1 //===-- ARMISelLowering.h - ARM DAG Lowering Interface ----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that ARM uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef ARMISELLOWERING_H
16 #define ARMISELLOWERING_H
18 #include "ARMSubtarget.h"
19 #include "llvm/Target/TargetLowering.h"
20 #include "llvm/CodeGen/SelectionDAG.h"
21 #include "llvm/CodeGen/CallingConvLower.h"
25 class ARMConstantPoolValue;
28 // ARM Specific DAG Nodes
30 // Start the numbering where the builtin ops and target ops leave off.
31 FIRST_NUMBER = ISD::BUILTIN_OP_END,
33 Wrapper, // Wrapper - A wrapper node for TargetConstantPool,
34 // TargetExternalSymbol, and TargetGlobalAddress.
35 WrapperJT, // WrapperJT - A wrapper node for TargetJumpTable
37 CALL, // Function call.
38 CALL_PRED, // Function call that's predicable.
39 CALL_NOLINK, // Function call with branch not branch-and-link.
40 tCALL, // Thumb function call.
41 BRCOND, // Conditional branch.
42 BR_JT, // Jumptable branch.
43 BR2_JT, // Jumptable branch (2 level - jumptable entry is a jump).
44 RET_FLAG, // Return with a flag operand.
46 PIC_ADD, // Add with a PC operand and a PIC label.
48 CMP, // ARM compare instructions.
49 CMPZ, // ARM compare that sets only Z flag.
50 CMPFP, // ARM VFP compare instruction, sets FPSCR.
51 CMPFPw0, // ARM VFP compare against zero instruction, sets FPSCR.
52 FMSTAT, // ARM fmstat instruction.
53 CMOV, // ARM conditional move instructions.
54 CNEG, // ARM conditional negate instructions.
56 FTOSI, // FP to sint within a FP register.
57 FTOUI, // FP to uint within a FP register.
58 SITOF, // sint to FP within a FP register.
59 UITOF, // uint to FP within a FP register.
61 SRL_FLAG, // V,Flag = srl_flag X -> srl X, 1 + save carry out.
62 SRA_FLAG, // V,Flag = sra_flag X -> sra X, 1 + save carry out.
63 RRX, // V = RRX X, Flag -> srl X, 1 + shift in carry flag.
65 FMRRD, // double to two gprs.
66 FMDRR, // Two gprs to double.
68 EH_SJLJ_SETJMP, // SjLj exception handling setjmp
69 EH_SJLJ_LONGJMP, // SjLj exception handling longjmp
73 VCEQ, // Vector compare equal.
74 VCGE, // Vector compare greater than or equal.
75 VCGEU, // Vector compare unsigned greater than or equal.
76 VCGT, // Vector compare greater than.
77 VCGTU, // Vector compare unsigned greater than.
78 VTST, // Vector test bits.
80 // Vector shift by immediate:
82 VSHRs, // ...right (signed)
83 VSHRu, // ...right (unsigned)
84 VSHLLs, // ...left long (signed)
85 VSHLLu, // ...left long (unsigned)
86 VSHLLi, // ...left long (with maximum shift count)
87 VSHRN, // ...right narrow
89 // Vector rounding shift by immediate:
90 VRSHRs, // ...right (signed)
91 VRSHRu, // ...right (unsigned)
92 VRSHRN, // ...right narrow
94 // Vector saturating shift by immediate:
95 VQSHLs, // ...left (signed)
96 VQSHLu, // ...left (unsigned)
97 VQSHLsu, // ...left (signed to unsigned)
98 VQSHRNs, // ...right narrow (signed)
99 VQSHRNu, // ...right narrow (unsigned)
100 VQSHRNsu, // ...right narrow (signed to unsigned)
102 // Vector saturating rounding shift by immediate:
103 VQRSHRNs, // ...right narrow (signed)
104 VQRSHRNu, // ...right narrow (unsigned)
105 VQRSHRNsu, // ...right narrow (signed to unsigned)
107 // Vector shift and insert:
111 // Vector get lane (VMOV scalar to ARM core register)
112 // (These are used for 8- and 16-bit element types only.)
113 VGETLANEu, // zero-extend vector extract element
114 VGETLANEs, // sign-extend vector extract element
116 // Vector duplicate lane (128-bit result only; 64-bit is a shuffle)
117 VDUPLANEQ // splat a lane from a 64-bit vector to a 128-bit vector
121 /// Define some predicates that are used for node matching.
123 /// getVMOVImm - If this is a build_vector of constants which can be
124 /// formed by using a VMOV instruction of the specified element size,
125 /// return the constant being splatted. The ByteSize field indicates the
126 /// number of bytes of each element [1248].
127 SDValue getVMOVImm(SDNode *N, unsigned ByteSize, SelectionDAG &DAG);
129 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
130 /// instruction with the specified blocksize. (The order of the elements
131 /// within each block of the vector is reversed.)
