const AArch64Subtarget *Subtarget;
LLVMContext *Context;
- bool FastLowerArguments() override;
- bool FastLowerCall(CallLoweringInfo &CLI) override;
- bool FastLowerIntrinsicCall(const IntrinsicInst *II) override;
+ bool fastLowerArguments() override;
+ bool fastLowerCall(CallLoweringInfo &CLI) override;
+ bool fastLowerIntrinsicCall(const IntrinsicInst *II) override;
private:
// Selection routines.
+ bool selectAddSub(const Instruction *I);
+ bool selectLogicalOp(const Instruction *I);
bool SelectLoad(const Instruction *I);
bool SelectStore(const Instruction *I);
bool SelectBranch(const Instruction *I);
bool SelectTrunc(const Instruction *I);
bool SelectIntExt(const Instruction *I);
bool SelectMul(const Instruction *I);
- bool SelectShift(const Instruction *I, bool IsLeftShift, bool IsArithmetic);
+ bool SelectShift(const Instruction *I);
bool SelectBitCast(const Instruction *I);
// Utility helper routines.
bool isTypeLegal(Type *Ty, MVT &VT);
bool isLoadStoreTypeLegal(Type *Ty, MVT &VT);
+ bool isTypeSupported(Type *Ty, MVT &VT);
+ bool isValueAvailable(const Value *V) const;
bool ComputeAddress(const Value *Obj, Address &Addr, Type *Ty = nullptr);
bool ComputeCallAddress(const Value *V, Address &Addr);
bool SimplifyAddress(Address &Addr, MVT VT);
bool foldXALUIntrinsic(AArch64CC::CondCode &CC, const Instruction *I,
const Value *Cond);
+ // Emit helper routines.
+ unsigned emitAddSub(bool UseAdd, MVT RetVT, const Value *LHS,
+ const Value *RHS, bool SetFlags = false,
+ bool WantResult = true, bool IsZExt = false);
+ unsigned emitAddSub_rr(bool UseAdd, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg, bool RHSIsKill,
+ bool SetFlags = false, bool WantResult = true);
+ unsigned emitAddSub_ri(bool UseAdd, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, uint64_t Imm, bool SetFlags = false,
+ bool WantResult = true);
+ unsigned emitAddSub_rs(bool UseAdd, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg, bool RHSIsKill,
+ AArch64_AM::ShiftExtendType ShiftType,
+ uint64_t ShiftImm, bool SetFlags = false,
+ bool WantResult = true);
+ unsigned emitAddSub_rx(bool UseAdd, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg, bool RHSIsKill,
+ AArch64_AM::ShiftExtendType ExtType,
+ uint64_t ShiftImm, bool SetFlags = false,
+ bool WantResult = true);
+
// Emit functions.
- bool EmitCmp(Value *Src1Value, Value *Src2Value, bool isZExt);
+ bool emitCmp(const Value *LHS, const Value *RHS, bool IsZExt);
+ bool emitICmp(MVT RetVT, const Value *LHS, const Value *RHS, bool IsZExt);
+ bool emitICmp_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill, uint64_t Imm);
+ bool emitFCmp(MVT RetVT, const Value *LHS, const Value *RHS);
bool EmitLoad(MVT VT, unsigned &ResultReg, Address Addr,
MachineMemOperand *MMO = nullptr);
bool EmitStore(MVT VT, unsigned SrcReg, Address Addr,
MachineMemOperand *MMO = nullptr);
unsigned EmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT, bool isZExt);
unsigned Emiti1Ext(unsigned SrcReg, MVT DestVT, bool isZExt);
+ unsigned emitAdd(MVT RetVT, const Value *LHS, const Value *RHS,
+ bool SetFlags = false, bool WantResult = true,
+ bool IsZExt = false);
+ unsigned emitSub(MVT RetVT, const Value *LHS, const Value *RHS,
+ bool SetFlags = false, bool WantResult = true,
+ bool IsZExt = false);
+ unsigned emitSubs_rr(MVT RetVT, unsigned LHSReg, bool LHSIsKill,
+ unsigned RHSReg, bool RHSIsKill, bool WantResult = true);
+ unsigned emitSubs_rs(MVT RetVT, unsigned LHSReg, bool LHSIsKill,
+ unsigned RHSReg, bool RHSIsKill,
+ AArch64_AM::ShiftExtendType ShiftType, uint64_t ShiftImm,
+ bool WantResult = true);
+ unsigned emitLogicalOp(unsigned ISDOpc, MVT RetVT, const Value *LHS,
+ const Value *RHS);
+ unsigned emitLogicalOp_ri(unsigned ISDOpc, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, uint64_t Imm);
+ unsigned emitLogicalOp_rs(unsigned ISDOpc, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg, bool RHSIsKill,
+ uint64_t ShiftImm);
+ unsigned emitAnd_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill, uint64_t Imm);
unsigned Emit_MUL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
unsigned Op1, bool Op1IsKill);
unsigned Emit_SMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
unsigned Op1, bool Op1IsKill);
unsigned Emit_UMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
unsigned Op1, bool Op1IsKill);
- unsigned Emit_LSL_ri(MVT RetVT, unsigned Op0, bool Op0IsKill, uint64_t Imm);
- 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 emitLSL_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
+ unsigned Op1Reg, bool Op1IsKill);
+ unsigned emitLSL_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill,
+ uint64_t Imm, bool IsZExt = true);
+ unsigned emitLSR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
+ unsigned Op1Reg, bool Op1IsKill);
+ unsigned emitLSR_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill,
+ uint64_t Imm, bool IsZExt = true);
+ unsigned emitASR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
+ unsigned Op1Reg, bool Op1IsKill);
+ unsigned emitASR_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill,
+ uint64_t Imm, bool IsZExt = false);
unsigned AArch64MaterializeInt(const ConstantInt *CI, MVT VT);
unsigned AArch64MaterializeFP(const ConstantFP *CFP, MVT VT);
public:
// Backend specific FastISel code.
- unsigned TargetMaterializeAlloca(const AllocaInst *AI) override;
- unsigned TargetMaterializeConstant(const Constant *C) override;
+ unsigned fastMaterializeAlloca(const AllocaInst *AI) override;
+ unsigned fastMaterializeConstant(const Constant *C) override;
+ unsigned fastMaterializeFloatZero(const ConstantFP* CF) override;
- explicit AArch64FastISel(FunctionLoweringInfo &funcInfo,
- const TargetLibraryInfo *libInfo)
- : FastISel(funcInfo, libInfo) {
+ explicit AArch64FastISel(FunctionLoweringInfo &FuncInfo,
+ const TargetLibraryInfo *LibInfo)
+ : FastISel(FuncInfo, LibInfo, /*SkipTargetIndependentISel=*/true) {
Subtarget = &TM.getSubtarget<AArch64Subtarget>();
- Context = &funcInfo.Fn->getContext();
+ Context = &FuncInfo.Fn->getContext();
}
- bool TargetSelectInstruction(const Instruction *I) override;
+ bool fastSelectInstruction(const Instruction *I) override;
#include "AArch64GenFastISel.inc"
};
return Subtarget->isTargetDarwin() ? CC_AArch64_DarwinPCS : CC_AArch64_AAPCS;
}
-unsigned AArch64FastISel::TargetMaterializeAlloca(const AllocaInst *AI) {
+unsigned AArch64FastISel::fastMaterializeAlloca(const AllocaInst *AI) {
assert(TLI.getValueType(AI->getType(), true) == MVT::i64 &&
"Alloca should always return a pointer.");
FuncInfo.StaticAllocaMap.find(AI);
if (SI != FuncInfo.StaticAllocaMap.end()) {
- unsigned ResultReg = createResultReg(&AArch64::GPR64RegClass);
+ unsigned ResultReg = createResultReg(&AArch64::GPR64spRegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri),
ResultReg)
.addFrameIndex(SI->second)
return 0;
if (!CI->isZero())
- return FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue());
+ 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));
+ 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) {
+ // Positive zero (+0.0) has to be materialized with a fmov from the zero
+ // register, because the immediate version of fmov cannot encode zero.
+ if (CFP->isNullValue())
+ return fastMaterializeFloatZero(CFP);
+
if (VT != MVT::f32 && VT != MVT::f64)
return 0;
const APFloat Val = CFP->getValueAPF();
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 = Is64Bit ? AArch64_AM::getFP64Imm(Val)
- : AArch64_AM::getFP32Imm(Val);
+ int Imm =
+ Is64Bit ? AArch64_AM::getFP64Imm(Val) : AArch64_AM::getFP32Imm(Val);
+ assert((Imm != -1) && "Cannot encode floating-point constant.");
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);
- return ResultReg;
+ return fastEmitInst_i(Opc, TLI.getRegClassFor(VT), Imm);
}
// Materialize via constant pool. MachineConstantPool wants an explicit
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(CPI, 0, AArch64II::MO_PAGE);
+ ADRPReg).addConstantPoolIndex(CPI, 0, AArch64II::MO_PAGE);
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(CPI, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
+ .addReg(ADRPReg)
+ .addConstantPoolIndex(CPI, 0, AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
return ResultReg;
}
return ResultReg;
}
-unsigned AArch64FastISel::TargetMaterializeConstant(const Constant *C) {
+unsigned AArch64FastISel::fastMaterializeConstant(const Constant *C) {
EVT CEVT = TLI.getValueType(C->getType(), true);
// Only handle simple types.
return 0;
}
+unsigned AArch64FastISel::fastMaterializeFloatZero(const ConstantFP* CFP) {
+ assert(CFP->isNullValue() &&
+ "Floating-point constant is not a positive zero.");
+ MVT VT;
+ if (!isTypeLegal(CFP->getType(), VT))
+ return 0;
+
+ if (VT != MVT::f32 && VT != MVT::f64)
+ return 0;
+
+ bool Is64Bit = (VT == MVT::f64);
+ unsigned ZReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
+ unsigned Opc = Is64Bit ? AArch64::FMOVXDr : AArch64::FMOVWSr;
+ return fastEmitInst_r(Opc, TLI.getRegClassFor(VT), ZReg, /*IsKill=*/true);
+}
+
// Computes the address to get to an object.
bool AArch64FastISel::ComputeAddress(const Value *Obj, Address &Addr, Type *Ty)
{
NumBytes = 0;
}
- if (NumBytes != (1U << Val))
+ if (NumBytes != (1ULL << Val))
break;
Addr.setShift(Val);
return false;
}
+/// \brief Determine if the value type is supported by FastISel.
+///
+/// FastISel for AArch64 can handle more value types than are legal. This adds
+/// simple value type such as i1, i8, and i16.
+/// Vectors on the other side are not supported yet.
+bool AArch64FastISel::isTypeSupported(Type *Ty, MVT &VT) {
+ if (Ty->isVectorTy())
+ return false;
+
+ if (isTypeLegal(Ty, VT))
+ return true;
+
+ // If this is a type than can be sign or zero-extended to a basic operation
+ // go ahead and accept it now.
+ if (VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16)
+ return true;
+
+ return false;
+}
+
+bool AArch64FastISel::isValueAvailable(const Value *V) const {
+ if (!isa<Instruction>(V))
+ return true;
+
+ const auto *I = cast<Instruction>(V);
+ if (FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB)
+ return true;
+
+ return false;
+}
+
bool AArch64FastISel::SimplifyAddress(Address &Addr, MVT VT) {
unsigned ScaleFactor;
switch (VT.SimpleTy) {
Addr.getOffsetReg())
RegisterOffsetNeedsLowering = true;
+ // Cannot encode zero register as base.
