Initial support for debugger frame state in Turbofan.

src/compiler/js-generic-lowering.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/code-stubs.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-aux-data-inl.h"
@@ skipping 270 matching lines @@
   }
 REPLACE_UNIMPLEMENTED(JSToString)
 REPLACE_UNIMPLEMENTED(JSToName)
 REPLACE_UNIMPLEMENTED(JSYield)
 REPLACE_UNIMPLEMENTED(JSDebugger)
 #undef REPLACE_UNIMPLEMENTED
 
 
 static CallDescriptor::DeoptimizationSupport DeoptimizationSupportForNode(
     Node* node) {
-  return OperatorProperties::CanLazilyDeoptimize(node->op())
-             ? CallDescriptor::kCanDeoptimize
-             : CallDescriptor::kCannotDeoptimize;
+  int result = CallDescriptor::kNoDeoptimization;
+  if (OperatorProperties::CanLazilyDeoptimize(node->op())) {
+    result |= CallDescriptor::kLazyDeoptimization;
+  }
+  if (OperatorProperties::HasFrameStateInput(node->op())) {
+    result |= CallDescriptor::kNeedsFrameState;
+  }
+  return static_cast<CallDescriptor::DeoptimizationSupport>(result);
 }
 
 
 void JSGenericLowering::ReplaceWithCompareIC(Node* node, Token::Value token,
                                              bool pure) {
   BinaryOpICStub stub(isolate(), Token::ADD);  // TODO(mstarzinger): Hack.
   CodeStubInterfaceDescriptor* d = stub.GetInterfaceDescriptor();
   CallDescriptor* desc_compare = linkage()->GetStubCallDescriptor(d);
   Handle<Code> ic = CompareIC::GetUninitialized(isolate(), token);
   Node* compare;
@@ skipping 231 matching lines @@
 
 Node* JSGenericLowering::LowerJSCallRuntime(Node* node) {
   Runtime::FunctionId function = OpParameter<Runtime::FunctionId>(node);
   int arity = OperatorProperties::GetValueInputCount(node->op());
   ReplaceWithRuntimeCall(node, function, arity);
   return node;
 }
 }
 }
 }  // namespace v8::internal::compiler