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//===-- AMDGPUISelLowering.h - AMDGPU Lowering Interface --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// \file
/// \brief Interface definition of the TargetLowering class that is common
/// to all AMD GPUs.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_R600_AMDGPUISELLOWERING_H
#define LLVM_LIB_TARGET_R600_AMDGPUISELLOWERING_H
#include "llvm/Target/TargetLowering.h"
namespace llvm {
class AMDGPUMachineFunction;
class AMDGPUSubtarget;
class MachineRegisterInfo;
class AMDGPUTargetLowering : public TargetLowering {
protected:
const AMDGPUSubtarget *Subtarget;
private:
SDValue LowerConstantInitializer(const Constant* Init, const GlobalValue *GV,
const SDValue &InitPtr,
SDValue Chain,
SelectionDAG &DAG) const;
SDValue LowerFrameIndex(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
/// \brief Lower vector stores by merging the vector elements into an integer
/// of the same bitwidth.
SDValue MergeVectorStore(const SDValue &Op, SelectionDAG &DAG) const;
/// \brief Split a vector store into multiple scalar stores.
/// \returns The resulting chain.
SDValue LowerFREM(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFCEIL(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFTRUNC(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFRINT(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFNEARBYINT(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFROUND32(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFROUND64(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFROUND(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFFLOOR(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerINT_TO_FP64(SDValue Op, SelectionDAG &DAG, bool Signed) const;
SDValue LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFP64_TO_INT(SDValue Op, SelectionDAG &DAG, bool Signed) const;
SDValue LowerFP_TO_UINT(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const;
SDValue performStoreCombine(SDNode *N, DAGCombinerInfo &DCI) const;
SDValue performShlCombine(SDNode *N, DAGCombinerInfo &DCI) const;
SDValue performMulCombine(SDNode *N, DAGCombinerInfo &DCI) const;
protected:
static EVT getEquivalentMemType(LLVMContext &Context, EVT VT);
static EVT getEquivalentLoadRegType(LLVMContext &Context, EVT VT);
virtual SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
SelectionDAG &DAG) const;
/// \brief Split a vector load into a scalar load of each component.
SDValue ScalarizeVectorLoad(SDValue Op, SelectionDAG &DAG) const;
/// \brief Split a vector load into 2 loads of half the vector.
SDValue SplitVectorLoad(SDValue Op, SelectionDAG &DAG) const;
/// \brief Split a vector store into a scalar store of each component.
SDValue ScalarizeVectorStore(SDValue Op, SelectionDAG &DAG) const;
/// \brief Split a vector store into 2 stores of half the vector.
SDValue SplitVectorStore(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSDIVREM(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerUDIVREM(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerDIVREM24(SDValue Op, SelectionDAG &DAG, bool sign) const;
void LowerUDIVREM64(SDValue Op, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &Results) const;
bool isHWTrueValue(SDValue Op) const;
bool isHWFalseValue(SDValue Op) const;
/// The SelectionDAGBuilder will automatically promote function arguments
/// with illegal types. However, this does not work for the AMDGPU targets
/// since the function arguments are stored in memory as these illegal types.
/// In order to handle this properly we need to get the origianl types sizes
/// from the LLVM IR Function and fixup the ISD:InputArg values before
/// passing them to AnalyzeFormalArguments()
void getOriginalFunctionArgs(SelectionDAG &DAG,
const Function *F,
const SmallVectorImpl<ISD::InputArg> &Ins,
SmallVectorImpl<ISD::InputArg> &OrigIns) const;
void AnalyzeFormalArguments(CCState &State,
const SmallVectorImpl<ISD::InputArg> &Ins) const;
public:
AMDGPUTargetLowering(TargetMachine &TM, const AMDGPUSubtarget &STI);
bool isFAbsFree(EVT VT) const override;
bool isFNegFree(EVT VT) const override;
bool isTruncateFree(EVT Src, EVT Dest) const override;
bool isTruncateFree(Type *Src, Type *Dest) const override;
bool isZExtFree(Type *Src, Type *Dest) const override;
bool isZExtFree(EVT Src, EVT Dest) const override;
bool isZExtFree(SDValue Val, EVT VT2) const override;
bool isNarrowingProfitable(EVT VT1, EVT VT2) const override;
MVT getVectorIdxTy(const DataLayout &) const override;
bool isSelectSupported(SelectSupportKind) const override;
bool isFPImmLegal(const APFloat &Imm, EVT VT) const override;
bool ShouldShrinkFPConstant(EVT VT) const override;
bool shouldReduceLoadWidth(SDNode *Load,
ISD::LoadExtType ExtType,
EVT ExtVT) const override;
bool isLoadBitCastBeneficial(EVT, EVT) const override;
bool storeOfVectorConstantIsCheap(EVT MemVT,
unsigned NumElem,
unsigned AS) const override;
bool isCheapToSpeculateCttz() const override;
bool isCheapToSpeculateCtlz() const override;
SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv,
bool isVarArg,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals,
SDLoc DL, SelectionDAG &DAG) const override;
SDValue LowerCall(CallLoweringInfo &CLI,
SmallVectorImpl<SDValue> &InVals) const override;
SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
void ReplaceNodeResults(SDNode * N,
SmallVectorImpl<SDValue> &Results,
SelectionDAG &DAG) const override;
SDValue LowerIntrinsicIABS(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerIntrinsicLRP(SDValue Op, SelectionDAG &DAG) const;
SDValue CombineFMinMaxLegacy(SDLoc DL,
EVT VT,
SDValue LHS,
SDValue RHS,
SDValue True,
SDValue False,
SDValue CC,
DAGCombinerInfo &DCI) const;
SDValue CombineIMinMax(SDLoc DL,
EVT VT,
SDValue LHS,
SDValue RHS,
SDValue True,
SDValue False,
SDValue CC,
SelectionDAG &DAG) const;
const char* getTargetNodeName(unsigned Opcode) const override;
SDValue getRsqrtEstimate(SDValue Operand,
DAGCombinerInfo &DCI,
unsigned &RefinementSteps,
bool &UseOneConstNR) const override;
SDValue getRecipEstimate(SDValue Operand,
DAGCombinerInfo &DCI,
unsigned &RefinementSteps) const override;
virtual SDNode *PostISelFolding(MachineSDNode *N,
SelectionDAG &DAG) const {
return N;
}
/// \brief Determine which of the bits specified in \p Mask are known to be
/// either zero or one and return them in the \p KnownZero and \p KnownOne
/// bitsets.
