[PATCH] D115016: [CostModel][X86] Add i64 mul cost for avx as 1cy

[Phoebe Wang via Phabricator via llvm-commits]

pengfei added a comment.

> which is not true for most recent cpus.

It seems Zen1's TP is still 2 in some cases. See Agner Fog's table and https://uops.info/table.html?search=mul%2064&cb_lat=on&cb_tp=on&cb_uops=on&cb_ports=on&cb_SKL=on&cb_ZENp=on&cb_ZEN2=on&cb_measurements=on&cb_doc=on&cb_base=on

Another problem, do we need to add check for 64Bit?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D115016/new/

https://reviews.llvm.org/D115016