Do not handle VLA in sanitization (PR sanitizer/81460).

2017-07-28  Martin Liska  <mliska@suse.cz>

	PR sanitizer/81460
	* sanopt.c (sanitize_rewrite_addressable_params): Do not rewrite
	parameters that are of a variable-length.
2017-07-28  Martin Liska  <mliska@suse.cz>

	PR sanitizer/81460
	* gcc.dg/asan/pr81460.c: New test.

From-SVN: r250655

gcc/ChangeLog

+2017-07-28  Martin Liska  <mliska@suse.cz>
+
+	PR sanitizer/81460
+	* sanopt.c (sanitize_rewrite_addressable_params): Do not rewrite
+	parameters that are of a variable-length.
+
 2017-07-28  Sebastian Huber  <sebastian.huber@embedded-brains.de>
 
 	* config.gcc (powerpc-*-rtems*): Remove rs6000/eabi.h.  Add

gcc/sanopt.c

@@ -894,11 +894,12 @@ sanitize_rewrite_addressable_params (function *fun)
   for (tree arg = DECL_ARGUMENTS (current_function_decl);
        arg; arg = DECL_CHAIN (arg))
     {
-      if (TREE_ADDRESSABLE (arg) && !TREE_ADDRESSABLE (TREE_TYPE (arg)))
+      tree type = TREE_TYPE (arg);
+      if (TREE_ADDRESSABLE (arg) && !TREE_ADDRESSABLE (type)
+	  && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST)
 	{
 	  TREE_ADDRESSABLE (arg) = 0;
 	  /* The parameter is no longer addressable.  */
-	  tree type = TREE_TYPE (arg);
 	  has_any_addressable_param = true;
 
 	  /* Create a new automatic variable.  */

gcc/testsuite/ChangeLog

+2017-07-28  Martin Liska  <mliska@suse.cz>
+
+	PR sanitizer/81460
+	* gcc.dg/asan/pr81460.c: New test.
+
 2017-07-28  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/81578

gcc/testsuite/gcc.dg/asan/pr81460.c

+/* PR sanitizer/80460 */
+/* { dg-do compile } */
+
+int
+f (int a, struct { int b[a]; } c) /* { dg-warning "anonymous struct declared inside parameter list will not be visible outside of this definition or declaration" } */
+{
+  return c.b[0];
+}