https://bugs.freedesktop.org/show_bug.cgi?id=98761
--- Comment #7 from Marek Olšák maraeo@gmail.com --- Found the bad shader.
The good one has before v_interp: s_mov_b32 m0, s11
The bad one has before v_interp: s_mov_b32 m0, s19
I don't see any store instructions though.