diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -824,8 +824,10 @@
               Previous->is(tok::string_literal))
             Previous->setType(TT_SelectorName);
         }
-        if (CurrentToken->is(tok::colon) || Style.isJavaScript())
+        if (CurrentToken->is(tok::colon) && OpeningBrace.is(TT_Unknown))
           OpeningBrace.setType(TT_DictLiteral);
+        else if (Style.isJavaScript())
+          OpeningBrace.overwriteFixedType(TT_DictLiteral);
       }
       if (CurrentToken->is(tok::comma)) {
         if (Style.isJavaScript())
diff --git a/clang/unittests/Format/TokenAnnotatorTest.cpp b/clang/unittests/Format/TokenAnnotatorTest.cpp
--- a/clang/unittests/Format/TokenAnnotatorTest.cpp
+++ b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -602,6 +602,16 @@
           << I;
 }
 
+TEST_F(TokenAnnotatorTest, UnderstandsAsm) {
+  auto Tokens = annotate("__asm{\n"
+                         "a:\n"
+                         "};");
+  ASSERT_EQ(Tokens.size(), 7u) << Tokens;
+  EXPECT_TOKEN(Tokens[0], tok::kw_asm, TT_Unknown);
+  EXPECT_TOKEN(Tokens[1], tok::l_brace, TT_InlineASMBrace);
+  EXPECT_TOKEN(Tokens[4], tok::r_brace, TT_InlineASMBrace);
+}
+
 } // namespace
 } // namespace format
 } // namespace clang