[LLVMdev] SPMD Autovectorizer (original) (raw)

Pekka Jääskeläinen pekka.jaaskelainen at tut.fi
Thu Jul 9 05:28:43 PDT 2015

On 07/09/2015 12:47 PM, Renato Golin wrote:

Is this an IR pass? I think that'd be interesting...

Right, an IR pass mostly working at the CFG level. In addition to creating the parallel loops, it modifies the IR mainly to inject "context arrays" for temporarily storing variables of which live range crosses parallel regions (loops).

Maybe we should discuss a builtin with the larger community. Probably best if in a different thread, as this one's stale. :)

Yes. Simply an intrisics "llvm.spmd_barrier" or similar with "all threads or none reach me" semantics might do for starters.

-- --Pekka

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