#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineLocation.h"
#include "llvm/CodeGen/RegisterScavenging.h"
-#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Type.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/STLExtras.h"
+
+#define GET_REGINFO_TARGET_DESC
+#include "BlackfinGenRegisterInfo.inc"
+
using namespace llvm;
BlackfinRegisterInfo::BlackfinRegisterInfo(BlackfinSubtarget &st,
const TargetInstrInfo &tii)
- : BlackfinGenRegisterInfo(BF::ADJCALLSTACKDOWN, BF::ADJCALLSTACKUP),
- Subtarget(st),
- TII(tii) {}
+ : BlackfinGenRegisterInfo(BF::RETS), Subtarget(st), TII(tii) {}
const unsigned*
BlackfinRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
return CalleeSavedRegs;
}
-const TargetRegisterClass* const *BlackfinRegisterInfo::
-getCalleeSavedRegClasses(const MachineFunction *MF) const {
- using namespace BF;
- static const TargetRegisterClass * const CalleeSavedRegClasses[] = {
- &PRegClass,
- &DRegClass, &DRegClass, &DRegClass, &DRegClass,
- &PRegClass, &PRegClass, &PRegClass,
- 0 };
- return CalleeSavedRegClasses;
-}
-
BitVector
BlackfinRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
using namespace BF;
BitVector Reserved(getNumRegs());
+ Reserved.set(AZ);
+ Reserved.set(AN);
+ Reserved.set(AQ);
+ Reserved.set(AC0);
+ Reserved.set(AC1);
+ Reserved.set(AV0);
+ Reserved.set(AV0S);
+ Reserved.set(AV1);
+ Reserved.set(AV1S);
+ Reserved.set(V);
+ Reserved.set(VS);
+ Reserved.set(CYCLES).set(CYCLES2);
Reserved.set(L0);
Reserved.set(L1);
Reserved.set(L2);
Reserved.set(L3);
Reserved.set(SP);
Reserved.set(RETS);
- if (hasFP(MF))
+ if (TFI->hasFP(MF))
Reserved.set(FP);
return Reserved;
}
-const TargetRegisterClass*
-BlackfinRegisterInfo::getPhysicalRegisterRegClass(unsigned reg, MVT VT) const {
- assert(isPhysicalRegister(reg) && "reg must be a physical register");
-
- // Pick the smallest register class of the right type that contains
- // this physreg.
- const TargetRegisterClass* BestRC = 0;
- for (regclass_iterator I = regclass_begin(), E = regclass_end();
- I != E; ++I) {
- const TargetRegisterClass* RC = *I;
- if ((VT == MVT::Other || RC->hasType(VT)) && RC->contains(reg) &&
- (!BestRC || RC->getNumRegs() < BestRC->getNumRegs()))
- BestRC = RC;
- }
-
- assert(BestRC && "Couldn't find the register class");
- return BestRC;
-}
-
-// hasFP - 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.
-bool BlackfinRegisterInfo::hasFP(const MachineFunction &MF) const {
- const MachineFrameInfo *MFI = MF.getFrameInfo();
- return NoFramePointerElim || MFI->hasCalls() || MFI->hasVarSizedObjects();
-}
-
bool BlackfinRegisterInfo::
requiresRegisterScavenging(const MachineFunction &MF) const {
return true;
int delta) const {
if (!delta)
return;
- if (isImm<7>(delta)) {
+ if (isInt<7>(delta)) {
BuildMI(MBB, I, DL, TII.get(BF::ADDpp_imm7), Reg)
.addReg(Reg) // No kill on two-addr operand
.addImm(delta);
// We must load delta into ScratchReg and add that.
