[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..ed76f11fd59d18e912fb1ce78d5339e47d6ce875 100644
--- a/src/compiler/js-context-specialization.cc
+++ b/src/compiler/js-context-specialization.cc
@@ -67,11 +67,11 @@ 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();
-  for (int i = access.depth(); i > 0; --i) {
+  for (size_t i = access.depth(); i > 0; --i) {
     context = context->previous();
   }
 
@@ -88,8 +88,8 @@ Reduction JSContextSpecializer::ReduceJSLoadContext(Node* node) {
     node->ReplaceInput(0, jsgraph_->Constant(context_handle));
     return Reducer::Changed(node);
   }
-  Handle<Object> value =
-      Handle<Object>(context->get(access.index()), info_->isolate());
+  Handle<Object> value = Handle<Object>(
+      context->get(static_cast<int>(access.index())), info_->isolate());
 
   // Even though the context slot is immutable, the context might have escaped
   // before the function to which it belongs has initialized the slot.
@@ -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) {
@@ -124,7 +124,7 @@ Reduction JSContextSpecializer::ReduceJSStoreContext(Node* node) {
 
   // Find the right parent context.
   Context* context = *m.Value().handle();
-  for (int i = access.depth(); i > 0; --i) {
+  for (size_t i = access.depth(); i > 0; --i) {
     context = context->previous();
   }