--- a/hotspot/src/share/vm/classfile/vmSymbols.hpp	Fri Mar 20 11:41:34 2015 -0700
+++ b/hotspot/src/share/vm/classfile/vmSymbols.hpp	Fri Mar 20 11:41:34 2015 -0700
@@ -868,9 +868,12 @@
                                                                                                                         \
   /* Custom branch frequencies profiling support for JSR292 */                                                          \
   do_class(java_lang_invoke_MethodHandleImpl,               "java/lang/invoke/MethodHandleImpl")                        \
-  do_intrinsic(_profileBoolean, java_lang_invoke_MethodHandleImpl, profileBoolean_name, profileBoolean_signature,    F_S)  \
-   do_name(     profileBoolean_name,                               "profileBoolean")                                     \
-   do_signature(profileBoolean_signature,                           "(Z[I)Z")                                            \
+  do_intrinsic(_profileBoolean, java_lang_invoke_MethodHandleImpl, profileBoolean_name, profileBoolean_signature, F_S)  \
+   do_name(     profileBoolean_name,                             "profileBoolean")                                      \
+   do_signature(profileBoolean_signature,                        "(Z[I)Z")                                              \
+  do_intrinsic(_isCompileConstant, java_lang_invoke_MethodHandleImpl, isCompileConstant_name, isCompileConstant_signature, F_S) \
+   do_name(     isCompileConstant_name,                          "isCompileConstant")                                   \
+   do_alias(    isCompileConstant_signature,                      object_boolean_signature)                             \
                                                                                                                         \
   /* unsafe memory references (there are a lot of them...) */                                                           \
   do_signature(getObject_signature,       "(Ljava/lang/Object;J)Ljava/lang/Object;")                                    \

--- a/hotspot/src/share/vm/opto/library_call.cpp	Fri Mar 20 11:41:34 2015 -0700
+++ b/hotspot/src/share/vm/opto/library_call.cpp	Fri Mar 20 11:41:34 2015 -0700
@@ -290,6 +290,7 @@
   bool inline_multiplyToLen();
 
   bool inline_profileBoolean();
+  bool inline_isCompileConstant();
 };
 
 
@@ -900,6 +901,8 @@
 
   case vmIntrinsics::_profileBoolean:
     return inline_profileBoolean();
+  case vmIntrinsics::_isCompileConstant:
+    return inline_isCompileConstant();
 
   default:
     // If you get here, it may be that someone has added a new intrinsic
@@ -5888,3 +5891,9 @@
     return false;
   }
 }
+
+bool LibraryCallKit::inline_isCompileConstant() {
+  Node* n = argument(0);
+  set_result(n->is_Con() ? intcon(1) : intcon(0));
+  return true;
+}