namespace {
class AArch64FastISel : public FastISel {
-
class Address {
public:
typedef enum {
private:
BaseKind Kind;
+ AArch64_AM::ShiftExtendType ExtType;
union {
unsigned Reg;
int FI;
} Base;
+ unsigned OffsetReg;
+ unsigned Shift;
int64_t Offset;
const GlobalValue *GV;
public:
- Address() : Kind(RegBase), Offset(0), GV(nullptr) { Base.Reg = 0; }
+ Address() : Kind(RegBase), ExtType(AArch64_AM::InvalidShiftExtend),
+ OffsetReg(0), Shift(0), Offset(0), GV(nullptr) { Base.Reg = 0; }
void setKind(BaseKind K) { Kind = K; }
BaseKind getKind() const { return Kind; }
+ void setExtendType(AArch64_AM::ShiftExtendType E) { ExtType = E; }
+ AArch64_AM::ShiftExtendType getExtendType() const { return ExtType; }
bool isRegBase() const { return Kind == RegBase; }
bool isFIBase() const { return Kind == FrameIndexBase; }
void setReg(unsigned Reg) {
assert(isRegBase() && "Invalid base register access!");
return Base.Reg;
}
+ void setOffsetReg(unsigned Reg) {
+ assert(isRegBase() && "Invalid offset register access!");
+ OffsetReg = Reg;
+ }
+ unsigned getOffsetReg() const {
+ assert(isRegBase() && "Invalid offset register access!");
+ return OffsetReg;
+ }
void setFI(unsigned FI) {
assert(isFIBase() && "Invalid base frame index access!");
Base.FI = FI;
}
void setOffset(int64_t O) { Offset = O; }
int64_t getOffset() { return Offset; }
+ void setShift(unsigned S) { Shift = S; }
+ unsigned getShift() { return Shift; }
void setGlobalValue(const GlobalValue *G) { GV = G; }
const GlobalValue *getGlobalValue() { return GV; }
-
- bool isValid() { return isFIBase() || (isRegBase() && getReg() != 0); }
};
/// Subtarget - Keep a pointer to the AArch64Subtarget around so that we can
// Utility helper routines.
bool isTypeLegal(Type *Ty, MVT &VT);
bool isLoadStoreTypeLegal(Type *Ty, MVT &VT);
- bool ComputeAddress(const Value *Obj, Address &Addr);
+ bool ComputeAddress(const Value *Obj, Address &Addr, Type *Ty = nullptr);
bool ComputeCallAddress(const Value *V, Address &Addr);
- bool SimplifyAddress(Address &Addr, MVT VT, int64_t ScaleFactor,
- bool UseUnscaled);
+ bool SimplifyAddress(Address &Addr, MVT VT);
void AddLoadStoreOperands(Address &Addr, const MachineInstrBuilder &MIB,
- unsigned Flags, MachineMemOperand *MMO,
- bool UseUnscaled);
+ unsigned Flags, unsigned ScaleFactor,
+ MachineMemOperand *MMO);
bool IsMemCpySmall(uint64_t Len, unsigned Alignment);
bool TryEmitSmallMemCpy(Address Dest, Address Src, uint64_t Len,
unsigned Alignment);
// Emit functions.
bool EmitCmp(Value *Src1Value, Value *Src2Value, bool isZExt);
bool EmitLoad(MVT VT, unsigned &ResultReg, Address Addr,
- MachineMemOperand *MMO = nullptr, bool UseUnscaled = false);
+ MachineMemOperand *MMO = nullptr);
bool EmitStore(MVT VT, unsigned SrcReg, Address Addr,
- MachineMemOperand *MMO = nullptr, bool UseUnscaled = false);
+ MachineMemOperand *MMO = nullptr);
unsigned EmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT, bool isZExt);
unsigned Emiti1Ext(unsigned SrcReg, MVT DestVT, bool isZExt);
unsigned Emit_MUL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
unsigned Emit_LSR_ri(MVT RetVT, unsigned Op0, bool Op0IsKill, uint64_t Imm);
unsigned Emit_ASR_ri(MVT RetVT, unsigned Op0, bool Op0IsKill, uint64_t Imm);
+ unsigned AArch64MaterializeInt(const ConstantInt *CI, MVT VT);
unsigned AArch64MaterializeFP(const ConstantFP *CFP, MVT VT);
unsigned AArch64MaterializeGV(const GlobalValue *GV);
return 0;
}
+unsigned AArch64FastISel::AArch64MaterializeInt(const ConstantInt *CI, MVT VT) {
+ if (VT > MVT::i64)
+ return 0;
+
+ if (!CI->isZero())
+ return FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue());
+
+ // Create a copy from the zero register to materialize a "0" value.
