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     };
  40   }
  41
  42   class SparcTargetLowering : public TargetLowering {
  43     int VarArgsFrameOffset;   // Frame offset to start of varargs area.
  44   public:
  45     SparcTargetLowering(TargetMachine &TM);
  46     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
  47
  48     int getVarArgsFrameOffset() const { return VarArgsFrameOffset; }
  49
  50     /// computeMaskedBitsForTargetNode - Determine which of the bits specified
  51     /// in Mask are known to be either zero or one and return them in the
  52     /// KnownZero/KnownOne bitsets.
  53     virtual void computeMaskedBitsForTargetNode(const SDValue Op,
  54                                                 const APInt &Mask,
  55                                                 APInt &KnownZero,
  56                                                 APInt &KnownOne,
  57                                                 const SelectionDAG &DAG,
  58                                                 unsigned Depth = 0) const;
  59
  60     virtual void LowerArguments(Function &F, SelectionDAG &DAG,
  61                                 SmallVectorImpl<SDValue> &ArgValues,
  62                                 DebugLoc dl);
  63     virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
  64                                                    MachineBasicBlock *MBB) const;
  65
  66     virtual const char *getTargetNodeName(unsigned Opcode) const;
  67
  68     ConstraintType getConstraintType(const std::string &Constraint) const;
  69     std::pair<unsigned, const TargetRegisterClass*>
  70     getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const;
  71     std::vector<unsigned>
  72     getRegClassForInlineAsmConstraint(const std::string &Constraint,
  73                                       MVT VT) const;
  74
  75     virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
  76   };
  77 } // end namespace llvm
  78
  79 #endif    // SPARC_ISELLOWERING_H