Re: wrong assertion in caller-save.c

[Eric Botcazou]

> FWIW, it was fixed in 4.8 and later by making CODE_FOR_nothing be 0
> and starting the real instructions at 1.

Indeed, thanks for the heads-up:

2012-07-09  Steven Bosscher  <ste...@gcc.gnu.org>

        * gensupport.c (init_rtx_reader_args_cb): Start counting code
        generating patterns from 1 to free up 0 for CODE_FOR_nothing.
        * gencodes.c (main): Give CODE_FOR_nothing the value 0.  Add
        the LAST_INSN_CODE marker at the end.
        * genoutput.c (nothing): New static struct data.
        (idata): Initialize to &nothing.
        (idata_end): Initialize to &nothing.next.
        (init_insn_for_nothing): New function to create dummy 'nothing' insn.
        (main): Use it.
        * genpeep.c (insn_code_number): Remove global variable.
        (gen_peephole): Take it as an argument instead.
        (main): Take insn_code_number from read_md_rtx.
        * optabs.h: Revert r161809:
        (optab_handlers): Change type of insn_code back to insn_code.
        (optab_handler, widening_optab_handler, set_optab_handler,
        set_widening_optab_handler, convert_optab_handler,
        set_convert_optab_handler, direct_optab_handler,
        set_direct_optab_handler): Remove int casts.
        Revert to treating the insn_code field as "insn_code".

-- 
Eric Botcazou