Make FastNewFunctionContextStub take slots parameter

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-factory.h"
 #include "src/code-stubs.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 428 matching lines @@
                                      ? Runtime::kNewClosure_Tenured
                                      : Runtime::kNewClosure);
   }
 }
 
 
 void JSGenericLowering::LowerJSCreateFunctionContext(Node* node) {
   int const slot_count = OpParameter<int>(node->op());
   CallDescriptor::Flags flags = AdjustFrameStatesForCall(node);
 
-  // Use the FastNewFunctionContextStub only for function contexts up maximum
-  // size.
-  if (slot_count <= FastNewFunctionContextStub::kMaximumSlots) {
-    Callable callable = CodeFactory::FastNewContext(isolate(), slot_count);
-    ReplaceWithStubCall(node, callable, flags);
-  } else {
-    ReplaceWithRuntimeCall(node, Runtime::kNewFunctionContext);
-  }
+  Callable callable = CodeFactory::FastNewFunctionContext(isolate());
+  node->InsertInput(zone(), 1, jsgraph()->Int32Constant(slot_count));
+  ReplaceWithStubCall(node, callable, flags);
 }
 
 
 void JSGenericLowering::LowerJSCreateIterResultObject(Node* node) {
   ReplaceWithRuntimeCall(node, Runtime::kCreateIterResultObject);
 }
 
 
 void JSGenericLowering::LowerJSCreateLiteralArray(Node* node) {
   CreateLiteralParameters const& p = CreateLiteralParametersOf(node->op());
@@ skipping 225 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8