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303 lines
11 KiB
C++
303 lines
11 KiB
C++
//===-- AMDGPUISelLowering.h - AMDGPU Lowering Interface --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// \brief Interface definition of the TargetLowering class that is common
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/// to all AMD GPUs.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_R600_AMDGPUISELLOWERING_H
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#define LLVM_LIB_TARGET_R600_AMDGPUISELLOWERING_H
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#include "llvm/Target/TargetLowering.h"
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namespace llvm {
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class AMDGPUMachineFunction;
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class AMDGPUSubtarget;
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class MachineRegisterInfo;
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class AMDGPUTargetLowering : public TargetLowering {
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protected:
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const AMDGPUSubtarget *Subtarget;
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private:
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SDValue LowerConstantInitializer(const Constant* Init, const GlobalValue *GV,
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const SDValue &InitPtr,
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SDValue Chain,
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SelectionDAG &DAG) const;
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SDValue LowerFrameIndex(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
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/// \brief Lower vector stores by merging the vector elements into an integer
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/// of the same bitwidth.
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SDValue MergeVectorStore(const SDValue &Op, SelectionDAG &DAG) const;
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/// \brief Split a vector store into multiple scalar stores.
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/// \returns The resulting chain.
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SDValue LowerFREM(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFCEIL(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFTRUNC(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFRINT(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFNEARBYINT(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFROUND32(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFROUND64(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFROUND(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFFLOOR(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerINT_TO_FP64(SDValue Op, SelectionDAG &DAG, bool Signed) const;
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SDValue LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFP64_TO_INT(SDValue Op, SelectionDAG &DAG, bool Signed) const;
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SDValue LowerFP_TO_UINT(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const;
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SDValue performStoreCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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SDValue performMulCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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protected:
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static EVT getEquivalentMemType(LLVMContext &Context, EVT VT);
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static EVT getEquivalentLoadRegType(LLVMContext &Context, EVT VT);
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virtual SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
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SelectionDAG &DAG) const;
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/// \brief Split a vector load into a scalar load of each component.
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SDValue ScalarizeVectorLoad(SDValue Op, SelectionDAG &DAG) const;
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/// \brief Split a vector load into 2 loads of half the vector.
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SDValue SplitVectorLoad(SDValue Op, SelectionDAG &DAG) const;
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/// \brief Split a vector store into a scalar store of each component.
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SDValue ScalarizeVectorStore(SDValue Op, SelectionDAG &DAG) const;
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/// \brief Split a vector store into 2 stores of half the vector.
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SDValue SplitVectorStore(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerSDIVREM(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerUDIVREM(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerDIVREM24(SDValue Op, SelectionDAG &DAG, bool sign) const;
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void LowerUDIVREM64(SDValue Op, SelectionDAG &DAG,
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SmallVectorImpl<SDValue> &Results) const;
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bool isHWTrueValue(SDValue Op) const;
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bool isHWFalseValue(SDValue Op) const;
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/// The SelectionDAGBuilder will automatically promote function arguments
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/// with illegal types. However, this does not work for the AMDGPU targets
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/// since the function arguments are stored in memory as these illegal types.
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/// In order to handle this properly we need to get the origianl types sizes
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/// from the LLVM IR Function and fixup the ISD:InputArg values before
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/// passing them to AnalyzeFormalArguments()
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void getOriginalFunctionArgs(SelectionDAG &DAG,
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const Function *F,
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const SmallVectorImpl<ISD::InputArg> &Ins,
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SmallVectorImpl<ISD::InputArg> &OrigIns) const;
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void AnalyzeFormalArguments(CCState &State,
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const SmallVectorImpl<ISD::InputArg> &Ins) const;
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public:
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AMDGPUTargetLowering(TargetMachine &TM, const AMDGPUSubtarget &STI);
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bool isFAbsFree(EVT VT) const override;
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bool isFNegFree(EVT VT) const override;
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bool isTruncateFree(EVT Src, EVT Dest) const override;
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bool isTruncateFree(Type *Src, Type *Dest) const override;
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bool isZExtFree(Type *Src, Type *Dest) const override;
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bool isZExtFree(EVT Src, EVT Dest) const override;
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bool isZExtFree(SDValue Val, EVT VT2) const override;
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bool isNarrowingProfitable(EVT VT1, EVT VT2) const override;
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MVT getVectorIdxTy() const override;
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bool isSelectSupported(SelectSupportKind) const override;
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bool isFPImmLegal(const APFloat &Imm, EVT VT) const override;
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bool ShouldShrinkFPConstant(EVT VT) const override;
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bool shouldReduceLoadWidth(SDNode *Load,
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ISD::LoadExtType ExtType,
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EVT ExtVT) const override;
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bool isLoadBitCastBeneficial(EVT, EVT) const override;
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bool isCheapToSpeculateCttz() const override;
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bool isCheapToSpeculateCtlz() const override;
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SDValue LowerReturn(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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SDLoc DL, SelectionDAG &DAG) const override;
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SDValue LowerCall(CallLoweringInfo &CLI,
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SmallVectorImpl<SDValue> &InVals) const override;
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SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
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SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) 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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SDValue LowerIntrinsicIABS(SDValue Op, SelectionDAG &DAG) const;
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SDValue LowerIntrinsicLRP(SDValue Op, SelectionDAG &DAG) const;
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SDValue CombineFMinMaxLegacy(SDLoc DL,
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EVT VT,
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SDValue LHS,
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SDValue RHS,
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SDValue True,
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SDValue False,
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SDValue CC,
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DAGCombinerInfo &DCI) const;
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SDValue CombineIMinMax(SDLoc DL,
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EVT VT,
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SDValue LHS,
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SDValue RHS,
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SDValue True,
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SDValue False,
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SDValue CC,
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SelectionDAG &DAG) const;
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const char* getTargetNodeName(unsigned Opcode) const override;
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SDValue getRsqrtEstimate(SDValue Operand,
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DAGCombinerInfo &DCI,
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unsigned &RefinementSteps,
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bool &UseOneConstNR) const override;
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SDValue getRecipEstimate(SDValue Operand,
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DAGCombinerInfo &DCI,
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unsigned &RefinementSteps) const override;
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virtual SDNode *PostISelFolding(MachineSDNode *N,
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SelectionDAG &DAG) const {
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return N;
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}
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/// \brief Determine which of the bits specified in \p Mask are known to be
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/// either zero or one and return them in the \p KnownZero and \p KnownOne
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/// bitsets.
