/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
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1 | | //==- llvm/CodeGen/TargetLoweringObjectFileImpl.h - Object Info --*- 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 | | // This file implements classes used to handle lowerings specific to common |
11 | | // object file formats. |
12 | | // |
13 | | //===----------------------------------------------------------------------===// |
14 | | |
15 | | #ifndef LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H |
16 | | #define LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H |
17 | | |
18 | | #include "llvm/IR/Module.h" |
19 | | #include "llvm/MC/MCExpr.h" |
20 | | #include "llvm/Target/TargetLoweringObjectFile.h" |
21 | | |
22 | | namespace llvm { |
23 | | |
24 | | class GlobalValue; |
25 | | class MachineModuleInfo; |
26 | | class Mangler; |
27 | | class MCContext; |
28 | | class MCSection; |
29 | | class MCSymbol; |
30 | | class TargetMachine; |
31 | | |
32 | | class TargetLoweringObjectFileELF : public TargetLoweringObjectFile { |
33 | | bool UseInitArray = false; |
34 | | mutable unsigned NextUniqueID = 1; // ID 0 is reserved for execute-only sections |
35 | | |
36 | | protected: |
37 | | MCSymbolRefExpr::VariantKind PLTRelativeVariantKind = |
38 | | MCSymbolRefExpr::VK_None; |
39 | | |
40 | | public: |
41 | 17.3k | TargetLoweringObjectFileELF() = default; |
42 | 17.0k | ~TargetLoweringObjectFileELF() override = default; |
43 | | |
44 | | /// Emit Obj-C garbage collection and linker options. |
45 | | void emitModuleMetadata(MCStreamer &Streamer, Module &M, |
46 | | const TargetMachine &TM) const override; |
47 | | |
48 | | void emitPersonalityValue(MCStreamer &Streamer, const DataLayout &TM, |
49 | | const MCSymbol *Sym) const override; |
50 | | |
51 | | /// Given a constant with the SectionKind, return a section that it should be |
52 | | /// placed in. |
53 | | MCSection *getSectionForConstant(const DataLayout &DL, SectionKind Kind, |
54 | | const Constant *C, |
55 | | unsigned &Align) const override; |
56 | | |
57 | | MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, |
58 | | const TargetMachine &TM) const override; |
59 | | |
60 | | MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, |
61 | | const TargetMachine &TM) const override; |
62 | | |
63 | | MCSection *getSectionForJumpTable(const Function &F, |
64 | | const TargetMachine &TM) const override; |
65 | | |
66 | | bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference, |
67 | | const Function &F) const override; |
68 | | |
69 | | /// Return an MCExpr to use for a reference to the specified type info global |
70 | | /// variable from exception handling information. |
71 | | const MCExpr *getTTypeGlobalReference(const GlobalValue *GV, |
72 | | unsigned Encoding, |
73 | | const TargetMachine &TM, |
74 | | MachineModuleInfo *MMI, |
75 | | MCStreamer &Streamer) const override; |
76 | | |
77 | | // The symbol that gets passed to .cfi_personality. |
78 | | MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, |
79 | | const TargetMachine &TM, |
80 | | MachineModuleInfo *MMI) const override; |
81 | | |
82 | | void InitializeELF(bool UseInitArray_); |
83 | | MCSection *getStaticCtorSection(unsigned Priority, |
84 | | const MCSymbol *KeySym) const override; |
85 | | MCSection *getStaticDtorSection(unsigned Priority, |
86 | | const MCSymbol *KeySym) const override; |
87 | | |
88 | | const MCExpr *lowerRelativeReference(const GlobalValue *LHS, |
89 | | const GlobalValue *RHS, |
90 | | const TargetMachine &TM) const override; |
91 | | }; |
92 | | |
93 | | class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile { |
94 | | public: |
95 | | TargetLoweringObjectFileMachO(); |
96 | 6.46k | ~TargetLoweringObjectFileMachO() override = default; |
97 | | |
98 | | void Initialize(MCContext &Ctx, const TargetMachine &TM) override; |
99 | | |
