes.
+const TargetRegisterClass *
+SPURegisterInfo::getPointerRegClass(unsigned Kind) const {
+ return &SPU::R32CRegClass;
}
const unsigned *
SPU::R0, /* link register */
0 /* end */
};
-
- return SPU_CalleeSaveRegs;
-}
-const TargetRegisterClass* const*
-SPURegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const
-{
- // Cell ABI Calling Convention
- static const TargetRegisterClass * const SPU_CalleeSaveRegClasses[] = {
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, &SPU::GPRCRegClass, &SPU::GPRCRegClass,
- &SPU::GPRCRegClass, /* environment pointer */
- &SPU::GPRCRegClass, /* stack pointer */
- &SPU::GPRCRegClass, /* link register */
- 0 /* end */
- };
-
- return SPU_CalleeSaveRegClasses;
+ return SPU_CalleeSaveRegs;
}
/*!
//
static bool needsFP(const MachineFunction &MF) {
const MachineFrameInfo *MFI = MF.getFrameInfo();
- return NoFramePointerElim || MFI->hasVarSizedObjects();
+ return DisableFramePointerElim(MF) || MFI->hasVarSizedObjects();
}
//--------------------------------------------------------------------------
MachineBasicBlock &MBB = *MI.getParent();
MachineFunction &MF = *MBB.getParent();
MachineFrameInfo *MFI = MF.getFrameInfo();
+ DebugLoc dl = II->getDebugLoc();
- while (!MI.getOperand(i).isFrameIndex()) {
+ while (!MI.getOperand(i).isFI()) {
++i;
assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
}
// Now add the frame object offset to the offset from r1.
int Offset = MFI->getObjectOffset(FrameIndex);
- // Most instructions, except for generated FrameIndex additions using AIr32,
- // have the immediate in operand 1. AIr32, in this case, has the immediate
- // in operand 2.
- unsigned OpNo = (MI.getOpcode() != SPU::AIr32 ? 1 : 2);
+ // Most instructions, except for generated FrameIndex additions using AIr32
+ // and ILAr32, have the immediate in operand 1. AIr32 and ILAr32 have the
+ // immediate in operand 2.
+ unsigned OpNo = 1;
+ if (MI.getOpcode() == SPU::AIr32 || MI.getOpcode() == SPU::ILAr32)
+ OpNo = 2;
+
MachineOperand &MO = MI.getOperand(OpNo);
// Offset is biased by $lr's slot at the bottom.
// Replace the FrameIndex with base register with $sp (aka $r1)
SPOp.ChangeToRegister(SPU::R1, false);
- if (Offset > SPUFrameInfo::maxFrameOffset()
- || Offset < SPUFrameInfo::minFrameOffset()) {
- cerr << "Large stack adjustment ("
- << Offset
- << ") in SPURegisterInfo::eliminateFrameIndex.";
+
+ // if 'Offset' doesn't fit to the D-form instruction's
+ // immediate, convert the instruction to X-form
+ // if the instruction is not an AI (which takes a s10 immediate), assume
+ // it is a load/store that can take a s14 immediate
+ if ((MI.getOpcode() == SPU::AIr32 && !isInt<10>(Offset))
+ || !isInt<14>(Offset)) {
+ int newOpcode = convertDFormToXForm(MI.getOpcode());
+ unsigned tmpReg = findScratchRegister(II, RS, &SPU::R32CRegClass, SPAdj);
+ BuildMI(MBB, II, dl, TII.get(SPU::ILr32), tmpReg )
+ .addImm(Offset);
+ BuildMI(MBB, II, dl, TII.get(newOpcode), MI.getOperand(0).getReg())
+ .addReg(tmpReg, RegState::Kill)
+ .addReg(SPU::R1);
+ // remove the replaced D-form instruction
+ MBB.erase(II);
} else {
MO.ChangeToImmediate(Offset);
}
// Get the number of bytes to allocate from the FrameInfo
unsigned FrameSize = MFI->getStackSize();
-
+
// Get the alignments provided by the target, and the maximum alignment
// (if any) of the fixed frame objects.
unsigned TargetAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
// Get the maximum call frame size of all the calls.
unsigned maxCallFrameSize = MFI->getMaxCallFrameSize();
-
+
// If we have dynamic alloca then maxCallFrameSize needs to be aligned so
// that allocations will be aligned.
if (MFI->hasVarSizedObjects())
// Update maximum call frame size.
