[Bug tree-optimization/84238] [8 Regression] ICE tree check: expected integer_cst, have plus_expr in to_wide, at tree.h:5527

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84238

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Untested fix:

--- a/gcc/tree-ssa-strlen.c
+++ b/gcc/tree-ssa-strlen.c
@@ -1899,7 +1899,10 @@ maybe_diag_stxncpy_trunc (gimple_stmt_iterator gsi, tree
src, tree cnt)
     {
       tree range[2];
       get_range_strlen (src, range);
-      if (range[0])
+      if (range[0] != NULL_TREE
+     && TREE_CODE (range[0]) == INTEGER_CST
+     && range[1] != NULL_TREE
+     && TREE_CODE (range[1]) == INTEGER_CST)
    {
      lenrange[0] = wi::to_wide (range[0], prec);
      lenrange[1] = wi::to_wide (range[1], prec);