[gcc r13-3902] [range-ops] Avoid unnecessary intersection in update_known_bitmask.

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

https://gcc.gnu.org/g:c0662c74969820fb576c8a2f35e946581c2c6f9d

commit r13-3902-gc0662c74969820fb576c8a2f35e946581c2c6f9d
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Fri Nov 11 10:11:03 2022 +0100

    [range-ops] Avoid unnecessary intersection in update_known_bitmask.
    
    All the work for keeping the maybe nonzero masks up to date is being
    done by the bit-CCP code now.  Any bitmask inherent in the range that
    range-ops may have calculated has no extra information, so the
    intersection is unnecessary.
    
    gcc/ChangeLog:
    
            * range-op.cc (update_known_bitmask): Avoid unnecessary intersection.

Diff:
---
 gcc/range-op.cc | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index 9eec46441a3..0b01cf48fdf 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -89,10 +89,7 @@ update_known_bitmask (irange &r, tree_code code,
   bit_value_binop (code, sign, prec, &value, &mask,
 		   lh_sign, lh_prec, lh_value, lh_mask,
 		   rh_sign, rh_prec, rh_value, rh_mask);
-
-  int_range<2> tmp (type);
-  tmp.set_nonzero_bits (value | mask);
-  r.intersect (tmp);
+  r.set_nonzero_bits (value | mask);
 }
 
 // Return the upper limit for a type.