namespace {
-class AArch64FastISel : public FastISel {
+class AArch64FastISel final : public FastISel {
class Address {
public:
typedef enum {
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) {
// 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 SelectIndirectBr(const Instruction *I);
- bool SelectCmp(const Instruction *I);
- bool SelectSelect(const Instruction *I);
- bool SelectFPExt(const Instruction *I);
- bool SelectFPTrunc(const Instruction *I);
- bool SelectFPToInt(const Instruction *I, bool Signed);
- bool SelectIntToFP(const Instruction *I, bool Signed);
- bool SelectRem(const Instruction *I, unsigned ISDOpcode);
- bool SelectRet(const Instruction *I);
- bool SelectTrunc(const Instruction *I);
- bool SelectIntExt(const Instruction *I);
- bool SelectMul(const Instruction *I);
- bool SelectShift(const Instruction *I);
- bool SelectBitCast(const Instruction *I);
+ bool selectLoad(const Instruction *I);
+ bool selectStore(const Instruction *I);
+ bool selectBranch(const Instruction *I);
+ bool selectIndirectBr(const Instruction *I);
+ bool selectCmp(const Instruction *I);
+ bool selectSelect(const Instruction *I);
+ bool selectFPExt(const Instruction *I);
+ bool selectFPTrunc(const Instruction *I);
+ bool selectFPToInt(const Instruction *I, bool Signed);
+ bool selectIntToFP(const Instruction *I, bool Signed);
+ bool selectRem(const Instruction *I, unsigned ISDOpcode);
+ bool selectRet(const Instruction *I);
+ bool selectTrunc(const Instruction *I);
+ bool selectIntExt(const Instruction *I);
+ bool selectMul(const Instruction *I);
+ bool selectShift(const Instruction *I);
+ bool selectBitCast(const Instruction *I);
bool selectFRem(const Instruction *I);
+ bool selectSDiv(const Instruction *I);
+ bool selectGetElementPtr(const Instruction *I);
// Utility helper routines.
bool isTypeLegal(Type *Ty, MVT &VT);
bool isTypeSupported(Type *Ty, MVT &VT, bool IsVectorAllowed = false);
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);
- void AddLoadStoreOperands(Address &Addr, const MachineInstrBuilder &MIB,
+ bool computeAddress(const Value *Obj, Address &Addr, Type *Ty = nullptr);
+ bool computeCallAddress(const Value *V, Address &Addr);
+ bool simplifyAddress(Address &Addr, MVT VT);
+ void addLoadStoreOperands(Address &Addr, const MachineInstrBuilder &MIB,
unsigned Flags, unsigned ScaleFactor,
MachineMemOperand *MMO);
- bool IsMemCpySmall(uint64_t Len, unsigned Alignment);
- bool TryEmitSmallMemCpy(Address Dest, Address Src, uint64_t Len,
+ bool isMemCpySmall(uint64_t Len, unsigned Alignment);
+ bool tryEmitSmallMemCpy(Address Dest, Address Src, uint64_t Len,
unsigned Alignment);
bool foldXALUIntrinsic(AArch64CC::CondCode &CC, const Instruction *I,
const Value *Cond);
+ bool optimizeIntExtLoad(const Instruction *I, MVT RetVT, MVT SrcVT);
// Emit helper routines.
unsigned emitAddSub(bool UseAdd, MVT RetVT, const Value *LHS,
bool WantResult = true);
// Emit functions.
+ bool emitCompareAndBranch(const BranchInst *BI);
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,
+ unsigned emitLoad(MVT VT, MVT ResultVT, Address Addr, bool WantZExt = true,
+ 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 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 emitAdd_ri_(MVT VT, unsigned Op0, bool Op0IsKill, int64_t Imm);
unsigned emitSub(MVT RetVT, const Value *LHS, const Value *RHS,
bool SetFlags = false, bool WantResult = true,
bool IsZExt = false);
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 emitMul_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
+ unsigned Op1, bool Op1IsKill);
+ unsigned emitSMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
+ unsigned Op1, bool Op1IsKill);
+ unsigned emitUMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
+ unsigned Op1, bool Op1IsKill);
unsigned emitLSL_rr(MVT RetVT, unsigned Op0Reg, bool Op0IsKill,
unsigned Op1Reg, bool Op1IsKill);
unsigned emitLSL_ri(MVT RetVT, MVT SrcVT, unsigned Op0Reg, bool Op0IsKill,
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);
- unsigned AArch64MaterializeGV(const GlobalValue *GV);
+ unsigned materializeInt(const ConstantInt *CI, MVT VT);
+ unsigned materializeFP(const ConstantFP *CFP, MVT VT);
+ unsigned materializeGV(const GlobalValue *GV);
// Call handling routines.
private:
CCAssignFn *CCAssignFnForCall(CallingConv::ID CC) const;
- bool ProcessCallArgs(CallLoweringInfo &CLI, SmallVectorImpl<MVT> &ArgVTs,
+ bool processCallArgs(CallLoweringInfo &CLI, SmallVectorImpl<MVT> &ArgVTs,
unsigned &NumBytes);
- bool FinishCall(CallLoweringInfo &CLI, MVT RetVT, unsigned NumBytes);
+ bool finishCall(CallLoweringInfo &CLI, MVT RetVT, unsigned NumBytes);
public:
// Backend specific FastISel code.
#include "AArch64GenCallingConv.inc"
+/// \brief Check if the sign-/zero-extend will be a noop.
+static bool isIntExtFree(const Instruction *I) {
+ assert((isa<ZExtInst>(I) || isa<SExtInst>(I)) &&
+ "Unexpected integer extend instruction.");
+ assert(!I->getType()->isVectorTy() && I->getType()->isIntegerTy() &&
+ "Unexpected value type.");
+ bool IsZExt = isa<ZExtInst>(I);
+
+ if (const auto *LI = dyn_cast<LoadInst>(I->getOperand(0)))
+ if (LI->hasOneUse())
+ return true;
+
+ if (const auto *Arg = dyn_cast<Argument>(I->getOperand(0)))
+ if ((IsZExt && Arg->hasZExtAttr()) || (!IsZExt && Arg->hasSExtAttr()))
+ return true;
+
+ return false;
+}
+
+/// \brief Determine the implicit scale factor that is applied by a memory
+/// operation for a given value type.
+static unsigned getImplicitScaleFactor(MVT VT) {
+ switch (VT.SimpleTy) {
+ default:
+ return 0; // invalid
+ case MVT::i1: // fall-through
+ case MVT::i8:
+ return 1;
+ case MVT::i16:
+ return 2;
+ case MVT::i32: // fall-through
+ case MVT::f32:
+ return 4;
+ case MVT::i64: // fall-through
+ case MVT::f64:
+ return 8;
+ }
+}
+
CCAssignFn *AArch64FastISel::CCAssignFnForCall(CallingConv::ID CC) const {
if (CC == CallingConv::WebKit_JS)
return CC_AArch64_WebKit_JS;
return 0;
}
-unsigned AArch64FastISel::AArch64MaterializeInt(const ConstantInt *CI, MVT VT) {
+unsigned AArch64FastISel::materializeInt(const ConstantInt *CI, MVT VT) {
if (VT > MVT::i64)
return 0;
return ResultReg;
}
-unsigned AArch64FastISel::AArch64MaterializeFP(const ConstantFP *CFP, MVT VT) {
+unsigned AArch64FastISel::materializeFP(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 ResultReg;
}
-unsigned AArch64FastISel::AArch64MaterializeGV(const GlobalValue *GV) {
+unsigned AArch64FastISel::materializeGV(const GlobalValue *GV) {
// We can't handle thread-local variables quickly yet.
if (GV->isThreadLocal())
return 0;
MVT VT = CEVT.getSimpleVT();
if (const auto *CI = dyn_cast<ConstantInt>(C))
- return AArch64MaterializeInt(CI, VT);
+ return materializeInt(CI, VT);
else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C))
- return AArch64MaterializeFP(CFP, VT);
+ return materializeFP(CFP, VT);
else if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
- return AArch64MaterializeGV(GV);
+ return materializeGV(GV);
return 0;
}
return fastEmitInst_r(Opc, TLI.getRegClassFor(VT), ZReg, /*IsKill=*/true);
}
+/// \brief Check if the multiply is by a power-of-2 constant.
+static bool isMulPowOf2(const Value *I) {
+ if (const auto *MI = dyn_cast<MulOperator>(I)) {
+ if (const auto *C = dyn_cast<ConstantInt>(MI->getOperand(0)))
+ if (C->getValue().isPowerOf2())
+ return true;
+ if (const auto *C = dyn_cast<ConstantInt>(MI->getOperand(1)))
+ if (C->getValue().isPowerOf2())
+ return true;
+ }
+ return false;
+}
+
// Computes the address to get to an object.
-bool AArch64FastISel::ComputeAddress(const Value *Obj, Address &Addr, Type *Ty)
+bool AArch64FastISel::computeAddress(const Value *Obj, Address &Addr, Type *Ty)
{
const User *U = nullptr;
unsigned Opcode = Instruction::UserOp1;
break;
case Instruction::BitCast: {
// Look through bitcasts.
- return ComputeAddress(U->getOperand(0), Addr, Ty);
+ 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, Ty);
+ 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, Ty);
+ 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, Ty))
+ if (computeAddress(U->getOperand(0), Addr, Ty))
return true;
// We failed, restore everything and try the other options.
std::swap(LHS, RHS);
if (const ConstantInt *CI = dyn_cast<ConstantInt>(RHS)) {
- Addr.setOffset(Addr.getOffset() + (uint64_t)CI->getSExtValue());
- return ComputeAddress(LHS, Addr, Ty);
+ Addr.setOffset(Addr.getOffset() + CI->getSExtValue());
+ return computeAddress(LHS, Addr, Ty);
}
Address Backup = Addr;
- if (ComputeAddress(LHS, Addr, Ty) && ComputeAddress(RHS, Addr, Ty))
+ if (computeAddress(LHS, Addr, Ty) && computeAddress(RHS, Addr, Ty))
return true;
Addr = Backup;
break;
}
- case Instruction::Shl:
+ case Instruction::Sub: {
+ // Subs of constants are common and easy enough.
+ const Value *LHS = U->getOperand(0);
+ const Value *RHS = U->getOperand(1);
+
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(RHS)) {
+ Addr.setOffset(Addr.getOffset() - CI->getSExtValue());
+ return computeAddress(LHS, Addr, Ty);
+ }
+ 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;
+ const auto *CI = dyn_cast<ConstantInt>(U->getOperand(1));
+ if (!CI)
+ break;
- uint64_t NumBytes = 0;
- if (Ty && Ty->isSized()) {
- uint64_t NumBits = DL.getTypeSizeInBits(Ty);
- NumBytes = NumBits / 8;
- if (!isPowerOf2_64(NumBits))
- NumBytes = 0;
- }
+ unsigned Val = CI->getZExtValue();
+ if (Val < 1 || Val > 3)
+ break;
- if (NumBytes != (1ULL << Val))
- 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 != (1ULL << Val))
+ break;
- Addr.setShift(Val);
- Addr.setExtendType(AArch64_AM::LSL);
+ 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;
+ const Value *Src = U->getOperand(0);
+ if (const auto *I = dyn_cast<Instruction>(Src))
+ if (FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB)
+ Src = I;
- if (const auto *ZE = dyn_cast<ZExtInst>(U))
- if (ZE->getOperand(0)->getType()->isIntegerTy(32))
+ // Fold the zext or sext when it won't become a noop.
