[PATCH] Fix PR86637

[Richard Biener]

SLP vectorization forgot to reset vect_location which then "leaks"
to autopar eventually accessing stale data.

Committed to trunk.

Richard.

2018-12-05  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/86637
        * tree-vectorizer.c (pass_slp_vectorize::execute): Reset
        vect_location at the end.

diff --git a/gcc/tree-vectorizer.c b/gcc/tree-vectorizer.c
index 0a4eca51ad7..1a6cb56a872 100644
--- a/gcc/tree-vectorizer.c
+++ b/gcc/tree-vectorizer.c
@@ -1303,6 +1303,8 @@ pass_slp_vectorize::execute (function *fun)
       loop_optimizer_finalize ();
     }
 
+  vect_location = dump_user_location_t ();
+
   return 0;
 }