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llvm-6502/lib/Target/ARM64/ARM64ISelDAGToDAG.cpp
Chandler Carruth 42e8630239 [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 
definition below all of the header #include lines, lib/Target/...
edition.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206842 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-22 02:41:26 +00:00

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//===-- ARM64ISelDAGToDAG.cpp - A dag to dag inst selector for ARM64 ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines an instruction selector for the ARM64 target.
//
//===----------------------------------------------------------------------===//
#include "ARM64TargetMachine.h"
#include "MCTargetDesc/ARM64AddressingModes.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/IR/Function.h" // To access function attributes.
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
#define DEBUG_TYPE "arm64-isel"
//===--------------------------------------------------------------------===//
/// ARM64DAGToDAGISel - ARM64 specific code to select ARM64 machine
/// instructions for SelectionDAG operations.
///
namespace {
class ARM64DAGToDAGISel : public SelectionDAGISel {
ARM64TargetMachine &TM;
/// Subtarget - Keep a pointer to the ARM64Subtarget around so that we can
/// make the right decision when generating code for different targets.
const ARM64Subtarget *Subtarget;
bool ForCodeSize;
public:
explicit ARM64DAGToDAGISel(ARM64TargetMachine &tm, CodeGenOpt::Level OptLevel)
: SelectionDAGISel(tm, OptLevel), TM(tm),
Subtarget(&TM.getSubtarget<ARM64Subtarget>()), ForCodeSize(false) {}
virtual const char *getPassName() const {
return "ARM64 Instruction Selection";
}
virtual bool runOnMachineFunction(MachineFunction &MF) {
AttributeSet FnAttrs = MF.getFunction()->getAttributes();
ForCodeSize =
FnAttrs.hasAttribute(AttributeSet::FunctionIndex,
Attribute::OptimizeForSize) ||
FnAttrs.hasAttribute(AttributeSet::FunctionIndex, Attribute::MinSize);
return SelectionDAGISel::runOnMachineFunction(MF);
}
SDNode *Select(SDNode *Node);
/// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
/// inline asm expressions.
virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
char ConstraintCode,
std::vector<SDValue> &OutOps);
SDNode *SelectMLAV64LaneV128(SDNode *N);
SDNode *SelectMULLV64LaneV128(unsigned IntNo, SDNode *N);
bool SelectArithExtendedRegister(SDValue N, SDValue &Reg, SDValue &Shift);
bool SelectArithImmed(SDValue N, SDValue &Val, SDValue &Shift);
bool SelectNegArithImmed(SDValue N, SDValue &Val, SDValue &Shift);
bool SelectArithShiftedRegister(SDValue N, SDValue &Reg, SDValue &Shift) {
return SelectShiftedRegister(N, false, Reg, Shift);
}
bool SelectLogicalShiftedRegister(SDValue N, SDValue &Reg, SDValue &Shift) {
return SelectShiftedRegister(N, true, Reg, Shift);
}
bool SelectAddrModeIndexed8(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeIndexed(N, 1, Base, OffImm);
}
bool SelectAddrModeIndexed16(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeIndexed(N, 2, Base, OffImm);
}
bool SelectAddrModeIndexed32(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeIndexed(N, 4, Base, OffImm);
}
bool SelectAddrModeIndexed64(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeIndexed(N, 8, Base, OffImm);
}
bool SelectAddrModeIndexed128(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeIndexed(N, 16, Base, OffImm);
}
bool SelectAddrModeUnscaled8(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeUnscaled(N, 1, Base, OffImm);
}
bool SelectAddrModeUnscaled16(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeUnscaled(N, 2, Base, OffImm);
}
bool SelectAddrModeUnscaled32(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeUnscaled(N, 4, Base, OffImm);
}
bool SelectAddrModeUnscaled64(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeUnscaled(N, 8, Base, OffImm);
}
bool SelectAddrModeUnscaled128(SDValue N, SDValue &Base, SDValue &OffImm) {
return SelectAddrModeUnscaled(N, 16, Base, OffImm);
}
bool SelectAddrModeRO8(SDValue N, SDValue &Base, SDValue &Offset,
SDValue &Imm) {
return SelectAddrModeRO(N, 1, Base, Offset, Imm);
}
bool SelectAddrModeRO16(SDValue N, SDValue &Base, SDValue &Offset,
SDValue &Imm) {
return SelectAddrModeRO(N, 2, Base, Offset, Imm);
}
bool SelectAddrModeRO32(SDValue N, SDValue &Base, SDValue &Offset,
SDValue &Imm) {
return SelectAddrModeRO(N, 4, Base, Offset, Imm);
}
bool SelectAddrModeRO64(SDValue N, SDValue &Base, SDValue &Offset,
SDValue &Imm) {
return SelectAddrModeRO(N, 8, Base, Offset, Imm);
}
bool SelectAddrModeRO128(SDValue N, SDValue &Base, SDValue &Offset,
SDValue &Imm) {
return SelectAddrModeRO(N, 16, Base, Offset, Imm);
}
bool SelectAddrModeNoIndex(SDValue N, SDValue &Val);
/// Form sequences of consecutive 64/128-bit registers for use in NEON
/// instructions making use of a vector-list (e.g. ldN, tbl). Vecs must have
/// between 1 and 4 elements. If it contains a single element that is returned
/// unchanged; otherwise a REG_SEQUENCE value is returned.
SDValue createDTuple(ArrayRef<SDValue> Vecs);
SDValue createQTuple(ArrayRef<SDValue> Vecs);
/// Generic helper for the createDTuple/createQTuple
/// functions. Those should almost always be called instead.
SDValue createTuple(ArrayRef<SDValue> Vecs, unsigned RegClassIDs[],
unsigned SubRegs[]);
SDNode *SelectTable(SDNode *N, unsigned NumVecs, unsigned Opc, bool isExt);
SDNode *SelectIndexedLoad(SDNode *N, bool &Done);
SDNode *SelectLoad(SDNode *N, unsigned NumVecs, unsigned Opc,
unsigned SubRegIdx);
SDNode *SelectLoadLane(SDNode *N, unsigned NumVecs, unsigned Opc);
SDNode *SelectStore(SDNode *N, unsigned NumVecs, unsigned Opc);
SDNode *SelectStoreLane(SDNode *N, unsigned NumVecs, unsigned Opc);
SDNode *SelectSIMDAddSubNarrowing(unsigned IntNo, SDNode *Node);
SDNode *SelectSIMDXtnNarrowing(unsigned IntNo, SDNode *Node);
SDNode *SelectBitfieldExtractOp(SDNode *N);
SDNode *SelectBitfieldInsertOp(SDNode *N);
SDNode *SelectLIBM(SDNode *N);
// Include the pieces autogenerated from the target description.
#include "ARM64GenDAGISel.inc"
private:
bool SelectShiftedRegister(SDValue N, bool AllowROR, SDValue &Reg,
SDValue &Shift);
bool SelectAddrModeIndexed(SDValue N, unsigned Size, SDValue &Base,
SDValue &OffImm);
bool SelectAddrModeUnscaled(SDValue N, unsigned Size, SDValue &Base,
SDValue &OffImm);
bool SelectAddrModeRO(SDValue N, unsigned Size, SDValue &Base,
SDValue &Offset, SDValue &Imm);
bool isWorthFolding(SDValue V) const;
bool SelectExtendedSHL(SDValue N, unsigned Size, SDValue &Offset,
SDValue &Imm);
template<unsigned RegWidth>
bool SelectCVTFixedPosOperand(SDValue N, SDValue &FixedPos) {
return SelectCVTFixedPosOperand(N, FixedPos, RegWidth);
}
bool SelectCVTFixedPosOperand(SDValue N, SDValue &FixedPos, unsigned Width);
};
} // end anonymous namespace
/// isIntImmediate - This method tests to see if the node is a constant
/// operand. If so Imm will receive the 32-bit value.
static bool isIntImmediate(const SDNode *N, uint64_t &Imm) {
if (const ConstantSDNode *C = dyn_cast<const ConstantSDNode>(N)) {
Imm = C->getZExtValue();
return true;
}
return false;
}
// isIntImmediate - This method tests to see if a constant operand.
// If so Imm will receive the value.
static bool isIntImmediate(SDValue N, uint64_t &Imm) {
return isIntImmediate(N.getNode(), Imm);
}
// isOpcWithIntImmediate - This method tests to see if the node is a specific
// opcode and that it has a immediate integer right operand.
// If so Imm will receive the 32 bit value.
static bool isOpcWithIntImmediate(const SDNode *N, unsigned Opc,
uint64_t &Imm) {
return N->getOpcode() == Opc &&
isIntImmediate(N->getOperand(1).getNode(), Imm);
}
bool ARM64DAGToDAGISel::SelectAddrModeNoIndex(SDValue N, SDValue &Val) {
EVT ValTy = N.getValueType();
if (ValTy != MVT::i64)
return false;
Val = N;
return true;
}
bool ARM64DAGToDAGISel::SelectInlineAsmMemoryOperand(
const SDValue &Op, char ConstraintCode, std::vector<SDValue> &OutOps) {
assert(ConstraintCode == 'm' && "unexpected asm memory constraint");
// Require the address to be in a register. That is safe for all ARM64
// variants and it is hard to do anything much smarter without knowing
// how the operand is used.
OutOps.push_back(Op);
return false;
}
/// SelectArithImmed - Select an immediate value that can be represented as
/// a 12-bit value shifted left by either 0 or 12. If so, return true with
/// Val set to the 12-bit value and Shift set to the shifter operand.
bool ARM64DAGToDAGISel::SelectArithImmed(SDValue N, SDValue &Val,
SDValue &Shift) {
// This function is called from the addsub_shifted_imm ComplexPattern,
// which lists [imm] as the list of opcode it's interested in, however
// we still need to check whether the operand is actually an immediate
// here because the ComplexPattern opcode list is only used in
// root-level opcode matching.
if (!isa<ConstantSDNode>(N.getNode()))
return false;
uint64_t Immed = cast<ConstantSDNode>(N.getNode())->getZExtValue();
unsigned ShiftAmt;
if (Immed >> 12 == 0) {
ShiftAmt = 0;
} else if ((Immed & 0xfff) == 0 && Immed >> 24 == 0) {
ShiftAmt = 12;
Immed = Immed >> 12;
} else
return false;
unsigned ShVal = ARM64_AM::getShifterImm(ARM64_AM::LSL, ShiftAmt);
Val = CurDAG->getTargetConstant(Immed, MVT::i32);
Shift = CurDAG->getTargetConstant(ShVal, MVT::i32);
return true;
}
/// SelectNegArithImmed - As above, but negates the value before trying to
/// select it.
bool ARM64DAGToDAGISel::SelectNegArithImmed(SDValue N, SDValue &Val,
SDValue &Shift) {
// This function is called from the addsub_shifted_imm ComplexPattern,
// which lists [imm] as the list of opcode it's interested in, however
// we still need to check whether the operand is actually an immediate
// here because the ComplexPattern opcode list is only used in
// root-level opcode matching.
if (!isa<ConstantSDNode>(N.getNode()))
return false;
// The immediate operand must be a 24-bit zero-extended immediate.
uint64_t Immed = cast<ConstantSDNode>(N.getNode())->getZExtValue();
// This negation is almost always valid, but "cmp wN, #0" and "cmn wN, #0"
// have the opposite effect on the C flag, so this pattern mustn't match under
// those circumstances.
if (Immed == 0)
return false;
if (N.getValueType() == MVT::i32)
Immed = ~((uint32_t)Immed) + 1;
else
Immed = ~Immed + 1ULL;
if (Immed & 0xFFFFFFFFFF000000ULL)
return false;
Immed &= 0xFFFFFFULL;
return SelectArithImmed(CurDAG->getConstant(Immed, MVT::i32), Val, Shift);
}
/// getShiftTypeForNode - Translate a shift node to the corresponding
/// ShiftType value.
