Make llvm memory barrier available as an intrinsic


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57751 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Builtins.cpp b/lib/AST/Builtins.cpp
index 3980d20..1823ee6 100644
--- a/lib/AST/Builtins.cpp
+++ b/lib/AST/Builtins.cpp
@@ -127,6 +127,10 @@
     else
       Type = Context.CharTy;
     break;
+  case 'b': // boolean
+    assert(!Long && !Signed && !Unsigned && "Bad modifiers for 'b'!");
+    Type = Context.BoolTy;
+    break;
   case 'z':  // size_t.
     assert(!Long && !Signed && !Unsigned && "Bad modifiers for 'z'!");
     Type = Context.getSizeType();