Comment # 7 on bug 98028 from Nicolai Hähnle

Thanks for the additional info. Running llc on those shaders under Valgrind
doesn't show anything either, but this may be a limitation of Valgrind in
connection with LLVM's internal allocator.

That this is exposed by the game's operator overrides is curious. If the
bisection result is solid, we can't put the blame on those overrides though.