static ARM64_AM::ShiftType getShiftTypeForNode(SDValue N) {
switch (N.getOpcode()) {
default:
return ARM64_AM::InvalidShift;
case ISD::SHL:
return ARM64_AM::LSL;
case ISD::SRL:
return ARM64_AM::LSR;
case ISD::SRA:
return ARM64_AM::ASR;
case ISD::ROTR:
return ARM64_AM::ROR;
}
}
/// \brief Determine wether it is worth to fold V into an extended register.
bool ARM64DAGToDAGISel::isWorthFolding(SDValue V) const {
// it hurts if the a value is used at least twice, unless we are optimizing
// for code size.
if (ForCodeSize || V.hasOneUse())
return true;
return false;
}
/// SelectShiftedRegister - Select a "shifted register" operand. If the value
/// is not shifted, set the Shift operand to default of "LSL 0". The logical
/// instructions allow the shifted register to be rotated, but the arithmetic
/// instructions do not. The AllowROR parameter specifies whether ROR is
/// supported.
bool ARM64DAGToDAGISel::SelectShiftedRegister(SDValue N, bool AllowROR,
SDValue &Reg, SDValue &Shift) {
ARM64_AM::ShiftType ShType = getShiftTypeForNode(N);
if (ShType == ARM64_AM::InvalidShift)
return false;
if (!AllowROR && ShType == ARM64_AM::ROR)
return false;
if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
unsigned BitSize = N.getValueType().getSizeInBits();
unsigned Val = RHS->getZExtValue() & (BitSize - 1);
unsigned ShVal = ARM64_AM::getShifterImm(ShType, Val);
Reg = N.getOperand(0);
Shift = CurDAG->getTargetConstant(ShVal, MVT::i32);
return isWorthFolding(N);
}
return false;
}
/// getExtendTypeForNode - Translate an extend node to the corresponding
/// ExtendType value.
static ARM64_AM::ExtendType getExtendTypeForNode(SDValue N,
bool IsLoadStore = false) {
if (N.getOpcode() == ISD::SIGN_EXTEND ||
N.getOpcode() == ISD::SIGN_EXTEND_INREG) {
EVT SrcVT;
if (N.getOpcode() == ISD::SIGN_EXTEND_INREG)
SrcVT = cast<VTSDNode>(N.getOperand(1))->getVT();
else
SrcVT = N.getOperand(0).getValueType();
if (!IsLoadStore && SrcVT == MVT::i8)
return ARM64_AM::SXTB;
else if (!IsLoadStore && SrcVT == MVT::i16)
return ARM64_AM::SXTH;
else if (SrcVT == MVT::i32)
return ARM64_AM::SXTW;
else if (SrcVT == MVT::i64)
return ARM64_AM::SXTX;
return ARM64_AM::InvalidExtend;
} else if (N.getOpcode() == ISD::ZERO_EXTEND ||
N.getOpcode() == ISD::ANY_EXTEND) {
EVT SrcVT = N.getOperand(0).getValueType();
if (!IsLoadStore && SrcVT == MVT::i8)
return ARM64_AM::UXTB;
else if (!IsLoadStore && SrcVT == MVT::i16)
return ARM64_AM::UXTH;
else if (SrcVT == MVT::i32)
return ARM64_AM::UXTW;
else if (SrcVT == MVT::i64)
return ARM64_AM::UXTX;
return ARM64_AM::InvalidExtend;
} else if (N.getOpcode() == ISD::AND) {
ConstantSDNode *CSD = dyn_cast<ConstantSDNode>(N.getOperand(1));
if (!CSD)
return ARM64_AM::InvalidExtend;
uint64_t AndMask = CSD->getZExtValue();
switch (AndMask) {
default:
return ARM64_AM::InvalidExtend;
case 0xFF:
return !IsLoadStore ? ARM64_AM::UXTB : ARM64_AM::InvalidExtend;
case 0xFFFF:
return !IsLoadStore ? ARM64_AM::UXTH : ARM64_AM::InvalidExtend;
case 0xFFFFFFFF:
return ARM64_AM::UXTW;
}
}
return ARM64_AM::InvalidExtend;
}
// Helper for SelectMLAV64LaneV128 - Recognize high lane extracts.
static bool checkHighLaneIndex(SDNode *DL, SDValue &LaneOp, int &LaneIdx) {
if (DL->getOpcode() != ARM64ISD::DUPLANE16 &&
DL->getOpcode() != ARM64ISD::DUPLANE32)
return false;
SDValue SV = DL->getOperand(0);
if (SV.getOpcode() != ISD::INSERT_SUBVECTOR)
return false;
SDValue EV = SV.getOperand(1);
if (EV.getOpcode() != ISD::EXTRACT_SUBVECTOR)
return false;
ConstantSDNode *DLidx = cast<ConstantSDNode>(DL->getOperand(1).getNode());
ConstantSDNode *EVidx = cast<ConstantSDNode>(EV.getOperand(1).getNode());
LaneIdx = DLidx->getSExtValue() + EVidx->getSExtValue();
LaneOp = EV.getOperand(0);
return true;
}
// Helper for SelectOpcV64LaneV128 - Recogzine operatinos where one operand is a
// high lane extract.
static bool checkV64LaneV128(SDValue Op0, SDValue Op1, SDValue &StdOp,
SDValue &LaneOp, int &LaneIdx) {
if (!checkHighLaneIndex(Op0.getNode(), LaneOp, LaneIdx)) {
std::swap(Op0, Op1);
if (!checkHighLaneIndex(Op0.getNode(), LaneOp, LaneIdx))
return false;
}
StdOp = Op1;
return true;
}
/// SelectMLAV64LaneV128 - ARM64 supports vector MLAs where one multiplicand is
/// a lane in the upper half of a 128-bit vector. Recognize and select this so
/// that we don't emit unnecessary lane extracts.
SDNode *ARM64DAGToDAGISel::SelectMLAV64LaneV128(SDNode *N) {
SDValue Op0 = N->getOperand(0);
SDValue Op1 = N->getOperand(1);
SDValue MLAOp1; // Will hold ordinary multiplicand for MLA.
SDValue MLAOp2; // Will hold lane-accessed multiplicand for MLA.
int LaneIdx = -1; // Will hold the lane index.
if (Op1.getOpcode() != ISD::MUL ||
!checkV64LaneV128(Op1.getOperand(0), Op1.getOperand(1), MLAOp1, MLAOp2,
LaneIdx)) {
std::swap(Op0, Op1);
if (Op1.getOpcode() != ISD::MUL ||
!checkV64LaneV128(Op1.getOperand(0), Op1.getOperand(1), MLAOp1, MLAOp2,
LaneIdx))
return 0;
}
SDValue LaneIdxVal = CurDAG->getTargetConstant(LaneIdx, MVT::i64);
SDValue Ops[] = { Op0, MLAOp1, MLAOp2, LaneIdxVal };
unsigned MLAOpc = ~0U;
switch (N->getSimpleValueType(0).SimpleTy) {
default:
llvm_unreachable("Unrecognized MLA.");
case MVT::v4i16:
MLAOpc = ARM64::MLAv4i16_indexed;
break;
case MVT::v8i16:
MLAOpc = ARM64::MLAv8i16_indexed;
break;
case MVT::v2i32:
MLAOpc = ARM64::MLAv2i32_indexed;
break;
case MVT::v4i32:
MLAOpc = ARM64::MLAv4i32_indexed;
break;
}
return CurDAG->getMachineNode(MLAOpc, SDLoc(N), N->getValueType(0), Ops);
}
SDNode *ARM64DAGToDAGISel::SelectMULLV64LaneV128(unsigned IntNo, SDNode *N) {
SDValue SMULLOp0;
SDValue SMULLOp1;
int LaneIdx;
if (!checkV64LaneV128(N->getOperand(1), N->getOperand(2), SMULLOp0, SMULLOp1,
LaneIdx))
return 0;
SDValue LaneIdxVal = CurDAG->getTargetConstant(LaneIdx, MVT::i64);
SDValue Ops[] = { SMULLOp0, SMULLOp1, LaneIdxVal };
unsigned SMULLOpc = ~0U;
if (IntNo == Intrinsic::arm64_neon_smull) {
switch (N->getSimpleValueType(0).SimpleTy) {
default:
llvm_unreachable("Unrecognized SMULL.");
case MVT::v4i32:
SMULLOpc = ARM64::SMULLv4i16_indexed;
break;
case MVT::v2i64:
SMULLOpc = ARM64::SMULLv2i32_indexed;
break;
}
} else if (IntNo == Intrinsic::arm64_neon_umull) {
switch (N->getSimpleValueType(0).SimpleTy) {
default:
llvm_unreachable("Unrecognized SMULL.");
case MVT::v4i32:
SMULLOpc = ARM64::UMULLv4i16_indexed;
break;
case MVT::v2i64:
SMULLOpc = ARM64::UMULLv2i32_indexed;
break;
}
} else
llvm_unreachable("Unrecognized intrinsic.");
return CurDAG->getMachineNode(SMULLOpc, SDLoc(N), N->getValueType(0), Ops);
}
/// SelectArithExtendedRegister - Select a "extended register" operand. This
/// operand folds in an extend followed by an optional left shift.
bool ARM64DAGToDAGISel::SelectArithExtendedRegister(SDValue N, SDValue &Reg,
SDValue &Shift) {
unsigned ShiftVal = 0;
ARM64_AM::ExtendType Ext;
if (N.getOpcode() == ISD::SHL) {
ConstantSDNode *CSD = dyn_cast<ConstantSDNode>(N.getOperand(1));
if (!CSD)
return false;
ShiftVal = CSD->getZExtValue();
if (ShiftVal > 4)
return false;
Ext = getExtendTypeForNode(N.getOperand(0));
if (Ext == ARM64_AM::InvalidExtend)
return false;
Reg = N.getOperand(0).getOperand(0);
} else {
Ext = getExtendTypeForNode(N);
if (Ext == ARM64_AM::InvalidExtend)
return false;
Reg = N.getOperand(0);
}
// ARM64 mandates that the RHS of the operation must use the smallest
// register classs that could contain the size being extended from. Thus,
// if we're folding a (sext i8), we need the RHS to be a GPR32, even though
// there might not be an actual 32-bit value in the program. We can
// (harmlessly) synthesize one by injected an EXTRACT_SUBREG here.
if (Reg.getValueType() == MVT::i64 && Ext != ARM64_AM::UXTX &&
Ext != ARM64_AM::SXTX) {
SDValue SubReg = CurDAG->getTargetConstant(ARM64::sub_32, MVT::i32);
MachineSDNode *Node = CurDAG->getMachineNode(
TargetOpcode::EXTRACT_SUBREG, SDLoc(N), MVT::i32, Reg, SubReg);
Reg = SDValue(Node, 0);
}
Shift = CurDAG->getTargetConstant(getArithExtendImm(Ext, ShiftVal), MVT::i32);
return isWorthFolding(N);
}
/// SelectAddrModeIndexed - Select a "register plus scaled unsigned 12-bit
/// immediate" address. The "Size" argument is the size in bytes of the memory
/// reference, which determines the scale.
bool ARM64DAGToDAGISel::SelectAddrModeIndexed(SDValue N, unsigned Size,
SDValue &Base, SDValue &OffImm) {
const TargetLowering *TLI = getTargetLowering();
if (N.getOpcode() == ISD::FrameIndex) {
int FI = cast<FrameIndexSDNode>(N)->getIndex();
Base = CurDAG->getTargetFrameIndex(FI, TLI->getPointerTy());
OffImm = CurDAG->getTargetConstant(0, MVT::i64);
return true;
}
if (N.getOpcode() == ARM64ISD::ADDlow) {
GlobalAddressSDNode *GAN =
dyn_cast<GlobalAddressSDNode>(N.getOperand(1).getNode());
Base = N.getOperand(0);
OffImm = N.getOperand(1);
if (!GAN)
return true;
const GlobalValue *GV = GAN->getGlobal();
unsigned Alignment = GV->getAlignment();
const DataLayout *DL = TLI->getDataLayout();
if (Alignment == 0 && !Subtarget->isTargetDarwin())
Alignment = DL->getABITypeAlignment(GV->getType()->getElementType());
if (Alignment >= Size)
return true;
}
if (CurDAG->isBaseWithConstantOffset(N)) {
if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
int64_t RHSC = (int64_t)RHS->getZExtValue();
unsigned Scale = Log2_32(Size);
if ((RHSC & (Size - 1)) == 0 && RHSC >= 0 && RHSC < (0x1000 << Scale)) {
Base = N.getOperand(0);
if (Base.getOpcode() == ISD::FrameIndex) {
int FI = cast<FrameIndexSDNode>(Base)->getIndex();
Base = CurDAG->getTargetFrameIndex(FI, TLI->getPointerTy());
}
OffImm = CurDAG->getTargetConstant(RHSC >> Scale, MVT::i64);
return true;
}
}
}
// Before falling back to our general case, check if the unscaled
// instructions can handle this. If so, that's preferable.
if (SelectAddrModeUnscaled(N, Size, Base, OffImm))
return false;
// Base only. The address will be materialized into a register before
// the memory is accessed.
