Coverage Report

Created: 2019-02-21 13:17

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/MC/MCContext.h
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//===- MCContext.h - Machine Code Context -----------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCCONTEXT_H
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#define LLVM_MC_MCCONTEXT_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/MC/MCAsmMacro.h"
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#include "llvm/MC/MCDwarf.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MC/SectionKind.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/MD5.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
31
#include <cassert>
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#include <cstddef>
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#include <cstdint>
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#include <map>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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namespace llvm {
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  class CodeViewContext;
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  class MCAsmInfo;
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  class MCLabel;
45
  class MCObjectFileInfo;
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  class MCRegisterInfo;
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  class MCSection;
48
  class MCSectionCOFF;
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  class MCSectionELF;
50
  class MCSectionMachO;
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  class MCSectionWasm;
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  class MCStreamer;
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  class MCSymbol;
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  class MCSymbolELF;
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  class MCSymbolWasm;
56
  class SMLoc;
57
  class SourceMgr;
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59
  /// Context object for machine code objects.  This class owns all of the
60
  /// sections that it creates.
61
  ///
62
  class MCContext {
63
  public:
64
    using SymbolTable = StringMap<MCSymbol *, BumpPtrAllocator &>;
65
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  private:
67
    /// The SourceMgr for this object, if any.
68
    const SourceMgr *SrcMgr;
69
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    /// The SourceMgr for inline assembly, if any.
71
    SourceMgr *InlineSrcMgr;
72
73
    /// The MCAsmInfo for this target.
74
    const MCAsmInfo *MAI;
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76
    /// The MCRegisterInfo for this target.
77
    const MCRegisterInfo *MRI;
78
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    /// The MCObjectFileInfo for this target.
80
    const MCObjectFileInfo *MOFI;
81
82
    std::unique_ptr<CodeViewContext> CVContext;
83
84
    /// Allocator object used for creating machine code objects.
85
    ///
86
    /// We use a bump pointer allocator to avoid the need to track all allocated
87
    /// objects.
88
    BumpPtrAllocator Allocator;
89
90
    SpecificBumpPtrAllocator<MCSectionCOFF> COFFAllocator;
91
    SpecificBumpPtrAllocator<MCSectionELF> ELFAllocator;
92
    SpecificBumpPtrAllocator<MCSectionMachO> MachOAllocator;
93
    SpecificBumpPtrAllocator<MCSectionWasm> WasmAllocator;
94
95
    /// Bindings of names to symbols.
96
    SymbolTable Symbols;
97
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    /// A mapping from a local label number and an instance count to a symbol.
99
    /// For example, in the assembly
100
    ///     1:
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    ///     2:
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    ///     1:
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    /// We have three labels represented by the pairs (1, 0), (2, 0) and (1, 1)
104
    DenseMap<std::pair<unsigned, unsigned>, MCSymbol *> LocalSymbols;
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    /// Keeps tracks of names that were used both for used declared and
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    /// artificial symbols. The value is "true" if the name has been used for a
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    /// non-section symbol (there can be at most one of those, plus an unlimited
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    /// number of section symbols with the same name).
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    StringMap<bool, BumpPtrAllocator &> UsedNames;
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    /// The next ID to dole out to an unnamed assembler temporary symbol with
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    /// a given prefix.
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    StringMap<unsigned> NextID;
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    /// Instances of directional local labels.
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    DenseMap<unsigned, MCLabel *> Instances;
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    /// NextInstance() creates the next instance of the directional local label
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    /// for the LocalLabelVal and adds it to the map if needed.
120
    unsigned NextInstance(unsigned LocalLabelVal);
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    /// GetInstance() gets the current instance of the directional local label
122
    /// for the LocalLabelVal and adds it to the map if needed.
123
    unsigned GetInstance(unsigned LocalLabelVal);
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125
    /// The file name of the log file from the environment variable
126
    /// AS_SECURE_LOG_FILE.  Which must be set before the .secure_log_unique
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    /// directive is used or it is an error.
