diff --git a/include/llvm/Object/COFFYAML.h b/include/llvm/Object/COFFYAML.h
index b5f9cccf85d..3f48e07f575 100644
--- a/include/llvm/Object/COFFYAML.h
+++ b/include/llvm/Object/COFFYAML.h
@@ -121,8 +121,13 @@ struct ScalarEnumerationTraits<COFF::SymbolComplexType> {
 };
 
 template <>
-struct ScalarEnumerationTraits<COFF::RelocationTypeX86> {
-  static void enumeration(IO &IO, COFF::RelocationTypeX86 &Value);
+struct ScalarEnumerationTraits<COFF::RelocationTypeI386> {
+  static void enumeration(IO &IO, COFF::RelocationTypeI386 &Value);
+};
+
+template <>
+struct ScalarEnumerationTraits<COFF::RelocationTypeAMD64> {
+  static void enumeration(IO &IO, COFF::RelocationTypeAMD64 &Value);
 };
 
 template <>
diff --git a/include/llvm/Support/COFF.h b/include/llvm/Support/COFF.h
index dca7fc6ee89..f0e5c7dc628 100644
--- a/include/llvm/Support/COFF.h
+++ b/include/llvm/Support/COFF.h
@@ -275,7 +275,7 @@ namespace COFF {
     uint16_t Type;
   };
 
-  enum RelocationTypeX86 {
+  enum RelocationTypeI386 {
     IMAGE_REL_I386_ABSOLUTE = 0x0000,
     IMAGE_REL_I386_DIR16    = 0x0001,
     IMAGE_REL_I386_REL16    = 0x0002,
@@ -286,8 +286,10 @@ namespace COFF {
     IMAGE_REL_I386_SECREL   = 0x000B,
     IMAGE_REL_I386_TOKEN    = 0x000C,
     IMAGE_REL_I386_SECREL7  = 0x000D,
-    IMAGE_REL_I386_REL32    = 0x0014,
+    IMAGE_REL_I386_REL32    = 0x0014
+  };
 
+  enum RelocationTypeAMD64 {
     IMAGE_REL_AMD64_ABSOLUTE  = 0x0000,
     IMAGE_REL_AMD64_ADDR64    = 0x0001,
     IMAGE_REL_AMD64_ADDR32    = 0x0002,
diff --git a/lib/Object/COFFYAML.cpp b/lib/Object/COFFYAML.cpp
index 94b72ffcbf3..d05576fc49d 100644
--- a/lib/Object/COFFYAML.cpp
+++ b/lib/Object/COFFYAML.cpp
@@ -132,8 +132,8 @@ void ScalarEnumerationTraits<COFF::SymbolComplexType>::enumeration(
   ECase(IMAGE_SYM_DTYPE_ARRAY);
 }
 
-void ScalarEnumerationTraits<COFF::RelocationTypeX86>::enumeration(
-    IO &IO, COFF::RelocationTypeX86 &Value) {
+void ScalarEnumerationTraits<COFF::RelocationTypeI386>::enumeration(
+    IO &IO, COFF::RelocationTypeI386 &Value) {
   ECase(IMAGE_REL_I386_ABSOLUTE);
   ECase(IMAGE_REL_I386_DIR16);
   ECase(IMAGE_REL_I386_REL16);
@@ -145,6 +145,10 @@ void ScalarEnumerationTraits<COFF::RelocationTypeX86>::enumeration(
   ECase(IMAGE_REL_I386_TOKEN);
   ECase(IMAGE_REL_I386_SECREL7);
   ECase(IMAGE_REL_I386_REL32);
+}
+
+void ScalarEnumerationTraits<COFF::RelocationTypeAMD64>::enumeration(
+    IO &IO, COFF::RelocationTypeAMD64 &Value) {
   ECase(IMAGE_REL_AMD64_ABSOLUTE);
   ECase(IMAGE_REL_AMD64_ADDR64);
   ECase(IMAGE_REL_AMD64_ADDR32);
@@ -272,22 +276,33 @@ struct NHeaderCharacteristics {
   COFF::Characteristics Characteristics;
 };
 
+template <typename RelocType>
 struct NType {
-  NType(IO &) : Type(COFF::RelocationTypeX86(0)) {}
-  NType(IO &, uint16_t T) : Type(COFF::RelocationTypeX86(T)) {}
+  NType(IO &) : Type(RelocType(0)) {}
+  NType(IO &, uint16_t T) : Type(RelocType(T)) {}
   uint16_t denormalize(IO &) { return Type; }
-  COFF::RelocationTypeX86 Type;
+  RelocType Type;
 };
 
 }
 
 void MappingTraits<COFFYAML::Relocation>::mapping(IO &IO,
                                                   COFFYAML::Relocation &Rel) {
-  MappingNormalization<NType, uint16_t> NT(IO, Rel.Type);
-
   IO.mapRequired("VirtualAddress", Rel.VirtualAddress);
   IO.mapRequired("SymbolName", Rel.SymbolName);
-  IO.mapRequired("Type", NT->Type);
+
+  COFF::header &H = *static_cast<COFF::header *>(IO.getContext());
+  if (H.Machine == COFF::IMAGE_FILE_MACHINE_I386) {
+    MappingNormalization<NType<COFF::RelocationTypeI386>, uint16_t> NT(
+        IO, Rel.Type);
+    IO.mapRequired("Type", NT->Type);
+  } else if (H.Machine == COFF::IMAGE_FILE_MACHINE_AMD64) {
+    MappingNormalization<NType<COFF::RelocationTypeAMD64>, uint16_t> NT(
+        IO, Rel.Type);
+    IO.mapRequired("Type", NT->Type);
+  } else {
+    IO.mapRequired("Type", Rel.Type);
+  }
 }
 
 void MappingTraits<COFF::header>::mapping(IO &IO, COFF::header &H) {
@@ -297,6 +312,7 @@ void MappingTraits<COFF::header>::mapping(IO &IO, COFF::header &H) {
 
