Retype from unsigned to CallingConv::ID accordingly. Approved by Bob Wilson.
[oota-llvm.git] / lib / Target / MSP430 / MSP430ISelLowering.h
1 //==-- MSP430ISelLowering.h - MSP430 DAG Lowering Interface ------*- C++ -*-==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the interfaces that MSP430 uses to lower LLVM code into a
11 // selection DAG.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #ifndef LLVM_TARGET_MSP430_ISELLOWERING_H
16 #define LLVM_TARGET_MSP430_ISELLOWERING_H
17
18 #include "MSP430.h"
19 #include "llvm/CodeGen/SelectionDAG.h"
20 #include "llvm/Target/TargetLowering.h"
21
22 namespace llvm {
23   namespace MSP430ISD {
24     enum {
25       FIRST_NUMBER = ISD::BUILTIN_OP_END,
26
27       /// Return with a flag operand. Operand 0 is the chain operand.
28       RET_FLAG,
29
30       /// Y = R{R,L}A X, rotate right (left) arithmetically
31       RRA, RLA,
32
33       /// Y = RRC X, rotate right via carry
34       RRC,
35
36       /// CALL - These operations represent an abstract call
37       /// instruction, which includes a bunch of information.
38       CALL,
39
40       /// Wrapper - A wrapper node for TargetConstantPool, TargetExternalSymbol,
41       /// and TargetGlobalAddress.
42       Wrapper,
43
44       /// CMP - Compare instruction.
45       CMP,
46
47       /// SetCC. Operand 0 is condition code, and operand 1 is the flag
48       /// operand produced by a CMP instruction.
49       SETCC,
50
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
54       /// instruction.
55       BR_CC,
56
57       /// SELECT_CC. Operand 0 and operand 1 are selection variable, operand 3
58       /// is condition code and operand 4 is flag operand.
59       SELECT_CC
60     };
61   }
62
63   class MSP430Subtarget;
64   class MSP430TargetMachine;
65
66   class MSP430TargetLowering : public TargetLowering {
67   public:
68     explicit MSP430TargetLowering(MSP430TargetMachine &TM);
69
70     /// LowerOperation - Provide custom lowering hooks for some operations.
71     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
72
73     /// getTargetNodeName - This method returns the name of a target specific
74     /// DAG node.
75     virtual const char *getTargetNodeName(unsigned Opcode) const;
76
77     /// getFunctionAlignment - Return the Log2 alignment of this function.
78     virtual unsigned getFunctionAlignment(const Function *F) const;
79
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);
86
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;
91
92     MachineBasicBlock* EmitInstrWithCustomInserter(MachineInstr *MI,
93                                                    MachineBasicBlock *BB) const;
94
95   private:
96     SDValue LowerCCCCallTo(SDValue Chain, SDValue Callee,
97                            CallingConv::ID CallConv, bool isVarArg,
98                            bool isTailCall,
99                            const SmallVectorImpl<ISD::OutputArg> &Outs,
100                            const SmallVectorImpl<ISD::InputArg> &Ins,
101                            DebugLoc dl, SelectionDAG &DAG,
102                            SmallVectorImpl<SDValue> &InVals);
103
104     SDValue LowerCCCArguments(SDValue Chain,
105                               CallingConv::ID CallConv,
106                               bool isVarArg,
107                               const SmallVectorImpl<ISD::InputArg> &Ins,
108                               DebugLoc dl,
109                               SelectionDAG &DAG,
110                               SmallVectorImpl<SDValue> &InVals);
111
112     SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
113                             CallingConv::ID CallConv, bool isVarArg,
114                             const SmallVectorImpl<ISD::InputArg> &Ins,
115                             DebugLoc dl, SelectionDAG &DAG,
116                             SmallVectorImpl<SDValue> &InVals);
117
118     virtual SDValue
119       LowerFormalArguments(SDValue Chain,
120                            CallingConv::ID CallConv, bool isVarArg,
121                            const SmallVectorImpl<ISD::InputArg> &Ins,
122                            DebugLoc dl, SelectionDAG &DAG,
123                            SmallVectorImpl<SDValue> &InVals);
124     virtual SDValue
125       LowerCall(SDValue Chain, SDValue Callee,
126                 CallingConv::ID CallConv, bool isVarArg, bool isTailCall,
127                 const SmallVectorImpl<ISD::OutputArg> &Outs,
128                 const SmallVectorImpl<ISD::InputArg> &Ins,
129                 DebugLoc dl, SelectionDAG &DAG,
130                 SmallVectorImpl<SDValue> &InVals);
131
132     virtual SDValue
133       LowerReturn(SDValue Chain,
134                   CallingConv::ID CallConv, bool isVarArg,
135                   const SmallVectorImpl<ISD::OutputArg> &Outs,
136                   DebugLoc dl, SelectionDAG &DAG);
137
138     const MSP430Subtarget &Subtarget;
139     const MSP430TargetMachine &TM;
140   };
141 } // namespace llvm
142
143 #endif // LLVM_TARGET_MSP430_ISELLOWERING_H