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    char *SecureLogFile;
129
    /// The stream that gets written to for the .secure_log_unique directive.
130
    std::unique_ptr<raw_fd_ostream> SecureLog;
131
    /// Boolean toggled when .secure_log_unique / .secure_log_reset is seen to
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    /// catch errors if .secure_log_unique appears twice without
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    /// .secure_log_reset appearing between them.
134
    bool SecureLogUsed = false;
135
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    /// The compilation directory to use for DW_AT_comp_dir.
137
    SmallString<128> CompilationDir;
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    /// Prefix replacement map for source file information.
140
    std::map<const std::string, const std::string> DebugPrefixMap;
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    /// The main file name if passed in explicitly.
143
    std::string MainFileName;
144
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    /// The dwarf file and directory tables from the dwarf .file directive.
146
    /// We now emit a line table for each compile unit. To reduce the prologue
147
    /// size of each line table, the files and directories used by each compile
148
    /// unit are separated.
149
    std::map<unsigned, MCDwarfLineTable> MCDwarfLineTablesCUMap;
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    /// The current dwarf line information from the last dwarf .loc directive.
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    MCDwarfLoc CurrentDwarfLoc;
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    bool DwarfLocSeen = false;
154
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    /// Generate dwarf debugging info for assembly source files.
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    bool GenDwarfForAssembly = false;
157
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    /// The current dwarf file number when generate dwarf debugging info for
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    /// assembly source files.
160
    unsigned GenDwarfFileNumber = 0;
161
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    /// Sections for generating the .debug_ranges and .debug_aranges sections.
163
    SetVector<MCSection *> SectionsForRanges;
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    /// The information gathered from labels that will have dwarf label
166
    /// entries when generating dwarf assembly source files.
167
    std::vector<MCGenDwarfLabelEntry> MCGenDwarfLabelEntries;
168
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    /// The string to embed in the debug information for the compile unit, if
170
    /// non-empty.
171
    StringRef DwarfDebugFlags;
172
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    /// The string to embed in as the dwarf AT_producer for the compile unit, if
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    /// non-empty.
175
    StringRef DwarfDebugProducer;
176
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    /// The maximum version of dwarf that we should emit.
178
    uint16_t DwarfVersion = 4;
179
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    /// Honor temporary labels, this is useful for debugging semantic
181
    /// differences between temporary and non-temporary labels (primarily on
182
    /// Darwin).
183
    bool AllowTemporaryLabels = true;
184
    bool UseNamesOnTempLabels = true;
185
186
    /// The Compile Unit ID that we are currently processing.
187
    unsigned DwarfCompileUnitID = 0;
188
189
    struct ELFSectionKey {
190
      std::string SectionName;
191
      StringRef GroupName;
192
      unsigned UniqueID;
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194
      ELFSectionKey(StringRef SectionName, StringRef GroupName,
195
                    unsigned UniqueID)
196
2.06M
          : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) {
197
2.06M
      }
198
199
21.0M
      bool operator<(const ELFSectionKey &Other) const {
200
21.0M
        if (SectionName != Other.SectionName)
201
20.5M
          return SectionName < Other.SectionName;
202
475k
        if (GroupName != Other.GroupName)
203
125
          return GroupName < Other.GroupName;
204
475k
        return UniqueID < Other.UniqueID;
205
475k
      }
206
    };
207
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    struct COFFSectionKey {
209
      std::string SectionName;
210
      StringRef GroupName;
211
      int SelectionKey;
212
      unsigned UniqueID;
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214
      COFFSectionKey(StringRef SectionName, StringRef GroupName,
215
                     int SelectionKey, unsigned UniqueID)
216
          : SectionName(SectionName), GroupName(GroupName),
217
55.3k
            SelectionKey(SelectionKey), UniqueID(UniqueID) {}
218
219
420k
      bool operator<(const COFFSectionKey &Other) const {
