[Nouveau] [Bug 90887] PhiMovesPass in register allocator broken

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sun Jun 7 13:33:35 PDT 2015


--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Gah! The inbound edge ordering having to be the same as in phi nodes has bit me
before as well. I wonder if it wouldn't be simpler to just fix that, i.e. make
phi nodes attach a bb reference to each argument.

In any case, I'll be able to take a closer look in a week or so. Great
detective work btw.

FTR, nva5 should be able to allow manual reclocking on kernel 3.19+ (if you add
nouveau.pstate=1), which should help decrease some of the perf difference wrt

Also, bug 90347 is completely different... that findFirstUse stuff is pretty
dodgy in the first place, and it happens post-RA. (And only on kepler+)

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