+ const TargetRegisterClass *RC = (VT == MVT::i64) ? &AArch64::GPR64RegClass
+ : &AArch64::GPR32RegClass;
+ unsigned ZeroReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR;
+ unsigned ResultReg = createResultReg(RC);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(TargetOpcode::COPY), ResultReg)
+ .addReg(ZeroReg, getKillRegState(true));
+ return ResultReg;
+}
+
unsigned AArch64FastISel::AArch64MaterializeFP(const ConstantFP *CFP, MVT VT) {
if (VT != MVT::f32 && VT != MVT::f64)
return 0;
const APFloat Val = CFP->getValueAPF();
- bool is64bit = (VT == MVT::f64);
+ bool Is64Bit = (VT == MVT::f64);
// This checks to see if we can use FMOV instructions to materialize
// a constant, otherwise we have to materialize via the constant pool.
if (TLI.isFPImmLegal(Val, VT)) {
- int Imm;
- unsigned Opc;
- if (is64bit) {
- Imm = AArch64_AM::getFP64Imm(Val);
- Opc = AArch64::FMOVDi;
- } else {
- Imm = AArch64_AM::getFP32Imm(Val);
- Opc = AArch64::FMOVSi;
- }
+ int Imm = Is64Bit ? AArch64_AM::getFP64Imm(Val)
+ : AArch64_AM::getFP32Imm(Val);
+ unsigned Opc = Is64Bit ? AArch64::FMOVDi : AArch64::FMOVSi;
unsigned ResultReg = createResultReg(TLI.getRegClassFor(VT));
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg)
- .addImm(Imm);
+ .addImm(Imm);
return ResultReg;
}
if (Align == 0)
Align = DL.getTypeAllocSize(CFP->getType());
- unsigned Idx = MCP.getConstantPoolIndex(cast<Constant>(CFP), Align);
+ unsigned CPI = MCP.getConstantPoolIndex(cast<Constant>(CFP), Align);
unsigned ADRPReg = createResultReg(&AArch64::GPR64commonRegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP),
- ADRPReg).addConstantPoolIndex(Idx, 0, AArch64II::MO_PAGE);
+ ADRPReg)
+ .addConstantPoolIndex(CPI, 0, AArch64II::MO_PAGE);
- unsigned Opc = is64bit ? AArch64::LDRDui : AArch64::LDRSui;
+ unsigned Opc = Is64Bit ? AArch64::LDRDui : AArch64::LDRSui;
unsigned ResultReg = createResultReg(TLI.getRegClassFor(VT));
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg)
- .addReg(ADRPReg)
- .addConstantPoolIndex(Idx, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
+ .addReg(ADRPReg)
+ .addConstantPoolIndex(CPI, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
return ResultReg;
}
// ADRP + LDRX
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP),
ADRPReg)
- .addGlobalAddress(GV, 0, AArch64II::MO_GOT | AArch64II::MO_PAGE);
+ .addGlobalAddress(GV, 0, AArch64II::MO_GOT | AArch64II::MO_PAGE);
ResultReg = createResultReg(&AArch64::GPR64RegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::LDRXui),
ResultReg)
- .addReg(ADRPReg)
- .addGlobalAddress(GV, 0, AArch64II::MO_GOT | AArch64II::MO_PAGEOFF |
- AArch64II::MO_NC);
+ .addReg(ADRPReg)
+ .addGlobalAddress(GV, 0, AArch64II::MO_GOT | AArch64II::MO_PAGEOFF |
+ AArch64II::MO_NC);
} else {
// ADRP + ADDX
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP),
- ADRPReg).addGlobalAddress(GV, 0, AArch64II::MO_PAGE);
+ ADRPReg)
+ .addGlobalAddress(GV, 0, AArch64II::MO_PAGE);
ResultReg = createResultReg(&AArch64::GPR64spRegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri),
ResultReg)
- .addReg(ADRPReg)
- .addGlobalAddress(GV, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC)
- .addImm(0);
+ .addReg(ADRPReg)
+ .addGlobalAddress(GV, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC)
+ .addImm(0);
}
return ResultReg;
}
return 0;
MVT VT = CEVT.getSimpleVT();
- // FIXME: Handle ConstantInt.
