Index: include/llvm/Support/YAMLTraits.h
===================================================================
--- include/llvm/Support/YAMLTraits.h
+++ include/llvm/Support/YAMLTraits.h
@@ -473,16 +473,22 @@
   }
 
   template <typename T>
-  void bitSetCase(T &Val, const char* Str, const T ConstVal) {
-    if ( bitSetMatch(Str, outputting() && (Val & ConstVal) == ConstVal) ) {
+  void bitSetCase(T &Val, const char *Str, const T ConstVal,
+                  const T EnumMask = T(0)) {
+    bool Match = (EnumMask && (Val & EnumMask) == ConstVal) ||
+                 (!EnumMask && (Val & ConstVal) == ConstVal);
+    if (bitSetMatch(Str, outputting() && Match)) {
       Val = Val | ConstVal;
     }
   }
 
   // allow anonymous enum values to be used with LLVM_YAML_STRONG_TYPEDEF
   template <typename T>
-  void bitSetCase(T &Val, const char* Str, const uint32_t ConstVal) {
-    if ( bitSetMatch(Str, outputting() && (Val & ConstVal) == ConstVal) ) {
+  void bitSetCase(T &Val, const char *Str, const uint32_t ConstVal,
+                  const uint32_t EnumMask = 0) {
+    bool Match = (EnumMask && (Val & EnumMask) == ConstVal) ||
+                 (!EnumMask && (Val & ConstVal) == ConstVal);
+    if (bitSetMatch(Str, outputting() && Match)) {
       Val = Val | ConstVal;
     }
   }
Index: lib/Object/ELFYAML.cpp
===================================================================
--- lib/Object/ELFYAML.cpp
+++ lib/Object/ELFYAML.cpp
@@ -246,16 +246,17 @@
   const auto *Object = static_cast<ELFYAML::Object *>(IO.getContext());
   assert(Object && "The IO context is not initialized");
 #define BCase(X) IO.bitSetCase(Value, #X, ELF::X);
+#define BCaseMask(X, M) IO.bitSetCase(Value, #X, ELF::X, ELF::M);
   switch (Object->Header.Machine) {
   case ELF::EM_ARM:
     BCase(EF_ARM_SOFT_FLOAT)
     BCase(EF_ARM_VFP_FLOAT)
-    BCase(EF_ARM_EABI_UNKNOWN)
-    BCase(EF_ARM_EABI_VER1)
-    BCase(EF_ARM_EABI_VER2)
-    BCase(EF_ARM_EABI_VER3)
-    BCase(EF_ARM_EABI_VER4)
-    BCase(EF_ARM_EABI_VER5)
+    BCaseMask(EF_ARM_EABI_UNKNOWN, EF_ARM_EABIMASK)
+    BCaseMask(EF_ARM_EABI_VER1, EF_ARM_EABIMASK)
+    BCaseMask(EF_ARM_EABI_VER2, EF_ARM_EABIMASK)
+    BCaseMask(EF_ARM_EABI_VER3, EF_ARM_EABIMASK)
+    BCaseMask(EF_ARM_EABI_VER4, EF_ARM_EABIMASK)
+    BCaseMask(EF_ARM_EABI_VER5, EF_ARM_EABIMASK)
     break;
   case ELF::EM_MIPS:
     BCase(EF_MIPS_NOREORDER)
@@ -266,17 +267,17 @@
     BCase(EF_MIPS_ABI_O32)
     BCase(EF_MIPS_MICROMIPS)
     BCase(EF_MIPS_ARCH_ASE_M16)
-    BCase(EF_MIPS_ARCH_1)
-    BCase(EF_MIPS_ARCH_2)
-    BCase(EF_MIPS_ARCH_3)
-    BCase(EF_MIPS_ARCH_4)
-    BCase(EF_MIPS_ARCH_5)
-    BCase(EF_MIPS_ARCH_32)
-    BCase(EF_MIPS_ARCH_64)
-    BCase(EF_MIPS_ARCH_32R2)
-    BCase(EF_MIPS_ARCH_64R2)
-    BCase(EF_MIPS_ARCH_32R6)
-    BCase(EF_MIPS_ARCH_64R6)
+    BCaseMask(EF_MIPS_ARCH_1, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_2, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_3, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_4, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_5, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_32, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_64, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_32R2, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_64R2, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_32R6, EF_MIPS_ARCH)
+    BCaseMask(EF_MIPS_ARCH_64R6, EF_MIPS_ARCH)
     break;
   case ELF::EM_HEXAGON:
     BCase(EF_HEXAGON_MACH_V2)
@@ -292,6 +293,7 @@
     llvm_unreachable("Unsupported architecture");
   }
 #undef BCase
+#undef BCaseMask
 }
 
 void ScalarEnumerationTraits<ELFYAML::ELF_SHT>::enumeration(
Index: test/Object/obj2yaml.test
===================================================================
--- test/Object/obj2yaml.test
+++ test/Object/obj2yaml.test
@@ -191,7 +191,7 @@
 ELF-MIPSEL-NEXT:   Data:            ELFDATA2LSB
 ELF-MIPSEL-NEXT:   Type:            ET_REL
 ELF-MIPSEL-NEXT:   Machine:         EM_MIPS
-ELF-MIPSEL-NEXT:   Flags:           [ EF_MIPS_NOREORDER, EF_MIPS_PIC, EF_MIPS_CPIC, EF_MIPS_ABI_O32, EF_MIPS_ARCH_1, EF_MIPS_ARCH_2, EF_MIPS_ARCH_5, EF_MIPS_ARCH_32 ]
+ELF-MIPSEL-NEXT:   Flags:           [ EF_MIPS_NOREORDER, EF_MIPS_PIC, EF_MIPS_CPIC, EF_MIPS_ABI_O32, EF_MIPS_ARCH_32 ]
 ELF-MIPSEL-NEXT: Sections:
 ELF-MIPSEL-NEXT:   - Name:            .text
 ELF-MIPSEL-NEXT:     Type:            SHT_PROGBITS
@@ -285,7 +285,7 @@
 ELF-MIPS64EL-NEXT:   Data:            ELFDATA2LSB
 ELF-MIPS64EL-NEXT:   Type:            ET_REL
 ELF-MIPS64EL-NEXT:   Machine:         EM_MIPS
-ELF-MIPS64EL-NEXT:   Flags:           [ EF_MIPS_ARCH_1, EF_MIPS_ARCH_3 ]
+ELF-MIPS64EL-NEXT:   Flags:           [ EF_MIPS_ARCH_3 ]
 ELF-MIPS64EL-NEXT: Sections:
 ELF-MIPS64EL-NEXT:   - Name:            .text
 ELF-MIPS64EL-NEXT:     Type:            SHT_PROGBITS