loadConstant(MBB, I, DL, ScratchReg, delta);
if (BF::PRegClass.contains(Reg)) {
- assert (BF::PRegClass.contains(ScratchReg));
+ assert(BF::PRegClass.contains(ScratchReg) &&
+ "ScratchReg must be a P register");
BuildMI(MBB, I, DL, TII.get(BF::ADDpp), Reg)
.addReg(Reg, RegState::Kill)
.addReg(ScratchReg, RegState::Kill);
} else {
- assert (BF::DRegClass.contains(Reg));
- assert (BF::DRegClass.contains(ScratchReg));
+ assert(BF::DRegClass.contains(Reg) && "Reg must be a D or P register");
+ assert(BF::DRegClass.contains(ScratchReg) &&
+ "ScratchReg must be a D register");
BuildMI(MBB, I, DL, TII.get(BF::ADD), Reg)
.addReg(Reg, RegState::Kill)
.addReg(ScratchReg, RegState::Kill);
DebugLoc DL,
unsigned Reg,
int value) const {
- if (isImm<7>(value)) {
+ if (isInt<7>(value)) {
BuildMI(MBB, I, DL, TII.get(BF::LOADimm7), Reg).addImm(value);
return;
}
- if (isUimm<16>(value)) {
+ if (isUInt<16>(value)) {
BuildMI(MBB, I, DL, TII.get(BF::LOADuimm16), Reg).addImm(value);
return;
}
- if (isImm<16>(value)) {
+ if (isInt<16>(value)) {
BuildMI(MBB, I, DL, TII.get(BF::LOADimm16), Reg).addImm(value);
return;
}
// We must split into halves
BuildMI(MBB, I, DL,
- TII.get(BF::LOAD16i), getSubReg(Reg, bfin_subreg_hi16))
+ TII.get(BF::LOAD16i), getSubReg(Reg, BF::hi16))
.addImm((value >> 16) & 0xffff)
.addReg(Reg, RegState::ImplicitDefine);
BuildMI(MBB, I, DL,
- TII.get(BF::LOAD16i), getSubReg(Reg, bfin_subreg_lo16))
+ TII.get(BF::LOAD16i), getSubReg(Reg, BF::lo16))
.addImm(value & 0xffff)
.addReg(Reg, RegState::ImplicitKill)
.addReg(Reg, RegState::ImplicitDefine);
eliminateCallFramePseudoInstr(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
- if (!hasReservedCallFrame(MF)) {
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
+ if (!TFI->hasReservedCallFrame(MF)) {
int64_t Amount = I->getOperand(0).getImm();
if (Amount != 0) {
- assert(Amount%4 == 0);
+ assert(Amount%4 == 0 && "Unaligned call frame size");
if (I->getOpcode() == BF::ADJCALLSTACKDOWN) {
adjustRegister(MBB, I, I->getDebugLoc(), BF::SP, BF::P1, -Amount);
} else {
- assert(I->getOpcode() == BF::ADJCALLSTACKUP);
+ assert(I->getOpcode() == BF::ADJCALLSTACKUP &&
+ "Unknown call frame pseudo instruction");
adjustRegister(MBB, I, I->getDebugLoc(), BF::SP, BF::P1, Amount);
}
}
const TargetRegisterClass *RC,
int SPAdj) {
assert(RS && "Register scavenging must be on");
- unsigned Reg = RS->FindUnusedReg(RC, true);
+ unsigned Reg = RS->FindUnusedReg(RC);
if (Reg == 0)
Reg = RS->scavengeRegister(RC, II, SPAdj);
return Reg;
}
-void BlackfinRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
- int SPAdj,
- RegScavenger *RS) const {
- unsigned i;
+void
+BlackfinRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
+ int SPAdj, RegScavenger *RS) const {
MachineInstr &MI = *II;
MachineBasicBlock &MBB = *MI.getParent();
MachineFunction &MF = *MBB.getParent();
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
DebugLoc DL = MI.getDebugLoc();
- for (i=0; !MI.getOperand(i).isFI(); i++) {
- assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
+ unsigned FIPos;
+ for (FIPos=0; !MI.getOperand(FIPos).isFI(); ++FIPos) {
+ assert(FIPos < MI.getNumOperands() &&
+ "Instr doesn't have FrameIndex operand!");
}
- int FrameIndex = MI.getOperand(i).getIndex();
- assert(i+1 < MI.getNumOperands() && MI.getOperand(i+1).isImm());
+ int FrameIndex = MI.getOperand(FIPos).getIndex();
+ assert(FIPos+1 < MI.getNumOperands() && MI.getOperand(FIPos+1).isImm());
int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex)
- + MI.getOperand(i+1).getImm();
+ + MI.getOperand(FIPos+1).getImm();
unsigned BaseReg = BF::FP;
- if (hasFP(MF)) {
- assert(SPAdj==0);
+ if (TFI->hasFP(MF)) {
+ assert(SPAdj==0 && "Unexpected SP adjust in function with frame pointer");
} else {
BaseReg = BF::SP;
Offset += MF.getFrameInfo()->getStackSize() + SPAdj;
