* tree-ssa-loop-niter.c (compute_estimated_nb_iterations): Fix

	off-by-one error.
	(array_at_struct_end_p): New function.
	(idx_infer_loop_bounds): Use it.
	(estimate_numbers_of_iterations_loop): Export.
	* predict.c (predict_loops): Use estimated_loop_iterations_int.
	Do not use PRED_LOOP_EXIT on exits predicted by # of iterations.
	(tree_estimate_probability): Call record_loop_exits.
	* tree-data-ref.c (get_number_of_iters_for_loop): Replaced by ...
	(estimated_loop_iterations, estimated_loop_iterations_int,
	estimated_loop_iterations_tree): New functions.
	(analyze_siv_subscript_cst_affine,
	compute_overlap_steps_for_affine_1_2,
	analyze_subscript_affine_affine): Use estimated_loop_iterations_int.
	(analyze_miv_subscript): Use estimated_loop_iterations_tree.
	* predict.def (PRED_LOOP_ITERATIONS): Update comment.
	(PRED_LOOP_ITERATIONS_GUESSED): New.
	* cfgloop.c (record_loop_exits): Do nothing if there are no loops.
	* cfgloop.h (estimate_numbers_of_iterations_loop,
	estimated_loop_iterations_int): Declare.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@122316 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 3 insertions, 0 deletions

diff --git a/gcc/cfgloop.c b/gcc/cfgloop.c
index 62ee79c6cd1..12ce92cdd9e 100644
--- a/gcc/cfgloop.c
+++ b/gcc/cfgloop.c
@@ -1038,6 +1038,9 @@ record_loop_exits (void)
   edge_iterator ei;
   edge e;
 
+  if (!current_loops)
+    return;
+
   if (current_loops->state & LOOPS_HAVE_RECORDED_EXITS)
     return;
   current_loops->state |= LOOPS_HAVE_RECORDED_EXITS;