1 //===-- MBlazeISelLowering.h - MBlaze 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 MBlaze uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef MBlazeISELLOWERING_H
16 #define MBlazeISELLOWERING_H
18 #include "llvm/Support/ErrorHandling.h"
19 #include "llvm/CodeGen/SelectionDAG.h"
20 #include "llvm/Target/TargetLowering.h"
22 #include "MBlazeSubtarget.h"
36 inline static CC getOppositeCondition(CC cc) {
38 default: llvm_unreachable("Unknown condition code");
48 inline static const char *MBlazeCCToString(CC cc) {
50 default: llvm_unreachable("Unknown condition code");
63 // Start the numbering from where ISD NodeType finishes.
64 FIRST_NUMBER = ISD::BUILTIN_OP_END,
66 // Jump and link (call)
69 // Handle gp_rel (small data/bss sections) relocation.
72 // Select CC Pseudo Instruction
75 // Wrap up multiple types of instructions
86 //===--------------------------------------------------------------------===//
87 // TargetLowering Implementation
88 //===--------------------------------------------------------------------===//
90 class MBlazeTargetLowering : public TargetLowering {
92 explicit MBlazeTargetLowering(MBlazeTargetMachine &TM);
94 /// LowerOperation - Provide custom lowering hooks for some operations.
95 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
97 /// getTargetNodeName - This method returns the name of a target specific
99 virtual const char *getTargetNodeName(unsigned Opcode) const;
101 /// getSetCCResultType - get the ISD::SETCC result ValueType
102 MVT::SimpleValueType getSetCCResultType(EVT VT) const;
104 virtual unsigned getFunctionAlignment(const Function *F) const;
107 const MBlazeSubtarget *Subtarget;
110 // Lower Operand helpers
111 SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
112 CallingConv::ID CallConv, bool isVarArg,
113 const SmallVectorImpl<ISD::InputArg> &Ins,
114 DebugLoc dl, SelectionDAG &DAG,
115 SmallVectorImpl<SDValue> &InVals) const;
117 // Lower Operand specifics
118 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
119 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
120 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
121 SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const;
122 SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
123 SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const;
126 LowerFormalArguments(SDValue Chain,
127 CallingConv::ID CallConv, bool isVarArg,
128 const SmallVectorImpl<ISD::InputArg> &Ins,
129 DebugLoc dl, SelectionDAG &DAG,
130 SmallVectorImpl<SDValue> &InVals) const;
133 LowerCall(SDValue Chain, SDValue Callee,
134 CallingConv::ID CallConv, bool isVarArg,
136 const SmallVectorImpl<ISD::OutputArg> &Outs,
137 const SmallVectorImpl<SDValue> &OutVals,
138 const SmallVectorImpl<ISD::InputArg> &Ins,
139 DebugLoc dl, SelectionDAG &DAG,
140 SmallVectorImpl<SDValue> &InVals) const;
143 LowerReturn(SDValue Chain,
144 CallingConv::ID CallConv, bool isVarArg,
145 const SmallVectorImpl<ISD::OutputArg> &Outs,
146 const SmallVectorImpl<SDValue> &OutVals,
147 DebugLoc dl, SelectionDAG &DAG) const;
149 virtual MachineBasicBlock *
150 EmitInstrWithCustomInserter(MachineInstr *MI,
151 MachineBasicBlock *MBB) const;
153 // Inline asm support
154 ConstraintType getConstraintType(const std::string &Constraint) const;
156 std::pair<unsigned, const TargetRegisterClass*>
157 getRegForInlineAsmConstraint(const std::string &Constraint,
160 std::vector<unsigned>
161 getRegClassForInlineAsmConstraint(const std::string &Constraint,
164 virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
166 /// isFPImmLegal - Returns true if the target can instruction select the
167 /// specified FP immediate natively. If false, the legalizer will
168 /// materialize the FP immediate as a load from a constant pool.
169 virtual bool isFPImmLegal(const APFloat &Imm, EVT VT) const;
173 #endif // MBlazeISELLOWERING_H