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 DavidReceived on Mon Jul 23 2012 - 17:53:36 UTC
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