[turbofan] Some javascript operators are globally shared singletons.

src/compiler/js-context-specialization.cc

Index: src/compiler/js-context-specialization.cc
diff --git a/src/compiler/js-context-specialization.cc b/src/compiler/js-context-specialization.cc
index cd8932b29895b308df24a9349f669595c20340d8..196a750acf598aaa520ad980b63688811671b47d 100644
--- a/src/compiler/js-context-specialization.cc
+++ b/src/compiler/js-context-specialization.cc
@@ -67,7 +67,7 @@ Reduction JSContextSpecializer::ReduceJSLoadContext(Node* node) {
     return Reducer::NoChange();
   }
 
-  ContextAccess access = OpParameter<ContextAccess>(node);
+  const ContextAccess& access = ContextAccessOf(node->op());
 
   // Find the right parent context.
   Context* context = *m.Value().handle();
@@ -82,7 +82,7 @@ Reduction JSContextSpecializer::ReduceJSLoadContext(Node* node) {
       return Reducer::NoChange();
     }
     const Operator* op = jsgraph_->javascript()->LoadContext(
-        0, access.index(), access.immutable());
+        ContextAccess(0, access.index(), access.immutable()));
     node->set_op(op);
     Handle<Object> context_handle = Handle<Object>(context, info_->isolate());
     node->ReplaceInput(0, jsgraph_->Constant(context_handle));
@@ -115,7 +115,7 @@ Reduction JSContextSpecializer::ReduceJSStoreContext(Node* node) {
     return Reducer::NoChange();
   }
 
-  ContextAccess access = OpParameter<ContextAccess>(node);
+  const ContextAccess& access = ContextAccessOf(node->op());
 
   // The access does not have to look up a parent, nothing to fold.
   if (access.depth() == 0) {
@@ -128,7 +128,8 @@ Reduction JSContextSpecializer::ReduceJSStoreContext(Node* node) {
     context = context->previous();
   }
 
-  const Operator* op = jsgraph_->javascript()->StoreContext(0, access.index());
+  const Operator* op =
+      jsgraph_->javascript()->StoreContext(ContextAccess(0, access.index()));
   node->set_op(op);
   Handle<Object> new_context_handle = Handle<Object>(context, info_->isolate());
   node->ReplaceInput(0, jsgraph_->Constant(new_context_handle));