1 //==-- MSP430ISelLowering.h - MSP430 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 MSP430 uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_TARGET_MSP430_ISELLOWERING_H
16 #define LLVM_TARGET_MSP430_ISELLOWERING_H
19 #include "llvm/CodeGen/SelectionDAG.h"
20 #include "llvm/Target/TargetLowering.h"
25 FIRST_NUMBER = ISD::BUILTIN_OP_END,
27 /// Return with a flag operand. Operand 0 is the chain operand.
30 /// Same as RET_FLAG, but used for returning from ISRs.
33 /// Y = R{R,L}A X, rotate right (left) arithmetically
36 /// Y = RRC X, rotate right via carry
39 /// CALL - These operations represent an abstract call
40 /// instruction, which includes a bunch of information.
43 /// Wrapper - A wrapper node for TargetConstantPool, TargetExternalSymbol,
44 /// and TargetGlobalAddress.
47 /// CMP - Compare instruction.
50 /// SetCC - Operand 0 is condition code, and operand 1 is the flag
51 /// operand produced by a CMP instruction.
54 /// MSP430 conditional branches. Operand 0 is the chain operand, operand 1
55 /// is the block to branch if condition is true, operand 2 is the
56 /// condition code, and operand 3 is the flag operand produced by a CMP
60 /// SELECT_CC - Operand 0 and operand 1 are selection variable, operand 3
61 /// is condition code and operand 4 is flag operand.
64 /// SHL, SRA, SRL - Non-constant shifts.
69 class MSP430Subtarget;
70 class MSP430TargetMachine;
72 class MSP430TargetLowering : public TargetLowering {
74 explicit MSP430TargetLowering(MSP430TargetMachine &TM);
76 /// LowerOperation - Provide custom lowering hooks for some operations.
77 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
79 /// getTargetNodeName - This method returns the name of a target specific
81 virtual const char *getTargetNodeName(unsigned Opcode) const;
83 /// getFunctionAlignment - Return the Log2 alignment of this function.
84 virtual unsigned getFunctionAlignment(const Function *F) const;
86 SDValue LowerShifts(SDValue Op, SelectionDAG &DAG);
87 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
88 SDValue LowerExternalSymbol(SDValue Op, SelectionDAG &DAG);
89 SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG);
90 SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG);
91 SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG);
92 SDValue LowerSIGN_EXTEND(SDValue Op, SelectionDAG &DAG);
93 SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG);
94 SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG);
95 SDValue getReturnAddressFrameIndex(SelectionDAG &DAG);
97 TargetLowering::ConstraintType
98 getConstraintType(const std::string &Constraint) const;
99 std::pair<unsigned, const TargetRegisterClass*>
100 getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const;
102 MachineBasicBlock* EmitInstrWithCustomInserter(MachineInstr *MI,
103 MachineBasicBlock *BB,
104 DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const;
105 MachineBasicBlock* EmitShiftInstr(MachineInstr *MI,
106 MachineBasicBlock *BB,
107 DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const;
110 SDValue LowerCCCCallTo(SDValue Chain, SDValue Callee,
111 CallingConv::ID CallConv, bool isVarArg,
113 const SmallVectorImpl<ISD::OutputArg> &Outs,
114 const SmallVectorImpl<ISD::InputArg> &Ins,
115 DebugLoc dl, SelectionDAG &DAG,
116 SmallVectorImpl<SDValue> &InVals);
118 SDValue LowerCCCArguments(SDValue Chain,
119 CallingConv::ID CallConv,
121 const SmallVectorImpl<ISD::InputArg> &Ins,
124 SmallVectorImpl<SDValue> &InVals);
126 SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
127 CallingConv::ID CallConv, bool isVarArg,
128 const SmallVectorImpl<ISD::InputArg> &Ins,
129 DebugLoc dl, SelectionDAG &DAG,
130 SmallVectorImpl<SDValue> &InVals);
133 LowerFormalArguments(SDValue Chain,
134 CallingConv::ID CallConv, bool isVarArg,
135 const SmallVectorImpl<ISD::InputArg> &Ins,
136 DebugLoc dl, SelectionDAG &DAG,
137 SmallVectorImpl<SDValue> &InVals);
139 LowerCall(SDValue Chain, SDValue Callee,
140 CallingConv::ID CallConv, bool isVarArg, bool isTailCall,
141 const SmallVectorImpl<ISD::OutputArg> &Outs,
142 const SmallVectorImpl<ISD::InputArg> &Ins,
143 DebugLoc dl, SelectionDAG &DAG,
144 SmallVectorImpl<SDValue> &InVals);
147 LowerReturn(SDValue Chain,
148 CallingConv::ID CallConv, bool isVarArg,
149 const SmallVectorImpl<ISD::OutputArg> &Outs,
150 DebugLoc dl, SelectionDAG &DAG);
152 virtual bool getPostIndexedAddressParts(SDNode *N, SDNode *Op,
155 ISD::MemIndexedMode &AM,
156 SelectionDAG &DAG) const;
158 const MSP430Subtarget &Subtarget;
159 const MSP430TargetMachine &TM;
160 const TargetData *TD;
164 #endif // LLVM_TARGET_MSP430_ISELLOWERING_H