[gcc r14-258] Convert compare_nonzero_chars to wide_ints.

[Aldy Hernandez <aldyh@gcc.gnu.org>]

https://gcc.gnu.org/g:fb5607ae6ad468fe1183b7a3b392d445010ada41

commit r14-258-gfb5607ae6ad468fe1183b7a3b392d445010ada41
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Thu Mar 2 16:56:12 2023 +0100

    Convert compare_nonzero_chars to wide_ints.
    
    gcc/ChangeLog:
    
            * tree-ssa-strlen.cc (compare_nonzero_chars): Convert to wide_ints.

Diff:
---
 gcc/tree-ssa-strlen.cc | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/gcc/tree-ssa-strlen.cc b/gcc/tree-ssa-strlen.cc
index 0bbcb04834f..de785281b27 100644
--- a/gcc/tree-ssa-strlen.cc
+++ b/gcc/tree-ssa-strlen.cc
@@ -359,10 +359,10 @@ compare_nonzero_chars (strinfo *si, gimple *stmt,
      of the length range are equal return the result of the comparison
      same as in the constant case.  Otherwise return a conservative
      result.  */
-  tree lower = wide_int_to_tree (vr.type (), vr.lower_bound ());
-  tree upper = wide_int_to_tree (vr.type (), vr.upper_bound ());
-  int cmpmin = compare_tree_int (lower, off);
-  if (cmpmin > 0 || tree_int_cst_equal (lower, upper))
+  signop sign = TYPE_SIGN (vr.type ());
+  unsigned prec = TYPE_PRECISION (vr.type ());
+  int cmpmin = wi::cmp (vr.lower_bound (), wi::uhwi (off, prec), sign);
+  if (cmpmin > 0 || vr.singleton_p ())
     return cmpmin;
 
   return -1;