// add x0, Xbase, #offset
// ldr x0, [x0]
Base = N;
OffImm = CurDAG->getTargetConstant(0, MVT::i64);
return true;
}
/// SelectAddrModeUnscaled - Select a "register plus unscaled signed 9-bit
/// immediate" address. This should only match when there is an offset that
/// is not valid for a scaled immediate addressing mode. The "Size" argument
/// is the size in bytes of the memory reference, which is needed here to know
/// what is valid for a scaled immediate.
bool ARM64DAGToDAGISel::SelectAddrModeUnscaled(SDValue N, unsigned Size,
SDValue &Base, SDValue &OffImm) {
if (!CurDAG->isBaseWithConstantOffset(N))
return false;
if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
int64_t RHSC = RHS->getSExtValue();
// If the offset is valid as a scaled immediate, don't match here.
if ((RHSC & (Size - 1)) == 0 && RHSC >= 0 &&
RHSC < (0x1000 << Log2_32(Size)))
return false;
if (RHSC >= -256 && RHSC < 256) {
Base = N.getOperand(0);
if (Base.getOpcode() == ISD::FrameIndex) {
int FI = cast<FrameIndexSDNode>(Base)->getIndex();
const TargetLowering *TLI = getTargetLowering();
Base = CurDAG->getTargetFrameIndex(FI, TLI->getPointerTy());
}
OffImm = CurDAG->getTargetConstant(RHSC, MVT::i64);
return true;
}
}
return false;
}
static SDValue Widen(SelectionDAG *CurDAG, SDValue N) {
SDValue SubReg = CurDAG->getTargetConstant(ARM64::sub_32, MVT::i32);
SDValue ImpDef = SDValue(
CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF, SDLoc(N), MVT::i64),
0);
MachineSDNode *Node = CurDAG->getMachineNode(
TargetOpcode::INSERT_SUBREG, SDLoc(N), MVT::i64, ImpDef, N, SubReg);
return SDValue(Node, 0);
}
static SDValue WidenIfNeeded(SelectionDAG *CurDAG, SDValue N) {
if (N.getValueType() == MVT::i32) {
return Widen(CurDAG, N);
}
return N;
}
/// \brief Check if the given SHL node (\p N), can be used to form an
/// extended register for an addressing mode.
bool ARM64DAGToDAGISel::SelectExtendedSHL(SDValue N, unsigned Size,
SDValue &Offset, SDValue &Imm) {
assert(N.getOpcode() == ISD::SHL && "Invalid opcode.");
ConstantSDNode *CSD = dyn_cast<ConstantSDNode>(N.getOperand(1));
if (CSD && (CSD->getZExtValue() & 0x7) == CSD->getZExtValue()) {
ARM64_AM::ExtendType Ext = getExtendTypeForNode(N.getOperand(0), true);
if (Ext == ARM64_AM::InvalidExtend) {
Ext = ARM64_AM::UXTX;
Offset = WidenIfNeeded(CurDAG, N.getOperand(0));
} else {
Offset = WidenIfNeeded(CurDAG, N.getOperand(0).getOperand(0));
}
unsigned LegalShiftVal = Log2_32(Size);
unsigned ShiftVal = CSD->getZExtValue();
if (ShiftVal != 0 && ShiftVal != LegalShiftVal)
return false;
Imm = CurDAG->getTargetConstant(
ARM64_AM::getMemExtendImm(Ext, ShiftVal != 0), MVT::i32);
if (isWorthFolding(N))
return true;
}
return false;
}
bool ARM64DAGToDAGISel::SelectAddrModeRO(SDValue N, unsigned Size,
SDValue &Base, SDValue &Offset,
SDValue &Imm) {
if (N.getOpcode() != ISD::ADD)
return false;
SDValue LHS = N.getOperand(0);
SDValue RHS = N.getOperand(1);
// We don't want to match immediate adds here, because they are better lowered
// to the register-immediate addressing modes.
if (isa<ConstantSDNode>(LHS) || isa<ConstantSDNode>(RHS))
return false;
// Check if this particular node is reused in any non-memory related
// operation. If yes, do not try to fold this node into the address
// computation, since the computation will be kept.
const SDNode *Node = N.getNode();
for (SDNode *UI : Node->uses()) {
if (!isa<MemSDNode>(*UI))
return false;
}
// Remember if it is worth folding N when it produces extended register.
bool IsExtendedRegisterWorthFolding = isWorthFolding(N);
// Try to match a shifted extend on the RHS.
if (IsExtendedRegisterWorthFolding && RHS.getOpcode() == ISD::SHL &&
SelectExtendedSHL(RHS, Size, Offset, Imm)) {
Base = LHS;
return true;
}
// Try to match a shifted extend on the LHS.
if (IsExtendedRegisterWorthFolding && LHS.getOpcode() == ISD::SHL &&
SelectExtendedSHL(LHS, Size, Offset, Imm)) {
Base = RHS;
return true;
}
ARM64_AM::ExtendType Ext = ARM64_AM::UXTX;
// Try to match an unshifted extend on the LHS.
if (IsExtendedRegisterWorthFolding &&
(Ext = getExtendTypeForNode(LHS, true)) != ARM64_AM::InvalidExtend) {
Base = RHS;
Offset = WidenIfNeeded(CurDAG, LHS.getOperand(0));
Imm = CurDAG->getTargetConstant(ARM64_AM::getMemExtendImm(Ext, false),
MVT::i32);
if (isWorthFolding(LHS))
return true;
}
// Try to match an unshifted extend on the RHS.
if (IsExtendedRegisterWorthFolding &&
(Ext = getExtendTypeForNode(RHS, true)) != ARM64_AM::InvalidExtend) {
Base = LHS;
Offset = WidenIfNeeded(CurDAG, RHS.getOperand(0));
Imm = CurDAG->getTargetConstant(ARM64_AM::getMemExtendImm(Ext, false),
MVT::i32);
if (isWorthFolding(RHS))
return true;
}
// Match any non-shifted, non-extend, non-immediate add expression.
Base = LHS;
Offset = WidenIfNeeded(CurDAG, RHS);
Ext = ARM64_AM::UXTX;
Imm = CurDAG->getTargetConstant(ARM64_AM::getMemExtendImm(Ext, false),
MVT::i32);
// Reg1 + Reg2 is free: no check needed.
return true;
}
SDValue ARM64DAGToDAGISel::createDTuple(ArrayRef<SDValue> Regs) {
static unsigned RegClassIDs[] = { ARM64::DDRegClassID, ARM64::DDDRegClassID,
ARM64::DDDDRegClassID };
static unsigned SubRegs[] = { ARM64::dsub0, ARM64::dsub1,
ARM64::dsub2, ARM64::dsub3 };
return createTuple(Regs, RegClassIDs, SubRegs);
}
SDValue ARM64DAGToDAGISel::createQTuple(ArrayRef<SDValue> Regs) {
static unsigned RegClassIDs[] = { ARM64::QQRegClassID, ARM64::QQQRegClassID,
ARM64::QQQQRegClassID };
static unsigned SubRegs[] = { ARM64::qsub0, ARM64::qsub1,
ARM64::qsub2, ARM64::qsub3 };
return createTuple(Regs, RegClassIDs, SubRegs);
}
SDValue ARM64DAGToDAGISel::createTuple(ArrayRef<SDValue> Regs,
unsigned RegClassIDs[],
unsigned SubRegs[]) {
// There's no special register-class for a vector-list of 1 element: it's just
// a vector.
if (Regs.size() == 1)
return Regs[0];
assert(Regs.size() >= 2 && Regs.size() <= 4);
SDLoc DL(Regs[0].getNode());
SmallVector<SDValue, 4> Ops;
// First operand of REG_SEQUENCE is the desired RegClass.
Ops.push_back(
CurDAG->getTargetConstant(RegClassIDs[Regs.size() - 2], MVT::i32));
// Then we get pairs of source & subregister-position for the components.
for (unsigned i = 0; i < Regs.size(); ++i) {
Ops.push_back(Regs[i]);
Ops.push_back(CurDAG->getTargetConstant(SubRegs[i], MVT::i32));
}
SDNode *N =
CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, DL, MVT::Untyped, Ops);
return SDValue(N, 0);
}
SDNode *ARM64DAGToDAGISel::SelectTable(SDNode *N, unsigned NumVecs,
unsigned Opc, bool isExt) {
SDLoc dl(N);
EVT VT = N->getValueType(0);
unsigned ExtOff = isExt;
// Form a REG_SEQUENCE to force register allocation.
unsigned Vec0Off = ExtOff + 1;
SmallVector<SDValue, 4> Regs(N->op_begin() + Vec0Off,
N->op_begin() + Vec0Off + NumVecs);
SDValue RegSeq = createQTuple(Regs);
SmallVector<SDValue, 6> Ops;
if (isExt)
Ops.push_back(N->getOperand(1));
Ops.push_back(RegSeq);
Ops.push_back(N->getOperand(NumVecs + ExtOff + 1));
return CurDAG->getMachineNode(Opc, dl, VT, Ops);
}
SDNode *ARM64DAGToDAGISel::SelectIndexedLoad(SDNode *N, bool &Done) {
LoadSDNode *LD = cast<LoadSDNode>(N);
if (LD->isUnindexed())
return NULL;
EVT VT = LD->getMemoryVT();
EVT DstVT = N->getValueType(0);
ISD::MemIndexedMode AM = LD->getAddressingMode();
bool IsPre = AM == ISD::PRE_INC || AM == ISD::PRE_DEC;
// We're not doing validity checking here. That was done when checking
// if we should mark the load as indexed or not. We're just selecting
// the right instruction.
unsigned Opcode = 0;
ISD::LoadExtType ExtType = LD->getExtensionType();
bool InsertTo64 = false;
if (VT == MVT::i64)
Opcode = IsPre ? ARM64::LDRXpre_isel : ARM64::LDRXpost_isel;
else if (VT == MVT::i32) {
if (ExtType == ISD::NON_EXTLOAD)
Opcode = IsPre ? ARM64::LDRWpre_isel : ARM64::LDRWpost_isel;
else if (ExtType == ISD::SEXTLOAD)
Opcode = IsPre ? ARM64::LDRSWpre_isel : ARM64::LDRSWpost_isel;
else {
Opcode = IsPre ? ARM64::LDRWpre_isel : ARM64::LDRWpost_isel;
InsertTo64 = true;
// The result of the load is only i32. It's the subreg_to_reg that makes
// it into an i64.
DstVT = MVT::i32;
}
} else if (VT == MVT::i16) {
if (ExtType == ISD::SEXTLOAD) {
if (DstVT == MVT::i64)
Opcode = IsPre ? ARM64::LDRSHXpre_isel : ARM64::LDRSHXpost_isel;
else
Opcode = IsPre ? ARM64::LDRSHWpre_isel : ARM64::LDRSHWpost_isel;
} else {
Opcode = IsPre ? ARM64::LDRHHpre_isel : ARM64::LDRHHpost_isel;
InsertTo64 = DstVT == MVT::i64;
// The result of the load is only i32. It's the subreg_to_reg that makes
// it into an i64.
