1 //===-- MipsISelLowering.h - Mips 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 Mips uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef MipsISELLOWERING_H
16 #define MipsISELLOWERING_H
18 #include "llvm/CodeGen/SelectionDAG.h"
19 #include "llvm/Target/TargetLowering.h"
21 #include "MipsSubtarget.h"
26 // Start the numbering from where ISD NodeType finishes.
27 FIRST_NUMBER = ISD::BUILTIN_OP_END,
29 // Jump and link (call)
32 // Get the Higher 16 bits from a 32-bit immediate
33 // No relation with Mips Hi register
36 // Get the Lower 16 bits from a 32-bit immediate
37 // No relation with Mips Lo register
40 // Handle gp_rel (small data/bss sections) relocation.
43 // Select CC Pseudo Instruction
46 // Floating Point Select CC Pseudo Instruction
49 // Floating Point Branch Conditional
52 // Floating Point Compare
55 // Floating Point Rounding
63 //===--------------------------------------------------------------------===//
64 // TargetLowering Implementation
65 //===--------------------------------------------------------------------===//
67 class MipsTargetLowering : public TargetLowering {
69 explicit MipsTargetLowering(MipsTargetMachine &TM);
71 /// LowerOperation - Provide custom lowering hooks for some operations.
72 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
74 /// getTargetNodeName - This method returns the name of a target specific
76 virtual const char *getTargetNodeName(unsigned Opcode) const;
78 /// getSetCCResultType - get the ISD::SETCC result ValueType
79 MVT::SimpleValueType getSetCCResultType(EVT VT) const;
81 /// getFunctionAlignment - Return the Log2 alignment of this function.
82 virtual unsigned getFunctionAlignment(const Function *F) const;
85 const MipsSubtarget *Subtarget;
88 // Lower Operand helpers
89 SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
90 CallingConv::ID CallConv, bool isVarArg,
91 const SmallVectorImpl<ISD::InputArg> &Ins,
92 DebugLoc dl, SelectionDAG &DAG,
93 SmallVectorImpl<SDValue> &InVals) const;
95 // Lower Operand specifics
96 SDValue LowerANDOR(SDValue Op, SelectionDAG &DAG) const;
97 SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
98 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
99 SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const;
100 SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) const;
101 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
102 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
103 SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const;
104 SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
105 SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const;
106 SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const;
109 LowerFormalArguments(SDValue Chain,
110 CallingConv::ID CallConv, bool isVarArg,
111 const SmallVectorImpl<ISD::InputArg> &Ins,
112 DebugLoc dl, SelectionDAG &DAG,
113 SmallVectorImpl<SDValue> &InVals) const;
116 LowerCall(SDValue Chain, SDValue Callee,
117 CallingConv::ID CallConv, bool isVarArg,
119 const SmallVectorImpl<ISD::OutputArg> &Outs,
120 const SmallVectorImpl<SDValue> &OutVals,
121 const SmallVectorImpl<ISD::InputArg> &Ins,
122 DebugLoc dl, SelectionDAG &DAG,
123 SmallVectorImpl<SDValue> &InVals) const;
126 LowerReturn(SDValue Chain,
127 CallingConv::ID CallConv, bool isVarArg,
128 const SmallVectorImpl<ISD::OutputArg> &Outs,
129 const SmallVectorImpl<SDValue> &OutVals,
130 DebugLoc dl, SelectionDAG &DAG) const;
132 virtual MachineBasicBlock *
133 EmitInstrWithCustomInserter(MachineInstr *MI,
134 MachineBasicBlock *MBB) const;
136 // Inline asm support
137 ConstraintType getConstraintType(const std::string &Constraint) const;
139 /// Examine constraint string and operand type and determine a weight value.
140 /// The operand object must already have been set up with the operand type.
141 ConstraintWeight getSingleConstraintMatchWeight(
142 AsmOperandInfo &info, const char *constraint) const;
144 std::pair<unsigned, const TargetRegisterClass*>
145 getRegForInlineAsmConstraint(const std::string &Constraint,
148 std::vector<unsigned>
149 getRegClassForInlineAsmConstraint(const std::string &Constraint,
152 virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
154 /// isFPImmLegal - Returns true if the target can instruction select the
155 /// specified FP immediate natively. If false, the legalizer will
156 /// materialize the FP immediate as a load from a constant pool.
157 virtual bool isFPImmLegal(const APFloat &Imm, EVT VT) const;
161 #endif // MipsISELLOWERING_H