[all-commits] [llvm/llvm-project] 62ea6c: [DAGCombine] Deduplicate addcarry node using commu...

[deadalnix via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 62ea6c5be785ff149fa593b431b4d5053e2b81a8
      https://github.com/llvm/llvm-project/commit/62ea6c5be785ff149fa593b431b4d5053e2b81a8
  Author: Amaury Séchet <deadalnix at gmail.com>
  Date:   2022-10-08 (Sat, 08 Oct 2022)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/X86/addcarry.ll

  Log Message:
  -----------
  [DAGCombine] Deduplicate addcarry node using commutativity.

The first two parameters of addcarry are commutative. We may face a situation where both variant are present in the DAG, in which case we benefit from using just one.

Depends on D57302 and D33587

Reviewed By: RKSimon, chfast

Differential Revision: https://reviews.llvm.org/D57317