AArch64TargetLowering::AArch64TargetLowering(AArch64TargetMachine &TM)
: TargetLowering(TM, createTLOF(TM)), Itins(TM.getInstrItineraryData()) {
+ const AArch64Subtarget *Subtarget = &TM.getSubtarget<AArch64Subtarget>();
+
// SIMD compares set the entire lane's bits to 1
setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
// Scalar register <-> type mapping
addRegisterClass(MVT::i32, &AArch64::GPR32RegClass);
addRegisterClass(MVT::i64, &AArch64::GPR64RegClass);
- addRegisterClass(MVT::f16, &AArch64::FPR16RegClass);
- addRegisterClass(MVT::f32, &AArch64::FPR32RegClass);
- addRegisterClass(MVT::f64, &AArch64::FPR64RegClass);
- addRegisterClass(MVT::f128, &AArch64::FPR128RegClass);
+
+ if (Subtarget->hasFPARMv8()) {
+ addRegisterClass(MVT::f16, &AArch64::FPR16RegClass);
+ addRegisterClass(MVT::f32, &AArch64::FPR32RegClass);
+ addRegisterClass(MVT::f64, &AArch64::FPR64RegClass);
+ addRegisterClass(MVT::f128, &AArch64::FPR128RegClass);
+ }
+
+ if (Subtarget->hasNEON()) {
+ // And the vectors
+ addRegisterClass(MVT::v1i8, &AArch64::FPR8RegClass);
+ addRegisterClass(MVT::v1i16, &AArch64::FPR16RegClass);
+ addRegisterClass(MVT::v1i32, &AArch64::FPR32RegClass);
+ addRegisterClass(MVT::v1i64, &AArch64::FPR64RegClass);
+ addRegisterClass(MVT::v1f32, &AArch64::FPR32RegClass);
+ addRegisterClass(MVT::v1f64, &AArch64::FPR64RegClass);
+ addRegisterClass(MVT::v8i8, &AArch64::FPR64RegClass);
+ addRegisterClass(MVT::v4i16, &AArch64::FPR64RegClass);
+ addRegisterClass(MVT::v2i32, &AArch64::FPR64RegClass);
+ addRegisterClass(MVT::v1i64, &AArch64::FPR64RegClass);
+ addRegisterClass(MVT::v2f32, &AArch64::FPR64RegClass);
+ addRegisterClass(MVT::v16i8, &AArch64::FPR128RegClass);
+ addRegisterClass(MVT::v8i16, &AArch64::FPR128RegClass);
+ addRegisterClass(MVT::v4i32, &AArch64::FPR128RegClass);
+ addRegisterClass(MVT::v2i64, &AArch64::FPR128RegClass);
+ addRegisterClass(MVT::v4f32, &AArch64::FPR128RegClass);
+ addRegisterClass(MVT::v2f64, &AArch64::FPR128RegClass);
+ }
computeRegisterProperties();
setTargetDAGCombine(ISD::AND);
setTargetDAGCombine(ISD::SRA);
+ setTargetDAGCombine(ISD::SRL);
+ setTargetDAGCombine(ISD::SHL);
+
+ setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
+ setTargetDAGCombine(ISD::INTRINSIC_VOID);
+ setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
// AArch64 does not have i1 loads, or much of anything for i1 really.
setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
setTruncStoreAction(MVT::f64, MVT::f16, Expand);
setTruncStoreAction(MVT::f32, MVT::f16, Expand);
- setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
- setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
-
setExceptionPointerRegister(AArch64::X0);
setExceptionSelectorRegister(AArch64::X1);
+
+ if (Subtarget->hasNEON()) {
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v1i8, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v8i8, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v16i8, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v1i16, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v4i16, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v8i16, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v1i32, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v2i32, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v4i32, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v1i64, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v1f32, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v2f32, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v1f64, Custom);
+ setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
+
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v8i8, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v16i8, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4i16, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v8i16, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i32, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4i32, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v1i64, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f32, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v1f64, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
+
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i8, Legal);
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Legal);
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Legal);
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Legal);
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Legal);
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Legal);
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Legal);
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f32, Legal);
+ setOperationAction(ISD::CONCAT_VECTORS, MVT::v2f64, Legal);
+
+ setOperationAction(ISD::SETCC, MVT::v8i8, Custom);
+ setOperationAction(ISD::SETCC, MVT::v16i8, Custom);
+ setOperationAction(ISD::SETCC, MVT::v4i16, Custom);
+ setOperationAction(ISD::SETCC, MVT::v8i16, Custom);
+ setOperationAction(ISD::SETCC, MVT::v2i32, Custom);
+ setOperationAction(ISD::SETCC, MVT::v4i32, Custom);
+ setOperationAction(ISD::SETCC, MVT::v1i64, Custom);
+ setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
+ setOperationAction(ISD::SETCC, MVT::v1f32, Custom);
+ setOperationAction(ISD::SETCC, MVT::v2f32, Custom);
+ setOperationAction(ISD::SETCC, MVT::v4f32, Custom);
+ setOperationAction(ISD::SETCC, MVT::v1f64, Custom);
+ setOperationAction(ISD::SETCC, MVT::v2f64, Custom);
+
+ setOperationAction(ISD::FFLOOR, MVT::v2f32, Legal);
+ setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
+ setOperationAction(ISD::FFLOOR, MVT::v1f64, Legal);
+ setOperationAction(ISD::FFLOOR, MVT::v2f64, Legal);
+
+ setOperationAction(ISD::FCEIL, MVT::v2f32, Legal);
+ setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
+ setOperationAction(ISD::FCEIL, MVT::v1f64, Legal);
+ setOperationAction(ISD::FCEIL, MVT::v2f64, Legal);
+
+ setOperationAction(ISD::FTRUNC, MVT::v2f32, Legal);
+ setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
+ setOperationAction(ISD::FTRUNC, MVT::v1f64, Legal);
+ setOperationAction(ISD::FTRUNC, MVT::v2f64, Legal);
+
+ setOperationAction(ISD::FRINT, MVT::v2f32, Legal);
+ setOperationAction(ISD::FRINT, MVT::v4f32, Legal);
+ setOperationAction(ISD::FRINT, MVT::v1f64, Legal);
+ setOperationAction(ISD::FRINT, MVT::v2f64, Legal);
+
+ setOperationAction(ISD::FNEARBYINT, MVT::v2f32, Legal);
+ setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
+ setOperationAction(ISD::FNEARBYINT, MVT::v1f64, Legal);
+ setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Legal);
+
+ setOperationAction(ISD::FROUND, MVT::v2f32, Legal);
+ setOperationAction(ISD::FROUND, MVT::v4f32, Legal);
+ setOperationAction(ISD::FROUND, MVT::v1f64, Legal);
+ setOperationAction(ISD::FROUND, MVT::v2f64, Legal);
+ }
}
EVT AArch64TargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
static void getExclusiveOperation(unsigned Size, AtomicOrdering Ord,
unsigned &LdrOpc,
unsigned &StrOpc) {
- static unsigned LoadBares[] = {AArch64::LDXR_byte, AArch64::LDXR_hword,
- AArch64::LDXR_word, AArch64::LDXR_dword};
- static unsigned LoadAcqs[] = {AArch64::LDAXR_byte, AArch64::LDAXR_hword,
- AArch64::LDAXR_word, AArch64::LDAXR_dword};
- static unsigned StoreBares[] = {AArch64::STXR_byte, AArch64::STXR_hword,
- AArch64::STXR_word, AArch64::STXR_dword};
- static unsigned StoreRels[] = {AArch64::STLXR_byte, AArch64::STLXR_hword,
- AArch64::STLXR_word, AArch64::STLXR_dword};
-
- unsigned *LoadOps, *StoreOps;
+ static const unsigned LoadBares[] = {AArch64::LDXR_byte, AArch64::LDXR_hword,
+ AArch64::LDXR_word, AArch64::LDXR_dword};
+ static const unsigned LoadAcqs[] = {AArch64::LDAXR_byte, AArch64::LDAXR_hword,
+ AArch64::LDAXR_word, AArch64::LDAXR_dword};
+ static const unsigned StoreBares[] = {AArch64::STXR_byte, AArch64::STXR_hword,
+ AArch64::STXR_word, AArch64::STXR_dword};
+ static const unsigned StoreRels[] = {AArch64::STLXR_byte,AArch64::STLXR_hword,
+ AArch64::STLXR_word, AArch64::STLXR_dword};
+
+ const unsigned *LoadOps, *StoreOps;
if (Ord == Acquire || Ord == AcquireRelease || Ord == SequentiallyConsistent)
LoadOps = LoadAcqs;
else
StrOpc = StoreOps[Log2_32(Size)];
}
+// FIXME: AArch64::DTripleRegClass and AArch64::QTripleRegClass don't really
+// have value type mapped, and they are both being defined as MVT::untyped.
+// Without knowing the MVT type, MachineLICM::getRegisterClassIDAndCost
+// would fail to figure out the register pressure correctly.
+std::pair<const TargetRegisterClass*, uint8_t>
+AArch64TargetLowering::findRepresentativeClass(MVT VT) const{
+ const TargetRegisterClass *RRC = 0;
+ uint8_t Cost = 1;
+ switch (VT.SimpleTy) {
+ default:
+ return TargetLowering::findRepresentativeClass(VT);
+ case MVT::v4i64:
+ RRC = &AArch64::QPairRegClass;
+ Cost = 2;
+ break;
+ case MVT::v8i64:
+ RRC = &AArch64::QQuadRegClass;
+ Cost = 4;
+ break;
+ }
+ return std::make_pair(RRC, Cost);
+}
+
MachineBasicBlock *
AArch64TargetLowering::emitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
unsigned Size,
MBB->addSuccessor(TrueBB);
MBB->addSuccessor(EndBB);
+ if (!NZCVKilled) {
+ // NZCV is live-through TrueBB.
+ TrueBB->addLiveIn(AArch64::NZCV);
+ EndBB->addLiveIn(AArch64::NZCV);
+ }
+
// IfTrue:
// str qIFTRUE, [sp]
BuildMI(TrueBB, DL, TII->get(AArch64::LSFP128_STR))
// Done:
// ldr qDEST, [sp]
// [... rest of incoming MBB ...]