220
420k
        if (SectionName != Other.SectionName)
221
416k
          return SectionName < Other.SectionName;
222
4.20k
        if (GroupName != Other.GroupName)
223
2.91k
          return GroupName < Other.GroupName;
224
1.28k
        if (SelectionKey != Other.SelectionKey)
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13
          return SelectionKey < Other.SelectionKey;
226
1.27k
        return UniqueID < Other.UniqueID;
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1.27k
      }
228
    };
229
230
    struct WasmSectionKey {
231
      std::string SectionName;
232
      StringRef GroupName;
233
      unsigned UniqueID;
234
235
      WasmSectionKey(StringRef SectionName, StringRef GroupName,
236
                     unsigned UniqueID)
237
11.0k
          : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) {
238
11.0k
      }
239
240
76.3k
      bool operator<(const WasmSectionKey &Other) const {
241
76.3k
        if (SectionName != Other.SectionName)
242
76.3k
          return SectionName < Other.SectionName;
243
37
        if (GroupName != Other.GroupName)
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0
          return GroupName < Other.GroupName;
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37
        return UniqueID < Other.UniqueID;
246
37
      }
247
    };
248
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    StringMap<MCSectionMachO *> MachOUniquingMap;
250
    std::map<ELFSectionKey, MCSectionELF *> ELFUniquingMap;
251
    std::map<COFFSectionKey, MCSectionCOFF *> COFFUniquingMap;
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    std::map<WasmSectionKey, MCSectionWasm *> WasmUniquingMap;
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    StringMap<bool> RelSecNames;
254
255
    SpecificBumpPtrAllocator<MCSubtargetInfo> MCSubtargetAllocator;
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    /// Do automatic reset in destructor
258
    bool AutoReset;
259
260
    bool HadError = false;
261
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    MCSymbol *createSymbolImpl(const StringMapEntry<bool> *Name,
263
                               bool CanBeUnnamed);
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    MCSymbol *createSymbol(StringRef Name, bool AlwaysAddSuffix,
265
                           bool IsTemporary);
266
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    MCSymbol *getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal,
268
                                                unsigned Instance);
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    MCSectionELF *createELFSectionImpl(StringRef Section, unsigned Type,
271
                                       unsigned Flags, SectionKind K,
272
                                       unsigned EntrySize,
273
                                       const MCSymbolELF *Group,
274
                                       unsigned UniqueID,
275
                                       const MCSymbolELF *Associated);
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    /// Map of currently defined macros.
278
    StringMap<MCAsmMacro> MacroMap;
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  public:
281
    explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI,
282
                       const MCObjectFileInfo *MOFI,
283
                       const SourceMgr *Mgr = nullptr, bool DoAutoReset = true);
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    MCContext(const MCContext &) = delete;
285
    MCContext &operator=(const MCContext &) = delete;
286
    ~MCContext();
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17
    const SourceMgr *getSourceManager() const { return SrcMgr; }
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290
1.52k
    void setInlineSourceManager(SourceMgr *SM) { InlineSrcMgr = SM; }
291
292
26.9M
    const MCAsmInfo *getAsmInfo() const { return MAI; }
293
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36.5M
    const MCRegisterInfo *getRegisterInfo() const { return MRI; }
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409k
    const MCObjectFileInfo *getObjectFileInfo() const { return MOFI; }
297
298
    CodeViewContext &getCVContext();
299
300
5
    void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; }
301
18.1k
    void setUseNamesOnTempLabels(bool Value) { UseNamesOnTempLabels = Value; }
302
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    /// \name Module Lifetime Management
304
    /// @{
305
306
    /// reset - return object to right after construction state to prepare
307
    /// to process a new module
308
    void reset();
309
310
    /// @}
311
312
    /// \name Symbol Management
313
    /// @{
314
315
    /// Create and return a new linker temporary symbol with a unique but
316
    /// unspecified name.
317
    MCSymbol *createLinkerPrivateTempSymbol();
318
319
    /// Create and return a new assembler temporary symbol with a unique but
320
    /// unspecified name.