MFI->setMaxCallFrameSize(maxCallFrameSize);
-
+
// Include call frame size in total.
FrameSize += maxCallFrameSize;
void SPURegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS)
const {
-#if 0
- // Save and clear the LR state.
- SPUFunctionInfo *FI = MF.getInfo<SPUFunctionInfo>();
- FI->setUsesLR(MF.getRegInfo().isPhysRegUsed(LR));
-#endif
// Mark LR and SP unused, since the prolog spills them to stack and
// we don't want anyone else to spill them for us.
//
MF.getRegInfo().setPhysRegUnused(SPU::R0);
MF.getRegInfo().setPhysRegUnused(SPU::R1);
MF.getRegInfo().setPhysRegUnused(SPU::R2);
+
+ MachineFrameInfo *MFI = MF.getFrameInfo();
+ const TargetRegisterClass *RC = &SPU::R32CRegClass;
+ RS->setScavengingFrameIndex(MFI->CreateStackObject(RC->getSize(),
+ RC->getAlignment(),
+ false));
+
+
}
void SPURegisterInfo::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();
-
+ MachineModuleInfo &MMI = MF.getMMI();
+ DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
+
// Prepare for debug frame info.
- bool hasDebugInfo = MMI && MMI->hasDebugInfo();
- unsigned FrameLabelId = 0;
-
+ bool hasDebugInfo = MMI.hasDebugInfo();
+ MCSymbol *FrameLabel = 0;
+
// Move MBBI back to the beginning of the function.
MBBI = MBB.begin();
-
+
// Work out frame sizes.
determineFrameLayout(MF);
int FrameSize = MFI->getStackSize();
-
+
assert((FrameSize & 0xf) == 0
&& "SPURegisterInfo::emitPrologue: FrameSize not aligned");
- if (FrameSize > 0) {
+ // the "empty" frame size is 16 - just the register scavenger spill slot
+ if (FrameSize > 16 || MFI->adjustsStack()) {
FrameSize = -(FrameSize + SPUFrameInfo::minStackSize());
if (hasDebugInfo) {
// Mark effective beginning of when frame pointer becomes valid.
- FrameLabelId = MMI->NextLabelID();
- BuildMI(MBB, MBBI, TII.get(SPU::LABEL)).addImm(FrameLabelId).addImm(0);
+ FrameLabel = MMI.getContext().CreateTempSymbol();
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::PROLOG_LABEL)).addSym(FrameLabel);
}
-
+
// Adjust stack pointer, spilling $lr -> 16($sp) and $sp -> -FrameSize($sp)
// for the ABI
- BuildMI(MBB, MBBI, TII.get(SPU::STQDr32), SPU::R0).addImm(16)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::STQDr32), SPU::R0).addImm(16)
.addReg(SPU::R1);
- if (isS10Constant(FrameSize)) {
+ if (isInt<10>(FrameSize)) {
// Spill $sp to adjusted $sp
- BuildMI(MBB, MBBI, TII.get(SPU::STQDr32), SPU::R1).addImm(FrameSize)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::STQDr32), SPU::R1).addImm(FrameSize)
.addReg(SPU::R1);
// Adjust $sp by required amout
- BuildMI(MBB, MBBI, TII.get(SPU::AIr32), SPU::R1).addReg(SPU::R1)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::AIr32), SPU::R1).addReg(SPU::R1)
.addImm(FrameSize);
- } else if (FrameSize <= (1 << 16) - 1 && FrameSize >= -(1 << 16)) {
+ } else if (isInt<16>(FrameSize)) {
// Frame size can be loaded into ILr32n, so temporarily spill $r2 and use
// $r2 to adjust $sp:
- BuildMI(MBB, MBBI, TII.get(SPU::STQDr128), SPU::R2)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::STQDr128), SPU::R2)
.addImm(-16)
.addReg(SPU::R1);
- BuildMI(MBB, MBBI, TII.get(SPU::ILr32), SPU::R2)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::ILr32), SPU::R2)
.addImm(FrameSize);
- BuildMI(MBB, MBBI, TII.get(SPU::STQDr32), SPU::R1)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::STQXr32), SPU::R1)
.addReg(SPU::R2)
.addReg(SPU::R1);
- BuildMI(MBB, MBBI, TII.get(SPU::Ar32), SPU::R1)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::Ar32), SPU::R1)
.addReg(SPU::R1)
.addReg(SPU::R2);
- BuildMI(MBB, MBBI, TII.get(SPU::SFIr32), SPU::R2)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::SFIr32), SPU::R2)
.addReg(SPU::R2)
.addImm(16);
- BuildMI(MBB, MBBI, TII.get(SPU::LQXr128), SPU::R2)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::LQXr128), SPU::R2)
.addReg(SPU::R2)
.addReg(SPU::R1);
} else {
- cerr << "Unhandled frame size: " << FrameSize << "\n";
- abort();
+ report_fatal_error("Unhandled frame size: " + Twine(FrameSize));
}
-
+
if (hasDebugInfo) {
- std::vector<MachineMove> &Moves = MMI->getFrameMoves();
-
+ std::vector<MachineMove> &Moves = MMI.getFrameMoves();
+
// Show update of SP.
