From 752098c83a84a75dc1fc565cfa12e1ede3ad149a Mon Sep 17 00:00:00 2001
From: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 2 Jul 2014 15:23:56 +0000
Subject: [PATCH] 	* c-decl.c (duplicate_decls): CLear
 DECL_STRUCT_FUNCTION before 	releasing symbol.

	* gcc.c-torture/compile/section.c: New testcase.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@212234 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/c/ChangeLog                               | 6 ++++++
 gcc/c/c-decl.c                                | 9 ++++++++-
 gcc/testsuite/ChangeLog                       | 5 +++++
 gcc/testsuite/gcc.c-torture/compile/section.c | 8 ++++++++
 4 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.c-torture/compile/section.c

diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index 1c1936245d8..68abca4dfb1 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,9 @@
+2014-07-02  Jan Hubicka  <hubicka@ucw.cz>
+	    Chen Gang <gang.chen.5i5j@gmail.com>
+
+	* c-decl.c (duplicate_decls): CLear DECL_STRUCT_FUNCTION before
+	releasing symbol.
+
 2014-07-01  Marek Polacek  <polacek@redhat.com>
 
 	* c-typeck.c (convert_for_assignment): Pass OPT_Wint_conversion
diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c
index 7c37edfd372..3dec90b23ed 100644
--- a/gcc/c/c-decl.c
+++ b/gcc/c/c-decl.c
@@ -2575,7 +2575,14 @@ duplicate_decls (tree newdecl, tree olddecl)
 
   merge_decls (newdecl, olddecl, newtype, oldtype);
 
-  /* The NEWDECL will no longer be needed.  */
+  /* The NEWDECL will no longer be needed.
+
+     Before releasing the node, be sure to remove function from symbol
+     table that might have been inserted there to record comdat group.
+     Be sure to however do not free DECL_STRUCT_FUNCTION because this
+     structure is shared in between NEWDECL and OLDECL.  */
+  if (TREE_CODE (newdecl) == FUNCTION_DECL)
+    DECL_STRUCT_FUNCTION (newdecl) = NULL;
   if (TREE_CODE (newdecl) == FUNCTION_DECL
       || TREE_CODE (newdecl) == VAR_DECL)
     {
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 1195959ff2d..286898309fa 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2014-07-02  Jan Hubicka  <hubicka@ucw.cz>
+	    Chen Gang <gang.chen.5i5j@gmail.com>
+
+	* gcc.c-torture/compile/section.c: New testcase.
+ 
 2014-07-02  Christian Bruel  <christian.bruel@st.com>
 
 	PR target/29349
diff --git a/gcc/testsuite/gcc.c-torture/compile/section.c b/gcc/testsuite/gcc.c-torture/compile/section.c
new file mode 100644
index 00000000000..1e8d094068c
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/section.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+
+/* { dg-require-effective-target named_sections } */
+extern int __attribute__ ((__section__(".init.text"))) elv_register(void)
+{
+ return 0;
+}
+extern typeof(elv_register) elv_register;
-- 
2.11.4.GIT