--- a/include/llvm/MC/MCContext.h	Fri Nov 25 19:14:25 2016 +0900
+++ b/include/llvm/MC/MCContext.h	Fri Oct 27 17:07:41 2017 +0900
@@ -15,49 +15,58 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Twine.h"
+#include "llvm/BinaryFormat/Dwarf.h"
 #include "llvm/MC/MCDwarf.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/SectionKind.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
 #include <map>
-#include <tuple>
-#include <vector> // FIXME: Shouldn't be needed.
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
 
 namespace llvm {
+
+  class CodeViewContext;
   class MCAsmInfo;
-  class MCExpr;
+  class MCLabel;
+  class MCObjectFileInfo;
+  class MCRegisterInfo;
   class MCSection;
+  class MCSectionCOFF;
+  class MCSectionELF;
+  class MCSectionMachO;
+  class MCSectionWasm;
+  class MCStreamer;
   class MCSymbol;
   class MCSymbolELF;
-  class MCLabel;
-  struct MCDwarfFile;
-  class MCDwarfLoc;
-  class MCObjectFileInfo;
-  class MCRegisterInfo;
-  class MCLineSection;
+  class MCSymbolWasm;
   class SMLoc;
-  class MCSectionMachO;
-  class MCSectionELF;
-  class MCSectionCOFF;
-  class CodeViewContext;
+  class SourceMgr;
 
   /// Context object for machine code objects.  This class owns all of the
   /// sections that it creates.
   ///
   class MCContext {
-    MCContext(const MCContext &) = delete;
-    MCContext &operator=(const MCContext &) = delete;
-
   public:
-    typedef StringMap<MCSymbol *, BumpPtrAllocator &> SymbolTable;
+    using SymbolTable = StringMap<MCSymbol *, BumpPtrAllocator &>;
 
   private:
     /// The SourceMgr for this object, if any.
     const SourceMgr *SrcMgr;
 
+    /// The SourceMgr for inline assembly, if any.
+    SourceMgr *InlineSrcMgr;
+
     /// The MCAsmInfo for this target.
     const MCAsmInfo *MAI;
 
@@ -78,14 +87,11 @@
     SpecificBumpPtrAllocator<MCSectionCOFF> COFFAllocator;
     SpecificBumpPtrAllocator<MCSectionELF> ELFAllocator;
     SpecificBumpPtrAllocator<MCSectionMachO> MachOAllocator;
+    SpecificBumpPtrAllocator<MCSectionWasm> WasmAllocator;
 
     /// Bindings of names to symbols.
     SymbolTable Symbols;
 
-    /// ELF sections can have a corresponding symbol. This maps one to the
-    /// other.
-    DenseMap<const MCSectionELF *, MCSymbolELF *> SectionSymbols;
-
     /// A mapping from a local label number and an instance count to a symbol.
     /// For example, in the assembly
     ///     1:
@@ -122,7 +128,7 @@
     /// Boolean toggled when .secure_log_unique / .secure_log_reset is seen to
     /// catch errors if .secure_log_unique appears twice without
     /// .secure_log_reset appearing between them.
-    bool SecureLogUsed;
+    bool SecureLogUsed = false;
 
     /// The compilation directory to use for DW_AT_comp_dir.
     SmallString<128> CompilationDir;
@@ -138,14 +144,14 @@
 
     /// The current dwarf line information from the last dwarf .loc directive.
     MCDwarfLoc CurrentDwarfLoc;
-    bool DwarfLocSeen;
+    bool DwarfLocSeen = false;
 
     /// Generate dwarf debugging info for assembly source files.
-    bool GenDwarfForAssembly;
+    bool GenDwarfForAssembly = false;
 
     /// The current dwarf file number when generate dwarf debugging info for
     /// assembly source files.
-    unsigned GenDwarfFileNumber;
+    unsigned GenDwarfFileNumber = 0;
 