321
    MCSymbol *createTempSymbol(bool CanBeUnnamed = true);
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323
    MCSymbol *createTempSymbol(const Twine &Name, bool AlwaysAddSuffix,
324
                               bool CanBeUnnamed = true);
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326
    /// Create the definition of a directional local symbol for numbered label
327
    /// (used for "1:" definitions).
328
    MCSymbol *createDirectionalLocalSymbol(unsigned LocalLabelVal);
329
330
    /// Create and return a directional local symbol for numbered label (used
331
    /// for "1b" or 1f" references).
332
    MCSymbol *getDirectionalLocalSymbol(unsigned LocalLabelVal, bool Before);
333
334
    /// Lookup the symbol inside with the specified \p Name.  If it exists,
335
    /// return it.  If not, create a forward reference and return it.
336
    ///
337
    /// \param Name - The symbol name, which must be unique across all symbols.
338
    MCSymbol *getOrCreateSymbol(const Twine &Name);
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340
    /// Gets a symbol that will be defined to the final stack offset of a local
341
    /// variable after codegen.
342
    ///
343
    /// \param Idx - The index of a local variable passed to \@llvm.localescape.
344
    MCSymbol *getOrCreateFrameAllocSymbol(StringRef FuncName, unsigned Idx);
345
346
    MCSymbol *getOrCreateParentFrameOffsetSymbol(StringRef FuncName);
347
348
    MCSymbol *getOrCreateLSDASymbol(StringRef FuncName);
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    /// Get the symbol for \p Name, or null.
351
    MCSymbol *lookupSymbol(const Twine &Name) const;
352
353
    /// Set value for a symbol.
354
    void setSymbolValue(MCStreamer &Streamer, StringRef Sym, uint64_t Val);
355
356
    /// getSymbols - Get a reference for the symbol table for clients that
357
    /// want to, for example, iterate over all symbols. 'const' because we
358
    /// still want any modifications to the table itself to use the MCContext
359
    /// APIs.
360
1.55k
    const SymbolTable &getSymbols() const { return Symbols; }
361
362
    /// @}
363
364
    /// \name Section Management
365
    /// @{
366
367
    enum : unsigned {
368
      /// Pass this value as the UniqueID during section creation to get the
369
      /// generic section with the given name and characteristics. The usual
370
      /// sections such as .text use this ID.
371
      GenericSectionID = ~0U
372
    };
373
374
    /// Return the MCSection for the specified mach-o section.  This requires
375
    /// the operands to be valid.
376
    MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,
377
                                    unsigned TypeAndAttributes,
378
                                    unsigned Reserved2, SectionKind K,
379
                                    const char *BeginSymName = nullptr);
380
381
    MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,
382
                                    unsigned TypeAndAttributes, SectionKind K,
383
861k
                                    const char *BeginSymName = nullptr) {
384
861k
      return getMachOSection(Segment, Section, TypeAndAttributes, 0, K,
385
861k
                             BeginSymName);
386
861k
    }
387
388
    MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
389
1.26M
                                unsigned Flags) {
390
1.26M
      return getELFSection(Section, Type, Flags, 0, "");
391
1.26M
    }
392
393
    MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
394
                                unsigned Flags, unsigned EntrySize,
395
1.48M
                                const Twine &Group) {
396
1.48M
      return getELFSection(Section, Type, Flags, EntrySize, Group, ~0);
397
1.48M
    }
398
399
    MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
400
                                unsigned Flags, unsigned EntrySize,
401
1.48M
                                const Twine &Group, unsigned UniqueID) {
402
1.48M
      return getELFSection(Section, Type, Flags, EntrySize, Group, UniqueID,
403
1.48M
                           nullptr);
404
1.48M
    }
405
406
    MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
407
                                unsigned Flags, unsigned EntrySize,
408
                                const Twine &Group, unsigned UniqueID,
409
                                const MCSymbolELF *Associated);
410
411
    MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
412
                                unsigned Flags, unsigned EntrySize,
413
                                const MCSymbolELF *Group, unsigned UniqueID,
414
                                const MCSymbolELF *Associated);
415
416
    /// Get a section with the provided group identifier. This section is
417
    /// named by concatenating \p Prefix with '.' then \p Suffix. The \p Type
418
    /// describes the type of the section and \p Flags are used to further
419
    /// configure this named section.