void computeKnownBitsForTargetNode(const SDValue Op,
APInt &KnownZero,
APInt &KnownOne,
const SelectionDAG &DAG,
unsigned Depth = 0) const override;
unsigned ComputeNumSignBitsForTargetNode(SDValue Op, const SelectionDAG &DAG,
unsigned Depth = 0) const override;
/// \brief Helper function that adds Reg to the LiveIn list of the DAG's
/// MachineFunction.
///
/// \returns a RegisterSDNode representing Reg.
virtual SDValue CreateLiveInRegister(SelectionDAG &DAG,
const TargetRegisterClass *RC,
unsigned Reg, EVT VT) const;
enum ImplicitParameter {
GRID_DIM,
GRID_OFFSET
};
/// \brief Helper function that returns the byte offset of the given
/// type of implicit parameter.
unsigned getImplicitParameterOffset(const AMDGPUMachineFunction *MFI,
const ImplicitParameter Param) const;
};
namespace AMDGPUISD {
enum NodeType : unsigned {
// AMDIL ISD Opcodes
FIRST_NUMBER = ISD::BUILTIN_OP_END,
CALL, // Function call based on a single integer
UMUL, // 32bit unsigned multiplication
RET_FLAG,
BRANCH_COND,
// End AMDIL ISD Opcodes
DWORDADDR,
FRACT,
CLAMP,
// SIN_HW, COS_HW - f32 for SI, 1 ULP max error, valid from -100 pi to 100 pi.
// Denormals handled on some parts.
COS_HW,
SIN_HW,
FMAX_LEGACY,
FMIN_LEGACY,
FMAX3,
SMAX3,
UMAX3,
FMIN3,
SMIN3,
UMIN3,
URECIP,
DIV_SCALE,
DIV_FMAS,
DIV_FIXUP,
TRIG_PREOP, // 1 ULP max error for f64
// RCP, RSQ - For f32, 1 ULP max error, no denormal handling.
// For f64, max error 2^29 ULP, handles denormals.
RCP,
RSQ,
RSQ_LEGACY,
RSQ_CLAMPED,
LDEXP,
FP_CLASS,
DOT4,
CARRY,
BORROW,
BFE_U32, // Extract range of bits with zero extension to 32-bits.
BFE_I32, // Extract range of bits with sign extension to 32-bits.
BFI, // (src0 & src1) | (~src0 & src2)
BFM, // Insert a range of bits into a 32-bit word.
BREV, // Reverse bits.
MUL_U24,
MUL_I24,
MAD_U24,
MAD_I24,
TEXTURE_FETCH,
EXPORT,
CONST_ADDRESS,
REGISTER_LOAD,
REGISTER_STORE,
LOAD_INPUT,
SAMPLE,
SAMPLEB,
SAMPLED,
SAMPLEL,
// These cvt_f32_ubyte* nodes need to remain consecutive and in order.
CVT_F32_UBYTE0,
CVT_F32_UBYTE1,
CVT_F32_UBYTE2,
CVT_F32_UBYTE3,
/// This node is for VLIW targets and it is used to represent a vector
/// that is stored in consecutive registers with the same channel.
/// For example:
/// |X |Y|Z|W|
/// T0|v.x| | | |
/// T1|v.y| | | |
/// T2|v.z| | | |
/// T3|v.w| | | |
BUILD_VERTICAL_VECTOR,
/// Pointer to the start of the shader's constant data.
CONST_DATA_PTR,
SENDMSG,
INTERP_MOV,
INTERP_P1,
INTERP_P2,
FIRST_MEM_OPCODE_NUMBER = ISD::FIRST_TARGET_MEMORY_OPCODE,
STORE_MSKOR,
LOAD_CONSTANT,
TBUFFER_STORE_FORMAT,
LAST_AMDGPU_ISD_NUMBER
};
} // End namespace AMDGPUISD
} // End namespace llvm
#endif
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