LLVM  4.0.0
Mips16ISelLowering.h
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1 //===-- Mips16ISelLowering.h - Mips16 DAG Lowering Interface ----*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Subclass of MipsTargetLowering specialized for mips16.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_MIPS_MIPS16ISELLOWERING_H
15 #define LLVM_LIB_TARGET_MIPS_MIPS16ISELLOWERING_H
16 
17 #include "MipsISelLowering.h"
18 
19 namespace llvm {
21  public:
22  explicit Mips16TargetLowering(const MipsTargetMachine &TM,
23  const MipsSubtarget &STI);
24 
25  bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace,
26  unsigned Align,
27  bool *Fast) const override;
28 
31  MachineBasicBlock *MBB) const override;
32 
33  private:
34  bool isEligibleForTailCallOptimization(
35  const CCState &CCInfo, unsigned NextStackOffset,
36  const MipsFunctionInfo &FI) const override;
37 
38  void setMips16HardFloatLibCalls();
39 
40  unsigned int
41  getMips16HelperFunctionStubNumber(ArgListTy &Args) const;
42 
43  const char *getMips16HelperFunction
44  (Type* RetTy, ArgListTy &Args, bool &needHelper) const;
45 
46  void
47  getOpndList(SmallVectorImpl<SDValue> &Ops,
48  std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
49  bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
50  bool IsCallReloc, CallLoweringInfo &CLI, SDValue Callee,
51  SDValue Chain) const override;
52 
53  MachineBasicBlock *emitSel16(unsigned Opc, MachineInstr &MI,
54  MachineBasicBlock *BB) const;
55 
56  MachineBasicBlock *emitSeliT16(unsigned Opc1, unsigned Opc2,
57  MachineInstr &MI,
58  MachineBasicBlock *BB) const;
59 
60  MachineBasicBlock *emitSelT16(unsigned Opc1, unsigned Opc2,
61  MachineInstr &MI,
62  MachineBasicBlock *BB) const;
63 
64  MachineBasicBlock *emitFEXT_T8I816_ins(unsigned BtOpc, unsigned CmpOpc,
65  MachineInstr &MI,
66  MachineBasicBlock *BB) const;
67 
68  MachineBasicBlock *emitFEXT_T8I8I16_ins(unsigned BtOpc, unsigned CmpiOpc,
69  unsigned CmpiXOpc, bool ImmSigned,
70  MachineInstr &MI,
71  MachineBasicBlock *BB) const;
72 
73  MachineBasicBlock *emitFEXT_CCRX16_ins(unsigned SltOpc, MachineInstr &MI,
74  MachineBasicBlock *BB) const;
75 
76  MachineBasicBlock *emitFEXT_CCRXI16_ins(unsigned SltiOpc, unsigned SltiXOpc,
77  MachineInstr &MI,
78  MachineBasicBlock *BB) const;
79  };
80 }
81 
82 #endif
Mips16TargetLowering(const MipsTargetMachine &TM, const MipsSubtarget &STI)
MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr &MI, MachineBasicBlock *MBB) const override
This method should be implemented by targets that mark instructions with the 'usesCustomInserter' fla...
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: APFloat.h:32
MachineBasicBlock * MBB
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:45
EVT - Extended Value Type.
Definition: ValueTypes.h:31
std::vector< ArgListEntry > ArgListTy
This structure contains all information that is necessary for lowering calls.
CCState - This class holds information needed while lowering arguments and return values...
Representation of each machine instruction.
Definition: MachineInstr.h:52
MipsFunctionInfo - This class is derived from MachineFunction private Mips target-specific informatio...
IRTranslator LLVM IR MI
bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace, unsigned Align, bool *Fast) const override
Determine if the target supports unaligned memory accesses.
Unlike LLVM values, Selection DAG nodes may return multiple values as the result of a computation...
Fast - This calling convention attempts to make calls as fast as possible (e.g.
Definition: CallingConv.h:42