DstVT = MVT::i32;
}
} else if (VT == MVT::i8) {
if (ExtType == ISD::SEXTLOAD) {
if (DstVT == MVT::i64)
Opcode = IsPre ? ARM64::LDRSBXpre_isel : ARM64::LDRSBXpost_isel;
else
Opcode = IsPre ? ARM64::LDRSBWpre_isel : ARM64::LDRSBWpost_isel;
} else {
Opcode = IsPre ? ARM64::LDRBBpre_isel : ARM64::LDRBBpost_isel;
InsertTo64 = DstVT == MVT::i64;
// The result of the load is only i32. It's the subreg_to_reg that makes
// it into an i64.
DstVT = MVT::i32;
}
} else if (VT == MVT::f32) {
Opcode = IsPre ? ARM64::LDRSpre_isel : ARM64::LDRSpost_isel;
} else if (VT == MVT::f64) {
Opcode = IsPre ? ARM64::LDRDpre_isel : ARM64::LDRDpost_isel;
} else
return NULL;
SDValue Chain = LD->getChain();
SDValue Base = LD->getBasePtr();
ConstantSDNode *OffsetOp = cast<ConstantSDNode>(LD->getOffset());
int OffsetVal = (int)OffsetOp->getZExtValue();
SDValue Offset = CurDAG->getTargetConstant(OffsetVal, MVT::i64);
SDValue Ops[] = { Base, Offset, Chain };
SDNode *Res = CurDAG->getMachineNode(Opcode, SDLoc(N), DstVT, MVT::i64,
MVT::Other, Ops);
// Either way, we're replacing the node, so tell the caller that.
Done = true;
if (InsertTo64) {
SDValue SubReg = CurDAG->getTargetConstant(ARM64::sub_32, MVT::i32);
SDNode *Sub = CurDAG->getMachineNode(
ARM64::SUBREG_TO_REG, SDLoc(N), MVT::i64,
CurDAG->getTargetConstant(0, MVT::i64), SDValue(Res, 0), SubReg);
ReplaceUses(SDValue(N, 0), SDValue(Sub, 0));
ReplaceUses(SDValue(N, 1), SDValue(Res, 1));
ReplaceUses(SDValue(N, 2), SDValue(Res, 2));
return 0;
}
return Res;
}
SDNode *ARM64DAGToDAGISel::SelectLoad(SDNode *N, unsigned NumVecs, unsigned Opc,
unsigned SubRegIdx) {
SDLoc dl(N);
EVT VT = N->getValueType(0);
SDValue Chain = N->getOperand(0);
SmallVector<SDValue, 6> Ops;
Ops.push_back(N->getOperand(2)); // Mem operand;
Ops.push_back(Chain);
std::vector<EVT> ResTys;
ResTys.push_back(MVT::Untyped);
ResTys.push_back(MVT::Other);
SDNode *Ld = CurDAG->getMachineNode(Opc, dl, ResTys, Ops);
SDValue SuperReg = SDValue(Ld, 0);
// MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
// MemOp[0] = cast<MemIntrinsicSDNode>(N)->getMemOperand();
// cast<MachineSDNode>(Ld)->setMemRefs(MemOp, MemOp + 1);
switch (NumVecs) {
case 4:
ReplaceUses(SDValue(N, 3), CurDAG->getTargetExtractSubreg(SubRegIdx + 3, dl,
VT, SuperReg));
// FALLTHROUGH
case 3:
ReplaceUses(SDValue(N, 2), CurDAG->getTargetExtractSubreg(SubRegIdx + 2, dl,
VT, SuperReg));
// FALLTHROUGH
case 2:
ReplaceUses(SDValue(N, 1), CurDAG->getTargetExtractSubreg(SubRegIdx + 1, dl,
VT, SuperReg));
ReplaceUses(SDValue(N, 0),
CurDAG->getTargetExtractSubreg(SubRegIdx, dl, VT, SuperReg));
break;
case 1:
ReplaceUses(SDValue(N, 0), SuperReg);
break;
}
ReplaceUses(SDValue(N, NumVecs), SDValue(Ld, 1));
return 0;
}
SDNode *ARM64DAGToDAGISel::SelectStore(SDNode *N, unsigned NumVecs,
unsigned Opc) {
SDLoc dl(N);
EVT VT = N->getOperand(2)->getValueType(0);
// Form a REG_SEQUENCE to force register allocation.
bool Is128Bit = VT.getSizeInBits() == 128;
SmallVector<SDValue, 4> Regs(N->op_begin() + 2, N->op_begin() + 2 + NumVecs);
SDValue RegSeq = Is128Bit ? createQTuple(Regs) : createDTuple(Regs);
SmallVector<SDValue, 6> Ops;
Ops.push_back(RegSeq);
Ops.push_back(N->getOperand(NumVecs + 2));
Ops.push_back(N->getOperand(0));
SDNode *St = CurDAG->getMachineNode(Opc, dl, N->getValueType(0), Ops);
return St;
}
/// WidenVector - Given a value in the V64 register class, produce the
/// equivalent value in the V128 register class.
class WidenVector {
SelectionDAG &DAG;
public:
WidenVector(SelectionDAG &DAG) : DAG(DAG) {}
SDValue operator()(SDValue V64Reg) {
EVT VT = V64Reg.getValueType();
unsigned NarrowSize = VT.getVectorNumElements();
MVT EltTy = VT.getVectorElementType().getSimpleVT();
MVT WideTy = MVT::getVectorVT(EltTy, 2 * NarrowSize);
SDLoc DL(V64Reg);
SDValue Undef =
SDValue(DAG.getMachineNode(TargetOpcode::IMPLICIT_DEF, DL, WideTy), 0);
return DAG.getTargetInsertSubreg(ARM64::dsub, DL, WideTy, Undef, V64Reg);
}
};
/// NarrowVector - Given a value in the V128 register class, produce the
/// equivalent value in the V64 register class.
static SDValue NarrowVector(SDValue V128Reg, SelectionDAG &DAG) {
EVT VT = V128Reg.getValueType();
unsigned WideSize = VT.getVectorNumElements();
MVT EltTy = VT.getVectorElementType().getSimpleVT();
MVT NarrowTy = MVT::getVectorVT(EltTy, WideSize / 2);
return DAG.getTargetExtractSubreg(ARM64::dsub, SDLoc(V128Reg), NarrowTy,
V128Reg);
}
SDNode *ARM64DAGToDAGISel::SelectLoadLane(SDNode *N, unsigned NumVecs,
unsigned Opc) {
SDLoc dl(N);
EVT VT = N->getValueType(0);
bool Narrow = VT.getSizeInBits() == 64;
// Form a REG_SEQUENCE to force register allocation.
SmallVector<SDValue, 4> Regs(N->op_begin() + 2, N->op_begin() + 2 + NumVecs);
if (Narrow)
std::transform(Regs.begin(), Regs.end(), Regs.begin(),
WidenVector(*CurDAG));
SDValue RegSeq = createQTuple(Regs);
std::vector<EVT> ResTys;
ResTys.push_back(MVT::Untyped);
ResTys.push_back(MVT::Other);
unsigned LaneNo =
cast<ConstantSDNode>(N->getOperand(NumVecs + 2))->getZExtValue();
SmallVector<SDValue, 6> Ops;
Ops.push_back(RegSeq);
Ops.push_back(CurDAG->getTargetConstant(LaneNo, MVT::i64));
Ops.push_back(N->getOperand(NumVecs + 3));
Ops.push_back(N->getOperand(0));
SDNode *Ld = CurDAG->getMachineNode(Opc, dl, ResTys, Ops);
SDValue SuperReg = SDValue(Ld, 0);
EVT WideVT = RegSeq.getOperand(1)->getValueType(0);
switch (NumVecs) {
case 4: {
SDValue NV3 =
CurDAG->getTargetExtractSubreg(ARM64::qsub3, dl, WideVT, SuperReg);
if (Narrow)
ReplaceUses(SDValue(N, 3), NarrowVector(NV3, *CurDAG));
else
ReplaceUses(SDValue(N, 3), NV3);
}
// FALLTHROUGH
case 3: {
SDValue NV2 =
CurDAG->getTargetExtractSubreg(ARM64::qsub2, dl, WideVT, SuperReg);
if (Narrow)
ReplaceUses(SDValue(N, 2), NarrowVector(NV2, *CurDAG));
else
ReplaceUses(SDValue(N, 2), NV2);
}
// FALLTHROUGH
case 2: {
SDValue NV1 =
CurDAG->getTargetExtractSubreg(ARM64::qsub1, dl, WideVT, SuperReg);
SDValue NV0 =
CurDAG->getTargetExtractSubreg(ARM64::qsub0, dl, WideVT, SuperReg);
if (Narrow) {
ReplaceUses(SDValue(N, 1), NarrowVector(NV1, *CurDAG));
ReplaceUses(SDValue(N, 0), NarrowVector(NV0, *CurDAG));
} else {
ReplaceUses(SDValue(N, 1), NV1);
ReplaceUses(SDValue(N, 0), NV0);
}
break;
}
}
ReplaceUses(SDValue(N, NumVecs), SDValue(Ld, 1));
return Ld;
}
SDNode *ARM64DAGToDAGISel::SelectStoreLane(SDNode *N, unsigned NumVecs,
unsigned Opc) {
SDLoc dl(N);
EVT VT = N->getOperand(2)->getValueType(0);
bool Narrow = VT.getSizeInBits() == 64;
// Form a REG_SEQUENCE to force register allocation.
SmallVector<SDValue, 4> Regs(N->op_begin() + 2, N->op_begin() + 2 + NumVecs);
if (Narrow)
std::transform(Regs.begin(), Regs.end(), Regs.begin(),
WidenVector(*CurDAG));
SDValue RegSeq = createQTuple(Regs);
unsigned LaneNo =
cast<ConstantSDNode>(N->getOperand(NumVecs + 2))->getZExtValue();
SmallVector<SDValue, 6> Ops;
Ops.push_back(RegSeq);
Ops.push_back(CurDAG->getTargetConstant(LaneNo, MVT::i64));
Ops.push_back(N->getOperand(NumVecs + 3));
Ops.push_back(N->getOperand(0));
SDNode *St = CurDAG->getMachineNode(Opc, dl, MVT::Other, Ops);
// Transfer memoperands.
MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
MemOp[0] = cast<MemIntrinsicSDNode>(N)->getMemOperand();
cast<MachineSDNode>(St)->setMemRefs(MemOp, MemOp + 1);
return St;
}
static bool isBitfieldExtractOpFromAnd(SelectionDAG *CurDAG, SDNode *N,
unsigned &Opc, SDValue &Opd0,
unsigned &LSB, unsigned &MSB,
unsigned NumberOfIgnoredLowBits,
bool BiggerPattern) {
assert(N->getOpcode() == ISD::AND &&
"N must be a AND operation to call this function");
EVT VT = N->getValueType(0);
// Here we can test the type of VT and return false when the type does not
// match, but since it is done prior to that call in the current context
// we turned that into an assert to avoid redundant code.
assert((VT == MVT::i32 || VT == MVT::i64) &&
"Type checking must have been done before calling this function");
// FIXME: simplify-demanded-bits in DAGCombine will probably have
// changed the AND node to a 32-bit mask operation. We'll have to
// undo that as part of the transform here if we want to catch all
// the opportunities.
// Currently the NumberOfIgnoredLowBits argument helps to recover
// form these situations when matching bigger pattern (bitfield insert).
