This patch uses bitfields in reloc_howto_struct, reducing its size from 80 to 40 bytes on 64-bit hosts and from 52 to 32 bytes on 32-bit hosts (with a 32-bit bfd_vma). I've also added a new "negate" field rather than making the encoded "size" field do double duty as both a size and a flag. There was just one use of an encoded size of 8, which according to bfd_get_reloc_size meant 16 bytes, in vms-alpha.c ALPHA_R_LINKAGE. See git commit c3d8e071 adding ALPHA_R_LINKAGE and git commit 8612a388 decoding size 8 in bfd_get_reloc_size. Since no other part of BFD handles 16 byte relocs, I've removed that encoding and special cased the ALPHA_R_LINKAGE size in vms-alpha.c. * reloc.c (reloc_howto_type): Typedef. (bfd_symbol): Delete forward declaration. (struct reloc_howto_struct): Add "negate" field. Make "size", "bitsize", "rightshift", "bitpos", "complain_on_overflow", "pc_relative", "partial_inplace", and "pcrel_offset" bitfields. Rearrange for better packing. Revise comments. (HOWTO): Map to rearranged reloc_howto_struct. (bfd_get_reloc_size): Delete now unused cases. (read_reloc, write_reloc): Likewise. (apply_reloc, _bfd_relocate_contents): Test howto->negate rather than howto->size < 0 for negated relocation values. * coff-rs6000.c (xcoff_complain_overflow_bitfield_func): Avoid signed/unsigned warning. (xcoff_ppc_relocate_section): Delete "condition is always false" code. * coff64-rs6000.c (xcoff64_ppc_relocate_section): Likewise. * cpu-ns32k.c (do_ns32k_reloc): Adjust to suit reloc_howto_struct changes. * vms-alpha.c (_bfd_vms_write_etir, alpha_vms_slurp_relocs): Use size 16 for ALPHA_R_LINKAGE. (alpha_howto_table <ALPHA_R_LINKAGE>): Set encoded size and bitsize to zero. * bfd-in.h (reloc_howto_type): Delete. * bfd-in2.h: Regenerate.