llvm dev - Jan 2016 - variable instruction latency using itineraries

It it possible to specify an instruction latency in the itinerary through a
command line option? We have several options for a hardware divider which
have different latencies and it would be nice if I could specify it through
a compiler option rather than changing the value in the code and
recompiling llvm every time?

Any help is appreciated.

-- 
Rail Shafigulin
Software Engineer
Esencia Technologies
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Hi Rail,

I believe that your target can override getInstrLatency/getOperandLatency in
your TargetInstrInfo subclass and add the behavior you desire.

 -Hal

----- Original Message -----
> From: "Rail Shafigulin via llvm-dev" <llvm-dev at
lists.llvm.org>
> To: "llvm-dev" <llvm-dev at lists.llvm.org>
> Sent: Monday, January 4, 2016 3:27:06 PM
> Subject: [llvm-dev] variable instruction latency using itineraries
> 
> It it possible to specify an instruction latency in the itinerary
> through a command line option? We have several options for a
> hardware divider which have different latencies and it would be nice
> if I could specify it through a compiler option rather than changing
> the value in the code and recompiling llvm every time?
>
> Any help is appreciated.
>
> --
> Rail Shafigulin
> Software Engineer
> Esencia Technologies
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> 
-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory

On Tue, Jan 5, 2016 at 12:23 PM, Hal Finkel <hfinkel at anl.gov> wrote:
> Hi Rail,
>
> I believe that your target can override getInstrLatency/getOperandLatency
> in your TargetInstrInfo subclass and add the behavior you desire.
>
>  -Hal

Thanks!!!

-- 
Rail Shafigulin
Software Engineer
Esencia Technologies
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