[Bug lto/66229] LTO fails with -fauto-profile on mcf

[andi-gcc at firstfloor dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66229

--- Comment #2 from Andi Kleen <andi-gcc at firstfloor dot org> ---
Some analysis of the problem:

At the time cc1 is streaming out profile_data it is not set to anything in
autofdo. So the LTO files contain all 0 profile data, which later causes the
ICE here.

Seems to be some kind of ordering problem.

Strangely the autofdo pass gets executed in the frontend run, but for unknown
reasons the profile data doesn't survive until the LTO data is written.