     /// Sections for generating the .debug_ranges and .debug_aranges sections.
     SetVector<MCSection *> SectionsForRanges;
@@ -163,25 +169,27 @@
     StringRef DwarfDebugProducer;
 
     /// The maximum version of dwarf that we should emit.
-    uint16_t DwarfVersion;
+    uint16_t DwarfVersion = 4;
 
     /// Honor temporary labels, this is useful for debugging semantic
     /// differences between temporary and non-temporary labels (primarily on
     /// Darwin).
-    bool AllowTemporaryLabels;
+    bool AllowTemporaryLabels = true;
     bool UseNamesOnTempLabels = true;
 
     /// The Compile Unit ID that we are currently processing.
-    unsigned DwarfCompileUnitID;
+    unsigned DwarfCompileUnitID = 0;
 
     struct ELFSectionKey {
       std::string SectionName;
       StringRef GroupName;
       unsigned UniqueID;
+
       ELFSectionKey(StringRef SectionName, StringRef GroupName,
                     unsigned UniqueID)
           : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) {
       }
+
       bool operator<(const ELFSectionKey &Other) const {
         if (SectionName != Other.SectionName)
           return SectionName < Other.SectionName;
@@ -196,10 +204,12 @@
       StringRef GroupName;
       int SelectionKey;
       unsigned UniqueID;
+
       COFFSectionKey(StringRef SectionName, StringRef GroupName,
                      int SelectionKey, unsigned UniqueID)
           : SectionName(SectionName), GroupName(GroupName),
             SelectionKey(SelectionKey), UniqueID(UniqueID) {}
+
       bool operator<(const COFFSectionKey &Other) const {
         if (SectionName != Other.SectionName)
           return SectionName < Other.SectionName;
@@ -211,17 +221,37 @@
       }
     };
 
+    struct WasmSectionKey {
+      std::string SectionName;
+      StringRef GroupName;
+      unsigned UniqueID;
+
+      WasmSectionKey(StringRef SectionName, StringRef GroupName,
+                     unsigned UniqueID)
+          : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) {
+      }
+
+      bool operator<(const WasmSectionKey &Other) const {
+        if (SectionName != Other.SectionName)
+          return SectionName < Other.SectionName;
+        if (GroupName != Other.GroupName)
+          return GroupName < Other.GroupName;
+        return UniqueID < Other.UniqueID;
+      }
+    };
+
     StringMap<MCSectionMachO *> MachOUniquingMap;
     std::map<ELFSectionKey, MCSectionELF *> ELFUniquingMap;
     std::map<COFFSectionKey, MCSectionCOFF *> COFFUniquingMap;
-    StringMap<bool> ELFRelSecNames;
+    std::map<WasmSectionKey, MCSectionWasm *> WasmUniquingMap;
+    StringMap<bool> RelSecNames;
 
     SpecificBumpPtrAllocator<MCSubtargetInfo> MCSubtargetAllocator;
 
     /// Do automatic reset in destructor
     bool AutoReset;
 
-    bool HadError;
+    bool HadError = false;
 
     MCSymbol *createSymbolImpl(const StringMapEntry<bool> *Name,
                                bool CanBeUnnamed);
@@ -231,14 +261,25 @@
     MCSymbol *getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal,
                                                 unsigned Instance);
 
+    MCSectionELF *createELFSectionImpl(StringRef Section, unsigned Type,
+                                       unsigned Flags, SectionKind K,
+                                       unsigned EntrySize,
+                                       const MCSymbolELF *Group,
+                                       unsigned UniqueID,
+                                       const MCSymbolELF *Associated);
+
   public:
     explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI,
                        const MCObjectFileInfo *MOFI,
                        const SourceMgr *Mgr = nullptr, bool DoAutoReset = true);
+    MCContext(const MCContext &) = delete;
+    MCContext &operator=(const MCContext &) = delete;
     ~MCContext();
 
     const SourceMgr *getSourceManager() const { return SrcMgr; }
 
+    void setInlineSourceManager(SourceMgr *SM) { InlineSrcMgr = SM; }
+
     const MCAsmInfo *getAsmInfo() const { return MAI; }
 
     const MCRegisterInfo *getRegisterInfo() const { return MRI; }
@@ -287,8 +328,6 @@
     /// \param Name - The symbol name, which must be unique across all symbols.
     MCSymbol *getOrCreateSymbol(const Twine &Name);
 
