Make the logic for determining function alignment more explicit. No functionality...
[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       FLUSHW       // FLUSH register windows to stack
41     };
42   }
43
44   class SparcTargetLowering : public TargetLowering {
45   public:
46     SparcTargetLowering(TargetMachine &TM);
47     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
48
49     /// computeMaskedBitsForTargetNode - Determine which of the bits specified
50     /// in Mask are known to be either zero or one and return them in the
51     /// KnownZero/KnownOne bitsets.
52     virtual void computeMaskedBitsForTargetNode(const SDValue Op,
53                                                 const APInt &Mask,
54                                                 APInt &KnownZero,
55                                                 APInt &KnownOne,
56                                                 const SelectionDAG &DAG,
57                                                 unsigned Depth = 0) const;
58
59     virtual MachineBasicBlock *
60       EmitInstrWithCustomInserter(MachineInstr *MI,
61                                   MachineBasicBlock *MBB) const;
62
63     virtual const char *getTargetNodeName(unsigned Opcode) const;
64
65     ConstraintType getConstraintType(const std::string &Constraint) const;
66     std::pair<unsigned, const TargetRegisterClass*>
67     getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const;
68     std::vector<unsigned>
69     getRegClassForInlineAsmConstraint(const std::string &Constraint,
70                                       EVT VT) const;
71
72     virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
73
74     virtual SDValue
75       LowerFormalArguments(SDValue Chain,
76                            CallingConv::ID CallConv,
77                            bool isVarArg,
78                            const SmallVectorImpl<ISD::InputArg> &Ins,
79                            DebugLoc dl, SelectionDAG &DAG,
80                            SmallVectorImpl<SDValue> &InVals) const;
81
82     virtual SDValue
83       LowerCall(SDValue Chain, SDValue Callee,
84                 CallingConv::ID CallConv, bool isVarArg,
85                 bool &isTailCall,
86                 const SmallVectorImpl<ISD::OutputArg> &Outs,
87                 const SmallVectorImpl<SDValue> &OutVals,
88                 const SmallVectorImpl<ISD::InputArg> &Ins,
89                 DebugLoc dl, SelectionDAG &DAG,
90                 SmallVectorImpl<SDValue> &InVals) const;
91
92     virtual SDValue
93       LowerReturn(SDValue Chain,
94                   CallingConv::ID CallConv, bool isVarArg,
95                   const SmallVectorImpl<ISD::OutputArg> &Outs,
96                   const SmallVectorImpl<SDValue> &OutVals,
97                   DebugLoc dl, SelectionDAG &DAG) const;
98
99     SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
100     SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
101
102     unsigned getSRetArgSize(SelectionDAG &DAG, SDValue Callee) const;
103   };
104 } // end namespace llvm
105
106 #endif    // SPARC_ISELLOWERING_H