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llvm-mirror/lib/Target/Mips/MipsISelLowering.h
Sjoerd Meijer 8238653a0e [TargetLowering] Change getOptimalMemOpType to take a function attribute list 
The MachineFunction wasn't used in getOptimalMemOpType, but more importantly,
this allows reuse of findOptimalMemOpLowering that is calling getOptimalMemOpType.

This is the groundwork for the changes in D59766 and D59787, that allows
implementation of TTI::getMemcpyCost.

Differential Revision: https://reviews.llvm.org/D59785

llvm-svn: 359537
2019-04-30 08:38:12 +00:00

729 lines
27 KiB
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//===- MipsISelLowering.h - Mips DAG Lowering Interface ---------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the interfaces that Mips uses to lower LLVM code into a
// selection DAG.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_MIPS_MIPSISELLOWERING_H
#define LLVM_LIB_TARGET_MIPS_MIPSISELLOWERING_H
#include "MCTargetDesc/MipsABIInfo.h"
#include "MCTargetDesc/MipsBaseInfo.h"
#include "MCTargetDesc/MipsMCTargetDesc.h"
#include "Mips.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/ISDOpcodes.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/MachineValueType.h"
#include "llvm/Target/TargetMachine.h"
#include <algorithm>
#include <cassert>
#include <deque>
#include <string>
#include <utility>
#include <vector>
namespace llvm {
class Argument;
class CCState;
class CCValAssign;
class FastISel;
class FunctionLoweringInfo;
class MachineBasicBlock;
class MachineFrameInfo;
class MachineInstr;
class MipsCCState;
class MipsFunctionInfo;
class MipsSubtarget;
class MipsTargetMachine;
class TargetLibraryInfo;
class TargetRegisterClass;
namespace MipsISD {
enum NodeType : unsigned {
// Start the numbering from where ISD NodeType finishes.
FIRST_NUMBER = ISD::BUILTIN_OP_END,
// Jump and link (call)
JmpLink,
// Tail call
TailCall,
// Get the Highest (63-48) 16 bits from a 64-bit immediate
Highest,
// Get the Higher (47-32) 16 bits from a 64-bit immediate
Higher,
// Get the High 16 bits from a 32/64-bit immediate
// No relation with Mips Hi register
Hi,
// Get the Lower 16 bits from a 32/64-bit immediate
// No relation with Mips Lo register
Lo,
// Get the High 16 bits from a 32 bit immediate for accessing the GOT.
GotHi,
// Get the High 16 bits from a 32-bit immediate for accessing TLS.
TlsHi,
// Handle gp_rel (small data/bss sections) relocation.
GPRel,
// Thread Pointer
ThreadPointer,
// Vector Floating Point Multiply and Subtract
FMS,
// Floating Point Branch Conditional
FPBrcond,
// Floating Point Compare
FPCmp,
// Floating point select
FSELECT,
// Node used to generate an MTC1 i32 to f64 instruction
MTC1_D64,
// Floating Point Conditional Moves
CMovFP_T,
CMovFP_F,
// FP-to-int truncation node.
TruncIntFP,
// Return
Ret,
// Interrupt, exception, error trap Return
ERet,
// Software Exception Return.
EH_RETURN,
// Node used to extract integer from accumulator.
MFHI,
MFLO,
// Node used to insert integers to accumulator.
MTLOHI,
// Mult nodes.
Mult,
Multu,
// MAdd/Sub nodes
MAdd,
MAddu,
MSub,
MSubu,
// DivRem(u)
DivRem,
DivRemU,
DivRem16,
DivRemU16,
BuildPairF64,
ExtractElementF64,
Wrapper,
DynAlloc,
Sync,
Ext,
Ins,
CIns,
// EXTR.W instrinsic nodes.
EXTP,
EXTPDP,
EXTR_S_H,
EXTR_W,
EXTR_R_W,
EXTR_RS_W,
SHILO,
MTHLIP,
// DPA.W intrinsic nodes.
