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ba38e6c2ae
This can be done only with moves which theoretically will optimize better later. Although this transform increases the instruction count, it should be code size / cycle count neutral in the worst VALU case. It also seems to slightly improve a couple of testcases due to other DAG combines this exposes. This is probably slightly worse for the SALU case, so it might be better to handle this during moveToVALU, although then you lose some simplifications like the load width reducing in the simple testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242177 91177308-0d34-0410-b5e6-96231b3b80d8
319 lines
12 KiB
C++
319 lines
12 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 performShlCombine(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 DataLayout &) 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 storeOfVectorConstantIsCheap(EVT MemVT,
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unsigned NumElem,
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unsigned AS) 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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enum ImplicitParameter {
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GRID_DIM,
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GRID_OFFSET
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};
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/// \brief Helper function that returns the byte offset of the given
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/// type of implicit parameter.
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unsigned getImplicitParameterOffset(const AMDGPUMachineFunction *MFI,
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const ImplicitParameter Param) const;
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};
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namespace AMDGPUISD {
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enum NodeType : unsigned {
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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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// 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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FMIN_LEGACY,
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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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CARRY,
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BORROW,
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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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SENDMSG,
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INTERP_MOV,
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INTERP_P1,
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INTERP_P2,
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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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