ipa-chkp.c (chkp_maybe_create_clone): Create alias reference when cloning alias node.

gcc/

	* ipa-chkp.c (chkp_maybe_create_clone): Create alias
	reference when cloning alias node.

gcc/testsuite/

	* gcc.dg/lto/chkp-removed-alias_0.c: New.

From-SVN: r224074

gcc/ChangeLog

+2015-06-03  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	* ipa-chkp.c (chkp_maybe_create_clone): Create alias
+	reference when cloning alias node.
+
 2015-06-03  Martin Liska  <mliska@suse.cz>
 
 	* alloc-pool.h (struct pool_usage): Correct space padding.

gcc/ipa-chkp.c

@@ -616,12 +616,7 @@ chkp_maybe_create_clone (tree fndecl)
 
       /* Clone all aliases.  */
       for (i = 0; node->iterate_direct_aliases (i, ref); i++)
-	{
-	  struct cgraph_node *alias = dyn_cast <cgraph_node *> (ref->referring);
-	  struct cgraph_node *chkp_alias
-	    = chkp_maybe_create_clone (alias->decl);
-	  chkp_alias->create_reference (clone, IPA_REF_ALIAS, NULL);
-	}
+	chkp_maybe_create_clone (ref->referring->decl);
 
       /* Clone all thunks.  */
       for (e = node->callers; e; e = e->next_caller)
@@ -645,7 +640,10 @@ chkp_maybe_create_clone (tree fndecl)
 
 	  ref = node->ref_list.first_reference ();
 	  if (ref)
-	    chkp_maybe_create_clone (ref->referred->decl);
+	    {
+	      target = chkp_maybe_create_clone (ref->referred->decl);
+	      clone->create_reference (target, IPA_REF_ALIAS);
+	    }
 
 	  if (node->alias_target)
 	    {

gcc/testsuite/ChangeLog

 2015-06-03  Ilya Enkovich  <ilya.enkovich@intel.com>
 
+	* gcc.dg/lto/chkp-removed-alias_0.c: New.
+
+2015-06-03  Ilya Enkovich  <ilya.enkovich@intel.com>
+
 	* gcc.dg/lto/chkp-privatize-1_0.c: New.
 	* gcc.dg/lto/chkp-privatize-1_1.c: New.
 	* gcc.dg/lto/chkp-privatize-2_0.c: New.

gcc/testsuite/gcc.dg/lto/chkp-removed-alias_0.c

+/* { dg-lto-do link } */
+/* { dg-require-effective-target mpx } */
+/* { dg-lto-options { { -O2 -flto -flto-partition=max -fcheck-pointer-bounds -mmpx } } } */
+
+int test1 (const char *c)
+{
+  return c[0] * 2;
+}
+
+int test2 (const char *c)
+{
+  return c[1] * 3;
+}
+
+int test1_alias (const char *c) __attribute__ ((alias ("test1")));
+int test2_alias (const char *c) __attribute__ ((alias ("test2")));
+
+struct S
+{
+  int (*fnptr[2]) (const char *);
+} S;
+
+struct S s = {test1_alias, test2_alias};
+
+int main (int argc, const char **argv)
+{
+  return s.fnptr[argc] (argv[0]);
+}