MULSAQ_S_W_PH,
MAQ_S_W_PHL,
MAQ_S_W_PHR,
MAQ_SA_W_PHL,
MAQ_SA_W_PHR,
DPAU_H_QBL,
DPAU_H_QBR,
DPSU_H_QBL,
DPSU_H_QBR,
DPAQ_S_W_PH,
DPSQ_S_W_PH,
DPAQ_SA_L_W,
DPSQ_SA_L_W,
DPA_W_PH,
DPS_W_PH,
DPAQX_S_W_PH,
DPAQX_SA_W_PH,
DPAX_W_PH,
DPSX_W_PH,
DPSQX_S_W_PH,
DPSQX_SA_W_PH,
MULSA_W_PH,
MULT,
MULTU,
MADD_DSP,
MADDU_DSP,
MSUB_DSP,
MSUBU_DSP,
// DSP shift nodes.
SHLL_DSP,
SHRA_DSP,
SHRL_DSP,
// DSP setcc and select_cc nodes.
SETCC_DSP,
SELECT_CC_DSP,
// Vector comparisons.
// These take a vector and return a boolean.
VALL_ZERO,
VANY_ZERO,
VALL_NONZERO,
VANY_NONZERO,
// These take a vector and return a vector bitmask.
VCEQ,
VCLE_S,
VCLE_U,
VCLT_S,
VCLT_U,
// Vector Shuffle with mask as an operand
VSHF, // Generic shuffle
SHF, // 4-element set shuffle.
ILVEV, // Interleave even elements
ILVOD, // Interleave odd elements
ILVL, // Interleave left elements
ILVR, // Interleave right elements
PCKEV, // Pack even elements
PCKOD, // Pack odd elements
// Vector Lane Copy
INSVE, // Copy element from one vector to another
// Combined (XOR (OR $a, $b), -1)
VNOR,
// Extended vector element extraction
VEXTRACT_SEXT_ELT,
VEXTRACT_ZEXT_ELT,
// Load/Store Left/Right nodes.
LWL = ISD::FIRST_TARGET_MEMORY_OPCODE,
LWR,
SWL,
SWR,
LDL,
LDR,
SDL,
SDR
};
} // ene namespace MipsISD
//===--------------------------------------------------------------------===//
// TargetLowering Implementation
//===--------------------------------------------------------------------===//
class MipsTargetLowering : public TargetLowering {
bool isMicroMips;
public:
explicit MipsTargetLowering(const MipsTargetMachine &TM,
const MipsSubtarget &STI);
static const MipsTargetLowering *create(const MipsTargetMachine &TM,
const MipsSubtarget &STI);
/// createFastISel - This method returns a target specific FastISel object,
/// or null if the target does not support "fast" ISel.
FastISel *createFastISel(FunctionLoweringInfo &funcInfo,
const TargetLibraryInfo *libInfo) const override;
MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override {
return MVT::i32;
}
EVT getTypeForExtReturn(LLVMContext &Context, EVT VT,
ISD::NodeType) const override;
bool isCheapToSpeculateCttz() const override;
bool isCheapToSpeculateCtlz() const override;
bool shouldFoldConstantShiftPairToMask(const SDNode *N,
CombineLevel Level) const override;
/// Return the register type for a given MVT, ensuring vectors are treated
/// as a series of gpr sized integers.
MVT getRegisterTypeForCallingConv(LLVMContext &Context, CallingConv::ID CC,
EVT VT) const override;
/// Return the number of registers for a given MVT, ensuring vectors are
/// treated as a series of gpr sized integers.
unsigned getNumRegistersForCallingConv(LLVMContext &Context,
CallingConv::ID CC,
EVT VT) const override;
/// Break down vectors to the correct number of gpr sized integers.
unsigned getVectorTypeBreakdownForCallingConv(
LLVMContext &Context, CallingConv::ID CC, EVT VT, EVT &IntermediateVT,
unsigned &NumIntermediates, MVT &RegisterVT) const override;
/// Return the correct alignment for the current calling convention.
unsigned getABIAlignmentForCallingConv(Type *ArgTy,
DataLayout DL) const override {
if (ArgTy->isVectorTy())
return std::min(DL.getABITypeAlignment(ArgTy), 8U);
return DL.getABITypeAlignment(ArgTy);
}
ISD::NodeType getExtendForAtomicOps() const override {
return ISD::SIGN_EXTEND;
}
void LowerOperationWrapper(SDNode *N,
SmallVectorImpl<SDValue> &Results,
SelectionDAG &DAG) const override;
/// LowerOperation - Provide custom lowering hooks for some operations.
SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
/// ReplaceNodeResults - Replace the results of node with an illegal result
/// type with new values built out of custom code.
///
void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results,
SelectionDAG &DAG) const override;
/// getTargetNodeName - This method returns the name of a target specific
// DAG node.
const char *getTargetNodeName(unsigned Opcode) const override;
/// getSetCCResultType - get the ISD::SETCC result ValueType
EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
EVT VT) const override;
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
MachineBasicBlock *
EmitInstrWithCustomInserter(MachineInstr &MI,
MachineBasicBlock *MBB) const override;
void AdjustInstrPostInstrSelection(MachineInstr &MI,
SDNode *Node) const override;
void HandleByVal(CCState *, unsigned &, unsigned) const override;
unsigned getRegisterByName(const char* RegName, EVT VT,
SelectionDAG &DAG) const override;
/// If a physical register, this returns the register that receives the
/// exception address on entry to an EH pad.
unsigned
getExceptionPointerRegister(const Constant *PersonalityFn) const override {
return ABI.IsN64() ? Mips::A0_64 : Mips::A0;
}
/// If a physical register, this returns the register that receives the
/// exception typeid on entry to a landing pad.
unsigned
getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
return ABI.IsN64() ? Mips::A1_64 : Mips::A1;
}
/// Returns true if a cast between SrcAS and DestAS is a noop.
bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
// Mips doesn't have any special address spaces so we just reserve
// the first 256 for software use (e.g. OpenCL) and treat casts
// between them as noops.
return SrcAS < 256 && DestAS < 256;
}
bool isJumpTableRelative() const override {
return getTargetMachine().isPositionIndependent();
}
CCAssignFn *CCAssignFnForCall() const;
CCAssignFn *CCAssignFnForReturn() const;
protected:
SDValue getGlobalReg(SelectionDAG &DAG, EVT Ty) const;
// This method creates the following nodes, which are necessary for
// computing a local symbol's address:
//
// (add (load (wrapper $gp, %got(sym)), %lo(sym))
template <class NodeTy>
SDValue getAddrLocal(NodeTy *N, const SDLoc &DL, EVT Ty, SelectionDAG &DAG,
bool IsN32OrN64) const {
unsigned GOTFlag = IsN32OrN64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
SDValue GOT = DAG.getNode(MipsISD::Wrapper, DL, Ty, getGlobalReg(DAG, Ty),
getTargetNode(N, Ty, DAG, GOTFlag));
SDValue Load =
DAG.getLoad(Ty, DL, DAG.getEntryNode(), GOT,
MachinePointerInfo::getGOT(DAG.getMachineFunction()));
unsigned LoFlag = IsN32OrN64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
SDValue Lo = DAG.getNode(MipsISD::Lo, DL, Ty,
getTargetNode(N, Ty, DAG, LoFlag));
return DAG.getNode(ISD::ADD, DL, Ty, Load, Lo);
}
// This method creates the following nodes, which are necessary for
// computing a global symbol's address:
//
// (load (wrapper $gp, %got(sym)))
template <class NodeTy>
SDValue getAddrGlobal(NodeTy *N, const SDLoc &DL, EVT Ty, SelectionDAG &DAG,
unsigned Flag, SDValue Chain,
const MachinePointerInfo &PtrInfo) const {
SDValue Tgt = DAG.getNode(MipsISD::Wrapper, DL, Ty, getGlobalReg(DAG, Ty),
getTargetNode(N, Ty, DAG, Flag));
return DAG.getLoad(Ty, DL, Chain, Tgt, PtrInfo);
}
// This method creates the following nodes, which are necessary for
// computing a global symbol's address in large-GOT mode:
//
// (load (wrapper (add %hi(sym), $gp), %lo(sym)))
template <class NodeTy>
SDValue getAddrGlobalLargeGOT(NodeTy *N, const SDLoc &DL, EVT Ty,
SelectionDAG &DAG, unsigned HiFlag,
unsigned LoFlag, SDValue Chain,
const MachinePointerInfo &PtrInfo) const {
SDValue Hi = DAG.getNode(MipsISD::GotHi, DL, Ty,
getTargetNode(N, Ty, DAG, HiFlag));
Hi = DAG.getNode(ISD::ADD, DL, Ty, Hi, getGlobalReg(DAG, Ty));
SDValue Wrapper = DAG.getNode(MipsISD::Wrapper, DL, Ty, Hi,
getTargetNode(N, Ty, DAG, LoFlag));
return DAG.getLoad(Ty, DL, Chain, Wrapper, PtrInfo);
}
// This method creates the following nodes, which are necessary for
// computing a symbol's address in non-PIC mode:
//
// (add %hi(sym), %lo(sym))
//
// This method covers O32, N32 and N64 in sym32 mode.