- if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C))
+ if (const auto *CI = dyn_cast<ConstantInt>(C))
+ return AArch64MaterializeInt(CI, VT);
+ else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C))
return AArch64MaterializeFP(CFP, VT);
else if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
return AArch64MaterializeGV(GV);
}
// Computes the address to get to an object.
-bool AArch64FastISel::ComputeAddress(const Value *Obj, Address &Addr) {
+bool AArch64FastISel::ComputeAddress(const Value *Obj, Address &Addr, Type *Ty)
+{
const User *U = nullptr;
unsigned Opcode = Instruction::UserOp1;
if (const Instruction *I = dyn_cast<Instruction>(Obj)) {
break;
case Instruction::BitCast: {
// Look through bitcasts.
- return ComputeAddress(U->getOperand(0), Addr);
+ return ComputeAddress(U->getOperand(0), Addr, Ty);
}
case Instruction::IntToPtr: {
// Look past no-op inttoptrs.
if (TLI.getValueType(U->getOperand(0)->getType()) == TLI.getPointerTy())
- return ComputeAddress(U->getOperand(0), Addr);
+ return ComputeAddress(U->getOperand(0), Addr, Ty);
break;
}
case Instruction::PtrToInt: {
// Look past no-op ptrtoints.
if (TLI.getValueType(U->getType()) == TLI.getPointerTy())
- return ComputeAddress(U->getOperand(0), Addr);
+ return ComputeAddress(U->getOperand(0), Addr, Ty);
break;
}
case Instruction::GetElementPtr: {
// Try to grab the base operand now.
Addr.setOffset(TmpOffset);
- if (ComputeAddress(U->getOperand(0), Addr))
+ if (ComputeAddress(U->getOperand(0), Addr, Ty))
return true;
// We failed, restore everything and try the other options.
}
break;
}
- case Instruction::Add:
+ case Instruction::Add: {
// Adds of constants are common and easy enough.
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(U->getOperand(1))) {
+ const Value *LHS = U->getOperand(0);
+ const Value *RHS = U->getOperand(1);
+
+ if (isa<ConstantInt>(LHS))
+ std::swap(LHS, RHS);
+
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(RHS)) {
Addr.setOffset(Addr.getOffset() + (uint64_t)CI->getSExtValue());
- return ComputeAddress(U->getOperand(0), Addr);
+ return ComputeAddress(LHS, Addr, Ty);
+ }
+
+ Address Backup = Addr;
+ if (ComputeAddress(LHS, Addr, Ty) && ComputeAddress(RHS, Addr, Ty))
+ return true;
+ Addr = Backup;
+
+ break;
+ }
+ case Instruction::Shl:
+ if (Addr.getOffsetReg())
+ break;
+
+ if (const auto *CI = dyn_cast<ConstantInt>(U->getOperand(1))) {
+ unsigned Val = CI->getZExtValue();
+ if (Val < 1 || Val > 3)
+ break;
+
+ uint64_t NumBytes = 0;
+ if (Ty && Ty->isSized()) {
+ uint64_t NumBits = DL.getTypeSizeInBits(Ty);
+ NumBytes = NumBits / 8;
+ if (!isPowerOf2_64(NumBits))
+ NumBytes = 0;
+ }
+
+ if (NumBytes != (1U << Val))
+ break;
+
+ Addr.setShift(Val);
+ Addr.setExtendType(AArch64_AM::LSL);
+
+ if (const auto *I = dyn_cast<Instruction>(U->getOperand(0)))
+ if (FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB)
+ U = I;
+
+ if (const auto *ZE = dyn_cast<ZExtInst>(U))
+ if (ZE->getOperand(0)->getType()->isIntegerTy(32))
+ Addr.setExtendType(AArch64_AM::UXTW);
+
+ if (const auto *SE = dyn_cast<SExtInst>(U))
+ if (SE->getOperand(0)->getType()->isIntegerTy(32))
+ Addr.setExtendType(AArch64_AM::SXTW);
+
+ unsigned Reg = getRegForValue(U->getOperand(0));
+ if (!Reg)
+ return false;
+ Addr.setOffsetReg(Reg);
+ return true;
}
break;
}
- // Try to get this in a register if nothing else has worked.
