LLVM  9.0.0svn
SIISelLowering.h
Go to the documentation of this file.
1 //===-- SIISelLowering.h - SI DAG Lowering Interface ------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 /// \file
10 /// SI DAG Lowering interface definition
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_AMDGPU_SIISELLOWERING_H
15 #define LLVM_LIB_TARGET_AMDGPU_SIISELLOWERING_H
16 
17 #include "AMDGPUISelLowering.h"
19 #include "SIInstrInfo.h"
20 
21 namespace llvm {
22 
23 class SITargetLowering final : public AMDGPUTargetLowering {
24 private:
25  const GCNSubtarget *Subtarget;
26 
27 public:
29  CallingConv::ID CC,
30  EVT VT) const override;
32  CallingConv::ID CC,
33  EVT VT) const override;
34 
36  LLVMContext &Context, CallingConv::ID CC, EVT VT, EVT &IntermediateVT,
37  unsigned &NumIntermediates, MVT &RegisterVT) const override;
38 
39 private:
40  SDValue lowerKernArgParameterPtr(SelectionDAG &DAG, const SDLoc &SL,
41  SDValue Chain, uint64_t Offset) const;
42  SDValue getImplicitArgPtr(SelectionDAG &DAG, const SDLoc &SL) const;
43  SDValue lowerKernargMemParameter(SelectionDAG &DAG, EVT VT, EVT MemVT,
44  const SDLoc &SL, SDValue Chain,
45  uint64_t Offset, unsigned Align, bool Signed,
46  const ISD::InputArg *Arg = nullptr) const;
47 
48  SDValue lowerStackParameter(SelectionDAG &DAG, CCValAssign &VA,
49  const SDLoc &SL, SDValue Chain,
50  const ISD::InputArg &Arg) const;
51  SDValue getPreloadedValue(SelectionDAG &DAG,
52  const SIMachineFunctionInfo &MFI,
53  EVT VT,
55 
56  SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
57  SelectionDAG &DAG) const override;
58  SDValue lowerImplicitZextParam(SelectionDAG &DAG, SDValue Op,
59  MVT VT, unsigned Offset) const;
60  SDValue lowerImage(SDValue Op, const AMDGPU::ImageDimIntrinsicInfo *Intr,
61  SelectionDAG &DAG) const;
62  SDValue lowerSBuffer(EVT VT, SDLoc DL, SDValue Rsrc, SDValue Offset,
63  SDValue GLC, SelectionDAG &DAG) const;
64 
65  SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
66  SDValue LowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const;
67  SDValue LowerINTRINSIC_VOID(SDValue Op, SelectionDAG &DAG) const;
68 
69  // The raw.tbuffer and struct.tbuffer intrinsics have two offset args: offset
70  // (the offset that is included in bounds checking and swizzling, to be split
71  // between the instruction's voffset and immoffset fields) and soffset (the
72  // offset that is excluded from bounds checking and swizzling, to go in the
73  // instruction's soffset field). This function takes the first kind of
74  // offset and figures out how to split it between voffset and immoffset.
75  std::pair<SDValue, SDValue> splitBufferOffsets(SDValue Offset,
76  SelectionDAG &DAG) const;
77 
78  SDValue widenLoad(LoadSDNode *Ld, DAGCombinerInfo &DCI) const;
79  SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
80  SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
81  SDValue lowerFastUnsafeFDIV(SDValue Op, SelectionDAG &DAG) const;
82  SDValue lowerFDIV_FAST(SDValue Op, SelectionDAG &DAG) const;
83  SDValue LowerFDIV16(SDValue Op, SelectionDAG &DAG) const;
84  SDValue LowerFDIV32(SDValue Op, SelectionDAG &DAG) const;
85  SDValue LowerFDIV64(SDValue Op, SelectionDAG &DAG) const;
86  SDValue LowerFDIV(SDValue Op, SelectionDAG &DAG) const;
87  SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG, bool Signed) const;
88  SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
89  SDValue LowerTrig(SDValue Op, SelectionDAG &DAG) const;
90  SDValue LowerATOMIC_CMP_SWAP(SDValue Op, SelectionDAG &DAG) const;
91  SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
92  SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const;
93  SDValue adjustLoadValueType(unsigned Opcode, MemSDNode *M,
95  bool IsIntrinsic = false) const;
96 
97  // Call DAG.getMemIntrinsicNode for a load, but first widen a dwordx3 type to
98  // dwordx4 if on SI.
