Initial shot at deoptimizing JSCallFunction in Turbofan.

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index fe4fe652760b071f6bcc1d949abfa35ae0ed1e2b..82d01ed8517dbf1ac8a05e686df93870ee5effaa 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -349,18 +349,22 @@ void JSGenericLowering::ReplaceWithBuiltinCall(Node* node,
 }
 
 
+static CallDescriptor::DeoptimizationSupport DeoptimizationSupportForNode(
+    Node* node) {
+  return OperatorProperties::CanLazilyDeoptimize(node->op())
+             ? CallDescriptor::kCanDeoptimize
+             : CallDescriptor::kCannotDeoptimize;
+}
+
+
 void JSGenericLowering::ReplaceWithRuntimeCall(Node* node,
                                                Runtime::FunctionId f,
                                                int nargs_override) {
   Operator::Property props = node->op()->properties();
   const Runtime::Function* fun = Runtime::FunctionForId(f);
   int nargs = (nargs_override < 0) ? fun->nargs : nargs_override;
-  CallDescriptor::DeoptimizationSupport deopt =
-      OperatorProperties::CanLazilyDeoptimize(node->op())
-          ? CallDescriptor::kCanDeoptimize
-          : CallDescriptor::kCannotDeoptimize;
-  CallDescriptor* desc =
-      linkage()->GetRuntimeCallDescriptor(f, nargs, props, deopt);
+  CallDescriptor* desc = linkage()->GetRuntimeCallDescriptor(
+      f, nargs, props, DeoptimizationSupportForNode(node));
   Node* ref = ExternalConstant(ExternalReference(f, isolate()));
   Node* arity = Int32Constant(nargs);
   if (!centrystub_constant_.is_set()) {
@@ -544,7 +548,8 @@ Node* JSGenericLowering::LowerJSCallFunction(Node* node) {
   CallParameters p = OpParameter<CallParameters>(node);
   CallFunctionStub stub(isolate(), p.arity - 2, p.flags);
   CodeStubInterfaceDescriptor* d = GetInterfaceDescriptor(isolate(), &stub);
-  CallDescriptor* desc = linkage()->GetStubCallDescriptor(d, p.arity - 1);
+  CallDescriptor* desc = linkage()->GetStubCallDescriptor(
+      d, p.arity - 1, DeoptimizationSupportForNode(node));
   Node* stub_code = CodeConstant(stub.GetCode());
   PatchInsertInput(node, 0, stub_code);
   PatchOperator(node, common()->Call(desc));