[ignition] desugar async functions/generators/modules in BytecodeGenerator

test/cctest/interpreter/test-bytecode-generator.cc

Index: test/cctest/interpreter/test-bytecode-generator.cc
diff --git a/test/cctest/interpreter/test-bytecode-generator.cc b/test/cctest/interpreter/test-bytecode-generator.cc
index 85c1c43874058dbfcc29eb75f95a21baf67504dd..22bd5133c6e7c00c4c5d6ed8aad7d0f3f4d322da 100644
--- a/test/cctest/interpreter/test-bytecode-generator.cc
+++ b/test/cctest/interpreter/test-bytecode-generator.cc
@@ -2371,6 +2371,27 @@ TEST(NewAndSpread) {
                      LoadGolden("NewAndSpread.golden")));
 }
 
+TEST(AsyncFunctions) {
+  InitializedIgnitionHandleScope scope;
+  BytecodeExpectationsPrinter printer(CcTest::isolate());
+  printer.set_wrap(false);
+  printer.set_test_function_name("f");
+
+  const char* snippets[] = {
+      "async function f() { }\n"
+      "f();\n",
+
+      "async function f() { await 42 }\n"
+      "f();\n",
+
+      "async function f() { for (let x of [42]) await x }\n"
+      "f();\n",
+  };
+
+  CHECK(CompareTexts(BuildActual(printer, snippets),
+                     LoadGolden("AsyncFunctions.golden")));
+}
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8