[llvm-dev] Loop Vectorize: Testing cost model driven transformations

Michael Kuperstein via llvm-dev llvm-dev at lists.llvm.org
Wed Nov 30 10:04:09 PST 2016


Thanks Matt!

So, just to make sure I understand, what is getting a specific TTI in llc
triggered off? -mcpu?

On Tue, Nov 29, 2016 at 2:49 PM, Matthew Simpson via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

>
> On Tue, Nov 29, 2016 at 5:11 PM, Adam Nemet via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Do we need a new (loop-vectorizer-specific) command line option for
>> this?  Don’t we get the default TTI if the target is unspecified in the
>> test?
>
>
> I think you're right! It looks like I am getting the default TTI when the
> target is left unspecified. I was assuming it would default to whatever the
> host is, but this doesn't seem to be the case. I guess this is a non-issue
> after all, as long as we don't specify a triple in the target-independent
> tests. And it looks like Michael cleaned that all up in r283512.
>
> Thanks!
>
> -- Matt
>
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