+ if (const auto *ZE = dyn_cast<ZExtInst>(Src)) {
+ if (!isIntExtFree(ZE) && ZE->getOperand(0)->getType()->isIntegerTy(32)) {
Addr.setExtendType(AArch64_AM::UXTW);
+ Src = ZE->getOperand(0);
+ }
+ } else if (const auto *SE = dyn_cast<SExtInst>(Src)) {
+ if (!isIntExtFree(SE) && SE->getOperand(0)->getType()->isIntegerTy(32)) {
+ Addr.setExtendType(AArch64_AM::SXTW);
+ Src = SE->getOperand(0);
+ }
+ }
- if (const auto *SE = dyn_cast<SExtInst>(U))
- if (SE->getOperand(0)->getType()->isIntegerTy(32))
- Addr.setExtendType(AArch64_AM::SXTW);
+ if (const auto *AI = dyn_cast<BinaryOperator>(Src))
+ if (AI->getOpcode() == Instruction::And) {
+ const Value *LHS = AI->getOperand(0);
+ const Value *RHS = AI->getOperand(1);
+
+ if (const auto *C = dyn_cast<ConstantInt>(LHS))
+ if (C->getValue() == 0xffffffff)
+ std::swap(LHS, RHS);
+
+ if (const auto *C = dyn_cast<ConstantInt>(RHS))
+ if (C->getValue() == 0xffffffff) {
+ Addr.setExtendType(AArch64_AM::UXTW);
+ unsigned Reg = getRegForValue(LHS);
+ if (!Reg)
+ return false;
+ bool RegIsKill = hasTrivialKill(LHS);
+ Reg = fastEmitInst_extractsubreg(MVT::i32, Reg, RegIsKill,
+ AArch64::sub_32);
+ Addr.setOffsetReg(Reg);
+ return true;
+ }
+ }
- unsigned Reg = getRegForValue(U->getOperand(0));
- if (!Reg)
- return false;
- Addr.setOffsetReg(Reg);
- return true;
+ unsigned Reg = getRegForValue(Src);
+ if (!Reg)
+ return false;
+ Addr.setOffsetReg(Reg);
+ return true;
+ }
+ case Instruction::Mul: {
+ if (Addr.getOffsetReg())
+ break;
+
+ if (!isMulPowOf2(U))
+ break;
+
+ const Value *LHS = U->getOperand(0);
+ const Value *RHS = U->getOperand(1);
+
+ // Canonicalize power-of-2 value to the RHS.
+ if (const auto *C = dyn_cast<ConstantInt>(LHS))
+ if (C->getValue().isPowerOf2())
+ std::swap(LHS, RHS);
+
+ assert(isa<ConstantInt>(RHS) && "Expected an ConstantInt.");
+ const auto *C = cast<ConstantInt>(RHS);
+ unsigned Val = C->getValue().logBase2();
+ 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 != (1ULL << Val))
+ break;
+
+ Addr.setShift(Val);
+ Addr.setExtendType(AArch64_AM::LSL);
+
+ const Value *Src = LHS;
+ if (const auto *I = dyn_cast<Instruction>(Src))
+ if (FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB)
+ Src = I;
+
+
+ // Fold the zext or sext when it won't become a noop.
+ if (const auto *ZE = dyn_cast<ZExtInst>(Src)) {
+ if (!isIntExtFree(ZE) && ZE->getOperand(0)->getType()->isIntegerTy(32)) {
+ Addr.setExtendType(AArch64_AM::UXTW);
+ Src = ZE->getOperand(0);
+ }
+ } else if (const auto *SE = dyn_cast<SExtInst>(Src)) {
+ if (!isIntExtFree(SE) && SE->getOperand(0)->getType()->isIntegerTy(32)) {
+ Addr.setExtendType(AArch64_AM::SXTW);
+ Src = SE->getOperand(0);
+ }
+ }
+
+ unsigned Reg = getRegForValue(Src);
+ if (!Reg)
+ return false;
+ Addr.setOffsetReg(Reg);
+ return true;
+ }
+ case Instruction::And: {
+ if (Addr.getOffsetReg())
+ break;
+
+ if (DL.getTypeSizeInBits(Ty) != 8)
+ break;
+
+ const Value *LHS = U->getOperand(0);
+ const Value *RHS = U->getOperand(1);
+
+ if (const auto *C = dyn_cast<ConstantInt>(LHS))
+ if (C->getValue() == 0xffffffff)
+ std::swap(LHS, RHS);
+
+ if (const auto *C = dyn_cast<ConstantInt>(RHS))
+ if (C->getValue() == 0xffffffff) {
+ Addr.setShift(0);
+ Addr.setExtendType(AArch64_AM::LSL);
+ Addr.setExtendType(AArch64_AM::UXTW);
+
+ unsigned Reg = getRegForValue(LHS);
+ if (!Reg)
+ return false;
+ bool RegIsKill = hasTrivialKill(LHS);
+ Reg = fastEmitInst_extractsubreg(MVT::i32, Reg, RegIsKill,
+ AArch64::sub_32);
+ Addr.setOffsetReg(Reg);
+ return true;
+ }
break;
}
+ case Instruction::SExt:
+ case Instruction::ZExt: {
+ if (!Addr.getReg() || Addr.getOffsetReg())
+ break;
- if (Addr.getReg()) {
- if (!Addr.getOffsetReg()) {
- unsigned Reg = getRegForValue(Obj);
- if (!Reg)
- return false;
- Addr.setOffsetReg(Reg);
- return true;
+ const Value *Src = nullptr;
+ // Fold the zext or sext when it won't become a noop.
+ if (const auto *ZE = dyn_cast<ZExtInst>(U)) {
+ if (!isIntExtFree(ZE) && ZE->getOperand(0)->getType()->isIntegerTy(32)) {
+ Addr.setExtendType(AArch64_AM::UXTW);
+ Src = ZE->getOperand(0);
+ }
+ } else if (const auto *SE = dyn_cast<SExtInst>(U)) {
+ if (!isIntExtFree(SE) && SE->getOperand(0)->getType()->isIntegerTy(32)) {
+ Addr.setExtendType(AArch64_AM::SXTW);
+ Src = SE->getOperand(0);
+ }
}
- return false;
+
+ if (!Src)
+ break;
+
+ Addr.setShift(0);
+ unsigned Reg = getRegForValue(Src);
+ if (!Reg)
+ return false;
+ Addr.setOffsetReg(Reg);
+ return true;
}
+ } // end switch
- unsigned Reg = getRegForValue(Obj);
- if (!Reg)
- return false;
- Addr.setReg(Reg);
- return true;
+ if (Addr.isRegBase() && !Addr.getReg()) {
+ unsigned Reg = getRegForValue(Obj);
+ if (!Reg)
+ return false;
+ Addr.setReg(Reg);
+ return true;
+ }
+
+ if (!Addr.getOffsetReg()) {
+ unsigned Reg = getRegForValue(Obj);
+ if (!Reg)
+ return false;
+ Addr.setOffsetReg(Reg);
+ return true;
+ }
+
+ return false;
}
-bool AArch64FastISel::ComputeCallAddress(const Value *V, Address &Addr) {
+bool AArch64FastISel::computeCallAddress(const Value *V, Address &Addr) {
const User *U = nullptr;
unsigned Opcode = Instruction::UserOp1;
bool InMBB = true;
case Instruction::BitCast:
// Look past bitcasts if its operand is in the same BB.
if (InMBB)
- return ComputeCallAddress(U->getOperand(0), Addr);
+ return computeCallAddress(U->getOperand(0), Addr);
break;
case Instruction::IntToPtr:
// Look past no-op inttoptrs if its operand is in the same BB.
if (InMBB &&
TLI.getValueType(U->getOperand(0)->getType()) == TLI.getPointerTy())
- return ComputeCallAddress(U->getOperand(0), Addr);
+ return computeCallAddress(U->getOperand(0), Addr);
break;
case Instruction::PtrToInt:
// Look past no-op ptrtoints if its operand is in the same BB.
if (InMBB &&
TLI.getValueType(U->getType()) == TLI.getPointerTy())
- return ComputeCallAddress(U->getOperand(0), Addr);
+ return computeCallAddress(U->getOperand(0), Addr);
break;
}
return false;
}
-bool AArch64FastISel::SimplifyAddress(Address &Addr, MVT VT) {
- unsigned ScaleFactor;
- switch (VT.SimpleTy) {
- 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;
- }
+bool AArch64FastISel::simplifyAddress(Address &Addr, MVT VT) {
+ unsigned ScaleFactor = getImplicitScaleFactor(VT);
+ if (!ScaleFactor)
+ return false;
bool ImmediateOffsetNeedsLowering = false;
bool RegisterOffsetNeedsLowering = false;
// 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())
+ if (!ImmediateOffsetNeedsLowering && Addr.getOffset() && Addr.getOffsetReg())
RegisterOffsetNeedsLowering = true;
// Cannot encode zero register as base.
// 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()) {
+ if ((ImmediateOffsetNeedsLowering || Addr.getOffsetReg()) && Addr.isFIBase())
+ {
unsigned ResultReg = createResultReg(&AArch64::GPR64spRegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADDXri),
ResultReg)
// Since the offset is too large for the load/store instruction get the
// reg+offset into a register.
if (ImmediateOffsetNeedsLowering) {
- unsigned ResultReg = 0;
+ unsigned ResultReg;
if (Addr.getReg())
- ResultReg = fastEmit_ri_(MVT::i64, ISD::ADD, Addr.getReg(),
- /*IsKill=*/false, Offset, MVT::i64);
+ // Try to fold the immediate into the add instruction.
+ ResultReg = emitAdd_ri_(MVT::i64, Addr.getReg(), /*IsKill=*/false, Offset);
else
ResultReg = fastEmit_i(MVT::i64, MVT::i64, ISD::Constant, Offset);
return true;
}
-void AArch64FastISel::AddLoadStoreOperands(Address &Addr,
+void AArch64FastISel::addLoadStoreOperands(Address &Addr,
const MachineInstrBuilder &MIB,
unsigned Flags,
unsigned ScaleFactor,
MIB.addReg(Addr.getOffsetReg());
MIB.addImm(IsSigned);
MIB.addImm(Addr.getShift() != 0);
- } else {
- MIB.addReg(Addr.getReg());
- MIB.addImm(Offset);
- }
+ } else
+ MIB.addReg(Addr.getReg()).addImm(Offset);
}
if (MMO)
if (UseAdd && isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS))
std::swap(LHS, RHS);
+ // Canonicalize mul by power of 2 to the RHS.
+ if (UseAdd && LHS->hasOneUse() && isValueAvailable(LHS))
+ if (isMulPowOf2(LHS))
+ std::swap(LHS, RHS);
+
// Canonicalize shift immediate to the RHS.
- if (UseAdd && isValueAvailable(LHS))
+ if (UseAdd && LHS->hasOneUse() && isValueAvailable(LHS))
if (const auto *SI = dyn_cast<BinaryOperator>(LHS))
if (isa<ConstantInt>(SI->getOperand(1)))
if (SI->getOpcode() == Instruction::Shl ||
bool LHSIsKill = hasTrivialKill(LHS);
if (NeedExtend)
- LHSReg = EmitIntExt(SrcVT, LHSReg, RetVT, IsZExt);
+ LHSReg = emitIntExt(SrcVT, LHSReg, RetVT, IsZExt);
unsigned ResultReg = 0;
if (const auto *C = dyn_cast<ConstantInt>(RHS)) {
return ResultReg;
// Only extend the RHS within the instruction if there is a valid extend type.
- if (ExtendType != AArch64_AM::InvalidShiftExtend && isValueAvailable(RHS)) {
+ if (ExtendType != AArch64_AM::InvalidShiftExtend && RHS->hasOneUse() &&
+ 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)) {
ExtendType, 0, SetFlags, WantResult);
}
+ // Check if the mul can be folded into the instruction.