- if (!NZCVKilled)
- EndBB->addLiveIn(AArch64::NZCV);
MachineInstr *StartOfEnd = EndBB->begin();
BuildMI(*EndBB, StartOfEnd, DL, TII->get(AArch64::LSFP128_LDR), DestReg)
.addFrameIndex(ScratchFI)
case AArch64ISD::WrapperLarge: return "AArch64ISD::WrapperLarge";
case AArch64ISD::WrapperSmall: return "AArch64ISD::WrapperSmall";
- default: return NULL;
+ case AArch64ISD::NEON_BSL:
+ return "AArch64ISD::NEON_BSL";
+ case AArch64ISD::NEON_MOVIMM:
+ return "AArch64ISD::NEON_MOVIMM";
+ case AArch64ISD::NEON_MVNIMM:
+ return "AArch64ISD::NEON_MVNIMM";
+ case AArch64ISD::NEON_FMOVIMM:
+ return "AArch64ISD::NEON_FMOVIMM";
+ case AArch64ISD::NEON_CMP:
+ return "AArch64ISD::NEON_CMP";
+ case AArch64ISD::NEON_CMPZ:
+ return "AArch64ISD::NEON_CMPZ";
+ case AArch64ISD::NEON_TST:
+ return "AArch64ISD::NEON_TST";
+ case AArch64ISD::NEON_QSHLs:
+ return "AArch64ISD::NEON_QSHLs";
+ case AArch64ISD::NEON_QSHLu:
+ return "AArch64ISD::NEON_QSHLu";
+ case AArch64ISD::NEON_VDUP:
+ return "AArch64ISD::NEON_VDUP";
+ case AArch64ISD::NEON_VDUPLANE:
+ return "AArch64ISD::NEON_VDUPLANE";
+ case AArch64ISD::NEON_REV16:
+ return "AArch64ISD::NEON_REV16";
+ case AArch64ISD::NEON_REV32:
+ return "AArch64ISD::NEON_REV32";
+ case AArch64ISD::NEON_REV64:
+ return "AArch64ISD::NEON_REV64";
+ case AArch64ISD::NEON_UZP1:
+ return "AArch64ISD::NEON_UZP1";
+ case AArch64ISD::NEON_UZP2:
+ return "AArch64ISD::NEON_UZP2";
+ case AArch64ISD::NEON_ZIP1:
+ return "AArch64ISD::NEON_ZIP1";
+ case AArch64ISD::NEON_ZIP2:
+ return "AArch64ISD::NEON_ZIP2";
+ case AArch64ISD::NEON_TRN1:
+ return "AArch64ISD::NEON_TRN1";
+ case AArch64ISD::NEON_TRN2:
+ return "AArch64ISD::NEON_TRN2";
+ case AArch64ISD::NEON_LD1_UPD:
+ return "AArch64ISD::NEON_LD1_UPD";
+ case AArch64ISD::NEON_LD2_UPD:
+ return "AArch64ISD::NEON_LD2_UPD";
+ case AArch64ISD::NEON_LD3_UPD:
+ return "AArch64ISD::NEON_LD3_UPD";
+ case AArch64ISD::NEON_LD4_UPD:
+ return "AArch64ISD::NEON_LD4_UPD";
+ case AArch64ISD::NEON_ST1_UPD:
+ return "AArch64ISD::NEON_ST1_UPD";
+ case AArch64ISD::NEON_ST2_UPD:
+ return "AArch64ISD::NEON_ST2_UPD";
+ case AArch64ISD::NEON_ST3_UPD:
+ return "AArch64ISD::NEON_ST3_UPD";
+ case AArch64ISD::NEON_ST4_UPD:
+ return "AArch64ISD::NEON_ST4_UPD";
+ case AArch64ISD::NEON_LD1x2_UPD:
+ return "AArch64ISD::NEON_LD1x2_UPD";
+ case AArch64ISD::NEON_LD1x3_UPD:
+ return "AArch64ISD::NEON_LD1x3_UPD";
+ case AArch64ISD::NEON_LD1x4_UPD:
+ return "AArch64ISD::NEON_LD1x4_UPD";
+ case AArch64ISD::NEON_ST1x2_UPD:
+ return "AArch64ISD::NEON_ST1x2_UPD";
+ case AArch64ISD::NEON_ST1x3_UPD:
+ return "AArch64ISD::NEON_ST1x3_UPD";
+ case AArch64ISD::NEON_ST1x4_UPD:
+ return "AArch64ISD::NEON_ST1x4_UPD";
+ case AArch64ISD::NEON_LD2DUP:
+ return "AArch64ISD::NEON_LD2DUP";
+ case AArch64ISD::NEON_LD3DUP:
+ return "AArch64ISD::NEON_LD3DUP";
+ case AArch64ISD::NEON_LD4DUP:
+ return "AArch64ISD::NEON_LD4DUP";
+ case AArch64ISD::NEON_LD2DUP_UPD:
+ return "AArch64ISD::NEON_LD2DUP_UPD";
+ case AArch64ISD::NEON_LD3DUP_UPD:
+ return "AArch64ISD::NEON_LD3DUP_UPD";
+ case AArch64ISD::NEON_LD4DUP_UPD:
+ return "AArch64ISD::NEON_LD4DUP_UPD";
+ case AArch64ISD::NEON_LD2LN_UPD:
+ return "AArch64ISD::NEON_LD2LN_UPD";
+ case AArch64ISD::NEON_LD3LN_UPD:
+ return "AArch64ISD::NEON_LD3LN_UPD";
+ case AArch64ISD::NEON_LD4LN_UPD:
+ return "AArch64ISD::NEON_LD4LN_UPD";
+ case AArch64ISD::NEON_ST2LN_UPD:
+ return "AArch64ISD::NEON_ST2LN_UPD";
+ case AArch64ISD::NEON_ST3LN_UPD:
+ return "AArch64ISD::NEON_ST3LN_UPD";
+ case AArch64ISD::NEON_ST4LN_UPD:
+ return "AArch64ISD::NEON_ST4LN_UPD";
+ case AArch64ISD::NEON_VEXTRACT:
+ return "AArch64ISD::NEON_VEXTRACT";
+ default:
+ return NULL;
}
}
}
}
+ if (getSubtarget()->hasFPARMv8()) {
unsigned FPRSaveSize = 16 * (NumFPRArgRegs - FirstVariadicFPR);
int FPRIdx = 0;
- if (FPRSaveSize != 0) {
- FPRIdx = MFI->CreateStackObject(FPRSaveSize, 16, false);
-
- SDValue FIN = DAG.getFrameIndex(FPRIdx, getPointerTy());
-
- for (unsigned i = FirstVariadicFPR; i < NumFPRArgRegs; ++i) {
- unsigned VReg = MF.addLiveIn(AArch64FPRArgRegs[i],
- &AArch64::FPR128RegClass);
- SDValue Val = DAG.getCopyFromReg(Chain, DL, VReg, MVT::f128);
- SDValue Store = DAG.getStore(Val.getValue(1), DL, Val, FIN,
- MachinePointerInfo::getStack(i * 16),
- false, false, 0);
- MemOps.push_back(Store);
- FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(), FIN,
- DAG.getConstant(16, getPointerTy()));
+ // According to the AArch64 Procedure Call Standard, section B.1/B.3, we
+ // can omit a register save area if we know we'll never use registers of
+ // that class.
+ if (FPRSaveSize != 0) {
+ FPRIdx = MFI->CreateStackObject(FPRSaveSize, 16, false);
+
+ SDValue FIN = DAG.getFrameIndex(FPRIdx, getPointerTy());
+
+ for (unsigned i = FirstVariadicFPR; i < NumFPRArgRegs; ++i) {
+ unsigned VReg = MF.addLiveIn(AArch64FPRArgRegs[i],
+ &AArch64::FPR128RegClass);
+ SDValue Val = DAG.getCopyFromReg(Chain, DL, VReg, MVT::f128);
+ SDValue Store = DAG.getStore(Val.getValue(1), DL, Val, FIN,
+ MachinePointerInfo::getStack(i * 16),
+ false, false, 0);
+ MemOps.push_back(Store);
+ FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(), FIN,
+ DAG.getConstant(16, getPointerTy()));
+ }
}
+ FuncInfo->setVariadicFPRIdx(FPRIdx);
+ FuncInfo->setVariadicFPRSize(FPRSaveSize);
}
int StackIdx = MFI->CreateFixedObject(8, CCInfo.getNextStackOffset(), true);
FuncInfo->setVariadicStackIdx(StackIdx);
FuncInfo->setVariadicGPRIdx(GPRIdx);
FuncInfo->setVariadicGPRSize(GPRSaveSize);
- FuncInfo->setVariadicFPRIdx(FPRIdx);
- FuncInfo->setVariadicFPRSize(FPRSaveSize);
if (!MemOps.empty()) {
Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, &MemOps[0],
SmallVectorImpl<SDValue> &InVals) const {
SelectionDAG &DAG = CLI.DAG;
SDLoc &dl = CLI.DL;
- SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
- SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
- SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
+ SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
+ SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
+ SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
SDValue Chain = CLI.Chain;
SDValue Callee = CLI.Callee;
bool &IsTailCall = CLI.IsTailCall;
SDValue SrcVal = Op.getOperand(0);
return makeLibCall(DAG, LC, Op.getValueType(), &SrcVal, 1,
- /*isSigned*/ false, SDLoc(Op));
+ /*isSigned*/ false, SDLoc(Op)).first;
}
SDValue
return LowerF128ToCall(Op, DAG, LC);
}
+SDValue AArch64TargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{
+ MachineFunction &MF = DAG.getMachineFunction();
+ MachineFrameInfo *MFI = MF.getFrameInfo();
+ MFI->setReturnAddressIsTaken(true);
+
+ EVT VT = Op.getValueType();
+ SDLoc dl(Op);
+ unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+ if (Depth) {
+ SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
+ SDValue Offset = DAG.getConstant(8, MVT::i64);
+ return DAG.getLoad(VT, dl, DAG.getEntryNode(),
+ DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
+ MachinePointerInfo(), false, false, false, 0);
+ }
+
+ // Return X30, which contains the return address. Mark it an implicit live-in.
