Do not handled volatile arguments (PR sanitizer/82484).

2018-03-01  Martin Liska  <mliska@suse.cz>

	PR sanitizer/82484
	* sanopt.c (sanitize_rewrite_addressable_params): Do not handle
	volatile arguments.
2018-03-01  Martin Liska  <mliska@suse.cz>

	PR sanitizer/82484
	* gcc.dg/asan/pr82484.c: New test.

From-SVN: r258101

gcc/ChangeLog

+2018-03-01  Martin Liska  <mliska@suse.cz>
+
+	PR sanitizer/82484
+	* sanopt.c (sanitize_rewrite_addressable_params): Do not handle
+	volatile arguments.
+
 2018-03-01  Richard Biener  <rguenther@suse.de>
 
 	PR debug/84645

gcc/sanopt.c

@@ -1143,7 +1143,9 @@ sanitize_rewrite_addressable_params (function *fun)
        arg; arg = DECL_CHAIN (arg))
     {
       tree type = TREE_TYPE (arg);
-      if (TREE_ADDRESSABLE (arg) && !TREE_ADDRESSABLE (type)
+      if (TREE_ADDRESSABLE (arg)
+	  && !TREE_ADDRESSABLE (type)
+	  && !TREE_THIS_VOLATILE (arg)
 	  && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST)
 	{
 	  TREE_ADDRESSABLE (arg) = 0;

gcc/testsuite/ChangeLog

+2018-03-01  Martin Liska  <mliska@suse.cz>
+
+	PR sanitizer/82484
+	* gcc.dg/asan/pr82484.c: New test.
+
 2018-03-01  Richard Biener  <rguenther@suse.de>
 
 	PR debug/84645

gcc/testsuite/gcc.dg/asan/pr82484.c

+/* PR sanitizer/82484 */
+/* { dg-do compile } */
+
+void foo(volatile int *ptr);
+void a (volatile int b) { foo(&b); }