[testsuite/guality] Don't use attribute used in pr45882.c for -O0

2018-06-30  Tom de Vries  <tdevries@suse.de>

	* gcc.dg/guality/guality.exp (guality_transform_options): New proc.
	(toplevel): Apply guality_transform_options on DG_TORTURE_OPTIONS and
	LTO_TORTURE_OPTIONS.
	* gcc.dg/guality/prevent-optimization.h: New file.
	* gcc.dg/guality/pr45882.c: Include prevent-optimization.h.
	(a): Replace __attribute__((used)) with ATTRIBUTE_USED.

From-SVN: r262270

gcc/testsuite/ChangeLog

 2018-06-30  Tom de Vries  <tdevries@suse.de>
 
+	* gcc.dg/guality/guality.exp (guality_transform_options): New proc.
+	(toplevel): Apply guality_transform_options on DG_TORTURE_OPTIONS and
+	LTO_TORTURE_OPTIONS.
+	* gcc.dg/guality/prevent-optimization.h: New file.
+	* gcc.dg/guality/pr45882.c: Include prevent-optimization.h.
+	(a): Replace __attribute__((used)) with ATTRIBUTE_USED.
+
+2018-06-30  Tom de Vries  <tdevries@suse.de>
+
 	* gcc.dg/guality/pr45882.c (foo): Use relative line numbers.
 	* lib/gcc-dg.exp (dg-final): New proc.
 	* lib/gcc-gdb-test.exp (gdb-test): Add and handle additional line number

gcc/testsuite/gcc.dg/guality/guality.exp

@@ -48,6 +48,28 @@ if ![info exists ::env(GUALITY_GDB_NAME)] {
 }
 report_gdb $::env(GUALITY_GDB_NAME) [info script]
 
+proc guality_transform_options { args } {
+    set res [list]
+    foreach opt [lindex $args 0] {
+	#
+	if { ! [regexp -- "-O0" $opt] } {
+	    set opt "$opt -DPREVENT_OPTIMIZATION"
+	}
+	lappend res $opt
+    }
+
+    return $res
+}
+
+global DG_TORTURE_OPTIONS
+set guality_dg_torture_options [guality_transform_options $DG_TORTURE_OPTIONS]
+set guality_lto_torture_options [guality_transform_options $LTO_TORTURE_OPTIONS]
+torture-init
+set-torture-options \
+    $guality_dg_torture_options \
+    [list {}] \
+    $guality_lto_torture_options
+
 if {[check_guality "
   #include \"$srcdir/$subdir/guality.h\"
   volatile long int varl = 6;
@@ -65,4 +87,5 @@ if [info exists guality_gdb_name] {
     unsetenv GUALITY_GDB_NAME
 }
 
+torture-finish
 dg-finish

gcc/testsuite/gcc.dg/guality/pr45882.c

@@ -2,8 +2,10 @@
 /* { dg-do run } */
 /* { dg-options "-g" } */
 
+#include "prevent-optimization.h"
+
 extern void abort (void);
-int a[1024] __attribute__((used));
+int a[1024] ATTRIBUTE_USED;
 volatile short int v;
 
 __attribute__((noinline,noclone,used)) int

gcc/testsuite/gcc.dg/guality/prevent-optimization.h

+/* Copyright (C) 2018 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef PREVENT_OPTIMIZATION_H
+#define PREVENT_OPTIMIZATION_H
+
+#ifdef PREVENT_OPTIMIZATION
+#define ATTRIBUTE_USED __attribute__((used))
+#else
+#define ATTRIBUTE_USED
+#endif
+
+#endif