- if (!Addr.isValid())
- Addr.setReg(getRegForValue(Obj));
- return Addr.isValid();
+ if (Addr.getReg()) {
+ if (!Addr.getOffsetReg()) {
+ unsigned Reg = getRegForValue(Obj);
+ if (!Reg)
+ return false;
+ Addr.setOffsetReg(Reg);
+ return true;
+ }
+ return false;
+ }
+
+ unsigned Reg = getRegForValue(Obj);
+ if (!Reg)
+ return false;
+ Addr.setReg(Reg);
+ return true;
}
bool AArch64FastISel::ComputeCallAddress(const Value *V, Address &Addr) {
return false;
}
-bool AArch64FastISel::SimplifyAddress(Address &Addr, MVT VT,
- int64_t ScaleFactor, bool UseUnscaled) {
- bool needsLowering = false;
- int64_t Offset = Addr.getOffset();
+bool AArch64FastISel::SimplifyAddress(Address &Addr, MVT VT) {
+ unsigned ScaleFactor;
switch (VT.SimpleTy) {
- default:
- return false;
- case MVT::i1:
- case MVT::i8:
- case MVT::i16:
- case MVT::i32:
- case MVT::i64:
- case MVT::f32:
- case MVT::f64:
- if (!UseUnscaled)
- // Using scaled, 12-bit, unsigned immediate offsets.
- needsLowering = ((Offset & 0xfff) != Offset);
- else
- // Using unscaled, 9-bit, signed immediate offsets.
- needsLowering = (Offset > 256 || Offset < -256);
- break;
+ default: return false;
+ case MVT::i1: // fall-through
+ case MVT::i8: ScaleFactor = 1; break;
+ case MVT::i16: ScaleFactor = 2; break;
+ case MVT::i32: // fall-through
+ case MVT::f32: ScaleFactor = 4; break;
+ case MVT::i64: // fall-through
+ case MVT::f64: ScaleFactor = 8; break;
}
- //If this is a stack pointer and the offset needs to be simplified then put
+ bool ImmediateOffsetNeedsLowering = false;
+ bool RegisterOffsetNeedsLowering = false;
+ int64_t Offset = Addr.getOffset();
+ if (((Offset < 0) || (Offset & (ScaleFactor - 1))) && !isInt<9>(Offset))
+ ImmediateOffsetNeedsLowering = true;
+ else if (Offset > 0 && !(Offset & (ScaleFactor - 1)) &&
+ !isUInt<12>(Offset / ScaleFactor))
+ ImmediateOffsetNeedsLowering = true;
+
+ // Cannot encode an offset register and an immediate offset in the same
+ // instruction. Fold the immediate offset into the load/store instruction and
+ // emit an additonal add to take care of the offset register.
+ if (!ImmediateOffsetNeedsLowering && Addr.getOffset() && Addr.isRegBase() &&
+ Addr.getOffsetReg())
+ RegisterOffsetNeedsLowering = true;
+
+ // If this is a stack pointer and the offset needs to be simplified then put
// the alloca address into a register, set the base type back to register and
// continue. This should almost never happen.
