[Bug 83436] Sudden framerate drops in multiple games

https://bugs.freedesktop.org/show_bug.cgi?id=83436

--- Comment #14 from Emil Velikov emil.l.velikov@gmail.com --- (In reply to comment #12)

That happens with default ./autogen blah blah

As i said earlier if i pass -mtune=native -march=native flags perf is normal, very weird and funny thing in the same time :D

Unless you're provided --enable-debug mesa does mess around with the compiler optimisation/debug options (-O* and -g*). And it never touches -mtune or -march. Might be that the compiler is going for some different heuristics before/after the commit causing substantially different code to be generated ?