207 lines
9.1 KiB
C++
207 lines
9.1 KiB
C++
//===-- SparcISelLowering.h - Sparc DAG Lowering Interface ------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the interfaces that Sparc uses to lower LLVM code into a
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// selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_SPARC_SPARCISELLOWERING_H
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#define LLVM_LIB_TARGET_SPARC_SPARCISELLOWERING_H
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#include "Sparc.h"
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#include "llvm/CodeGen/TargetLowering.h"
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namespace llvm {
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class SparcSubtarget;
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class SparcTargetLowering : public TargetLowering {
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const SparcSubtarget *Subtarget;
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public:
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SparcTargetLowering(const TargetMachine &TM, const SparcSubtarget &STI);
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SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
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bool useSoftFloat() const override;
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/// computeKnownBitsForTargetNode - Determine which of the bits specified
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/// in Mask are known to be either zero or one and return them in the
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/// KnownZero/KnownOne bitsets.
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void computeKnownBitsForTargetNode(const SDValue Op,
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KnownBits &Known,
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const APInt &DemandedElts,
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const SelectionDAG &DAG,
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unsigned Depth = 0) const override;
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MachineBasicBlock *
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EmitInstrWithCustomInserter(MachineInstr &MI,
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MachineBasicBlock *MBB) const override;
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ConstraintType getConstraintType(StringRef Constraint) const override;
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ConstraintWeight
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getSingleConstraintMatchWeight(AsmOperandInfo &info,
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const char *constraint) const override;
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void LowerAsmOperandForConstraint(SDValue Op, StringRef Constraint,
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std::vector<SDValue> &Ops,
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SelectionDAG &DAG) const override;
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std::pair<unsigned, const TargetRegisterClass *>
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getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI,
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StringRef Constraint, MVT VT) const override;
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bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override;
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MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override {
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return MVT::i32;
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}
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Register getRegisterByName(const char* RegName, LLT VT,
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const MachineFunction &MF) const override;
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/// If a physical register, this returns the register that receives the
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/// exception address on entry to an EH pad.
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Register
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getExceptionPointerRegister(const Constant *PersonalityFn) const override {
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return SP::I0;
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}
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/// If a physical register, this returns the register that receives the
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/// exception typeid on entry to a landing pad.
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Register
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getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
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return SP::I1;
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}
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/// Override to support customized stack guard loading.
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bool useLoadStackGuardNode(const Module &M) const override;
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void insertSSPDeclarations(Module &M) const override;
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/// getSetCCResultType - Return the ISD::SETCC ValueType
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EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
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EVT VT) const override;
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SDValue
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LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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const SDLoc &dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals) const override;
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SDValue LowerFormalArguments_32(SDValue Chain, CallingConv::ID CallConv,
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bool isVarArg,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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const SDLoc &dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals) const;
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SDValue LowerFormalArguments_64(SDValue Chain, CallingConv::ID CallConv,
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bool isVarArg,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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const SDLoc &dl, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &InVals) const;
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SDValue
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LowerCall(TargetLowering::CallLoweringInfo &CLI,
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SmallVectorImpl<SDValue> &InVals) const override;
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SDValue LowerCall_32(TargetLowering::CallLoweringInfo &CLI,
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SmallVectorImpl<SDValue> &InVals) const;
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SDValue LowerCall_64(TargetLowering::CallLoweringInfo &CLI,
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SmallVectorImpl<SDValue> &InVals) const;
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bool CanLowerReturn(CallingConv::ID CallConv, MachineFunction &MF,
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bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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LLVMContext &Context, const Type *RetTy) const override;
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SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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const SDLoc &dl, SelectionDAG &DAG) const override;
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SDValue LowerReturn_32(SDValue Chain, CallingConv::ID CallConv,
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bool IsVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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const SDLoc &DL, SelectionDAG &DAG) const;
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SDValue LowerReturn_64(SDValue Chain, CallingConv::ID CallConv,
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bool IsVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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const SDLoc &DL, SelectionDAG &DAG) const;
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SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const;
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SDValue withTargetFlags(SDValue Op, unsigned TF, SelectionDAG &DAG) const;
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SDValue makeHiLoPair(SDValue Op, unsigned HiTF, unsigned LoTF,
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SelectionDAG &DAG) const;
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SDValue makeAddress(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerF128_LibCallArg(SDValue Chain, ArgListTy &Args, SDValue Arg,
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const SDLoc &DL, SelectionDAG &DAG) const;
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SDValue LowerF128Op(SDValue Op, SelectionDAG &DAG,
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const char *LibFuncName,
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unsigned numArgs) const;
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SDValue LowerF128Compare(SDValue LHS, SDValue RHS, unsigned &SPCC,
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const SDLoc &DL, SelectionDAG &DAG) const;
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SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
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SDValue PerformBITCASTCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue bitcastConstantFPToInt(ConstantFPSDNode *C, const SDLoc &DL,
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SelectionDAG &DAG) const;
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SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
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bool IsEligibleForTailCallOptimization(CCState &CCInfo,
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CallLoweringInfo &CLI,
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MachineFunction &MF) const;
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bool ShouldShrinkFPConstant(EVT VT) const override {
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// Do not shrink FP constpool if VT == MVT::f128.
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// (ldd, call _Q_fdtoq) is more expensive than two ldds.
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return VT != MVT::f128;
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}
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bool isFNegFree(EVT VT) const override;
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bool isFPImmLegal(const APFloat &Imm, EVT VT,
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bool ForCodeSize) const override;
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bool isCtlzFast() const override;
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bool isCheapToSpeculateCtlz(Type *Ty) const override {
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return isCtlzFast();
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}
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bool isCheapToSpeculateCttz(Type *Ty) const override;
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bool enableAggressiveFMAFusion(EVT VT) const override { return true; };
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bool isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
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EVT VT) const override;
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bool shouldInsertFencesForAtomic(const Instruction *I) const override {
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// FIXME: We insert fences for each atomics and generate
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// sub-optimal code for PSO/TSO. (Approximately nobody uses any
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// mode but TSO, which makes this even more silly)
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return true;
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}
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AtomicExpansionKind shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const override;
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void ReplaceNodeResults(SDNode *N,
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SmallVectorImpl<SDValue>& Results,
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SelectionDAG &DAG) const override;
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MachineBasicBlock *expandSelectCC(MachineInstr &MI, MachineBasicBlock *BB,
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unsigned BROpcode) const;
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void AdjustInstrPostInstrSelection(MachineInstr &MI,
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SDNode *Node) const override;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_SPARC_SPARCISELLOWERING_H
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