1 //===-- XCoreISelLowering.h - XCore 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 XCore uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef XCOREISELLOWERING_H
16 #define XCOREISELLOWERING_H
19 #include "llvm/CodeGen/SelectionDAG.h"
20 #include "llvm/Target/TargetLowering.h"
24 // Forward delcarations
26 class XCoreTargetMachine;
30 // Start the numbering where the builtin ops and target ops leave off.
31 FIRST_NUMBER = ISD::BUILTIN_OP_END,
33 // Branch and link (call)
36 // pc relative address
39 // dp relative address
42 // cp relative address
45 // Store word to stack
48 // Corresponds to retsp instruction
51 // Corresponds to LADD instruction
54 // Corresponds to LSUB instruction
57 // Corresponds to LMUL instruction
60 // Corresponds to MACCU instruction
63 // Corresponds to MACCS instruction
66 // Corresponds to CRC8 instruction
72 // Jumptable branch using long branches for each entry.
75 // Offset from frame pointer to the first (possible) on-stack argument
83 //===--------------------------------------------------------------------===//
84 // TargetLowering Implementation
85 //===--------------------------------------------------------------------===//
86 class XCoreTargetLowering : public TargetLowering
90 explicit XCoreTargetLowering(XCoreTargetMachine &TM);
92 using TargetLowering::isZExtFree;
93 virtual bool isZExtFree(SDValue Val, EVT VT2) const;
96 virtual unsigned getJumpTableEncoding() const;
97 virtual MVT getScalarShiftAmountTy(EVT LHSTy) const { return MVT::i32; }
99 /// LowerOperation - Provide custom lowering hooks for some operations.
100 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
102 /// ReplaceNodeResults - Replace the results of node with an illegal result
103 /// type with new values built out of custom code.
105 virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results,
106 SelectionDAG &DAG) const;
108 /// getTargetNodeName - This method returns the name of a target specific
110 virtual const char *getTargetNodeName(unsigned Opcode) const;
112 virtual MachineBasicBlock *
113 EmitInstrWithCustomInserter(MachineInstr *MI,
114 MachineBasicBlock *MBB) const;
116 virtual bool isLegalAddressingMode(const AddrMode &AM,
120 const XCoreTargetMachine &TM;
121 const XCoreSubtarget &Subtarget;
123 // Lower Operand helpers
124 SDValue LowerCCCArguments(SDValue Chain,
125 CallingConv::ID CallConv,
127 const SmallVectorImpl<ISD::InputArg> &Ins,
128 SDLoc dl, SelectionDAG &DAG,
129 SmallVectorImpl<SDValue> &InVals) const;
130 SDValue LowerCCCCallTo(SDValue Chain, SDValue Callee,
131 CallingConv::ID CallConv, bool isVarArg,
133 const SmallVectorImpl<ISD::OutputArg> &Outs,
134 const SmallVectorImpl<SDValue> &OutVals,
135 const SmallVectorImpl<ISD::InputArg> &Ins,
136 SDLoc dl, SelectionDAG &DAG,
137 SmallVectorImpl<SDValue> &InVals) const;
138 SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
139 CallingConv::ID CallConv, bool isVarArg,
140 const SmallVectorImpl<ISD::InputArg> &Ins,
141 SDLoc dl, SelectionDAG &DAG,
142 SmallVectorImpl<SDValue> &InVals) const;
143 SDValue getReturnAddressFrameIndex(SelectionDAG &DAG) const;
144 SDValue getGlobalAddressWrapper(SDValue GA, const GlobalValue *GV,
145 SelectionDAG &DAG) const;
146 SDValue lowerLoadWordFromAlignedBasePlusOffset(SDLoc DL, SDValue Chain,
147 SDValue Base, int64_t Offset,
148 SelectionDAG &DAG) const;
150 // Lower Operand specifics
151 SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
152 SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
153 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
154 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
155 SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const;
156 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
157 SDValue LowerBR_JT(SDValue Op, SelectionDAG &DAG) const;
158 SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
159 SDValue LowerVAARG(SDValue Op, SelectionDAG &DAG) const;
160 SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const;
161 SDValue LowerUMUL_LOHI(SDValue Op, SelectionDAG &DAG) const;
162 SDValue LowerSMUL_LOHI(SDValue Op, SelectionDAG &DAG) const;
163 SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const;
164 SDValue LowerFRAME_TO_ARGS_OFFSET(SDValue Op, SelectionDAG &DAG) const;
165 SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const;
166 SDValue LowerINIT_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) const;
167 SDValue LowerADJUST_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) const;
168 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
169 SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG) const;
171 // Inline asm support
172 std::pair<unsigned, const TargetRegisterClass*>
173 getRegForInlineAsmConstraint(const std::string &Constraint,
177 SDValue TryExpandADDWithMul(SDNode *Op, SelectionDAG &DAG) const;
178 SDValue ExpandADDSUB(SDNode *Op, SelectionDAG &DAG) const;
180 virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
182 virtual void computeMaskedBitsForTargetNode(const SDValue Op,
185 const SelectionDAG &DAG,
186 unsigned Depth = 0) const;
189 LowerFormalArguments(SDValue Chain,
190 CallingConv::ID CallConv,
192 const SmallVectorImpl<ISD::InputArg> &Ins,
193 SDLoc dl, SelectionDAG &DAG,
194 SmallVectorImpl<SDValue> &InVals) const;
197 LowerCall(TargetLowering::CallLoweringInfo &CLI,
198 SmallVectorImpl<SDValue> &InVals) const;
201 LowerReturn(SDValue Chain,
202 CallingConv::ID CallConv, bool isVarArg,
203 const SmallVectorImpl<ISD::OutputArg> &Outs,
204 const SmallVectorImpl<SDValue> &OutVals,
205 SDLoc dl, SelectionDAG &DAG) const;
208 CanLowerReturn(CallingConv::ID CallConv, MachineFunction &MF,
210 const SmallVectorImpl<ISD::OutputArg> &ArgsFlags,
211 LLVMContext &Context) const;
215 #endif // XCOREISELLOWERING_H