99  SDValue getMemIntrinsicNode(unsigned Opcode, const SDLoc &DL, SDVTList VTList,
100  ArrayRef<SDValue> Ops, EVT MemVT,
101  MachineMemOperand *MMO, SelectionDAG &DAG) const;
102 
103  SDValue handleD16VData(SDValue VData, SelectionDAG &DAG) const;
104 
105  /// Converts \p Op, which must be of floating point type, to the
106  /// floating point type \p VT, by either extending or truncating it.
107  SDValue getFPExtOrFPTrunc(SelectionDAG &DAG,
108  SDValue Op,
109  const SDLoc &DL,
110  EVT VT) const;
111 
112  SDValue convertArgType(
113  SelectionDAG &DAG, EVT VT, EVT MemVT, const SDLoc &SL, SDValue Val,
114  bool Signed, const ISD::InputArg *Arg = nullptr) const;
115 
116  /// Custom lowering for ISD::FP_ROUND for MVT::f16.
117  SDValue lowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const;
118  SDValue lowerFMINNUM_FMAXNUM(SDValue Op, SelectionDAG &DAG) const;
119 
120  SDValue getSegmentAperture(unsigned AS, const SDLoc &DL,
121  SelectionDAG &DAG) const;
122 
123  SDValue lowerADDRSPACECAST(SDValue Op, SelectionDAG &DAG) const;
124  SDValue lowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
125  SDValue lowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
126  SDValue lowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const;
127  SDValue lowerTRAP(SDValue Op, SelectionDAG &DAG) const;
128  SDValue lowerDEBUGTRAP(SDValue Op, SelectionDAG &DAG) const;
129 
130  SDNode *adjustWritemask(MachineSDNode *&N, SelectionDAG &DAG) const;
131 
132  SDValue performUCharToFloatCombine(SDNode *N,
133  DAGCombinerInfo &DCI) const;
134  SDValue performSHLPtrCombine(SDNode *N,
135  unsigned AS,
136  EVT MemVT,
137  DAGCombinerInfo &DCI) const;
138 
139  SDValue performMemSDNodeCombine(MemSDNode *N, DAGCombinerInfo &DCI) const;
140 
141  SDValue splitBinaryBitConstantOp(DAGCombinerInfo &DCI, const SDLoc &SL,
142  unsigned Opc, SDValue LHS,
143  const ConstantSDNode *CRHS) const;
144 
145  SDValue performAndCombine(SDNode *N, DAGCombinerInfo &DCI) const;
146  SDValue performOrCombine(SDNode *N, DAGCombinerInfo &DCI) const;
147  SDValue performXorCombine(SDNode *N, DAGCombinerInfo &DCI) const;
148  SDValue performZeroExtendCombine(SDNode *N, DAGCombinerInfo &DCI) const;
149  SDValue performSignExtendInRegCombine(SDNode *N, DAGCombinerInfo &DCI) const;
150  SDValue performClassCombine(SDNode *N, DAGCombinerInfo &DCI) const;
151  SDValue getCanonicalConstantFP(SelectionDAG &DAG, const SDLoc &SL, EVT VT,
152  const APFloat &C) const;
153  SDValue performFCanonicalizeCombine(SDNode *N, DAGCombinerInfo &DCI) const;
154 
155  SDValue performFPMed3ImmCombine(SelectionDAG &DAG, const SDLoc &SL,
156  SDValue Op0, SDValue Op1) const;
157  SDValue performIntMed3ImmCombine(SelectionDAG &DAG, const SDLoc &SL,
158  SDValue Op0, SDValue Op1, bool Signed) const;
159  SDValue performMinMaxCombine(SDNode *N, DAGCombinerInfo &DCI) const;
160  SDValue performFMed3Combine(SDNode *N, DAGCombinerInfo &DCI) const;
161  SDValue performCvtPkRTZCombine(SDNode *N, DAGCombinerInfo &DCI) const;
162  SDValue performExtractVectorEltCombine(SDNode *N, DAGCombinerInfo &DCI) const;
163  SDValue performInsertVectorEltCombine(SDNode *N, DAGCombinerInfo &DCI) const;
164 
165  SDValue reassociateScalarOps(SDNode *N, SelectionDAG &DAG) const;
166  unsigned getFusedOpcode(const SelectionDAG &DAG,
167  const SDNode *N0, const SDNode *N1) const;
168  SDValue performAddCombine(SDNode *N, DAGCombinerInfo &DCI) const;
169  SDValue performAddCarrySubCarryCombine(SDNode *N, DAGCombinerInfo &DCI) const;
170  SDValue performSubCombine(SDNode *N, DAGCombinerInfo &DCI) const;