- if (needsLowering && Addr.getKind() == Address::FrameIndexBase) {
+ if (ImmediateOffsetNeedsLowering && Addr.isFIBase()) {
unsigned ResultReg = createResultReg(&AArch64::GPR64RegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri),
ResultReg)
- .addFrameIndex(Addr.getFI())
- .addImm(0)
- .addImm(0);
+ .addFrameIndex(Addr.getFI())
+ .addImm(0)
+ .addImm(0);
Addr.setKind(Address::RegBase);
Addr.setReg(ResultReg);
}
+ if (RegisterOffsetNeedsLowering) {
+ unsigned ResultReg = 0;
+ if (Addr.getReg()) {
+ ResultReg = createResultReg(&AArch64::GPR64RegClass);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(AArch64::ADDXrs), ResultReg)
+ .addReg(Addr.getReg())
+ .addReg(Addr.getOffsetReg())
+ .addImm(Addr.getShift());
+ } else
+ ResultReg = Emit_LSL_ri(MVT::i64, Addr.getOffsetReg(),
+ /*Op0IsKill=*/false, Addr.getShift());
+ if (!ResultReg)
+ return false;
+
+ Addr.setReg(ResultReg);
+ Addr.setOffsetReg(0);
+ Addr.setShift(0);
+ }
+
// Since the offset is too large for the load/store instruction get the
// reg+offset into a register.
- if (needsLowering) {
- uint64_t UnscaledOffset = Addr.getOffset() * ScaleFactor;
- unsigned ResultReg = FastEmit_ri_(MVT::i64, ISD::ADD, Addr.getReg(), false,
- UnscaledOffset, MVT::i64);
- if (ResultReg == 0)
+ if (ImmediateOffsetNeedsLowering) {
+ unsigned ResultReg = 0;
+ if (Addr.getReg())
+ ResultReg = FastEmit_ri_(MVT::i64, ISD::ADD, Addr.getReg(),
+ /*IsKill=*/false, Offset, MVT::i64);
+ else
+ ResultReg = FastEmit_i(MVT::i64, MVT::i64, ISD::Constant, Offset);
+
+ if (!ResultReg)
return false;
Addr.setReg(ResultReg);
Addr.setOffset(0);
void AArch64FastISel::AddLoadStoreOperands(Address &Addr,
const MachineInstrBuilder &MIB,
unsigned Flags,
- MachineMemOperand *MMO,
- bool UseUnscaled) {
- int64_t Offset = Addr.getOffset();
+ unsigned ScaleFactor,
+ MachineMemOperand *MMO) {
+ int64_t Offset = Addr.getOffset() / ScaleFactor;
// Frame base works a bit differently. Handle it separately.
- if (Addr.getKind() == Address::FrameIndexBase) {
+ if (Addr.isFIBase()) {
int FI = Addr.getFI();
// FIXME: We shouldn't be using getObjectSize/getObjectAlignment. The size
// and alignment should be based on the VT.
// Now add the rest of the operands.
MIB.addFrameIndex(FI).addImm(Offset);
} else {
- // Now add the rest of the operands.
- MIB.addReg(Addr.getReg());
- MIB.addImm(Offset);
+ assert(Addr.isRegBase() && "Unexpected address kind.");
+ if (Addr.getOffsetReg()) {
+ assert(Addr.getOffset() == 0 && "Unexpected offset");
+ bool IsSigned = Addr.getExtendType() == AArch64_AM::SXTW ||
+ Addr.getExtendType() == AArch64_AM::SXTX;
+ MIB.addReg(Addr.getReg());
+ MIB.addReg(Addr.getOffsetReg());
+ MIB.addImm(IsSigned);
+ MIB.addImm(Addr.getShift() != 0);
+ } else {
+ MIB.addReg(Addr.getReg());
+ MIB.addImm(Offset);
+ }
}
if (MMO)
}
bool AArch64FastISel::EmitLoad(MVT VT, unsigned &ResultReg, Address Addr,
- MachineMemOperand *MMO, bool UseUnscaled) {
+ MachineMemOperand *MMO) {
+ // Simplify this down to something we can handle.
+ if (!SimplifyAddress(Addr, VT))
+ return false;
+
+ unsigned ScaleFactor;
+ switch (VT.SimpleTy) {
+ default: llvm_unreachable("Unexpected value type.");
+ case MVT::i1: // fall-through
+ case MVT::i8: ScaleFactor = 1; break;
+ case MVT::i16: ScaleFactor = 2; break;
+ case MVT::i32: // fall-through
+ case MVT::f32: ScaleFactor = 4; break;
+ case MVT::i64: // fall-through
+ case MVT::f64: ScaleFactor = 8; break;
+ }
+
// Negative offsets require unscaled, 9-bit, signed immediate offsets.
