diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 36e48a223cc..4d1be8c4de3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR middle-end/40147
+	* ipa-utils.h (memory_identifier_string): Moved to ...
+	* tree.h (memory_identifier_string): Here.  Add GTY(()).
+
 2009-05-14  Paolo Bonzini  <bonzini@gnu.org>
 
 	* doc/tm.texi (TARGET_LEGITIMATE_ADDRESS_P): Refer mainly to this
diff --git a/gcc/ipa-utils.h b/gcc/ipa-utils.h
index 31d78374ff6..e70a01688e2 100644
--- a/gcc/ipa-utils.h
+++ b/gcc/ipa-utils.h
@@ -23,9 +23,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree.h"
 #include "cgraph.h"
 
-/* Used for parsing attributes of asm code.  */
-extern tree memory_identifier_string;
-
 struct ipa_dfs_info {
   int dfn_number;
   int low_link;
diff --git a/gcc/tree.h b/gcc/tree.h
index cb4b369cd63..eaa8e2ed8ff 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -5190,6 +5190,9 @@ extern unsigned HOST_WIDE_INT highest_pow2_factor (const_tree);
 
 void init_inline_once (void);
 
+/* In ipa-reference.c.  Used for parsing attributes of asm code.  */
+extern GTY(()) tree memory_identifier_string;
+
 /* Compute the number of operands in an expression node NODE.  For 
    tcc_vl_exp nodes like CALL_EXPRs, this is stored in the node itself,
    otherwise it is looked up from the node's code.  */