[all-commits] [llvm/llvm-project] 884525: [DAG] Improve carry reconstruction in combineCarry...

[deadalnix via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 88452508f35f0140be1dbb03516929ed48342236
      https://github.com/llvm/llvm-project/commit/88452508f35f0140be1dbb03516929ed48342236
  Author: Amaury Séchet <deadalnix at gmail.com>
  Date:   2023-07-22 (Sat, 22 Jul 2023)

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

  Log Message:
  -----------
  [DAG] Improve carry reconstruction in combineCarryDiamond.

The gain is usually suffiscient to go the extra mile and reconstruct a carry in some cases.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D154533