171  SDValue performFAddCombine(SDNode *N, DAGCombinerInfo &DCI) const;
172  SDValue performFSubCombine(SDNode *N, DAGCombinerInfo &DCI) const;
173  SDValue performFMACombine(SDNode *N, DAGCombinerInfo &DCI) const;
174  SDValue performSetCCCombine(SDNode *N, DAGCombinerInfo &DCI) const;
175  SDValue performCvtF32UByteNCombine(SDNode *N, DAGCombinerInfo &DCI) const;
176  SDValue performClampCombine(SDNode *N, DAGCombinerInfo &DCI) const;
177  SDValue performRcpCombine(SDNode *N, DAGCombinerInfo &DCI) const;
178 
179  bool isLegalFlatAddressingMode(const AddrMode &AM) const;
180  bool isLegalMUBUFAddressingMode(const AddrMode &AM) const;
181 
182  unsigned isCFIntrinsic(const SDNode *Intr) const;
183 
184  /// \returns True if fixup needs to be emitted for given global value \p GV,
185  /// false otherwise.
186  bool shouldEmitFixup(const GlobalValue *GV) const;
187 
188  /// \returns True if GOT relocation needs to be emitted for given global value
189  /// \p GV, false otherwise.
190  bool shouldEmitGOTReloc(const GlobalValue *GV) const;
191 
192  /// \returns True if PC-relative relocation needs to be emitted for given
193  /// global value \p GV, false otherwise.
194  bool shouldEmitPCReloc(const GlobalValue *GV) const;
195 
196  // Analyze a combined offset from an amdgcn_buffer_ intrinsic and store the
197  // three offsets (voffset, soffset and instoffset) into the SDValue[3] array
198  // pointed to by Offsets.
199  void setBufferOffsets(SDValue CombinedOffset, SelectionDAG &DAG,
200  SDValue *Offsets, unsigned Align = 4) const;
201 
202  // Handle 8 bit and 16 bit buffer loads
203  SDValue handleByteShortBufferLoads(SelectionDAG &DAG, EVT LoadVT, SDLoc DL,
204  ArrayRef<SDValue> Ops, MemSDNode *M) const;
205 
206  // Handle 8 bit and 16 bit buffer stores
207  SDValue handleByteShortBufferStores(SelectionDAG &DAG, EVT VDataType,
208  SDLoc DL, SDValue Ops[],
209  MemSDNode *M) const;
210 
211 public:
212  SITargetLowering(const TargetMachine &tm, const GCNSubtarget &STI);
213 
214  const GCNSubtarget *getSubtarget() const;
215 
216  bool isFPExtFoldable(unsigned Opcode, EVT DestVT, EVT SrcVT) const override;
217 
218  bool isShuffleMaskLegal(ArrayRef<int> /*Mask*/, EVT /*VT*/) const override;
219 
220  bool getTgtMemIntrinsic(IntrinsicInfo &, const CallInst &,
221  MachineFunction &MF,
222  unsigned IntrinsicID) const override;
223 
224  bool getAddrModeArguments(IntrinsicInst * /*I*/,
225  SmallVectorImpl<Value*> &/*Ops*/,
226  Type *&/*AccessTy*/) const override;
227 
228  bool isLegalGlobalAddressingMode(const AddrMode &AM) const;
229  bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, Type *Ty,
230  unsigned AS,
231  Instruction *I = nullptr) const override;
232 
233  bool canMergeStoresTo(unsigned AS, EVT MemVT,
234  const SelectionDAG &DAG) const override;
235 
237  EVT VT, unsigned AS, unsigned Align,
239  bool *IsFast = nullptr) const override;
240 
241  EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
242  unsigned SrcAlign, bool IsMemset,
243  bool ZeroMemset,
244  bool MemcpyStrSrc,
245  const AttributeList &FuncAttributes) const override;
246 
247  bool isMemOpUniform(const SDNode *N) const;
248  bool isMemOpHasNoClobberedMemOperand(const SDNode *N) const;
249  bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
250  bool isFreeAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
251 
253  getPreferredVectorAction(MVT VT) const override;
254 
256  Type *Ty) const override;
257 
258  bool isTypeDesirableForOp(unsigned Op, EVT VT) const override;
259 
