Reset scev before invoking array_checker.

Before invoking the array_checker, we need to reset scev so it will not try to
access any ssa_names that the substitute and fold engine has freed.

	PR tree-optimization/102940
	* tree-vrp.c (execute_ranger_vrp): Reset scev.

diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c
index 38ea503..dc3e250 100644 (file)
--- a/gcc/tree-vrp.c
+++ b/gcc/tree-vrp.c
@@ -4351,7 +4351,6 @@ execute_ranger_vrp (struct function *fun, bool warn_array_bounds_p)
   if (dump_file && (dump_flags & TDF_DETAILS))
     ranger->dump (dump_file);
 
-
   if (warn_array_bounds && warn_array_bounds_p)
     {
       // Set all edges as executable, except those ranger says aren't.
@@ -4367,6 +4366,7 @@ execute_ranger_vrp (struct function *fun, bool warn_array_bounds_p)
            else
              e->flags |= EDGE_EXECUTABLE;
        }
+      scev_reset ();
       array_bounds_checker array_checker (fun, ranger);
       array_checker.check ();
     }