template <class NodeTy>
SDValue getAddrNonPIC(NodeTy *N, const SDLoc &DL, EVT Ty,
SelectionDAG &DAG) const {
SDValue Hi = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_HI);
SDValue Lo = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_LO);
return DAG.getNode(ISD::ADD, DL, Ty,
DAG.getNode(MipsISD::Hi, DL, Ty, Hi),
DAG.getNode(MipsISD::Lo, DL, Ty, Lo));
}
// This method creates the following nodes, which are necessary for
// computing a symbol's address in non-PIC mode for N64.
//
// (add (shl (add (shl (add %highest(sym), %higher(sim)), 16), %high(sym)),
// 16), %lo(%sym))
//
// FIXME: This method is not efficent for (micro)MIPS64R6.
template <class NodeTy>
SDValue getAddrNonPICSym64(NodeTy *N, const SDLoc &DL, EVT Ty,
SelectionDAG &DAG) const {
SDValue Hi = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_HI);
SDValue Lo = getTargetNode(N, Ty, DAG, MipsII::MO_ABS_LO);
SDValue Highest =
DAG.getNode(MipsISD::Highest, DL, Ty,
getTargetNode(N, Ty, DAG, MipsII::MO_HIGHEST));
SDValue Higher = getTargetNode(N, Ty, DAG, MipsII::MO_HIGHER);
SDValue HigherPart =
DAG.getNode(ISD::ADD, DL, Ty, Highest,
DAG.getNode(MipsISD::Higher, DL, Ty, Higher));
SDValue Cst = DAG.getConstant(16, DL, MVT::i32);
SDValue Shift = DAG.getNode(ISD::SHL, DL, Ty, HigherPart, Cst);
SDValue Add = DAG.getNode(ISD::ADD, DL, Ty, Shift,
DAG.getNode(MipsISD::Hi, DL, Ty, Hi));
SDValue Shift2 = DAG.getNode(ISD::SHL, DL, Ty, Add, Cst);
return DAG.getNode(ISD::ADD, DL, Ty, Shift2,
DAG.getNode(MipsISD::Lo, DL, Ty, Lo));
}
// This method creates the following nodes, which are necessary for
// computing a symbol's address using gp-relative addressing:
//
// (add $gp, %gp_rel(sym))
template <class NodeTy>
SDValue getAddrGPRel(NodeTy *N, const SDLoc &DL, EVT Ty,
SelectionDAG &DAG, bool IsN64) const {
SDValue GPRel = getTargetNode(N, Ty, DAG, MipsII::MO_GPREL);
return DAG.getNode(
ISD::ADD, DL, Ty,
DAG.getRegister(IsN64 ? Mips::GP_64 : Mips::GP, Ty),
DAG.getNode(MipsISD::GPRel, DL, DAG.getVTList(Ty), GPRel));
}
/// This function fills Ops, which is the list of operands that will later
/// be used when a function call node is created. It also generates
/// copyToReg nodes to set up argument registers.
virtual void
getOpndList(SmallVectorImpl<SDValue> &Ops,
std::deque<std::pair<unsigned, SDValue>> &RegsToPass,
bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
bool IsCallReloc, CallLoweringInfo &CLI, SDValue Callee,
SDValue Chain) const;
protected:
SDValue lowerLOAD(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerSTORE(SDValue Op, SelectionDAG &DAG) const;
// Subtarget Info
const MipsSubtarget &Subtarget;
// Cache the ABI from the TargetMachine, we use it everywhere.
const MipsABIInfo &ABI;
private:
// Create a TargetGlobalAddress node.
