From: Andrew MacLeod <amacleod@redhat.com>
Date: Tue, 26 Oct 2021 18:43:33 +0000 (-0400)
Subject: Reset scev before invoking array_checker.
X-Git-Tag: basepoints/gcc-13~3540
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d46aeb5906b8ed7ee255cfbacc5cf9d2f56b850c;p=thirdparty%2Fgcc.git

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 38ea50303e0d..dc3e250537ad 100644
--- 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 ();
     }