+ if (RHS->hasOneUse() && isValueAvailable(RHS))
+ if (isMulPowOf2(RHS)) {
+ const Value *MulLHS = cast<MulOperator>(RHS)->getOperand(0);
+ const Value *MulRHS = cast<MulOperator>(RHS)->getOperand(1);
+
+ if (const auto *C = dyn_cast<ConstantInt>(MulLHS))
+ if (C->getValue().isPowerOf2())
+ std::swap(MulLHS, MulRHS);
+
+ assert(isa<ConstantInt>(MulRHS) && "Expected a ConstantInt.");
+ uint64_t ShiftVal = cast<ConstantInt>(MulRHS)->getValue().logBase2();
+ unsigned RHSReg = getRegForValue(MulLHS);
+ if (!RHSReg)
+ return 0;
+ bool RHSIsKill = hasTrivialKill(MulLHS);
+ return emitAddSub_rs(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, RHSIsKill,
+ AArch64_AM::LSL, ShiftVal, SetFlags, WantResult);
+ }
+
// Check if the shift can be folded into the instruction.
- if (isValueAvailable(RHS))
+ if (RHS->hasOneUse() && 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;
bool RHSIsKill = hasTrivialKill(RHS);
if (NeedExtend)
- RHSReg = EmitIntExt(SrcVT, RHSReg, RetVT, IsZExt);
+ RHSReg = emitIntExt(SrcVT, RHSReg, RetVT, IsZExt);
return emitAddSub_rr(UseAdd, RetVT, LHSReg, LHSIsKill, RHSReg, RHSIsKill,
SetFlags, WantResult);
IsZExt);
}
+/// \brief This method is a wrapper to simplify add emission.
+///
+/// First try to emit an add with an immediate operand using emitAddSub_ri. If
+/// that fails, then try to materialize the immediate into a register and use
+/// emitAddSub_rr instead.
+unsigned AArch64FastISel::emitAdd_ri_(MVT VT, unsigned Op0, bool Op0IsKill,
+ int64_t Imm) {
+ unsigned ResultReg;
+ if (Imm < 0)
+ ResultReg = emitAddSub_ri(false, VT, Op0, Op0IsKill, -Imm);
+ else
+ ResultReg = emitAddSub_ri(true, VT, Op0, Op0IsKill, Imm);
+
+ if (ResultReg)
+ return ResultReg;
+
+ unsigned CReg = fastEmit_i(VT, VT, ISD::Constant, Imm);
+ if (!CReg)
+ return 0;
+
+ ResultReg = emitAddSub_rr(true, VT, Op0, Op0IsKill, CReg, true);
+ return ResultReg;
+}
+
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,
if (isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS))
std::swap(LHS, RHS);
+ // Canonicalize mul by power-of-2 to the RHS.
+ if (LHS->hasOneUse() && isValueAvailable(LHS))
+ if (isMulPowOf2(LHS))
+ std::swap(LHS, RHS);
+
// Canonicalize shift immediate to the RHS.
- if (isValueAvailable(LHS))
- if (const auto *SI = dyn_cast<BinaryOperator>(LHS))
+ if (LHS->hasOneUse() && isValueAvailable(LHS))
+ if (const auto *SI = dyn_cast<ShlOperator>(LHS))
if (isa<ConstantInt>(SI->getOperand(1)))
- if (SI->getOpcode() == Instruction::Shl)
- std::swap(LHS, RHS);
+ std::swap(LHS, RHS);
unsigned LHSReg = getRegForValue(LHS);
if (!LHSReg)
if (ResultReg)
return ResultReg;
+ // Check if the mul can be folded into the instruction.
+ if (RHS->hasOneUse() && isValueAvailable(RHS))
+ if (isMulPowOf2(RHS)) {
+ const Value *MulLHS = cast<MulOperator>(RHS)->getOperand(0);
+ const Value *MulRHS = cast<MulOperator>(RHS)->getOperand(1);
+
+ if (const auto *C = dyn_cast<ConstantInt>(MulLHS))
+ if (C->getValue().isPowerOf2())
+ std::swap(MulLHS, MulRHS);
+
+ assert(isa<ConstantInt>(MulRHS) && "Expected a ConstantInt.");
+ uint64_t ShiftVal = cast<ConstantInt>(MulRHS)->getValue().logBase2();
+
+ unsigned RHSReg = getRegForValue(MulLHS);
+ if (!RHSReg)
+ return 0;
+ bool RHSIsKill = hasTrivialKill(MulLHS);
+ return emitLogicalOp_rs(ISDOpc, RetVT, LHSReg, LHSIsKill, RHSReg,
+ RHSIsKill, ShiftVal);
+ }
+
// 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);
- }
+ if (RHS->hasOneUse() && isValueAvailable(RHS))
+ if (const auto *SI = dyn_cast<ShlOperator>(RHS))
+ if (const auto *C = dyn_cast<ConstantInt>(SI->getOperand(1))) {
+ 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 emitLogicalOp_ri(ISD::AND, RetVT, LHSReg, LHSIsKill, Imm);
}
-bool AArch64FastISel::EmitLoad(MVT VT, unsigned &ResultReg, Address Addr,
- MachineMemOperand *MMO) {
+unsigned AArch64FastISel::emitLoad(MVT VT, MVT RetVT, Address Addr,
+ bool WantZExt, MachineMemOperand *MMO) {
// Simplify this down to something we can handle.
- if (!SimplifyAddress(Addr, VT))
- return false;
+ if (!simplifyAddress(Addr, VT))
+ return 0;
- 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;
- }
+ unsigned ScaleFactor = getImplicitScaleFactor(VT);
+ if (!ScaleFactor)
+ llvm_unreachable("Unexpected value type.");
// Negative offsets require unscaled, 9-bit, signed immediate offsets.
// Otherwise, we try using scaled, 12-bit, unsigned immediate offsets.
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 }
+ static const unsigned GPOpcTable[2][8][4] = {
+ // Sign-extend.
+ { { AArch64::LDURSBWi, AArch64::LDURSHWi, AArch64::LDURWi,
+ AArch64::LDURXi },
+ { AArch64::LDURSBXi, AArch64::LDURSHXi, AArch64::LDURSWi,
+ AArch64::LDURXi },
+ { AArch64::LDRSBWui, AArch64::LDRSHWui, AArch64::LDRWui,
+ AArch64::LDRXui },
+ { AArch64::LDRSBXui, AArch64::LDRSHXui, AArch64::LDRSWui,
+ AArch64::LDRXui },
+ { AArch64::LDRSBWroX, AArch64::LDRSHWroX, AArch64::LDRWroX,
+ AArch64::LDRXroX },
+ { AArch64::LDRSBXroX, AArch64::LDRSHXroX, AArch64::LDRSWroX,
+ AArch64::LDRXroX },
+ { AArch64::LDRSBWroW, AArch64::LDRSHWroW, AArch64::LDRWroW,
+ AArch64::LDRXroW },
+ { AArch64::LDRSBXroW, AArch64::LDRSHXroW, AArch64::LDRSWroW,
+ AArch64::LDRXroW }
+ },
+ // Zero-extend.
+ { { AArch64::LDURBBi, AArch64::LDURHHi, AArch64::LDURWi,
+ AArch64::LDURXi },
+ { AArch64::LDURBBi, AArch64::LDURHHi, AArch64::LDURWi,
+ AArch64::LDURXi },
+ { AArch64::LDRBBui, AArch64::LDRHHui, AArch64::LDRWui,
+ AArch64::LDRXui },
+ { AArch64::LDRBBui, AArch64::LDRHHui, AArch64::LDRWui,
+ AArch64::LDRXui },
+ { AArch64::LDRBBroX, AArch64::LDRHHroX, AArch64::LDRWroX,
+ AArch64::LDRXroX },
+ { AArch64::LDRBBroX, AArch64::LDRHHroX, AArch64::LDRWroX,
+ AArch64::LDRXroX },
+ { AArch64::LDRBBroW, AArch64::LDRHHroW, AArch64::LDRWroW,
+ AArch64::LDRXroW },
+ { AArch64::LDRBBroW, AArch64::LDRHHroW, AArch64::LDRWroW,
+ AArch64::LDRXroW }
+ }
+ };
+
+ static const unsigned FPOpcTable[4][2] = {
+ { AArch64::LDURSi, AArch64::LDURDi },
+ { AArch64::LDRSui, AArch64::LDRDui },
+ { AArch64::LDRSroX, AArch64::LDRDroX },
+ { AArch64::LDRSroW, AArch64::LDRDroW }
};
unsigned Opc;
const TargetRegisterClass *RC;
- bool VTIsi1 = false;
bool UseRegOffset = Addr.isRegBase() && !Addr.getOffset() && Addr.getReg() &&
Addr.getOffsetReg();
unsigned Idx = UseRegOffset ? 2 : UseScaled ? 1 : 0;
Addr.getExtendType() == AArch64_AM::SXTW)
Idx++;
+ bool IsRet64Bit = RetVT == MVT::i64;
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;
+ default:
+ llvm_unreachable("Unexpected value type.");
+ case MVT::i1: // Intentional fall-through.
+ case MVT::i8:
+ Opc = GPOpcTable[WantZExt][2 * Idx + IsRet64Bit][0];
+ RC = (IsRet64Bit && !WantZExt) ?
+ &AArch64::GPR64RegClass: &AArch64::GPR32RegClass;
+ break;
+ case MVT::i16:
+ Opc = GPOpcTable[WantZExt][2 * Idx + IsRet64Bit][1];
+ RC = (IsRet64Bit && !WantZExt) ?
+ &AArch64::GPR64RegClass: &AArch64::GPR32RegClass;
+ break;
+ case MVT::i32:
+ Opc = GPOpcTable[WantZExt][2 * Idx + IsRet64Bit][2];
+ RC = (IsRet64Bit && !WantZExt) ?
+ &AArch64::GPR64RegClass: &AArch64::GPR32RegClass;
+ break;
+ case MVT::i64:
+ Opc = GPOpcTable[WantZExt][2 * Idx + IsRet64Bit][3];
+ RC = &AArch64::GPR64RegClass;
+ break;
+ case MVT::f32:
+ Opc = FPOpcTable[Idx][0];
+ RC = &AArch64::FPR32RegClass;
+ break;
+ case MVT::f64:
+ Opc = FPOpcTable[Idx][1];
+ RC = &AArch64::FPR64RegClass;
+ break;
}
// Create the base instruction, then add the operands.
- ResultReg = createResultReg(RC);
+ unsigned ResultReg = createResultReg(RC);
MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
TII.get(Opc), ResultReg);
- AddLoadStoreOperands(Addr, MIB, MachineMemOperand::MOLoad, ScaleFactor, MMO);
+ addLoadStoreOperands(Addr, MIB, MachineMemOperand::MOLoad, ScaleFactor, MMO);
// Loading an i1 requires special handling.
- if (VTIsi1) {
+ if (VT == MVT::i1) {
unsigned ANDReg = emitAnd_ri(MVT::i32, ResultReg, /*IsKill=*/true, 1);
assert(ANDReg && "Unexpected AND instruction emission failure.");
ResultReg = ANDReg;
}
- return true;
+
+ // For zero-extending loads to 64bit we emit a 32bit load and then convert
+ // the 32bit reg to a 64bit reg.
+ if (WantZExt && RetVT == MVT::i64 && VT <= MVT::i32) {
+ unsigned Reg64 = createResultReg(&AArch64::GPR64RegClass);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(AArch64::SUBREG_TO_REG), Reg64)
+ .addImm(0)
+ .addReg(ResultReg, getKillRegState(true))
+ .addImm(AArch64::sub_32);
+ ResultReg = Reg64;
+ }
+ return ResultReg;
}
bool AArch64FastISel::selectAddSub(const Instruction *I) {
return true;
}
-bool AArch64FastISel::SelectLoad(const Instruction *I) {
+bool AArch64FastISel::selectLoad(const Instruction *I) {
MVT VT;
// 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
// See if we can handle this address.
Address Addr;
- if (!ComputeAddress(I->getOperand(0), Addr, I->getType()))
+ if (!computeAddress(I->getOperand(0), Addr, I->getType()))
return false;
- unsigned ResultReg;
- if (!EmitLoad(VT, ResultReg, Addr, createMachineMemOperandFor(I)))
+ // Fold the following sign-/zero-extend into the load instruction.
