On 10/29/2009 03:35 AM, Amir Gonnen wrote: > rtx test = simplify_relational_operation(EQ, VOIDmode, QImode, reg, > GEN_INT(129)); CONST_INT is always signed. If you really wrote this as you quote here, that would be the breakage. Try gen_int_mode (129, QImode) instead. r~