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 /// Y = R{R,L}A X, rotate right (left) arithmetically
33 /// Y = RRC X, rotate right via carry
36 /// CALL - These operations represent an abstract call
37 /// instruction, which includes a bunch of information.
40 /// Wrapper - A wrapper node for TargetConstantPool, TargetExternalSymbol,
41 /// and TargetGlobalAddress.
44 /// CMP - Compare instruction.
47 /// SetCC. Operand 0 is condition code, and operand 1 is the flag
48 /// operand produced by a CMP instruction.
51 /// MSP430 conditional branches. Operand 0 is the chain operand, operand 1
52 /// is the block to branch if condition is true, operand 2 is the
53 /// condition code, and operand 3 is the flag operand produced by a CMP
57 /// SELECT_CC. Operand 0 and operand 1 are selection variable, operand 3
58 /// is condition code and operand 4 is flag operand.
63 class MSP430Subtarget;
64 class MSP430TargetMachine;
66 class MSP430TargetLowering : public TargetLowering {
68 explicit MSP430TargetLowering(MSP430TargetMachine &TM);
70 /// LowerOperation - Provide custom lowering hooks for some operations.
71 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
73 /// getTargetNodeName - This method returns the name of a target specific
75 virtual const char *getTargetNodeName(unsigned Opcode) const;
77 /// getFunctionAlignment - Return the Log2 alignment of this function.
78 virtual unsigned getFunctionAlignment(const Function *F) const;
80 SDValue LowerShifts(SDValue Op, SelectionDAG &DAG);
81 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
82 SDValue LowerExternalSymbol(SDValue Op, SelectionDAG &DAG);
83 SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG);
84 SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG);
85 SDValue LowerSIGN_EXTEND(SDValue Op, SelectionDAG &DAG);
87 TargetLowering::ConstraintType
88 getConstraintType(const std::string &Constraint) const;
89 std::pair<unsigned, const TargetRegisterClass*>
90 getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const;
92 MachineBasicBlock* EmitInstrWithCustomInserter(MachineInstr *MI,
93 MachineBasicBlock *BB,
94 DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const;
97 SDValue LowerCCCCallTo(SDValue Chain, SDValue Callee,
98 CallingConv::ID CallConv, bool isVarArg,
100 const SmallVectorImpl<ISD::OutputArg> &Outs,
101 const SmallVectorImpl<ISD::InputArg> &Ins,
102 DebugLoc dl, SelectionDAG &DAG,
103 SmallVectorImpl<SDValue> &InVals);
105 SDValue LowerCCCArguments(SDValue Chain,
106 CallingConv::ID CallConv,
108 const SmallVectorImpl<ISD::InputArg> &Ins,
111 SmallVectorImpl<SDValue> &InVals);
113 SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
114 CallingConv::ID CallConv, bool isVarArg,
115 const SmallVectorImpl<ISD::InputArg> &Ins,
116 DebugLoc dl, SelectionDAG &DAG,
117 SmallVectorImpl<SDValue> &InVals);
120 LowerFormalArguments(SDValue Chain,
121 CallingConv::ID CallConv, bool isVarArg,
122 const SmallVectorImpl<ISD::InputArg> &Ins,
123 DebugLoc dl, SelectionDAG &DAG,
124 SmallVectorImpl<SDValue> &InVals);
126 LowerCall(SDValue Chain, SDValue Callee,
127 CallingConv::ID CallConv, bool isVarArg, bool isTailCall,
128 const SmallVectorImpl<ISD::OutputArg> &Outs,
129 const SmallVectorImpl<ISD::InputArg> &Ins,
130 DebugLoc dl, SelectionDAG &DAG,
131 SmallVectorImpl<SDValue> &InVals);
134 LowerReturn(SDValue Chain,
135 CallingConv::ID CallConv, bool isVarArg,
136 const SmallVectorImpl<ISD::OutputArg> &Outs,
137 DebugLoc dl, SelectionDAG &DAG);
139 virtual bool getPostIndexedAddressParts(SDNode *N, SDNode *Op,
142 ISD::MemIndexedMode &AM,
143 SelectionDAG &DAG) const;
145 const MSP430Subtarget &Subtarget;
146 const MSP430TargetMachine &TM;
150 #endif // LLVM_TARGET_MSP430_ISELLOWERING_H