+ if (Addr.isRegBase() && Addr.getOffsetReg() && !Addr.getReg())
+ 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 (ImmediateOffsetNeedsLowering && Addr.isFIBase()) {
- unsigned ResultReg = createResultReg(&AArch64::GPR64RegClass);
+ unsigned ResultReg = createResultReg(&AArch64::GPR64spRegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri),
ResultReg)
.addFrameIndex(Addr.getFI())
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 (Addr.getExtendType() == AArch64_AM::SXTW ||
+ Addr.getExtendType() == AArch64_AM::UXTW )
+ ResultReg = emitAddSub_rx(/*UseAdd=*/true, MVT::i64, Addr.getReg(),
+ /*TODO:IsKill=*/false, Addr.getOffsetReg(),
+ /*TODO:IsKill=*/false, Addr.getExtendType(),
+ Addr.getShift());
+ else
+ ResultReg = emitAddSub_rs(/*UseAdd=*/true, MVT::i64, Addr.getReg(),
+ /*TODO:IsKill=*/false, Addr.getOffsetReg(),
+ /*TODO:IsKill=*/false, AArch64_AM::LSL,
+ Addr.getShift());
+ } else {
+ if (Addr.getExtendType() == AArch64_AM::UXTW)
+ ResultReg = emitLSL_ri(MVT::i64, MVT::i32, Addr.getOffsetReg(),
+ /*Op0IsKill=*/false, Addr.getShift(),
+ /*IsZExt=*/true);
+ else if (Addr.getExtendType() == AArch64_AM::SXTW)
+ ResultReg = emitLSL_ri(MVT::i64, MVT::i32, Addr.getOffsetReg(),
+ /*Op0IsKill=*/false, Addr.getShift(),
+ /*IsZExt=*/false);
+ else
+ ResultReg = emitLSL_ri(MVT::i64, MVT::i64, Addr.getOffsetReg(),
+ /*Op0IsKill=*/false, Addr.getShift());
+ }
if (!ResultReg)
return false;
Addr.setReg(ResultReg);
Addr.setOffsetReg(0);
Addr.setShift(0);
+ Addr.setExtendType(AArch64_AM::InvalidShiftExtend);
}
// Since the offset is too large for the load/store instruction get the
if (ImmediateOffsetNeedsLowering) {
unsigned ResultReg = 0;
if (Addr.getReg())
- ResultReg = FastEmit_ri_(MVT::i64, ISD::ADD, 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);
+ ResultReg = fastEmit_i(MVT::i64, MVT::i64, ISD::Constant, Offset);
if (!ResultReg)
return false;
MIB.addFrameIndex(FI).addImm(Offset);
} else {
assert(Addr.isRegBase() && "Unexpected address kind.");
+ const MCInstrDesc &II = MIB->getDesc();
+ unsigned Idx = (Flags & MachineMemOperand::MOStore) ? 1 : 0;
+ Addr.setReg(
+ constrainOperandRegClass(II, Addr.getReg(), II.getNumDefs()+Idx));
+ Addr.setOffsetReg(
+ constrainOperandRegClass(II, Addr.getOffsetReg(), II.getNumDefs()+Idx+1));
if (Addr.getOffsetReg()) {
assert(Addr.getOffset() == 0 && "Unexpected offset");
bool IsSigned = Addr.getExtendType() == AArch64_AM::SXTW ||
MIB.addMemOperand(MMO);
}
+unsigned AArch64FastISel::emitAddSub(bool UseAdd, MVT RetVT, const Value *LHS,
+ const Value *RHS, bool SetFlags,
+ bool WantResult, bool IsZExt) {
+ AArch64_AM::ShiftExtendType ExtendType = AArch64_AM::InvalidShiftExtend;
+ bool NeedExtend = false;
+ switch (RetVT.SimpleTy) {
+ default:
+ return 0;
+ case MVT::i1:
+ NeedExtend = true;
+ break;
+ case MVT::i8:
+ NeedExtend = true;
+ ExtendType = IsZExt ? AArch64_AM::UXTB : AArch64_AM::SXTB;
+ break;
+ case MVT::i16:
+ NeedExtend = true;
+ ExtendType = IsZExt ? AArch64_AM::UXTH : AArch64_AM::SXTH;
+ break;
+ case MVT::i32: // fall-through
+ case MVT::i64:
+ break;
+ }
+ MVT SrcVT = RetVT;
+ RetVT.SimpleTy = std::max(RetVT.SimpleTy, MVT::i32);
+
+ // Canonicalize immediates to the RHS first.
+ if (UseAdd && isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS))
+ std::swap(LHS, RHS);
+
+ // Canonicalize shift immediate to the RHS.
+ if (UseAdd && isValueAvailable(LHS))
+ if (const auto *SI = dyn_cast<BinaryOperator>(LHS))
+ if (isa<ConstantInt>(SI->getOperand(1)))
+ if (SI->getOpcode() == Instruction::Shl ||
+ SI->getOpcode() == Instruction::LShr ||
+ SI->getOpcode() == Instruction::AShr )
+ std::swap(LHS, RHS);
+
+ unsigned LHSReg = getRegForValue(LHS);
+ if (!LHSReg)
+ return 0;
+ bool LHSIsKill = hasTrivialKill(LHS);
+
+ if (NeedExtend)
+ LHSReg = EmitIntExt(SrcVT, LHSReg, RetVT, IsZExt);
+
+ unsigned ResultReg = 0;
+ if (const auto *C = dyn_cast<ConstantInt>(RHS)) {
+ uint64_t Imm = IsZExt ? C->getZExtValue() : C->getSExtValue();
+ if (C->isNegative())
+ ResultReg = emitAddSub_ri(!UseAdd, RetVT, LHSReg, LHSIsKill, -Imm,
+ SetFlags, WantResult);
+ else
+ ResultReg = emitAddSub_ri(UseAdd, RetVT, LHSReg, LHSIsKill, Imm, SetFlags,
+ WantResult);
+ }
+ if (ResultReg)
+ return ResultReg;
+
+ // Only extend the RHS within the instruction if there is a valid extend type.
+ if (ExtendType != AArch64_AM::InvalidShiftExtend && isValueAvailable(RHS)) {
+ if (const auto *SI = dyn_cast<BinaryOperator>(RHS))
+ if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1)))
+ if ((SI->getOpcode() == Instruction::Shl) && (C->getZExtValue() < 4)) {
+ unsigned RHSReg = getRegForValue(SI->getOperand(0));
+ if (!RHSReg)
+ return 0;
+ bool RHSIsKill = hasTrivialKill(SI->getOperand(0));
+ return emitAddSub_rx(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg,
+ RHSIsKill, ExtendType, C->getZExtValue(),
+ SetFlags, WantResult);
+ }
+ unsigned RHSReg = getRegForValue(RHS);
+ if (!RHSReg)
+ return 0;
+ bool RHSIsKill = hasTrivialKill(RHS);
+ return emitAddSub_rx(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, RHSIsKill,
+ ExtendType, 0, SetFlags, WantResult);
+ }
+
+ // Check if the shift can be folded into the instruction.
+ if (isValueAvailable(RHS))
+ if (const auto *SI = dyn_cast<BinaryOperator>(RHS)) {
+ if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1))) {
+ AArch64_AM::ShiftExtendType ShiftType = AArch64_AM::InvalidShiftExtend;
+ switch (SI->getOpcode()) {
+ default: break;
+ case Instruction::Shl: ShiftType = AArch64_AM::LSL; break;
+ case Instruction::LShr: ShiftType = AArch64_AM::LSR; break;
+ case Instruction::AShr: ShiftType = AArch64_AM::ASR; break;
+ }
+ uint64_t ShiftVal = C->getZExtValue();
+ if (ShiftType != AArch64_AM::InvalidShiftExtend) {
+ unsigned RHSReg = getRegForValue(SI->getOperand(0));
+ if (!RHSReg)
+ return 0;
+ bool RHSIsKill = hasTrivialKill(SI->getOperand(0));
+ return emitAddSub_rs(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg,
+ RHSIsKill, ShiftType, ShiftVal, SetFlags,
+ WantResult);
+ }
+ }
+ }
+
+ unsigned RHSReg = getRegForValue(RHS);
+ if (!RHSReg)
+ return 0;
+ bool RHSIsKill = hasTrivialKill(RHS);
+
+ if (NeedExtend)
+ RHSReg = EmitIntExt(SrcVT, RHSReg, RetVT, IsZExt);
+
+ return emitAddSub_rr(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, RHSIsKill,
+ SetFlags, WantResult);
+}
+
+unsigned AArch64FastISel::emitAddSub_rr(bool UseAdd, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg,
+ bool RHSIsKill, bool SetFlags,
+ bool WantResult) {
+ assert(LHSReg && RHSReg && "Invalid register number.");
+
+ if (RetVT != MVT::i32 && RetVT != MVT::i64)
+ return 0;
+
+ static const unsigned OpcTable[2][2][2] = {
+ { { AArch64::SUBWrr, AArch64::SUBXrr },
+ { AArch64::ADDWrr, AArch64::ADDXrr } },
+ { { AArch64::SUBSWrr, AArch64::SUBSXrr },
+ { AArch64::ADDSWrr, AArch64::ADDSXrr } }
+ };
+ bool Is64Bit = RetVT == MVT::i64;
+ unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit];
+ const TargetRegisterClass *RC =
+ Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ unsigned ResultReg;
+ if (WantResult)
+ ResultReg = createResultReg(RC);
+ else
+ ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
+
+ const MCInstrDesc &II = TII.get(Opc);
+ LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs());
+ RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)
+ .addReg(LHSReg, getKillRegState(LHSIsKill))
+ .addReg(RHSReg, getKillRegState(RHSIsKill));
+ return ResultReg;
+}
+
+unsigned AArch64FastISel::emitAddSub_ri(bool UseAdd, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, uint64_t Imm,
+ bool SetFlags, bool WantResult) {
+ assert(LHSReg && "Invalid register number.");
+
+ if (RetVT != MVT::i32 && RetVT != MVT::i64)
+ return 0;
+
+ unsigned ShiftImm;
+ if (isUInt<12>(Imm))
+ ShiftImm = 0;
+ else if ((Imm & 0xfff000) == Imm) {
+ ShiftImm = 12;
+ Imm >>= 12;
+ } else
+ return 0;
+
+ static const unsigned OpcTable[2][2][2] = {
+ { { AArch64::SUBWri, AArch64::SUBXri },
+ { AArch64::ADDWri, AArch64::ADDXri } },
+ { { AArch64::SUBSWri, AArch64::SUBSXri },
+ { AArch64::ADDSWri, AArch64::ADDSXri } }
+ };
+ bool Is64Bit = RetVT == MVT::i64;
+ unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit];
+ const TargetRegisterClass *RC;
+ if (SetFlags)
+ RC = Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ else
+ RC = Is64Bit ? &AArch64::GPR64spRegClass : &AArch64::GPR32spRegClass;
+ unsigned ResultReg;
+ if (WantResult)
+ ResultReg = createResultReg(RC);
+ else
+ ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
+
+ const MCInstrDesc &II = TII.get(Opc);
+ LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs());
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)
+ .addReg(LHSReg, getKillRegState(LHSIsKill))
+ .addImm(Imm)
+ .addImm(getShifterImm(AArch64_AM::LSL, ShiftImm));
+ return ResultReg;
+}
+
+unsigned AArch64FastISel::emitAddSub_rs(bool UseAdd, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg,
+ bool RHSIsKill,
+ AArch64_AM::ShiftExtendType ShiftType,
+ uint64_t ShiftImm, bool SetFlags,
+ bool WantResult) {
+ assert(LHSReg && RHSReg && "Invalid register number.");
+
+ if (RetVT != MVT::i32 && RetVT != MVT::i64)
+ return 0;
+
+ static const unsigned OpcTable[2][2][2] = {
+ { { AArch64::SUBWrs, AArch64::SUBXrs },
+ { AArch64::ADDWrs, AArch64::ADDXrs } },
+ { { AArch64::SUBSWrs, AArch64::SUBSXrs },
+ { AArch64::ADDSWrs, AArch64::ADDSXrs } }
+ };
+ bool Is64Bit = RetVT == MVT::i64;
+ unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit];
+ const TargetRegisterClass *RC =
+ Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ unsigned ResultReg;
+ if (WantResult)
+ ResultReg = createResultReg(RC);
+ else
+ ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
+
+ const MCInstrDesc &II = TII.get(Opc);
+ LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs());
+ RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)
+ .addReg(LHSReg, getKillRegState(LHSIsKill))
+ .addReg(RHSReg, getKillRegState(RHSIsKill))
+ .addImm(getShifterImm(ShiftType, ShiftImm));
+ return ResultReg;
+}
+
+unsigned AArch64FastISel::emitAddSub_rx(bool UseAdd, MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg,
+ bool RHSIsKill,
+ AArch64_AM::ShiftExtendType ExtType,
+ uint64_t ShiftImm, bool SetFlags,
+ bool WantResult) {
+ assert(LHSReg && RHSReg && "Invalid register number.");
+
+ if (RetVT != MVT::i32 && RetVT != MVT::i64)
+ return 0;
+
+ static const unsigned OpcTable[2][2][2] = {
+ { { AArch64::SUBWrx, AArch64::SUBXrx },
+ { AArch64::ADDWrx, AArch64::ADDXrx } },
+ { { AArch64::SUBSWrx, AArch64::SUBSXrx },
+ { AArch64::ADDSWrx, AArch64::ADDSXrx } }
+ };
+ bool Is64Bit = RetVT == MVT::i64;
+ unsigned Opc = OpcTable[SetFlags][UseAdd][Is64Bit];
+ const TargetRegisterClass *RC = nullptr;
+ if (SetFlags)
+ RC = Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ else
+ RC = Is64Bit ? &AArch64::GPR64spRegClass : &AArch64::GPR32spRegClass;
+ unsigned ResultReg;
+ if (WantResult)
+ ResultReg = createResultReg(RC);
+ else
+ ResultReg = Is64Bit ? AArch64::XZR : AArch64::WZR;
+
+ const MCInstrDesc &II = TII.get(Opc);
+ LHSReg = constrainOperandRegClass(II, LHSReg, II.getNumDefs());
+ RHSReg = constrainOperandRegClass(II, RHSReg, II.getNumDefs() + 1);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)
+ .addReg(LHSReg, getKillRegState(LHSIsKill))
+ .addReg(RHSReg, getKillRegState(RHSIsKill))
+ .addImm(getArithExtendImm(ExtType, ShiftImm));
+ return ResultReg;
+}
+
+bool AArch64FastISel::emitCmp(const Value *LHS, const Value *RHS, bool IsZExt) {
+ Type *Ty = LHS->getType();
+ EVT EVT = TLI.getValueType(Ty, true);
+ if (!EVT.isSimple())
+ return false;
+ MVT VT = EVT.getSimpleVT();
+
+ switch (VT.SimpleTy) {
+ default:
+ return false;
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ case MVT::i32:
+ case MVT::i64:
+ return emitICmp(VT, LHS, RHS, IsZExt);
+ case MVT::f32:
+ case MVT::f64:
+ return emitFCmp(VT, LHS, RHS);
+ }
+}
+
+bool AArch64FastISel::emitICmp(MVT RetVT, const Value *LHS, const Value *RHS,
+ bool IsZExt) {
+ return emitSub(RetVT, LHS, RHS, /*SetFlags=*/true, /*WantResult=*/false,
+ IsZExt) != 0;
+}
+
+bool AArch64FastISel::emitICmp_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill,
+ uint64_t Imm) {
+ return emitAddSub_ri(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, Imm,
+ /*SetFlags=*/true, /*WantResult=*/false) != 0;
+}
+
+bool AArch64FastISel::emitFCmp(MVT RetVT, const Value *LHS, const Value *RHS) {
+ if (RetVT != MVT::f32 && RetVT != MVT::f64)
+ return false;
+
+ // Check to see if the 2nd operand is a constant that we can encode directly
+ // in the compare.
+ bool UseImm = false;
+ if (const auto *CFP = dyn_cast<ConstantFP>(RHS))
+ if (CFP->isZero() && !CFP->isNegative())
+ UseImm = true;
+
+ unsigned LHSReg = getRegForValue(LHS);
+ if (!LHSReg)
+ return false;
+ bool LHSIsKill = hasTrivialKill(LHS);
+
+ if (UseImm) {
+ unsigned Opc = (RetVT == MVT::f64) ? AArch64::FCMPDri : AArch64::FCMPSri;
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc))
+ .addReg(LHSReg, getKillRegState(LHSIsKill));
+ return true;
+ }
+
+ unsigned RHSReg = getRegForValue(RHS);
+ if (!RHSReg)
+ return false;
+ bool RHSIsKill = hasTrivialKill(RHS);
+
+ unsigned Opc = (RetVT == MVT::f64) ? AArch64::FCMPDrr : AArch64::FCMPSrr;
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc))
+ .addReg(LHSReg, getKillRegState(LHSIsKill))
+ .addReg(RHSReg, getKillRegState(RHSIsKill));
+ return true;
+}
+
+unsigned AArch64FastISel::emitAdd(MVT RetVT, const Value *LHS, const Value *RHS,
+ bool SetFlags, bool WantResult, bool IsZExt) {
+ return emitAddSub(/*UseAdd=*/true, RetVT, LHS, RHS, SetFlags, WantResult,
+ IsZExt);
+}
+
+unsigned AArch64FastISel::emitSub(MVT RetVT, const Value *LHS, const Value *RHS,
+ bool SetFlags, bool WantResult, bool IsZExt) {
+ return emitAddSub(/*UseAdd=*/false, RetVT, LHS, RHS, SetFlags, WantResult,
+ IsZExt);
+}
+
+unsigned AArch64FastISel::emitSubs_rr(MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg,
+ bool RHSIsKill, bool WantResult) {
+ return emitAddSub_rr(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, RHSReg,
+ RHSIsKill, /*SetFlags=*/true, WantResult);
+}
+
+unsigned AArch64FastISel::emitSubs_rs(MVT RetVT, unsigned LHSReg,
+ bool LHSIsKill, unsigned RHSReg,
+ bool RHSIsKill,
+ AArch64_AM::ShiftExtendType ShiftType,
+ uint64_t ShiftImm, bool WantResult) {
+ return emitAddSub_rs(/*UseAdd=*/false, RetVT, LHSReg, LHSIsKill, RHSReg,
+ RHSIsKill, ShiftType, ShiftImm, /*SetFlags=*/true,
+ WantResult);
+}
+
+unsigned AArch64FastISel::emitLogicalOp(unsigned ISDOpc, MVT RetVT,
+ const Value *LHS, const Value *RHS) {
+ if (RetVT != MVT::i32 && RetVT != MVT::i64)
+ return 0;
+
+ // Canonicalize immediates to the RHS first.
+ if (isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS))
+ std::swap(LHS, RHS);
+
+ // Canonicalize shift immediate to the RHS.
+ if (isValueAvailable(LHS))
+ if (const auto *SI = dyn_cast<BinaryOperator>(LHS))
+ if (isa<ConstantInt>(SI->getOperand(1)))
+ if (SI->getOpcode() == Instruction::Shl)
+ std::swap(LHS, RHS);
+
+ unsigned LHSReg = getRegForValue(LHS);
+ if (!LHSReg)
+ return 0;
+ bool LHSIsKill = hasTrivialKill(LHS);
+
+ unsigned ResultReg = 0;
+ if (const auto *C = dyn_cast<ConstantInt>(RHS)) {
+ uint64_t Imm = C->getZExtValue();
+ ResultReg = emitLogicalOp_ri(ISDOpc, RetVT, LHSReg, LHSIsKill, Imm);
+ }
+ if (ResultReg)
+ return ResultReg;
+
+ // Check if the shift can be folded into the instruction.
+ if (isValueAvailable(RHS))
+ if (const auto *SI = dyn_cast<BinaryOperator>(RHS))
+ if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1)))
+ if (SI->getOpcode() == Instruction::Shl) {
+ uint64_t ShiftVal = C->getZExtValue();
+ unsigned RHSReg = getRegForValue(SI->getOperand(0));
+ if (!RHSReg)
+ return 0;
+ bool RHSIsKill = hasTrivialKill(SI->getOperand(0));
+ return emitLogicalOp_rs(ISDOpc, RetVT, LHSReg, LHSIsKill, RHSReg,
+ RHSIsKill, ShiftVal);
+ }
+
+ unsigned RHSReg = getRegForValue(RHS);
+ if (!RHSReg)
+ return 0;
+ bool RHSIsKill = hasTrivialKill(RHS);
+
+ return fastEmit_rr(RetVT, RetVT, ISDOpc, LHSReg, LHSIsKill, RHSReg,
+ RHSIsKill);
+}
+
+unsigned AArch64FastISel::emitLogicalOp_ri(unsigned ISDOpc, MVT RetVT,
+ unsigned LHSReg, bool LHSIsKill,
+ uint64_t Imm) {
+ assert((ISD::AND + 1 == ISD::OR) && (ISD::AND + 2 == ISD::XOR) &&
+ "ISD nodes are not consecutive!");
+ static const unsigned OpcTable[3][2] = {
+ { AArch64::ANDWri, AArch64::ANDXri },
+ { AArch64::ORRWri, AArch64::ORRXri },
+ { AArch64::EORWri, AArch64::EORXri }
+ };
+ const TargetRegisterClass *RC;
+ unsigned Opc;
+ unsigned RegSize;
+ switch (RetVT.SimpleTy) {
+ default:
+ return 0;
+ case MVT::i32: {
+ unsigned Idx = ISDOpc - ISD::AND;
+ Opc = OpcTable[Idx][0];
+ RC = &AArch64::GPR32spRegClass;
+ RegSize = 32;
+ break;
+ }
+ case MVT::i64:
+ Opc = OpcTable[ISDOpc - ISD::AND][1];
+ RC = &AArch64::GPR64spRegClass;
+ RegSize = 64;
+ break;
+ }
+
+ if (!AArch64_AM::isLogicalImmediate(Imm, RegSize))
+ return 0;
+
+ return fastEmitInst_ri(Opc, RC, LHSReg, LHSIsKill,
+ AArch64_AM::encodeLogicalImmediate(Imm, RegSize));
+}
+
+unsigned AArch64FastISel::emitLogicalOp_rs(unsigned ISDOpc, MVT RetVT,
+ unsigned LHSReg, bool LHSIsKill,
+ unsigned RHSReg, bool RHSIsKill,
+ uint64_t ShiftImm) {
+ assert((ISD::AND + 1 == ISD::OR) && (ISD::AND + 2 == ISD::XOR) &&
+ "ISD nodes are not consecutive!");
+ static const unsigned OpcTable[3][2] = {
+ { AArch64::ANDWrs, AArch64::ANDXrs },
+ { AArch64::ORRWrs, AArch64::ORRXrs },
+ { AArch64::EORWrs, AArch64::EORXrs }
+ };
+ const TargetRegisterClass *RC;
+ unsigned Opc;
+ switch (RetVT.SimpleTy) {
+ default:
+ return 0;
+ case MVT::i32:
+ Opc = OpcTable[ISDOpc - ISD::AND][0];
+ RC = &AArch64::GPR32RegClass;
+ break;
+ case MVT::i64:
+ Opc = OpcTable[ISDOpc - ISD::AND][1];
+ RC = &AArch64::GPR64RegClass;
+ break;
+ }
+ return fastEmitInst_rri(Opc, RC, LHSReg, LHSIsKill, RHSReg, RHSIsKill,
+ AArch64_AM::getShifterImm(AArch64_AM::LSL, ShiftImm));
+}
+
+unsigned AArch64FastISel::emitAnd_ri(MVT RetVT, unsigned LHSReg, bool LHSIsKill,
+ uint64_t Imm) {
+ return emitLogicalOp_ri(ISD::AND, RetVT, LHSReg, LHSIsKill, Imm);
+}
+
bool AArch64FastISel::EmitLoad(MVT VT, unsigned &ResultReg, Address Addr,
MachineMemOperand *MMO) {
// Simplify this down to something we can handle.
// Loading an i1 requires special handling.
if (VTIsi1) {
- MRI.constrainRegClass(ResultReg, &AArch64::GPR32RegClass);
- unsigned ANDReg = createResultReg(&AArch64::GPR32spRegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ANDWri),
- ANDReg)
- .addReg(ResultReg)
- .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
+ unsigned ANDReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, 1);
+ assert(ANDReg && "Unexpected AND instruction emission failure.");
ResultReg = ANDReg;
}
return true;
}
+bool AArch64FastISel::selectAddSub(const Instruction *I) {
+ MVT VT;
+ if (!isTypeSupported(I->getType(), VT))
+ return false;
+
+ unsigned ResultReg;
+ if (I->getOpcode() == Instruction::Add)
+ ResultReg = emitAdd(VT, I->getOperand(0), I->getOperand(1));
+ else if (I->getOpcode() == Instruction::Sub)
+ ResultReg = emitSub(VT, I->getOperand(0), I->getOperand(1));
+ else
+ llvm_unreachable("Unexpected instruction.");
+
+ assert(ResultReg && "Couldn't select Add/Sub instruction.");
+ updateValueMap(I, ResultReg);
+ return true;
+}
+
+bool AArch64FastISel::selectLogicalOp(const Instruction *I) {
+ MVT VT;
+ if (!isTypeSupported(I->getType(), VT))
+ return false;
+
+ unsigned ISDOpc;
+ switch (I->getOpcode()) {
+ default:
+ llvm_unreachable("Unexpected opcode.");
+ case Instruction::And:
+ ISDOpc = ISD::AND;
+ break;
+ case Instruction::Or:
+ ISDOpc = ISD::OR;
+ break;
+ case Instruction::Xor:
+ ISDOpc = ISD::XOR;
+ break;
+ }
+ unsigned ResultReg =
+ emitLogicalOp(ISDOpc, VT, I->getOperand(0), I->getOperand(1));
+ if (!ResultReg)
+ return false;
+
+ updateValueMap(I, ResultReg);
+ return true;
+}
+
bool AArch64FastISel::SelectLoad(const Instruction *I) {
MVT VT;
// Verify we have a legal type before going any further. Currently, we handle
if (!EmitLoad(VT, ResultReg, Addr, createMachineMemOperandFor(I)))
return false;
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
}
// Storing an i1 requires special handling.
