re PR rtl-optimization/41928 (segfault at gcc/bitmap.c:297)

2009-11-08  Richard Guenther  <rguenther@suse.de>

	PR rtl-optimization/41928
	* loop-invariant.c (free_loop_data): If we didn't allocate
	loop data do not try to free it.

	* gfortran.dg/pr41928.f90: New testcase.

From-SVN: r154008

gcc/ChangeLog

+2009-11-08  Richard Guenther  <rguenther@suse.de>
+
+	PR rtl-optimization/41928
+	* loop-invariant.c (free_loop_data): If we didn't allocate
+	loop data do not try to free it.
+
 2009-11-07  Jason Merrill  <jason@redhat.com>
 
 	* tree.c (reconstruct_complex_type): Preserve attributes.

gcc/loop-invariant.c

@@ -1564,6 +1564,8 @@ static void
 free_loop_data (struct loop *loop)
 {
   struct loop_data *data = LOOP_DATA (loop);
+  if (!data)
+    return;
 
   bitmap_clear (&LOOP_DATA (loop)->regs_ref);
   bitmap_clear (&LOOP_DATA (loop)->regs_live);

gcc/testsuite/ChangeLog

+2009-11-08  Richard Guenther  <rguenther@suse.de>
+
+	PR rtl-optimization/41928
+	* gfortran.dg/pr41928.f90: New testcase.
+
 2009-11-07  Jason Merrill  <jason@redhat.com>
 
 	PR c++/18451