https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118911
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- We are expecting: g1: mov x2, x0 mov x3, 0 and x4, x2, 9223372036854775807 mov w0, w1 and x2, x2, 1 b f1 But currently getting: g1: sbfx x2, x0, 0, 63 mov x3, 0 and x4, x2, 9223372036854775807 mov w0, w1 and x2, x2, 1 b f1 That is the sbfx has NOT been merge into x4 and x2.