LLVM  10.0.0svn
AArch64TargetStreamer.h
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1 //===-- AArch64TargetStreamer.h - AArch64 Target Streamer ------*- 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 #ifndef LLVM_LIB_TARGET_AARCH64_MCTARGETDESC_AARCH64TARGETSTREAMER_H
10 #define LLVM_LIB_TARGET_AARCH64_MCTARGETDESC_AARCH64TARGETSTREAMER_H
11 
12 #include "llvm/MC/MCStreamer.h"
13 
14 namespace {
15 class AArch64ELFStreamer;
16 }
17 
18 namespace llvm {
19 
21 public:
23  ~AArch64TargetStreamer() override;
24 
25  void finish() override;
26 
27  /// Callback used to implement the ldr= pseudo.
28  /// Add a new entry to the constant pool for the current section and return an
29  /// MCExpr that can be used to refer to the constant pool location.
30  const MCExpr *addConstantPoolEntry(const MCExpr *, unsigned Size, SMLoc Loc);
31 
32  /// Callback used to implemnt the .ltorg directive.
33  /// Emit contents of constant pool for the current section.
35 
36  /// Callback used to implement the .inst directive.
37  virtual void emitInst(uint32_t Inst);
38 
39  virtual void EmitARM64WinCFIAllocStack(unsigned Size) {}
40  virtual void EmitARM64WinCFISaveFPLR(int Offset) {}
41  virtual void EmitARM64WinCFISaveFPLRX(int Offset) {}
42  virtual void EmitARM64WinCFISaveReg(unsigned Reg, int Offset) {}
43  virtual void EmitARM64WinCFISaveRegX(unsigned Reg, int Offset) {}
44  virtual void EmitARM64WinCFISaveRegP(unsigned Reg, int Offset) {}
45  virtual void EmitARM64WinCFISaveRegPX(unsigned Reg, int Offset) {}
46  virtual void EmitARM64WinCFISaveFReg(unsigned Reg, int Offset) {}
47  virtual void EmitARM64WinCFISaveFRegX(unsigned Reg, int Offset) {}
48  virtual void EmitARM64WinCFISaveFRegP(unsigned Reg, int Offset) {}
49  virtual void EmitARM64WinCFISaveFRegPX(unsigned Reg, int Offset) {}
50  virtual void EmitARM64WinCFISetFP() {}
51  virtual void EmitARM64WinCFIAddFP(unsigned Size) {}
52  virtual void EmitARM64WinCFINop() {}
53  virtual void EmitARM64WinCFIPrologEnd() {}
54  virtual void EmitARM64WinCFIEpilogStart() {}
55  virtual void EmitARM64WinCFIEpilogEnd() {}
56 
57 private:
58  std::unique_ptr<AssemblerConstantPools> ConstantPools;
59 };
60 
62 private:
63  AArch64ELFStreamer &getStreamer();
64 
65  void emitInst(uint32_t Inst) override;
66 
67 public:
69 };
70 
72 private:
73  // True if we are processing SEH directives in an epilogue.
74  bool InEpilogCFI = false;
75 
76  // Symbol of the current epilog for which we are processing SEH directives.
77  MCSymbol *CurrentEpilog = nullptr;
78 public:
80  : AArch64TargetStreamer(S) {}
81 
82  // The unwind codes on ARM64 Windows are documented at
83  // https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling
84  void EmitARM64WinCFIAllocStack(unsigned Size) override;
85  void EmitARM64WinCFISaveFPLR(int Offset) override;
86  void EmitARM64WinCFISaveFPLRX(int Offset) override;
87  void EmitARM64WinCFISaveReg(unsigned Reg, int Offset) override;
88  void EmitARM64WinCFISaveRegX(unsigned Reg, int Offset) override;
89  void EmitARM64WinCFISaveRegP(unsigned Reg, int Offset) override;
90  void EmitARM64WinCFISaveRegPX(unsigned Reg, int Offset) override;
91  void EmitARM64WinCFISaveFReg(unsigned Reg, int Offset) override;
92  void EmitARM64WinCFISaveFRegX(unsigned Reg, int Offset) override;
93  void EmitARM64WinCFISaveFRegP(unsigned Reg, int Offset) override;
94  void EmitARM64WinCFISaveFRegPX(unsigned Reg, int Offset) override;
95  void EmitARM64WinCFISetFP() override;
96  void EmitARM64WinCFIAddFP(unsigned Size) override;
97  void EmitARM64WinCFINop() override;
98  void EmitARM64WinCFIPrologEnd() override;
99  void EmitARM64WinCFIEpilogStart() override;
100  void EmitARM64WinCFIEpilogEnd() override;
101 private:
102  void EmitARM64WinUnwindCode(unsigned UnwindCode, int Reg, int Offset);
103 };
104 
107 
108 } // end namespace llvm
109 
110 #endif
This class represents lattice values for constants.
Definition: AllocatorList.h:23
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
Target specific streamer interface.
Definition: MCStreamer.h:85
unsigned Reg
virtual void emitInst(uint32_t Inst)
Callback used to implement the .inst directive.
virtual void EmitARM64WinCFISaveRegP(unsigned Reg, int Offset)
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
virtual void EmitARM64WinCFIAddFP(unsigned Size)
const MCExpr * addConstantPoolEntry(const MCExpr *, unsigned Size, SMLoc Loc)
Callback used to implement the ldr= pseudo.
virtual void EmitARM64WinCFIAllocStack(unsigned Size)
virtual void EmitARM64WinCFISaveFRegP(unsigned Reg, int Offset)
virtual void EmitARM64WinCFISaveFRegX(unsigned Reg, int Offset)
Streaming machine code generation interface.
Definition: MCStreamer.h:190
virtual void EmitARM64WinCFISaveFPLRX(int Offset)
AArch64TargetWinCOFFStreamer(llvm::MCStreamer &S)
MCTargetStreamer * createAArch64ObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI)
virtual void EmitARM64WinCFISaveReg(unsigned Reg, int Offset)
MCStreamer & getStreamer()
Definition: MCStreamer.h:93
virtual void EmitARM64WinCFISaveRegPX(unsigned Reg, int Offset)
virtual void EmitARM64WinCFISaveFPLR(int Offset)
virtual void EmitARM64WinCFISaveFRegPX(unsigned Reg, int Offset)
Generic base class for all target subtargets.
uint32_t Size
Definition: Profile.cpp:46
void emitCurrentConstantPool()
Callback used to implemnt the .ltorg directive.
virtual void EmitARM64WinCFISaveFReg(unsigned Reg, int Offset)
Represents a location in source code.
Definition: SMLoc.h:23
virtual void EmitARM64WinCFISaveRegX(unsigned Reg, int Offset)