re PR ipa/61144 (Invalid optimizations for extern vars with local weak definitions)

	PR ipa/61144
	* gcc.dg/tree-ssa/pr61144.c: New testcase.

From-SVN: r215897

gcc/testsuite/ChangeLog

 2014-10-04  Jan Hubicka  <hubicka@ucw.cz>
 
+	PR ipa/61144
+	* gcc.dg/tree-ssa/pr61144.c: New testcase.
+
+2014-10-04  Jan Hubicka  <hubicka@ucw.cz>
+
 	* g++.dg/ipa/devirt-46.C: New testcase.
 
 2014-10-04  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>

gcc/testsuite/gcc.dg/tree-ssa/pr61144.c

+/* { dg-do compile } */
+/* { dg-require-weak "" } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+static int dummy = 0;
+extern int foo __attribute__((__weak__, __alias__("dummy")));
+int bar() { if (foo) return 1; return 0; }
+/* { dg-final { scan-tree-dump-not "return 0" "optimized"} } */