420
    MCSectionELF *getELFNamedSection(const Twine &Prefix, const Twine &Suffix,
421
                                     unsigned Type, unsigned Flags,
422
                                     unsigned EntrySize = 0);
423
424
    MCSectionELF *createELFRelSection(const Twine &Name, unsigned Type,
425
                                      unsigned Flags, unsigned EntrySize,
426
                                      const MCSymbolELF *Group,
427
                                      const MCSectionELF *RelInfoSection);
428
429
    void renameELFSection(MCSectionELF *Section, StringRef Name);
430
431
    MCSectionELF *createELFGroupSection(const MCSymbolELF *Group);
432
433
    MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics,
434
                                  SectionKind Kind, StringRef COMDATSymName,
435
                                  int Selection,
436
                                  unsigned UniqueID = GenericSectionID,
437
                                  const char *BeginSymName = nullptr);
438
439
    MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics,
440
                                  SectionKind Kind,
441
                                  const char *BeginSymName = nullptr);
442
443
    MCSectionCOFF *getCOFFSection(StringRef Section);
444
445
    /// Gets or creates a section equivalent to Sec that is associated with the
446
    /// section containing KeySym. For example, to create a debug info section
447
    /// associated with an inline function, pass the normal debug info section
448
    /// as Sec and the function symbol as KeySym.
449
    MCSectionCOFF *
450
    getAssociativeCOFFSection(MCSectionCOFF *Sec, const MCSymbol *KeySym,
451
                              unsigned UniqueID = GenericSectionID);
452
453
7.19k
    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K) {
454
7.19k
      return getWasmSection(Section, K, nullptr);
455
7.19k
    }
456
457
    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
458
7.19k
                                  const char *BeginSymName) {
459
7.19k
      return getWasmSection(Section, K, "", ~0, BeginSymName);
460
7.19k
    }
461
462
    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
463
3.83k
                                  const Twine &Group, unsigned UniqueID) {
464
3.83k
      return getWasmSection(Section, K, Group, UniqueID, nullptr);
465
3.83k
    }
466
467
    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
468
                                  const Twine &Group, unsigned UniqueID,
469
                                  const char *BeginSymName);
470
471
    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
472
                                  const MCSymbolWasm *Group, unsigned UniqueID,
473
                                  const char *BeginSymName);
474
475
    // Create and save a copy of STI and return a reference to the copy.
476
    MCSubtargetInfo &getSubtargetCopy(const MCSubtargetInfo &STI);
477
478
    /// @}
479
480
    /// \name Dwarf Management
481
    /// @{
482
483
    /// Get the compilation directory for DW_AT_comp_dir
484
    /// The compilation directory should be set with \c setCompilationDir before
485
    /// calling this function. If it is unset, an empty string will be returned.
486
225
    StringRef getCompilationDir() const { return CompilationDir; }
487
488
    /// Set the compilation directory for DW_AT_comp_dir
489
8.99k
    void setCompilationDir(StringRef S) { CompilationDir = S.str(); }
490
491
    /// Get the debug prefix map.
492
    const std::map<const std::string, const std::string> &
493
0
    getDebugPrefixMap() const {
494
0
      return DebugPrefixMap;
495
0
    }
496
497
    /// Add an entry to the debug prefix map.
498
    void addDebugPrefixMapEntry(const std::string &From, const std::string &To);
499
500
    // Remaps all debug directory paths in-place as per the debug prefix map.
