[llvm-dev] testing a back-end pre-emit pass

[Krzysztof Parzyszek via llvm-dev]

You can print the function as MIR and then use that as an input to llc. 
llc can run individual passes on .mir input with -run-pass.

-Krzysztof


On 8/5/2016 6:08 AM, Chris.Dewhurst via llvm-dev wrote:
> Hi,
>
> I've been trying all sorts of things to be able to resolve this, but I
> can't find way to get this done.
>
> Does anyone know how I might introduce a transform at the ASM level?
>
> Chris.
> ------------------------------------------------------------------------
> *From:* Chris.Dewhurst
> *Sent:* 01 August 2016 16:46
> *To:* llvm-dev at lists.llvm.org
> *Subject:* testing a back-end pre-emit pass
>
> Hi,
>
> Does anyone have any direction for me on testing a back-end pre-emit
> pass independently of other passes? The pass I'm looking at is a
> MachineFunctionPass, so the code is already using target-specific
> instructions.
>
> What I'm really looking to do is to see that the pass is correctly
> converting certain target-specific instructions sequences into other
> sequences, but I'm unsure how I can get an input in the correct format
> to construct a good unit test. Can I generate an ".ll" file using target
> specific instructions and then pass it through to a back-end
> MachineFunctionPass to test specifically just that one pass?
>
> Chris Dewhurst,
> Lero, University of Limerick.
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, 
hosted by The Linux Foundation