+ unsigned Reg = MF.addLiveIn(AArch64::X30, getRegClassFor(MVT::i64));
+ return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, MVT::i64);
+}
+
+
+SDValue AArch64TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG)
+ const {
+ MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
+ MFI->setFrameAddressIsTaken(true);
+
+ EVT VT = Op.getValueType();
+ SDLoc dl(Op);
+ unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+ unsigned FrameReg = AArch64::X29;
+ SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
+ while (Depth--)
+ FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
+ MachinePointerInfo(),
+ false, false, false, 0);
+ return FrameAddr;
+}
+
SDValue
AArch64TargetLowering::LowerGlobalAddressELFLarge(SDValue Op,
SelectionDAG &DAG) const {
AArch64II::MO_TPREL_G0_NC);
TPOff = SDValue(DAG.getMachineNode(AArch64::MOVZxii, DL, PtrVT, HiVar,
- DAG.getTargetConstant(0, MVT::i32)), 0);
+ DAG.getTargetConstant(1, MVT::i32)), 0);
TPOff = SDValue(DAG.getMachineNode(AArch64::MOVKxii, DL, PtrVT,
TPOff, LoVar,
DAG.getTargetConstant(0, MVT::i32)), 0);
DAG.getConstant(A64CC::NE, MVT::i32));
}
+static SDValue LowerVectorSETCC(SDValue Op, SelectionDAG &DAG) {
+ SDLoc DL(Op);
+ SDValue LHS = Op.getOperand(0);
+ SDValue RHS = Op.getOperand(1);
+ ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
+ EVT VT = Op.getValueType();
+ bool Invert = false;
+ SDValue Op0, Op1;
+ unsigned Opcode;
+
+ if (LHS.getValueType().isInteger()) {
+
+ // Attempt to use Vector Integer Compare Mask Test instruction.
+ // TST = icmp ne (and (op0, op1), zero).
+ if (CC == ISD::SETNE) {
+ if (((LHS.getOpcode() == ISD::AND) &&
+ ISD::isBuildVectorAllZeros(RHS.getNode())) ||
+ ((RHS.getOpcode() == ISD::AND) &&
+ ISD::isBuildVectorAllZeros(LHS.getNode()))) {
+
+ SDValue AndOp = (LHS.getOpcode() == ISD::AND) ? LHS : RHS;
+ SDValue NewLHS = DAG.getNode(ISD::BITCAST, DL, VT, AndOp.getOperand(0));
+ SDValue NewRHS = DAG.getNode(ISD::BITCAST, DL, VT, AndOp.getOperand(1));
+ return DAG.getNode(AArch64ISD::NEON_TST, DL, VT, NewLHS, NewRHS);
+ }
+ }
+
+ // Attempt to use Vector Integer Compare Mask against Zero instr (Signed).
+ // Note: Compare against Zero does not support unsigned predicates.
+ if ((ISD::isBuildVectorAllZeros(RHS.getNode()) ||
+ ISD::isBuildVectorAllZeros(LHS.getNode())) &&
+ !isUnsignedIntSetCC(CC)) {
+
+ // If LHS is the zero value, swap operands and CondCode.
+ if (ISD::isBuildVectorAllZeros(LHS.getNode())) {
+ CC = getSetCCSwappedOperands(CC);
+ Op0 = RHS;
+ } else
+ Op0 = LHS;
+
+ // Ensure valid CondCode for Compare Mask against Zero instruction:
+ // EQ, GE, GT, LE, LT.
+ if (ISD::SETNE == CC) {
+ Invert = true;
+ CC = ISD::SETEQ;
+ }
+
+ // Using constant type to differentiate integer and FP compares with zero.
+ Op1 = DAG.getConstant(0, MVT::i32);
+ Opcode = AArch64ISD::NEON_CMPZ;
+
+ } else {
+ // Attempt to use Vector Integer Compare Mask instr (Signed/Unsigned).
+ // Ensure valid CondCode for Compare Mask instr: EQ, GE, GT, UGE, UGT.
+ bool Swap = false;
+ switch (CC) {
+ default:
+ llvm_unreachable("Illegal integer comparison.");
+ case ISD::SETEQ:
+ case ISD::SETGT:
+ case ISD::SETGE:
+ case ISD::SETUGT:
+ case ISD::SETUGE:
+ break;
+ case ISD::SETNE:
+ Invert = true;
+ CC = ISD::SETEQ;
+ break;
+ case ISD::SETULT:
+ case ISD::SETULE:
+ case ISD::SETLT:
+ case ISD::SETLE:
+ Swap = true;
+ CC = getSetCCSwappedOperands(CC);
+ }
+
+ if (Swap)
+ std::swap(LHS, RHS);
+
+ Opcode = AArch64ISD::NEON_CMP;
+ Op0 = LHS;
+ Op1 = RHS;
+ }
+
+ // Generate Compare Mask instr or Compare Mask against Zero instr.
+ SDValue NeonCmp =
+ DAG.getNode(Opcode, DL, VT, Op0, Op1, DAG.getCondCode(CC));
+
+ if (Invert)
+ NeonCmp = DAG.getNOT(DL, NeonCmp, VT);
+
+ return NeonCmp;
+ }
+
+ // Now handle Floating Point cases.
+ // Attempt to use Vector Floating Point Compare Mask against Zero instruction.
+ if (ISD::isBuildVectorAllZeros(RHS.getNode()) ||
+ ISD::isBuildVectorAllZeros(LHS.getNode())) {
+
+ // If LHS is the zero value, swap operands and CondCode.
+ if (ISD::isBuildVectorAllZeros(LHS.getNode())) {
+ CC = getSetCCSwappedOperands(CC);
+ Op0 = RHS;
+ } else
+ Op0 = LHS;
+
+ // Using constant type to differentiate integer and FP compares with zero.
+ Op1 = DAG.getConstantFP(0, MVT::f32);
+ Opcode = AArch64ISD::NEON_CMPZ;
+ } else {
+ // Attempt to use Vector Floating Point Compare Mask instruction.
+ Op0 = LHS;
+ Op1 = RHS;
+ Opcode = AArch64ISD::NEON_CMP;
+ }
+
+ SDValue NeonCmpAlt;
+ // Some register compares have to be implemented with swapped CC and operands,
+ // e.g.: OLT implemented as OGT with swapped operands.
+ bool SwapIfRegArgs = false;
+
+ // Ensure valid CondCode for FP Compare Mask against Zero instruction:
+ // EQ, GE, GT, LE, LT.
+ // And ensure valid CondCode for FP Compare Mask instruction: EQ, GE, GT.
+ switch (CC) {
+ default:
+ llvm_unreachable("Illegal FP comparison");
+ case ISD::SETUNE:
+ case ISD::SETNE:
+ Invert = true; // Fallthrough
+ case ISD::SETOEQ:
+ case ISD::SETEQ:
+ CC = ISD::SETEQ;
+ break;
+ case ISD::SETOLT:
+ case ISD::SETLT:
+ CC = ISD::SETLT;
+ SwapIfRegArgs = true;
+ break;
+ case ISD::SETOGT:
+ case ISD::SETGT:
+ CC = ISD::SETGT;
+ break;
+ case ISD::SETOLE:
+ case ISD::SETLE:
+ CC = ISD::SETLE;
+ SwapIfRegArgs = true;
+ break;
+ case ISD::SETOGE:
+ case ISD::SETGE:
+ CC = ISD::SETGE;
+ break;
+ case ISD::SETUGE:
+ Invert = true;
+ CC = ISD::SETLT;
+ SwapIfRegArgs = true;
+ break;
+ case ISD::SETULE:
+ Invert = true;
+ CC = ISD::SETGT;
+ break;
+ case ISD::SETUGT:
+ Invert = true;
+ CC = ISD::SETLE;
+ SwapIfRegArgs = true;
+ break;
+ case ISD::SETULT:
+ Invert = true;
+ CC = ISD::SETGE;
+ break;
+ case ISD::SETUEQ:
+ Invert = true; // Fallthrough
+ case ISD::SETONE:
+ // Expand this to (OGT |OLT).
+ NeonCmpAlt =
+ DAG.getNode(Opcode, DL, VT, Op0, Op1, DAG.getCondCode(ISD::SETGT));
+ CC = ISD::SETLT;
+ SwapIfRegArgs = true;
+ break;
+ case ISD::SETUO:
+ Invert = true; // Fallthrough
+ case ISD::SETO:
+ // Expand this to (OGE | OLT).
+ NeonCmpAlt =
+ DAG.getNode(Opcode, DL, VT, Op0, Op1, DAG.getCondCode(ISD::SETGE));
+ CC = ISD::SETLT;
+ SwapIfRegArgs = true;
+ break;
+ }
+
+ if (Opcode == AArch64ISD::NEON_CMP && SwapIfRegArgs) {
+ CC = getSetCCSwappedOperands(CC);
+ std::swap(Op0, Op1);
+ }
+
+ // Generate FP Compare Mask instr or FP Compare Mask against Zero instr
+ SDValue NeonCmp = DAG.getNode(Opcode, DL, VT, Op0, Op1, DAG.getCondCode(CC));
+
+ if (NeonCmpAlt.getNode())
+ NeonCmp = DAG.getNode(ISD::OR, DL, VT, NeonCmp, NeonCmpAlt);
+
+ if (Invert)
+ NeonCmp = DAG.getNOT(DL, NeonCmp, VT);
+
+ return NeonCmp;
+}
+
// (SETCC lhs, rhs, condcode)
SDValue
AArch64TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
EVT VT = Op.getValueType();
+ if (VT.isVector())
+ return LowerVectorSETCC(Op, DAG);
+
if (LHS.getValueType() == MVT::f128) {
// f128 comparisons will be lowered to libcalls giving a valid LHS and RHS
// for the rest of the function (some i32 or i64 values).
case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG, false);
case ISD::FP_ROUND: return LowerFP_ROUND(Op, DAG);
case ISD::FP_EXTEND: return LowerFP_EXTEND(Op, DAG);
+ case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
+ case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
case ISD::BRCOND: return LowerBRCOND(Op, DAG);
case ISD::SETCC: return LowerSETCC(Op, DAG);
case ISD::VACOPY: return LowerVACOPY(Op, DAG);
case ISD::VASTART: return LowerVASTART(Op, DAG);
+ case ISD::BUILD_VECTOR:
+ return LowerBUILD_VECTOR(Op, DAG, getSubtarget());
+ case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
}
return SDValue();
}
+/// Check if the specified splat value corresponds to a valid vector constant
+/// for a Neon instruction with a "modified immediate" operand (e.g., MOVI). If
+/// so, return the encoded 8-bit immediate and the OpCmode instruction fields
+/// values.