// Otherwise, we try using scaled, 12-bit, unsigned immediate offsets.
- if (!UseUnscaled && Addr.getOffset() < 0)
- UseUnscaled = true;
+ bool UseScaled = true;
+ if ((Addr.getOffset() < 0) || (Addr.getOffset() & (ScaleFactor - 1))) {
+ UseScaled = false;
+ ScaleFactor = 1;
+ }
+
+ static const unsigned OpcTable[4][6] = {
+ { AArch64::LDURBBi, AArch64::LDURHHi, AArch64::LDURWi, AArch64::LDURXi,
+ AArch64::LDURSi, AArch64::LDURDi },
+ { AArch64::LDRBBui, AArch64::LDRHHui, AArch64::LDRWui, AArch64::LDRXui,
+ AArch64::LDRSui, AArch64::LDRDui },
+ { AArch64::LDRBBroX, AArch64::LDRHHroX, AArch64::LDRWroX, AArch64::LDRXroX,
+ AArch64::LDRSroX, AArch64::LDRDroX },
+ { AArch64::LDRBBroW, AArch64::LDRHHroW, AArch64::LDRWroW, AArch64::LDRXroW,
+ AArch64::LDRSroW, AArch64::LDRDroW }
+ };
unsigned Opc;
const TargetRegisterClass *RC;
bool VTIsi1 = false;
- int64_t ScaleFactor = 0;
- switch (VT.SimpleTy) {
- default:
- return false;
- case MVT::i1:
- VTIsi1 = true;
- // Intentional fall-through.
- case MVT::i8:
- Opc = UseUnscaled ? AArch64::LDURBBi : AArch64::LDRBBui;
- RC = &AArch64::GPR32RegClass;
- ScaleFactor = 1;
- break;
- case MVT::i16:
- Opc = UseUnscaled ? AArch64::LDURHHi : AArch64::LDRHHui;
- RC = &AArch64::GPR32RegClass;
- ScaleFactor = 2;
- break;
- case MVT::i32:
- Opc = UseUnscaled ? AArch64::LDURWi : AArch64::LDRWui;
- RC = &AArch64::GPR32RegClass;
- ScaleFactor = 4;
- break;
- case MVT::i64:
- Opc = UseUnscaled ? AArch64::LDURXi : AArch64::LDRXui;
- RC = &AArch64::GPR64RegClass;
- ScaleFactor = 8;
- break;
- case MVT::f32:
- Opc = UseUnscaled ? AArch64::LDURSi : AArch64::LDRSui;
- RC = TLI.getRegClassFor(VT);
- ScaleFactor = 4;
- break;
- case MVT::f64:
- Opc = UseUnscaled ? AArch64::LDURDi : AArch64::LDRDui;
- RC = TLI.getRegClassFor(VT);
- ScaleFactor = 8;
- break;
- }
- // Scale the offset.
- if (!UseUnscaled) {
- int64_t Offset = Addr.getOffset();
- if (Offset & (ScaleFactor - 1))
- // Retry using an unscaled, 9-bit, signed immediate offset.
- return EmitLoad(VT, ResultReg, Addr, MMO, /*UseUnscaled*/ true);
+ bool UseRegOffset = Addr.isRegBase() && !Addr.getOffset() && Addr.getReg() &&
+ Addr.getOffsetReg();
+ unsigned Idx = UseRegOffset ? 2 : UseScaled ? 1 : 0;
+ if (Addr.getExtendType() == AArch64_AM::UXTW ||
+ Addr.getExtendType() == AArch64_AM::SXTW)
+ Idx++;
- Addr.setOffset(Offset / ScaleFactor);
+ switch (VT.SimpleTy) {
+ default: llvm_unreachable("Unexpected value type.");
+ case MVT::i1: VTIsi1 = true; // Intentional fall-through.
