[all-commits] [llvm/llvm-project] 282686: [DAG] Do not combine any_ext when we combine and i...

[deadalnix via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2826869d7b3119f96b973f5cd15128162334f1fe
      https://github.com/llvm/llvm-project/commit/2826869d7b3119f96b973f5cd15128162334f1fe
  Author: Amaury Séchet <deadalnix at gmail.com>
  Date:   2023-01-19 (Thu, 19 Jan 2023)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/X86/clear_upper_vector_element_bits.ll
    M llvm/test/CodeGen/X86/illegal-bitfield-loadstore.ll
    M llvm/test/CodeGen/X86/known-signbits-vector.ll
    M llvm/test/CodeGen/X86/ushl_sat.ll
    M llvm/test/CodeGen/X86/ushl_sat_vec.ll

  Log Message:
  -----------
  [DAG] Do not combine any_ext when we combine and into zext.

This transofrm loses information that can be useful for other transforms.

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D141883