-    MCSymbolELF *getOrCreateSectionSymbol(const MCSectionELF &Section);
-
     /// Gets a symbol that will be defined to the final stack offset of a local
     /// variable after codegen.
     ///
@@ -302,6 +341,9 @@
     /// Get the symbol for \p Name, or null.
     MCSymbol *lookupSymbol(const Twine &Name) const;
 
+    /// Set value for a symbol.
+    void setSymbolValue(MCStreamer &Streamer, StringRef Sym, uint64_t Val);
+
     /// getSymbols - Get a reference for the symbol table for clients that
     /// want to, for example, iterate over all symbols. 'const' because we
     /// still want any modifications to the table itself to use the MCContext
@@ -336,25 +378,13 @@
 
     MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
                                 unsigned Flags) {
-      return getELFSection(Section, Type, Flags, nullptr);
-    }
-
-    MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
-                                unsigned Flags, const char *BeginSymName) {
-      return getELFSection(Section, Type, Flags, 0, "", BeginSymName);
+      return getELFSection(Section, Type, Flags, 0, "");
     }
 
     MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
                                 unsigned Flags, unsigned EntrySize,
                                 const Twine &Group) {
-      return getELFSection(Section, Type, Flags, EntrySize, Group, nullptr);
-    }
-
-    MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
-                                unsigned Flags, unsigned EntrySize,
-                                const Twine &Group, const char *BeginSymName) {
-      return getELFSection(Section, Type, Flags, EntrySize, Group, ~0,
-                           BeginSymName);
+      return getELFSection(Section, Type, Flags, EntrySize, Group, ~0);
     }
 
     MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
@@ -367,13 +397,12 @@
     MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
                                 unsigned Flags, unsigned EntrySize,
                                 const Twine &Group, unsigned UniqueID,
-                                const char *BeginSymName);
+                                const MCSymbolELF *Associated);
 
     MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
                                 unsigned Flags, unsigned EntrySize,
                                 const MCSymbolELF *Group, unsigned UniqueID,
-                                const char *BeginSymName,
-                                const MCSectionELF *Associated);
+                                const MCSymbolELF *Associated);
 
     /// Get a section with the provided group identifier. This section is
     /// named by concatenating \p Prefix with '.' then \p Suffix. The \p Type
@@ -386,7 +415,7 @@
     MCSectionELF *createELFRelSection(const Twine &Name, unsigned Type,
                                       unsigned Flags, unsigned EntrySize,
                                       const MCSymbolELF *Group,
-                                      const MCSectionELF *Associated);
+                                      const MCSectionELF *RelInfoSection);
 
     void renameELFSection(MCSectionELF *Section, StringRef Name);
 
@@ -412,6 +441,28 @@
     getAssociativeCOFFSection(MCSectionCOFF *Sec, const MCSymbol *KeySym,
                               unsigned UniqueID = GenericSectionID);
 
+    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K) {
+      return getWasmSection(Section, K, nullptr);
+    }
+
+    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
+                                  const char *BeginSymName) {
+      return getWasmSection(Section, K, "", ~0, BeginSymName);
+    }
+
+    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
+                                  const Twine &Group, unsigned UniqueID) {
+      return getWasmSection(Section, K, Group, UniqueID, nullptr);
+    }
+
+    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
+                                  const Twine &Group, unsigned UniqueID,
+                                  const char *BeginSymName);
+
+    MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
+                                  const MCSymbolWasm *Group, unsigned UniqueID,
+                                  const char *BeginSymName);
+
     // Create and save a copy of STI and return a reference to the copy.
     MCSubtargetInfo &getSubtargetCopy(const MCSubtargetInfo &STI);
 