case BF::STORE32fi:
isStore = true;
case BF::LOAD32fi: {
- assert(Offset%4 == 0 && "Badly aligned i32 stack access");
- assert(i==1);
- MI.getOperand(i).ChangeToRegister(BaseReg, false);
- MI.getOperand(i+1).setImm(Offset);
- if (isUimm<6>(Offset)) {
+ assert(Offset%4 == 0 && "Unaligned i32 stack access");
+ assert(FIPos==1 && "Bad frame index operand");
+ MI.getOperand(FIPos).ChangeToRegister(BaseReg, false);
+ MI.getOperand(FIPos+1).setImm(Offset);
+ if (isUInt<6>(Offset)) {
MI.setDesc(TII.get(isStore
? BF::STORE32p_uimm6m4
: BF::LOAD32p_uimm6m4));
return;
}
- if (BaseReg == BF::FP && isUimm<7>(-Offset)) {
+ if (BaseReg == BF::FP && isUInt<7>(-Offset)) {
MI.setDesc(TII.get(isStore
? BF::STORE32fp_nimm7m4
: BF::LOAD32fp_nimm7m4));
- MI.getOperand(i+1).setImm(-Offset);
+ MI.getOperand(FIPos+1).setImm(-Offset);
return;
}
- if (isImm<18>(Offset)) {
+ if (isInt<18>(Offset)) {
MI.setDesc(TII.get(isStore
? BF::STORE32p_imm18m4
: BF::LOAD32p_imm18m4));
break;
}
case BF::ADDpp: {
- assert(MI.getOperand(0).isReg());
+ assert(MI.getOperand(0).isReg() && "ADD instruction needs a register");
unsigned DestReg = MI.getOperand(0).getReg();
// We need to produce a stack offset in a P register. We emit:
// P0 = offset;
// P0 = BR + P0;
- assert(i==1);
+ assert(FIPos==1 && "Bad frame index operand");
loadConstant(MBB, II, DL, DestReg, Offset);
MI.getOperand(1).ChangeToRegister(DestReg, false, false, true);
MI.getOperand(2).ChangeToRegister(BaseReg, false);
case BF::STORE16fi:
isStore = true;
case BF::LOAD16fi: {
- assert(Offset%2 == 0 && "Badly aligned i16 stack access");
- assert(i==1);
+ assert(Offset%2 == 0 && "Unaligned i16 stack access");
+ assert(FIPos==1 && "Bad frame index operand");
// We need a P register to use as an address
unsigned ScratchReg = findScratchRegister(II, RS, &BF::PRegClass, SPAdj);
- assert(ScratchReg);
+ assert(ScratchReg && "Could not scavenge register");
loadConstant(MBB, II, DL, ScratchReg, Offset);
BuildMI(MBB, II, DL, TII.get(BF::ADDpp), ScratchReg)
.addReg(ScratchReg, RegState::Kill)
}
case BF::STORE8fi: {
// This is an AnyCC spill, we need a scratch register.
- assert(i==1);
+ assert(FIPos==1 && "Bad frame index operand");
MachineOperand SpillReg = MI.getOperand(0);
unsigned ScratchReg = findScratchRegister(II, RS, &BF::DRegClass, SPAdj);
- assert(ScratchReg);
+ assert(ScratchReg && "Could not scavenge register");
if (SpillReg.getReg()==BF::NCC) {
BuildMI(MBB, II, DL, TII.get(BF::MOVENCC_z), ScratchReg)
.addOperand(SpillReg);
// STORE D
MI.setDesc(TII.get(BF::STORE8p_imm16));
MI.getOperand(0).ChangeToRegister(ScratchReg, false, false, true);
- MI.getOperand(i).ChangeToRegister(BaseReg, false);
- MI.getOperand(i+1).setImm(Offset);
+ MI.getOperand(FIPos).ChangeToRegister(BaseReg, false);
+ MI.getOperand(FIPos+1).setImm(Offset);
break;
}
case BF::LOAD8fi: {
// This is an restore, we need a scratch register.
- assert(i==1);
+ assert(FIPos==1 && "Bad frame index operand");
MachineOperand SpillReg = MI.getOperand(0);
unsigned ScratchReg = findScratchRegister(II, RS, &BF::DRegClass, SPAdj);
- assert(ScratchReg);
+ assert(ScratchReg && "Could not scavenge register");
MI.setDesc(TII.get(BF::LOAD32p_imm16_8z));
MI.getOperand(0).ChangeToRegister(ScratchReg, true);
- MI.getOperand(i).ChangeToRegister(BaseReg, false);
- MI.getOperand(i+1).setImm(Offset);
+ MI.getOperand(FIPos).ChangeToRegister(BaseReg, false);
+ MI.getOperand(FIPos+1).setImm(Offset);
++II;
if (SpillReg.getReg()==BF::CC) {
// CC = D
}
}
-void BlackfinRegisterInfo::
-processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
- RegScavenger *RS) const {
- MachineFrameInfo *MFI = MF.getFrameInfo();
- const TargetRegisterClass *RC = BF::DPRegisterClass;
- if (requiresRegisterScavenging(MF)) {
- // Reserve a slot close to SP or frame pointer.