+ case MVT::i8: Opc = OpcTable[Idx][0]; RC = &AArch64::GPR32RegClass; break;
+ case MVT::i16: Opc = OpcTable[Idx][1]; RC = &AArch64::GPR32RegClass; break;
+ case MVT::i32: Opc = OpcTable[Idx][2]; RC = &AArch64::GPR32RegClass; break;
+ case MVT::i64: Opc = OpcTable[Idx][3]; RC = &AArch64::GPR64RegClass; break;
+ case MVT::f32: Opc = OpcTable[Idx][4]; RC = &AArch64::FPR32RegClass; break;
+ case MVT::f64: Opc = OpcTable[Idx][5]; RC = &AArch64::FPR64RegClass; break;
}
- // Simplify this down to something we can handle.
- if (!SimplifyAddress(Addr, VT, UseUnscaled ? 1 : ScaleFactor, UseUnscaled))
- return false;
-
// Create the base instruction, then add the operands.
ResultReg = createResultReg(RC);
MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
TII.get(Opc), ResultReg);
- AddLoadStoreOperands(Addr, MIB, MachineMemOperand::MOLoad, MMO, UseUnscaled);
+ AddLoadStoreOperands(Addr, MIB, MachineMemOperand::MOLoad, ScaleFactor, MMO);
// Loading an i1 requires special handling.
if (VTIsi1) {
unsigned ANDReg = createResultReg(&AArch64::GPR32spRegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ANDWri),
ANDReg)
- .addReg(ResultReg)
- .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
+ .addReg(ResultReg)
+ .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
ResultReg = ANDReg;
}
return true;
// See if we can handle this address.
Address Addr;
- if (!ComputeAddress(I->getOperand(0), Addr))
+ if (!ComputeAddress(I->getOperand(0), Addr, I->getType()))
return false;
unsigned ResultReg;
}
bool AArch64FastISel::EmitStore(MVT VT, unsigned SrcReg, Address Addr,
- MachineMemOperand *MMO, bool UseUnscaled) {
- // Negative offsets require unscaled, 9-bit, signed immediate offsets.
- // Otherwise, we try using scaled, 12-bit, unsigned immediate offsets.
- if (!UseUnscaled && Addr.getOffset() < 0)
- UseUnscaled = true;
+ MachineMemOperand *MMO) {
+ // Simplify this down to something we can handle.
+ if (!SimplifyAddress(Addr, VT))
+ return false;
- unsigned StrOpc;
- bool VTIsi1 = false;
- int64_t ScaleFactor = 0;
- // Using scaled, 12-bit, unsigned immediate offsets.
+ unsigned ScaleFactor;
switch (VT.SimpleTy) {
- default:
- return false;
- case MVT::i1:
- VTIsi1 = true;
- case MVT::i8:
- StrOpc = UseUnscaled ? AArch64::STURBBi : AArch64::STRBBui;
- ScaleFactor = 1;
- break;
- case MVT::i16:
- StrOpc = UseUnscaled ? AArch64::STURHHi : AArch64::STRHHui;
- ScaleFactor = 2;
- break;
- case MVT::i32:
- StrOpc = UseUnscaled ? AArch64::STURWi : AArch64::STRWui;
- ScaleFactor = 4;
- break;
- case MVT::i64:
- StrOpc = UseUnscaled ? AArch64::STURXi : AArch64::STRXui;
- ScaleFactor = 8;
- break;
- case MVT::f32:
- StrOpc = UseUnscaled ? AArch64::STURSi : AArch64::STRSui;
- ScaleFactor = 4;
- break;
- case MVT::f64:
- StrOpc = UseUnscaled ? AArch64::STURDi : AArch64::STRDui;
- ScaleFactor = 8;
- break;
+ default: llvm_unreachable("Unexpected value type.");
+ case MVT::i1: // fall-through
+ case MVT::i8: ScaleFactor = 1; break;
+ case MVT::i16: ScaleFactor = 2; break;
+ case MVT::i32: // fall-through
+ case MVT::f32: ScaleFactor = 4; break;
+ case MVT::i64: // fall-through
+ case MVT::f64: ScaleFactor = 8; break;
}
- // Scale the offset.
- if (!UseUnscaled) {
- int64_t Offset = Addr.getOffset();
- if (Offset & (ScaleFactor - 1))
- // Retry using an unscaled, 9-bit, signed immediate offset.
