diff --git a/linux-x64/clang/include/llvm/ObjectYAML/COFFYAML.h b/linux-x64/clang/include/llvm/ObjectYAML/COFFYAML.h
index 78f021f..eec5af9 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/COFFYAML.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/COFFYAML.h
@@ -1,9 +1,8 @@
 //===- COFFYAML.h - COFF YAMLIO implementation ------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -58,7 +57,13 @@
 struct Relocation {
   uint32_t VirtualAddress;
   uint16_t Type;
+
+  // Normally a Relocation can refer to the symbol via its name.
+  // It can also use a direct symbol table index instead (with no name
+  // specified), allowing disambiguating between multiple symbols with the
+  // same name or crafting intentionally broken files for testing.
   StringRef SymbolName;
+  Optional<uint32_t> SymbolTableIndex;
 };
 
 struct Section {
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLDebugSections.h b/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLDebugSections.h
index d620008..9cbacb8 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLDebugSections.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLDebugSections.h
@@ -1,9 +1,8 @@
 //=- CodeViewYAMLDebugSections.h - CodeView YAMLIO debug sections -*- C++ -*-=//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLSymbols.h b/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLSymbols.h
index 791193c..7c05c9e 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLSymbols.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLSymbols.h
@@ -1,9 +1,8 @@
 //===- CodeViewYAMLSymbols.h - CodeView YAMLIO Symbol implementation ------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLTypeHashing.h b/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLTypeHashing.h
index 344966f..d6cec8d 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLTypeHashing.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLTypeHashing.h
@@ -1,9 +1,8 @@
 //==- CodeViewYAMLTypeHashing.h - CodeView YAMLIO Type hashing ----*- C++-*-==//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLTypes.h b/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLTypes.h
index 1b1306d..04b5e0b 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLTypes.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/CodeViewYAMLTypes.h
@@ -1,9 +1,8 @@
 //==- CodeViewYAMLTypes.h - CodeView YAMLIO Type implementation --*- C++ -*-==//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/DWARFEmitter.h b/linux-x64/clang/include/llvm/ObjectYAML/DWARFEmitter.h
index ce32274..2ccc876 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/DWARFEmitter.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/DWARFEmitter.h
@@ -1,9 +1,8 @@
 //===--- DWARFEmitter.h - ---------------------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 /// \file
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/DWARFYAML.h b/linux-x64/clang/include/llvm/ObjectYAML/DWARFYAML.h
index 705c887..78d736c 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/DWARFYAML.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/DWARFYAML.h
@@ -1,9 +1,8 @@
 //===- DWARFYAML.h - DWARF YAMLIO implementation ----------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 ///
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/ELFYAML.h b/linux-x64/clang/include/llvm/ObjectYAML/ELFYAML.h
index 92081f0..e194e59 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/ELFYAML.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/ELFYAML.h
@@ -1,9 +1,8 @@
 //===- ELFYAML.h - ELF YAMLIO implementation --------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 ///
@@ -44,6 +43,8 @@
 LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_ELFOSABI)
 // Just use 64, since it can hold 32-bit values too.
 LLVM_YAML_STRONG_TYPEDEF(uint64_t, ELF_EF)
+// Just use 64, since it can hold 32-bit values too.
+LLVM_YAML_STRONG_TYPEDEF(uint64_t, ELF_DYNTAG)
 LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_PF)
 LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_SHT)
 LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_REL)
@@ -68,6 +69,7 @@
   ELF_ELFCLASS Class;
   ELF_ELFDATA Data;
   ELF_ELFOSABI OSABI;
+  llvm::yaml::Hex8 ABIVersion;
   ELF_ET Type;
   ELF_EM Machine;
   ELF_EF Flags;
@@ -107,8 +109,14 @@
   StringRef sectionNameOrType;
 };
 
+struct DynamicEntry {
+  ELF_DYNTAG Tag;
+  llvm::yaml::Hex64 Val;
+};
+
 struct Section {
   enum class SectionKind {
+    Dynamic,
     Group,
     RawContent,
     Relocation,
@@ -121,13 +129,23 @@
   ELF_SHF Flags;
   llvm::yaml::Hex64 Address;
   StringRef Link;
-  StringRef Info;
   llvm::yaml::Hex64 AddressAlign;
   Optional<llvm::yaml::Hex64> EntSize;
 
   Section(SectionKind Kind) : Kind(Kind) {}
   virtual ~Section();
 };
+
+struct DynamicSection : Section {
+  std::vector<DynamicEntry> Entries;
+
+  DynamicSection() : Section(SectionKind::Dynamic) {}
+
+  static bool classof(const Section *S) {
+    return S->Kind == SectionKind::Dynamic;
+  }
+};
+
 struct RawContentSection : Section {
   yaml::BinaryRef Content;
   llvm::yaml::Hex64 Size;
@@ -153,6 +171,7 @@
   // Members of a group contain a flag and a list of section indices
   // that are part of the group.
   std::vector<SectionOrType> Members;
+  StringRef Signature; /* Info */
 
   Group() : Section(SectionKind::Group) {}
 
@@ -170,6 +189,7 @@
 
 struct RelocationSection : Section {
   std::vector<Relocation> Relocations;
+  StringRef RelocatableSec; /* Info */
 
