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 "SystemZRegisterInfo.h"
20 #include "llvm/CodeGen/SelectionDAG.h"
21 #include "llvm/Target/TargetLowering.h"
24 namespace SystemZISD {
26 FIRST_NUMBER = ISD::BUILTIN_OP_END,
28 /// Return with a flag operand. Operand 0 is the chain operand.
31 /// CALL/TAILCALL - These operations represent an abstract call
32 /// instruction, which includes a bunch of information.
41 class SystemZSubtarget;
42 class SystemZTargetMachine;
44 class SystemZTargetLowering : public TargetLowering {
46 explicit SystemZTargetLowering(SystemZTargetMachine &TM);
48 /// LowerOperation - Provide custom lowering hooks for some operations.
49 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
51 /// getTargetNodeName - This method returns the name of a target specific
53 virtual const char *getTargetNodeName(unsigned Opcode) const;
55 SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
56 SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
57 SDValue LowerCALL(SDValue Op, SelectionDAG &DAG);
58 SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG);
60 SDValue LowerCCCArguments(SDValue Op, SelectionDAG &DAG);
61 SDValue LowerCCCCallTo(SDValue Op, SelectionDAG &DAG, unsigned CC);
62 SDNode* LowerCallResult(SDValue Chain, SDValue InFlag,
64 unsigned CallingConv, SelectionDAG &DAG);
66 SDValue EmitCmp(SDValue LHS, SDValue RHS,
67 ISD::CondCode CC, SDValue &SystemZCC,
71 const SystemZSubtarget &Subtarget;
72 const SystemZTargetMachine &TM;
73 const SystemZRegisterInfo *RegInfo;
77 #endif // LLVM_TARGET_SystemZ_ISELLOWERING_H