260  bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override;
261 
262  bool supportSplitCSR(MachineFunction *MF) const override;
263  void initializeSplitCSR(MachineBasicBlock *Entry) const override;
265  MachineBasicBlock *Entry,
266  const SmallVectorImpl<MachineBasicBlock *> &Exits) const override;
267 
269  bool isVarArg,
271  const SDLoc &DL, SelectionDAG &DAG,
272  SmallVectorImpl<SDValue> &InVals) const override;
273 
274  bool CanLowerReturn(CallingConv::ID CallConv,
275  MachineFunction &MF, bool isVarArg,
277  LLVMContext &Context) const override;
278 
279  SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool IsVarArg,
281  const SmallVectorImpl<SDValue> &OutVals, const SDLoc &DL,
282  SelectionDAG &DAG) const override;
283 
284  void passSpecialInputs(
285  CallLoweringInfo &CLI,
286  CCState &CCInfo,
288  SmallVectorImpl<std::pair<unsigned, SDValue>> &RegsToPass,
289  SmallVectorImpl<SDValue> &MemOpChains,
290  SDValue Chain) const;
291 
292  SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
293  CallingConv::ID CallConv, bool isVarArg,
295  const SDLoc &DL, SelectionDAG &DAG,
296  SmallVectorImpl<SDValue> &InVals, bool isThisReturn,
297  SDValue ThisVal) const;
298 
299  bool mayBeEmittedAsTailCall(const CallInst *) const override;
300 
302  SDValue Callee, CallingConv::ID CalleeCC, bool isVarArg,
304  const SmallVectorImpl<SDValue> &OutVals,
305  const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG) const;
306 
308  SmallVectorImpl<SDValue> &InVals) const override;
309 
310  unsigned getRegisterByName(const char* RegName, EVT VT,
311  SelectionDAG &DAG) const override;
312 
314  MachineBasicBlock *BB) const;
315 
318  MachineBasicBlock *BB) const override;
319 
320  bool hasBitPreservingFPLogic(EVT VT) const override;
321  bool enableAggressiveFMAFusion(EVT VT) const override;
322  EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
323  EVT VT) const override;
324  MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override;
325  bool isFMAFasterThanFMulAndFAdd(EVT VT) const override;
328  SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
329 
331  SelectionDAG &DAG) const override;
332 
333  SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
334  SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const override;
336  SDNode *Node) const override;
337 
339 
341  SDValue Ptr) const;
342  MachineSDNode *buildRSRC(SelectionDAG &DAG, const SDLoc &DL, SDValue Ptr,
343  uint32_t RsrcDword1, uint64_t RsrcDword2And3) const;
344  std::pair<unsigned, const TargetRegisterClass *>
346  StringRef Constraint, MVT VT) const override;
347  ConstraintType getConstraintType(StringRef Constraint) const override;
348  SDValue copyToM0(SelectionDAG &DAG, SDValue Chain, const SDLoc &DL,
349  SDValue V) const;
350 
351  void finalizeLowering(MachineFunction &MF) const override;
352 
354  KnownBits &Known,
355  const APInt &DemandedElts,
356  const SelectionDAG &DAG,
357  unsigned Depth = 0) const override;
358 
359  bool isSDNodeSourceOfDivergence(const SDNode *N,
360  FunctionLoweringInfo *FLI, LegacyDivergenceAnalysis *DA) const override;
361 
362  bool isCanonicalized(SelectionDAG &DAG, SDValue Op,
363  unsigned MaxDepth = 5) const;
364  bool denormalsEnabledForType(EVT VT) const;
365 
367  const SelectionDAG &DAG,
368  bool SNaN = false,
369  unsigned Depth = 0) const override;
371 
372  unsigned getPrefLoopAlignment(MachineLoop *ML) const override;
373 };
374 
375 } // End namespace llvm
376 
377 #endif
uint64_t CallInst * C
A parsed version of the target data layout string in and methods for querying it. ...
