Allow Turbofan optimization of Ignition generators

src/runtime/runtime-generator.cc

 // Copyright 2014 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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/factory.h"
 #include "src/frames-inl.h"
 #include "src/objects-inl.h"
@@ skipping 111 matching lines @@
 // Returns resume mode of generator activation.
 RUNTIME_FUNCTION(Runtime_GeneratorGetResumeMode) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
 
   return Smi::FromInt(generator->resume_mode());
 }
 
 
-// Returns generator continuation as a PC offset, or the magic -1 or 0 values.
+RUNTIME_FUNCTION(Runtime_GeneratorSetContext) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+
+  generator->set_context(isolate->context());
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(Runtime_GeneratorGetContinuation) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
 
   return Smi::FromInt(generator->continuation());
 }
 
 
+RUNTIME_FUNCTION(Runtime_GeneratorSetContinuation) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 2);
+  CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Smi, continuation, 1);

[Benedikt Meurer, 2016/05/10 10:32:08]

Use CONVERT_SMI_ARG_CHECKED here.

[neis, 2016/05/10 11:32:06]

Done.

+
+  generator->set_continuation(continuation->value());
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(Runtime_GeneratorReadRegister) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 2);
+  CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Smi, index, 1);

[Benedikt Meurer, 2016/05/10 10:32:08]

Use CONVERT_SMI_ARG_CHECKED here.

[neis, 2016/05/10 11:32:06]

Done.

+
+  DCHECK(FLAG_ignition && FLAG_ignition_generators);
+  DCHECK(generator->function()->shared()->HasBytecodeArray());
+
+  return generator->operand_stack()->get(index->value());
+}
+
+
+RUNTIME_FUNCTION(Runtime_GeneratorWriteRegister) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 3);
+  CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Smi, index, 1);

[Benedikt Meurer, 2016/05/10 10:32:08]

Use CONVERT_SMI_ARG_CHECKED here.

[neis, 2016/05/10 11:32:06]

Done.

+  CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
+
+  DCHECK(FLAG_ignition && FLAG_ignition_generators);
+  DCHECK(generator->function()->shared()->HasBytecodeArray());
+
+  generator->operand_stack()->set(index->value(), *value);
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(Runtime_GeneratorGetSourcePosition) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
 
   if (generator->is_suspended()) {
     Handle<Code> code(generator->function()->code(), isolate);
     int offset = generator->continuation();
     RUNTIME_ASSERT(0 <= offset && offset < code->instruction_size());
     return Smi::FromInt(code->SourcePosition(offset));
   }
 
   return isolate->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8