- if (VTIsi1) {
- MRI.constrainRegClass(SrcReg, &AArch64::GPR32RegClass);
- unsigned ANDReg = createResultReg(&AArch64::GPR32spRegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ANDWri),
- ANDReg)
- .addReg(SrcReg)
- .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
+ if (VTIsi1 && SrcReg != AArch64::WZR) {
+ unsigned ANDReg = emitAnd_ri(MVT::i32, SrcReg, /*TODO:IsKill=*/false, 1);
+ assert(ANDReg && "Unexpected AND instruction emission failure.");
SrcReg = ANDReg;
}
// Create the base instruction, then add the operands.
- MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(Opc))
- .addReg(SrcReg);
+ const MCInstrDesc &II = TII.get(Opc);
+ SrcReg = constrainOperandRegClass(II, SrcReg, II.getNumDefs());
+ MachineInstrBuilder MIB =
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(SrcReg);
AddLoadStoreOperands(Addr, MIB, MachineMemOperand::MOStore, ScaleFactor, MMO);
return true;
bool AArch64FastISel::SelectStore(const Instruction *I) {
MVT VT;
- Value *Op0 = I->getOperand(0);
+ const Value *Op0 = I->getOperand(0);
// Verify we have a legal type before going any further. Currently, we handle
// simple types that will directly fit in a register (i32/f32/i64/f64) or
// those that can be sign or zero-extended to a basic operation (i1/i8/i16).
cast<StoreInst>(I)->isAtomic())
return false;
- // Get the value to be stored into a register.
- unsigned SrcReg = getRegForValue(Op0);
- if (SrcReg == 0)
+ // Get the value to be stored into a register. Use the zero register directly
+ // when possible to avoid an unnecessary copy and a wasted register.
+ unsigned SrcReg = 0;
+ if (const auto *CI = dyn_cast<ConstantInt>(Op0)) {
+ if (CI->isZero())
+ SrcReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR;
+ } else if (const auto *CF = dyn_cast<ConstantFP>(Op0)) {
+ if (CF->isZero() && !CF->isNegative()) {
+ VT = MVT::getIntegerVT(VT.getSizeInBits());
+ SrcReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR;
+ }
+ }
+
+ if (!SrcReg)
+ SrcReg = getRegForValue(Op0);
+
+ if (!SrcReg)
return false;
// See if we can handle this address.
bool AArch64FastISel::SelectBranch(const Instruction *I) {
const BranchInst *BI = cast<BranchInst>(I);
+ if (BI->isUnconditional()) {
+ MachineBasicBlock *MSucc = FuncInfo.MBBMap[BI->getSuccessor(0)];
+ fastEmitBranch(MSucc, BI->getDebugLoc());
+ return true;
+ }
+
MachineBasicBlock *TBB = FuncInfo.MBBMap[BI->getSuccessor(0)];
MachineBasicBlock *FBB = FuncInfo.MBBMap[BI->getSuccessor(1)];
return false;
// Emit the cmp.
- if (!EmitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned()))
+ if (!emitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned()))
return false;
// Emit the branch.
TBB->getBasicBlock());
FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
- FastEmitBranch(FBB, DbgLoc);
+ fastEmitBranch(FBB, DbgLoc);
return true;
}
} else if (TruncInst *TI = dyn_cast<TruncInst>(BI->getCondition())) {
MVT SrcVT;
if (TI->hasOneUse() && TI->getParent() == I->getParent() &&
- (isLoadStoreTypeLegal(TI->getOperand(0)->getType(), SrcVT))) {
+ (isTypeSupported(TI->getOperand(0)->getType(), SrcVT))) {
unsigned CondReg = getRegForValue(TI->getOperand(0));
- if (CondReg == 0)
+ if (!CondReg)
return false;
+ bool CondIsKill = hasTrivialKill(TI->getOperand(0));
// Issue an extract_subreg to get the lower 32-bits.
- if (SrcVT == MVT::i64)
- CondReg = FastEmitInst_extractsubreg(MVT::i32, CondReg, /*Kill=*/true,
+ if (SrcVT == MVT::i64) {
+ CondReg = fastEmitInst_extractsubreg(MVT::i32, CondReg, CondIsKill,
AArch64::sub_32);
+ CondIsKill = true;
+ }
- MRI.constrainRegClass(CondReg, &AArch64::GPR32RegClass);
- unsigned ANDReg = createResultReg(&AArch64::GPR32spRegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(AArch64::ANDWri), ANDReg)
- .addReg(CondReg)
- .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(AArch64::SUBSWri))
- .addReg(ANDReg)
- .addReg(ANDReg)
- .addImm(0)
- .addImm(0);
+ unsigned ANDReg = emitAnd_ri(MVT::i32, CondReg, CondIsKill, 1);
+ assert(ANDReg && "Unexpected AND instruction emission failure.");
+ emitICmp_ri(MVT::i32, ANDReg, /*IsKill=*/true, 0);
if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
std::swap(TBB, FBB);
TBB->getBasicBlock());
FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
- FastEmitBranch(FBB, DbgLoc);
+ fastEmitBranch(FBB, DbgLoc);
return true;
}
} else if (const ConstantInt *CI =
TBB->getBasicBlock());
FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
- FastEmitBranch(FBB, DbgLoc);
+ fastEmitBranch(FBB, DbgLoc);
return true;
}
unsigned CondReg = getRegForValue(BI->getCondition());
if (CondReg == 0)
return false;
+ bool CondRegIsKill = hasTrivialKill(BI->getCondition());
// We've been divorced from our compare! Our block was split, and
// now our compare lives in a predecessor block. We musn't
// Regardless, the compare has been done in the predecessor block,
// and it left a value for us in a virtual register. Ergo, we test
// the one-bit value left in the virtual register.
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::SUBSWri),
- AArch64::WZR)
- .addReg(CondReg)
- .addImm(0)
- .addImm(0);
+ emitICmp_ri(MVT::i32, CondReg, CondRegIsKill, 0);
if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
std::swap(TBB, FBB);
TBB->getBasicBlock());
FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
- FastEmitBranch(FBB, DbgLoc);
+ fastEmitBranch(FBB, DbgLoc);
return true;
}
return false;
// Emit the indirect branch.
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::BR))
- .addReg(AddrReg);
+ const MCInstrDesc &II = TII.get(AArch64::BR);
+ AddrReg = constrainOperandRegClass(II, AddrReg, II.getNumDefs());
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(AddrReg);
// Make sure the CFG is up-to-date.
for (unsigned i = 0, e = BI->getNumSuccessors(); i != e; ++i)
return true;
}
-bool AArch64FastISel::EmitCmp(Value *Src1Value, Value *Src2Value, bool isZExt) {
- Type *Ty = Src1Value->getType();
- EVT SrcEVT = TLI.getValueType(Ty, true);
- if (!SrcEVT.isSimple())
- return false;
- MVT SrcVT = SrcEVT.getSimpleVT();
-
- // Check to see if the 2nd operand is a constant that we can encode directly
- // in the compare.
- uint64_t Imm;
- bool UseImm = false;
- bool isNegativeImm = false;
- if (const ConstantInt *ConstInt = dyn_cast<ConstantInt>(Src2Value)) {
- if (SrcVT == MVT::i64 || SrcVT == MVT::i32 || SrcVT == MVT::i16 ||
- SrcVT == MVT::i8 || SrcVT == MVT::i1) {
- const APInt &CIVal = ConstInt->getValue();
-
- Imm = (isZExt) ? CIVal.getZExtValue() : CIVal.getSExtValue();
- if (CIVal.isNegative()) {
- isNegativeImm = true;
- Imm = -Imm;
- }
- // FIXME: We can handle more immediates using shifts.
- UseImm = ((Imm & 0xfff) == Imm);
- }
- } else if (const ConstantFP *ConstFP = dyn_cast<ConstantFP>(Src2Value)) {
- if (SrcVT == MVT::f32 || SrcVT == MVT::f64)
- if (ConstFP->isZero() && !ConstFP->isNegative())
- UseImm = true;
- }
-
- unsigned ZReg;
- unsigned CmpOpc;
- bool isICmp = true;
- bool needsExt = false;
- switch (SrcVT.SimpleTy) {
- default:
- return false;
- case MVT::i1:
- case MVT::i8:
- case MVT::i16:
- needsExt = true;
- // Intentional fall-through.
- case MVT::i32:
- ZReg = AArch64::WZR;
- if (UseImm)
- CmpOpc = isNegativeImm ? AArch64::ADDSWri : AArch64::SUBSWri;
- else
- CmpOpc = AArch64::SUBSWrr;
- break;
- case MVT::i64:
- ZReg = AArch64::XZR;
- if (UseImm)
- CmpOpc = isNegativeImm ? AArch64::ADDSXri : AArch64::SUBSXri;
- else
- CmpOpc = AArch64::SUBSXrr;
- break;
- case MVT::f32:
- isICmp = false;
- CmpOpc = UseImm ? AArch64::FCMPSri : AArch64::FCMPSrr;
- break;
- case MVT::f64:
- isICmp = false;
- CmpOpc = UseImm ? AArch64::FCMPDri : AArch64::FCMPDrr;
- break;
- }
-
- unsigned SrcReg1 = getRegForValue(Src1Value);
- if (SrcReg1 == 0)
- return false;
-
- unsigned SrcReg2;
- if (!UseImm) {
- SrcReg2 = getRegForValue(Src2Value);
- if (SrcReg2 == 0)
- return false;
- }
-
- // We have i1, i8, or i16, we need to either zero extend or sign extend.
- if (needsExt) {
- SrcReg1 = EmitIntExt(SrcVT, SrcReg1, MVT::i32, isZExt);
- if (SrcReg1 == 0)
- return false;
- if (!UseImm) {
- SrcReg2 = EmitIntExt(SrcVT, SrcReg2, MVT::i32, isZExt);
- if (SrcReg2 == 0)
- return false;
- }
- }
-
- if (isICmp) {
- if (UseImm)
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(CmpOpc))
- .addReg(ZReg)
- .addReg(SrcReg1)
- .addImm(Imm)
- .addImm(0);
- else
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(CmpOpc))
- .addReg(ZReg)
- .addReg(SrcReg1)
- .addReg(SrcReg2);
- } else {
- if (UseImm)
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(CmpOpc))
- .addReg(SrcReg1);
- else
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(CmpOpc))
- .addReg(SrcReg1)
- .addReg(SrcReg2);
- }
- return true;
-}
-
bool AArch64FastISel::SelectCmp(const Instruction *I) {
const CmpInst *CI = cast<CmpInst>(I);
return false;
// Emit the cmp.
- if (!EmitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned()))
+ if (!emitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned()))
return false;
// Now set a register based on the comparison.
