re PR rtl-optimization/12826 (Optimizer removes reference through volatile pointer)

PR opt/12826
	* gcc.dg/20040112-1.c: New.

	* gcc.dg/dwarf-die[1-7].c: Move to...
	* gcc.dg/debug/dwarf2/dwarf-die[1-7].c: ... here.
	* gcc.dg/debug/dwarf2/dwarf2.exp: New.

From-SVN: r75732

gcc/testsuite/ChangeLog

@@ -1,3 +1,12 @@
+2004-01-12  Jan Hubicka  <jh@suse.cz>
+
+	PR opt/12826
+	* gcc.dg/20040112-1.c: New.
+
+	* gcc.dg/dwarf-die[1-7].c: Move to...
+	* gcc.dg/debug/dwarf2/dwarf-die[1-7].c: ... here.
+	* gcc.dg/debug/dwarf2/dwarf2.exp: New.
+
 2004-01-12  Ian Lance Taylor  <ian@wasabisystems.com>
 
 	PR c++/4100

gcc/testsuite/gcc.dg/20040112-1.c

@@ -0,0 +1,15 @@
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2" } */
+/* { dg-final { scan-assembler "testb" } } */
+ftn (char *sp)
+{
+  char status;
+
+  while (1)
+    {
+      *sp = 0xE8;
+      status = *(volatile char *) sp;
+      if (status & 0x80)
+	break;
+    }
+}

gcc/testsuite/gcc.dg/debug/dwarf2/dwarf2.exp

@@ -0,0 +1,42 @@
+#   Copyright (C) 2002 Free Software Foundation, Inc.
+
+# This program 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 2 of the License, or
+# (at your option) any later version.
+# 
+# This program 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 this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
+
+# GCC testsuite that uses the `dg.exp' driver.
+
+# Load support procs.
+load_lib gcc-dg.exp
+
+# If a testcase doesn't have special options, use these.
+global DEFAULT_CFLAGS
+if ![info exists DEFAULT_CFLAGS] then {
+    set DEFAULT_CFLAGS " -ansi -pedantic-errors -gdwarf-2"
+}
+
+# Initialize `dg'.
+dg-init
+
+# Main loop.
+set comp_output [gcc_target_compile \
+    "$srcdir/$subdir/../trivial.c" "trivial.S" assembly \
+    "additional_flags=-gdwarf-2"]
+if { ! [string match "*: target system does not support the * debug format*" \
+    $comp_output] } {
+    dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/*.\[cS\]]] \
+	    "" $DEFAULT_CFLAGS
+}
+
+# All done.
+dg-finish