Calling a generator function returns a generator object

src/arm/full-codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 282 matching lines @@
       Label ok;
       __ LoadRoot(ip, Heap::kStackLimitRootIndex);
       __ cmp(sp, Operand(ip));
       __ b(hs, &ok);
       PredictableCodeSizeScope predictable(masm_, 2 * Assembler::kInstrSize);
       StackCheckStub stub;
       __ CallStub(&stub);
       __ bind(&ok);
     }
 
+    if (function()->is_generator()) {
+      Comment cmnt(masm_, "[ Generator Iterator");
+      __ ldr(r2, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+      __ push(r2);
+      __ CallRuntime(Runtime::kCreateJSGeneratorIterator, 1);
+      // TODO(wingo): Suspend the generator.
+      EmitReturnSequence();
+    }
+
     { Comment cmnt(masm_, "[ Body");
       ASSERT(loop_depth() == 0);
       VisitStatements(function()->body());
       ASSERT(loop_depth() == 0);
     }
   }
 
   // Always emit a 'return undefined' in case control fell off the end of
   // the body.
   { Comment cmnt(masm_, "[ return <undefined>;");
@@ skipping 4270 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM