http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53422
--- Comment #3 from Dan Nicolaescu <dann at ics dot uci.edu> 2012-05-21 16:53:25 UTC --- (In reply to comment #2) > The reason for the extra fields in BARRIER and CODE_LABEL is to make it > possible for a BARRIER or CODE_LABEL to be turned into > INSN/JUMP_INSN/CALL_INSN. So you'd need to verify it isn't needed anywhere. JUMP_INSN and CALL_INSN have 9 fields, CODE_LABEL/BARRIER have 8. The patch went through regressions when it was written, years ago, but not since then. I won't have time to do anything about it anytime soon. > Note, your reordering of CODE_LABEL fields doesn't change anything on the > allocated size, even tail 0 format fields are allocated. See in the original message: "then it's easy to define CODE_LABEL conditionally so that it does not use that last entry on the rest of the machines."