Definition: DataLayout.h:110
unsigned getVectorTypeBreakdownForCallingConv(LLVMContext &Context, CallingConv::ID CC, EVT VT, EVT &IntermediateVT, unsigned &NumIntermediates, MVT &RegisterVT) const override
Certain targets such as MIPS require that some types such as vectors are always broken down into scal...
constexpr char Align[]
Key for Kernel::Arg::Metadata::mAlign.
bool isLegalGlobalAddressingMode(const AddrMode &AM) const
This represents an addressing mode of: BaseGV + BaseOffs + BaseReg + Scale*ScaleReg If BaseGV is null...
std::pair< unsigned, const TargetRegisterClass * > getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI, StringRef Constraint, MVT VT) const override
Given a physical register constraint (e.g.
bool isFMAFasterThanFMulAndFAdd(EVT VT) const override
Return true if an FMA operation is faster than a pair of fmul and fadd instructions.
LLVMContext & Context
This class represents lattice values for constants.
Definition: AllocatorList.h:23
bool getTgtMemIntrinsic(IntrinsicInfo &, const CallInst &, MachineFunction &MF, unsigned IntrinsicID) const override
Given an intrinsic, checks if on the target the intrinsic will need to map to a MemIntrinsicNode (tou...
InputArg - This struct carries flags and type information about a single incoming (formal) argument o...
bool supportSplitCSR(MachineFunction *MF) const override
Return true if the target supports that a subset of CSRs for the given machine function is handled ex...
unsigned getNumRegistersForCallingConv(LLVMContext &Context, CallingConv::ID CC, EVT VT) const override
Certain targets require unusual breakdowns of certain types.
SDValue copyToM0(SelectionDAG &DAG, SDValue Chain, const SDLoc &DL, SDValue V) const
bool canMergeStoresTo(unsigned AS, EVT MemVT, const SelectionDAG &DAG) const override
Returns if it&#39;s reasonable to merge stores to MemVT size.
This class represents a function call, abstracting a target machine&#39;s calling convention.
const GCNSubtarget * getSubtarget() const
Offsets
Offsets in bytes from the start of the input buffer.
Definition: SIInstrInfo.h:1042
Function Alias Analysis Results
EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context, EVT VT) const override
Return the ValueType of the result of SETCC operations.
SDNode * legalizeTargetIndependentNode(SDNode *Node, SelectionDAG &DAG) const
Legalize target independent instructions (e.g.
unsigned const TargetRegisterInfo * TRI
an instruction that atomically reads a memory location, combines it with another value, and then stores the result back.
Definition: Instructions.h:691
AtomicExpansionKind
Enum that specifies what an atomic load/AtomicRMWInst is expanded to, if at all.
void ReplaceNodeResults(SDNode *N, SmallVectorImpl< SDValue > &Results, SelectionDAG &DAG) const override
This callback is invoked when a node result type is illegal for the target, and the operation was reg...
SDValue LowerCall(CallLoweringInfo &CLI, SmallVectorImpl< SDValue > &InVals) const override
This hook must be implemented to lower calls into the specified DAG.
MachineSDNode * wrapAddr64Rsrc(SelectionDAG &DAG, const SDLoc &DL, SDValue Ptr) const
TargetLoweringBase::LegalizeTypeAction getPreferredVectorAction(MVT VT) const override
Return the preferred vector type legalization action.
A description of a memory reference used in the backend.
EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign, unsigned SrcAlign, bool IsMemset, bool ZeroMemset, bool MemcpyStrSrc, const AttributeList &FuncAttributes) const override
Returns the target specific optimal type for load and store operations as a result of memset...
bool isMemOpUniform(const SDNode *N) const
bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override
Return true if folding a constant offset with the given GlobalAddress is legal.
unsigned Intr
This represents a list of ValueType&#39;s that has been intern&#39;d by a SelectionDAG.
bool isSDNodeSourceOfDivergence(const SDNode *N, FunctionLoweringInfo *FLI, LegacyDivergenceAnalysis *DA) const override
bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, Type *Ty, unsigned AS, Instruction *I=nullptr) const override
Return true if the addressing mode represented by AM is legal for this target, for a load/store of th...