+static bool isNeonModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
+ unsigned SplatBitSize, SelectionDAG &DAG,
+ bool is128Bits, NeonModImmType type, EVT &VT,
+ unsigned &Imm, unsigned &OpCmode) {
+ switch (SplatBitSize) {
+ default:
+ llvm_unreachable("unexpected size for isNeonModifiedImm");
+ case 8: {
+ if (type != Neon_Mov_Imm)
+ return false;
+ assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
+ // Neon movi per byte: Op=0, Cmode=1110.
+ OpCmode = 0xe;
+ Imm = SplatBits;
+ VT = is128Bits ? MVT::v16i8 : MVT::v8i8;
+ break;
+ }
+ case 16: {
+ // Neon move inst per halfword
+ VT = is128Bits ? MVT::v8i16 : MVT::v4i16;
+ if ((SplatBits & ~0xff) == 0) {
+ // Value = 0x00nn is 0x00nn LSL 0
+ // movi: Op=0, Cmode=1000; mvni: Op=1, Cmode=1000
+ // bic: Op=1, Cmode=1001; orr: Op=0, Cmode=1001
+ // Op=x, Cmode=100y
+ Imm = SplatBits;
+ OpCmode = 0x8;
+ break;
+ }
+ if ((SplatBits & ~0xff00) == 0) {
+ // Value = 0xnn00 is 0x00nn LSL 8
+ // movi: Op=0, Cmode=1010; mvni: Op=1, Cmode=1010
+ // bic: Op=1, Cmode=1011; orr: Op=0, Cmode=1011
+ // Op=x, Cmode=101x
+ Imm = SplatBits >> 8;
+ OpCmode = 0xa;
+ break;
+ }
+ // can't handle any other
+ return false;
+ }
+
+ case 32: {
+ // First the LSL variants (MSL is unusable by some interested instructions).
+
+ // Neon move instr per word, shift zeros
+ VT = is128Bits ? MVT::v4i32 : MVT::v2i32;
+ if ((SplatBits & ~0xff) == 0) {
+ // Value = 0x000000nn is 0x000000nn LSL 0
+ // movi: Op=0, Cmode= 0000; mvni: Op=1, Cmode= 0000
+ // bic: Op=1, Cmode= 0001; orr: Op=0, Cmode= 0001
+ // Op=x, Cmode=000x
+ Imm = SplatBits;
+ OpCmode = 0;
+ break;
+ }
+ if ((SplatBits & ~0xff00) == 0) {
+ // Value = 0x0000nn00 is 0x000000nn LSL 8
+ // movi: Op=0, Cmode= 0010; mvni: Op=1, Cmode= 0010
+ // bic: Op=1, Cmode= 0011; orr : Op=0, Cmode= 0011
+ // Op=x, Cmode=001x
+ Imm = SplatBits >> 8;
+ OpCmode = 0x2;
+ break;
+ }
+ if ((SplatBits & ~0xff0000) == 0) {
+ // Value = 0x00nn0000 is 0x000000nn LSL 16
+ // movi: Op=0, Cmode= 0100; mvni: Op=1, Cmode= 0100
+ // bic: Op=1, Cmode= 0101; orr: Op=0, Cmode= 0101
+ // Op=x, Cmode=010x
+ Imm = SplatBits >> 16;
+ OpCmode = 0x4;
+ break;
+ }
+ if ((SplatBits & ~0xff000000) == 0) {
+ // Value = 0xnn000000 is 0x000000nn LSL 24
+ // movi: Op=0, Cmode= 0110; mvni: Op=1, Cmode= 0110
+ // bic: Op=1, Cmode= 0111; orr: Op=0, Cmode= 0111
+ // Op=x, Cmode=011x
+ Imm = SplatBits >> 24;
+ OpCmode = 0x6;
+ break;
+ }
+
+ // Now the MSL immediates.
+
+ // Neon move instr per word, shift ones
+ if ((SplatBits & ~0xffff) == 0 &&
+ ((SplatBits | SplatUndef) & 0xff) == 0xff) {
+ // Value = 0x0000nnff is 0x000000nn MSL 8
+ // movi: Op=0, Cmode= 1100; mvni: Op=1, Cmode= 1100
+ // Op=x, Cmode=1100
+ Imm = SplatBits >> 8;
+ OpCmode = 0xc;
+ break;
+ }
+ if ((SplatBits & ~0xffffff) == 0 &&
+ ((SplatBits | SplatUndef) & 0xffff) == 0xffff) {
+ // Value = 0x00nnffff is 0x000000nn MSL 16
+ // movi: Op=1, Cmode= 1101; mvni: Op=1, Cmode= 1101
+ // Op=x, Cmode=1101
+ Imm = SplatBits >> 16;
+ OpCmode = 0xd;
+ break;
+ }
+ // can't handle any other
+ return false;
+ }
+
+ case 64: {
+ if (type != Neon_Mov_Imm)
+ return false;
+ // Neon move instr bytemask, where each byte is either 0x00 or 0xff.
+ // movi Op=1, Cmode=1110.
+ OpCmode = 0x1e;
+ uint64_t BitMask = 0xff;
+ uint64_t Val = 0;
+ unsigned ImmMask = 1;
+ Imm = 0;
+ for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
+ if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
+ Val |= BitMask;
+ Imm |= ImmMask;
+ } else if ((SplatBits & BitMask) != 0) {
+ return false;
+ }
+ BitMask <<= 8;
+ ImmMask <<= 1;
+ }
+ SplatBits = Val;
+ VT = is128Bits ? MVT::v2i64 : MVT::v1i64;
+ break;
+ }
+ }
+
+ return true;
+}
+
static SDValue PerformANDCombine(SDNode *N,
TargetLowering::DAGCombinerInfo &DCI) {
const AArch64Subtarget *Subtarget) {
SelectionDAG &DAG = DCI.DAG;
+ SDLoc DL(N);
EVT VT = N->getValueType(0);
if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
if (Res.getNode())
return Res;
+ if (!Subtarget->hasNEON())
+ return SDValue();
+
+ // Attempt to use vector immediate-form BSL
+ // (or (and B, A), (and C, ~A)) => (VBSL A, B, C) when A is a constant.
+
+ SDValue N0 = N->getOperand(0);
+ if (N0.getOpcode() != ISD::AND)
+ return SDValue();
+
+ SDValue N1 = N->getOperand(1);
+ if (N1.getOpcode() != ISD::AND)
+ return SDValue();
+
+ if (VT.isVector() && DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
+ APInt SplatUndef;
+ unsigned SplatBitSize;
+ bool HasAnyUndefs;
+ BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(1));
+ APInt SplatBits0;
+ if (BVN0 && BVN0->isConstantSplat(SplatBits0, SplatUndef, SplatBitSize,
+ HasAnyUndefs) &&
+ !HasAnyUndefs) {
+ BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(1));
+ APInt SplatBits1;
+ if (BVN1 && BVN1->isConstantSplat(SplatBits1, SplatUndef, SplatBitSize,
+ HasAnyUndefs) &&
+ !HasAnyUndefs && SplatBits0 == ~SplatBits1) {
+ // Canonicalize the vector type to make instruction selection simpler.
+ EVT CanonicalVT = VT.is128BitVector() ? MVT::v16i8 : MVT::v8i8;
+ SDValue Result = DAG.getNode(AArch64ISD::NEON_BSL, DL, CanonicalVT,
+ N0->getOperand(1), N0->getOperand(0),
+ N1->getOperand(0));
+ return DAG.getNode(ISD::BITCAST, DL, VT, Result);
+ }
+ }
+ }
+
return SDValue();
}
DAG.getConstant(LSB + Width - 1, MVT::i64));
}
+/// Check if this is a valid build_vector for the immediate operand of
+/// a vector shift operation, where all the elements of the build_vector
+/// must have the same constant integer value.
+static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
+ // Ignore bit_converts.
+ while (Op.getOpcode() == ISD::BITCAST)
+ Op = Op.getOperand(0);
+ BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
+ APInt SplatBits, SplatUndef;
+ unsigned SplatBitSize;
+ bool HasAnyUndefs;
+ if (!BVN || !BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
+ HasAnyUndefs, ElementBits) ||
+ SplatBitSize > ElementBits)
+ return false;
+ Cnt = SplatBits.getSExtValue();
+ return true;
+}
+
+/// Check if this is a valid build_vector for the immediate operand of
+/// a vector shift left operation. That value must be in the range:
+/// 0 <= Value < ElementBits
+static bool isVShiftLImm(SDValue Op, EVT VT, int64_t &Cnt) {
+ assert(VT.isVector() && "vector shift count is not a vector type");
+ unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
+ if (!getVShiftImm(Op, ElementBits, Cnt))
+ return false;
+ return (Cnt >= 0 && Cnt < ElementBits);
+}
+
+/// Check if this is a valid build_vector for the immediate operand of a
+/// vector shift right operation. The value must be in the range:
+/// 1 <= Value <= ElementBits
+static bool isVShiftRImm(SDValue Op, EVT VT, int64_t &Cnt) {
+ assert(VT.isVector() && "vector shift count is not a vector type");
+ unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
+ if (!getVShiftImm(Op, ElementBits, Cnt))
+ return false;
+ return (Cnt >= 1 && Cnt <= ElementBits);
+}
+
+/// Checks for immediate versions of vector shifts and lowers them.
+static SDValue PerformShiftCombine(SDNode *N,
+ TargetLowering::DAGCombinerInfo &DCI,
+ const AArch64Subtarget *ST) {
+ SelectionDAG &DAG = DCI.DAG;
+ EVT VT = N->getValueType(0);
+ if (N->getOpcode() == ISD::SRA && (VT == MVT::i32 || VT == MVT::i64))
+ return PerformSRACombine(N, DCI);
+
+ // Nothing to be done for scalar shifts.