@@ -459,6 +510,7 @@
     const SmallVectorImpl<MCDwarfFile> &getMCDwarfFiles(unsigned CUID = 0) {
       return getMCDwarfLineTable(CUID).getMCDwarfFiles();
     }
+
     const SmallVectorImpl<std::string> &getMCDwarfDirs(unsigned CUID = 0) {
       return getMCDwarfLineTable(CUID).getMCDwarfDirs();
     }
@@ -469,10 +521,13 @@
           return true;
       return false;
     }
+
     unsigned getDwarfCompileUnitID() { return DwarfCompileUnitID; }
+
     void setDwarfCompileUnitID(unsigned CUIndex) {
       DwarfCompileUnitID = CUIndex;
     }
+
     void setMCLineTableCompilationDir(unsigned CUID, StringRef CompilationDir) {
       getMCDwarfLineTable(CUID).setCompilationDir(CompilationDir);
     }
@@ -492,6 +547,7 @@
       CurrentDwarfLoc.setDiscriminator(Discriminator);
       DwarfLocSeen = true;
     }
+
     void clearDwarfLocSeen() { DwarfLocSeen = false; }
 
     bool getDwarfLocSeen() { return DwarfLocSeen; }
@@ -500,20 +556,25 @@
     bool getGenDwarfForAssembly() { return GenDwarfForAssembly; }
     void setGenDwarfForAssembly(bool Value) { GenDwarfForAssembly = Value; }
     unsigned getGenDwarfFileNumber() { return GenDwarfFileNumber; }
+
     void setGenDwarfFileNumber(unsigned FileNumber) {
       GenDwarfFileNumber = FileNumber;
     }
+
     const SetVector<MCSection *> &getGenDwarfSectionSyms() {
       return SectionsForRanges;
     }
+
     bool addGenDwarfSection(MCSection *Sec) {
       return SectionsForRanges.insert(Sec);
     }
 
     void finalizeDwarfSections(MCStreamer &MCOS);
+
     const std::vector<MCGenDwarfLabelEntry> &getMCGenDwarfLabelEntries() const {
       return MCGenDwarfLabelEntries;
     }
+
     void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry &E) {
       MCGenDwarfLabelEntries.push_back(E);
     }
@@ -524,6 +585,11 @@
     void setDwarfDebugProducer(StringRef S) { DwarfDebugProducer = S; }
     StringRef getDwarfDebugProducer() { return DwarfDebugProducer; }
 
+    dwarf::DwarfFormat getDwarfFormat() const {
+      // TODO: Support DWARF64
+      return dwarf::DWARF32;
+    }
+
     void setDwarfVersion(uint16_t v) { DwarfVersion = v; }
     uint16_t getDwarfVersion() const { return DwarfVersion; }
 
@@ -531,15 +597,18 @@
 
     char *getSecureLogFile() { return SecureLogFile; }
     raw_fd_ostream *getSecureLog() { return SecureLog.get(); }
-    bool getSecureLogUsed() { return SecureLogUsed; }
+
     void setSecureLog(std::unique_ptr<raw_fd_ostream> Value) {
       SecureLog = std::move(Value);
     }
+
+    bool getSecureLogUsed() { return SecureLogUsed; }
     void setSecureLogUsed(bool Value) { SecureLogUsed = Value; }
 
     void *allocate(unsigned Size, unsigned Align = 8) {
       return Allocator.Allocate(Size, Align);
     }
+
     void deallocate(void *Ptr) {}
 
     bool hadError() { return HadError; }
@@ -625,4 +694,4 @@
   C.deallocate(Ptr);
 }
 
-#endif
+#endif // LLVM_MC_MCCONTEXT_H