- return EmitStore(VT, SrcReg, Addr, MMO, /*UseUnscaled*/ true);
- Addr.setOffset(Offset / ScaleFactor);
+ // Negative offsets require unscaled, 9-bit, signed immediate offsets.
+ // Otherwise, we try using scaled, 12-bit, unsigned immediate offsets.
+ bool UseScaled = true;
+ if ((Addr.getOffset() < 0) || (Addr.getOffset() & (ScaleFactor - 1))) {
+ UseScaled = false;
+ ScaleFactor = 1;
}
- // Simplify this down to something we can handle.
- if (!SimplifyAddress(Addr, VT, UseUnscaled ? 1 : ScaleFactor, UseUnscaled))
- return false;
+
+ static const unsigned OpcTable[4][6] = {
+ { AArch64::STURBBi, AArch64::STURHHi, AArch64::STURWi, AArch64::STURXi,
+ AArch64::STURSi, AArch64::STURDi },
+ { AArch64::STRBBui, AArch64::STRHHui, AArch64::STRWui, AArch64::STRXui,
+ AArch64::STRSui, AArch64::STRDui },
+ { AArch64::STRBBroX, AArch64::STRHHroX, AArch64::STRWroX, AArch64::STRXroX,
+ AArch64::STRSroX, AArch64::STRDroX },
+ { AArch64::STRBBroW, AArch64::STRHHroW, AArch64::STRWroW, AArch64::STRXroW,
+ AArch64::STRSroW, AArch64::STRDroW }
+
+ };
+
+ unsigned Opc;
+ bool VTIsi1 = false;
+ bool UseRegOffset = Addr.isRegBase() && !Addr.getOffset() && Addr.getReg() &&
+ Addr.getOffsetReg();
+ unsigned Idx = UseRegOffset ? 2 : UseScaled ? 1 : 0;
+ if (Addr.getExtendType() == AArch64_AM::UXTW ||
+ Addr.getExtendType() == AArch64_AM::SXTW)
+ Idx++;
+
+ switch (VT.SimpleTy) {
+ default: llvm_unreachable("Unexpected value type.");
+ case MVT::i1: VTIsi1 = true;
+ case MVT::i8: Opc = OpcTable[Idx][0]; break;
+ case MVT::i16: Opc = OpcTable[Idx][1]; break;
+ case MVT::i32: Opc = OpcTable[Idx][2]; break;
+ case MVT::i64: Opc = OpcTable[Idx][3]; break;
+ case MVT::f32: Opc = OpcTable[Idx][4]; break;
+ case MVT::f64: Opc = OpcTable[Idx][5]; break;
+ }
// Storing an i1 requires special handling.
if (VTIsi1) {
unsigned ANDReg = createResultReg(&AArch64::GPR32spRegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ANDWri),
ANDReg)
- .addReg(SrcReg)
- .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
+ .addReg(SrcReg)
+ .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
SrcReg = ANDReg;
}
// Create the base instruction, then add the operands.
MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(StrOpc)).addReg(SrcReg);
- AddLoadStoreOperands(Addr, MIB, MachineMemOperand::MOStore, MMO, UseUnscaled);
+ TII.get(Opc))
+ .addReg(SrcReg);
+ AddLoadStoreOperands(Addr, MIB, MachineMemOperand::MOStore, ScaleFactor, MMO);
return true;
}
// See if we can handle this address.
Address Addr;
- if (!ComputeAddress(I->getOperand(1), Addr))
+ if (!ComputeAddress(I->getOperand(1), Addr, I->getOperand(0)->getType()))
return false;
if (!EmitStore(VT, SrcReg, Addr, createMachineMemOperandFor(I)))
bool AArch64FastISel::FastLowerCall(CallLoweringInfo &CLI) {
CallingConv::ID CC = CLI.CallConv;
+ bool IsTailCall = CLI.IsTailCall;
bool IsVarArg = CLI.IsVarArg;
const Value *Callee = CLI.Callee;
const char *SymName = CLI.SymName;
+ // Allow SelectionDAG isel to handle tail calls.
+ if (IsTailCall)
+ return false;
+
CodeModel::Model CM = TM.getCodeModel();
// Only support the small and large code model.
if (CM != CodeModel::Small && CM != CodeModel::Large)
projects / oota-llvm.git / blobdiff