132 bool isVREVMask(ShuffleVectorSDNode *N, unsigned blocksize);
135 //===--------------------------------------------------------------------===//
136 // ARMTargetLowering - ARM Implementation of the TargetLowering interface
138 class ARMTargetLowering : public TargetLowering {
139 int VarArgsFrameIndex; // FrameIndex for start of varargs area.
141 explicit ARMTargetLowering(TargetMachine &TM);
143 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
145 /// ReplaceNodeResults - Replace the results of node with an illegal result
146 /// type with new values built out of custom code.
148 virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results,
151 virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
153 virtual const char *getTargetNodeName(unsigned Opcode) const;
155 virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
156 MachineBasicBlock *MBB) const;
158 /// isLegalAddressingMode - Return true if the addressing mode represented
159 /// by AM is legal for this target, for a load/store of the specified type.
160 virtual bool isLegalAddressingMode(const AddrMode &AM, const Type *Ty)const;
162 /// getPreIndexedAddressParts - returns true by value, base pointer and
163 /// offset pointer and addressing mode by reference if the node's address
164 /// can be legally represented as pre-indexed load / store address.
165 virtual bool getPreIndexedAddressParts(SDNode *N, SDValue &Base,
167 ISD::MemIndexedMode &AM,
168 SelectionDAG &DAG) const;
170 /// getPostIndexedAddressParts - returns true by value, base pointer and
171 /// offset pointer and addressing mode by reference if this node can be
172 /// combined with a load / store to form a post-indexed load / store.
173 virtual bool getPostIndexedAddressParts(SDNode *N, SDNode *Op,
174 SDValue &Base, SDValue &Offset,
175 ISD::MemIndexedMode &AM,
176 SelectionDAG &DAG) const;
178 virtual void computeMaskedBitsForTargetNode(const SDValue Op,
182 const SelectionDAG &DAG,
183 unsigned Depth) const;
184 ConstraintType getConstraintType(const std::string &Constraint) const;
185 std::pair<unsigned, const TargetRegisterClass*>
186 getRegForInlineAsmConstraint(const std::string &Constraint,
188 std::vector<unsigned>
189 getRegClassForInlineAsmConstraint(const std::string &Constraint,
192 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
193 /// vector. If it is invalid, don't add anything to Ops. If hasMemory is
194 /// true it means one of the asm constraint of the inline asm instruction
195 /// being processed is 'm'.
196 virtual void LowerAsmOperandForConstraint(SDValue Op,
197 char ConstraintLetter,
199 std::vector<SDValue> &Ops,
200 SelectionDAG &DAG) const;
202 virtual const ARMSubtarget* getSubtarget() {
206 /// getFunctionAlignment - Return the Log2 alignment of this function.
207 virtual unsigned getFunctionAlignment(const Function *F) const;
210 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
211 /// make the right decision when generating code for different targets.
212 const ARMSubtarget *Subtarget;
214 /// ARMPCLabelIndex - Keep track of the number of ARM PC labels created.
216 unsigned ARMPCLabelIndex;
218 void addTypeForNEON(MVT VT, MVT PromotedLdStVT, MVT PromotedBitwiseVT);
219 void addDRTypeForNEON(MVT VT);
220 void addQRTypeForNEON(MVT VT);
222 typedef SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPassVector;
223 void PassF64ArgInRegs(CallSDNode *TheCall, SelectionDAG &DAG,
224 SDValue Chain, SDValue &Arg,
225 RegsToPassVector &RegsToPass,
226 CCValAssign &VA, CCValAssign &NextVA,
228 SmallVector<SDValue, 8> &MemOpChains,
229 ISD::ArgFlagsTy Flags);
230 SDValue GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
231 SDValue &Root, SelectionDAG &DAG, DebugLoc dl);
233 CCAssignFn *CCAssignFnForNode(unsigned CC, bool Return) const;
234 SDValue LowerMemOpCallTo(CallSDNode *TheCall, SelectionDAG &DAG,
235 const SDValue &StackPtr, const CCValAssign &VA,
236 SDValue Chain, SDValue Arg, ISD::ArgFlagsTy Flags);
237 SDNode *LowerCallResult(SDValue Chain, SDValue InFlag, CallSDNode *TheCall,
238 unsigned CallingConv, SelectionDAG &DAG);
239 SDValue LowerCALL(SDValue Op, SelectionDAG &DAG);
240 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG);
241 SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
242 SDValue LowerGlobalAddressDarwin(SDValue Op, SelectionDAG &DAG);
243 SDValue LowerGlobalAddressELF(SDValue Op, SelectionDAG &DAG);
244 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG);
245 SDValue LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
247 SDValue LowerToTLSExecModels(GlobalAddressSDNode *GA,
249 SDValue LowerGLOBAL_OFFSET_TABLE(SDValue Op, SelectionDAG &DAG);
250 SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
251 SDValue LowerBR_JT(SDValue Op, SelectionDAG &DAG);
252 SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG);
254 SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
256 SDValue Dst, SDValue Src,
257 SDValue Size, unsigned Align,
259 const Value *DstSV, uint64_t DstSVOff,
260 const Value *SrcSV, uint64_t SrcSVOff);
264 #endif // ARMISELLOWERING_H