SITargetLowering(const TargetMachine &tm, const GCNSubtarget &STI)
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:32
bool enableAggressiveFMAFusion(EVT VT) const override
Return true if target always beneficiates from combining into FMA for a given value type...
ConstraintType getConstraintType(StringRef Constraint) const override
Given a constraint, return the type of constraint it is for this target.
bool getAddrModeArguments(IntrinsicInst *, SmallVectorImpl< Value *> &, Type *&) const override
CodeGenPrepare sinks address calculations into the same BB as Load/Store instructions reading the add...
void insertCopiesSplitCSR(MachineBasicBlock *Entry, const SmallVectorImpl< MachineBasicBlock *> &Exits) const override
Insert explicit copies in entry and exit blocks.
Analysis containing CSE Info
Definition: CSEInfo.cpp:20
SDValue splitBinaryVectorOp(SDValue Op, SelectionDAG &DAG) const
bool isMemOpHasNoClobberedMemOperand(const SDNode *N) const
MachineBasicBlock * splitKillBlock(MachineInstr &MI, MachineBasicBlock *BB) const
Machine Value Type.
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:45
This is an important class for using LLVM in a threaded context.
Definition: LLVMContext.h:64
SDNode * PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const override
Fold the instructions after selecting them.
bool hasBitPreservingFPLogic(EVT VT) const override
Return true if it is safe to transform an integer-domain bitwise operation into the equivalent floati...
bool isEligibleForTailCallOptimization(SDValue Callee, CallingConv::ID CalleeCC, bool isVarArg, const SmallVectorImpl< ISD::OutputArg > &Outs, const SmallVectorImpl< SDValue > &OutVals, const SmallVectorImpl< ISD::InputArg > &Ins, SelectionDAG &DAG) const
AtomicExpansionKind shouldExpandAtomicRMWInIR(AtomicRMWInst *) const override
Returns how the IR-level AtomicExpand pass should expand the given AtomicRMW, if at all...
bool isKnownNeverNaNForTargetNode(SDValue Op, const SelectionDAG &DAG, bool SNaN=false, unsigned Depth=0) const override
If SNaN is false,.
bool mayBeEmittedAsTailCall(const CallInst *) const override
Return true if the target may be able emit the call instruction as a tail call.
amdgpu Simplify well known AMD library false FunctionCallee Value * Arg
Extended Value Type.
Definition: ValueTypes.h:33
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
This structure contains all information that is necessary for lowering calls.
const unsigned MaxDepth
MVT getScalarShiftAmountTy(const DataLayout &, EVT) const override
EVT is not used in-tree, but is used by out-of-tree target.
MachineSDNode * buildRSRC(SelectionDAG &DAG, const SDLoc &DL, SDValue Ptr, uint32_t RsrcDword1, uint64_t RsrcDword2And3) const
Return a resource descriptor with the &#39;Add TID&#39; bit enabled The TID (Thread ID) is multiplied by the ...
CCState - This class holds information needed while lowering arguments and return values...
bool isFPExtFoldable(unsigned Opcode, EVT DestVT, EVT SrcVT) const override
Return true if an fpext operation input to an Opcode operation is free (for instance, because half-precision floating-point numbers are implicitly extended to float-precision) for an FMA instruction.
This is used to represent a portion of an LLVM function in a low-level Data Dependence DAG representa...
Definition: SelectionDAG.h:221
Interface definition of the TargetLowering class that is common to all AMD GPUs.
CCValAssign - Represent assignment of one arg/retval to a location.
bool isFreeAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override
Returns true if a cast from SrcAS to DestAS is "cheap", such that e.g.
An SDNode that represents everything that will be needed to construct a MachineInstr.
This is an abstract virtual class for memory operations.
Wrapper class for IR location info (IR ordering and DebugLoc) to be passed into SDNode creation funct...
Represents one node in the SelectionDAG.
SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, const SmallVectorImpl< ISD::InputArg > &Ins, const SDLoc &DL, SelectionDAG &DAG, SmallVectorImpl< SDValue > &InVals) const override
This hook must be implemented to lower the incoming (formal) arguments, described by the Ins array...
Class for arbitrary precision integers.