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void computeKnownBitsForTargetNode(const SDValue Op,
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APInt &KnownZero,
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APInt &KnownOne,
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const SelectionDAG &DAG,
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unsigned Depth = 0) const override;
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unsigned ComputeNumSignBitsForTargetNode(SDValue Op, const SelectionDAG &DAG,
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unsigned Depth = 0) const override;
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/// \brief Helper function that adds Reg to the LiveIn list of the DAG's
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/// MachineFunction.
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///
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/// \returns a RegisterSDNode representing Reg.
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virtual SDValue CreateLiveInRegister(SelectionDAG &DAG,
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const TargetRegisterClass *RC,
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unsigned Reg, EVT VT) const;
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};
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namespace AMDGPUISD {
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enum {
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// AMDIL ISD Opcodes
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FIRST_NUMBER = ISD::BUILTIN_OP_END,
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CALL, // Function call based on a single integer
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UMUL, // 32bit unsigned multiplication
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RET_FLAG,
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BRANCH_COND,
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// End AMDIL ISD Opcodes
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DWORDADDR,
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FRACT,
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CLAMP,
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MAD, // Multiply + add with same result as the separate operations.
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// SIN_HW, COS_HW - f32 for SI, 1 ULP max error, valid from -100 pi to 100 pi.
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// Denormals handled on some parts.
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COS_HW,
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SIN_HW,
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FMAX_LEGACY,
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SMAX,
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UMAX,
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FMIN_LEGACY,
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SMIN,
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UMIN,
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FMAX3,
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SMAX3,
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UMAX3,
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FMIN3,
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SMIN3,
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UMIN3,
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URECIP,
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DIV_SCALE,
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DIV_FMAS,
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DIV_FIXUP,
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TRIG_PREOP, // 1 ULP max error for f64
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// RCP, RSQ - For f32, 1 ULP max error, no denormal handling.
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// For f64, max error 2^29 ULP, handles denormals.
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RCP,
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RSQ,
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RSQ_LEGACY,
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RSQ_CLAMPED,
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LDEXP,
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FP_CLASS,
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DOT4,
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BFE_U32, // Extract range of bits with zero extension to 32-bits.
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BFE_I32, // Extract range of bits with sign extension to 32-bits.
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BFI, // (src0 & src1) | (~src0 & src2)
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BFM, // Insert a range of bits into a 32-bit word.
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BREV, // Reverse bits.
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MUL_U24,
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MUL_I24,
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MAD_U24,
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MAD_I24,
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TEXTURE_FETCH,
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EXPORT,
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CONST_ADDRESS,
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REGISTER_LOAD,
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REGISTER_STORE,
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LOAD_INPUT,
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SAMPLE,
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SAMPLEB,
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SAMPLED,
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SAMPLEL,
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// These cvt_f32_ubyte* nodes need to remain consecutive and in order.
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CVT_F32_UBYTE0,
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CVT_F32_UBYTE1,
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CVT_F32_UBYTE2,
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CVT_F32_UBYTE3,
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/// This node is for VLIW targets and it is used to represent a vector
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/// that is stored in consecutive registers with the same channel.
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/// For example:
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/// |X |Y|Z|W|
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/// T0|v.x| | | |
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/// T1|v.y| | | |
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/// T2|v.z| | | |
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/// T3|v.w| | | |
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BUILD_VERTICAL_VECTOR,
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/// Pointer to the start of the shader's constant data.
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CONST_DATA_PTR,
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FIRST_MEM_OPCODE_NUMBER = ISD::FIRST_TARGET_MEMORY_OPCODE,
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STORE_MSKOR,
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LOAD_CONSTANT,
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TBUFFER_STORE_FORMAT,
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LAST_AMDGPU_ISD_NUMBER
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};
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} // End namespace AMDGPUISD
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} // End namespace llvm
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#endif
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