MachineLocation SPDst(MachineLocation::VirtualFP);
MachineLocation SPSrc(MachineLocation::VirtualFP, -FrameSize);
- Moves.push_back(MachineMove(FrameLabelId, SPDst, SPSrc));
-
+ Moves.push_back(MachineMove(FrameLabel, SPDst, SPSrc));
+
// Add callee saved registers to move list.
const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
for (unsigned I = 0, E = CSI.size(); I != E; ++I) {
if (Reg == SPU::R0) continue;
MachineLocation CSDst(MachineLocation::VirtualFP, Offset);
MachineLocation CSSrc(Reg);
- Moves.push_back(MachineMove(FrameLabelId, CSDst, CSSrc));
+ Moves.push_back(MachineMove(FrameLabel, CSDst, CSSrc));
}
-
+
// Mark effective beginning of when frame pointer is ready.
- unsigned ReadyLabelId = MMI->NextLabelID();
- BuildMI(MBB, MBBI, TII.get(SPU::LABEL)).addImm(ReadyLabelId).addImm(0);
-
+ MCSymbol *ReadyLabel = MMI.getContext().CreateTempSymbol();
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::PROLOG_LABEL)).addSym(ReadyLabel);
+
MachineLocation FPDst(SPU::R1);
MachineLocation FPSrc(MachineLocation::VirtualFP);
- Moves.push_back(MachineMove(ReadyLabelId, FPDst, FPSrc));
+ Moves.push_back(MachineMove(ReadyLabel, FPDst, FPSrc));
}
} else {
// This is a leaf function -- insert a branch hint iff there are
// this is just a best guess based on the basic block's size.
if (MBB.size() >= (unsigned) SPUFrameInfo::branchHintPenalty()) {
MachineBasicBlock::iterator MBBI = prior(MBB.end());
+ dl = MBBI->getDebugLoc();
+
// Insert terminator label
- unsigned BranchLabelId = MMI->NextLabelID();
- BuildMI(MBB, MBBI, TII.get(SPU::LABEL)).addImm(BranchLabelId).addImm(0);
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::PROLOG_LABEL))
+ .addSym(MMI.getContext().CreateTempSymbol());
}
}
}
const MachineFrameInfo *MFI = MF.getFrameInfo();
int FrameSize = MFI->getStackSize();
int LinkSlotOffset = SPUFrameInfo::stackSlotSize();
+ DebugLoc dl = MBBI->getDebugLoc();
assert(MBBI->getOpcode() == SPU::RET &&
"Can only insert epilog into returning blocks");
assert((FrameSize & 0xf) == 0
&& "SPURegisterInfo::emitEpilogue: FrameSize not aligned");
- if (FrameSize > 0) {
+
+ // the "empty" frame size is 16 - just the register scavenger spill slot
+ if (FrameSize > 16 || MFI->adjustsStack()) {
FrameSize = FrameSize + SPUFrameInfo::minStackSize();
- if (isS10Constant(FrameSize + LinkSlotOffset)) {
+ if (isInt<10>(FrameSize + LinkSlotOffset)) {
// Reload $lr, adjust $sp by required amount
// Note: We do this to slightly improve dual issue -- not by much, but it
// is an opportunity for dual issue.
