[all-commits] [llvm/llvm-project] 4e0008: Revert "[InstCombine] try to narrow shifted bswap-...

[Nathan Chancellor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4e0008dcbe9fce99b9727e8bbeb129efc7bf2d80
      https://github.com/llvm/llvm-project/commit/4e0008dcbe9fce99b9727e8bbeb129efc7bf2d80
  Author: Nathan Chancellor <nathan at kernel.org>
  Date:   2022-03-22 (Tue, 22 Mar 2022)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
    M llvm/test/Transforms/InstCombine/lshr.ll

  Log Message:
  -----------
  Revert "[InstCombine] try to narrow shifted bswap-of-zext"

This reverts commit 9e9bda2e8f5b88715bad767a4b7740df32b040d2.

This causes a backend error when building the Linux kernel for arm64.
See https://reviews.llvm.org/D122166 for a simplified reproducer.