[PATCH] D72683: [PowerPC] set instruction number as 1st priority for lsr cost model

[ChenZheng via Phabricator via llvm-commits]

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In D72683#1874943 <https://reviews.llvm.org/D72683#1874943>, @jsji wrote:

> Can we add an option to control the strategy here, so that people can fall back to old behavior? Thanks.


Good Idea! Will do it in next patch.


Repository:
  rG LLVM Github Monorepo

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