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     int VarArgsFrameOffset;   // Frame offset to start of varargs area.
  45   public:
  46     SparcTargetLowering(TargetMachine &TM);
  47     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
  48
  49     int getVarArgsFrameOffset() const { return VarArgsFrameOffset; }
  50
  51     /// computeMaskedBitsForTargetNode - Determine which of the bits specified
  52     /// in Mask are known to be either zero or one and return them in the
  53     /// KnownZero/KnownOne bitsets.
  54     virtual void computeMaskedBitsForTargetNode(const SDValue Op,
  55                                                 const APInt &Mask,
  56                                                 APInt &KnownZero,
  57                                                 APInt &KnownOne,
  58                                                 const SelectionDAG &DAG,
  59                                                 unsigned Depth = 0) const;
  60
  61     virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
  62                                                    MachineBasicBlock *MBB) const;
  63
  64     virtual const char *getTargetNodeName(unsigned Opcode) const;
  65
  66     ConstraintType getConstraintType(const std::string &Constraint) const;
  67     std::pair<unsigned, const TargetRegisterClass*>
  68     getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const;
  69     std::vector<unsigned>
  70     getRegClassForInlineAsmConstraint(const std::string &Constraint,
  71                                       EVT VT) const;
  72
  73     virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
  74
  75     /// getFunctionAlignment - Return the Log2 alignment of this function.
  76     virtual unsigned getFunctionAlignment(const Function *F) const;
  77
  78     virtual SDValue
  79       LowerFormalArguments(SDValue Chain,
  80                            CallingConv::ID CallConv,
  81                            bool isVarArg,
  82                            const SmallVectorImpl<ISD::InputArg> &Ins,
  83                            DebugLoc dl, SelectionDAG &DAG,
  84                            SmallVectorImpl<SDValue> &InVals);
  85
  86     virtual SDValue
  87       LowerCall(SDValue Chain, SDValue Callee,
  88                 CallingConv::ID CallConv, bool isVarArg,
  89                 bool isTailCall,
  90                 const SmallVectorImpl<ISD::OutputArg> &Outs,
  91                 const SmallVectorImpl<ISD::InputArg> &Ins,
  92                 DebugLoc dl, SelectionDAG &DAG,
  93                 SmallVectorImpl<SDValue> &InVals);
  94
  95     virtual SDValue
  96       LowerReturn(SDValue Chain,
  97                   CallingConv::ID CallConv, bool isVarArg,
  98                   const SmallVectorImpl<ISD::OutputArg> &Outs,
  99                   DebugLoc dl, SelectionDAG &DAG);
 100
 101     SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
 102     SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG);
 103   };
 104 } // end namespace llvm
 105
 106 #endif    // SPARC_ISELLOWERING_H