+ const TargetLowering &TLI = DAG.getTargetLoweringInfo();
+ if (!VT.isVector() || !TLI.isTypeLegal(VT))
+ return SDValue();
+
+ assert(ST->hasNEON() && "unexpected vector shift");
+ int64_t Cnt;
+
+ switch (N->getOpcode()) {
+ default:
+ llvm_unreachable("unexpected shift opcode");
+
+ case ISD::SHL:
+ if (isVShiftLImm(N->getOperand(1), VT, Cnt)) {
+ SDValue RHS =
+ DAG.getNode(AArch64ISD::NEON_VDUP, SDLoc(N->getOperand(1)), VT,
+ DAG.getConstant(Cnt, MVT::i32));
+ return DAG.getNode(ISD::SHL, SDLoc(N), VT, N->getOperand(0), RHS);
+ }
+ break;
+
+ case ISD::SRA:
+ case ISD::SRL:
+ if (isVShiftRImm(N->getOperand(1), VT, Cnt)) {
+ SDValue RHS =
+ DAG.getNode(AArch64ISD::NEON_VDUP, SDLoc(N->getOperand(1)), VT,
+ DAG.getConstant(Cnt, MVT::i32));
+ return DAG.getNode(N->getOpcode(), SDLoc(N), VT, N->getOperand(0), RHS);
+ }
+ break;
+ }
+
+ return SDValue();
+}
+
+/// ARM-specific DAG combining for intrinsics.
+static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
+ unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
+
+ switch (IntNo) {
+ default:
+ // Don't do anything for most intrinsics.
+ break;
+
+ case Intrinsic::arm_neon_vqshifts:
+ case Intrinsic::arm_neon_vqshiftu:
+ EVT VT = N->getOperand(1).getValueType();
+ int64_t Cnt;
+ if (!isVShiftLImm(N->getOperand(2), VT, Cnt))
+ break;
+ unsigned VShiftOpc = (IntNo == Intrinsic::arm_neon_vqshifts)
+ ? AArch64ISD::NEON_QSHLs
+ : AArch64ISD::NEON_QSHLu;
+ return DAG.getNode(VShiftOpc, SDLoc(N), N->getValueType(0),
+ N->getOperand(1), DAG.getConstant(Cnt, MVT::i32));
+ }
+
+ return SDValue();
+}
+
+/// Target-specific DAG combine function for NEON load/store intrinsics
+/// to merge base address updates.
+static SDValue CombineBaseUpdate(SDNode *N,
+ TargetLowering::DAGCombinerInfo &DCI) {
+ if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
+ return SDValue();
+
+ SelectionDAG &DAG = DCI.DAG;
+ bool isIntrinsic = (N->getOpcode() == ISD::INTRINSIC_VOID ||
+ N->getOpcode() == ISD::INTRINSIC_W_CHAIN);
+ unsigned AddrOpIdx = (isIntrinsic ? 2 : 1);
+ SDValue Addr = N->getOperand(AddrOpIdx);
+
+ // Search for a use of the address operand that is an increment.
+ for (SDNode::use_iterator UI = Addr.getNode()->use_begin(),
+ UE = Addr.getNode()->use_end(); UI != UE; ++UI) {
+ SDNode *User = *UI;
+ if (User->getOpcode() != ISD::ADD ||
+ UI.getUse().getResNo() != Addr.getResNo())
+ continue;
+
+ // Check that the add is independent of the load/store. Otherwise, folding
+ // it would create a cycle.
+ if (User->isPredecessorOf(N) || N->isPredecessorOf(User))
+ continue;
+
+ // Find the new opcode for the updating load/store.
+ bool isLoad = true;
+ bool isLaneOp = false;
+ unsigned NewOpc = 0;
+ unsigned NumVecs = 0;
+ if (isIntrinsic) {
+ unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
+ switch (IntNo) {
+ default: llvm_unreachable("unexpected intrinsic for Neon base update");
+ case Intrinsic::arm_neon_vld1: NewOpc = AArch64ISD::NEON_LD1_UPD;
+ NumVecs = 1; break;
+ case Intrinsic::arm_neon_vld2: NewOpc = AArch64ISD::NEON_LD2_UPD;
+ NumVecs = 2; break;
+ case Intrinsic::arm_neon_vld3: NewOpc = AArch64ISD::NEON_LD3_UPD;
+ NumVecs = 3; break;
+ case Intrinsic::arm_neon_vld4: NewOpc = AArch64ISD::NEON_LD4_UPD;
+ NumVecs = 4; break;
+ case Intrinsic::arm_neon_vst1: NewOpc = AArch64ISD::NEON_ST1_UPD;
+ NumVecs = 1; isLoad = false; break;
+ case Intrinsic::arm_neon_vst2: NewOpc = AArch64ISD::NEON_ST2_UPD;
+ NumVecs = 2; isLoad = false; break;
+ case Intrinsic::arm_neon_vst3: NewOpc = AArch64ISD::NEON_ST3_UPD;
+ NumVecs = 3; isLoad = false; break;
+ case Intrinsic::arm_neon_vst4: NewOpc = AArch64ISD::NEON_ST4_UPD;
+ NumVecs = 4; isLoad = false; break;
+ case Intrinsic::aarch64_neon_vld1x2: NewOpc = AArch64ISD::NEON_LD1x2_UPD;
+ NumVecs = 2; break;
+ case Intrinsic::aarch64_neon_vld1x3: NewOpc = AArch64ISD::NEON_LD1x3_UPD;
+ NumVecs = 3; break;
+ case Intrinsic::aarch64_neon_vld1x4: NewOpc = AArch64ISD::NEON_LD1x4_UPD;
+ NumVecs = 4; break;
+ case Intrinsic::aarch64_neon_vst1x2: NewOpc = AArch64ISD::NEON_ST1x2_UPD;
+ NumVecs = 2; isLoad = false; break;
+ case Intrinsic::aarch64_neon_vst1x3: NewOpc = AArch64ISD::NEON_ST1x3_UPD;
+ NumVecs = 3; isLoad = false; break;
+ case Intrinsic::aarch64_neon_vst1x4: NewOpc = AArch64ISD::NEON_ST1x4_UPD;
+ NumVecs = 4; isLoad = false; break;
+ case Intrinsic::arm_neon_vld2lane: NewOpc = AArch64ISD::NEON_LD2LN_UPD;
+ NumVecs = 2; isLaneOp = true; break;
+ case Intrinsic::arm_neon_vld3lane: NewOpc = AArch64ISD::NEON_LD3LN_UPD;
+ NumVecs = 3; isLaneOp = true; break;
+ case Intrinsic::arm_neon_vld4lane: NewOpc = AArch64ISD::NEON_LD4LN_UPD;
+ NumVecs = 4; isLaneOp = true; break;
+ case Intrinsic::arm_neon_vst2lane: NewOpc = AArch64ISD::NEON_ST2LN_UPD;
+ NumVecs = 2; isLoad = false; isLaneOp = true; break;
+ case Intrinsic::arm_neon_vst3lane: NewOpc = AArch64ISD::NEON_ST3LN_UPD;
+ NumVecs = 3; isLoad = false; isLaneOp = true; break;
+ case Intrinsic::arm_neon_vst4lane: NewOpc = AArch64ISD::NEON_ST4LN_UPD;
+ NumVecs = 4; isLoad = false; isLaneOp = true; break;
+ }
+ } else {
+ isLaneOp = true;
+ switch (N->getOpcode()) {
+ default: llvm_unreachable("unexpected opcode for Neon base update");
+ case AArch64ISD::NEON_LD2DUP: NewOpc = AArch64ISD::NEON_LD2DUP_UPD;
+ NumVecs = 2; break;
+ case AArch64ISD::NEON_LD3DUP: NewOpc = AArch64ISD::NEON_LD3DUP_UPD;
+ NumVecs = 3; break;
+ case AArch64ISD::NEON_LD4DUP: NewOpc = AArch64ISD::NEON_LD4DUP_UPD;
+ NumVecs = 4; break;
+ }
+ }
+
+ // Find the size of memory referenced by the load/store.
+ EVT VecTy;
+ if (isLoad)
+ VecTy = N->getValueType(0);
+ else
+ VecTy = N->getOperand(AddrOpIdx + 1).getValueType();
+ unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8;
+ if (isLaneOp)
+ NumBytes /= VecTy.getVectorNumElements();
+
+ // If the increment is a constant, it must match the memory ref size.
+ SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
+ if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
+ uint32_t IncVal = CInc->getZExtValue();
+ if (IncVal != NumBytes)
+ continue;
+ Inc = DAG.getTargetConstant(IncVal, MVT::i32);
+ }
+
+ // Create the new updating load/store node.
+ EVT Tys[6];
+ unsigned NumResultVecs = (isLoad ? NumVecs : 0);
+ unsigned n;
+ for (n = 0; n < NumResultVecs; ++n)
+ Tys[n] = VecTy;
+ Tys[n++] = MVT::i64;
+ Tys[n] = MVT::Other;
+ SDVTList SDTys = DAG.getVTList(Tys, NumResultVecs + 2);
+ SmallVector<SDValue, 8> Ops;
+ Ops.push_back(N->getOperand(0)); // incoming chain
+ Ops.push_back(N->getOperand(AddrOpIdx));
+ Ops.push_back(Inc);
+ for (unsigned i = AddrOpIdx + 1; i < N->getNumOperands(); ++i) {
+ Ops.push_back(N->getOperand(i));
+ }
+ MemIntrinsicSDNode *MemInt = cast<MemIntrinsicSDNode>(N);
+ SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, SDLoc(N), SDTys,
+ Ops.data(), Ops.size(),
+ MemInt->getMemoryVT(),
+ MemInt->getMemOperand());
+
+ // Update the uses.
+ std::vector<SDValue> NewResults;
+ for (unsigned i = 0; i < NumResultVecs; ++i) {
+ NewResults.push_back(SDValue(UpdN.getNode(), i));
+ }
+ NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs + 1)); // chain
+ DCI.CombineTo(N, NewResults);
+ DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs));
+
+ break;
+ }
+ return SDValue();
+}
+
+/// For a VDUPLANE node N, check if its source operand is a vldN-lane (N > 1)
+/// intrinsic, and if all the other uses of that intrinsic are also VDUPLANEs.
+/// If so, combine them to a vldN-dup operation and return true.
+static SDValue CombineVLDDUP(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
+ SelectionDAG &DAG = DCI.DAG;
+ EVT VT = N->getValueType(0);
+
+ // Check if the VDUPLANE operand is a vldN-dup intrinsic.