   RelocationSection() : Section(SectionKind::Relocation) {}
 
@@ -214,6 +234,7 @@
 } // end namespace ELFYAML
 } // end namespace llvm
 
+LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::DynamicEntry)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::ProgramHeader)
 LLVM_YAML_IS_SEQUENCE_VECTOR(std::unique_ptr<llvm::ELFYAML::Section>)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::Symbol)
@@ -297,6 +318,11 @@
 };
 
 template <>
+struct ScalarEnumerationTraits<ELFYAML::ELF_DYNTAG> {
+  static void enumeration(IO &IO, ELFYAML::ELF_DYNTAG &Value);
+};
+
+template <>
 struct ScalarEnumerationTraits<ELFYAML::ELF_RSS> {
   static void enumeration(IO &IO, ELFYAML::ELF_RSS &Value);
 };
@@ -351,6 +377,10 @@
   static void mapping(IO &IO, ELFYAML::LocalGlobalWeakSymbols &Symbols);
 };
 
+template <> struct MappingTraits<ELFYAML::DynamicEntry> {
+  static void mapping(IO &IO, ELFYAML::DynamicEntry &Rel);
+};
+
 template <> struct MappingTraits<ELFYAML::Relocation> {
   static void mapping(IO &IO, ELFYAML::Relocation &Rel);
 };
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/MachOYAML.h b/linux-x64/clang/include/llvm/ObjectYAML/MachOYAML.h
index cec4f86..d7e1c03 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/MachOYAML.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/MachOYAML.h
@@ -1,9 +1,8 @@
 //===- MachOYAML.h - Mach-O YAMLIO implementation ---------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 ///
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/ObjectYAML.h b/linux-x64/clang/include/llvm/ObjectYAML/ObjectYAML.h
index 00ce864..56f5f39 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/ObjectYAML.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/ObjectYAML.h
@@ -1,9 +1,8 @@
 //===- ObjectYAML.h ---------------------------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/WasmYAML.h b/linux-x64/clang/include/llvm/ObjectYAML/WasmYAML.h
index 8cd08e5..f5260bb 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/WasmYAML.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/WasmYAML.h
@@ -1,9 +1,8 @@
 //===- WasmYAML.h - Wasm YAMLIO implementation ------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 ///
@@ -74,6 +73,12 @@
   wasm::WasmInitExpr InitExpr;
 };
 
+struct Event {
+  uint32_t Index;
+  uint32_t Attribute;
+  uint32_t SigIndex;
+};
+
 struct Import {
   StringRef Module;
   StringRef Field;
@@ -83,6 +88,7 @@
     Global GlobalImport;
     Table TableImport;
     Limits Memory;
+    Event EventImport;
   };
 };
 
@@ -116,6 +122,11 @@
   StringRef Name;
 };
 
+struct ProducerEntry {
+  std::string Name;
+  std::string Version;
+};
+
 struct SegmentInfo {
   uint32_t Index;
   StringRef Name;
@@ -176,6 +187,21 @@
   yaml::BinaryRef Payload;
 };
 
+struct DylinkSection : CustomSection {
+  DylinkSection() : CustomSection("dylink") {}
+
+  static bool classof(const Section *S) {
+    auto C = dyn_cast<CustomSection>(S);
+    return C && C->Name == "dylink";
+  }
+
+  uint32_t MemorySize;
+  uint32_t MemoryAlignment;
+  uint32_t TableSize;
+  uint32_t TableAlignment;
+  std::vector<StringRef> Needed;
+};
+
 struct NameSection : CustomSection {
   NameSection() : CustomSection("name") {}
 
@@ -202,6 +228,19 @@
   std::vector<Comdat> Comdats;
 };
 
+struct ProducersSection : CustomSection {
+  ProducersSection() : CustomSection("producers") {}
+
+  static bool classof(const Section *S) {
+    auto C = dyn_cast<CustomSection>(S);
+    return C && C->Name == "producers";
+  }
+
+  std::vector<ProducerEntry> Languages;
+  std::vector<ProducerEntry> Tools;
+  std::vector<ProducerEntry> SDKs;
+};
+
 struct TypeSection : Section {
   TypeSection() : Section(wasm::WASM_SEC_TYPE) {}
 
@@ -262,6 +301,16 @@
   std::vector<Global> Globals;
 };
 
+struct EventSection : Section {
+  EventSection() : Section(wasm::WASM_SEC_EVENT) {}
+
+  static bool classof(const Section *S) {
+    return S->Type == wasm::WASM_SEC_EVENT;
+  }
+
+  std::vector<Event> Events;
+};
+
 struct ExportSection : Section {
   ExportSection() : Section(wasm::WASM_SEC_EXPORT) {}
 
@@ -334,11 +383,13 @@
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::LocalDecl)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::Relocation)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::NameEntry)
+LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::ProducerEntry)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::SegmentInfo)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::SymbolInfo)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::InitFunction)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::ComdatEntry)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::Comdat)
+LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::WasmYAML::Event)
 
 namespace llvm {
 namespace yaml {
@@ -411,6 +462,10 @@
   static void mapping(IO &IO, WasmYAML::NameEntry &NameEntry);
 };
 
+template <> struct MappingTraits<WasmYAML::ProducerEntry> {
+  static void mapping(IO &IO, WasmYAML::ProducerEntry &ProducerEntry);
+};
+
 template <> struct MappingTraits<WasmYAML::SegmentInfo> {
   static void mapping(IO &IO, WasmYAML::SegmentInfo &SegmentInfo);
 };
@@ -471,6 +526,10 @@
   static void enumeration(IO &IO, WasmYAML::RelocType &Kind);
 };
 
+template <> struct MappingTraits<WasmYAML::Event> {
+  static void mapping(IO &IO, WasmYAML::Event &Event);
+};
+
 } // end namespace yaml
 } // end namespace llvm
 
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/YAML.h b/linux-x64/clang/include/llvm/ObjectYAML/YAML.h
index 163cd8d..a14bfbc 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/YAML.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/YAML.h
@@ -1,9 +1,8 @@
 //===- YAML.h ---------------------------------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//