.addReg(AArch64::WZR)
.addImm(invertedCC);
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
return false;
unsigned SelectOpc;
+ const TargetRegisterClass *RC = nullptr;
switch (DestVT.SimpleTy) {
default: return false;
- case MVT::i32: SelectOpc = AArch64::CSELWr; break;
- case MVT::i64: SelectOpc = AArch64::CSELXr; break;
- case MVT::f32: SelectOpc = AArch64::FCSELSrrr; break;
- case MVT::f64: SelectOpc = AArch64::FCSELDrrr; break;
+ case MVT::i32:
+ SelectOpc = AArch64::CSELWr; RC = &AArch64::GPR32RegClass; break;
+ case MVT::i64:
+ SelectOpc = AArch64::CSELXr; RC = &AArch64::GPR64RegClass; break;
+ case MVT::f32:
+ SelectOpc = AArch64::FCSELSrrr; RC = &AArch64::FPR32RegClass; break;
+ case MVT::f64:
+ SelectOpc = AArch64::FCSELDrrr; RC = &AArch64::FPR64RegClass; break;
}
const Value *Cond = SI->getCondition();
bool CondIsKill = hasTrivialKill(Cond);
if (NeedTest) {
- MRI.constrainRegClass(CondReg, &AArch64::GPR32RegClass);
- unsigned ANDReg = createResultReg(&AArch64::GPR32spRegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ANDWri),
- ANDReg)
- .addReg(CondReg, getKillRegState(CondIsKill))
- .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
-
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::SUBSWri))
- .addReg(ANDReg)
- .addReg(ANDReg)
- .addImm(0)
- .addImm(0);
+ unsigned ANDReg = emitAnd_ri(MVT::i32, CondReg, CondIsKill, 1);
+ assert(ANDReg && "Unexpected AND instruction emission failure.");
+ emitICmp_ri(MVT::i32, ANDReg, /*IsKill=*/true, 0);
}
unsigned TrueReg = getRegForValue(SI->getTrueValue());
if (!TrueReg || !FalseReg)
return false;
- unsigned ResultReg = createResultReg(TLI.getRegClassFor(DestVT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(SelectOpc),
- ResultReg)
- .addReg(TrueReg, getKillRegState(TrueIsKill))
- .addReg(FalseReg, getKillRegState(FalseIsKill))
- .addImm(CC);
-
- UpdateValueMap(I, ResultReg);
+ unsigned ResultReg = fastEmitInst_rri(SelectOpc, RC, TrueReg, TrueIsKill,
+ FalseReg, FalseIsKill, CC);
+ updateValueMap(I, ResultReg);
return true;
}
unsigned ResultReg = createResultReg(&AArch64::FPR64RegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::FCVTDSr),
ResultReg).addReg(Op);
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
unsigned ResultReg = createResultReg(&AArch64::FPR32RegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::FCVTSDr),
ResultReg).addReg(Op);
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
DestVT == MVT::i32 ? &AArch64::GPR32RegClass : &AArch64::GPR64RegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg)
.addReg(SrcReg);
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
"Unexpected value type.");
unsigned SrcReg = getRegForValue(I->getOperand(0));
- if (SrcReg == 0)
+ if (!SrcReg)
return false;
+ bool SrcIsKill = hasTrivialKill(I->getOperand(0));
EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType(), true);
if (SrcVT == MVT::i16 || SrcVT == MVT::i8 || SrcVT == MVT::i1) {
SrcReg =
EmitIntExt(SrcVT.getSimpleVT(), SrcReg, MVT::i32, /*isZExt*/ !Signed);
- if (SrcReg == 0)
+ if (!SrcReg)
return false;
+ SrcIsKill = true;
}
- MRI.constrainRegClass(SrcReg, SrcVT == MVT::i64 ? &AArch64::GPR64RegClass
- : &AArch64::GPR32RegClass);
-
unsigned Opc;
if (SrcVT == MVT::i64) {
if (Signed)
Opc = (DestVT == MVT::f32) ? AArch64::UCVTFUWSri : AArch64::UCVTFUWDri;
}
- unsigned ResultReg = createResultReg(TLI.getRegClassFor(DestVT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg)
- .addReg(SrcReg);
- UpdateValueMap(I, ResultReg);
+ unsigned ResultReg = fastEmitInst_r(Opc, TLI.getRegClassFor(DestVT), SrcReg,
+ SrcIsKill);
+ updateValueMap(I, ResultReg);
return true;
}
-bool AArch64FastISel::FastLowerArguments() {
+bool AArch64FastISel::fastLowerArguments() {
if (!FuncInfo.CanLowerReturn)
return false;
for (auto const &Arg : F->args()) {
MVT VT = TLI.getSimpleValueType(Arg.getType());
unsigned SrcReg;
+ const TargetRegisterClass *RC = nullptr;
switch (VT.SimpleTy) {
default: llvm_unreachable("Unexpected value type.");
case MVT::i1:
case MVT::i8:
case MVT::i16: VT = MVT::i32; // fall-through
- case MVT::i32: SrcReg = Registers[0][GPRIdx++]; break;
- case MVT::i64: SrcReg = Registers[1][GPRIdx++]; break;
- case MVT::f16: SrcReg = Registers[2][FPRIdx++]; break;
- case MVT::f32: SrcReg = Registers[3][FPRIdx++]; break;
- case MVT::f64: SrcReg = Registers[4][FPRIdx++]; break;
+ case MVT::i32:
+ SrcReg = Registers[0][GPRIdx++]; RC = &AArch64::GPR32RegClass; break;
+ case MVT::i64:
+ SrcReg = Registers[1][GPRIdx++]; RC = &AArch64::GPR64RegClass; break;
+ case MVT::f16:
+ SrcReg = Registers[2][FPRIdx++]; RC = &AArch64::FPR16RegClass; break;
+ case MVT::f32:
+ SrcReg = Registers[3][FPRIdx++]; RC = &AArch64::FPR32RegClass; break;
+ case MVT::f64:
+ SrcReg = Registers[4][FPRIdx++]; RC = &AArch64::FPR64RegClass; break;
}
// Skip unused arguments.
if (Arg.use_empty()) {
- UpdateValueMap(&Arg, 0);
+ updateValueMap(&Arg, 0);
continue;
}
- const TargetRegisterClass *RC = TLI.getRegClassFor(VT);
unsigned DstReg = FuncInfo.MF->addLiveIn(SrcReg, RC);
// FIXME: Unfortunately it's necessary to emit a copy from the livein copy.
// Without this, EmitLiveInCopies may eliminate the livein if its only
unsigned ResultReg = createResultReg(RC);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
TII.get(TargetOpcode::COPY), ResultReg)
- .addReg(DstReg, getKillRegState(true));
- UpdateValueMap(&Arg, ResultReg);
+ .addReg(DstReg, getKillRegState(true));
+ updateValueMap(&Arg, ResultReg);
}
return true;
}
unsigned ResultReg = createResultReg(TLI.getRegClassFor(CopyVT));
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
TII.get(TargetOpcode::COPY), ResultReg)
- .addReg(RVLocs[0].getLocReg());
+ .addReg(RVLocs[0].getLocReg());
CLI.InRegs.push_back(RVLocs[0].getLocReg());
CLI.ResultReg = ResultReg;
return true;
}
-bool AArch64FastISel::FastLowerCall(CallLoweringInfo &CLI) {
+bool AArch64FastISel::fastLowerCall(CallLoweringInfo &CLI) {
CallingConv::ID CC = CLI.CallConv;
bool IsTailCall = CLI.IsTailCall;
bool IsVarArg = CLI.IsVarArg;
// Issue the call.
MachineInstrBuilder MIB;
if (CM == CodeModel::Small) {
- unsigned CallOpc = Addr.getReg() ? AArch64::BLR : AArch64::BL;
- MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(CallOpc));
+ const MCInstrDesc &II = TII.get(Addr.getReg() ? AArch64::BLR : AArch64::BL);
+ MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II);
if (SymName)
MIB.addExternalSymbol(SymName, 0);
else if (Addr.getGlobalValue())
MIB.addGlobalAddress(Addr.getGlobalValue(), 0, 0);
- else if (Addr.getReg())
- MIB.addReg(Addr.getReg());
- else
+ else if (Addr.getReg()) {
+ unsigned Reg = constrainOperandRegClass(II, Addr.getReg(), 0);
+ MIB.addReg(Reg);
+ } else
return false;
} else {
unsigned CallReg = 0;
if (!CallReg)
return false;
- MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(AArch64::BLR)).addReg(CallReg);
+ const MCInstrDesc &II = TII.get(AArch64::BLR);
+ CallReg = constrainOperandRegClass(II, CallReg, 0);
+ MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II).addReg(CallReg);
}
// Add implicit physical register uses to the call.
return true;
}
-bool AArch64FastISel::FastLowerIntrinsicCall(const IntrinsicInst *II) {
+bool AArch64FastISel::fastLowerIntrinsicCall(const IntrinsicInst *II) {
// FIXME: Handle more intrinsics.
switch (II->getIntrinsicID()) {
default: return false;
static_cast<const AArch64RegisterInfo *>(
TM.getSubtargetImpl()->getRegisterInfo());
unsigned FramePtr = RegInfo->getFrameRegister(*(FuncInfo.MF));
- unsigned SrcReg = FramePtr;
-
+ unsigned SrcReg = MRI.createVirtualRegister(&AArch64::GPR64RegClass);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(TargetOpcode::COPY), SrcReg).addReg(FramePtr);
// Recursively load frame address
// ldr x0, [fp]
// ldr x0, [x0]
unsigned DestReg;
unsigned Depth = cast<ConstantInt>(II->getOperand(0))->getZExtValue();
while (Depth--) {
- DestReg = createResultReg(&AArch64::GPR64RegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(AArch64::LDRXui), DestReg)
- .addReg(SrcReg).addImm(0);
+ DestReg = fastEmitInst_ri(AArch64::LDRXui, &AArch64::GPR64RegClass,
+ SrcReg, /*IsKill=*/true, 0);
+ assert(DestReg && "Unexpected LDR instruction emission failure.");
SrcReg = DestReg;
}
- UpdateValueMap(II, SrcReg);
+ updateValueMap(II, SrcReg);
return true;
}
case Intrinsic::memcpy:
return false;
const char *IntrMemName = isa<MemCpyInst>(II) ? "memcpy" : "memmove";
- return LowerCallTo(II, IntrMemName, II->getNumArgOperands() - 2);
+ return lowerCallTo(II, IntrMemName, II->getNumArgOperands() - 2);
}
case Intrinsic::memset: {
const MemSetInst *MSI = cast<MemSetInst>(II);
// address spaces.
return false;
- return LowerCallTo(II, "memset", II->getNumArgOperands() - 2);
+ return lowerCallTo(II, "memset", II->getNumArgOperands() - 2);
}
case Intrinsic::trap: {
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::BRK))
return false;
bool Op0IsKill = hasTrivialKill(II->getOperand(0));
- unsigned ResultReg = FastEmit_r(VT, VT, ISD::FSQRT, Op0Reg, Op0IsKill);
+ unsigned ResultReg = fastEmit_r(VT, VT, ISD::FSQRT, Op0Reg, Op0IsKill);
if (!ResultReg)
return false;
- UpdateValueMap(II, ResultReg);
+ updateValueMap(II, ResultReg);
return true;
}
case Intrinsic::sadd_with_overflow:
const Function *Callee = II->getCalledFunction();
auto *Ty = cast<StructType>(Callee->getReturnType());
Type *RetTy = Ty->getTypeAtIndex(0U);
- Type *CondTy = Ty->getTypeAtIndex(1);
MVT VT;
if (!isTypeLegal(RetTy, VT))
isCommutativeIntrinsic(II))
std::swap(LHS, RHS);
- unsigned LHSReg = getRegForValue(LHS);
- if (!LHSReg)
- return false;
- bool LHSIsKill = hasTrivialKill(LHS);
-
- // Check if the immediate can be encoded in the instruction and if we should
- // invert the instruction (adds -> subs) to handle negative immediates.