+ SDNode *VLD = N->getOperand(0).getNode();
+ if (VLD->getOpcode() != ISD::INTRINSIC_W_CHAIN)
+ return SDValue();
+ unsigned NumVecs = 0;
+ unsigned NewOpc = 0;
+ unsigned IntNo = cast<ConstantSDNode>(VLD->getOperand(1))->getZExtValue();
+ if (IntNo == Intrinsic::arm_neon_vld2lane) {
+ NumVecs = 2;
+ NewOpc = AArch64ISD::NEON_LD2DUP;
+ } else if (IntNo == Intrinsic::arm_neon_vld3lane) {
+ NumVecs = 3;
+ NewOpc = AArch64ISD::NEON_LD3DUP;
+ } else if (IntNo == Intrinsic::arm_neon_vld4lane) {
+ NumVecs = 4;
+ NewOpc = AArch64ISD::NEON_LD4DUP;
+ } else {
+ return SDValue();
+ }
+
+ // First check that all the vldN-lane uses are VDUPLANEs and that the lane
+ // numbers match the load.
+ unsigned VLDLaneNo =
+ cast<ConstantSDNode>(VLD->getOperand(NumVecs + 3))->getZExtValue();
+ for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
+ UI != UE; ++UI) {
+ // Ignore uses of the chain result.
+ if (UI.getUse().getResNo() == NumVecs)
+ continue;
+ SDNode *User = *UI;
+ if (User->getOpcode() != AArch64ISD::NEON_VDUPLANE ||
+ VLDLaneNo != cast<ConstantSDNode>(User->getOperand(1))->getZExtValue())
+ return SDValue();
+ }
+
+ // Create the vldN-dup node.
+ EVT Tys[5];
+ unsigned n;
+ for (n = 0; n < NumVecs; ++n)
+ Tys[n] = VT;
+ Tys[n] = MVT::Other;
+ SDVTList SDTys = DAG.getVTList(Tys, NumVecs + 1);
+ SDValue Ops[] = { VLD->getOperand(0), VLD->getOperand(2) };
+ MemIntrinsicSDNode *VLDMemInt = cast<MemIntrinsicSDNode>(VLD);
+ SDValue VLDDup = DAG.getMemIntrinsicNode(NewOpc, SDLoc(VLD), SDTys, Ops, 2,
+ VLDMemInt->getMemoryVT(),
+ VLDMemInt->getMemOperand());
+
+ // Update the uses.
+ for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
+ UI != UE; ++UI) {
+ unsigned ResNo = UI.getUse().getResNo();
+ // Ignore uses of the chain result.
+ if (ResNo == NumVecs)
+ continue;
+ SDNode *User = *UI;
+ DCI.CombineTo(User, SDValue(VLDDup.getNode(), ResNo));
+ }
+
+ // Now the vldN-lane intrinsic is dead except for its chain result.
+ // Update uses of the chain.
+ std::vector<SDValue> VLDDupResults;
+ for (unsigned n = 0; n < NumVecs; ++n)
+ VLDDupResults.push_back(SDValue(VLDDup.getNode(), n));
+ VLDDupResults.push_back(SDValue(VLDDup.getNode(), NumVecs));
+ DCI.CombineTo(VLD, VLDDupResults);
+
+ return SDValue(N, 0);
+}
SDValue
AArch64TargetLowering::PerformDAGCombine(SDNode *N,
default: break;
case ISD::AND: return PerformANDCombine(N, DCI);
case ISD::OR: return PerformORCombine(N, DCI, getSubtarget());
- case ISD::SRA: return PerformSRACombine(N, DCI);
+ case ISD::SHL:
+ case ISD::SRA:
+ case ISD::SRL:
+ return PerformShiftCombine(N, DCI, getSubtarget());
+ case ISD::INTRINSIC_WO_CHAIN:
+ return PerformIntrinsicCombine(N, DCI.DAG);
+ case AArch64ISD::NEON_VDUPLANE:
+ return CombineVLDDUP(N, DCI);
+ case AArch64ISD::NEON_LD2DUP:
+ case AArch64ISD::NEON_LD3DUP:
+ case AArch64ISD::NEON_LD4DUP:
+ return CombineBaseUpdate(N, DCI);
+ case ISD::INTRINSIC_VOID:
+ case ISD::INTRINSIC_W_CHAIN:
+ switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
+ case Intrinsic::arm_neon_vld1:
+ case Intrinsic::arm_neon_vld2:
+ case Intrinsic::arm_neon_vld3:
+ case Intrinsic::arm_neon_vld4:
+ case Intrinsic::arm_neon_vst1:
+ case Intrinsic::arm_neon_vst2:
+ case Intrinsic::arm_neon_vst3:
+ case Intrinsic::arm_neon_vst4:
+ case Intrinsic::arm_neon_vld2lane:
+ case Intrinsic::arm_neon_vld3lane:
+ case Intrinsic::arm_neon_vld4lane:
+ case Intrinsic::aarch64_neon_vld1x2:
+ case Intrinsic::aarch64_neon_vld1x3:
+ case Intrinsic::aarch64_neon_vld1x4:
+ case Intrinsic::aarch64_neon_vst1x2:
+ case Intrinsic::aarch64_neon_vst1x3:
+ case Intrinsic::aarch64_neon_vst1x4:
+ case Intrinsic::arm_neon_vst2lane:
+ case Intrinsic::arm_neon_vst3lane:
+ case Intrinsic::arm_neon_vst4lane:
+ return CombineBaseUpdate(N, DCI);
+ default:
+ break;
+ }
+ }
+ return SDValue();
+}
+
+bool
+AArch64TargetLowering::isFMAFasterThanFMulAndFAdd(EVT VT) const {
+ VT = VT.getScalarType();
+
+ if (!VT.isSimple())
+ return false;
+
+ switch (VT.getSimpleVT().SimpleTy) {
+ case MVT::f16:
+ case MVT::f32:
+ case MVT::f64:
+ return true;
+ case MVT::f128:
+ return false;
+ default:
+ break;
+ }
+
+ return false;
+}
+
+// Check whether a Build Vector could be presented as Shuffle Vector. If yes,
+// try to call LowerVECTOR_SHUFFLE to lower it.
+bool AArch64TargetLowering::isKnownShuffleVector(SDValue Op, SelectionDAG &DAG,
+ SDValue &Res) const {
+ SDLoc DL(Op);
+ EVT VT = Op.getValueType();
+ unsigned NumElts = VT.getVectorNumElements();
+ unsigned V0NumElts = 0;
+ int Mask[16];
+ SDValue V0, V1;
+
+ // Check if all elements are extracted from less than 3 vectors.
+ for (unsigned i = 0; i < NumElts; ++i) {
+ SDValue Elt = Op.getOperand(i);
+ if (Elt.getOpcode() != ISD::EXTRACT_VECTOR_ELT)
+ return false;
+
+ if (V0.getNode() == 0) {
+ V0 = Elt.getOperand(0);
+ V0NumElts = V0.getValueType().getVectorNumElements();
+ }
+ if (Elt.getOperand(0) == V0) {
+ Mask[i] = (cast<ConstantSDNode>(Elt->getOperand(1))->getZExtValue());
+ continue;
+ } else if (V1.getNode() == 0) {
+ V1 = Elt.getOperand(0);
+ }
+ if (Elt.getOperand(0) == V1) {
+ unsigned Lane = cast<ConstantSDNode>(Elt->getOperand(1))->getZExtValue();
+ Mask[i] = (Lane + V0NumElts);
+ continue;
+ } else {
+ return false;
+ }
+ }
+
+ if (!V1.getNode() && V0NumElts == NumElts * 2) {
+ V1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, V0,
+ DAG.getConstant(NumElts, MVT::i64));
+ V0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, V0,
+ DAG.getConstant(0, MVT::i64));
+ V0NumElts = V0.getValueType().getVectorNumElements();
+ }
+
+ if (V1.getNode() && NumElts == V0NumElts &&
+ V0NumElts == V1.getValueType().getVectorNumElements()) {
+ SDValue Shuffle = DAG.getVectorShuffle(VT, DL, V0, V1, Mask);
+ Res = LowerVECTOR_SHUFFLE(Shuffle, DAG);
+ return true;
+ } else
+ return false;
+}
+
+// If this is a case we can't handle, return null and let the default
+// expansion code take care of it.
+SDValue
+AArch64TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
+ const AArch64Subtarget *ST) const {
+
+ BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
+ SDLoc DL(Op);
+ EVT VT = Op.getValueType();
+
+ APInt SplatBits, SplatUndef;
+ unsigned SplatBitSize;
+ bool HasAnyUndefs;
+
+ unsigned UseNeonMov = VT.getSizeInBits() >= 64;
+
+ // Note we favor lowering MOVI over MVNI.
+ // This has implications on the definition of patterns in TableGen to select
+ // BIC immediate instructions but not ORR immediate instructions.
+ // If this lowering order is changed, TableGen patterns for BIC immediate and
+ // ORR immediate instructions have to be updated.
