1 //==-- SystemZISelLowering.h - SystemZ DAG Lowering Interface ----*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that SystemZ uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_TARGET_SystemZ_ISELLOWERING_H
16 #define LLVM_TARGET_SystemZ_ISELLOWERING_H
19 #include "llvm/CodeGen/SelectionDAG.h"
20 #include "llvm/Target/TargetLowering.h"
23 namespace SystemZISD {
25 FIRST_NUMBER = ISD::BUILTIN_OP_END,
27 /// Return with a flag operand. Operand 0 is the chain operand.
32 class SystemZSubtarget;
33 class SystemZTargetMachine;
35 class SystemZTargetLowering : public TargetLowering {
37 explicit SystemZTargetLowering(SystemZTargetMachine &TM);
39 /// LowerOperation - Provide custom lowering hooks for some operations.
40 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
42 /// getTargetNodeName - This method returns the name of a target specific
44 virtual const char *getTargetNodeName(unsigned Opcode) const;
46 SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
47 SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
48 SDValue LowerCCCArguments(SDValue Op, SelectionDAG &DAG);
50 SDNode* LowerCallResult(SDValue Chain, SDValue InFlag,
52 unsigned CallingConv, SelectionDAG &DAG);
55 const SystemZSubtarget &Subtarget;
56 const SystemZTargetMachine &TM;
60 #endif // LLVM_TARGET_SystemZ_ISELLOWERING_H