[all-commits] [llvm/llvm-project] 077385: [DAG] Fold trunc(avg(x, y)) for avgceil/floor u/s n...

[黃國庭 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 07738545758be942cb674254ed4bc6d12db48563
      https://github.com/llvm/llvm-project/commit/07738545758be942cb674254ed4bc6d12db48563
  Author: 黃國庭 <we3223 at gmail.com>
  Date:   2025-08-18 (Mon, 18 Aug 2025)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    A llvm/test/CodeGen/AArch64/trunc-avg-fold.ll

  Log Message:
  -----------
  [DAG] Fold trunc(avg(x,y)) for avgceil/floor u/s nodes if they have sufficient leading zero/sign bits (#152273)

avgceil version :  https://alive2.llvm.org/ce/z/2CKrRh  

Fixes #147773 

---------

Co-authored-by: Simon Pilgrim <llvm-dev at redking.me.uk>



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