- BuildMI(MBB, MBBI, TII.get(SPU::LQDr128), SPU::R0)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::LQDr128), SPU::R0)
.addImm(FrameSize + LinkSlotOffset)
.addReg(SPU::R1);
- BuildMI(MBB, MBBI, TII.get(SPU::AIr32), SPU::R1)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::AIr32), SPU::R1)
.addReg(SPU::R1)
.addImm(FrameSize);
} else if (FrameSize <= (1 << 16) - 1 && FrameSize >= -(1 << 16)) {
// Frame size can be loaded into ILr32n, so temporarily spill $r2 and use
// $r2 to adjust $sp:
- BuildMI(MBB, MBBI, TII.get(SPU::STQDr128), SPU::R2)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::STQDr128), SPU::R2)
.addImm(16)
.addReg(SPU::R1);
- BuildMI(MBB, MBBI, TII.get(SPU::ILr32), SPU::R2)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::ILr32), SPU::R2)
.addImm(FrameSize);
- BuildMI(MBB, MBBI, TII.get(SPU::Ar32), SPU::R1)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::Ar32), SPU::R1)
.addReg(SPU::R1)
.addReg(SPU::R2);
- BuildMI(MBB, MBBI, TII.get(SPU::LQDr128), SPU::R0)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::LQDr128), SPU::R0)
.addImm(16)
- .addReg(SPU::R2);
- BuildMI(MBB, MBBI, TII.get(SPU::SFIr32), SPU::R2).
+ .addReg(SPU::R1);
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::SFIr32), SPU::R2).
addReg(SPU::R2)
.addImm(16);
- BuildMI(MBB, MBBI, TII.get(SPU::LQXr128), SPU::R2)
+ BuildMI(MBB, MBBI, dl, TII.get(SPU::LQXr128), SPU::R2)
.addReg(SPU::R2)
.addReg(SPU::R1);
} else {
- cerr << "Unhandled frame size: " << FrameSize << "\n";
- abort();
+ report_fatal_error("Unhandled frame size: " + Twine(FrameSize));
}
}
}
}
unsigned
-SPURegisterInfo::getFrameRegister(MachineFunction &MF) const
+SPURegisterInfo::getFrameRegister(const MachineFunction &MF) const
{
return SPU::R1;
}
return SPUGenRegisterInfo::getDwarfRegNumFull(RegNum, 0);
}
+int
+SPURegisterInfo::convertDFormToXForm(int dFormOpcode) const
+{
+ switch(dFormOpcode)
+ {
+ case SPU::AIr32: return SPU::Ar32;
+ case SPU::LQDr32: return SPU::LQXr32;
+ case SPU::LQDr128: return SPU::LQXr128;
+ case SPU::LQDv16i8: return SPU::LQXv16i8;
+ case SPU::LQDv4i32: return SPU::LQXv4i32;
+ case SPU::LQDv4f32: return SPU::LQXv4f32;
+ case SPU::STQDr32: return SPU::STQXr32;
+ case SPU::STQDr128: return SPU::STQXr128;
+ case SPU::STQDv16i8: return SPU::STQXv16i8;
+ case SPU::STQDv4i32: return SPU::STQXv4i32;
+ case SPU::STQDv4f32: return SPU::STQXv4f32;
+
+ default: assert( false && "Unhandled D to X-form conversion");
+ }
+ // default will assert, but need to return something to keep the
+ // compiler happy.
+ return dFormOpcode;
+}
+
+// TODO this is already copied from PPC. Could this convenience function
+// be moved to the RegScavenger class?
+unsigned
+SPURegisterInfo::findScratchRegister(MachineBasicBlock::iterator II,
+ RegScavenger *RS,
+ const TargetRegisterClass *RC,
+ int SPAdj) const
+{
+ assert(RS && "Register scavenging must be on");
+ unsigned Reg = RS->FindUnusedReg(RC);
+ if (Reg == 0)
+ Reg = RS->scavengeRegister(RC, II, SPAdj);
+ assert( Reg && "Register scavenger failed");
+ return Reg;
+}
+
#include "SPUGenRegisterInfo.inc"
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