From: Jan Hubicka <hubicka@ucw.cz>
Date: Wed, 2 Jul 2014 15:23:56 +0000 (+0200)
Subject: c-decl.c (duplicate_decls): CLear DECL_STRUCT_FUNCTION before releasing symbol.
X-Git-Tag: releases/gcc-5.1.0~6524
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=22e1cf1ced6f9e72cf7d4dad64747b8303221fda;p=thirdparty%2Fgcc.git

c-decl.c (duplicate_decls): CLear DECL_STRUCT_FUNCTION before releasing symbol.

	* c-decl.c (duplicate_decls): CLear DECL_STRUCT_FUNCTION before
	releasing symbol.

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

Co-Authored-By: Chen Gang <gang.chen.5i5j@gmail.com>

From-SVN: r212234
---

diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index 1c1936245d86..68abca4dfb1e 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 7c37edfd3728..3dec90b23ed5 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 1195959ff2d1..286898309fa2 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 000000000000..1e8d094068c6
--- /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;