[all-commits] [llvm/llvm-project] c55d9a: [AArch64] Add custom lowering for ISD::ABS

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c55d9af8c0d33088bd103ce70fea23ce31f72968
      https://github.com/llvm/llvm-project/commit/c55d9af8c0d33088bd103ce70fea23ce31f72968
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2020-12-04 (Fri, 04 Dec 2020)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/neg-abs.ll

  Log Message:
  -----------
  [AArch64] Add custom lowering for ISD::ABS

Instead of trying to pattern match the code produced by ISD::ABS expansion, just custom legalize ISD::ABS to the desired sequence.

The one test change is because a DAG combine for (neg (abs)) is no longer firing because ISD::ABS is now Custom instead of Expand.

Differential Revision: https://reviews.llvm.org/D92154