- RS->setScavengingFrameIndex(MFI->CreateStackObject(RC->getSize(),
- RC->getAlignment()));
- }
-}
-
-void BlackfinRegisterInfo::
-processFunctionBeforeFrameFinalized(MachineFunction &MF) const {
-}
-
-// Emit a prologue that sets up a stack frame.
-// On function entry, R0-R2 and P0 may hold arguments.
-// R3, P1, and P2 may be used as scratch registers
-void BlackfinRegisterInfo::emitPrologue(MachineFunction &MF) const {
- MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB
- MachineBasicBlock::iterator MBBI = MBB.begin();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- DebugLoc dl = (MBBI != MBB.end()
- ? MBBI->getDebugLoc()
- : DebugLoc::getUnknownLoc());
-
- int FrameSize = MFI->getStackSize();
- if (FrameSize%4) {
- FrameSize = (FrameSize+3) & ~3;
- MFI->setStackSize(FrameSize);
- }
-
- if (!hasFP(MF)) {
- // So far we only support FP elimination on leaf functions
- assert(!MFI->hasCalls());
- adjustRegister(MBB, MBBI, dl, BF::SP, BF::P1, -FrameSize);
- return;
- }
-
- // emit a LINK instruction
- if (FrameSize <= 0x3ffff) {
- BuildMI(MBB, MBBI, dl, TII.get(BF::LINK)).addImm(FrameSize);
- return;
- }
-
- // Frame is too big, do a manual LINK:
- // [--SP] = RETS;
- // [--SP] = FP;
- // FP = SP;
- // P1 = -FrameSize;
- // SP = SP + P1;
- BuildMI(MBB, MBBI, dl, TII.get(BF::PUSH))
- .addReg(BF::RETS, RegState::Kill);
- BuildMI(MBB, MBBI, dl, TII.get(BF::PUSH))
- .addReg(BF::FP, RegState::Kill);
- BuildMI(MBB, MBBI, dl, TII.get(BF::MOVE), BF::FP)
- .addReg(BF::SP);
- loadConstant(MBB, MBBI, dl, BF::P1, -FrameSize);
- BuildMI(MBB, MBBI, dl, TII.get(BF::ADDpp), BF::SP)
- .addReg(BF::SP, RegState::Kill)
- .addReg(BF::P1, RegState::Kill);
-
-}
-
-void BlackfinRegisterInfo::emitEpilogue(MachineFunction &MF,
- MachineBasicBlock &MBB) const {
- MachineFrameInfo *MFI = MF.getFrameInfo();
- MachineBasicBlock::iterator MBBI = prior(MBB.end());
- DebugLoc dl = MBBI->getDebugLoc();
+unsigned
+BlackfinRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
+ const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
- int FrameSize = MFI->getStackSize();
- assert(FrameSize%4 == 0 && "Misaligned frame size");
-
- if (!hasFP(MF)) {
- // So far we only support FP elimination on leaf functions
- assert(!MFI->hasCalls());
- adjustRegister(MBB, MBBI, dl, BF::SP, BF::P1, FrameSize);
- return;
- }
-
- // emit an UNLINK instruction
- BuildMI(MBB, MBBI, dl, TII.get(BF::UNLINK));
-}
-
-unsigned BlackfinRegisterInfo::getRARegister() const {
- return BF::RETS;
-}
-
-unsigned BlackfinRegisterInfo::getFrameRegister(MachineFunction &MF) const {
- return hasFP(MF) ? BF::FP : BF::SP;
-}
-
-int
-BlackfinRegisterInfo::getFrameIndexOffset(MachineFunction &MF, int FI) const {
- const TargetFrameInfo &TFI = *MF.getTarget().getFrameInfo();
- MachineFrameInfo *MFI = MF.getFrameInfo();
- return MFI->getObjectOffset(FI) + MFI->getStackSize() -
- TFI.getOffsetOfLocalArea() + MFI->getOffsetAdjustment();
+ return TFI->hasFP(MF) ? BF::FP : BF::SP;
}
unsigned BlackfinRegisterInfo::getEHExceptionRegister() const {
llvm_unreachable("What is the exception handler register");
return 0;
}
-
-int BlackfinRegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const {
- llvm_unreachable("What is the dwarf register number");
- return -1;
-}
-
-#include "BlackfinGenRegisterInfo.inc"
-
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