https://bugs.freedesktop.org/show_bug.cgi?id=91342
--- Comment #9 from Daniel Scharrer daniel@constexpr.org --- I can reproduce the issue on my Radeon HD 7950 (TAHITI) - here is an apitrace:
http://constexpr.org/tmp/POSTAL2-radeonsi.trace.xz (75 MiB)