Start moving TargetLowering away from using full MVTs and towards SimpleValueType...
[oota-llvm.git] / lib / Target / Blackfin / BlackfinISelLowering.h
1 //===- BlackfinISelLowering.h - Blackfin 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 Blackfin uses to lower LLVM code into a
11 // selection DAG.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #ifndef BLACKFIN_ISELLOWERING_H
16 #define BLACKFIN_ISELLOWERING_H
17
18 #include "llvm/Target/TargetLowering.h"
19 #include "Blackfin.h"
20
21 namespace llvm {
22
23   namespace BFISD {
24     enum {
25       FIRST_NUMBER = ISD::BUILTIN_OP_END,
26       CALL,                     // A call instruction.
27       RET_FLAG,                 // Return with a flag operand.
28       Wrapper                   // Address wrapper
29     };
30   }
31
32   class BlackfinTargetLowering : public TargetLowering {
33     int VarArgsFrameOffset;   // Frame offset to start of varargs area.
34   public:
35     BlackfinTargetLowering(TargetMachine &TM);
36     virtual MVT::SimpleValueType getSetCCResultType(MVT VT) const;
37     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
38     virtual void ReplaceNodeResults(SDNode *N,
39                                     SmallVectorImpl<SDValue> &Results,
40                                     SelectionDAG &DAG);
41
42     int getVarArgsFrameOffset() const { return VarArgsFrameOffset; }
43
44     ConstraintType getConstraintType(const std::string &Constraint) const;
45     std::pair<unsigned, const TargetRegisterClass*>
46     getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const;
47     std::vector<unsigned>
48     getRegClassForInlineAsmConstraint(const std::string &Constraint,
49                                       MVT VT) const;
50     virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
51     const char *getTargetNodeName(unsigned Opcode) const;
52     unsigned getFunctionAlignment(const Function *F) const;
53
54   private:
55     SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
56     SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG);
57     SDValue LowerADDE(SDValue Op, SelectionDAG &DAG);
58
59     virtual SDValue
60       LowerFormalArguments(SDValue Chain,
61                            unsigned CallConv, bool isVarArg,
62                            const SmallVectorImpl<ISD::InputArg> &Ins,
63                            DebugLoc dl, SelectionDAG &DAG,
64                            SmallVectorImpl<SDValue> &InVals);
65     virtual SDValue
66       LowerCall(SDValue Chain, SDValue Callee,
67                 unsigned CallConv, bool isVarArg, bool isTailCall,
68                 const SmallVectorImpl<ISD::OutputArg> &Outs,
69                 const SmallVectorImpl<ISD::InputArg> &Ins,
70                 DebugLoc dl, SelectionDAG &DAG,
71                 SmallVectorImpl<SDValue> &InVals);
72
73     virtual SDValue
74       LowerReturn(SDValue Chain,
75                   unsigned CallConv, bool isVarArg,
76                   const SmallVectorImpl<ISD::OutputArg> &Outs,
77                   DebugLoc dl, SelectionDAG &DAG);
78   };
79 } // end namespace llvm
80
81 #endif    // BLACKFIN_ISELLOWERING_H