501
    void RemapDebugPaths();
502
503
    /// Get the main file name for use in error messages and debug
504
    /// info. This can be set to ensure we've got the correct file name
505
    /// after preprocessing or for -save-temps.
506
68
    const std::string &getMainFileName() const { return MainFileName; }
507
508
    /// Set the main file name and override the default.
509
735
    void setMainFileName(StringRef S) { MainFileName = S; }
510
511
    /// Creates an entry in the dwarf file and directory tables.
512
    Expected<unsigned> getDwarfFile(StringRef Directory, StringRef FileName,
513
                                    unsigned FileNumber,
514
                                    MD5::MD5Result *Checksum,
515
                                    Optional<StringRef> Source, unsigned CUID);
516
517
    bool isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID = 0);
518
519
56.2k
    const std::map<unsigned, MCDwarfLineTable> &getMCDwarfLineTables() const {
520
56.2k
      return MCDwarfLineTablesCUMap;
521
56.2k
    }
522
523
1.04M
    MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) {
524
1.04M
      return MCDwarfLineTablesCUMap[CUID];
525
1.04M
    }
526
527
142
    const MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) const {
528
142
      auto I = MCDwarfLineTablesCUMap.find(CUID);
529
142
      assert(I != MCDwarfLineTablesCUMap.end());
530
142
      return I->second;
531
142
    }
532
533
57
    const SmallVectorImpl<MCDwarfFile> &getMCDwarfFiles(unsigned CUID = 0) {
534
57
      return getMCDwarfLineTable(CUID).getMCDwarfFiles();
535
57
    }
536
537
57
    const SmallVectorImpl<std::string> &getMCDwarfDirs(unsigned CUID = 0) {
538
57
      return getMCDwarfLineTable(CUID).getMCDwarfDirs();
539
57
    }
540
541
0
    bool hasMCLineSections() const {
542
0
      for (const auto &Table : MCDwarfLineTablesCUMap)
543
0
        if (!Table.second.getMCDwarfFiles().empty() || Table.second.getLabel())
544
0
          return true;
545
0
      return false;
546
0
    }
547
548
2.06M
    unsigned getDwarfCompileUnitID() { return DwarfCompileUnitID; }
549
550
69.1k
    void setDwarfCompileUnitID(unsigned CUIndex) {
551
69.1k
      DwarfCompileUnitID = CUIndex;
552
69.1k
    }
553
554
    /// Specifies the "root" file and directory of the compilation unit.
555
    /// These are "file 0" and "directory 0" in DWARF v5.
556
    void setMCLineTableRootFile(unsigned CUID, StringRef CompilationDir,
557
                                StringRef Filename, MD5::MD5Result *Checksum,
558
2.17k
                                Optional<StringRef> Source) {
559
2.17k
      getMCDwarfLineTable(CUID).setRootFile(CompilationDir, Filename, Checksum,
560
2.17k
                                            Source);
561
2.17k
    }
562
563
    /// Reports whether MD5 checksum usage is consistent (all-or-none).
564
142
    bool isDwarfMD5UsageConsistent(unsigned CUID) const {
565
142
      return getMCDwarfLineTable(CUID).isMD5UsageConsistent();
566
142
    }
567
568
    /// Saves the information from the currently parsed dwarf .loc directive
569
    /// and sets DwarfLocSeen.  When the next instruction is assembled an entry
570
    /// in the line number table with this information and the address of the
571
    /// instruction will be created.
