purge_addressof bootstrap failure (was fix opt/8634)

[Geoff Keating]

David Edelsohn <dje@watson.ibm.com> writes:

> The follow-up patch
> 
>         * function.c (postponed_insns): New.
>         (purge_addressof_1): Postpone processing of insns if addressofs
>         are not put into stack.
>         (purge_addressof): Process postponed insns.
> 
> introduced a bootstrap failure on AIX:
> 
> /gcc/dje/build/powerpc-ibm-aix4.3.3.0-20030408/powerpc-ibm-aix4.3.3.0/pthread/libstdc++-v3/include/bits/istream.tcc: In
>    function `std::basic_istream<_CharT, _Traits>& 
>    std::operator>>(std::basic_istream<_CharT, _Traits>&, 
>    std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = 
>    std::char_traits<char>, _Alloc = std::allocator<char>]':
> /gcc/dje/src/libstdc++-v3/src/misc-inst.cc:47:   instantiated from here
> /gcc/dje/build/powerpc-ibm-aix4.3.3.0-20030408/powerpc-ibm-aix4.3.3.0/pthread/libstdc++-v3/include/bits/istream.tcc:1137: internal compiler error: RTL
>    flag check: CONST_OR_PURE_CALL_P used with unexpected rtx code `insn_list' 
>    in sched_analyze, at sched-deps.c:1274

There are two testcase failures on Darwin which may be related.

-- 
- Geoffrey Keating <geoffk@geoffk.org>