SDValue getTargetNode(GlobalAddressSDNode *N, EVT Ty, SelectionDAG &DAG,
unsigned Flag) const;
// Create a TargetExternalSymbol node.
SDValue getTargetNode(ExternalSymbolSDNode *N, EVT Ty, SelectionDAG &DAG,
unsigned Flag) const;
// Create a TargetBlockAddress node.
SDValue getTargetNode(BlockAddressSDNode *N, EVT Ty, SelectionDAG &DAG,
unsigned Flag) const;
// Create a TargetJumpTable node.
SDValue getTargetNode(JumpTableSDNode *N, EVT Ty, SelectionDAG &DAG,
unsigned Flag) const;
// Create a TargetConstantPool node.
SDValue getTargetNode(ConstantPoolSDNode *N, EVT Ty, SelectionDAG &DAG,
unsigned Flag) const;
// Lower Operand helpers
SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::InputArg> &Ins,
const SDLoc &dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals,
TargetLowering::CallLoweringInfo &CLI) const;
// Lower Operand specifics
SDValue lowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerBlockAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerJumpTable(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerSELECT(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerSETCC(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerVASTART(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerVAARG(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerFABS(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerATOMIC_FENCE(SDValue Op, SelectionDAG& DAG) const;
SDValue lowerShiftLeftParts(SDValue Op, SelectionDAG& DAG) const;
SDValue lowerShiftRightParts(SDValue Op, SelectionDAG& DAG,
bool IsSRA) const;
SDValue lowerEH_DWARF_CFA(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) const;
/// isEligibleForTailCallOptimization - Check whether the call is eligible
/// for tail call optimization.
virtual bool
isEligibleForTailCallOptimization(const CCState &CCInfo,
unsigned NextStackOffset,
const MipsFunctionInfo &FI) const = 0;
/// copyByValArg - Copy argument registers which were used to pass a byval
/// argument to the stack. Create a stack frame object for the byval
/// argument.
void copyByValRegs(SDValue Chain, const SDLoc &DL,
std::vector<SDValue> &OutChains, SelectionDAG &DAG,
const ISD::ArgFlagsTy &Flags,
SmallVectorImpl<SDValue> &InVals,
const Argument *FuncArg, unsigned FirstReg,
unsigned LastReg, const CCValAssign &VA,
MipsCCState &State) const;
/// passByValArg - Pass a byval argument in registers or on stack.
void passByValArg(SDValue Chain, const SDLoc &DL,
std::deque<std::pair<unsigned, SDValue>> &RegsToPass,
SmallVectorImpl<SDValue> &MemOpChains, SDValue StackPtr,
MachineFrameInfo &MFI, SelectionDAG &DAG, SDValue Arg,
unsigned FirstReg, unsigned LastReg,
const ISD::ArgFlagsTy &Flags, bool isLittle,
const CCValAssign &VA) const;
/// writeVarArgRegs - Write variable function arguments passed in registers
/// to the stack. Also create a stack frame object for the first variable
/// argument.
void writeVarArgRegs(std::vector<SDValue> &OutChains, SDValue Chain,
const SDLoc &DL, SelectionDAG &DAG,
CCState &State) const;
SDValue
LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::InputArg> &Ins,
const SDLoc &dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const override;
SDValue passArgOnStack(SDValue StackPtr, unsigned Offset, SDValue Chain,
SDValue Arg, const SDLoc &DL, bool IsTailCall,
SelectionDAG &DAG) const;
SDValue LowerCall(TargetLowering::CallLoweringInfo &CLI,
SmallVectorImpl<SDValue> &InVals) const override;
bool CanLowerReturn(CallingConv::ID CallConv, MachineFunction &MF,
bool isVarArg,
const SmallVectorImpl<ISD::OutputArg> &Outs,
LLVMContext &Context) const override;
SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals,
const SDLoc &dl, SelectionDAG &DAG) const override;
SDValue LowerInterruptReturn(SmallVectorImpl<SDValue> &RetOps,
const SDLoc &DL, SelectionDAG &DAG) const;
bool shouldSignExtendTypeInLibCall(EVT Type, bool IsSigned) const override;
// Inline asm support
ConstraintType getConstraintType(StringRef Constraint) const override;
/// Examine constraint string and operand type and determine a weight value.