// For unsigned extracts, check for a shift right and mask
uint64_t And_imm = 0;
if (!isOpcWithIntImmediate(N, ISD::AND, And_imm))
return false;
const SDNode *Op0 = N->getOperand(0).getNode();
// Because of simplify-demanded-bits in DAGCombine, the mask may have been
// simplified. Try to undo that
And_imm |= (1 << NumberOfIgnoredLowBits) - 1;
// The immediate is a mask of the low bits iff imm & (imm+1) == 0
if (And_imm & (And_imm + 1))
return false;
bool ClampMSB = false;
uint64_t Srl_imm = 0;
// Handle the SRL + ANY_EXTEND case.
if (VT == MVT::i64 && Op0->getOpcode() == ISD::ANY_EXTEND &&
isOpcWithIntImmediate(Op0->getOperand(0).getNode(), ISD::SRL, Srl_imm)) {
// Extend the incoming operand of the SRL to 64-bit.
Opd0 = Widen(CurDAG, Op0->getOperand(0).getOperand(0));
// Make sure to clamp the MSB so that we preserve the semantics of the
// original operations.
ClampMSB = true;
} else if (VT == MVT::i32 && Op0->getOpcode() == ISD::TRUNCATE &&
isOpcWithIntImmediate(Op0->getOperand(0).getNode(), ISD::SRL,
Srl_imm)) {
// If the shift result was truncated, we can still combine them.
Opd0 = Op0->getOperand(0).getOperand(0);
// Use the type of SRL node.
VT = Opd0->getValueType(0);
} else if (isOpcWithIntImmediate(Op0, ISD::SRL, Srl_imm)) {
Opd0 = Op0->getOperand(0);
} else if (BiggerPattern) {
// Let's pretend a 0 shift right has been performed.
// The resulting code will be at least as good as the original one
// plus it may expose more opportunities for bitfield insert pattern.
// FIXME: Currently we limit this to the bigger pattern, because
// some optimizations expect AND and not UBFM
Opd0 = N->getOperand(0);
} else
return false;
assert((BiggerPattern || (Srl_imm > 0 && Srl_imm < VT.getSizeInBits())) &&
"bad amount in shift node!");
LSB = Srl_imm;
MSB = Srl_imm + (VT == MVT::i32 ? CountTrailingOnes_32(And_imm)
: CountTrailingOnes_64(And_imm)) -
1;
if (ClampMSB)
// Since we're moving the extend before the right shift operation, we need
// to clamp the MSB to make sure we don't shift in undefined bits instead of
// the zeros which would get shifted in with the original right shift
// operation.
MSB = MSB > 31 ? 31 : MSB;
Opc = VT == MVT::i32 ? ARM64::UBFMWri : ARM64::UBFMXri;
return true;
}
static bool isOneBitExtractOpFromShr(SDNode *N, unsigned &Opc, SDValue &Opd0,
unsigned &LSB, unsigned &MSB) {
// We are looking for the following pattern which basically extracts a single
// bit from the source value and places it in the LSB of the destination
// value, all other bits of the destination value or set to zero:
//
// Value2 = AND Value, MaskImm
// SRL Value2, ShiftImm
//
// with MaskImm >> ShiftImm == 1.
//
// This gets selected into a single UBFM:
//
// UBFM Value, ShiftImm, ShiftImm
//
if (N->getOpcode() != ISD::SRL)
return false;
uint64_t And_mask = 0;
if (!isOpcWithIntImmediate(N->getOperand(0).getNode(), ISD::AND, And_mask))
return false;
Opd0 = N->getOperand(0).getOperand(0);
uint64_t Srl_imm = 0;
if (!isIntImmediate(N->getOperand(1), Srl_imm))
return false;
// Check whether we really have a one bit extract here.
if (And_mask >> Srl_imm == 0x1) {
if (N->getValueType(0) == MVT::i32)
Opc = ARM64::UBFMWri;
else
Opc = ARM64::UBFMXri;
LSB = MSB = Srl_imm;
return true;
}
return false;
}
static bool isBitfieldExtractOpFromShr(SDNode *N, unsigned &Opc, SDValue &Opd0,
unsigned &LSB, unsigned &MSB,
bool BiggerPattern) {
assert((N->getOpcode() == ISD::SRA || N->getOpcode() == ISD::SRL) &&
"N must be a SHR/SRA operation to call this function");
EVT VT = N->getValueType(0);
// Here we can test the type of VT and return false when the type does not
// match, but since it is done prior to that call in the current context
// we turned that into an assert to avoid redundant code.
assert((VT == MVT::i32 || VT == MVT::i64) &&
"Type checking must have been done before calling this function");
// Check for AND + SRL doing a one bit extract.
if (isOneBitExtractOpFromShr(N, Opc, Opd0, LSB, MSB))
return true;
// we're looking for a shift of a shift
uint64_t Shl_imm = 0;
uint64_t Trunc_bits = 0;
if (isOpcWithIntImmediate(N->getOperand(0).getNode(), ISD::SHL, Shl_imm)) {
Opd0 = N->getOperand(0).getOperand(0);
} else if (VT == MVT::i32 && N->getOpcode() == ISD::SRL &&
N->getOperand(0).getNode()->getOpcode() == ISD::TRUNCATE) {
// We are looking for a shift of truncate. Truncate from i64 to i32 could
// be considered as setting high 32 bits as zero. Our strategy here is to
// always generate 64bit UBFM. This consistency will help the CSE pass
// later find more redundancy.
Opd0 = N->getOperand(0).getOperand(0);
Trunc_bits = Opd0->getValueType(0).getSizeInBits() - VT.getSizeInBits();
VT = Opd0->getValueType(0);
assert(VT == MVT::i64 && "the promoted type should be i64");
} else if (BiggerPattern) {
// Let's pretend a 0 shift left has been performed.
// FIXME: Currently we limit this to the bigger pattern case,
// because some optimizations expect AND and not UBFM
Opd0 = N->getOperand(0);
} else
return false;
assert(Shl_imm < VT.getSizeInBits() && "bad amount in shift node!");
uint64_t Srl_imm = 0;
if (!isIntImmediate(N->getOperand(1), Srl_imm))
return false;
assert(Srl_imm > 0 && Srl_imm < VT.getSizeInBits() &&
"bad amount in shift node!");
// Note: The width operand is encoded as width-1.
unsigned Width = VT.getSizeInBits() - Trunc_bits - Srl_imm - 1;
int sLSB = Srl_imm - Shl_imm;
if (sLSB < 0)
return false;
LSB = sLSB;
MSB = LSB + Width;
// SRA requires a signed extraction
if (VT == MVT::i32)
Opc = N->getOpcode() == ISD::SRA ? ARM64::SBFMWri : ARM64::UBFMWri;
else
Opc = N->getOpcode() == ISD::SRA ? ARM64::SBFMXri : ARM64::UBFMXri;
return true;
}
static bool isBitfieldExtractOp(SelectionDAG *CurDAG, SDNode *N, unsigned &Opc,
SDValue &Opd0, unsigned &LSB, unsigned &MSB,
unsigned NumberOfIgnoredLowBits = 0,
bool BiggerPattern = false) {
if (N->getValueType(0) != MVT::i32 && N->getValueType(0) != MVT::i64)
return false;
switch (N->getOpcode()) {
default:
if (!N->isMachineOpcode())
return false;
break;
case ISD::AND:
return isBitfieldExtractOpFromAnd(CurDAG, N, Opc, Opd0, LSB, MSB,
NumberOfIgnoredLowBits, BiggerPattern);
case ISD::SRL:
case ISD::SRA:
return isBitfieldExtractOpFromShr(N, Opc, Opd0, LSB, MSB, BiggerPattern);
}
unsigned NOpc = N->getMachineOpcode();
switch (NOpc) {
default:
return false;
case ARM64::SBFMWri:
case ARM64::UBFMWri:
case ARM64::SBFMXri:
case ARM64::UBFMXri:
Opc = NOpc;
Opd0 = N->getOperand(0);
LSB = cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
MSB = cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
return true;
}
// Unreachable
return false;
}
SDNode *ARM64DAGToDAGISel::SelectBitfieldExtractOp(SDNode *N) {
unsigned Opc, LSB, MSB;
SDValue Opd0;
if (!isBitfieldExtractOp(CurDAG, N, Opc, Opd0, LSB, MSB))
return NULL;
EVT VT = N->getValueType(0);
// If the bit extract operation is 64bit but the original type is 32bit, we
// need to add one EXTRACT_SUBREG.
if ((Opc == ARM64::SBFMXri || Opc == ARM64::UBFMXri) && VT == MVT::i32) {
SDValue Ops64[] = {Opd0, CurDAG->getTargetConstant(LSB, MVT::i64),
CurDAG->getTargetConstant(MSB, MVT::i64)};
SDNode *BFM = CurDAG->getMachineNode(Opc, SDLoc(N), MVT::i64, Ops64);
SDValue SubReg = CurDAG->getTargetConstant(ARM64::sub_32, MVT::i32);
MachineSDNode *Node =
CurDAG->getMachineNode(TargetOpcode::EXTRACT_SUBREG, SDLoc(N), MVT::i32,
SDValue(BFM, 0), SubReg);
return Node;
}
SDValue Ops[] = {Opd0, CurDAG->getTargetConstant(LSB, VT),
CurDAG->getTargetConstant(MSB, VT)};
return CurDAG->SelectNodeTo(N, Opc, VT, Ops, 3);
}
// Is mask a i32 or i64 binary sequence 1..10..0 and
// CountTrailingZeros(mask) == ExpectedTrailingZeros
static bool isHighMask(uint64_t Mask, unsigned ExpectedTrailingZeros,
unsigned NumberOfIgnoredHighBits, EVT VT) {
assert((VT == MVT::i32 || VT == MVT::i64) &&
"i32 or i64 mask type expected!");
uint64_t ExpectedMask;
if (VT == MVT::i32) {
uint32_t ExpectedMaski32 = ~0 << ExpectedTrailingZeros;
ExpectedMask = ExpectedMaski32;
if (NumberOfIgnoredHighBits) {
uint32_t highMask = ~0 << (32 - NumberOfIgnoredHighBits);
Mask |= highMask;
}
} else {
ExpectedMask = ((uint64_t) ~0) << ExpectedTrailingZeros;
if (NumberOfIgnoredHighBits)
Mask |= ((uint64_t) ~0) << (64 - NumberOfIgnoredHighBits);
}
return Mask == ExpectedMask;
}
// Look for bits that will be useful for later uses.
// A bit is consider useless as soon as it is dropped and never used
// before it as been dropped.
// E.g., looking for useful bit of x
// 1. y = x & 0x7
// 2. z = y >> 2
// After #1, x useful bits are 0x7, then the useful bits of x, live through
// y.
// After #2, the useful bits of x are 0x4.
// However, if x is used on an unpredicatable instruction, then all its bits
// are useful.
// E.g.
