[all-commits] [llvm/llvm-project] fef0cf: [LangRef] Add integer min/max/abs intrinsics

[Nikita Popov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: fef0cf081076006887362d6bfcfc306522ce2bd3
      https://github.com/llvm/llvm-project/commit/fef0cf081076006887362d6bfcfc306522ce2bd3
  Author: Roman Lebedev <lebedev.ri at gmail.com>
  Date:   2020-07-23 (Thu, 23 Jul 2020)

  Changed paths:
    M llvm/docs/LangRef.rst

  Log Message:
  -----------
  [LangRef] Add integer min/max/abs intrinsics

Add LangRef specification for the llvm.abs, llvm.umin, llvm.umax,
llvm.smin, and llvm.smax integer intrinsics.

Link to RFC:
https://lists.llvm.org/pipermail/llvm-dev/2020-June/142257.html

Proposed alive2 implementation:
https://github.com/AliveToolkit/alive2/pull/353

Differential Revision: https://reviews.llvm.org/D81829


  Commit: deb4bb2b3abd216aceaa109a5304f025a234540f
      https://github.com/llvm/llvm-project/commit/deb4bb2b3abd216aceaa109a5304f025a234540f
  Author: Nikita Popov <nikita.ppv at gmail.com>
  Date:   2020-07-23 (Thu, 23 Jul 2020)

  Changed paths:
    M llvm/include/llvm/IR/Intrinsics.td
    M llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    A llvm/test/CodeGen/AMDGPU/GlobalISel/minmaxabs.ll
    A llvm/test/CodeGen/X86/abs.ll
    A llvm/test/CodeGen/X86/smax.ll
    A llvm/test/CodeGen/X86/smin.ll
    A llvm/test/CodeGen/X86/umax.ll
    A llvm/test/CodeGen/X86/umin.ll

  Log Message:
  -----------
  [IR] Add min/max/abs intrinsics

This adds the llvm.abs(), llvm.umin(), llvm.umax(), llvm.smin(),
and llvm.smax() intrinsics specified in D81829. For SelectionDAG,
the ISD opcodes and all the legalization and lowering already exist,
so this just wires them up to the intrinsic in the SDAG builder and
adds rudimentary tests. For GlobalISel only the min/max intrinsics
are wired up, as llvm.abs() will require the addition of a G_ABS op,
and corresponding legalization support.

Differential Revision: https://reviews.llvm.org/D84125


Compare: https://github.com/llvm/llvm-project/compare/2f56046d7c66...deb4bb2b3abd