[PATCH] D142359: [TTI][AArch64] Cost model vector INS instructions

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

The internal embedded benchmarks I tried had some pretty wild swings in both direction. I think it is worth working towards this, if we can try and minimize the regressions in the process. Running more benchmarks from SPEC and perhaps the llvm-test-suite would be good (maybe try and see what is going on in salsa for example? We might be getting the costs of scalar rotates/funnel shifts incorrect?)

There might be quite a few other cases. I can try and provide some examples if I can extract them.


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