- bool UseImm = false;
- bool UseInverse = false;
- uint64_t Imm = 0;
- if (const auto *C = dyn_cast<ConstantInt>(RHS)) {
- if (C->isNegative()) {
- UseInverse = true;
- Imm = -(C->getSExtValue());
- } else
- Imm = C->getZExtValue();
-
- if (isUInt<12>(Imm))
- UseImm = true;
-
- UseInverse = UseImm && UseInverse;
- }
-
- static const unsigned OpcTable[2][2][2] = {
- { {AArch64::ADDSWrr, AArch64::ADDSXrr},
- {AArch64::ADDSWri, AArch64::ADDSXri} },
- { {AArch64::SUBSWrr, AArch64::SUBSXrr},
- {AArch64::SUBSWri, AArch64::SUBSXri} }
- };
- unsigned Opc = 0;
- unsigned MulReg = 0;
- unsigned RHSReg = 0;
- bool RHSIsKill = false;
+ unsigned ResultReg1 = 0, ResultReg2 = 0, MulReg = 0;
AArch64CC::CondCode CC = AArch64CC::Invalid;
- bool Is64Bit = VT == MVT::i64;
switch (II->getIntrinsicID()) {
default: llvm_unreachable("Unexpected intrinsic!");
case Intrinsic::sadd_with_overflow:
- Opc = OpcTable[UseInverse][UseImm][Is64Bit]; CC = AArch64CC::VS; break;
+ ResultReg1 = emitAdd(VT, LHS, RHS, /*SetFlags=*/true);
+ CC = AArch64CC::VS;
+ break;
case Intrinsic::uadd_with_overflow:
- Opc = OpcTable[UseInverse][UseImm][Is64Bit]; CC = AArch64CC::HS; break;
+ ResultReg1 = emitAdd(VT, LHS, RHS, /*SetFlags=*/true);
+ CC = AArch64CC::HS;
+ break;
case Intrinsic::ssub_with_overflow:
- Opc = OpcTable[!UseInverse][UseImm][Is64Bit]; CC = AArch64CC::VS; break;
+ ResultReg1 = emitSub(VT, LHS, RHS, /*SetFlags=*/true);
+ CC = AArch64CC::VS;
+ break;
case Intrinsic::usub_with_overflow:
- Opc = OpcTable[!UseInverse][UseImm][Is64Bit]; CC = AArch64CC::LO; break;
+ ResultReg1 = emitSub(VT, LHS, RHS, /*SetFlags=*/true);
+ CC = AArch64CC::LO;
+ break;
case Intrinsic::smul_with_overflow: {
CC = AArch64CC::NE;
- RHSReg = getRegForValue(RHS);
+ unsigned LHSReg = getRegForValue(LHS);
+ if (!LHSReg)
+ return false;
+ bool LHSIsKill = hasTrivialKill(LHS);
+
+ unsigned RHSReg = getRegForValue(RHS);
if (!RHSReg)
return false;
- RHSIsKill = hasTrivialKill(RHS);
+ bool RHSIsKill = hasTrivialKill(RHS);
if (VT == MVT::i32) {
MulReg = Emit_SMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
- unsigned ShiftReg = Emit_LSR_ri(MVT::i64, MulReg, false, 32);
- MulReg = FastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true,
+ unsigned ShiftReg = emitLSR_ri(MVT::i64, MVT::i64, MulReg,
+ /*IsKill=*/false, 32);
+ MulReg = fastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true,
AArch64::sub_32);
- ShiftReg = FastEmitInst_extractsubreg(VT, ShiftReg, /*IsKill=*/true,
+ ShiftReg = fastEmitInst_extractsubreg(VT, ShiftReg, /*IsKill=*/true,
AArch64::sub_32);
- unsigned CmpReg = createResultReg(TLI.getRegClassFor(VT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(AArch64::SUBSWrs), CmpReg)
- .addReg(ShiftReg, getKillRegState(true))
- .addReg(MulReg, getKillRegState(false))
- .addImm(159); // 159 <-> asr #31
+ emitSubs_rs(VT, ShiftReg, /*IsKill=*/true, MulReg, /*IsKill=*/false,
+ AArch64_AM::ASR, 31, /*WantResult=*/false);
} else {
assert(VT == MVT::i64 && "Unexpected value type.");
MulReg = Emit_MUL_rr(VT, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
- unsigned SMULHReg = FastEmit_rr(VT, VT, ISD::MULHS, LHSReg, LHSIsKill,
+ unsigned SMULHReg = fastEmit_rr(VT, VT, ISD::MULHS, LHSReg, LHSIsKill,
RHSReg, RHSIsKill);
- unsigned CmpReg = createResultReg(TLI.getRegClassFor(VT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(AArch64::SUBSXrs), CmpReg)
- .addReg(SMULHReg, getKillRegState(true))
- .addReg(MulReg, getKillRegState(false))
- .addImm(191); // 191 <-> asr #63
+ emitSubs_rs(VT, SMULHReg, /*IsKill=*/true, MulReg, /*IsKill=*/false,
+ AArch64_AM::ASR, 63, /*WantResult=*/false);
}
break;
}
case Intrinsic::umul_with_overflow: {
CC = AArch64CC::NE;
- RHSReg = getRegForValue(RHS);
+ unsigned LHSReg = getRegForValue(LHS);
+ if (!LHSReg)
+ return false;
+ bool LHSIsKill = hasTrivialKill(LHS);
+
+ unsigned RHSReg = getRegForValue(RHS);
if (!RHSReg)
return false;
- RHSIsKill = hasTrivialKill(RHS);
+ bool RHSIsKill = hasTrivialKill(RHS);
if (VT == MVT::i32) {
MulReg = Emit_UMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
- unsigned CmpReg = createResultReg(TLI.getRegClassFor(MVT::i64));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(AArch64::SUBSXrs), CmpReg)
- .addReg(AArch64::XZR, getKillRegState(true))
- .addReg(MulReg, getKillRegState(false))
- .addImm(96); // 96 <-> lsr #32
- MulReg = FastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true,
+ emitSubs_rs(MVT::i64, AArch64::XZR, /*IsKill=*/true, MulReg,
+ /*IsKill=*/false, AArch64_AM::LSR, 32,
+ /*WantResult=*/false);
+ MulReg = fastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true,
AArch64::sub_32);
} else {
assert(VT == MVT::i64 && "Unexpected value type.");
MulReg = Emit_MUL_rr(VT, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
- unsigned UMULHReg = FastEmit_rr(VT, VT, ISD::MULHU, LHSReg, LHSIsKill,
+ unsigned UMULHReg = fastEmit_rr(VT, VT, ISD::MULHU, LHSReg, LHSIsKill,
RHSReg, RHSIsKill);
- unsigned CmpReg = createResultReg(TLI.getRegClassFor(VT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(AArch64::SUBSXrr), CmpReg)
- .addReg(AArch64::XZR, getKillRegState(true))
- .addReg(UMULHReg, getKillRegState(false));
+ emitSubs_rr(VT, AArch64::XZR, /*IsKill=*/true, UMULHReg,
+ /*IsKill=*/false, /*WantResult=*/false);
}
break;
}
}
- if (!UseImm) {
- RHSReg = getRegForValue(RHS);
- if (!RHSReg)
- return false;
- RHSIsKill = hasTrivialKill(RHS);
+ if (MulReg) {
+ ResultReg1 = createResultReg(TLI.getRegClassFor(VT));
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(TargetOpcode::COPY), ResultReg1).addReg(MulReg);
}
- unsigned ResultReg = createResultReg(TLI.getRegClassFor(VT));
- if (Opc) {
- MachineInstrBuilder MIB;
- MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc),
- ResultReg)
- .addReg(LHSReg, getKillRegState(LHSIsKill));
- if (UseImm) {
- MIB.addImm(Imm);
- MIB.addImm(0);
- } else
- MIB.addReg(RHSReg, getKillRegState(RHSIsKill));
- }
- else
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(TargetOpcode::COPY), ResultReg)
- .addReg(MulReg);
-
- unsigned ResultReg2 = FuncInfo.CreateRegs(CondTy);
- assert((ResultReg+1) == ResultReg2 && "Nonconsecutive result registers.");
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::CSINCWr),
- ResultReg2)
- .addReg(AArch64::WZR, getKillRegState(true))
- .addReg(AArch64::WZR, getKillRegState(true))
- .addImm(getInvertedCondCode(CC));
-
- UpdateValueMap(II, ResultReg, 2);
+ ResultReg2 = fastEmitInst_rri(AArch64::CSINCWr, &AArch64::GPR32RegClass,
+ AArch64::WZR, /*IsKill=*/true, AArch64::WZR,
+ /*IsKill=*/true, getInvertedCondCode(CC));
+ assert((ResultReg1 + 1) == ResultReg2 &&
+ "Nonconsecutive result registers.");
+ updateValueMap(II, ResultReg1, 2);
return true;
}
}
unsigned SrcReg = getRegForValue(Op);
if (!SrcReg)
return false;
+ bool SrcIsKill = hasTrivialKill(Op);
// If we're truncating from i64 to a smaller non-legal type then generate an
- // AND. Otherwise, we know the high bits are undefined and a truncate doesn't
- // generate any code.
+ // AND. Otherwise, we know the high bits are undefined and a truncate only
+ // generate a COPY. We cannot mark the source register also as result
+ // register, because this can incorrectly transfer the kill flag onto the
+ // source register.
+ unsigned ResultReg;
if (SrcVT == MVT::i64) {
uint64_t Mask = 0;
switch (DestVT.SimpleTy) {
break;
}
// Issue an extract_subreg to get the lower 32-bits.
- unsigned Reg32 = FastEmitInst_extractsubreg(MVT::i32, SrcReg, /*Kill=*/true,
+ unsigned Reg32 = fastEmitInst_extractsubreg(MVT::i32, SrcReg, SrcIsKill,
AArch64::sub_32);
- MRI.constrainRegClass(Reg32, &AArch64::GPR32RegClass);
// Create the AND instruction which performs the actual truncation.
- unsigned ANDReg = createResultReg(&AArch64::GPR32spRegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ANDWri),
- ANDReg)
- .addReg(Reg32)
- .addImm(AArch64_AM::encodeLogicalImmediate(Mask, 32));
- SrcReg = ANDReg;
+ ResultReg = emitAnd_ri(MVT::i32, Reg32, /*IsKill=*/true, Mask);
+ assert(ResultReg && "Unexpected AND instruction emission failure.");
+ } else {
+ ResultReg = createResultReg(&AArch64::GPR32RegClass);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(TargetOpcode::COPY), ResultReg)
+ .addReg(SrcReg, getKillRegState(SrcIsKill));
}
- UpdateValueMap(I, SrcReg);
+ updateValueMap(I, ResultReg);
return true;
}
DestVT = MVT::i32;
if (isZExt) {
- MRI.constrainRegClass(SrcReg, &AArch64::GPR32RegClass);
- unsigned ResultReg = createResultReg(&AArch64::GPR32spRegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ANDWri),
- ResultReg)
- .addReg(SrcReg)
- .addImm(AArch64_AM::encodeLogicalImmediate(1, 32));
-
+ unsigned ResultReg = emitAnd_ri(MVT::i32, SrcReg, /*TODO:IsKill=*/false, 1);
+ assert(ResultReg && "Unexpected AND instruction emission failure.");
if (DestVT == MVT::i64) {
// We're ZExt i1 to i64. The ANDWri Wd, Ws, #1 implicitly clears the
// upper 32 bits. Emit a SUBREG_TO_REG to extend from Wd to Xd.
// FIXME: We're SExt i1 to i64.
return 0;
}
- unsigned ResultReg = createResultReg(&AArch64::GPR32RegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::SBFMWri),
- ResultReg)
- .addReg(SrcReg)
- .addImm(0)
- .addImm(0);
- return ResultReg;
+ return fastEmitInst_rii(AArch64::SBFMWri, &AArch64::GPR32RegClass, SrcReg,
+ /*TODO:IsKill=*/false, 0, 0);
}
}
Opc = AArch64::MADDXrrr; ZReg = AArch64::XZR; break;
}
- // Create the base instruction, then add the operands.
- unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg)
- .addReg(Op0, getKillRegState(Op0IsKill))
- .addReg(Op1, getKillRegState(Op1IsKill))
- .addReg(ZReg, getKillRegState(true));
-
- return ResultReg;
+ const TargetRegisterClass *RC =
+ (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ return fastEmitInst_rrr(Opc, RC, Op0, Op0IsKill, Op1, Op1IsKill,
+ /*IsKill=*/ZReg, true);
}
unsigned AArch64FastISel::Emit_SMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
if (RetVT != MVT::i64)
return 0;
- // Create the base instruction, then add the operands.
- unsigned ResultReg = createResultReg(&AArch64::GPR64RegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::SMADDLrrr),
- ResultReg)
- .addReg(Op0, getKillRegState(Op0IsKill))
- .addReg(Op1, getKillRegState(Op1IsKill))
- .addReg(AArch64::XZR, getKillRegState(true));
-
- return ResultReg;
+ return fastEmitInst_rrr(AArch64::SMADDLrrr, &AArch64::GPR64RegClass,
+ Op0, Op0IsKill, Op1, Op1IsKill,
+ AArch64::XZR, /*IsKill=*/true);
}
unsigned AArch64FastISel::Emit_UMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
if (RetVT != MVT::i64)
return 0;
- // Create the base instruction, then add the operands.
- unsigned ResultReg = createResultReg(&AArch64::GPR64RegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::UMADDLrrr),
- ResultReg)
- .addReg(Op0, getKillRegState(Op0IsKill))
- .addReg(Op1, getKillRegState(Op1IsKill))
- .addReg(AArch64::XZR, getKillRegState(true));
-
- return ResultReg;
+ return fastEmitInst_rrr(AArch64::UMADDLrrr, &AArch64::GPR64RegClass,
+ Op0, Op0IsKill, Op1, Op1IsKill,
+ AArch64::XZR, /*IsKill=*/true);
}
-unsigned AArch64FastISel::Emit_LSL_ri(MVT RetVT, unsigned Op0, bool Op0IsKill,
- uint64_t Shift) {
- unsigned Opc, ImmR, ImmS;
+unsigned AArch64FastISel::emitLSL_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
+ unsigned Op1Reg, bool Op1IsKill) {
+ unsigned Opc = 0;
+ bool NeedTrunc = false;
+ uint64_t Mask = 0;
switch (RetVT.SimpleTy) {
default: return 0;
- case MVT::i8:
- Opc = AArch64::UBFMWri; ImmR = -Shift % 32; ImmS = 7 - Shift; break;
- case MVT::i16:
- Opc = AArch64::UBFMWri; ImmR = -Shift % 32; ImmS = 15 - Shift; break;
- case MVT::i32:
- Opc = AArch64::UBFMWri; ImmR = -Shift % 32; ImmS = 31 - Shift; break;
- case MVT::i64:
- Opc = AArch64::UBFMXri; ImmR = -Shift % 64; ImmS = 63 - Shift; break;
- }
+ case MVT::i8: Opc = AArch64::LSLVWr; NeedTrunc = true; Mask = 0xff; break;
+ case MVT::i16: Opc = AArch64::LSLVWr; NeedTrunc = true; Mask = 0xffff; break;
+ case MVT::i32: Opc = AArch64::LSLVWr; break;
+ case MVT::i64: Opc = AArch64::LSLVXr; break;
+ }
+
+ const TargetRegisterClass *RC =
+ (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ if (NeedTrunc) {
+ Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask);
+ Op1IsKill = true;
+ }
+ unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg,
+ Op1IsKill);
+ if (NeedTrunc)
+ ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
+ return ResultReg;
+}
+
+unsigned AArch64FastISel::emitLSL_ri(MVT RetVT, MVT SrcVT, unsigned Op0,
+ bool Op0IsKill, uint64_t Shift,
+ bool IsZext) {
+ assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&
+ "Unexpected source/return type pair.");
+ assert((SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 ||
+ SrcVT == MVT::i64) && "Unexpected source value type.");
+ assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||
+ RetVT == MVT::i64) && "Unexpected return value type.");
+
+ bool Is64Bit = (RetVT == MVT::i64);
+ unsigned RegSize = Is64Bit ? 64 : 32;
+ unsigned DstBits = RetVT.getSizeInBits();
+ unsigned SrcBits = SrcVT.getSizeInBits();
+
+ // Don't deal with undefined shifts.
