[all-commits] [llvm/llvm-project] 05d4c4: [InstCombine] Canonicalize SPF_ABS to abs intrinc

[Nikita Popov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 05d4c4ebc2fb006b8a2bd05b24c6aba10dd2eef8
      https://github.com/llvm/llvm-project/commit/05d4c4ebc2fb006b8a2bd05b24c6aba10dd2eef8
  Author: Nikita Popov <nikita.ppv at gmail.com>
  Date:   2020-09-17 (Thu, 17 Sep 2020)

  Changed paths:
    M clang/test/CodeGen/builtins-wasm.c
    M llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
    M llvm/test/Transforms/InstCombine/abs-1.ll
    M llvm/test/Transforms/InstCombine/abs_abs.ll
    M llvm/test/Transforms/InstCombine/call-callconv.ll
    M llvm/test/Transforms/InstCombine/cttz-abs.ll
    M llvm/test/Transforms/InstCombine/icmp.ll
    M llvm/test/Transforms/InstCombine/max-of-nots.ll
    M llvm/test/Transforms/InstCombine/select_meta.ll
    M llvm/test/Transforms/InstCombine/sub-of-negatible.ll
    M llvm/test/Transforms/PhaseOrdering/X86/vector-reductions.ll
    M llvm/test/Transforms/PhaseOrdering/min-max-abs-cse.ll

  Log Message:
  -----------
  [InstCombine] Canonicalize SPF_ABS to abs intrinc

Enable canonicalization of SPF_ABS and SPF_NABS to the abs intrinsic.

To be conservative, the one-use check on the comparison is retained,
this may be relaxed if all goes well.

It's pretty likely that this will uncover places that missing
handling for the abs() intrinsic. Please report any seen performance
regressions.

Differential Revision: https://reviews.llvm.org/D87188