vect alignmet enhance TLC

This properly marks the loop as for a runtime alias peel rather
than (pointlessly) going through DR_MISALIGNMENT.

2021-09-20  Richard Biener  <rguenther@suse.de>

	* tree-vect-data-refs.c (vect_enhance_data_refs_alignment):
	Store -1 for runtime alias peeling iterations.

diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
index 967d437..1a7abe3 100644 (file)
--- a/gcc/tree-vect-data-refs.c
+++ b/gcc/tree-vect-data-refs.c
@@ -2268,8 +2268,7 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
           if (npeel)
             LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo) = npeel;
           else
-            LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo)
-             = DR_MISALIGNMENT (dr0_info);
+           LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo) = -1;
          SET_DR_MISALIGNMENT (dr0_info, 0);
          if (dump_enabled_p ())
             {