[Bug other/83497] CPU2000 172.mgrid starts failing with r254730

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83497

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The initial bisection rev. is indeed odd.  I'm testing a fix for the inliner
issue btw, but I've not seen the mgrid fail on any of our x86/ia64 configs.

As far as I see the miscompare is -0.8 vs. 0.18 so it doesn't look like a
precision issue to me.  Does it only happen for power6 / bigendian?

Maybe you can narrow down the root-cause somewhat - mgrid is a very small
benchmark.  power6 always hints at scheduling.