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.
30 /// CALL/TAILCALL - These operations represent an abstract call
31 /// instruction, which includes a bunch of information.
36 class SystemZSubtarget;
37 class SystemZTargetMachine;
39 class SystemZTargetLowering : public TargetLowering {
41 explicit SystemZTargetLowering(SystemZTargetMachine &TM);
43 /// LowerOperation - Provide custom lowering hooks for some operations.
44 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
46 /// getTargetNodeName - This method returns the name of a target specific
48 virtual const char *getTargetNodeName(unsigned Opcode) const;
50 SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
51 SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
52 SDValue LowerCALL(SDValue Op, SelectionDAG &DAG);
54 SDValue LowerCCCArguments(SDValue Op, SelectionDAG &DAG);
55 SDValue LowerCCCCallTo(SDValue Op, SelectionDAG &DAG, unsigned CC);
57 SDNode* LowerCallResult(SDValue Chain, SDValue InFlag,
59 unsigned CallingConv, SelectionDAG &DAG);
62 const SystemZSubtarget &Subtarget;
63 const SystemZTargetMachine &TM;
67 #endif // LLVM_TARGET_SystemZ_ISELLOWERING_H