Revert last commit.

From-SVN: r253638

gcc/ChangeLog

 2017-10-11  Martin Liska  <mliska@suse.cz>
 
+	Revert r253637:
+
+	PR sanitizer/82484
+	* sanopt.c (sanitize_rewrite_addressable_params): Do not handle
+	volatile arguments.
+
+2017-10-11  Martin Liska  <mliska@suse.cz>
+
 	PR sanitizer/82484
 	* sanopt.c (sanitize_rewrite_addressable_params): Do not handle
 	volatile arguments.

gcc/sanopt.c

@@ -1140,9 +1140,7 @@ sanitize_rewrite_addressable_params (function *fun)
        arg; arg = DECL_CHAIN (arg))
     {
       tree type = TREE_TYPE (arg);
-      if (TREE_ADDRESSABLE (arg)
-	  && !TREE_ADDRESSABLE (type)
-	  && !TREE_THIS_VOLATILE (arg)
+      if (TREE_ADDRESSABLE (arg) && !TREE_ADDRESSABLE (type)
 	  && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST)
 	{
 	  TREE_ADDRESSABLE (arg) = 0;

gcc/testsuite/ChangeLog

 2017-10-11  Martin Liska  <mliska@suse.cz>
 
+	Revert r253637:
+
+	PR sanitizer/82484
+	* gcc.dg/asan/pr82484.c: New test.
+
+2017-10-11  Martin Liska  <mliska@suse.cz>
+
 	PR sanitizer/82484
 	* gcc.dg/asan/pr82484.c: New test.
 

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); }