[PATCH] D112307: [X86] `X86TTIImpl::getInterleavedMemoryOpCost()`: scale interleaving cost by the fraction of live members
Roman Lebedev via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Oct 22 06:31:19 PDT 2021
lebedev.ri updated this revision to Diff 381527.
lebedev.ri marked an inline comment as done.
lebedev.ri added a comment.
In D112307#3080532 <https://reviews.llvm.org/D112307#3080532>, @RKSimon wrote:
> In D112307#3080510 <https://reviews.llvm.org/D112307#3080510>, @lebedev.ri wrote:
>
>> In D112307#3080480 <https://reviews.llvm.org/D112307#3080480>, @RKSimon wrote:
>>
>>> SGTM - cheers
>>
>> To check - was it clear from my explanation that this is a *rough* approximation,
>> that can deviate from reality in either direction, i.e. it may both be
>> higher cost than in reality, and for some cases it might be lower cost than in reality?
>
> Yes - which is why I asked you to include that as a comment to GetDiscountedCost. Cheers.
Awesome, thank you for the review!
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D112307/new/
https://reviews.llvm.org/D112307
Files:
llvm/lib/Target/X86/X86TargetTransformInfo.cpp
llvm/test/Analysis/CostModel/X86/interleaved-load-i32-stride-2-indices-0u.ll
llvm/test/Analysis/CostModel/X86/interleaved-load-i32-stride-3-indices-01u.ll
llvm/test/Analysis/CostModel/X86/interleaved-load-i32-stride-3-indices-0uu.ll
llvm/test/Analysis/CostModel/X86/interleaved-load-i32-stride-4-indices-012u.ll
llvm/test/Analysis/CostModel/X86/interleaved-load-i32-stride-4-indices-01uu.ll
llvm/test/Analysis/CostModel/X86/interleaved-load-i32-stride-4-indices-0uuu.ll
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