re PR ipa/65318 (wrong code at -Os and above on x86_64-linux-gnu)

	PR ipa/65318
	* ipa-icf.c (sem_variable::equals): Compare variables types.
	* gcc.dg/ipa/pr65318.c: New test.

From-SVN: r221221

gcc/ChangeLog

+2015-03-05  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/65318
+	* ipa-icf.c (sem_variable::equals): Compare variables types.
+
 2015-03-05  Alex Velenko  <alex.velenko@arm.com>
 
 	* config/arm/arm.c (arm_function_in_section_p): Fix predicate to

gcc/ipa-icf.c

@@ -1501,6 +1501,11 @@ sem_variable::equals (sem_item *item,
   if (DECL_INITIAL (item->decl) == error_mark_node && in_lto_p)
     dyn_cast <varpool_node *>(item->node)->get_constructor ();
 
+  /* As seen in PR ipa/65303 we have to compare variables types.  */
+  if (!func_checker::compatible_types_p (TREE_TYPE (decl),
+					 TREE_TYPE (item->decl)))
+    return return_false_with_msg ("variables types are different");
+
   ret = sem_variable::equals (DECL_INITIAL (decl),
 			      DECL_INITIAL (item->node->decl));
   if (dump_file && (dump_flags & TDF_DETAILS))

gcc/testsuite/ChangeLog

+2015-03-05  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/65318
+	* gcc.dg/ipa/pr65318.c: New test.
+
 2015-03-05  Marek Polacek  <polacek@redhat.com>
 
 	* c-c++-common/ubsan/bounds-6.c: Use dg-do run.

gcc/testsuite/gcc.dg/ipa/pr65318.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-ipa-icf-details"  } */
+
+static short a = 0;
+short b = -1;
+static unsigned short c = 0;
+
+int
+main ()
+{
+  if (a <= b)
+   return 1;
+
+  return 0;
+}
+
+/* { dg-final { scan-ipa-dump "Equal symbols: 0" "icf"  } } */
+/* { dg-final { cleanup-ipa-dump "icf" } } */