PR tree-optimization/46355
* tree-loop-distribution.c (tree_loop_distribution): Do not
distribute loops without a single exit.
* gcc.dg/pr46355.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@166498
138bc75d-0d04-0410-961f-
82ee72b054a4
+2010-11-09 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/46355
+ * tree-loop-distribution.c (tree_loop_distribution): Do not
+ distribute loops without a single exit.
+
2010-11-09 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
PR rtl-optimization/46237
2010-11-09 Richard Guenther <rguenther@suse.de>
+ PR tree-optimization/46355
+ * gcc.dg/pr46355.c: New testcase.
+
+2010-11-09 Richard Guenther <rguenther@suse.de>
+
PR tree-optimization/46177
* gcc.dg/pr46177-2.c: New testcase.
--- /dev/null
+/* { dg-do compile } */
+/* { dg-options "-O -ftree-loop-distribution -fstrict-overflow" } */
+
+void
+foo (int *dest, int i, int u, int v)
+{
+ int j = i;
+ while (i)
+ {
+ dest[j--] = v;
+ dest[j--] = u;
+ }
+}
+
FOR_EACH_LOOP (li, loop, 0)
{
- VEC (gimple, heap) *work_list = VEC_alloc (gimple, heap, 3);
+ VEC (gimple, heap) *work_list = NULL;
+
+ /* If the loop doesn't have a single exit we will fail anyway,
+ so do that early. */
+ if (!single_exit (loop))
+ continue;
/* If both flag_tree_loop_distribute_patterns and
flag_tree_loop_distribution are set, then only