r177819 - Make clang to mark static stack allocations with lifetime markers to enable a more aggressive stack coloring.

[Rafael Espíndola]

On 25 March 2013 11:45, Nadav Rotem <nrotem at apple.com> wrote:
> It sounds like one of the IR-level optimization breaks when lifetime markers
> are added. Do you know which optimization it may be ? I see the name "SROA"
> in the _correct_ version of the IR. Is there another optimization that may
> mess with vector loads ?

There was a thread about simplifycfg and llvm.lifetime intrinsics some
time ago, but unfortunately I don't remember if we got to a conclusion
of what exactly the semantics are. You should be able to find the
thread ind the archives. The subject is "Can simplifycfg kill
llvm.lifetime intrinsics"

Cheers,
Rafael