+ if (UseNeonMov &&
+ BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
+ if (SplatBitSize <= 64) {
+ // First attempt to use vector immediate-form MOVI
+ EVT NeonMovVT;
+ unsigned Imm = 0;
+ unsigned OpCmode = 0;
+
+ if (isNeonModifiedImm(SplatBits.getZExtValue(), SplatUndef.getZExtValue(),
+ SplatBitSize, DAG, VT.is128BitVector(),
+ Neon_Mov_Imm, NeonMovVT, Imm, OpCmode)) {
+ SDValue ImmVal = DAG.getTargetConstant(Imm, MVT::i32);
+ SDValue OpCmodeVal = DAG.getConstant(OpCmode, MVT::i32);
+
+ if (ImmVal.getNode() && OpCmodeVal.getNode()) {
+ SDValue NeonMov = DAG.getNode(AArch64ISD::NEON_MOVIMM, DL, NeonMovVT,
+ ImmVal, OpCmodeVal);
+ return DAG.getNode(ISD::BITCAST, DL, VT, NeonMov);
+ }
+ }
+
+ // Then attempt to use vector immediate-form MVNI
+ uint64_t NegatedImm = (~SplatBits).getZExtValue();
+ if (isNeonModifiedImm(NegatedImm, SplatUndef.getZExtValue(), SplatBitSize,
+ DAG, VT.is128BitVector(), Neon_Mvn_Imm, NeonMovVT,
+ Imm, OpCmode)) {
+ SDValue ImmVal = DAG.getTargetConstant(Imm, MVT::i32);
+ SDValue OpCmodeVal = DAG.getConstant(OpCmode, MVT::i32);
+ if (ImmVal.getNode() && OpCmodeVal.getNode()) {
+ SDValue NeonMov = DAG.getNode(AArch64ISD::NEON_MVNIMM, DL, NeonMovVT,
+ ImmVal, OpCmodeVal);
+ return DAG.getNode(ISD::BITCAST, DL, VT, NeonMov);
+ }
+ }
+
+ // Attempt to use vector immediate-form FMOV
+ if (((VT == MVT::v2f32 || VT == MVT::v4f32) && SplatBitSize == 32) ||
+ (VT == MVT::v2f64 && SplatBitSize == 64)) {
+ APFloat RealVal(
+ SplatBitSize == 32 ? APFloat::IEEEsingle : APFloat::IEEEdouble,
+ SplatBits);
+ uint32_t ImmVal;
+ if (A64Imms::isFPImm(RealVal, ImmVal)) {
+ SDValue Val = DAG.getTargetConstant(ImmVal, MVT::i32);
+ return DAG.getNode(AArch64ISD::NEON_FMOVIMM, DL, VT, Val);
+ }
+ }
+ }
+ }
+
+ unsigned NumElts = VT.getVectorNumElements();
+ bool isOnlyLowElement = true;
+ bool usesOnlyOneValue = true;
+ bool hasDominantValue = false;
+ bool isConstant = true;
+
+ // Map of the number of times a particular SDValue appears in the
+ // element list.
+ DenseMap<SDValue, unsigned> ValueCounts;
+ SDValue Value;
+ for (unsigned i = 0; i < NumElts; ++i) {
+ SDValue V = Op.getOperand(i);
+ if (V.getOpcode() == ISD::UNDEF)
+ continue;
+ if (i > 0)
+ isOnlyLowElement = false;
+ if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
+ isConstant = false;
+
+ ValueCounts.insert(std::make_pair(V, 0));
+ unsigned &Count = ValueCounts[V];
+
+ // Is this value dominant? (takes up more than half of the lanes)
+ if (++Count > (NumElts / 2)) {
+ hasDominantValue = true;
+ Value = V;
+ }
+ }
+ if (ValueCounts.size() != 1)
+ usesOnlyOneValue = false;
+ if (!Value.getNode() && ValueCounts.size() > 0)
+ Value = ValueCounts.begin()->first;
+
+ if (ValueCounts.size() == 0)
+ return DAG.getUNDEF(VT);
+
+ // Loads are better lowered with insert_vector_elt.
+ // Keep going if we are hitting this case.
+ if (isOnlyLowElement && !ISD::isNormalLoad(Value.getNode()))
+ return DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VT, Value);
+
+ unsigned EltSize = VT.getVectorElementType().getSizeInBits();
+ if (hasDominantValue && EltSize <= 64) {
+ // Use VDUP for non-constant splats.
+ if (!isConstant) {
+ SDValue N;
+
+ // If we are DUPing a value that comes directly from a vector, we could
+ // just use DUPLANE. We can only do this if the lane being extracted
+ // is at a constant index, as the DUP from lane instructions only have
+ // constant-index forms.
+ if (Value->getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
+ isa<ConstantSDNode>(Value->getOperand(1))) {
+ N = DAG.getNode(AArch64ISD::NEON_VDUPLANE, DL, VT,
+ Value->getOperand(0), Value->getOperand(1));
+ } else
+ N = DAG.getNode(AArch64ISD::NEON_VDUP, DL, VT, Value);
+
+ if (!usesOnlyOneValue) {
+ // The dominant value was splatted as 'N', but we now have to insert
+ // all differing elements.
+ for (unsigned I = 0; I < NumElts; ++I) {
+ if (Op.getOperand(I) == Value)
+ continue;
+ SmallVector<SDValue, 3> Ops;
+ Ops.push_back(N);
+ Ops.push_back(Op.getOperand(I));
+ Ops.push_back(DAG.getConstant(I, MVT::i64));
+ N = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, VT, &Ops[0], 3);
+ }
+ }
+ return N;
+ }
+ if (usesOnlyOneValue && isConstant) {
+ return DAG.getNode(AArch64ISD::NEON_VDUP, DL, VT, Value);
+ }
+ }
+ // If all elements are constants and the case above didn't get hit, fall back
+ // to the default expansion, which will generate a load from the constant
+ // pool.
+ if (isConstant)
+ return SDValue();
+
+ // Try to lower this in lowering ShuffleVector way.
+ SDValue Shuf;
+ if (isKnownShuffleVector(Op, DAG, Shuf))
+ return Shuf;
+
+ // If all else fails, just use a sequence of INSERT_VECTOR_ELT when we
+ // know the default expansion would otherwise fall back on something even
+ // worse. For a vector with one or two non-undef values, that's
+ // scalar_to_vector for the elements followed by a shuffle (provided the
+ // shuffle is valid for the target) and materialization element by element
+ // on the stack followed by a load for everything else.
+ if (!isConstant && !usesOnlyOneValue) {
+ SDValue Vec = DAG.getUNDEF(VT);
+ for (unsigned i = 0 ; i < NumElts; ++i) {
+ SDValue V = Op.getOperand(i);
+ if (V.getOpcode() == ISD::UNDEF)
+ continue;
+ SDValue LaneIdx = DAG.getConstant(i, MVT::i64);
+ Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, VT, Vec, V, LaneIdx);
+ }
+ return Vec;
}
return SDValue();
}
+/// isREVMask - Check if a vector shuffle corresponds to a REV
+/// instruction with the specified blocksize. (The order of the elements
+/// within each block of the vector is reversed.)
+static bool isREVMask(ArrayRef<int> M, EVT VT, unsigned BlockSize) {
+ assert((BlockSize == 16 || BlockSize == 32 || BlockSize == 64) &&
+ "Only possible block sizes for REV are: 16, 32, 64");
+
+ unsigned EltSz = VT.getVectorElementType().getSizeInBits();
+ if (EltSz == 64)
+ return false;
+
+ unsigned NumElts = VT.getVectorNumElements();
+ unsigned BlockElts = M[0] + 1;
+ // If the first shuffle index is UNDEF, be optimistic.
+ if (M[0] < 0)
+ BlockElts = BlockSize / EltSz;
+
+ if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
+ return false;
+
+ for (unsigned i = 0; i < NumElts; ++i) {
+ if (M[i] < 0)
+ continue; // ignore UNDEF indices
+ if ((unsigned)M[i] != (i - i % BlockElts) + (BlockElts - 1 - i % BlockElts))
+ return false;
+ }
+
+ return true;
+}
+
+// isPermuteMask - Check whether the vector shuffle matches to UZP, ZIP and
+// TRN instruction.
+static unsigned isPermuteMask(ArrayRef<int> M, EVT VT) {
+ unsigned NumElts = VT.getVectorNumElements();
+ if (NumElts < 4)
+ return 0;
+
+ bool ismatch = true;
+
+ // Check UZP1
+ for (unsigned i = 0; i < NumElts; ++i) {
+ if ((unsigned)M[i] != i * 2) {
+ ismatch = false;
+ break;
+ }
+ }
+ if (ismatch)
+ return AArch64ISD::NEON_UZP1;
+
+ // Check UZP2
+ ismatch = true;
+ for (unsigned i = 0; i < NumElts; ++i) {
+ if ((unsigned)M[i] != i * 2 + 1) {
+ ismatch = false;
+ break;
+ }
+ }
+ if (ismatch)
+ return AArch64ISD::NEON_UZP2;
+
+ // Check ZIP1
+ ismatch = true;
+ for (unsigned i = 0; i < NumElts; ++i) {
+ if ((unsigned)M[i] != i / 2 + NumElts * (i % 2)) {
+ ismatch = false;
+ break;
+ }
+ }
+ if (ismatch)
+ return AArch64ISD::NEON_ZIP1;
+
+ // Check ZIP2
+ ismatch = true;
+ for (unsigned i = 0; i < NumElts; ++i) {
+ if ((unsigned)M[i] != (NumElts + i) / 2 + NumElts * (i % 2)) {
+ ismatch = false;
+ break;
+ }
+ }
+ if (ismatch)
+ return AArch64ISD::NEON_ZIP2;
+
+ // Check TRN1
+ ismatch = true;
+ for (unsigned i = 0; i < NumElts; ++i) {
+ if ((unsigned)M[i] != i + (NumElts - 1) * (i % 2)) {
+ ismatch = false;
+ break;
+ }
+ }
+ if (ismatch)
+ return AArch64ISD::NEON_TRN1;
+
+ // Check TRN2
+ ismatch = true;
+ for (unsigned i = 0; i < NumElts; ++i) {
+ if ((unsigned)M[i] != 1 + i + (NumElts - 1) * (i % 2)) {
+ ismatch = false;
+ break;
+ }
+ }
+ if (ismatch)
+ return AArch64ISD::NEON_TRN2;
+
+ return 0;
+}
+
+SDValue
+AArch64TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op,
+ SelectionDAG &DAG) const {
+ SDValue V1 = Op.getOperand(0);
+ SDValue V2 = Op.getOperand(1);
+ SDLoc dl(Op);
+ EVT VT = Op.getValueType();
+ ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
+
+ // Convert shuffles that are directly supported on NEON to target-specific
+ // DAG nodes, instead of keeping them as shuffles and matching them again
+ // during code selection. This is more efficient and avoids the possibility
+ // of inconsistencies between legalization and selection.
+ ArrayRef<int> ShuffleMask = SVN->getMask();
+
+ unsigned EltSize = VT.getVectorElementType().getSizeInBits();
+ if (EltSize > 64)
+ return SDValue();
+
+ if (isREVMask(ShuffleMask, VT, 64))
+ return DAG.getNode(AArch64ISD::NEON_REV64, dl, VT, V1);
+ if (isREVMask(ShuffleMask, VT, 32))
+ return DAG.getNode(AArch64ISD::NEON_REV32, dl, VT, V1);
+ if (isREVMask(ShuffleMask, VT, 16))
+ return DAG.getNode(AArch64ISD::NEON_REV16, dl, VT, V1);
+
+ unsigned ISDNo = isPermuteMask(ShuffleMask, VT);
+ if (ISDNo)
+ return DAG.getNode(ISDNo, dl, VT, V1, V2);
+
+ // If the element of shuffle mask are all the same constant, we can
+ // transform it into either NEON_VDUP or NEON_VDUPLANE
+ if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
+ int Lane = SVN->getSplatIndex();
+ // If this is undef splat, generate it via "just" vdup, if possible.