+ if (Shift >= DstBits)
+ return 0;
- RetVT.SimpleTy = std::max(MVT::i32, RetVT.SimpleTy);
- return FastEmitInst_rii(Opc, TLI.getRegClassFor(RetVT), Op0, Op0IsKill, ImmR,
- ImmS);
+ // For immediate shifts we can fold the zero-/sign-extension into the shift.
+ // {S|U}BFM Wd, Wn, #r, #s
+ // Wd<32+s-r,32-r> = Wn<s:0> when r > s
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = shl i16 %1, 4
+ // Wd<32+7-28,32-28> = Wn<7:0> <- clamp s to 7
+ // 0b1111_1111_1111_1111__1111_1010_1010_0000 sext
+ // 0b0000_0000_0000_0000__0000_0101_0101_0000 sext | zext
+ // 0b0000_0000_0000_0000__0000_1010_1010_0000 zext
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = shl i16 %1, 8
+ // Wd<32+7-24,32-24> = Wn<7:0>
+ // 0b1111_1111_1111_1111__1010_1010_0000_0000 sext
+ // 0b0000_0000_0000_0000__0101_0101_0000_0000 sext | zext
+ // 0b0000_0000_0000_0000__1010_1010_0000_0000 zext
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = shl i16 %1, 12
+ // Wd<32+3-20,32-20> = Wn<3:0>
+ // 0b1111_1111_1111_1111__1010_0000_0000_0000 sext
+ // 0b0000_0000_0000_0000__0101_0000_0000_0000 sext | zext
+ // 0b0000_0000_0000_0000__1010_0000_0000_0000 zext
+
+ unsigned ImmR = RegSize - Shift;
+ // Limit the width to the length of the source type.
+ unsigned ImmS = std::min<unsigned>(SrcBits - 1, DstBits - 1 - Shift);
+ static const unsigned OpcTable[2][2] = {
+ {AArch64::SBFMWri, AArch64::SBFMXri},
+ {AArch64::UBFMWri, AArch64::UBFMXri}
+ };
+ unsigned Opc = OpcTable[IsZext][Is64Bit];
+ const TargetRegisterClass *RC =
+ Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) {
+ unsigned TmpReg = MRI.createVirtualRegister(RC);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(AArch64::SUBREG_TO_REG), TmpReg)
+ .addImm(0)
+ .addReg(Op0, getKillRegState(Op0IsKill))
+ .addImm(AArch64::sub_32);
+ Op0 = TmpReg;
+ Op0IsKill = true;
+ }
+ return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS);
}
-unsigned AArch64FastISel::Emit_LSR_ri(MVT RetVT, unsigned Op0, bool Op0IsKill,
- uint64_t Shift) {
- unsigned Opc, ImmS;
+unsigned AArch64FastISel::emitLSR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
+ unsigned Op1Reg, bool Op1IsKill) {
+ unsigned Opc = 0;
+ bool NeedTrunc = false;
+ uint64_t Mask = 0;
switch (RetVT.SimpleTy) {
default: return 0;
- case MVT::i8: Opc = AArch64::UBFMWri; ImmS = 7; break;
- case MVT::i16: Opc = AArch64::UBFMWri; ImmS = 15; break;
- case MVT::i32: Opc = AArch64::UBFMWri; ImmS = 31; break;
- case MVT::i64: Opc = AArch64::UBFMXri; ImmS = 63; break;
+ case MVT::i8: Opc = AArch64::LSRVWr; NeedTrunc = true; Mask = 0xff; break;
+ case MVT::i16: Opc = AArch64::LSRVWr; NeedTrunc = true; Mask = 0xffff; break;
+ case MVT::i32: Opc = AArch64::LSRVWr; break;
+ case MVT::i64: Opc = AArch64::LSRVXr; break;
+ }
+
+ const TargetRegisterClass *RC =
+ (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ if (NeedTrunc) {
+ Op0Reg = emitAnd_ri(MVT::i32, Op0Reg, Op0IsKill, Mask);
+ Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask);
+ Op0IsKill = Op1IsKill = true;
+ }
+ unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg,
+ Op1IsKill);
+ if (NeedTrunc)
+ ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
+ return ResultReg;
+}
+
+unsigned AArch64FastISel::emitLSR_ri(MVT RetVT, MVT SrcVT, unsigned Op0,
+ bool Op0IsKill, uint64_t Shift,
+ bool IsZExt) {
+ assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&
+ "Unexpected source/return type pair.");
+ assert((SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 ||
+ SrcVT == MVT::i64) && "Unexpected source value type.");
+ assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||
+ RetVT == MVT::i64) && "Unexpected return value type.");
+
+ bool Is64Bit = (RetVT == MVT::i64);
+ unsigned RegSize = Is64Bit ? 64 : 32;
+ unsigned DstBits = RetVT.getSizeInBits();
+ unsigned SrcBits = SrcVT.getSizeInBits();
+
+ // Don't deal with undefined shifts.
+ if (Shift >= DstBits)
+ return 0;
+
+ // For immediate shifts we can fold the zero-/sign-extension into the shift.
+ // {S|U}BFM Wd, Wn, #r, #s
+ // Wd<s-r:0> = Wn<s:r> when r <= s
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = lshr i16 %1, 4
+ // Wd<7-4:0> = Wn<7:4>
+ // 0b0000_0000_0000_0000__0000_1111_1111_1010 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0101 sext | zext
+ // 0b0000_0000_0000_0000__0000_0000_0000_1010 zext
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = lshr i16 %1, 8
+ // Wd<7-7,0> = Wn<7:7>
+ // 0b0000_0000_0000_0000__0000_0000_1111_1111 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = lshr i16 %1, 12
+ // Wd<7-7,0> = Wn<7:7> <- clamp r to 7
+ // 0b0000_0000_0000_0000__0000_0000_0000_1111 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
+
+ if (Shift >= SrcBits && IsZExt)
+ return AArch64MaterializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)),
+ RetVT);
+
+ // It is not possible to fold a sign-extend into the LShr instruction. In this
+ // case emit a sign-extend.
+ if (!IsZExt) {
+ Op0 = EmitIntExt(SrcVT, Op0, RetVT, IsZExt);
+ if (!Op0)
+ return 0;
+ Op0IsKill = true;
+ SrcVT = RetVT;
+ SrcBits = SrcVT.getSizeInBits();
+ IsZExt = true;
}
- RetVT.SimpleTy = std::max(MVT::i32, RetVT.SimpleTy);
- return FastEmitInst_rii(Opc, TLI.getRegClassFor(RetVT), Op0, Op0IsKill, Shift,
- ImmS);
+ unsigned ImmR = std::min<unsigned>(SrcBits - 1, Shift);
+ unsigned ImmS = SrcBits - 1;
+ static const unsigned OpcTable[2][2] = {
+ {AArch64::SBFMWri, AArch64::SBFMXri},
+ {AArch64::UBFMWri, AArch64::UBFMXri}
+ };
+ unsigned Opc = OpcTable[IsZExt][Is64Bit];
+ const TargetRegisterClass *RC =
+ Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) {
+ unsigned TmpReg = MRI.createVirtualRegister(RC);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(AArch64::SUBREG_TO_REG), TmpReg)
+ .addImm(0)
+ .addReg(Op0, getKillRegState(Op0IsKill))
+ .addImm(AArch64::sub_32);
+ Op0 = TmpReg;
+ Op0IsKill = true;
+ }
+ return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS);
}
-unsigned AArch64FastISel::Emit_ASR_ri(MVT RetVT, unsigned Op0, bool Op0IsKill,
- uint64_t Shift) {
- unsigned Opc, ImmS;
+unsigned AArch64FastISel::emitASR_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
+ unsigned Op1Reg, bool Op1IsKill) {
+ unsigned Opc = 0;
+ bool NeedTrunc = false;
+ uint64_t Mask = 0;
switch (RetVT.SimpleTy) {
default: return 0;
- case MVT::i8: Opc = AArch64::SBFMWri; ImmS = 7; break;
- case MVT::i16: Opc = AArch64::SBFMWri; ImmS = 15; break;
- case MVT::i32: Opc = AArch64::SBFMWri; ImmS = 31; break;
- case MVT::i64: Opc = AArch64::SBFMXri; ImmS = 63; break;
- }
+ case MVT::i8: Opc = AArch64::ASRVWr; NeedTrunc = true; Mask = 0xff; break;
+ case MVT::i16: Opc = AArch64::ASRVWr; NeedTrunc = true; Mask = 0xffff; break;
+ case MVT::i32: Opc = AArch64::ASRVWr; break;
+ case MVT::i64: Opc = AArch64::ASRVXr; break;
+ }
+
+ const TargetRegisterClass *RC =
+ (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ if (NeedTrunc) {
+ Op0Reg = EmitIntExt(RetVT, Op0Reg, MVT::i32, /*IsZExt=*/false);
+ Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask);
+ Op0IsKill = Op1IsKill = true;
+ }
+ unsigned ResultReg = fastEmitInst_rr(Opc, RC, Op0Reg, Op0IsKill, Op1Reg,
+ Op1IsKill);
+ if (NeedTrunc)
+ ResultReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, Mask);
+ return ResultReg;
+}
+
+unsigned AArch64FastISel::emitASR_ri(MVT RetVT, MVT SrcVT, unsigned Op0,
+ bool Op0IsKill, uint64_t Shift,
+ bool IsZExt) {
+ assert(RetVT.SimpleTy >= SrcVT.SimpleTy &&
+ "Unexpected source/return type pair.");
+ assert((SrcVT == MVT::i8 || SrcVT == MVT::i16 || SrcVT == MVT::i32 ||
+ SrcVT == MVT::i64) && "Unexpected source value type.");
+ assert((RetVT == MVT::i8 || RetVT == MVT::i16 || RetVT == MVT::i32 ||
+ RetVT == MVT::i64) && "Unexpected return value type.");
+
+ bool Is64Bit = (RetVT == MVT::i64);
+ unsigned RegSize = Is64Bit ? 64 : 32;
+ unsigned DstBits = RetVT.getSizeInBits();
+ unsigned SrcBits = SrcVT.getSizeInBits();
+
+ // Don't deal with undefined shifts.
+ if (Shift >= DstBits)
+ return 0;
- RetVT.SimpleTy = std::max(MVT::i32, RetVT.SimpleTy);
- return FastEmitInst_rii(Opc, TLI.getRegClassFor(RetVT), Op0, Op0IsKill, Shift,
- ImmS);
+ // For immediate shifts we can fold the zero-/sign-extension into the shift.
