| //===-- SparcISelLowering.h - Sparc 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 Sparc uses to lower LLVM code into a |
| // selection DAG. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_SPARC_SPARCISELLOWERING_H |
| #define LLVM_LIB_TARGET_SPARC_SPARCISELLOWERING_H |
| |
| #include "Sparc.h" |
| #include "llvm/CodeGen/TargetLowering.h" |
| |
| namespace llvm { |
| class SparcSubtarget; |
| |
| namespace SPISD { |
| enum NodeType : unsigned { |
| FIRST_NUMBER = ISD::BUILTIN_OP_END, |
| CMPICC, // Compare two GPR operands, set icc+xcc. |
| CMPFCC, // Compare two FP operands, set fcc. |
| BRICC, // Branch to dest on icc condition |
| BRXCC, // Branch to dest on xcc condition (64-bit only). |
| BRFCC, // Branch to dest on fcc condition |
| SELECT_ICC, // Select between two values using the current ICC flags. |
| SELECT_XCC, // Select between two values using the current XCC flags. |
| SELECT_FCC, // Select between two values using the current FCC flags. |
| |
| Hi, Lo, // Hi/Lo operations, typically on a global address. |
| |
| FTOI, // FP to Int within a FP register. |
| ITOF, // Int to FP within a FP register. |
| FTOX, // FP to Int64 within a FP register. |
| XTOF, // Int64 to FP within a FP register. |
| |
| CALL, // A call instruction. |
| RET_FLAG, // Return with a flag operand. |
| GLOBAL_BASE_REG, // Global base reg for PIC. |
| FLUSHW, // FLUSH register windows to stack. |
| |
| TLS_ADD, // For Thread Local Storage (TLS). |
| TLS_LD, |
| TLS_CALL |
| }; |
| } |
| |
| class SparcTargetLowering : public TargetLowering { |
| const SparcSubtarget *Subtarget; |
| public: |
| SparcTargetLowering(const TargetMachine &TM, const SparcSubtarget &STI); |
| SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; |
| |
| bool useSoftFloat() const override; |
| |
| /// computeKnownBitsForTargetNode - Determine which of the bits specified |
| /// in Mask are known to be either zero or one and return them in the |
| /// KnownZero/KnownOne bitsets. |
| void computeKnownBitsForTargetNode(const SDValue Op, |
| KnownBits &Known, |
| const APInt &DemandedElts, |
| const SelectionDAG &DAG, |
| unsigned Depth = 0) const override; |
| |
| MachineBasicBlock * |
| EmitInstrWithCustomInserter(MachineInstr &MI, |
| MachineBasicBlock *MBB) const override; |
| |
| const char *getTargetNodeName(unsigned Opcode) const override; |
| |
| ConstraintType getConstraintType(StringRef Constraint) const override; |
| ConstraintWeight |
| getSingleConstraintMatchWeight(AsmOperandInfo &info, |
| const char *constraint) const override; |
| void LowerAsmOperandForConstraint(SDValue Op, |
| std::string &Constraint, |
| std::vector<SDValue> &Ops, |
| SelectionDAG &DAG) const override; |
| |
| unsigned |
| getInlineAsmMemConstraint(StringRef ConstraintCode) const override { |
| if (ConstraintCode == "o") |
| return InlineAsm::Constraint_o; |
| return TargetLowering::getInlineAsmMemConstraint(ConstraintCode); |
| } |
| |
| std::pair<unsigned, const TargetRegisterClass *> |
| getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI, |
| StringRef Constraint, MVT VT) const override; |
| |
| bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override; |
| MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override { |
| return MVT::i32; |
| } |
| |
| Register getRegisterByName(const char* RegName, LLT VT, |
| const MachineFunction &MF) 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 SP::I0; |
| } |
| |
| /// 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 SP::I1; |
| } |
| |
| /// Override to support customized stack guard loading. |
| bool useLoadStackGuardNode() const override; |
| void insertSSPDeclarations(Module &M) const override; |
| |
| /// getSetCCResultType - Return the ISD::SETCC ValueType |
| EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context, |
| EVT VT) const override; |
| |
| 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 LowerFormalArguments_32(SDValue Chain, CallingConv::ID CallConv, |
| bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| const SDLoc &dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| SDValue LowerFormalArguments_64(SDValue Chain, CallingConv::ID CallConv, |
| bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| const SDLoc &dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| SDValue |
| LowerCall(TargetLowering::CallLoweringInfo &CLI, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| SDValue LowerCall_32(TargetLowering::CallLoweringInfo &CLI, |
| SmallVectorImpl<SDValue> &InVals) const; |
| SDValue LowerCall_64(TargetLowering::CallLoweringInfo &CLI, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| 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 LowerReturn_32(SDValue Chain, CallingConv::ID CallConv, |
| bool IsVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SDLoc &DL, SelectionDAG &DAG) const; |
| SDValue LowerReturn_64(SDValue Chain, CallingConv::ID CallConv, |
| bool IsVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SDLoc &DL, SelectionDAG &DAG) const; |
| |
| SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue withTargetFlags(SDValue Op, unsigned TF, SelectionDAG &DAG) const; |
| SDValue makeHiLoPair(SDValue Op, unsigned HiTF, unsigned LoTF, |
| SelectionDAG &DAG) const; |
| SDValue makeAddress(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerF128_LibCallArg(SDValue Chain, ArgListTy &Args, SDValue Arg, |
| const SDLoc &DL, SelectionDAG &DAG) const; |
| SDValue LowerF128Op(SDValue Op, SelectionDAG &DAG, |
| const char *LibFuncName, |
| unsigned numArgs) const; |
| SDValue LowerF128Compare(SDValue LHS, SDValue RHS, unsigned &SPCC, |
| const SDLoc &DL, SelectionDAG &DAG) const; |
| |
| SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue PerformBITCASTCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| |
| SDValue bitcastConstantFPToInt(ConstantFPSDNode *C, const SDLoc &DL, |
| SelectionDAG &DAG) const; |
| |
| SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override; |
| |
| bool ShouldShrinkFPConstant(EVT VT) const override { |
| // Do not shrink FP constpool if VT == MVT::f128. |
| // (ldd, call _Q_fdtoq) is more expensive than two ldds. |
| return VT != MVT::f128; |
| } |
| |
| bool shouldInsertFencesForAtomic(const Instruction *I) const override { |
| // FIXME: We insert fences for each atomics and generate |
| // sub-optimal code for PSO/TSO. (Approximately nobody uses any |
| // mode but TSO, which makes this even more silly) |
| return true; |
| } |
| |
| AtomicExpansionKind shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const override; |
| |
| void ReplaceNodeResults(SDNode *N, |
| SmallVectorImpl<SDValue>& Results, |
| SelectionDAG &DAG) const override; |
| |
| MachineBasicBlock *expandSelectCC(MachineInstr &MI, MachineBasicBlock *BB, |
| unsigned BROpcode) const; |
| }; |
| } // end namespace llvm |
| |
| #endif // SPARC_ISELLOWERING_H |
