(In reply to comment #9)
> The piglit test should work with this patch:
> http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20130624/179364.
> html
> 
> But we should still try to fix the bug in libclc.

I've just pushed this patch.  What is the status of this bug with your
vstore/vload fixes?