   IO.mapRequired("Machine", NM->Machine);
   IO.mapOptional("Characteristics", NC->Characteristics);
+  IO.setContext(static_cast<void *>(&H));
 }
 
 void MappingTraits<COFF::AuxiliaryFunctionDefinition>::mapping(
diff --git a/test/Object/Inputs/COFF/x86-64.yaml b/test/Object/Inputs/COFF/x86-64.yaml
index 1dc2b10cf41..b8a863a429c 100644
--- a/test/Object/Inputs/COFF/x86-64.yaml
+++ b/test/Object/Inputs/COFF/x86-64.yaml
@@ -30,6 +30,16 @@ sections:
     Characteristics: [IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE, ] # 0xc0100040
     SectionData:  !hex "48656C6C6F20576F726C642100" # |Hello World!.|
 
+  - !Section
+    Name: '.CRT$XCU'
+    Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ ]
+    Alignment: 8
+    SectionData:  !hex "0000000000000000"
+    Relocations:
+      - VirtualAddress: 0
+        SymbolName: '??__Ex@@YAXXZ'
+        Type: IMAGE_REL_AMD64_ADDR64
+
 symbols:
   - !Symbol
     Name: .text
@@ -91,3 +101,10 @@ symbols:
     ComplexType: IMAGE_SYM_DTYPE_NULL # (0)
     StorageClass: IMAGE_SYM_CLASS_EXTERNAL # (2)
 
+  - !Symbol
+    Name: '??__Ex@@YAXXZ'
+    Value: 0
+    SectionNumber: 3
+    SimpleType: IMAGE_SYM_TYPE_NULL # (0)
+    ComplexType: IMAGE_SYM_DTYPE_FUNCTION # (2)
+    StorageClass: IMAGE_SYM_CLASS_STATIC # (3)
diff --git a/test/Object/Inputs/trivial-object-test.coff-x86-64 b/test/Object/Inputs/trivial-object-test.coff-x86-64
index 077591482ce..ed144d1265f 100644
Binary files a/test/Object/Inputs/trivial-object-test.coff-x86-64 and b/test/Object/Inputs/trivial-object-test.coff-x86-64 differ
diff --git a/test/Object/obj2yaml.test b/test/Object/obj2yaml.test
index d96275fe2cc..5ab8a152242 100644
--- a/test/Object/obj2yaml.test
+++ b/test/Object/obj2yaml.test
@@ -112,6 +112,16 @@ COFF-X86-64-NEXT:     Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_S
 COFF-X86-64-NEXT:     Alignment: 1
 COFF-X86-64-NEXT:     SectionData: 48656C6C6F20576F726C642100
 
+COFF-X86-64:        - Name: '.CRT$XCU'
+COFF-X86-64-NEXT:     Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ ]
+COFF-X86-64-NEXT:     Alignment: 8
+COFF-X86-64-NEXT:     SectionData:  0000000000000000
+
+COFF-X86-64:     Relocations:
+COFF-X86-64-NEXT:       - VirtualAddress: 0
+COFF-X86-64-NEXT:         SymbolName: '??__Ex@@YAXXZ'
+COFF-X86-64-NEXT:         Type: IMAGE_REL_AMD64_ADDR64
+
 COFF-X86-64: symbols:
 COFF-X86-64-NEXT:   - Name: .text
 COFF-X86-64-NEXT:     Value: 0
@@ -143,7 +153,7 @@ COFF-X86-64:        - Name: main
 COFF-X86-64-NEXT:     Value: 0
 COFF-X86-64-NEXT:     SectionNumber: 1
 COFF-X86-64-NEXT:     SimpleType: IMAGE_SYM_TYPE_NULL
-COFF-X86-64-NEXT:     ComplexType: IMAGE_SYM_DTYPE_NULL
+COFF-X86-64-NEXT:     ComplexType: IMAGE_SYM_DTYPE_FUNCTION
 COFF-X86-64-NEXT:     StorageClass: IMAGE_SYM_CLASS_EXTERNAL
 
 COFF-X86-64:        - Name: L.str
@@ -166,4 +176,10 @@ COFF-X86-64-NEXT:     SectionNumber: 0
 COFF-X86-64-NEXT:     SimpleType: IMAGE_SYM_TYPE_NULL
 COFF-X86-64-NEXT:     ComplexType: IMAGE_SYM_DTYPE_NULL
 COFF-X86-64-NEXT:     StorageClass: IMAGE_SYM_CLASS_EXTERNAL
-COFF-X86-64-NOT:      NumberOfAuxSymbols
+
+COFF-X86-64:        - Name: '??__Ex@@YAXXZ'
+COFF-X86-64-NEXT:     Value: 0
+COFF-X86-64-NEXT:     SectionNumber: 3
+COFF-X86-64-NEXT:     SimpleType: IMAGE_SYM_TYPE_NULL
+COFF-X86-64-NEXT:     ComplexType: IMAGE_SYM_DTYPE_FUNCTION
+COFF-X86-64-NEXT:     StorageClass: IMAGE_SYM_CLASS_STATIC