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Mips16ISelLowering.h
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1 //===-- Mips16ISelLowering.h - Mips16 DAG Lowering Interface ----*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // Subclass of MipsTargetLowering specialized for mips16.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_MIPS_MIPS16ISELLOWERING_H
14 #define LLVM_LIB_TARGET_MIPS_MIPS16ISELLOWERING_H
15 
16 #include "MipsISelLowering.h"
17 
18 namespace llvm {
20  public:
21  explicit Mips16TargetLowering(const MipsTargetMachine &TM,
22  const MipsSubtarget &STI);
23 
24  bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace,
25  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
bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace, unsigned Align, MachineMemOperand::Flags Flags, bool *Fast) const override
Determine if the target supports unaligned memory accesses.
This class represents lattice values for constants.
Definition: AllocatorList.h:23
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 &#39;usesCustomInserter&#39; fla...
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: APFloat.h:41
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:46
Fast - This calling convention attempts to make calls as fast as possible (e.g.
Definition: CallingConv.h:42
std::vector< ArgListEntry > ArgListTy
Extended Value Type.
Definition: ValueTypes.h:33
This structure contains all information that is necessary for lowering calls.
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:40
CCState - This class holds information needed while lowering arguments and return values...
amdgpu Simplify well known AMD library false FunctionCallee Callee
Flags
Flags values. These may be or&#39;d together.
Representation of each machine instruction.
Definition: MachineInstr.h:63
MipsFunctionInfo - This class is derived from MachineFunction private Mips target-specific informatio...
IRTranslator LLVM IR MI
Unlike LLVM values, Selection DAG nodes may return multiple values as the result of a computation...
constexpr char Args[]
Key for Kernel::Metadata::mArgs.