[PATCH] D21251: [TTI] The cost model should not assume illegal vector casts get completely scalarized

[Demikhovsky, Elena via llvm-commits]

The cost numbers in the tests are good enough. I checked them for all X86 targets, especially for AVX-512 which has unsigned conversions and i64 type.
I also changed SSE/AVX/AVX-512 tables there, may be you’ll want to take a look.

-           Elena

From: Michael Kuperstein [mailto:mkuper at google.com]
Sent: Friday, June 24, 2016 01:05
To: Demikhovsky, Elena <elena.demikhovsky at intel.com>
Cc: reviews+D21251+public+7bb3c686dff8f34a at reviews.llvm.org; silviu.baranga at arm.com; hfinkel at anl.gov; james.molloy at arm.com; thomas.stellard at amd.com; llvm-dev at redking.me.uk; Matthew.Arsenault at amd.com; llvm-commits at lists.llvm.org; amara.emerson at arm.com
Subject: Re: [PATCH] D21251: [TTI] The cost model should not assume illegal vector casts get completely scalarized

Ah, it's a shame I missed D15604, would have saved me the trouble of figuring out getTypeLegalizationCost() is mis-named.

Anyway, I think this patch should more or less take care of the type legalization aspect of D15604.
Regarding the changes D15604 made in the cost table - was there a reason you abandoned them? Or are they independently good?

On Thu, Jun 23, 2016 at 2:55 PM, Demikhovsky, Elena <elena.demikhovsky at intel.com<mailto:elena.demikhovsky at intel.com>> wrote:

   >If you don't mind, I'll add the test as a separate patch - we don't only want
   >this specific test, we need tests for a bunch of sexts/zexts, like ARM has.
   >
[Demikhovsky, Elena] yes, you can add tests later. You can look at this revision as a test reference for X86
http://reviews.llvm.org/D15604
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