// 1. y = x & 0x7
// 2. z = y >> 2
// 3. str x, [@x]
static void getUsefulBits(SDValue Op, APInt &UsefulBits, unsigned Depth = 0);
static void getUsefulBitsFromAndWithImmediate(SDValue Op, APInt &UsefulBits,
unsigned Depth) {
uint64_t Imm =
cast<const ConstantSDNode>(Op.getOperand(1).getNode())->getZExtValue();
Imm = ARM64_AM::decodeLogicalImmediate(Imm, UsefulBits.getBitWidth());
UsefulBits &= APInt(UsefulBits.getBitWidth(), Imm);
getUsefulBits(Op, UsefulBits, Depth + 1);
}
static void getUsefulBitsFromBitfieldMoveOpd(SDValue Op, APInt &UsefulBits,
uint64_t Imm, uint64_t MSB,
unsigned Depth) {
// inherit the bitwidth value
APInt OpUsefulBits(UsefulBits);
OpUsefulBits = 1;
if (MSB >= Imm) {
OpUsefulBits = OpUsefulBits.shl(MSB - Imm + 1);
--OpUsefulBits;
// The interesting part will be in the lower part of the result
getUsefulBits(Op, OpUsefulBits, Depth + 1);
// The interesting part was starting at Imm in the argument
OpUsefulBits = OpUsefulBits.shl(Imm);
} else {
OpUsefulBits = OpUsefulBits.shl(MSB + 1);
--OpUsefulBits;
// The interesting part will be shifted in the result
OpUsefulBits = OpUsefulBits.shl(OpUsefulBits.getBitWidth() - Imm);
getUsefulBits(Op, OpUsefulBits, Depth + 1);
// The interesting part was at zero in the argument
OpUsefulBits = OpUsefulBits.lshr(OpUsefulBits.getBitWidth() - Imm);
}
UsefulBits &= OpUsefulBits;
}
static void getUsefulBitsFromUBFM(SDValue Op, APInt &UsefulBits,
unsigned Depth) {
uint64_t Imm =
cast<const ConstantSDNode>(Op.getOperand(1).getNode())->getZExtValue();
uint64_t MSB =
cast<const ConstantSDNode>(Op.getOperand(2).getNode())->getZExtValue();
getUsefulBitsFromBitfieldMoveOpd(Op, UsefulBits, Imm, MSB, Depth);
}
static void getUsefulBitsFromOrWithShiftedReg(SDValue Op, APInt &UsefulBits,
unsigned Depth) {
uint64_t ShiftTypeAndValue =
cast<const ConstantSDNode>(Op.getOperand(2).getNode())->getZExtValue();
APInt Mask(UsefulBits);
Mask.clearAllBits();
Mask.flipAllBits();
if (ARM64_AM::getShiftType(ShiftTypeAndValue) == ARM64_AM::LSL) {
// Shift Left
uint64_t ShiftAmt = ARM64_AM::getShiftValue(ShiftTypeAndValue);
Mask = Mask.shl(ShiftAmt);
getUsefulBits(Op, Mask, Depth + 1);
Mask = Mask.lshr(ShiftAmt);
} else if (ARM64_AM::getShiftType(ShiftTypeAndValue) == ARM64_AM::LSR) {
// Shift Right
// We do not handle ARM64_AM::ASR, because the sign will change the
// number of useful bits
uint64_t ShiftAmt = ARM64_AM::getShiftValue(ShiftTypeAndValue);
Mask = Mask.lshr(ShiftAmt);
getUsefulBits(Op, Mask, Depth + 1);
Mask = Mask.shl(ShiftAmt);
} else
return;
UsefulBits &= Mask;
}
static void getUsefulBitsFromBFM(SDValue Op, SDValue Orig, APInt &UsefulBits,
unsigned Depth) {
uint64_t Imm =
cast<const ConstantSDNode>(Op.getOperand(2).getNode())->getZExtValue();
uint64_t MSB =
cast<const ConstantSDNode>(Op.getOperand(3).getNode())->getZExtValue();
if (Op.getOperand(1) == Orig)
return getUsefulBitsFromBitfieldMoveOpd(Op, UsefulBits, Imm, MSB, Depth);
APInt OpUsefulBits(UsefulBits);
OpUsefulBits = 1;
if (MSB >= Imm) {
OpUsefulBits = OpUsefulBits.shl(MSB - Imm + 1);
--OpUsefulBits;
UsefulBits &= ~OpUsefulBits;
getUsefulBits(Op, UsefulBits, Depth + 1);
} else {
OpUsefulBits = OpUsefulBits.shl(MSB + 1);
--OpUsefulBits;
UsefulBits = ~(OpUsefulBits.shl(OpUsefulBits.getBitWidth() - Imm));
getUsefulBits(Op, UsefulBits, Depth + 1);
}
}
static void getUsefulBitsForUse(SDNode *UserNode, APInt &UsefulBits,
SDValue Orig, unsigned Depth) {
// Users of this node should have already been instruction selected
// FIXME: Can we turn that into an assert?
if (!UserNode->isMachineOpcode())
return;
switch (UserNode->getMachineOpcode()) {
default:
return;
case ARM64::ANDSWri:
case ARM64::ANDSXri:
case ARM64::ANDWri:
case ARM64::ANDXri:
// We increment Depth only when we call the getUsefulBits
return getUsefulBitsFromAndWithImmediate(SDValue(UserNode, 0), UsefulBits,
Depth);
case ARM64::UBFMWri:
case ARM64::UBFMXri:
return getUsefulBitsFromUBFM(SDValue(UserNode, 0), UsefulBits, Depth);
case ARM64::ORRWrs:
case ARM64::ORRXrs:
if (UserNode->getOperand(1) != Orig)
return;
return getUsefulBitsFromOrWithShiftedReg(SDValue(UserNode, 0), UsefulBits,
Depth);
case ARM64::BFMWri:
case ARM64::BFMXri:
return getUsefulBitsFromBFM(SDValue(UserNode, 0), Orig, UsefulBits, Depth);
}
}
static void getUsefulBits(SDValue Op, APInt &UsefulBits, unsigned Depth) {
if (Depth >= 6)
return;
// Initialize UsefulBits
if (!Depth) {
unsigned Bitwidth = Op.getValueType().getScalarType().getSizeInBits();
// At the beginning, assume every produced bits is useful
UsefulBits = APInt(Bitwidth, 0);
UsefulBits.flipAllBits();
}
APInt UsersUsefulBits(UsefulBits.getBitWidth(), 0);
for (SDNode *Node : Op.getNode()->uses()) {
// A use cannot produce useful bits
APInt UsefulBitsForUse = APInt(UsefulBits);
getUsefulBitsForUse(Node, UsefulBitsForUse, Op, Depth);
UsersUsefulBits |= UsefulBitsForUse;
}
// UsefulBits contains the produced bits that are meaningful for the
// current definition, thus a user cannot make a bit meaningful at
// this point
UsefulBits &= UsersUsefulBits;
}
// Given a OR operation, check if we have the following pattern
// ubfm c, b, imm, imm2 (or something that does the same jobs, see
// isBitfieldExtractOp)
// d = e & mask2 ; where mask is a binary sequence of 1..10..0 and
// countTrailingZeros(mask2) == imm2 - imm + 1
// f = d | c
// if yes, given reference arguments will be update so that one can replace
// the OR instruction with:
// f = Opc Opd0, Opd1, LSB, MSB ; where Opc is a BFM, LSB = imm, and MSB = imm2
static bool isBitfieldInsertOpFromOr(SDNode *N, unsigned &Opc, SDValue &Opd0,
SDValue &Opd1, unsigned &LSB,
unsigned &MSB, SelectionDAG *CurDAG) {
assert(N->getOpcode() == ISD::OR && "Expect a OR operation");
// Set Opc
EVT VT = N->getValueType(0);
if (VT == MVT::i32)
Opc = ARM64::BFMWri;
else if (VT == MVT::i64)
Opc = ARM64::BFMXri;
else
return false;
// Because of simplify-demanded-bits in DAGCombine, involved masks may not
// have the expected shape. Try to undo that.
APInt UsefulBits;
getUsefulBits(SDValue(N, 0), UsefulBits);
unsigned NumberOfIgnoredLowBits = UsefulBits.countTrailingZeros();
unsigned NumberOfIgnoredHighBits = UsefulBits.countLeadingZeros();
// OR is commutative, check both possibilities (does llvm provide a
// way to do that directely, e.g., via code matcher?)
SDValue OrOpd1Val = N->getOperand(1);
SDNode *OrOpd0 = N->getOperand(0).getNode();
SDNode *OrOpd1 = N->getOperand(1).getNode();
for (int i = 0; i < 2;
++i, std::swap(OrOpd0, OrOpd1), OrOpd1Val = N->getOperand(0)) {
unsigned BFXOpc;
// Set Opd1, LSB and MSB arguments by looking for
// c = ubfm b, imm, imm2
if (!isBitfieldExtractOp(CurDAG, OrOpd0, BFXOpc, Opd1, LSB, MSB,
NumberOfIgnoredLowBits, true))
continue;
// Check that the returned opcode is compatible with the pattern,
// i.e., same type and zero extended (U and not S)
if ((BFXOpc != ARM64::UBFMXri && VT == MVT::i64) ||
(BFXOpc != ARM64::UBFMWri && VT == MVT::i32))
continue;
// Compute the width of the bitfield insertion
int sMSB = MSB - LSB + 1;
// FIXME: This constraints is to catch bitfield insertion we may
// want to widen the pattern if we want to grab general bitfied
// move case
if (sMSB <= 0)
continue;
// Check the second part of the pattern
EVT VT = OrOpd1->getValueType(0);
if (VT != MVT::i32 && VT != MVT::i64)
continue;
// Compute the Known Zero for the candidate of the first operand.
// This allows to catch more general case than just looking for
// AND with imm. Indeed, simplify-demanded-bits may have removed
// the AND instruction because it proves it was useless.
APInt KnownZero, KnownOne;
CurDAG->ComputeMaskedBits(OrOpd1Val, KnownZero, KnownOne);
// Check if there is enough room for the second operand to appear
// in the first one
if (KnownZero.countTrailingOnes() < (unsigned)sMSB)
continue;
// Set the first operand
uint64_t Imm;
if (isOpcWithIntImmediate(OrOpd1, ISD::AND, Imm) &&
isHighMask(Imm, sMSB, NumberOfIgnoredHighBits, VT))
// In that case, we can eliminate the AND
Opd0 = OrOpd1->getOperand(0);
else
// Maybe the AND has been removed by simplify-demanded-bits
// or is useful because it discards more bits
Opd0 = OrOpd1Val;
// both parts match
return true;
}
return false;
}
SDNode *ARM64DAGToDAGISel::SelectBitfieldInsertOp(SDNode *N) {
if (N->getOpcode() != ISD::OR)
return NULL;
unsigned Opc;
unsigned LSB, MSB;
SDValue Opd0, Opd1;
if (!isBitfieldInsertOpFromOr(N, Opc, Opd0, Opd1, LSB, MSB, CurDAG))
return NULL;
EVT VT = N->getValueType(0);
SDValue Ops[] = { Opd0,
Opd1,
CurDAG->getTargetConstant(LSB, VT),
CurDAG->getTargetConstant(MSB, VT) };
return CurDAG->SelectNodeTo(N, Opc, VT, Ops, 4);
}
SDNode *ARM64DAGToDAGISel::SelectLIBM(SDNode *N) {
EVT VT = N->getValueType(0);
unsigned Variant;
unsigned Opc;
unsigned FRINTXOpcs[] = { ARM64::FRINTXSr, ARM64::FRINTXDr };
if (VT == MVT::f32) {
Variant = 0;
} else if (VT == MVT::f64) {
Variant = 1;
} else
return 0; // Unrecognized argument type. Fall back on default codegen.
// Pick the FRINTX variant needed to set the flags.
unsigned FRINTXOpc = FRINTXOpcs[Variant];
switch (N->getOpcode()) {
default:
return 0; // Unrecognized libm ISD node. Fall back on default codegen.
case ISD::FCEIL: {
unsigned FRINTPOpcs[] = { ARM64::FRINTPSr, ARM64::FRINTPDr };
Opc = FRINTPOpcs[Variant];
break;
}
case ISD::FFLOOR: {
unsigned FRINTMOpcs[] = { ARM64::FRINTMSr, ARM64::FRINTMDr };
Opc = FRINTMOpcs[Variant];
break;
}
case ISD::FTRUNC: {
unsigned FRINTZOpcs[] = { ARM64::FRINTZSr, ARM64::FRINTZDr };
Opc = FRINTZOpcs[Variant];
break;
}
case ISD::FROUND: {
unsigned FRINTAOpcs[] = { ARM64::FRINTASr, ARM64::FRINTADr };
Opc = FRINTAOpcs[Variant];
break;
}
}
SDLoc dl(N);
SDValue In = N->getOperand(0);
SmallVector<SDValue, 2> Ops;
Ops.push_back(In);
if (!TM.Options.UnsafeFPMath) {
SDNode *FRINTX = CurDAG->getMachineNode(FRINTXOpc, dl, VT, MVT::Glue, In);
Ops.push_back(SDValue(FRINTX, 1));
}
return CurDAG->getMachineNode(Opc, dl, VT, Ops);
}
bool
ARM64DAGToDAGISel::SelectCVTFixedPosOperand(SDValue N, SDValue &FixedPos,
unsigned RegWidth) {
APFloat FVal(0.0);
if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(N))
FVal = CN->getValueAPF();
else if (LoadSDNode *LN = dyn_cast<LoadSDNode>(N)) {
// Some otherwise illegal constants are allowed in this case.
if (LN->getOperand(1).getOpcode() != ARM64ISD::ADDlow ||
!isa<ConstantPoolSDNode>(LN->getOperand(1)->getOperand(1)))
return false;
ConstantPoolSDNode *CN =
dyn_cast<ConstantPoolSDNode>(LN->getOperand(1)->getOperand(1));
FVal = cast<ConstantFP>(CN->getConstVal())->getValueAPF();
} else
return false;
// An FCVT[SU] instruction performs: convertToInt(Val * 2^fbits) where fbits
// is between 1 and 32 for a destination w-register, or 1 and 64 for an
// x-register.