572
    void setCurrentDwarfLoc(unsigned FileNum, unsigned Line, unsigned Column,
573
                            unsigned Flags, unsigned Isa,
574
1.03M
                            unsigned Discriminator) {
575
1.03M
      CurrentDwarfLoc.setFileNum(FileNum);
576
1.03M
      CurrentDwarfLoc.setLine(Line);
577
1.03M
      CurrentDwarfLoc.setColumn(Column);
578
1.03M
      CurrentDwarfLoc.setFlags(Flags);
579
1.03M
      CurrentDwarfLoc.setIsa(Isa);
580
1.03M
      CurrentDwarfLoc.setDiscriminator(Discriminator);
581
1.03M
      DwarfLocSeen = true;
582
1.03M
    }
583
584
1.60M
    void clearDwarfLocSeen() { DwarfLocSeen = false; }
585
586
29.6M
    bool getDwarfLocSeen() { return DwarfLocSeen; }
587
3.45M
    const MCDwarfLoc &getCurrentDwarfLoc() { return CurrentDwarfLoc; }
588
589
957k
    bool getGenDwarfForAssembly() { return GenDwarfForAssembly; }
590
8.29k
    void setGenDwarfForAssembly(bool Value) { GenDwarfForAssembly = Value; }
591
2.89k
    unsigned getGenDwarfFileNumber() { return GenDwarfFileNumber; }
592
593
1.29k
    void setGenDwarfFileNumber(unsigned FileNumber) {
594
1.29k
      GenDwarfFileNumber = FileNumber;
595
1.29k
    }
596
597
1.71k
    const SetVector<MCSection *> &getGenDwarfSectionSyms() {
598
1.71k
      return SectionsForRanges;
599
1.71k
    }
600
601
82
    bool addGenDwarfSection(MCSection *Sec) {
602
82
      return SectionsForRanges.insert(Sec);
603
82
    }
604
605
    void finalizeDwarfSections(MCStreamer &MCOS);
606
607
57
    const std::vector<MCGenDwarfLabelEntry> &getMCGenDwarfLabelEntries() const {
608
57
      return MCGenDwarfLabelEntries;
609
57
    }
610
611
121
    void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry &E) {
612
121
      MCGenDwarfLabelEntries.push_back(E);
613
121
    }
614
615
0
    void setDwarfDebugFlags(StringRef S) { DwarfDebugFlags = S; }
616
114
    StringRef getDwarfDebugFlags() { return DwarfDebugFlags; }
617
618
731
    void setDwarfDebugProducer(StringRef S) { DwarfDebugProducer = S; }
619
57
    StringRef getDwarfDebugProducer() { return DwarfDebugProducer; }
620
621
1.48M
    dwarf::DwarfFormat getDwarfFormat() const {
622
1.48M
      // TODO: Support DWARF64
623
1.48M
      return dwarf::DWARF32;
624
1.48M
    }
625
626
43.3k
    void setDwarfVersion(uint16_t v) { DwarfVersion = v; }
627
5.09M
    uint16_t getDwarfVersion() const { return DwarfVersion; }
628
629
    /// @}
630
631
2
    char *getSecureLogFile() { return SecureLogFile; }
632
2
    raw_fd_ostream *getSecureLog() { return SecureLog.get(); }
633
634
2
    void setSecureLog(std::unique_ptr<raw_fd_ostream> Value) {
635
2
      SecureLog = std::move(Value);
636
2
    }
637
638
2
    bool getSecureLogUsed() { return SecureLogUsed; }
639
2
    void setSecureLogUsed(bool Value) { SecureLogUsed = Value; }
640
641
25.6M
    void *allocate(unsigned Size, unsigned Align = 8) {
642
25.6M
      return Allocator.Allocate(Size, Align);
643
25.6M
    }
644
645
0
    void deallocate(void *Ptr) {}
646
647
16.8k
    bool hadError() { return HadError; }
648
    void reportError(SMLoc L, const Twine &Msg);
649
    // Unrecoverable error has occurred. Display the best diagnostic we can
650
    // and bail via exit(1). For now, most MC backend errors are unrecoverable.
651
    // FIXME: We should really do something about that.
