Fix for PR8695.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122564 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AST/ASTContext.cpp

@@ -3785,7 +3785,10 @@ static void EncodeBitField(const ASTContext *Context, std::string& S,
         break;
     }
     S += llvm::utostr(RL.getFieldOffset(i));
-    S += ObjCEncodingForPrimitiveKind(Context, T);
+    if (T->isEnumeralType())
+      S += 'i';
+    else
+      S += ObjCEncodingForPrimitiveKind(Context, T);
   }
   unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue();
   S += llvm::utostr(N);

test/CodeGenObjC/bitfield-gnu.m

@@ -0,0 +1,5 @@
+// RUN: %clang -S -emit-llvm -fgnu-runtime -o %t %s
+typedef enum { A1, A2 } A;
+typedef struct { A a : 1; } B;
+@interface Obj { B *b; } @end
+@implementation Obj @end