//
// By this stage, we've detected (fp_to_[su]int (fmul Val, THIS_NODE)) so we
// want THIS_NODE to be 2^fbits. This is much easier to deal with using
// integers.
bool IsExact;
// fbits is between 1 and 64 in the worst-case, which means the fmul
// could have 2^64 as an actual operand. Need 65 bits of precision.
APSInt IntVal(65, true);
FVal.convertToInteger(IntVal, APFloat::rmTowardZero, &IsExact);
// N.b. isPowerOf2 also checks for > 0.
if (!IsExact || !IntVal.isPowerOf2()) return false;
unsigned FBits = IntVal.logBase2();
// Checks above should have guaranteed that we haven't lost information in
// finding FBits, but it must still be in range.
if (FBits == 0 || FBits > RegWidth) return false;
FixedPos = CurDAG->getTargetConstant(FBits, MVT::i32);
return true;
}
SDNode *ARM64DAGToDAGISel::Select(SDNode *Node) {
// Dump information about the Node being selected
DEBUG(errs() << "Selecting: ");
DEBUG(Node->dump(CurDAG));
DEBUG(errs() << "\n");
// If we have a custom node, we already have selected!
if (Node->isMachineOpcode()) {
DEBUG(errs() << "== "; Node->dump(CurDAG); errs() << "\n");
Node->setNodeId(-1);
return NULL;
}
// Few custom selection stuff.
SDNode *ResNode = 0;
EVT VT = Node->getValueType(0);
switch (Node->getOpcode()) {
default:
break;
case ISD::ADD:
if (SDNode *I = SelectMLAV64LaneV128(Node))
return I;
break;
case ISD::LOAD: {
// Try to select as an indexed load. Fall through to normal processing
// if we can't.
bool Done = false;
SDNode *I = SelectIndexedLoad(Node, Done);
if (Done)
return I;
break;
}
case ISD::SRL:
case ISD::AND:
case ISD::SRA:
if (SDNode *I = SelectBitfieldExtractOp(Node))
return I;
break;
case ISD::OR:
if (SDNode *I = SelectBitfieldInsertOp(Node))
return I;
break;
case ISD::EXTRACT_VECTOR_ELT: {
// Extracting lane zero is a special case where we can just use a plain
// EXTRACT_SUBREG instruction, which will become FMOV. This is easier for
// the rest of the compiler, especially the register allocator and copyi
// propagation, to reason about, so is preferred when it's possible to
// use it.
ConstantSDNode *LaneNode = cast<ConstantSDNode>(Node->getOperand(1));
// Bail and use the default Select() for non-zero lanes.
if (LaneNode->getZExtValue() != 0)
break;
// If the element type is not the same as the result type, likewise
// bail and use the default Select(), as there's more to do than just
// a cross-class COPY. This catches extracts of i8 and i16 elements
// since they will need an explicit zext.
if (VT != Node->getOperand(0).getValueType().getVectorElementType())
break;
unsigned SubReg;
switch (Node->getOperand(0)
.getValueType()
.getVectorElementType()
.getSizeInBits()) {
default:
assert(0 && "Unexpected vector element type!");
case 64:
SubReg = ARM64::dsub;
break;
case 32:
SubReg = ARM64::ssub;
break;
case 16: // FALLTHROUGH
case 8:
llvm_unreachable("unexpected zext-requiring extract element!");
}
SDValue Extract = CurDAG->getTargetExtractSubreg(SubReg, SDLoc(Node), VT,
Node->getOperand(0));
DEBUG(dbgs() << "ISEL: Custom selection!\n=> ");
DEBUG(Extract->dumpr(CurDAG));
DEBUG(dbgs() << "\n");
return Extract.getNode();
}
case ISD::Constant: {
// Materialize zero constants as copies from WZR/XZR. This allows
// the coalescer to propagate these into other instructions.
ConstantSDNode *ConstNode = cast<ConstantSDNode>(Node);
if (ConstNode->isNullValue()) {
if (VT == MVT::i32)
return CurDAG->getCopyFromReg(CurDAG->getEntryNode(), SDLoc(Node),
ARM64::WZR, MVT::i32).getNode();
else if (VT == MVT::i64)
return CurDAG->getCopyFromReg(CurDAG->getEntryNode(), SDLoc(Node),
ARM64::XZR, MVT::i64).getNode();
}
break;
}
case ISD::FrameIndex: {
// Selects to ADDXri FI, 0 which in turn will become ADDXri SP, imm.
int FI = cast<FrameIndexSDNode>(Node)->getIndex();
unsigned Shifter = ARM64_AM::getShifterImm(ARM64_AM::LSL, 0);
const TargetLowering *TLI = getTargetLowering();
SDValue TFI = CurDAG->getTargetFrameIndex(FI, TLI->getPointerTy());
SDValue Ops[] = { TFI, CurDAG->getTargetConstant(0, MVT::i32),
CurDAG->getTargetConstant(Shifter, MVT::i32) };
return CurDAG->SelectNodeTo(Node, ARM64::ADDXri, MVT::i64, Ops, 3);
}
case ISD::INTRINSIC_W_CHAIN: {
unsigned IntNo = cast<ConstantSDNode>(Node->getOperand(1))->getZExtValue();
switch (IntNo) {
default:
break;
case Intrinsic::arm64_ldaxp:
case Intrinsic::arm64_ldxp: {
unsigned Op =
IntNo == Intrinsic::arm64_ldaxp ? ARM64::LDAXPX : ARM64::LDXPX;
SDValue MemAddr = Node->getOperand(2);
SDLoc DL(Node);
SDValue Chain = Node->getOperand(0);
SDNode *Ld = CurDAG->getMachineNode(Op, DL, MVT::i64, MVT::i64,
MVT::Other, MemAddr, Chain);
// Transfer memoperands.
MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
MemOp[0] = cast<MemIntrinsicSDNode>(Node)->getMemOperand();
cast<MachineSDNode>(Ld)->setMemRefs(MemOp, MemOp + 1);
return Ld;
}
case Intrinsic::arm64_stlxp:
case Intrinsic::arm64_stxp: {
unsigned Op =
IntNo == Intrinsic::arm64_stlxp ? ARM64::STLXPX : ARM64::STXPX;
SDLoc DL(Node);
SDValue Chain = Node->getOperand(0);
SDValue ValLo = Node->getOperand(2);
SDValue ValHi = Node->getOperand(3);
SDValue MemAddr = Node->getOperand(4);
// Place arguments in the right order.
SmallVector<SDValue, 7> Ops;
Ops.push_back(ValLo);
Ops.push_back(ValHi);
Ops.push_back(MemAddr);
Ops.push_back(Chain);
SDNode *St = CurDAG->getMachineNode(Op, DL, MVT::i32, MVT::Other, Ops);
// Transfer memoperands.
MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
MemOp[0] = cast<MemIntrinsicSDNode>(Node)->getMemOperand();
cast<MachineSDNode>(St)->setMemRefs(MemOp, MemOp + 1);
return St;
}
case Intrinsic::arm64_neon_ld1x2:
if (VT == MVT::v8i8)
return SelectLoad(Node, 2, ARM64::LD1Twov8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 2, ARM64::LD1Twov16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 2, ARM64::LD1Twov4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 2, ARM64::LD1Twov8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 2, ARM64::LD1Twov2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 2, ARM64::LD1Twov4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 2, ARM64::LD1Twov1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 2, ARM64::LD1Twov2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld1x3:
if (VT == MVT::v8i8)
return SelectLoad(Node, 3, ARM64::LD1Threev8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 3, ARM64::LD1Threev16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 3, ARM64::LD1Threev4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 3, ARM64::LD1Threev8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 3, ARM64::LD1Threev2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 3, ARM64::LD1Threev4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 3, ARM64::LD1Threev1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 3, ARM64::LD1Threev2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld1x4:
if (VT == MVT::v8i8)
return SelectLoad(Node, 4, ARM64::LD1Fourv8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 4, ARM64::LD1Fourv16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 4, ARM64::LD1Fourv4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 4, ARM64::LD1Fourv8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 4, ARM64::LD1Fourv2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 4, ARM64::LD1Fourv4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 4, ARM64::LD1Fourv1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 4, ARM64::LD1Fourv2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld2:
if (VT == MVT::v8i8)
return SelectLoad(Node, 2, ARM64::LD2Twov8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 2, ARM64::LD2Twov16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 2, ARM64::LD2Twov4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 2, ARM64::LD2Twov8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 2, ARM64::LD2Twov2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 2, ARM64::LD2Twov4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 2, ARM64::LD1Twov1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 2, ARM64::LD2Twov2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld3:
if (VT == MVT::v8i8)
return SelectLoad(Node, 3, ARM64::LD3Threev8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 3, ARM64::LD3Threev16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 3, ARM64::LD3Threev4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 3, ARM64::LD3Threev8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 3, ARM64::LD3Threev2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 3, ARM64::LD3Threev4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 3, ARM64::LD1Threev1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 3, ARM64::LD3Threev2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld4:
if (VT == MVT::v8i8)
return SelectLoad(Node, 4, ARM64::LD4Fourv8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 4, ARM64::LD4Fourv16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 4, ARM64::LD4Fourv4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 4, ARM64::LD4Fourv8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 4, ARM64::LD4Fourv2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 4, ARM64::LD4Fourv4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 4, ARM64::LD1Fourv1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 4, ARM64::LD4Fourv2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld2r:
if (VT == MVT::v8i8)
return SelectLoad(Node, 2, ARM64::LD2Rv8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 2, ARM64::LD2Rv16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 2, ARM64::LD2Rv4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 2, ARM64::LD2Rv8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 2, ARM64::LD2Rv2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 2, ARM64::LD2Rv4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 2, ARM64::LD2Rv1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 2, ARM64::LD2Rv2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld3r:
if (VT == MVT::v8i8)
