[PATCH] D60674: [X86] Restore the pavg intrinsics.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, spatel.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

The pattern we replaced these with may be too hard to match as demonstrated by
PR41496 and PR41316.

This patch proposes to restore the intrinsics and then we can start focusing
on the optimizing the intrinsics.

I've mostly reverted the original patch that removed them. Though I modified
the avx512 intrinsics to not have masking built in.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D60674

Files:
  llvm/include/llvm/IR/IntrinsicsX86.td
  llvm/lib/IR/AutoUpgrade.cpp
  llvm/lib/Target/X86/X86IntrinsicsInfo.h
  llvm/test/CodeGen/X86/avx2-intrinsics-fast-isel.ll
  llvm/test/CodeGen/X86/avx2-intrinsics-x86-upgrade.ll
  llvm/test/CodeGen/X86/avx2-intrinsics-x86.ll
  llvm/test/CodeGen/X86/avx512bw-intrinsics.ll
  llvm/test/CodeGen/X86/avx512bwvl-intrinsics.ll
  llvm/test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
  llvm/test/CodeGen/X86/sse2-intrinsics-x86-upgrade.ll
  llvm/test/CodeGen/X86/sse2-intrinsics-x86.ll

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