http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49676
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-07-08 15:31:38 UTC --- Created attachment 24716 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24716 gcc47-pr49676.patch Attached patch saves those 2 bytes. To answer the general question, for < DWARF2_ADDR_SIZE size types entry_value is just untyped, and assuming whether it is signed or unsigned is error-prone, especially if it is in another CU where we can't check it. In some ABIs the registers in which stuff is passed are sign-extended or zero-extended, on other ABIs they may contain garbage in the upper bits, in other ABIs it is a mess (e.g. x86_64 unfortunately).