+ bool WantZExt = true;
+ MVT RetVT = VT;
+ const Value *IntExtVal = nullptr;
+ if (I->hasOneUse()) {
+ if (const auto *ZE = dyn_cast<ZExtInst>(I->use_begin()->getUser())) {
+ if (isTypeSupported(ZE->getType(), RetVT))
+ IntExtVal = ZE;
+ else
+ RetVT = VT;
+ } else if (const auto *SE = dyn_cast<SExtInst>(I->use_begin()->getUser())) {
+ if (isTypeSupported(SE->getType(), RetVT))
+ IntExtVal = SE;
+ else
+ RetVT = VT;
+ WantZExt = false;
+ }
+ }
+
+ unsigned ResultReg =
+ emitLoad(VT, RetVT, Addr, WantZExt, createMachineMemOperandFor(I));
+ if (!ResultReg)
return false;
+ // There are a few different cases we have to handle, because the load or the
+ // sign-/zero-extend might not be selected by FastISel if we fall-back to
+ // SelectionDAG. There is also an ordering issue when both instructions are in
+ // different basic blocks.
+ // 1.) The load instruction is selected by FastISel, but the integer extend
+ // not. This usually happens when the integer extend is in a different
+ // basic block and SelectionDAG took over for that basic block.
+ // 2.) The load instruction is selected before the integer extend. This only
+ // happens when the integer extend is in a different basic block.
+ // 3.) The load instruction is selected by SelectionDAG and the integer extend
+ // by FastISel. This happens if there are instructions between the load
+ // and the integer extend that couldn't be selected by FastISel.
+ if (IntExtVal) {
+ // The integer extend hasn't been emitted yet. FastISel or SelectionDAG
+ // could select it. Emit a copy to subreg if necessary. FastISel will remove
+ // it when it selects the integer extend.
+ unsigned Reg = lookUpRegForValue(IntExtVal);
+ if (!Reg) {
+ if (RetVT == MVT::i64 && VT <= MVT::i32) {
+ if (WantZExt) {
+ // Delete the last emitted instruction from emitLoad (SUBREG_TO_REG).
+ std::prev(FuncInfo.InsertPt)->eraseFromParent();
+ ResultReg = std::prev(FuncInfo.InsertPt)->getOperand(0).getReg();
+ } else
+ ResultReg = fastEmitInst_extractsubreg(MVT::i32, ResultReg,
+ /*IsKill=*/true,
+ AArch64::sub_32);
+ }
+ updateValueMap(I, ResultReg);
+ return true;
+ }
+
+ // The integer extend has already been emitted - delete all the instructions
+ // that have been emitted by the integer extend lowering code and use the
+ // result from the load instruction directly.
+ while (Reg) {
+ auto *MI = MRI.getUniqueVRegDef(Reg);
+ if (!MI)
+ break;
+ Reg = 0;
+ for (auto &Opnd : MI->uses()) {
+ if (Opnd.isReg()) {
+ Reg = Opnd.getReg();
+ break;
+ }
+ }
+ MI->eraseFromParent();
+ }
+ updateValueMap(IntExtVal, ResultReg);
+ return true;
+ }
+
updateValueMap(I, ResultReg);
return true;
}
-bool AArch64FastISel::EmitStore(MVT VT, unsigned SrcReg, Address Addr,
+bool AArch64FastISel::emitStore(MVT VT, unsigned SrcReg, Address Addr,
MachineMemOperand *MMO) {
// Simplify this down to something we can handle.
- if (!SimplifyAddress(Addr, VT))
+ 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;
- }
+ unsigned ScaleFactor = getImplicitScaleFactor(VT);
+ if (!ScaleFactor)
+ llvm_unreachable("Unexpected value type.");
// Negative offsets require unscaled, 9-bit, signed immediate offsets.
// Otherwise, we try using scaled, 12-bit, unsigned immediate offsets.
ScaleFactor = 1;
}
-
static const unsigned OpcTable[4][6] = {
{ AArch64::STURBBi, AArch64::STURHHi, AArch64::STURWi, AArch64::STURXi,
AArch64::STURSi, AArch64::STURDi },
AArch64::STRSroX, AArch64::STRDroX },
{ AArch64::STRBBroW, AArch64::STRHHroW, AArch64::STRWroW, AArch64::STRXroW,
AArch64::STRSroW, AArch64::STRDroW }
-
};
unsigned 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);
+ addLoadStoreOperands(Addr, MIB, MachineMemOperand::MOStore, ScaleFactor, MMO);
return true;
}
-bool AArch64FastISel::SelectStore(const Instruction *I) {
+bool AArch64FastISel::selectStore(const Instruction *I) {
MVT VT;
const Value *Op0 = I->getOperand(0);
// Verify we have a legal type before going any further. Currently, we handle
// See if we can handle this address.
Address Addr;
- if (!ComputeAddress(I->getOperand(1), Addr, I->getOperand(0)->getType()))
+ if (!computeAddress(I->getOperand(1), Addr, I->getOperand(0)->getType()))
return false;
- if (!EmitStore(VT, SrcReg, Addr, createMachineMemOperandFor(I)))
+ if (!emitStore(VT, SrcReg, Addr, createMachineMemOperandFor(I)))
return false;
return true;
}
}
}
-bool AArch64FastISel::SelectBranch(const Instruction *I) {
+/// \brief Try to emit a combined compare-and-branch instruction.
+bool AArch64FastISel::emitCompareAndBranch(const BranchInst *BI) {
+ assert(isa<CmpInst>(BI->getCondition()) && "Expected cmp instruction");
+ const CmpInst *CI = cast<CmpInst>(BI->getCondition());
+ CmpInst::Predicate Predicate = optimizeCmpPredicate(CI);
+
+ const Value *LHS = CI->getOperand(0);
+ const Value *RHS = CI->getOperand(1);
+
+ MVT VT;
+ if (!isTypeSupported(LHS->getType(), VT))
+ return false;
+
+ unsigned BW = VT.getSizeInBits();
+ if (BW > 64)
+ return false;
+
+ MachineBasicBlock *TBB = FuncInfo.MBBMap[BI->getSuccessor(0)];
+ MachineBasicBlock *FBB = FuncInfo.MBBMap[BI->getSuccessor(1)];
+
+ // Try to take advantage of fallthrough opportunities.
+ if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
+ std::swap(TBB, FBB);
+ Predicate = CmpInst::getInversePredicate(Predicate);
+ }
+
+ int TestBit = -1;
+ bool IsCmpNE;
+ if ((Predicate == CmpInst::ICMP_EQ) || (Predicate == CmpInst::ICMP_NE)) {
+ if (const auto *C = dyn_cast<Constant>(LHS))
+ if (C->isNullValue())
+ std::swap(LHS, RHS);
+
+ if (!isa<Constant>(RHS))
+ return false;
+
+ if (!cast<Constant>(RHS)->isNullValue())
+ return false;
+
+ if (const auto *AI = dyn_cast<BinaryOperator>(LHS))
+ if (AI->getOpcode() == Instruction::And && isValueAvailable(AI)) {
+ const Value *AndLHS = AI->getOperand(0);
+ const Value *AndRHS = AI->getOperand(1);
+
+ if (const auto *C = dyn_cast<ConstantInt>(AndLHS))
+ if (C->getValue().isPowerOf2())
+ std::swap(AndLHS, AndRHS);
+
+ if (const auto *C = dyn_cast<ConstantInt>(AndRHS))
+ if (C->getValue().isPowerOf2()) {
+ TestBit = C->getValue().logBase2();
+ LHS = AndLHS;
+ }
+ }
+
+ if (VT == MVT::i1)
+ TestBit = 0;
+
+ IsCmpNE = Predicate == CmpInst::ICMP_NE;
+ } else if (Predicate == CmpInst::ICMP_SLT) {
+ if (!isa<Constant>(RHS))
+ return false;
+
+ if (!cast<Constant>(RHS)->isNullValue())
+ return false;
+
+ TestBit = BW - 1;
+ IsCmpNE = true;
+ } else if (Predicate == CmpInst::ICMP_SGT) {
+ if (!isa<ConstantInt>(RHS))
+ return false;
+
+ if (cast<ConstantInt>(RHS)->getValue() != -1)
+ return false;
+
+ TestBit = BW - 1;
+ IsCmpNE = false;
+ } else
+ return false;
+
+ static const unsigned OpcTable[2][2][2] = {
+ { {AArch64::CBZW, AArch64::CBZX },
+ {AArch64::CBNZW, AArch64::CBNZX} },
+ { {AArch64::TBZW, AArch64::TBZX },
+ {AArch64::TBNZW, AArch64::TBNZX} }
+ };
+
+ bool IsBitTest = TestBit != -1;
+ bool Is64Bit = BW == 64;
+ if (TestBit < 32 && TestBit >= 0)
+ Is64Bit = false;
+
+ unsigned Opc = OpcTable[IsBitTest][IsCmpNE][Is64Bit];
+ const MCInstrDesc &II = TII.get(Opc);
+
+ unsigned SrcReg = getRegForValue(LHS);
+ if (!SrcReg)
+ return false;
+ bool SrcIsKill = hasTrivialKill(LHS);
+
+ if (BW == 64 && !Is64Bit)
+ SrcReg = fastEmitInst_extractsubreg(MVT::i32, SrcReg, SrcIsKill,
+ AArch64::sub_32);
+
+ if ((BW < 32) && !IsBitTest)
+ SrcReg = emitIntExt(VT, SrcReg, MVT::i32, /*IsZExt=*/true);
+
+ // Emit the combined compare and branch instruction.
+ SrcReg = constrainOperandRegClass(II, SrcReg, II.getNumDefs());
+ MachineInstrBuilder MIB =
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc))
+ .addReg(SrcReg, getKillRegState(SrcIsKill));
+ if (IsBitTest)
+ MIB.addImm(TestBit);
+ MIB.addMBB(TBB);
+
+ // Obtain the branch weight and add the TrueBB to the successor list.
+ uint32_t BranchWeight = 0;
+ if (FuncInfo.BPI)
+ BranchWeight = FuncInfo.BPI->getEdgeWeight(BI->getParent(),
+ TBB->getBasicBlock());
+ FuncInfo.MBB->addSuccessor(TBB, BranchWeight);
+ fastEmitBranch(FBB, DbgLoc);
+
+ return true;
+}
+
+bool AArch64FastISel::selectBranch(const Instruction *I) {
const BranchInst *BI = cast<BranchInst>(I);
if (BI->isUnconditional()) {
MachineBasicBlock *MSucc = FuncInfo.MBBMap[BI->getSuccessor(0)];
AArch64CC::CondCode CC = AArch64CC::NE;
if (const CmpInst *CI = dyn_cast<CmpInst>(BI->getCondition())) {
- if (CI->hasOneUse() && (CI->getParent() == I->getParent())) {
- // We may not handle every CC for now.
- CC = getCompareCC(CI->getPredicate());
- if (CC == AArch64CC::AL)
- return false;
+ if (CI->hasOneUse() && isValueAvailable(CI)) {
+ // Try to optimize or fold the cmp.
+ CmpInst::Predicate Predicate = optimizeCmpPredicate(CI);
+ switch (Predicate) {
+ default:
+ break;
+ case CmpInst::FCMP_FALSE:
+ fastEmitBranch(FBB, DbgLoc);
+ return true;
+ case CmpInst::FCMP_TRUE:
+ fastEmitBranch(TBB, DbgLoc);
+ return true;
+ }
+
+ // Try to emit a combined compare-and-branch first.
+ if (emitCompareAndBranch(BI))
+ return true;
+
+ // Try to take advantage of fallthrough opportunities.
