[PATCH] D15724: AMDGPU/SI: fix scratch resource register allocation on Tonga & Iceland

[Nicolai Hähnle via llvm-commits]

nhaehnle added a comment.

Yes, I actually ran into this with a real shader, but it's a very big one :) To hit this, all SGPRs _and_ VGPR spilling have to be used. Perhaps a long sequence of loads followed by some kind of barrier intrinsics could work?

And you're right, the code below also looks like it needs to be adapted, but somehow the bug got fixed even without it. I'll look into it.


http://reviews.llvm.org/D15724