[PATCH], PR target/71294, Fix compiler segfault for reload & power8

[Segher Boessenkool]

Hi Mike,

On Wed, Mar 15, 2017 at 06:31:12PM -0400, Michael Meissner wrote:
> This patch is a simpler approach to fixing PR 71294, then I proposed last year.

Much simpler!  Thank you.

> I have built compilers on a little endian Power8 system (64-bit only), big
> endian Power8 system (64-bit only) and big endian Power7 system (32-bit and
> 64-bit).  At the moment, the two power8 systems have no regressions, and the
> power7 system is still building.  Assuming the power7 system completes without
> regressions, can I check this patch into the trunk?

Yes please.

> Assuming the patch applies and causes no regressions, can I check this patch
> into GCC 6 and 5 as well.  Since GCC 6/5 do run with reload as the default,
> they would likely see the issue.  GCC 7 has switched to LRA, which is more
> robust, and doesn't show the problem (unless you use the -mno-lra switch).

Okay after a week or so of soaking.


Segher