+ if (FuncInfo.MBB->isLayoutSuccessor(TBB)) {
+ std::swap(TBB, FBB);
+ Predicate = CmpInst::getInversePredicate(Predicate);
+ }
// Emit the cmp.
if (!emitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned()))
return false;
+ // FCMP_UEQ and FCMP_ONE cannot be checked with a single branch
+ // instruction.
+ CC = getCompareCC(Predicate);
+ AArch64CC::CondCode ExtraCC = AArch64CC::AL;
+ switch (Predicate) {
+ default:
+ break;
+ case CmpInst::FCMP_UEQ:
+ ExtraCC = AArch64CC::EQ;
+ CC = AArch64CC::VS;
+ break;
+ case CmpInst::FCMP_ONE:
+ ExtraCC = AArch64CC::MI;
+ CC = AArch64CC::GT;
+ break;
+ }
+ assert((CC != AArch64CC::AL) && "Unexpected condition code.");
+
+ // Emit the extra branch for FCMP_UEQ and FCMP_ONE.
+ if (ExtraCC != AArch64CC::AL) {
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc))
+ .addImm(ExtraCC)
+ .addMBB(TBB);
+ }
+
// Emit the branch.
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::Bcc))
.addImm(CC)
}
} else if (TruncInst *TI = dyn_cast<TruncInst>(BI->getCondition())) {
MVT SrcVT;
- if (TI->hasOneUse() && TI->getParent() == I->getParent() &&
- (isTypeSupported(TI->getOperand(0)->getType(), SrcVT))) {
+ if (TI->hasOneUse() && isValueAvailable(TI) &&
+ isTypeSupported(TI->getOperand(0)->getType(), SrcVT)) {
unsigned CondReg = getRegForValue(TI->getOperand(0));
if (!CondReg)
return false;
fastEmitBranch(FBB, DbgLoc);
return true;
}
- } else if (const ConstantInt *CI =
- dyn_cast<ConstantInt>(BI->getCondition())) {
+ } else if (const auto *CI = dyn_cast<ConstantInt>(BI->getCondition())) {
uint64_t Imm = CI->getZExtValue();
MachineBasicBlock *Target = (Imm == 0) ? FBB : TBB;
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::B))
return true;
}
-bool AArch64FastISel::SelectIndirectBr(const Instruction *I) {
+bool AArch64FastISel::selectIndirectBr(const Instruction *I) {
const IndirectBrInst *BI = cast<IndirectBrInst>(I);
unsigned AddrReg = getRegForValue(BI->getOperand(0));
if (AddrReg == 0)
return true;
}
-bool AArch64FastISel::SelectCmp(const Instruction *I) {
+bool AArch64FastISel::selectCmp(const Instruction *I) {
const CmpInst *CI = cast<CmpInst>(I);
// Try to optimize or fold the cmp.
return true;
}
-bool AArch64FastISel::SelectSelect(const Instruction *I) {
+bool AArch64FastISel::selectSelect(const Instruction *I) {
const SelectInst *SI = cast<SelectInst>(I);
EVT DestEVT = TLI.getValueType(SI->getType(), true);
return true;
}
-bool AArch64FastISel::SelectFPExt(const Instruction *I) {
+bool AArch64FastISel::selectFPExt(const Instruction *I) {
Value *V = I->getOperand(0);
if (!I->getType()->isDoubleTy() || !V->getType()->isFloatTy())
return false;
return true;
}
-bool AArch64FastISel::SelectFPTrunc(const Instruction *I) {
+bool AArch64FastISel::selectFPTrunc(const Instruction *I) {
Value *V = I->getOperand(0);
if (!I->getType()->isFloatTy() || !V->getType()->isDoubleTy())
return false;
}
// FPToUI and FPToSI
-bool AArch64FastISel::SelectFPToInt(const Instruction *I, bool Signed) {
+bool AArch64FastISel::selectFPToInt(const Instruction *I, bool Signed) {
MVT DestVT;
if (!isTypeLegal(I->getType(), DestVT) || DestVT.isVector())
return false;
return true;
}
-bool AArch64FastISel::SelectIntToFP(const Instruction *I, bool Signed) {
+bool AArch64FastISel::selectIntToFP(const Instruction *I, bool Signed) {
MVT DestVT;
if (!isTypeLegal(I->getType(), DestVT) || DestVT.isVector())
return false;
// Handle sign-extension.
if (SrcVT == MVT::i16 || SrcVT == MVT::i8 || SrcVT == MVT::i1) {
SrcReg =
- EmitIntExt(SrcVT.getSimpleVT(), SrcReg, MVT::i32, /*isZExt*/ !Signed);
+ emitIntExt(SrcVT.getSimpleVT(), SrcReg, MVT::i32, /*isZExt*/ !Signed);
if (!SrcReg)
return false;
SrcIsKill = true;
if (CC != CallingConv::C)
return false;
- // Only handle simple cases like i1/i8/i16/i32/i64/f32/f64 of up to 8 GPR and
- // FPR each.
+ // Only handle simple cases of up to 8 GPR and FPR each.
unsigned GPRCnt = 0;
unsigned FPRCnt = 0;
unsigned Idx = 0;
return false;
Type *ArgTy = Arg.getType();
- if (ArgTy->isStructTy() || ArgTy->isArrayTy() || ArgTy->isVectorTy())
+ if (ArgTy->isStructTy() || ArgTy->isArrayTy())
return false;
EVT ArgVT = TLI.getValueType(ArgTy);
- if (!ArgVT.isSimple()) return false;
- switch (ArgVT.getSimpleVT().SimpleTy) {
- default: return false;
- case MVT::i1:
- case MVT::i8:
- case MVT::i16:
- case MVT::i32:
- case MVT::i64:
+ if (!ArgVT.isSimple())
+ return false;
+
+ MVT VT = ArgVT.getSimpleVT().SimpleTy;
+ if (VT.isFloatingPoint() && !Subtarget->hasFPARMv8())
+ return false;
+
+ if (VT.isVector() &&
+ (!Subtarget->hasNEON() || !Subtarget->isLittleEndian()))
+ return false;
+
+ if (VT >= MVT::i1 && VT <= MVT::i64)
++GPRCnt;
- break;
- case MVT::f16:
- case MVT::f32:
- case MVT::f64:
+ else if ((VT >= MVT::f16 && VT <= MVT::f64) || VT.is64BitVector() ||
+ VT.is128BitVector())
++FPRCnt;
- break;
- }
+ else
+ return false;
if (GPRCnt > 8 || FPRCnt > 8)
return false;
}
- static const MCPhysReg Registers[5][8] = {
+ static const MCPhysReg Registers[6][8] = {
{ AArch64::W0, AArch64::W1, AArch64::W2, AArch64::W3, AArch64::W4,
AArch64::W5, AArch64::W6, AArch64::W7 },
{ AArch64::X0, AArch64::X1, AArch64::X2, AArch64::X3, AArch64::X4,
{ AArch64::S0, AArch64::S1, AArch64::S2, AArch64::S3, AArch64::S4,
AArch64::S5, AArch64::S6, AArch64::S7 },
{ AArch64::D0, AArch64::D1, AArch64::D2, AArch64::D3, AArch64::D4,
- AArch64::D5, AArch64::D6, AArch64::D7 }
+ AArch64::D5, AArch64::D6, AArch64::D7 },
+ { AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3, AArch64::Q4,
+ AArch64::Q5, AArch64::Q6, AArch64::Q7 }
};
unsigned GPRIdx = 0;
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++]; 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);
- continue;
- }
+ const TargetRegisterClass *RC;
+ if (VT >= MVT::i1 && VT <= MVT::i32) {
+ SrcReg = Registers[0][GPRIdx++];
+ RC = &AArch64::GPR32RegClass;
+ VT = MVT::i32;
+ } else if (VT == MVT::i64) {
+ SrcReg = Registers[1][GPRIdx++];
+ RC = &AArch64::GPR64RegClass;
+ } else if (VT == MVT::f16) {
+ SrcReg = Registers[2][FPRIdx++];
+ RC = &AArch64::FPR16RegClass;
+ } else if (VT == MVT::f32) {
+ SrcReg = Registers[3][FPRIdx++];
+ RC = &AArch64::FPR32RegClass;
+ } else if ((VT == MVT::f64) || VT.is64BitVector()) {
+ SrcReg = Registers[4][FPRIdx++];
+ RC = &AArch64::FPR64RegClass;
+ } else if (VT.is128BitVector()) {
+ SrcReg = Registers[5][FPRIdx++];
+ RC = &AArch64::FPR128RegClass;
+ } else
+ llvm_unreachable("Unexpected value type.");
unsigned DstReg = FuncInfo.MF->addLiveIn(SrcReg, RC);
// FIXME: Unfortunately it's necessary to emit a copy from the livein copy.
return true;
}
-bool AArch64FastISel::ProcessCallArgs(CallLoweringInfo &CLI,
+bool AArch64FastISel::processCallArgs(CallLoweringInfo &CLI,
SmallVectorImpl<MVT> &OutVTs,
unsigned &NumBytes) {
CallingConv::ID CC = CLI.CallConv;
case CCValAssign::SExt: {
MVT DestVT = VA.getLocVT();
MVT SrcVT = ArgVT;
- ArgReg = EmitIntExt(SrcVT, ArgReg, DestVT, /*isZExt=*/false);
+ ArgReg = emitIntExt(SrcVT, ArgReg, DestVT, /*isZExt=*/false);
if (!ArgReg)
return false;
break;
case CCValAssign::ZExt: {
MVT DestVT = VA.getLocVT();
MVT SrcVT = ArgVT;
- ArgReg = EmitIntExt(SrcVT, ArgReg, DestVT, /*isZExt=*/true);
+ ArgReg = emitIntExt(SrcVT, ArgReg, DestVT, /*isZExt=*/true);
if (!ArgReg)
return false;
break;
MachinePointerInfo::getStack(Addr.getOffset()),
MachineMemOperand::MOStore, ArgVT.getStoreSize(), Alignment);
- if (!EmitStore(ArgVT, ArgReg, Addr, MMO))
+ if (!emitStore(ArgVT, ArgReg, Addr, MMO))
return false;
}
}
return true;
}
-bool AArch64FastISel::FinishCall(CallLoweringInfo &CLI, MVT RetVT,
+bool AArch64FastISel::finishCall(CallLoweringInfo &CLI, MVT RetVT,
unsigned NumBytes) {
CallingConv::ID CC = CLI.CallConv;
}
Address Addr;
- if (Callee && !ComputeCallAddress(Callee, Addr))
+ if (Callee && !computeCallAddress(Callee, Addr))
return false;
// Handle the arguments now that we've gotten them.
unsigned NumBytes;
- if (!ProcessCallArgs(CLI, OutVTs, NumBytes))
+ if (!processCallArgs(CLI, OutVTs, NumBytes))
return false;
// Issue the call.
.addReg(ADRPReg)
.addExternalSymbol(SymName, AArch64II::MO_GOT | AArch64II::MO_PAGEOFF |
AArch64II::MO_NC);
- } else if (Addr.getGlobalValue()) {
- CallReg = AArch64MaterializeGV(Addr.getGlobalValue());
- } else if (Addr.getReg())
+ } else if (Addr.getGlobalValue())
+ CallReg = materializeGV(Addr.getGlobalValue());
+ else if (Addr.getReg())
CallReg = Addr.getReg();
if (!CallReg)
CLI.Call = MIB;
// Finish off the call including any return values.
- return FinishCall(CLI, RetVT, NumBytes);
+ return finishCall(CLI, RetVT, NumBytes);
}
-bool AArch64FastISel::IsMemCpySmall(uint64_t Len, unsigned Alignment) {
+bool AArch64FastISel::isMemCpySmall(uint64_t Len, unsigned Alignment) {
if (Alignment)
return Len / Alignment <= 4;
else
return Len < 32;
}
-bool AArch64FastISel::TryEmitSmallMemCpy(Address Dest, Address Src,
+bool AArch64FastISel::tryEmitSmallMemCpy(Address Dest, Address Src,
uint64_t Len, unsigned Alignment) {
// Make sure we don't bloat code by inlining very large memcpy's.
- if (!IsMemCpySmall(Len, Alignment))
+ if (!isMemCpySmall(Len, Alignment))
return false;
int64_t UnscaledOffset = 0;
}
}
- bool RV;
- unsigned ResultReg;
- RV = EmitLoad(VT, ResultReg, Src);
- if (!RV)
+ unsigned ResultReg = emitLoad(VT, VT, Src);
+ if (!ResultReg)
return false;
- RV = EmitStore(VT, ResultReg, Dest);
- if (!RV)
+ if (!emitStore(VT, ResultReg, Dest))
return false;
int64_t Size = VT.getSizeInBits() / 8;
if (RetVT != MVT::i32 && RetVT != MVT::i64)
return false;
+ const Value *LHS = II->getArgOperand(0);
+ const Value *RHS = II->getArgOperand(1);
+
+ // Canonicalize immediate to the RHS.
+ if (isa<ConstantInt>(LHS) && !isa<ConstantInt>(RHS) &&
+ isCommutativeIntrinsic(II))
+ std::swap(LHS, RHS);
+
+ // Simplify multiplies.
+ unsigned IID = II->getIntrinsicID();
+ switch (IID) {
+ default:
+ break;
+ case Intrinsic::smul_with_overflow:
+ if (const auto *C = dyn_cast<ConstantInt>(RHS))
+ if (C->getValue() == 2)
+ IID = Intrinsic::sadd_with_overflow;
+ break;
+ case Intrinsic::umul_with_overflow:
+ if (const auto *C = dyn_cast<ConstantInt>(RHS))
+ if (C->getValue() == 2)
+ IID = Intrinsic::uadd_with_overflow;
+ break;
+ }
+
AArch64CC::CondCode TmpCC;
- switch (II->getIntrinsicID()) {
- default: return false;
- case Intrinsic::sadd_with_overflow:
- case Intrinsic::ssub_with_overflow: TmpCC = AArch64CC::VS; break;
- case Intrinsic::uadd_with_overflow: TmpCC = AArch64CC::HS; break;
- case Intrinsic::usub_with_overflow: TmpCC = AArch64CC::LO; break;
- case Intrinsic::smul_with_overflow:
- case Intrinsic::umul_with_overflow: TmpCC = AArch64CC::NE; break;
+ switch (IID) {
+ default:
+ return false;
+ case Intrinsic::sadd_with_overflow:
+ case Intrinsic::ssub_with_overflow:
+ TmpCC = AArch64CC::VS;
+ break;
+ case Intrinsic::uadd_with_overflow:
+ TmpCC = AArch64CC::HS;
+ break;
+ case Intrinsic::usub_with_overflow:
+ TmpCC = AArch64CC::LO;
+ break;
+ case Intrinsic::smul_with_overflow:
+ case Intrinsic::umul_with_overflow:
+ TmpCC = AArch64CC::NE;
+ break;
}
// Check if both instructions are in the same basic block.
- if (II->getParent() != I->getParent())
+ if (!isValueAvailable(II))
return false;
// Make sure nothing is in the way
// if possible.
uint64_t Len = cast<ConstantInt>(MTI->getLength())->getZExtValue();
unsigned Alignment = MTI->getAlignment();
- if (IsMemCpySmall(Len, Alignment)) {
+ if (isMemCpySmall(Len, Alignment)) {
Address Dest, Src;
- if (!ComputeAddress(MTI->getRawDest(), Dest) ||
- !ComputeAddress(MTI->getRawSource(), Src))
+ if (!computeAddress(MTI->getRawDest(), Dest) ||
+ !computeAddress(MTI->getRawSource(), Src))
return false;
- if (TryEmitSmallMemCpy(Dest, Src, Len, Alignment))
+ if (tryEmitSmallMemCpy(Dest, Src, Len, Alignment))
return true;
}
}
isCommutativeIntrinsic(II))
std::swap(LHS, RHS);
+ // Simplify multiplies.
+ unsigned IID = II->getIntrinsicID();
+ switch (IID) {
+ default:
+ break;
+ case Intrinsic::smul_with_overflow:
+ if (const auto *C = dyn_cast<ConstantInt>(RHS))
+ if (C->getValue() == 2) {
+ IID = Intrinsic::sadd_with_overflow;
+ RHS = LHS;
+ }
+ break;
+ case Intrinsic::umul_with_overflow:
+ if (const auto *C = dyn_cast<ConstantInt>(RHS))
+ if (C->getValue() == 2) {
+ IID = Intrinsic::uadd_with_overflow;
+ RHS = LHS;
+ }
+ break;
+ }
+
unsigned ResultReg1 = 0, ResultReg2 = 0, MulReg = 0;
AArch64CC::CondCode CC = AArch64CC::Invalid;
- switch (II->getIntrinsicID()) {
+ switch (IID) {
default: llvm_unreachable("Unexpected intrinsic!");
case Intrinsic::sadd_with_overflow:
ResultReg1 = emitAdd(VT, LHS, RHS, /*SetFlags=*/true);
bool RHSIsKill = hasTrivialKill(RHS);
if (VT == MVT::i32) {
- MulReg = Emit_SMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
+ MulReg = emitSMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
unsigned ShiftReg = emitLSR_ri(MVT::i64, MVT::i64, MulReg,
/*IsKill=*/false, 32);
MulReg = fastEmitInst_extractsubreg(VT, MulReg, /*IsKill=*/true,
AArch64_AM::ASR, 31, /*WantResult=*/false);
} else {
assert(VT == MVT::i64 && "Unexpected value type.");
- MulReg = Emit_MUL_rr(VT, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
+ MulReg = emitMul_rr(VT, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
unsigned SMULHReg = fastEmit_rr(VT, VT, ISD::MULHS, LHSReg, LHSIsKill,
RHSReg, RHSIsKill);
emitSubs_rs(VT, SMULHReg, /*IsKill=*/true, MulReg, /*IsKill=*/false,
bool RHSIsKill = hasTrivialKill(RHS);
if (VT == MVT::i32) {
- MulReg = Emit_UMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
+ MulReg = emitUMULL_rr(MVT::i64, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
emitSubs_rs(MVT::i64, AArch64::XZR, /*IsKill=*/true, MulReg,
/*IsKill=*/false, AArch64_AM::LSR, 32,
/*WantResult=*/false);
AArch64::sub_32);
} else {
assert(VT == MVT::i64 && "Unexpected value type.");
- MulReg = Emit_MUL_rr(VT, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
+ MulReg = emitMul_rr(VT, LHSReg, LHSIsKill, RHSReg, RHSIsKill);
unsigned UMULHReg = fastEmit_rr(VT, VT, ISD::MULHU, LHSReg, LHSIsKill,
RHSReg, RHSIsKill);
emitSubs_rr(VT, AArch64::XZR, /*IsKill=*/true, UMULHReg,
ResultReg2 = fastEmitInst_rri(AArch64::CSINCWr, &AArch64::GPR32RegClass,
AArch64::WZR, /*IsKill=*/true, AArch64::WZR,
/*IsKill=*/true, getInvertedCondCode(CC));
+ (void)ResultReg2;
assert((ResultReg1 + 1) == ResultReg2 &&
"Nonconsecutive result registers.");
updateValueMap(II, ResultReg1, 2);
return false;
}
-bool AArch64FastISel::SelectRet(const Instruction *I) {
+bool AArch64FastISel::selectRet(const Instruction *I) {
const ReturnInst *Ret = cast<ReturnInst>(I);
const Function &F = *I->getParent()->getParent();
const Value *RV = Ret->getOperand(0);
// Don't bother handling odd stuff for now.
- if (VA.getLocInfo() != CCValAssign::Full)
+ if ((VA.getLocInfo() != CCValAssign::Full) &&
+ (VA.getLocInfo() != CCValAssign::BCvt))
return false;
+
// Only handle register returns for now.
if (!VA.isRegLoc())
return false;
+
unsigned Reg = getRegForValue(RV);
if (Reg == 0)
return false;
return false;
// Vectors (of > 1 lane) in big endian need tricky handling.
- if (RVEVT.isVector() && RVEVT.getVectorNumElements() > 1)
+ if (RVEVT.isVector() && RVEVT.getVectorNumElements() > 1 &&
+ !Subtarget->isLittleEndian())
return false;
MVT RVVT = RVEVT.getSimpleVT();
if (RVVT == MVT::f128)
return false;
+
MVT DestVT = VA.getValVT();
// Special handling for extended integers.
if (RVVT != DestVT) {
if (!Outs[0].Flags.isZExt() && !Outs[0].Flags.isSExt())
return false;
- bool isZExt = Outs[0].Flags.isZExt();
- SrcReg = EmitIntExt(RVVT, SrcReg, DestVT, isZExt);
+ bool IsZExt = Outs[0].Flags.isZExt();
+ SrcReg = emitIntExt(RVVT, SrcReg, DestVT, IsZExt);
if (SrcReg == 0)
return false;
}
return true;
}
-bool AArch64FastISel::SelectTrunc(const Instruction *I) {
+bool AArch64FastISel::selectTrunc(const Instruction *I) {
Type *DestTy = I->getType();
Value *Op = I->getOperand(0);
Type *SrcTy = Op->getType();
return true;
}
-unsigned AArch64FastISel::Emiti1Ext(unsigned SrcReg, MVT DestVT, bool isZExt) {
+unsigned AArch64FastISel::emiti1Ext(unsigned SrcReg, MVT DestVT, bool IsZExt) {
assert((DestVT == MVT::i8 || DestVT == MVT::i16 || DestVT == MVT::i32 ||
DestVT == MVT::i64) &&
"Unexpected value type.");
if (DestVT == MVT::i8 || DestVT == MVT::i16)
DestVT = MVT::i32;
- if (isZExt) {
+ if (IsZExt) {
unsigned ResultReg = emitAnd_ri(MVT::i32, SrcReg, /*TODO:IsKill=*/false, 1);
assert(ResultReg && "Unexpected AND instruction emission failure.");
if (DestVT == MVT::i64) {
}
}
-unsigned AArch64FastISel::Emit_MUL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
+unsigned AArch64FastISel::emitMul_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
unsigned Op1, bool Op1IsKill) {
unsigned Opc, ZReg;
switch (RetVT.SimpleTy) {
/*IsKill=*/ZReg, true);
}
-unsigned AArch64FastISel::Emit_SMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
+unsigned AArch64FastISel::emitSMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
unsigned Op1, bool Op1IsKill) {
if (RetVT != MVT::i64)
return 0;
AArch64::XZR, /*IsKill=*/true);
}
-unsigned AArch64FastISel::Emit_UMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
+unsigned AArch64FastISel::emitUMULL_rr(MVT RetVT, unsigned Op0, bool Op0IsKill,
unsigned Op1, bool Op1IsKill) {
if (RetVT != MVT::i64)
return 0;
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((SrcVT == MVT::i1 || 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.");
// 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
if (Shift >= SrcBits && IsZExt)
- return AArch64MaterializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)),
- RetVT);
+ return materializeInt(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);
+ Op0 = emitIntExt(SrcVT, Op0, RetVT, IsZExt);
if (!Op0)
return 0;
Op0IsKill = true;
const TargetRegisterClass *RC =
(RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
if (NeedTrunc) {
- Op0Reg = EmitIntExt(RetVT, Op0Reg, MVT::i32, /*IsZExt=*/false);
+ Op0Reg = emitIntExt(RetVT, Op0Reg, MVT::i32, /*IsZExt=*/false);
Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask);
Op0IsKill = Op1IsKill = true;
}
// 0b0000_0000_0000_0000__0000_0000_0000_0000 zext
if (Shift >= SrcBits && IsZExt)
- return AArch64MaterializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)),
- RetVT);
+ return materializeInt(ConstantInt::get(*Context, APInt(RegSize, 0)), RetVT);
unsigned ImmR = std::min<unsigned>(SrcBits - 1, Shift);
unsigned ImmS = SrcBits - 1;
return fastEmitInst_rii(Opc, RC, Op0, Op0IsKill, ImmR, ImmS);
}
-unsigned AArch64FastISel::EmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT,
- bool isZExt) {
+unsigned AArch64FastISel::emitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT,
+ bool IsZExt) {
assert(DestVT != MVT::i1 && "ZeroExt/SignExt an i1?");
// FastISel does not have plumbing to deal with extensions where the SrcVT or
default:
return 0;
case MVT::i1:
- return Emiti1Ext(SrcReg, DestVT, isZExt);
+ return emiti1Ext(SrcReg, DestVT, IsZExt);
case MVT::i8:
if (DestVT == MVT::i64)
- Opc = isZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
+ Opc = IsZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
else
- Opc = isZExt ? AArch64::UBFMWri : AArch64::SBFMWri;
+ Opc = IsZExt ? AArch64::UBFMWri : AArch64::SBFMWri;
Imm = 7;
break;
case MVT::i16:
if (DestVT == MVT::i64)
- Opc = isZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
+ Opc = IsZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
else
- Opc = isZExt ? AArch64::UBFMWri : AArch64::SBFMWri;
+ Opc = IsZExt ? AArch64::UBFMWri : AArch64::SBFMWri;
Imm = 15;
break;
case MVT::i32:
assert(DestVT == MVT::i64 && "IntExt i32 to i32?!?");
- Opc = isZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
+ Opc = IsZExt ? AArch64::UBFMXri : AArch64::SBFMXri;
Imm = 31;
break;
}
return fastEmitInst_rii(Opc, RC, SrcReg, /*TODO:IsKill=*/false, 0, Imm);
}
-bool AArch64FastISel::SelectIntExt(const Instruction *I) {
- // On ARM, in general, integer casts don't involve legal types; this code
- // handles promotable integers. The high bits for a type smaller than
- // the register size are assumed to be undefined.
