2009-06-21 Richard Guenther <rguenther@suse.de>
PR tree-optimization/38729
* tree-ssa-loop-niter.c (find_loop_niter_by_eval): Restrict
to loops with a single exit if -fno-expensive-optimizations.
From-SVN: r148761
+2009-06-21 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/38729
+ * tree-ssa-loop-niter.c (find_loop_niter_by_eval): Restrict
+ to loops with a single exit if -fno-expensive-optimizations.
+
2009-06-21 Jakub Jelinek <jakub@redhat.com>
* var-tracking.c (struct shared_hash_def, shared_hash): New types.
tree niter = NULL_TREE, aniter;
*exit = NULL;
+
+ /* Loops with multiple exits are expensive to handle and less important. */
+ if (!flag_expensive_optimizations
+ && VEC_length (edge, exits) > 1)
+ return chrec_dont_know;
+
for (i = 0; VEC_iterate (edge, exits, i, ex); i++)
{
if (!just_once_each_iteration_p (loop, ex->src))