diff --git a/clang/include/clang/Basic/TargetInfo.h b/clang/include/clang/Basic/TargetInfo.h
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -222,9 +222,7 @@
   mutable VersionTuple PlatformMinVersion;
 
   unsigned HasAlignMac68kSupport : 1;
-  unsigned RealTypeUsesObjCFPRetMask
-      : llvm::BitmaskEnumDetail::bitWidth(
-            (int)FloatModeKind::LLVM_BITMASK_LARGEST_ENUMERATOR);
+  unsigned RealTypeUsesObjCFPRetMask : llvm::BitWidth<FloatModeKind>;
   unsigned ComplexLongDoubleUsesFP2Ret : 1;
 
   unsigned HasBuiltinMSVaList : 1;
@@ -893,7 +891,7 @@
   /// Check whether the given real type should use the "fpret" flavor of
   /// Objective-C message passing on this target.
   bool useObjCFPRetForRealType(FloatModeKind T) const {
-    return RealTypeUsesObjCFPRetMask & llvm::BitmaskEnumDetail::Underlying(T);
+    return (int)((FloatModeKind)RealTypeUsesObjCFPRetMask & T);
   }
 
   /// Check whether _Complex long double should use the "fp2ret" flavor
diff --git a/clang/lib/Basic/Targets/X86.h b/clang/lib/Basic/Targets/X86.h
--- a/clang/lib/Basic/Targets/X86.h
+++ b/clang/lib/Basic/Targets/X86.h
@@ -421,8 +421,8 @@
 
     // Use fpret for all types.
     RealTypeUsesObjCFPRetMask =
-        (int)(FloatModeKind::Float | FloatModeKind::Double |
-              FloatModeKind::LongDouble);
+        (unsigned)(FloatModeKind::Float | FloatModeKind::Double |
+                   FloatModeKind::LongDouble);
 
     // x86-32 has atomics up to 8 bytes
     MaxAtomicPromoteWidth = 64;
@@ -701,7 +701,7 @@
                                         "64-i64:64-f80:128-n8:16:32:64-S128");
 
     // Use fpret only for long double.
-    RealTypeUsesObjCFPRetMask = (int)FloatModeKind::LongDouble;
+    RealTypeUsesObjCFPRetMask = (unsigned)FloatModeKind::LongDouble;
 
     // Use fp2ret for _Complex long double.
     ComplexLongDoubleUsesFP2Ret = true;