SystemZISelLowering.h revision 4403b930f867f61b48304a23a6843026b0b9a32a 
1//==-- SystemZISelLowering.h - SystemZ 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 SystemZ uses to lower LLVM code into a
11// selection DAG.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_TARGET_SystemZ_ISELLOWERING_H
16#define LLVM_TARGET_SystemZ_ISELLOWERING_H
17
18#include "SystemZ.h"
19#include "llvm/CodeGen/SelectionDAG.h"
20#include "llvm/Target/TargetLowering.h"
21
22namespace llvm {
23  namespace SystemZISD {
24    enum {
25      FIRST_NUMBER = ISD::BUILTIN_OP_END
26    };
27  }
28
29  class SystemZSubtarget;
30  class SystemZTargetMachine;
31
32  class SystemZTargetLowering : public TargetLowering {
33  public:
34    explicit SystemZTargetLowering(SystemZTargetMachine &TM);
35
36    /// LowerOperation - Provide custom lowering hooks for some operations.
37    virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
38
39    /// getTargetNodeName - This method returns the name of a target specific
40    /// DAG node.
41    virtual const char *getTargetNodeName(unsigned Opcode) const;
42
43  private:
44    const SystemZSubtarget &Subtarget;
45    const SystemZTargetMachine &TM;
46  };
47} // namespace llvm
48
49#endif // LLVM_TARGET_SystemZ_ISELLOWERING_H
50