Definition: APInt.h:69
amdgpu Simplify well known AMD library false FunctionCallee Callee
void finalizeLowering(MachineFunction &MF) const override
Execute target specific actions to finalize target lowering.
bool CanLowerReturn(CallingConv::ID CallConv, MachineFunction &MF, bool isVarArg, const SmallVectorImpl< ISD::OutputArg > &Outs, LLVMContext &Context) const override
This hook should be implemented to check whether the return values described by the Outs array can fi...
void AdjustInstrPostInstrSelection(MachineInstr &MI, SDNode *Node) const override
Assign the register class depending on the number of bits set in the writemask.
Flags
Flags values. These may be or&#39;d together.
bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override
Returns true if a cast between SrcAS and DestAS is a noop.
Representation of each machine instruction.
Definition: MachineInstr.h:63
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
This hook must be implemented to lower outgoing return values, described by the Outs array...
This class keeps track of the SPI_SP_INPUT_ADDR config register, which tells the hardware which inter...
Interface definition for SIInstrInfo.
bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AS, unsigned Align, MachineMemOperand::Flags Flags=MachineMemOperand::MONone, bool *IsFast=nullptr) const override
Determine if the target supports unaligned memory accesses.
bool isCanonicalized(SelectionDAG &DAG, SDValue Op, unsigned MaxDepth=5) const
#define I(x, y, z)
Definition: MD5.cpp:58
bool isShuffleMaskLegal(ArrayRef< int >, EVT) const override
Targets can use this to indicate that they only support some VECTOR_SHUFFLE operations, those with specific masks.
#define N
FunctionLoweringInfo - This contains information that is global to a function that is used when lower...
MVT getRegisterTypeForCallingConv(LLVMContext &Context, CallingConv::ID CC, EVT VT) const override
Certain combinations of ABIs, Targets and features require that types are legal for some operations a...
uint32_t Size
Definition: Profile.cpp:46
SDValue splitUnaryVectorOp(SDValue Op, SelectionDAG &DAG) const
LegalizeTypeAction
This enum indicates whether a types are legal for a target, and if not, what action should be used to...
bool denormalsEnabledForType(EVT VT) const
unsigned getPrefLoopAlignment(MachineLoop *ML) const override
Return the preferred loop alignment.
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override
This method will be invoked for all target nodes and for any target-independent nodes that the target...
void computeKnownBitsForFrameIndex(const SDValue Op, KnownBits &Known, const APInt &DemandedElts, const SelectionDAG &DAG, unsigned Depth=0) const override
Determine which of the bits of FrameIndex FIOp are known to be 0.
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:65
IRTranslator LLVM IR MI
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
bool isTypeDesirableForOp(unsigned Op, EVT VT) const override
Return true if the target has native support for the specified value type and it is &#39;desirable&#39; to us...
void passSpecialInputs(CallLoweringInfo &CLI, CCState &CCInfo, const SIMachineFunctionInfo &Info, SmallVectorImpl< std::pair< unsigned, SDValue >> &RegsToPass, SmallVectorImpl< SDValue > &MemOpChains, SDValue Chain) const
SDValue LowerCallResult(SDValue Chain, SDValue InFlag, CallingConv::ID CallConv, bool isVarArg, const SmallVectorImpl< ISD::InputArg > &Ins, const SDLoc &DL, SelectionDAG &DAG, SmallVectorImpl< SDValue > &InVals, bool isThisReturn, SDValue ThisVal) const
Unlike LLVM values, Selection DAG nodes may return multiple values as the result of a computation...
MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr &MI, MachineBasicBlock *BB) const override
This method should be implemented by targets that mark instructions with the &#39;usesCustomInserter&#39; fla...
bool shouldConvertConstantLoadToIntImm(const APInt &Imm, Type *Ty) const override
Return true if it is beneficial to convert a load of a constant to just the constant itself...
void initializeSplitCSR(MachineBasicBlock *Entry) const override
Perform necessary initialization to handle a subset of CSRs explicitly via copies.
A wrapper class for inspecting calls to intrinsic functions.
Definition: IntrinsicInst.h:43
unsigned getRegisterByName(const char *RegName, EVT VT, SelectionDAG &DAG) const override
Return the register ID of the name passed in.
SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override
This callback is invoked for operations that are unsupported by the target, which are registered to u...
This class is used to represent ISD::LOAD nodes.