Split the SDValue out of OutputArg so that SelectionDAG-independent
[oota-llvm.git] / lib / Target / Sparc / SparcISelLowering.h
1 //===-- SparcISelLowering.h - Sparc 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 Sparc uses to lower LLVM code into a
11 // selection DAG.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #ifndef SPARC_ISELLOWERING_H
16 #define SPARC_ISELLOWERING_H
17
18 #include "llvm/Target/TargetLowering.h"
19 #include "Sparc.h"
20
21 namespace llvm {
22   namespace SPISD {
23     enum {
24       FIRST_NUMBER = ISD::BUILTIN_OP_END,
25       CMPICC,      // Compare two GPR operands, set icc.
26       CMPFCC,      // Compare two FP operands, set fcc.
27       BRICC,       // Branch to dest on icc condition
28       BRFCC,       // Branch to dest on fcc condition
29       SELECT_ICC,  // Select between two values using the current ICC flags.
30       SELECT_FCC,  // Select between two values using the current FCC flags.
31
32       Hi, Lo,      // Hi/Lo operations, typically on a global address.
33
34       FTOI,        // FP to Int within a FP register.
35       ITOF,        // Int to FP within a FP register.
36
37       CALL,        // A call instruction.
38       RET_FLAG,    // Return with a flag operand.
39       GLOBAL_BASE_REG // Global base reg for PIC
40     };
41   }
42
43   class SparcTargetLowering : public TargetLowering {
44   public:
45     SparcTargetLowering(TargetMachine &TM);
46     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
47
48     /// computeMaskedBitsForTargetNode - Determine which of the bits specified
49     /// in Mask are known to be either zero or one and return them in the
50     /// KnownZero/KnownOne bitsets.
51     virtual void computeMaskedBitsForTargetNode(const SDValue Op,
52                                                 const APInt &Mask,
53                                                 APInt &KnownZero,
54                                                 APInt &KnownOne,
55                                                 const SelectionDAG &DAG,
56                                                 unsigned Depth = 0) const;
57
58     virtual MachineBasicBlock *
59       EmitInstrWithCustomInserter(MachineInstr *MI,
60                                   MachineBasicBlock *MBB) const;
61
62     virtual const char *getTargetNodeName(unsigned Opcode) const;
63
64     ConstraintType getConstraintType(const std::string &Constraint) const;
65     std::pair<unsigned, const TargetRegisterClass*>
66     getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const;
67     std::vector<unsigned>
68     getRegClassForInlineAsmConstraint(const std::string &Constraint,
69                                       EVT VT) const;
70
71     virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
72
73     /// getFunctionAlignment - Return the Log2 alignment of this function.
74     virtual unsigned getFunctionAlignment(const Function *F) const;
75
76     virtual SDValue
77       LowerFormalArguments(SDValue Chain,
78                            CallingConv::ID CallConv,
79                            bool isVarArg,
80                            const SmallVectorImpl<ISD::InputArg> &Ins,
81                            DebugLoc dl, SelectionDAG &DAG,
82                            SmallVectorImpl<SDValue> &InVals) const;
83
84     virtual SDValue
85       LowerCall(SDValue Chain, SDValue Callee,
86                 CallingConv::ID CallConv, bool isVarArg,
87                 bool &isTailCall,
88                 const SmallVectorImpl<ISD::OutputArg> &Outs,
89                 const SmallVectorImpl<SDValue> &OutVals,
90                 const SmallVectorImpl<ISD::InputArg> &Ins,
91                 DebugLoc dl, SelectionDAG &DAG,
92                 SmallVectorImpl<SDValue> &InVals) const;
93
94     virtual SDValue
95       LowerReturn(SDValue Chain,
96                   CallingConv::ID CallConv, bool isVarArg,
97                   const SmallVectorImpl<ISD::OutputArg> &Outs,
98                   const SmallVectorImpl<SDValue> &OutVals,
99                   DebugLoc dl, SelectionDAG &DAG) const;
100
101     SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
102     SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
103   };
104 } // end namespace llvm
105
106 #endif    // SPARC_ISELLOWERING_H