/// The operand object must already have been set up with the operand type.
ConstraintWeight getSingleConstraintMatchWeight(
AsmOperandInfo &info, const char *constraint) const override;
/// This function parses registers that appear in inline-asm constraints.
/// It returns pair (0, 0) on failure.
std::pair<unsigned, const TargetRegisterClass *>
parseRegForInlineAsmConstraint(StringRef C, MVT VT) const;
std::pair<unsigned, const TargetRegisterClass *>
getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI,
StringRef Constraint, MVT VT) const override;
/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
/// vector. If it is invalid, don't add anything to Ops. If hasMemory is
/// true it means one of the asm constraint of the inline asm instruction
/// being processed is 'm'.
void LowerAsmOperandForConstraint(SDValue Op,
std::string &Constraint,
std::vector<SDValue> &Ops,
SelectionDAG &DAG) const override;
unsigned
getInlineAsmMemConstraint(StringRef ConstraintCode) const override {
if (ConstraintCode == "R")
return InlineAsm::Constraint_R;
else if (ConstraintCode == "ZC")
return InlineAsm::Constraint_ZC;
return TargetLowering::getInlineAsmMemConstraint(ConstraintCode);
}
bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM,
Type *Ty, unsigned AS,
Instruction *I = nullptr) const override;
bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override;
EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
unsigned SrcAlign,
bool IsMemset, bool ZeroMemset,
bool MemcpyStrSrc,
const AttributeList &FuncAttributes) const override;
/// isFPImmLegal - Returns true if the target can instruction select the
/// specified FP immediate natively. If false, the legalizer will
/// materialize the FP immediate as a load from a constant pool.
bool isFPImmLegal(const APFloat &Imm, EVT VT,
bool ForCodeSize) const override;
unsigned getJumpTableEncoding() const override;
bool useSoftFloat() const override;
bool shouldInsertFencesForAtomic(const Instruction *I) const override {
return true;
}
/// Emit a sign-extension using sll/sra, seb, or seh appropriately.
MachineBasicBlock *emitSignExtendToI32InReg(MachineInstr &MI,
MachineBasicBlock *BB,
unsigned Size, unsigned DstReg,
unsigned SrcRec) const;
MachineBasicBlock *emitAtomicBinary(MachineInstr &MI,
MachineBasicBlock *BB) const;
MachineBasicBlock *emitAtomicBinaryPartword(MachineInstr &MI,
MachineBasicBlock *BB,
unsigned Size) const;
MachineBasicBlock *emitAtomicCmpSwap(MachineInstr &MI,
MachineBasicBlock *BB) const;
MachineBasicBlock *emitAtomicCmpSwapPartword(MachineInstr &MI,
MachineBasicBlock *BB,
unsigned Size) const;
MachineBasicBlock *emitSEL_D(MachineInstr &MI, MachineBasicBlock *BB) const;
MachineBasicBlock *emitPseudoSELECT(MachineInstr &MI, MachineBasicBlock *BB,
bool isFPCmp, unsigned Opc) const;
MachineBasicBlock *emitPseudoD_SELECT(MachineInstr &MI,
MachineBasicBlock *BB) const;
};
/// Create MipsTargetLowering objects.
const MipsTargetLowering *
createMips16TargetLowering(const MipsTargetMachine &TM,
const MipsSubtarget &STI);
const MipsTargetLowering *
createMipsSETargetLowering(const MipsTargetMachine &TM,
const MipsSubtarget &STI);
namespace Mips {
FastISel *createFastISel(FunctionLoweringInfo &funcInfo,
const TargetLibraryInfo *libInfo);
} // end namespace Mips
} // end namespace llvm
#endif // LLVM_LIB_TARGET_MIPS_MIPSISELLOWERING_H
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