Enable addressable params sanitization with --param asan-stack=1.

2017-07-04  Martin Liska  <mliska@suse.cz>

	PR sanitizer/81040
	* sanopt.c (sanitize_rewrite_addressable_params): Mark the
	newly created variable as DECL_IGNORED_P.
2017-07-04  Martin Liska  <mliska@suse.cz>

	PR sanitizer/81040
	* g++.dg/asan/function-argument-1.C: Run the test-case w/o
	use-after-scope sanitization.

From-SVN: r249960

gcc/ChangeLog

 2017-07-04  Martin Liska  <mliska@suse.cz>
 
+	PR sanitizer/81040
+	* sanopt.c (sanitize_rewrite_addressable_params): Mark the
+	newly created variable as DECL_IGNORED_P.
+
+2017-07-04  Martin Liska  <mliska@suse.cz>
+
 	PR ipa/81293
 	* ipa-inline.c (inline_small_functions):
 	Use xstrdup_for_dump.

gcc/sanopt.c

@@ -905,7 +905,7 @@ sanitize_rewrite_addressable_params (function *fun)
 	  tree var = build_decl (DECL_SOURCE_LOCATION (arg),
 				 VAR_DECL, DECL_NAME (arg), type);
 	  TREE_ADDRESSABLE (var) = 1;
-	  DECL_ARTIFICIAL (var) = 1;
+	  DECL_IGNORED_P (var) = 1;
 
 	  gimple_add_tmp_var (var);
 

gcc/testsuite/ChangeLog

+2017-07-04  Martin Liska  <mliska@suse.cz>
+
+	PR sanitizer/81040
+	* g++.dg/asan/function-argument-1.C: Run the test-case w/o
+	use-after-scope sanitization.
+
 2017-07-04  Jakub Jelinek  <jakub@redhat.com>
 
 	* g++.dg/asan/function-argument-3.C: Add -Wno-psabi to additional

gcc/testsuite/g++.dg/asan/function-argument-1.C

 // { dg-do run }
 // { dg-shouldfail "asan" }
+// { dg-options "-fsanitize=address -fno-sanitize-address-use-after-scope" }
 
 struct A
 {