[compiler] Sidestep the interpreter for generator functions.

src/compiler.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler.h"
 
 #include <algorithm>
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 766 matching lines @@
   return true;
 }
 
 
 static bool UseIgnition(CompilationInfo* info) {
   // Cannot use Ignition when the {function_data} is already used.
   if (info->has_shared_info() && info->shared_info()->HasBuiltinFunctionId()) {
     return false;
   }
 
+  // TODO(4681): Generators are not yet supported.
+  if (info->has_shared_info() && info->shared_info()->is_generator()) {
+    return false;
+  }
+
   // Checks whether top level functions should be passed by the filter.
   if (info->closure().is_null()) {
     Vector<const char> filter = CStrVector(FLAG_ignition_filter);
     return (filter.length() == 0) || (filter.length() == 1 && filter[0] == '*');
   }
 
   // Finally respect the filter.
   return info->closure()->PassesFilter(FLAG_ignition_filter);
 }
 
@@ skipping 1155 matching lines @@
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate()).PrintProgram(literal()));
 }
 #endif
 
 }  // namespace internal
 }  // namespace v8