Try to make the contextuality check in the IC code faster...

bleeding_edge/src/ic.cc

Index: bleeding_edge/src/ic.cc
===================================================================
--- bleeding_edge/src/ic.cc	(revision 3458)
+++ bleeding_edge/src/ic.cc	(working copy)
@@ -409,7 +409,7 @@
   if (!lookup.IsValid()) {
     // If the object does not have the requested property, check which
     // exception we need to throw.
-    if (is_contextual()) {
+    if (IsContextual(object)) {
       return ReferenceError("not_defined", name);
     }
     return TypeError("undefined_method", object, name);
@@ -428,7 +428,7 @@
     // If the object does not have the requested property, check which
     // exception we need to throw.
     if (attr == ABSENT) {
-      if (is_contextual()) {
+      if (IsContextual(object)) {
         return ReferenceError("not_defined", name);
       }
       return TypeError("undefined_method", object, name);
@@ -628,7 +628,7 @@
 
   // If lookup is invalid, check if we need to throw an exception.
   if (!lookup.IsValid()) {
-    if (FLAG_strict || is_contextual()) {
+    if (FLAG_strict || IsContextual(object)) {
       return ReferenceError("not_defined", name);
     }
     LOG(SuspectReadEvent(*name, *object));
@@ -671,7 +671,7 @@
     if (result->IsFailure()) return result;
     // If the property is not present, check if we need to throw an
     // exception.
-    if (attr == ABSENT && is_contextual()) {
+    if (attr == ABSENT && IsContextual(object)) {
       return ReferenceError("not_defined", name);
     }
     return result;
@@ -843,7 +843,7 @@
 
     // If lookup is invalid, check if we need to throw an exception.
     if (!lookup.IsValid()) {
-      if (FLAG_strict || is_contextual()) {
+      if (FLAG_strict || IsContextual(object)) {
         return ReferenceError("not_defined", name);
       }
     }
@@ -859,7 +859,7 @@
       if (result->IsFailure()) return result;
       // If the property is not present, check if we need to throw an
       // exception.
-      if (attr == ABSENT && is_contextual()) {
+      if (attr == ABSENT && IsContextual(object)) {
         return ReferenceError("not_defined", name);
       }
       return result;