Re: [RFA] expand from SSA form (1/2)

[David Edelsohn <dje dot gcc at gmail dot com>]

On Mon, Apr 27, 2009 at 8:23 PM, Michael Matz <matz@suse.de> wrote:
> Hi David,
>
> On Mon, 27 Apr 2009, David Edelsohn wrote:
>
>> gcc.c-torture/execute/20030916-1.c is a new testsuite failure.
>
> Excellent! (or not, depending on the p.o.v. :-) ). ?I'll try to analyze
> this. ?I feared already that this wouldn't help powerpc, but this most
> probably is some confusion in the RTL move instructions generated on the
> edges. ?No doubt I overlooked some target peculiarity in generating them
> :-(
>
> Meanwhile Andrew has analyzed this somewhat (PR39929). ?If that turns out
> to be correct we would need to amend the target to check for
> currently_expanding_to_rtl, not just for current_ir_type(). ?That wouldn't
> influence the AIX breakage though.

I tried Andreas Krebbel's patch, but that, unfortunately, did not fix
the AIX libobjc build.

I am able to bootstrap C, C++, and Fortran, and run the testsuite.
Objective C is not
required on AIX, but the build problem is exposing a miscompilation of GCC on
PowerPC after the expand SSA merge.

David