We are emitting .eh_frame data with DW_CFA_def_cfa where we could emit DW_CFA_def_cfa_register. This makes the .eh_frame one byte larger per occurence.
This appears to only be done for mips targets as a workaround for bugs in the SGI assembler/linker. For targets using GNU Binutils we don't need the workround. -- Summary: MIPS: Non-optimal DWARF frame data Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: enhancement Priority: P3 Component: target AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: daney at gcc dot gnu dot org GCC target triplet: mips*-*-linux* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34409