diff --git a/llvm/include/llvm/BinaryFormat/COFF.h b/llvm/include/llvm/BinaryFormat/COFF.h
--- a/llvm/include/llvm/BinaryFormat/COFF.h
+++ b/llvm/include/llvm/BinaryFormat/COFF.h
@@ -440,7 +440,8 @@
 enum WeakExternalCharacteristics : unsigned {
   IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY = 1,
   IMAGE_WEAK_EXTERN_SEARCH_LIBRARY = 2,
-  IMAGE_WEAK_EXTERN_SEARCH_ALIAS = 3
+  IMAGE_WEAK_EXTERN_SEARCH_ALIAS = 3,
+  IMAGE_WEAK_EXTERN_ANTI_DEPENDENCY = 4
 };
 
 struct AuxiliarySectionDefinition {
diff --git a/llvm/include/llvm/DebugInfo/CodeView/CodeView.h b/llvm/include/llvm/DebugInfo/CodeView/CodeView.h
--- a/llvm/include/llvm/DebugInfo/CodeView/CodeView.h
+++ b/llvm/include/llvm/DebugInfo/CodeView/CodeView.h
@@ -135,6 +135,9 @@
   Thumb = 0xf0,
   ARMNT = 0xf4,
   ARM64 = 0xf6,
+  HybridX86ARM64 = 0xf7,
+  ARM64EC = 0xf8,
+  ARM64X = 0xf9,
   D3D11_Shader = 0x100,
 };
 
diff --git a/llvm/lib/DebugInfo/CodeView/EnumTables.cpp b/llvm/lib/DebugInfo/CodeView/EnumTables.cpp
--- a/llvm/lib/DebugInfo/CodeView/EnumTables.cpp
+++ b/llvm/lib/DebugInfo/CodeView/EnumTables.cpp
@@ -201,6 +201,9 @@
     CV_ENUM_CLASS_ENT(CPUType, Thumb),
     CV_ENUM_CLASS_ENT(CPUType, ARMNT),
     CV_ENUM_CLASS_ENT(CPUType, ARM64),
+    CV_ENUM_CLASS_ENT(CPUType, HybridX86ARM64),
+    CV_ENUM_CLASS_ENT(CPUType, ARM64EC),
+    CV_ENUM_CLASS_ENT(CPUType, ARM64X),
     CV_ENUM_CLASS_ENT(CPUType, D3D11_Shader),
 };
 
diff --git a/llvm/lib/ObjectYAML/COFFYAML.cpp b/llvm/lib/ObjectYAML/COFFYAML.cpp
--- a/llvm/lib/ObjectYAML/COFFYAML.cpp
+++ b/llvm/lib/ObjectYAML/COFFYAML.cpp
@@ -49,6 +49,7 @@
   ECase(IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY);
   ECase(IMAGE_WEAK_EXTERN_SEARCH_LIBRARY);
   ECase(IMAGE_WEAK_EXTERN_SEARCH_ALIAS);
+  ECase(IMAGE_WEAK_EXTERN_ANTI_DEPENDENCY);
 }
 
 void ScalarEnumerationTraits<COFFYAML::AuxSymbolType>::enumeration(