string: Fix UB on gneric stpcpy

Building with ubsan it trigger:

UBSAN: Undefined behaviour in ../string/stpcpy.c:91:12 shift exponent 56 is too large for 32-bit type 'int'

Use an unsigned constant literal for MERGE, since op_t is defined
as unsigned.

diff --git a/string/stpcpy.c b/string/stpcpy.c
index 214802266c7d1fae038ea6221beab4a73ecf4405..0fe1b99192de66ae932b217297077ce89bf580c9 100644 (file)
--- a/string/stpcpy.c
+++ b/string/stpcpy.c
@@ -88,7 +88,7 @@ stpcpy_unaligned_loop (op_t *restrict dst, const op_t *restrict src,
        }
 
       /* Align the final partial of P2.  */
-      w2 = MERGE (w2b, sh_1, 0, sh_2);
+      w2 = MERGE (w2b, sh_1, 0UL, sh_2);
     }
 
 out: