[PATCH] D79615: [X86] Teach getUndefRegClearance that we use undef for inputs to PUNPCK in some cases.

[Craig Topper via Phabricator via llvm-commits]

craig.topper marked an inline comment as done.
craig.topper added inline comments.


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Comment at: llvm/lib/Target/X86/X86InstrInfo.cpp:4895
   case X86::PACKSSDWrr:
   case X86::PACKUSDWrr:
   case X86::VPACKSSWBrr:
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RKSimon wrote:
> Does the non-VEX PACKSS/PACKUS need pulling out as well since Op1 is tied? I don't know if we have examples of this though.
Yeah good catch. I'll more those.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D79615/new/

https://reviews.llvm.org/D79615