-current build failure

[David Chisnall]

On 23 Jul 2012, at 20:18, Konstantin Belousov wrote:

> Longer description is that pc_curthread is offset 0 if %gs-based.
> The dereferenced pointer point to the struct thread, which contains
> td_proc pointer at offset 8. Instead, clang seems to dereference
> td_proc from offset 8 based on %gs, or something similar.

This appears to be a bug in the LLVM X86 back end.  It is performing an invalid fold of the two loads.  I have filed this bug:

http://llvm.org/bugs/show_bug.cgi?id=13438

David