+ if (Lane == -1) Lane = 0;
+
+ // Test if V1 is a SCALAR_TO_VECTOR.
+ if (V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
+ return DAG.getNode(AArch64ISD::NEON_VDUP, dl, VT, V1.getOperand(0));
+ }
+ // Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR.
+ if (V1.getOpcode() == ISD::BUILD_VECTOR) {
+ bool IsScalarToVector = true;
+ for (unsigned i = 0, e = V1.getNumOperands(); i != e; ++i)
+ if (V1.getOperand(i).getOpcode() != ISD::UNDEF &&
+ i != (unsigned)Lane) {
+ IsScalarToVector = false;
+ break;
+ }
+ if (IsScalarToVector)
+ return DAG.getNode(AArch64ISD::NEON_VDUP, dl, VT,
+ V1.getOperand(Lane));
+ }
+
+ // Test if V1 is a EXTRACT_SUBVECTOR.
+ if (V1.getOpcode() == ISD::EXTRACT_SUBVECTOR) {
+ int ExtLane = cast<ConstantSDNode>(V1.getOperand(1))->getZExtValue();
+ return DAG.getNode(AArch64ISD::NEON_VDUPLANE, dl, VT, V1.getOperand(0),
+ DAG.getConstant(Lane + ExtLane, MVT::i64));
+ }
+ // Test if V1 is a CONCAT_VECTORS.
+ if (V1.getOpcode() == ISD::CONCAT_VECTORS &&
+ V1.getOperand(1).getOpcode() == ISD::UNDEF) {
+ SDValue Op0 = V1.getOperand(0);
+ assert((unsigned)Lane < Op0.getValueType().getVectorNumElements() &&
+ "Invalid vector lane access");
+ return DAG.getNode(AArch64ISD::NEON_VDUPLANE, dl, VT, Op0,
+ DAG.getConstant(Lane, MVT::i64));
+ }
+
+ return DAG.getNode(AArch64ISD::NEON_VDUPLANE, dl, VT, V1,
+ DAG.getConstant(Lane, MVT::i64));
+ }
+
+ int Length = ShuffleMask.size();
+ int V1EltNum = V1.getValueType().getVectorNumElements();
+
+ // If the number of v1 elements is the same as the number of shuffle mask
+ // element and the shuffle masks are sequential values, we can transform
+ // it into NEON_VEXTRACT.
+ if (V1EltNum == Length) {
+ // Check if the shuffle mask is sequential.
+ bool IsSequential = true;
+ int CurMask = ShuffleMask[0];
+ for (int I = 0; I < Length; ++I) {
+ if (ShuffleMask[I] != CurMask) {
+ IsSequential = false;
+ break;
+ }
+ CurMask++;
+ }
+ if (IsSequential) {
+ assert((EltSize % 8 == 0) && "Bitsize of vector element is incorrect");
+ unsigned VecSize = EltSize * V1EltNum;
+ unsigned Index = (EltSize/8) * ShuffleMask[0];
+ if (VecSize == 64 || VecSize == 128)
+ return DAG.getNode(AArch64ISD::NEON_VEXTRACT, dl, VT, V1, V2,
+ DAG.getConstant(Index, MVT::i64));
+ }
+ }
+
+ // For shuffle mask like "0, 1, 2, 3, 4, 5, 13, 7", try to generate insert
+ // by element from V2 to V1 .
+ // If shuffle mask is like "0, 1, 10, 11, 12, 13, 14, 15", V2 would be a
+ // better choice to be inserted than V1 as less insert needed, so we count
+ // element to be inserted for both V1 and V2, and select less one as insert
+ // target.
+
+ // Collect elements need to be inserted and their index.
+ SmallVector<int, 8> NV1Elt;
+ SmallVector<int, 8> N1Index;
+ SmallVector<int, 8> NV2Elt;
+ SmallVector<int, 8> N2Index;
+ for (int I = 0; I != Length; ++I) {
+ if (ShuffleMask[I] != I) {
+ NV1Elt.push_back(ShuffleMask[I]);
+ N1Index.push_back(I);
+ }
+ }
+ for (int I = 0; I != Length; ++I) {
+ if (ShuffleMask[I] != (I + V1EltNum)) {
+ NV2Elt.push_back(ShuffleMask[I]);
+ N2Index.push_back(I);
+ }
+ }
+
+ // Decide which to be inserted. If all lanes mismatch, neither V1 nor V2
+ // will be inserted.
+ SDValue InsV = V1;
+ SmallVector<int, 8> InsMasks = NV1Elt;
+ SmallVector<int, 8> InsIndex = N1Index;
+ if ((int)NV1Elt.size() != Length || (int)NV2Elt.size() != Length) {
+ if (NV1Elt.size() > NV2Elt.size()) {
+ InsV = V2;
+ InsMasks = NV2Elt;
+ InsIndex = N2Index;
+ }
+ } else {
+ InsV = DAG.getNode(ISD::UNDEF, dl, VT);
+ }
+
+ for (int I = 0, E = InsMasks.size(); I != E; ++I) {
+ SDValue ExtV = V1;
+ int Mask = InsMasks[I];
+ if (Mask >= V1EltNum) {
+ ExtV = V2;
+ Mask -= V1EltNum;
+ }
+ // Any value type smaller than i32 is illegal in AArch64, and this lower
+ // function is called after legalize pass, so we need to legalize
+ // the result here.
+ EVT EltVT;
+ if (VT.getVectorElementType().isFloatingPoint())
+ EltVT = (EltSize == 64) ? MVT::f64 : MVT::f32;
+ else
+ EltVT = (EltSize == 64) ? MVT::i64 : MVT::i32;
+
+ if (Mask >= 0) {
+ ExtV = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, ExtV,
+ DAG.getConstant(Mask, MVT::i64));
+ InsV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, InsV, ExtV,
+ DAG.getConstant(InsIndex[I], MVT::i64));
+ }
+ }
+ return InsV;
+}
+
AArch64TargetLowering::ConstraintType
AArch64TargetLowering::getConstraintType(const std::string &Constraint) const {
if (Constraint.size() == 1) {
std::pair<unsigned, const TargetRegisterClass*>
AArch64TargetLowering::getRegForInlineAsmConstraint(
const std::string &Constraint,
- EVT VT) const {
+ MVT VT) const {
if (Constraint.size() == 1) {
switch (Constraint[0]) {
case 'r':
return std::make_pair(0U, &AArch64::FPR16RegClass);
else if (VT == MVT::f32)
return std::make_pair(0U, &AArch64::FPR32RegClass);
- else if (VT == MVT::f64)
- return std::make_pair(0U, &AArch64::FPR64RegClass);
else if (VT.getSizeInBits() == 64)
- return std::make_pair(0U, &AArch64::VPR64RegClass);
- else if (VT == MVT::f128)
- return std::make_pair(0U, &AArch64::FPR128RegClass);
+ return std::make_pair(0U, &AArch64::FPR64RegClass);
else if (VT.getSizeInBits() == 128)
- return std::make_pair(0U, &AArch64::VPR128RegClass);
+ return std::make_pair(0U, &AArch64::FPR128RegClass);
break;
}
}
// constraint into a member of a register class.
return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
}
+
+/// Represent NEON load and store intrinsics as MemIntrinsicNodes.
+/// The associated MachineMemOperands record the alignment specified
+/// in the intrinsic calls.
+bool AArch64TargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
+ const CallInst &I,
+ unsigned Intrinsic) const {
+ switch (Intrinsic) {
+ case Intrinsic::arm_neon_vld1:
+ case Intrinsic::arm_neon_vld2:
+ case Intrinsic::arm_neon_vld3:
+ case Intrinsic::arm_neon_vld4:
+ case Intrinsic::aarch64_neon_vld1x2:
+ case Intrinsic::aarch64_neon_vld1x3:
+ case Intrinsic::aarch64_neon_vld1x4:
+ case Intrinsic::arm_neon_vld2lane:
+ case Intrinsic::arm_neon_vld3lane:
+ case Intrinsic::arm_neon_vld4lane: {
+ Info.opc = ISD::INTRINSIC_W_CHAIN;
+ // Conservatively set memVT to the entire set of vectors loaded.
+ uint64_t NumElts = getDataLayout()->getTypeAllocSize(I.getType()) / 8;
+ Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
+ Info.ptrVal = I.getArgOperand(0);
+ Info.offset = 0;
+ Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
+ Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
+ Info.vol = false; // volatile loads with NEON intrinsics not supported
+ Info.readMem = true;
+ Info.writeMem = false;
+ return true;
+ }
+ case Intrinsic::arm_neon_vst1:
+ case Intrinsic::arm_neon_vst2:
+ case Intrinsic::arm_neon_vst3:
+ case Intrinsic::arm_neon_vst4:
+ case Intrinsic::aarch64_neon_vst1x2:
+ case Intrinsic::aarch64_neon_vst1x3:
+ case Intrinsic::aarch64_neon_vst1x4:
+ case Intrinsic::arm_neon_vst2lane:
+ case Intrinsic::arm_neon_vst3lane:
+ case Intrinsic::arm_neon_vst4lane: {
+ Info.opc = ISD::INTRINSIC_VOID;
+ // Conservatively set memVT to the entire set of vectors stored.
+ unsigned NumElts = 0;
+ for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
+ Type *ArgTy = I.getArgOperand(ArgI)->getType();
+ if (!ArgTy->isVectorTy())
+ break;
+ NumElts += getDataLayout()->getTypeAllocSize(ArgTy) / 8;
+ }
+ Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
+ Info.ptrVal = I.getArgOperand(0);
+ Info.offset = 0;
+ Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
+ Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
+ Info.vol = false; // volatile stores with NEON intrinsics not supported
+ Info.readMem = false;
+ Info.writeMem = true;
+ return true;
+ }
+ default:
+ break;
+ }
+
+ return false;
+}
projects / oota-llvm.git / blobdiff