Fix broken left shift of IV_MIN under 'use integer'

This fixes GH 18639

When I wrote this code, I conflated casting and complementing.

1 files changed, 0 insertions, 3 deletions

diff --git a/pp.c b/pp.c
index d365afea4c..baf0777a47 100644
--- a/pp.c
+++ b/pp.c
@@ -2007,9 +2007,6 @@ static IV S_iv_shift(IV iv, int shift, bool left)
      * 18446744073709551552
      * */
     if (left) {
-        if (iv == IV_MIN) { /* Casting this to a UV is undefined behavior */
-            return 0;
-        }
         return (IV) (((UV) iv) << shift);
     }