return SelectLoad(Node, 3, ARM64::LD3Rv8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 3, ARM64::LD3Rv16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 3, ARM64::LD3Rv4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 3, ARM64::LD3Rv8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 3, ARM64::LD3Rv2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 3, ARM64::LD3Rv4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 3, ARM64::LD3Rv1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 3, ARM64::LD3Rv2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld4r:
if (VT == MVT::v8i8)
return SelectLoad(Node, 4, ARM64::LD4Rv8b, ARM64::dsub0);
else if (VT == MVT::v16i8)
return SelectLoad(Node, 4, ARM64::LD4Rv16b, ARM64::qsub0);
else if (VT == MVT::v4i16)
return SelectLoad(Node, 4, ARM64::LD4Rv4h, ARM64::dsub0);
else if (VT == MVT::v8i16)
return SelectLoad(Node, 4, ARM64::LD4Rv8h, ARM64::qsub0);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectLoad(Node, 4, ARM64::LD4Rv2s, ARM64::dsub0);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectLoad(Node, 4, ARM64::LD4Rv4s, ARM64::qsub0);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectLoad(Node, 4, ARM64::LD4Rv1d, ARM64::dsub0);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectLoad(Node, 4, ARM64::LD4Rv2d, ARM64::qsub0);
break;
case Intrinsic::arm64_neon_ld2lane:
if (VT == MVT::v16i8 || VT == MVT::v8i8)
return SelectLoadLane(Node, 2, ARM64::LD2i8);
else if (VT == MVT::v8i16 || VT == MVT::v4i16)
return SelectLoadLane(Node, 2, ARM64::LD2i16);
else if (VT == MVT::v4i32 || VT == MVT::v2i32 || VT == MVT::v4f32 ||
VT == MVT::v2f32)
return SelectLoadLane(Node, 2, ARM64::LD2i32);
else if (VT == MVT::v2i64 || VT == MVT::v1i64 || VT == MVT::v2f64 ||
VT == MVT::v1f64)
return SelectLoadLane(Node, 2, ARM64::LD2i64);
break;
case Intrinsic::arm64_neon_ld3lane:
if (VT == MVT::v16i8 || VT == MVT::v8i8)
return SelectLoadLane(Node, 3, ARM64::LD3i8);
else if (VT == MVT::v8i16 || VT == MVT::v4i16)
return SelectLoadLane(Node, 3, ARM64::LD3i16);
else if (VT == MVT::v4i32 || VT == MVT::v2i32 || VT == MVT::v4f32 ||
VT == MVT::v2f32)
return SelectLoadLane(Node, 3, ARM64::LD3i32);
else if (VT == MVT::v2i64 || VT == MVT::v1i64 || VT == MVT::v2f64 ||
VT == MVT::v1f64)
return SelectLoadLane(Node, 3, ARM64::LD3i64);
break;
case Intrinsic::arm64_neon_ld4lane:
if (VT == MVT::v16i8 || VT == MVT::v8i8)
return SelectLoadLane(Node, 4, ARM64::LD4i8);
else if (VT == MVT::v8i16 || VT == MVT::v4i16)
return SelectLoadLane(Node, 4, ARM64::LD4i16);
else if (VT == MVT::v4i32 || VT == MVT::v2i32 || VT == MVT::v4f32 ||
VT == MVT::v2f32)
return SelectLoadLane(Node, 4, ARM64::LD4i32);
else if (VT == MVT::v2i64 || VT == MVT::v1i64 || VT == MVT::v2f64 ||
VT == MVT::v1f64)
return SelectLoadLane(Node, 4, ARM64::LD4i64);
break;
}
} break;
case ISD::INTRINSIC_WO_CHAIN: {
unsigned IntNo = cast<ConstantSDNode>(Node->getOperand(0))->getZExtValue();
switch (IntNo) {
default:
break;
case Intrinsic::arm64_neon_tbl2:
return SelectTable(Node, 2, VT == MVT::v8i8 ? ARM64::TBLv8i8Two
: ARM64::TBLv16i8Two,
false);
case Intrinsic::arm64_neon_tbl3:
return SelectTable(Node, 3, VT == MVT::v8i8 ? ARM64::TBLv8i8Three
: ARM64::TBLv16i8Three,
false);
case Intrinsic::arm64_neon_tbl4:
return SelectTable(Node, 4, VT == MVT::v8i8 ? ARM64::TBLv8i8Four
: ARM64::TBLv16i8Four,
false);
case Intrinsic::arm64_neon_tbx2:
return SelectTable(Node, 2, VT == MVT::v8i8 ? ARM64::TBXv8i8Two
: ARM64::TBXv16i8Two,
true);
case Intrinsic::arm64_neon_tbx3:
return SelectTable(Node, 3, VT == MVT::v8i8 ? ARM64::TBXv8i8Three
: ARM64::TBXv16i8Three,
true);
case Intrinsic::arm64_neon_tbx4:
return SelectTable(Node, 4, VT == MVT::v8i8 ? ARM64::TBXv8i8Four
: ARM64::TBXv16i8Four,
true);
case Intrinsic::arm64_neon_smull:
case Intrinsic::arm64_neon_umull:
if (SDNode *N = SelectMULLV64LaneV128(IntNo, Node))
return N;
break;
}
break;
}
case ISD::INTRINSIC_VOID: {
unsigned IntNo = cast<ConstantSDNode>(Node->getOperand(1))->getZExtValue();
if (Node->getNumOperands() >= 3)
VT = Node->getOperand(2)->getValueType(0);
switch (IntNo) {
default:
break;
case Intrinsic::arm64_neon_st1x2: {
if (VT == MVT::v8i8)
return SelectStore(Node, 2, ARM64::ST1Twov8b);
else if (VT == MVT::v16i8)
return SelectStore(Node, 2, ARM64::ST1Twov16b);
else if (VT == MVT::v4i16)
return SelectStore(Node, 2, ARM64::ST1Twov4h);
else if (VT == MVT::v8i16)
return SelectStore(Node, 2, ARM64::ST1Twov8h);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectStore(Node, 2, ARM64::ST1Twov2s);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectStore(Node, 2, ARM64::ST1Twov4s);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectStore(Node, 2, ARM64::ST1Twov2d);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectStore(Node, 2, ARM64::ST1Twov1d);
break;
}
case Intrinsic::arm64_neon_st1x3: {
if (VT == MVT::v8i8)
return SelectStore(Node, 3, ARM64::ST1Threev8b);
else if (VT == MVT::v16i8)
return SelectStore(Node, 3, ARM64::ST1Threev16b);
else if (VT == MVT::v4i16)
return SelectStore(Node, 3, ARM64::ST1Threev4h);
else if (VT == MVT::v8i16)
return SelectStore(Node, 3, ARM64::ST1Threev8h);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectStore(Node, 3, ARM64::ST1Threev2s);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectStore(Node, 3, ARM64::ST1Threev4s);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectStore(Node, 3, ARM64::ST1Threev2d);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectStore(Node, 3, ARM64::ST1Threev1d);
break;
}
case Intrinsic::arm64_neon_st1x4: {
if (VT == MVT::v8i8)
return SelectStore(Node, 4, ARM64::ST1Fourv8b);
else if (VT == MVT::v16i8)
return SelectStore(Node, 4, ARM64::ST1Fourv16b);
else if (VT == MVT::v4i16)
return SelectStore(Node, 4, ARM64::ST1Fourv4h);
else if (VT == MVT::v8i16)
return SelectStore(Node, 4, ARM64::ST1Fourv8h);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectStore(Node, 4, ARM64::ST1Fourv2s);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectStore(Node, 4, ARM64::ST1Fourv4s);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectStore(Node, 4, ARM64::ST1Fourv2d);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectStore(Node, 4, ARM64::ST1Fourv1d);
break;
}
case Intrinsic::arm64_neon_st2: {
if (VT == MVT::v8i8)
return SelectStore(Node, 2, ARM64::ST2Twov8b);
else if (VT == MVT::v16i8)
return SelectStore(Node, 2, ARM64::ST2Twov16b);
else if (VT == MVT::v4i16)
return SelectStore(Node, 2, ARM64::ST2Twov4h);
else if (VT == MVT::v8i16)
return SelectStore(Node, 2, ARM64::ST2Twov8h);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectStore(Node, 2, ARM64::ST2Twov2s);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectStore(Node, 2, ARM64::ST2Twov4s);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectStore(Node, 2, ARM64::ST2Twov2d);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectStore(Node, 2, ARM64::ST1Twov1d);
break;
}
case Intrinsic::arm64_neon_st3: {
if (VT == MVT::v8i8)
return SelectStore(Node, 3, ARM64::ST3Threev8b);
else if (VT == MVT::v16i8)
return SelectStore(Node, 3, ARM64::ST3Threev16b);
else if (VT == MVT::v4i16)
return SelectStore(Node, 3, ARM64::ST3Threev4h);
else if (VT == MVT::v8i16)
return SelectStore(Node, 3, ARM64::ST3Threev8h);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectStore(Node, 3, ARM64::ST3Threev2s);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectStore(Node, 3, ARM64::ST3Threev4s);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectStore(Node, 3, ARM64::ST3Threev2d);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectStore(Node, 3, ARM64::ST1Threev1d);
break;
}
case Intrinsic::arm64_neon_st4: {
if (VT == MVT::v8i8)
return SelectStore(Node, 4, ARM64::ST4Fourv8b);
else if (VT == MVT::v16i8)
return SelectStore(Node, 4, ARM64::ST4Fourv16b);
else if (VT == MVT::v4i16)
return SelectStore(Node, 4, ARM64::ST4Fourv4h);
else if (VT == MVT::v8i16)
return SelectStore(Node, 4, ARM64::ST4Fourv8h);
else if (VT == MVT::v2i32 || VT == MVT::v2f32)
return SelectStore(Node, 4, ARM64::ST4Fourv2s);
else if (VT == MVT::v4i32 || VT == MVT::v4f32)
return SelectStore(Node, 4, ARM64::ST4Fourv4s);
else if (VT == MVT::v2i64 || VT == MVT::v2f64)
return SelectStore(Node, 4, ARM64::ST4Fourv2d);
else if (VT == MVT::v1i64 || VT == MVT::v1f64)
return SelectStore(Node, 4, ARM64::ST1Fourv1d);
break;
}
case Intrinsic::arm64_neon_st2lane: {
if (VT == MVT::v16i8 || VT == MVT::v8i8)
return SelectStoreLane(Node, 2, ARM64::ST2i8);
else if (VT == MVT::v8i16 || VT == MVT::v4i16)
return SelectStoreLane(Node, 2, ARM64::ST2i16);
else if (VT == MVT::v4i32 || VT == MVT::v2i32 || VT == MVT::v4f32 ||
VT == MVT::v2f32)
return SelectStoreLane(Node, 2, ARM64::ST2i32);
else if (VT == MVT::v2i64 || VT == MVT::v1i64 || VT == MVT::v2f64 ||
VT == MVT::v1f64)
return SelectStoreLane(Node, 2, ARM64::ST2i64);
break;
}
case Intrinsic::arm64_neon_st3lane: {
if (VT == MVT::v16i8 || VT == MVT::v8i8)
return SelectStoreLane(Node, 3, ARM64::ST3i8);
else if (VT == MVT::v8i16 || VT == MVT::v4i16)
return SelectStoreLane(Node, 3, ARM64::ST3i16);
else if (VT == MVT::v4i32 || VT == MVT::v2i32 || VT == MVT::v4f32 ||
VT == MVT::v2f32)
return SelectStoreLane(Node, 3, ARM64::ST3i32);
else if (VT == MVT::v2i64 || VT == MVT::v1i64 || VT == MVT::v2f64 ||
VT == MVT::v1f64)
return SelectStoreLane(Node, 3, ARM64::ST3i64);
break;
}
case Intrinsic::arm64_neon_st4lane: {
if (VT == MVT::v16i8 || VT == MVT::v8i8)
return SelectStoreLane(Node, 4, ARM64::ST4i8);
else if (VT == MVT::v8i16 || VT == MVT::v4i16)
return SelectStoreLane(Node, 4, ARM64::ST4i16);
else if (VT == MVT::v4i32 || VT == MVT::v2i32 || VT == MVT::v4f32 ||
VT == MVT::v2f32)
return SelectStoreLane(Node, 4, ARM64::ST4i32);
else if (VT == MVT::v2i64 || VT == MVT::v1i64 || VT == MVT::v2f64 ||
VT == MVT::v1f64)
return SelectStoreLane(Node, 4, ARM64::ST4i64);
break;
}
}
}
case ISD::FCEIL:
case ISD::FFLOOR:
case ISD::FTRUNC:
case ISD::FROUND:
if (SDNode *I = SelectLIBM(Node))
return I;
break;
}
// Select the default instruction
ResNode = SelectCode(Node);
DEBUG(errs() << "=> ");
if (ResNode == NULL || ResNode == Node)
DEBUG(Node->dump(CurDAG));
else
DEBUG(ResNode->dump(CurDAG));
DEBUG(errs() << "\n");
return ResNode;
}
/// createARM64ISelDag - This pass converts a legalized DAG into a
/// ARM64-specific DAG, ready for instruction scheduling.
FunctionPass *llvm::createARM64ISelDag(ARM64TargetMachine &TM,
CodeGenOpt::Level OptLevel) {
return new ARM64DAGToDAGISel(TM, OptLevel);
}
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