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 - These operations represent an abstract call
32 /// instruction, which includes a bunch of information.
35 /// PCRelativeWrapper - PC relative address
38 /// CMP, UCMP - Compare instruction
42 /// BRCOND - Conditional branch. Operand 0 is chain operand, operand 1 is
43 /// the block to branch if condition is true, operand 2 is condition code
44 /// and operand 3 is the flag operand produced by a CMP instruction.
47 /// SELECT - Operands 0 and 1 are selection variables, operand 2 is
48 /// condition code and operand 3 is the flag operand.
53 class SystemZSubtarget;
54 class SystemZTargetMachine;
56 class SystemZTargetLowering : public TargetLowering {
58 explicit SystemZTargetLowering(SystemZTargetMachine &TM);
60 /// LowerOperation - Provide custom lowering hooks for some operations.
61 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
63 /// getTargetNodeName - This method returns the name of a target specific
65 virtual const char *getTargetNodeName(unsigned Opcode) const;
67 /// getFunctionAlignment - Return the Log2 alignment of this function.
68 virtual unsigned getFunctionAlignment(const Function *F) const {
72 SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG);
73 SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG);
74 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
75 SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG);
76 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG);
78 SDValue EmitCmp(SDValue LHS, SDValue RHS,
79 ISD::CondCode CC, SDValue &SystemZCC,
83 MachineBasicBlock* EmitInstrWithCustomInserter(MachineInstr *MI,
84 MachineBasicBlock *BB) const;
87 SDValue LowerCCCCallTo(SDValue Chain, SDValue Callee,
88 unsigned CallConv, bool isVarArg,
90 const SmallVectorImpl<ISD::OutputArg> &Outs,
91 const SmallVectorImpl<ISD::InputArg> &Ins,
92 DebugLoc dl, SelectionDAG &DAG,
93 SmallVectorImpl<SDValue> &InVals);
95 SDValue LowerCCCArguments(SDValue Chain,
98 const SmallVectorImpl<ISD::InputArg> &Ins,
101 SmallVectorImpl<SDValue> &InVals);
103 SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
104 unsigned CallConv, bool isVarArg,
105 const SmallVectorImpl<ISD::InputArg> &Ins,
106 DebugLoc dl, SelectionDAG &DAG,
107 SmallVectorImpl<SDValue> &InVals);
110 LowerFormalArguments(SDValue Chain,
111 unsigned CallConv, bool isVarArg,
112 const SmallVectorImpl<ISD::InputArg> &Ins,
113 DebugLoc dl, SelectionDAG &DAG,
114 SmallVectorImpl<SDValue> &InVals);
116 LowerCall(SDValue Chain, SDValue Callee,
117 unsigned CallConv, bool isVarArg, bool isTailCall,
118 const SmallVectorImpl<ISD::OutputArg> &Outs,
119 const SmallVectorImpl<ISD::InputArg> &Ins,
120 DebugLoc dl, SelectionDAG &DAG,
121 SmallVectorImpl<SDValue> &InVals);
124 LowerReturn(SDValue Chain,
125 unsigned CallConv, bool isVarArg,
126 const SmallVectorImpl<ISD::OutputArg> &Outs,
127 DebugLoc dl, SelectionDAG &DAG);
129 const SystemZSubtarget &Subtarget;
130 const SystemZTargetMachine &TM;
131 const SystemZRegisterInfo *RegInfo;
135 #endif // LLVM_TARGET_SystemZ_ISELLOWERING_H