+ // {S|U}BFM Wd, Wn, #r, #s
+ // Wd<s-r:0> = Wn<s:r> when r <= s
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = ashr i16 %1, 4
+ // Wd<7-4:0> = Wn<7:4>
+ // 0b1111_1111_1111_1111__1111_1111_1111_1010 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0101 sext | zext
+ // 0b0000_0000_0000_0000__0000_0000_0000_1010 zext
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = ashr i16 %1, 8
+ // Wd<7-7,0> = Wn<7:7>
+ // 0b1111_1111_1111_1111__1111_1111_1111_1111 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
+
+ // %1 = {s|z}ext i8 {0b1010_1010|0b0101_0101} to i16
+ // %2 = ashr i16 %1, 12
+ // Wd<7-7,0> = Wn<7:7> <- clamp r to 7
+ // 0b1111_1111_1111_1111__1111_1111_1111_1111 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0000 sext
+ // 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
+
+ if (Shift >= SrcBits && IsZExt)
+ return AArch64MaterializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)),
+ RetVT);
+
+ unsigned ImmR = std::min<unsigned>(SrcBits - 1, Shift);
+ unsigned ImmS = SrcBits - 1;
+ static const unsigned OpcTable[2][2] = {
+ {AArch64::SBFMWri, AArch64::SBFMXri},
+ {AArch64::UBFMWri, AArch64::UBFMXri}
+ };
+ unsigned Opc = OpcTable[IsZExt][Is64Bit];
+ const TargetRegisterClass *RC =
+ Is64Bit ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ if (SrcVT.SimpleTy <= MVT::i32 && RetVT == MVT::i64) {
+ unsigned TmpReg = MRI.createVirtualRegister(RC);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(AArch64::SUBREG_TO_REG), TmpReg)
+ .addImm(0)
+ .addReg(Op0, getKillRegState(Op0IsKill))
+ .addImm(AArch64::sub_32);
+ Op0 = TmpReg;
+ Op0IsKill = true;
+ }
+ return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS);
}
unsigned AArch64FastISel::EmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT,
SrcReg = Src64;
}
- unsigned ResultReg = createResultReg(TLI.getRegClassFor(DestVT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc), ResultReg)
- .addReg(SrcReg)
- .addImm(0)
- .addImm(Imm);
-
- return ResultReg;
+ const TargetRegisterClass *RC =
+ (DestVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ return fastEmitInst_rii(Opc, RC, SrcReg, /*TODO:IsKill=*/false, 0, Imm);
}
bool AArch64FastISel::SelectIntExt(const Instruction *I) {
if (!ResultReg)
return false;
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
unsigned Src0Reg = getRegForValue(I->getOperand(0));
if (!Src0Reg)
return false;
+ bool Src0IsKill = hasTrivialKill(I->getOperand(0));
unsigned Src1Reg = getRegForValue(I->getOperand(1));
if (!Src1Reg)
return false;
+ bool Src1IsKill = hasTrivialKill(I->getOperand(1));
- unsigned QuotReg = createResultReg(TLI.getRegClassFor(DestVT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(DivOpc), QuotReg)
- .addReg(Src0Reg)
- .addReg(Src1Reg);
+ const TargetRegisterClass *RC =
+ (DestVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
+ unsigned QuotReg = fastEmitInst_rr(DivOpc, RC, Src0Reg, /*IsKill=*/false,
+ Src1Reg, /*IsKill=*/false);
+ assert(QuotReg && "Unexpected DIV instruction emission failure.");
// The remainder is computed as numerator - (quotient * denominator) using the
// MSUB instruction.
- unsigned ResultReg = createResultReg(TLI.getRegClassFor(DestVT));
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(MSubOpc), ResultReg)
- .addReg(QuotReg)
- .addReg(Src1Reg)
- .addReg(Src0Reg);
- UpdateValueMap(I, ResultReg);
+ unsigned ResultReg = fastEmitInst_rrr(MSubOpc, RC, QuotReg, /*IsKill=*/true,
+ Src1Reg, Src1IsKill, Src0Reg,
+ Src0IsKill);
+ updateValueMap(I, ResultReg);
return true;
}
if (!ResultReg)
return false;
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
-bool AArch64FastISel::SelectShift(const Instruction *I, bool IsLeftShift,
- bool IsArithmetic) {
- EVT RetEVT = TLI.getValueType(I->getType(), true);
- if (!RetEVT.isSimple())
+bool AArch64FastISel::SelectShift(const Instruction *I) {
+ MVT RetVT;
+ if (!isTypeSupported(I->getType(), RetVT))
return false;
- MVT RetVT = RetEVT.getSimpleVT();
- if (!isa<ConstantInt>(I->getOperand(1)))
- return false;
+ if (const auto *C = dyn_cast<ConstantInt>(I->getOperand(1))) {
+ unsigned ResultReg = 0;
+ uint64_t ShiftVal = C->getZExtValue();
+ MVT SrcVT = RetVT;
+ bool IsZExt = (I->getOpcode() == Instruction::AShr) ? false : true;
+ const Value *Op0 = I->getOperand(0);
+ if (const auto *ZExt = dyn_cast<ZExtInst>(Op0)) {
+ MVT TmpVT;
+ if (isValueAvailable(ZExt) && isTypeSupported(ZExt->getSrcTy(), TmpVT)) {
+ SrcVT = TmpVT;
+ IsZExt = true;
+ Op0 = ZExt->getOperand(0);
+ }
+ } else if (const auto *SExt = dyn_cast<SExtInst>(Op0)) {
+ MVT TmpVT;
+ if (isValueAvailable(SExt) && isTypeSupported(SExt->getSrcTy(), TmpVT)) {
+ SrcVT = TmpVT;
+ IsZExt = false;
+ Op0 = SExt->getOperand(0);
+ }
+ }
+
+ unsigned Op0Reg = getRegForValue(Op0);
+ if (!Op0Reg)
+ return false;
+ bool Op0IsKill = hasTrivialKill(Op0);
+
+ switch (I->getOpcode()) {
+ default: llvm_unreachable("Unexpected instruction.");
+ case Instruction::Shl:
+ ResultReg = emitLSL_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt);
+ break;
+ case Instruction::AShr:
+ ResultReg = emitASR_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt);
+ break;
+ case Instruction::LShr:
+ ResultReg = emitLSR_ri(RetVT, SrcVT, Op0Reg, Op0IsKill, ShiftVal, IsZExt);
+ break;
+ }
+ if (!ResultReg)
+ return false;
+
+ updateValueMap(I, ResultReg);
+ return true;
+ }
unsigned Op0Reg = getRegForValue(I->getOperand(0));
if (!Op0Reg)
return false;
bool Op0IsKill = hasTrivialKill(I->getOperand(0));
- uint64_t ShiftVal = cast<ConstantInt>(I->getOperand(1))->getZExtValue();
+ unsigned Op1Reg = getRegForValue(I->getOperand(1));
+ if (!Op1Reg)
+ return false;
+ bool Op1IsKill = hasTrivialKill(I->getOperand(1));
- unsigned ResultReg;
- if (IsLeftShift)
- ResultReg = Emit_LSL_ri(RetVT, Op0Reg, Op0IsKill, ShiftVal);
- else {
- if (IsArithmetic)
- ResultReg = Emit_ASR_ri(RetVT, Op0Reg, Op0IsKill, ShiftVal);
- else
- ResultReg = Emit_LSR_ri(RetVT, Op0Reg, Op0IsKill, ShiftVal);
+ unsigned ResultReg = 0;
+ switch (I->getOpcode()) {
+ default: llvm_unreachable("Unexpected instruction.");
+ case Instruction::Shl:
+ ResultReg = emitLSL_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill);
+ break;
+ case Instruction::AShr:
+ ResultReg = emitASR_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill);
+ break;
+ case Instruction::LShr:
+ ResultReg = emitLSR_rr(RetVT, Op0Reg, Op0IsKill, Op1Reg, Op1IsKill);
+ break;
}
if (!ResultReg)
return false;
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
else
return false;
+ const TargetRegisterClass *RC = nullptr;
+ switch (RetVT.SimpleTy) {
+ default: llvm_unreachable("Unexpected value type.");
+ case MVT::i32: RC = &AArch64::GPR32RegClass; break;
+ case MVT::i64: RC = &AArch64::GPR64RegClass; break;
+ case MVT::f32: RC = &AArch64::FPR32RegClass; break;
+ case MVT::f64: RC = &AArch64::FPR64RegClass; break;
+ }
unsigned Op0Reg = getRegForValue(I->getOperand(0));
if (!Op0Reg)
return false;
bool Op0IsKill = hasTrivialKill(I->getOperand(0));
- unsigned ResultReg = FastEmitInst_r(Opc, TLI.getRegClassFor(RetVT),
- Op0Reg, Op0IsKill);
+ unsigned ResultReg = fastEmitInst_r(Opc, RC, Op0Reg, Op0IsKill);
if (!ResultReg)
return false;
- UpdateValueMap(I, ResultReg);
+ updateValueMap(I, ResultReg);
return true;
}
-bool AArch64FastISel::TargetSelectInstruction(const Instruction *I) {
+bool AArch64FastISel::fastSelectInstruction(const Instruction *I) {
switch (I->getOpcode()) {
default:
break;
- case Instruction::Load:
- return SelectLoad(I);
- case Instruction::Store:
- return SelectStore(I);
+ case Instruction::Add:
+ case Instruction::Sub:
+ if (selectAddSub(I))
+ return true;
+ break;
+ case Instruction::Mul:
+ if (!selectBinaryOp(I, ISD::MUL))
+ return SelectMul(I);
+ return true;
+ case Instruction::SRem:
+ if (!selectBinaryOp(I, ISD::SREM))
+ return SelectRem(I, ISD::SREM);
+ return true;
+ case Instruction::URem:
+ if (!selectBinaryOp(I, ISD::UREM))
+ return SelectRem(I, ISD::UREM);
+ return true;
+ case Instruction::Shl:
+ case Instruction::LShr:
+ case Instruction::AShr:
+ if (SelectShift(I))
+ return true;
+ break;
+ case Instruction::And:
+ case Instruction::Or:
+ case Instruction::Xor:
+ if (selectLogicalOp(I))
+ return true;
+ break;
case Instruction::Br:
return SelectBranch(I);
case Instruction::IndirectBr:
return SelectIndirectBr(I);
- case Instruction::FCmp:
- case Instruction::ICmp:
- return SelectCmp(I);
- case Instruction::Select:
- return SelectSelect(I);
+ case Instruction::BitCast:
+ if (!FastISel::selectBitCast(I))
+ return SelectBitCast(I);
+ return true;
+ case Instruction::FPToSI:
+ if (!selectCast(I, ISD::FP_TO_SINT))
+ return SelectFPToInt(I, /*Signed=*/true);
+ return true;
+ case Instruction::FPToUI:
+ return SelectFPToInt(I, /*Signed=*/false);
+ case Instruction::ZExt:
+ if (!selectCast(I, ISD::ZERO_EXTEND))
+ return SelectIntExt(I);
+ return true;
+ case Instruction::SExt:
+ if (!selectCast(I, ISD::SIGN_EXTEND))
+ return SelectIntExt(I);
+ return true;
+ case Instruction::Trunc:
+ if (!selectCast(I, ISD::TRUNCATE))
+ return SelectTrunc(I);
+ return true;
case Instruction::FPExt:
return SelectFPExt(I);
case Instruction::FPTrunc:
return SelectFPTrunc(I);
- case Instruction::FPToSI:
- return SelectFPToInt(I, /*Signed=*/true);
- case Instruction::FPToUI:
- return SelectFPToInt(I, /*Signed=*/false);
case Instruction::SIToFP:
- return SelectIntToFP(I, /*Signed=*/true);
+ if (!selectCast(I, ISD::SINT_TO_FP))
+ return SelectIntToFP(I, /*Signed=*/true);
+ return true;
case Instruction::UIToFP:
return SelectIntToFP(I, /*Signed=*/false);
- case Instruction::SRem:
- return SelectRem(I, ISD::SREM);
- case Instruction::URem:
- return SelectRem(I, ISD::UREM);
+ case Instruction::Load:
+ return SelectLoad(I);
+ case Instruction::Store:
+ return SelectStore(I);
+ case Instruction::FCmp:
+ case Instruction::ICmp:
+ return SelectCmp(I);
+ case Instruction::Select:
+ return SelectSelect(I);
case Instruction::Ret:
return SelectRet(I);
- case Instruction::Trunc:
- return SelectTrunc(I);
- case Instruction::ZExt:
- case Instruction::SExt:
- return SelectIntExt(I);
-
- // FIXME: All of these should really be handled by the target-independent
- // selector -> improve FastISel tblgen.
- case Instruction::Mul:
- return SelectMul(I);
- case Instruction::Shl:
- return SelectShift(I, /*IsLeftShift=*/true, /*IsArithmetic=*/false);
- case Instruction::LShr:
- return SelectShift(I, /*IsLeftShift=*/false, /*IsArithmetic=*/false);
- case Instruction::AShr:
- return SelectShift(I, /*IsLeftShift=*/false, /*IsArithmetic=*/true);
- case Instruction::BitCast:
- return SelectBitCast(I);
}
- return false;
+
+ // fall-back to target-independent instruction selection.
+ return selectOperator(I, I->getOpcode());
// Silence warnings.
(void)&CC_AArch64_DarwinPCS_VarArg;
}
projects / oota-llvm.git / blobdiff