652
    LLVM_ATTRIBUTE_NORETURN void reportFatalError(SMLoc L,
653
                                                  const Twine &Msg);
654
655
1.34M
    const MCAsmMacro *lookupMacro(StringRef Name) {
656
1.34M
      StringMap<MCAsmMacro>::iterator I = MacroMap.find(Name);
657
1.34M
      return (I == MacroMap.end()) ? 
nullptr1.15M
:
&I->getValue()197k
;
658
1.34M
    }
659
660
239
    void defineMacro(StringRef Name, MCAsmMacro Macro) {
661
239
      MacroMap.insert(std::make_pair(Name, std::move(Macro)));
662
239
    }
663
664
4
    void undefineMacro(StringRef Name) { MacroMap.erase(Name); }
665
  };
666
667
} // end namespace llvm
668
669
// operator new and delete aren't allowed inside namespaces.
670
// The throw specifications are mandated by the standard.
671
/// Placement new for using the MCContext's allocator.
672
///
673
/// This placement form of operator new uses the MCContext's allocator for
674
/// obtaining memory. It is a non-throwing new, which means that it returns
675
/// null on error. (If that is what the allocator does. The current does, so if
676
/// this ever changes, this operator will have to be changed, too.)
677
/// Usage looks like this (assuming there's an MCContext 'Context' in scope):
678
/// \code
679
/// // Default alignment (8)
680
/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments);
681
/// // Specific alignment
682
/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments);
683
/// \endcode
684
/// Please note that you cannot use delete on the pointer; it must be
685
/// deallocated using an explicit destructor call followed by
686
/// \c Context.Deallocate(Ptr).
687
///
688
/// \param Bytes The number of bytes to allocate. Calculated by the compiler.
689
/// \param C The MCContext that provides the allocator.
690
/// \param Alignment The alignment of the allocated memory (if the underlying
691
///                  allocator supports it).
692
/// \return The allocated memory. Could be NULL.
693
inline void *operator new(size_t Bytes, llvm::MCContext &C,
694
16.4M
                          size_t Alignment = 8) noexcept {
695
16.4M
  return C.allocate(Bytes, Alignment);
696
16.4M
}
697
/// Placement delete companion to the new above.
698
///
699
/// This operator is just a companion to the new above. There is no way of
700
/// invoking it directly; see the new operator for more details. This operator
701
/// is called implicitly by the compiler if a placement new expression using
702
/// the MCContext throws in the object constructor.
703
0
inline void operator delete(void *Ptr, llvm::MCContext &C, size_t) noexcept {
704
0
  C.deallocate(Ptr);
705
0
}
706
707
/// This placement form of operator new[] uses the MCContext's allocator for
708
/// obtaining memory. It is a non-throwing new[], which means that it returns
709
/// null on error.
710
/// Usage looks like this (assuming there's an MCContext 'Context' in scope):
711
/// \code
712
/// // Default alignment (8)
713
/// char *data = new (Context) char[10];
714
/// // Specific alignment
715
/// char *data = new (Context, 4) char[10];
716
/// \endcode
717
/// Please note that you cannot use delete on the pointer; it must be
718
/// deallocated using an explicit destructor call followed by
719
/// \c Context.Deallocate(Ptr).
720
///
721
/// \param Bytes The number of bytes to allocate. Calculated by the compiler.
722
/// \param C The MCContext that provides the allocator.
723
/// \param Alignment The alignment of the allocated memory (if the underlying
724
///                  allocator supports it).
725
/// \return The allocated memory. Could be NULL.
726
inline void *operator new[](size_t Bytes, llvm::MCContext &C,
727
0
                            size_t Alignment = 8) noexcept {
728
0
  return C.allocate(Bytes, Alignment);
729
0
}
730
731
/// Placement delete[] companion to the new[] above.
732
///
733
/// This operator is just a companion to the new[] above. There is no way of
734
/// invoking it directly; see the new[] operator for more details. This operator
735
/// is called implicitly by the compiler if a placement new[] expression using
736
/// the MCContext throws in the object constructor.
737
0
inline void operator delete[](void *Ptr, llvm::MCContext &C) noexcept {
738
0
  C.deallocate(Ptr);
739
0
}
740
741
#endif // LLVM_MC_MCCONTEXT_H