- Type *DestTy = I->getType();
- Value *Src = I->getOperand(0);
- Type *SrcTy = Src->getType();
+static bool isZExtLoad(const MachineInstr *LI) {
+ switch (LI->getOpcode()) {
+ default:
+ return false;
+ case AArch64::LDURBBi:
+ case AArch64::LDURHHi:
+ case AArch64::LDURWi:
+ case AArch64::LDRBBui:
+ case AArch64::LDRHHui:
+ case AArch64::LDRWui:
+ case AArch64::LDRBBroX:
+ case AArch64::LDRHHroX:
+ case AArch64::LDRWroX:
+ case AArch64::LDRBBroW:
+ case AArch64::LDRHHroW:
+ case AArch64::LDRWroW:
+ return true;
+ }
+}
- bool isZExt = isa<ZExtInst>(I);
- unsigned SrcReg = getRegForValue(Src);
- if (!SrcReg)
+static bool isSExtLoad(const MachineInstr *LI) {
+ switch (LI->getOpcode()) {
+ default:
return false;
+ case AArch64::LDURSBWi:
+ case AArch64::LDURSHWi:
+ case AArch64::LDURSBXi:
+ case AArch64::LDURSHXi:
+ case AArch64::LDURSWi:
+ case AArch64::LDRSBWui:
+ case AArch64::LDRSHWui:
+ case AArch64::LDRSBXui:
+ case AArch64::LDRSHXui:
+ case AArch64::LDRSWui:
+ case AArch64::LDRSBWroX:
+ case AArch64::LDRSHWroX:
+ case AArch64::LDRSBXroX:
+ case AArch64::LDRSHXroX:
+ case AArch64::LDRSWroX:
+ case AArch64::LDRSBWroW:
+ case AArch64::LDRSHWroW:
+ case AArch64::LDRSBXroW:
+ case AArch64::LDRSHXroW:
+ case AArch64::LDRSWroW:
+ return true;
+ }
+}
- EVT SrcEVT = TLI.getValueType(SrcTy, true);
- EVT DestEVT = TLI.getValueType(DestTy, true);
- if (!SrcEVT.isSimple())
+bool AArch64FastISel::optimizeIntExtLoad(const Instruction *I, MVT RetVT,
+ MVT SrcVT) {
+ const auto *LI = dyn_cast<LoadInst>(I->getOperand(0));
+ if (!LI || !LI->hasOneUse())
return false;
- if (!DestEVT.isSimple())
+
+ // Check if the load instruction has already been selected.
+ unsigned Reg = lookUpRegForValue(LI);
+ if (!Reg)
return false;
- MVT SrcVT = SrcEVT.getSimpleVT();
- MVT DestVT = DestEVT.getSimpleVT();
- unsigned ResultReg = 0;
+ MachineInstr *MI = MRI.getUniqueVRegDef(Reg);
+ if (!MI)
+ return false;
+
+ // Check if the correct load instruction has been emitted - SelectionDAG might
+ // have emitted a zero-extending load, but we need a sign-extending load.
+ bool IsZExt = isa<ZExtInst>(I);
+ const auto *LoadMI = MI;
+ if (LoadMI->getOpcode() == TargetOpcode::COPY &&
+ LoadMI->getOperand(1).getSubReg() == AArch64::sub_32) {
+ unsigned LoadReg = MI->getOperand(1).getReg();
+ LoadMI = MRI.getUniqueVRegDef(LoadReg);
+ assert(LoadMI && "Expected valid instruction");
+ }
+ if (!(IsZExt && isZExtLoad(LoadMI)) && !(!IsZExt && isSExtLoad(LoadMI)))
+ return false;
+
+ // Nothing to be done.
+ if (RetVT != MVT::i64 || SrcVT > MVT::i32) {
+ updateValueMap(I, Reg);
+ return true;
+ }
+
+ if (IsZExt) {
+ unsigned Reg64 = createResultReg(&AArch64::GPR64RegClass);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
+ TII.get(AArch64::SUBREG_TO_REG), Reg64)
+ .addImm(0)
+ .addReg(Reg, getKillRegState(true))
+ .addImm(AArch64::sub_32);
+ Reg = Reg64;
+ } else {
+ assert((MI->getOpcode() == TargetOpcode::COPY &&
+ MI->getOperand(1).getSubReg() == AArch64::sub_32) &&
+ "Expected copy instruction");
+ Reg = MI->getOperand(1).getReg();
+ MI->eraseFromParent();
+ }
+ updateValueMap(I, Reg);
+ return true;
+}
+
+bool AArch64FastISel::selectIntExt(const Instruction *I) {
+ assert((isa<ZExtInst>(I) || isa<SExtInst>(I)) &&
+ "Unexpected integer extend instruction.");
+ MVT RetVT;
+ MVT SrcVT;
+ if (!isTypeSupported(I->getType(), RetVT))
+ return false;
+
+ if (!isTypeSupported(I->getOperand(0)->getType(), SrcVT))
+ return false;
- // Check if it is an argument and if it is already zero/sign-extended.
- if (const auto *Arg = dyn_cast<Argument>(Src)) {
- if ((isZExt && Arg->hasZExtAttr()) || (!isZExt && Arg->hasSExtAttr())) {
- if (DestVT == MVT::i64) {
- ResultReg = createResultReg(TLI.getRegClassFor(DestVT));
+ // Try to optimize already sign-/zero-extended values from load instructions.
+ if (optimizeIntExtLoad(I, RetVT, SrcVT))
+ return true;
+
+ unsigned SrcReg = getRegForValue(I->getOperand(0));
+ if (!SrcReg)
+ return false;
+ bool SrcIsKill = hasTrivialKill(I->getOperand(0));
+
+ // Try to optimize already sign-/zero-extended values from function arguments.
+ bool IsZExt = isa<ZExtInst>(I);
+ if (const auto *Arg = dyn_cast<Argument>(I->getOperand(0))) {
+ if ((IsZExt && Arg->hasZExtAttr()) || (!IsZExt && Arg->hasSExtAttr())) {
+ if (RetVT == MVT::i64 && SrcVT != MVT::i64) {
+ unsigned ResultReg = createResultReg(&AArch64::GPR64RegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
TII.get(AArch64::SUBREG_TO_REG), ResultReg)
- .addImm(0)
- .addReg(SrcReg)
- .addImm(AArch64::sub_32);
- } else
- ResultReg = SrcReg;
+ .addImm(0)
+ .addReg(SrcReg, getKillRegState(SrcIsKill))
+ .addImm(AArch64::sub_32);
+ SrcReg = ResultReg;
+ }
+ updateValueMap(I, SrcReg);
+ return true;
}
}
- if (!ResultReg)
- ResultReg = EmitIntExt(SrcVT, SrcReg, DestVT, isZExt);
-
+ unsigned ResultReg = emitIntExt(SrcVT, SrcReg, RetVT, IsZExt);
if (!ResultReg)
return false;
return true;
}
-bool AArch64FastISel::SelectRem(const Instruction *I, unsigned ISDOpcode) {
+bool AArch64FastISel::selectRem(const Instruction *I, unsigned ISDOpcode) {
EVT DestEVT = TLI.getValueType(I->getType(), true);
if (!DestEVT.isSimple())
return false;
return false;
unsigned DivOpc;
- bool is64bit = (DestVT == MVT::i64);
+ bool Is64bit = (DestVT == MVT::i64);
switch (ISDOpcode) {
default:
return false;
case ISD::SREM:
- DivOpc = is64bit ? AArch64::SDIVXr : AArch64::SDIVWr;
+ DivOpc = Is64bit ? AArch64::SDIVXr : AArch64::SDIVWr;
break;
case ISD::UREM:
- DivOpc = is64bit ? AArch64::UDIVXr : AArch64::UDIVWr;
+ DivOpc = Is64bit ? AArch64::UDIVXr : AArch64::UDIVWr;
break;
}
- unsigned MSubOpc = is64bit ? AArch64::MSUBXrrr : AArch64::MSUBWrrr;
+ unsigned MSubOpc = Is64bit ? AArch64::MSUBXrrr : AArch64::MSUBWrrr;
unsigned Src0Reg = getRegForValue(I->getOperand(0));
if (!Src0Reg)
return false;
return true;
}
-bool AArch64FastISel::SelectMul(const Instruction *I) {
- EVT SrcEVT = TLI.getValueType(I->getOperand(0)->getType(), true);
- if (!SrcEVT.isSimple())
+bool AArch64FastISel::selectMul(const Instruction *I) {
+ MVT VT;
+ if (!isTypeSupported(I->getType(), VT, /*IsVectorAllowed=*/true))
return false;
- MVT SrcVT = SrcEVT.getSimpleVT();
- // Must be simple value type. Don't handle vectors.
- if (SrcVT != MVT::i64 && SrcVT != MVT::i32 && SrcVT != MVT::i16 &&
- SrcVT != MVT::i8)
- return false;
+ if (VT.isVector())
+ return selectBinaryOp(I, ISD::MUL);
+
+ const Value *Src0 = I->getOperand(0);
+ const Value *Src1 = I->getOperand(1);
+ if (const auto *C = dyn_cast<ConstantInt>(Src0))
+ if (C->getValue().isPowerOf2())
+ std::swap(Src0, Src1);
+
+ // Try to simplify to a shift instruction.