100 | | /// Emit the module flags that specify the garbage collection information. |
101 | | void emitModuleMetadata(MCStreamer &Streamer, Module &M, |
102 | | const TargetMachine &TM) const override; |
103 | | |
104 | | MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, |
105 | | const TargetMachine &TM) const override; |
106 | | |
107 | | MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, |
108 | | const TargetMachine &TM) const override; |
109 | | |
110 | | MCSection *getSectionForConstant(const DataLayout &DL, SectionKind Kind, |
111 | | const Constant *C, |
112 | | unsigned &Align) const override; |
113 | | |
114 | | /// The mach-o version of this method defaults to returning a stub reference. |
115 | | const MCExpr *getTTypeGlobalReference(const GlobalValue *GV, |
116 | | unsigned Encoding, |
117 | | const TargetMachine &TM, |
118 | | MachineModuleInfo *MMI, |
119 | | MCStreamer &Streamer) const override; |
120 | | |
121 | | // The symbol that gets passed to .cfi_personality. |
122 | | MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, |
123 | | const TargetMachine &TM, |
124 | | MachineModuleInfo *MMI) const override; |
125 | | |
126 | | /// Get MachO PC relative GOT entry relocation |
127 | | const MCExpr *getIndirectSymViaGOTPCRel(const MCSymbol *Sym, |
128 | | const MCValue &MV, int64_t Offset, |
129 | | MachineModuleInfo *MMI, |
130 | | MCStreamer &Streamer) const override; |
131 | | |
132 | | void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV, |
133 | | const TargetMachine &TM) const override; |
134 | | }; |
135 | | |
136 | | class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile { |
137 | | mutable unsigned NextUniqueID = 0; |
138 | | |
139 | | public: |
140 | 1.20k | ~TargetLoweringObjectFileCOFF() override = default; |
141 | | |
142 | | void Initialize(MCContext &Ctx, const TargetMachine &TM) override; |
143 | | MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, |
144 | | const TargetMachine &TM) const override; |
145 | | |
146 | | MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, |
147 | | const TargetMachine &TM) const override; |
148 | | |
149 | | void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV, |
150 | | const TargetMachine &TM) const override; |
151 | | |
152 | | MCSection *getSectionForJumpTable(const Function &F, |
153 | | const TargetMachine &TM) const override; |
154 | | |
155 | | /// Emit Obj-C garbage collection and linker options. |
156 | | void emitModuleMetadata(MCStreamer &Streamer, Module &M, |
157 | | const TargetMachine &TM) const override; |
158 | | |
159 | | MCSection *getStaticCtorSection(unsigned Priority, |
160 | | const MCSymbol *KeySym) const override; |
161 | | MCSection *getStaticDtorSection(unsigned Priority, |
162 | | const MCSymbol *KeySym) const override; |
163 | | |
164 | | void emitLinkerFlagsForGlobal(raw_ostream &OS, |
165 | | const GlobalValue *GV) const override; |
166 | | }; |
167 | | |
168 | | class TargetLoweringObjectFileWasm : public TargetLoweringObjectFile { |
169 | | mutable unsigned NextUniqueID = 0; |
170 | | |
171 | | public: |
172 | | TargetLoweringObjectFileWasm() = default; |
173 | 0 | ~TargetLoweringObjectFileWasm() override = default; |
174 | | |
175 | | MCSection *getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, |
176 | | const TargetMachine &TM) const override; |
177 | | |
178 | | MCSection *SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, |
179 | | const TargetMachine &TM) const override; |
180 | | |
181 | | bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference, |
182 | | const Function &F) const override; |
183 | | |
184 | | void InitializeWasm(); |
185 | | |
186 | | const MCExpr *lowerRelativeReference(const GlobalValue *LHS, |
187 | | const GlobalValue *RHS, |
188 | | const TargetMachine &TM) const override; |
189 | | }; |
190 | | |
191 | | } // end namespace llvm |
192 | | |
193 | | #endif // LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H |