+ if (const auto *C = dyn_cast<ConstantInt>(Src1))
+ if (C->getValue().isPowerOf2()) {
+ uint64_t ShiftVal = C->getValue().logBase2();
+ MVT SrcVT = VT;
+ bool IsZExt = true;
+ if (const auto *ZExt = dyn_cast<ZExtInst>(Src0)) {
+ if (!isIntExtFree(ZExt)) {
+ MVT VT;
+ if (isValueAvailable(ZExt) && isTypeSupported(ZExt->getSrcTy(), VT)) {
+ SrcVT = VT;
+ IsZExt = true;
+ Src0 = ZExt->getOperand(0);
+ }
+ }
+ } else if (const auto *SExt = dyn_cast<SExtInst>(Src0)) {
+ if (!isIntExtFree(SExt)) {
+ MVT VT;
+ if (isValueAvailable(SExt) && isTypeSupported(SExt->getSrcTy(), VT)) {
+ SrcVT = VT;
+ IsZExt = false;
+ Src0 = SExt->getOperand(0);
+ }
+ }
+ }
+
+ unsigned Src0Reg = getRegForValue(Src0);
+ if (!Src0Reg)
+ return false;
+ bool Src0IsKill = hasTrivialKill(Src0);
+
+ unsigned ResultReg =
+ emitLSL_ri(VT, SrcVT, Src0Reg, Src0IsKill, ShiftVal, IsZExt);
+
+ if (ResultReg) {
+ updateValueMap(I, ResultReg);
+ return true;
+ }
+ }
unsigned Src0Reg = getRegForValue(I->getOperand(0));
if (!Src0Reg)
return false;
bool Src1IsKill = hasTrivialKill(I->getOperand(1));
- unsigned ResultReg =
- Emit_MUL_rr(SrcVT, Src0Reg, Src0IsKill, Src1Reg, Src1IsKill);
+ unsigned ResultReg = emitMul_rr(VT, Src0Reg, Src0IsKill, Src1Reg, Src1IsKill);
if (!ResultReg)
return false;
return true;
}
-bool AArch64FastISel::SelectShift(const Instruction *I) {
+bool AArch64FastISel::selectShift(const Instruction *I) {
MVT RetVT;
if (!isTypeSupported(I->getType(), RetVT, /*IsVectorAllowed=*/true))
return false;
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);
+ if (!isIntExtFree(ZExt)) {
+ 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);
+ if (!isIntExtFree(SExt)) {
+ MVT TmpVT;
+ if (isValueAvailable(SExt) && isTypeSupported(SExt->getSrcTy(), TmpVT)) {
+ SrcVT = TmpVT;
+ IsZExt = false;
+ Op0 = SExt->getOperand(0);
+ }
}
}
return true;
}
-bool AArch64FastISel::SelectBitCast(const Instruction *I) {
+bool AArch64FastISel::selectBitCast(const Instruction *I) {
MVT RetVT, SrcVT;
if (!isTypeLegal(I->getOperand(0)->getType(), SrcVT))
return true;
}
+bool AArch64FastISel::selectSDiv(const Instruction *I) {
+ MVT VT;
+ if (!isTypeLegal(I->getType(), VT))
+ return false;
+
+ if (!isa<ConstantInt>(I->getOperand(1)))
+ return selectBinaryOp(I, ISD::SDIV);
+
+ const APInt &C = cast<ConstantInt>(I->getOperand(1))->getValue();
+ if ((VT != MVT::i32 && VT != MVT::i64) || !C ||
+ !(C.isPowerOf2() || (-C).isPowerOf2()))
+ return selectBinaryOp(I, ISD::SDIV);
+
+ unsigned Lg2 = C.countTrailingZeros();
+ unsigned Src0Reg = getRegForValue(I->getOperand(0));
+ if (!Src0Reg)
+ return false;
+ bool Src0IsKill = hasTrivialKill(I->getOperand(0));
+
+ if (cast<BinaryOperator>(I)->isExact()) {
+ unsigned ResultReg = emitASR_ri(VT, VT, Src0Reg, Src0IsKill, Lg2);
+ if (!ResultReg)
+ return false;
+ updateValueMap(I, ResultReg);
+ return true;
+ }
+
+ int64_t Pow2MinusOne = (1ULL << Lg2) - 1;
+ unsigned AddReg = emitAdd_ri_(VT, Src0Reg, /*IsKill=*/false, Pow2MinusOne);
+ if (!AddReg)
+ return false;
+
+ // (Src0 < 0) ? Pow2 - 1 : 0;
+ if (!emitICmp_ri(VT, Src0Reg, /*IsKill=*/false, 0))
+ return false;
+
+ unsigned SelectOpc;
+ const TargetRegisterClass *RC;
+ if (VT == MVT::i64) {
+ SelectOpc = AArch64::CSELXr;
+ RC = &AArch64::GPR64RegClass;
+ } else {
+ SelectOpc = AArch64::CSELWr;
+ RC = &AArch64::GPR32RegClass;
+ }
+ unsigned SelectReg =
+ fastEmitInst_rri(SelectOpc, RC, AddReg, /*IsKill=*/true, Src0Reg,
+ Src0IsKill, AArch64CC::LT);
+ if (!SelectReg)
+ return false;
+
+ // Divide by Pow2 --> ashr. If we're dividing by a negative value we must also
+ // negate the result.
+ unsigned ZeroReg = (VT == MVT::i64) ? AArch64::XZR : AArch64::WZR;
+ unsigned ResultReg;
+ if (C.isNegative())
+ ResultReg = emitAddSub_rs(/*UseAdd=*/false, VT, ZeroReg, /*IsKill=*/true,
+ SelectReg, /*IsKill=*/true, AArch64_AM::ASR, Lg2);
+ else
+ ResultReg = emitASR_ri(VT, VT, SelectReg, /*IsKill=*/true, Lg2);
+
+ if (!ResultReg)
+ return false;
+
+ updateValueMap(I, ResultReg);
+ return true;
+}
+
+/// This is mostly a copy of the existing FastISel GEP code, but we have to
+/// duplicate it for AArch64, because otherwise we would bail out even for
+/// simple cases. This is because the standard fastEmit functions don't cover
+/// MUL at all and ADD is lowered very inefficientily.
+bool AArch64FastISel::selectGetElementPtr(const Instruction *I) {
+ unsigned N = getRegForValue(I->getOperand(0));
+ if (!N)
+ return false;
+ bool NIsKill = hasTrivialKill(I->getOperand(0));
+
+ // Keep a running tab of the total offset to coalesce multiple N = N + Offset
+ // into a single N = N + TotalOffset.
+ uint64_t TotalOffs = 0;
+ Type *Ty = I->getOperand(0)->getType();
+ MVT VT = TLI.getPointerTy();
+ for (auto OI = std::next(I->op_begin()), E = I->op_end(); OI != E; ++OI) {
+ const Value *Idx = *OI;
+ if (auto *StTy = dyn_cast<StructType>(Ty)) {
+ unsigned Field = cast<ConstantInt>(Idx)->getZExtValue();
+ // N = N + Offset
+ if (Field)
+ TotalOffs += DL.getStructLayout(StTy)->getElementOffset(Field);
+ Ty = StTy->getElementType(Field);
+ } else {
+ Ty = cast<SequentialType>(Ty)->getElementType();
+ // If this is a constant subscript, handle it quickly.
+ if (const auto *CI = dyn_cast<ConstantInt>(Idx)) {
+ if (CI->isZero())
+ continue;
+ // N = N + Offset
+ TotalOffs +=
+ DL.getTypeAllocSize(Ty) * cast<ConstantInt>(CI)->getSExtValue();
+ continue;
+ }
+ if (TotalOffs) {
+ N = emitAdd_ri_(VT, N, NIsKill, TotalOffs);
+ if (!N)
+ return false;
+ NIsKill = true;
+ TotalOffs = 0;
+ }
+
+ // N = N + Idx * ElementSize;
+ uint64_t ElementSize = DL.getTypeAllocSize(Ty);
+ std::pair<unsigned, bool> Pair = getRegForGEPIndex(Idx);
+ unsigned IdxN = Pair.first;
+ bool IdxNIsKill = Pair.second;
+ if (!IdxN)
+ return false;
+
+ if (ElementSize != 1) {
+ unsigned C = fastEmit_i(VT, VT, ISD::Constant, ElementSize);
+ if (!C)
+ return false;
+ IdxN = emitMul_rr(VT, IdxN, IdxNIsKill, C, true);
+ if (!IdxN)
+ return false;
+ IdxNIsKill = true;
+ }
+ N = fastEmit_rr(VT, VT, ISD::ADD, N, NIsKill, IdxN, IdxNIsKill);
+ if (!N)
+ return false;
+ }
+ }
+ if (TotalOffs) {
+ N = emitAdd_ri_(VT, N, NIsKill, TotalOffs);
+ if (!N)
+ return false;
+ }
+ updateValueMap(I, N);
+ return true;
+}
+
bool AArch64FastISel::fastSelectInstruction(const Instruction *I) {
switch (I->getOpcode()) {
default:
case Instruction::Sub:
return selectAddSub(I);
case Instruction::Mul:
- if (!selectBinaryOp(I, ISD::MUL))
- return SelectMul(I);
- return true;
+ return selectMul(I);
+ case Instruction::SDiv:
+ return selectSDiv(I);
case Instruction::SRem:
if (!selectBinaryOp(I, ISD::SREM))
- return SelectRem(I, ISD::SREM);
+ return selectRem(I, ISD::SREM);
return true;
case Instruction::URem:
if (!selectBinaryOp(I, ISD::UREM))
- return SelectRem(I, ISD::UREM);
+ return selectRem(I, ISD::UREM);
return true;
case Instruction::Shl:
case Instruction::LShr:
case Instruction::AShr:
- return SelectShift(I);
+ return selectShift(I);
case Instruction::And:
case Instruction::Or:
case Instruction::Xor:
return selectLogicalOp(I);
case Instruction::Br:
- return SelectBranch(I);
+ return selectBranch(I);
case Instruction::IndirectBr:
- return SelectIndirectBr(I);
+ return selectIndirectBr(I);
case Instruction::BitCast:
if (!FastISel::selectBitCast(I))
- return SelectBitCast(I);
+ return selectBitCast(I);
return true;
case Instruction::FPToSI:
if (!selectCast(I, ISD::FP_TO_SINT))
- return SelectFPToInt(I, /*Signed=*/true);
+ return selectFPToInt(I, /*Signed=*/true);
return true;
case Instruction::FPToUI:
- return SelectFPToInt(I, /*Signed=*/false);
+ 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;
+ return selectIntExt(I);
case Instruction::Trunc:
if (!selectCast(I, ISD::TRUNCATE))
- return SelectTrunc(I);
+ return selectTrunc(I);
return true;
case Instruction::FPExt:
- return SelectFPExt(I);
+ return selectFPExt(I);
case Instruction::FPTrunc:
- return SelectFPTrunc(I);
+ return selectFPTrunc(I);
case Instruction::SIToFP:
if (!selectCast(I, ISD::SINT_TO_FP))
- return SelectIntToFP(I, /*Signed=*/true);
+ return selectIntToFP(I, /*Signed=*/true);
return true;
case Instruction::UIToFP:
- return SelectIntToFP(I, /*Signed=*/false);
+ return selectIntToFP(I, /*Signed=*/false);
case Instruction::Load:
- return SelectLoad(I);
+ return selectLoad(I);
case Instruction::Store:
- return SelectStore(I);
+ return selectStore(I);
case Instruction::FCmp:
case Instruction::ICmp:
- return SelectCmp(I);
+ return selectCmp(I);
case Instruction::Select:
- return SelectSelect(I);
+ return selectSelect(I);
case Instruction::Ret:
- return SelectRet(I);
+ return selectRet(I);
case Instruction::FRem:
return selectFRem(I);
+ case Instruction::GetElementPtr:
+ return selectGetElementPtr(I);
}
// fall-back to target-independent instruction selection.
}
namespace llvm {
-llvm::FastISel *AArch64::createFastISel(FunctionLoweringInfo &funcInfo,
- const TargetLibraryInfo *libInfo) {
- return new AArch64FastISel(funcInfo, libInfo);
+llvm::FastISel *AArch64::createFastISel(FunctionLoweringInfo &FuncInfo,
+ const TargetLibraryInfo *LibInfo) {
+ return new AArch64FastISel(FuncInfo, LibInfo);
}
}
projects / oota-llvm.git / blobdiff