[all-commits] [llvm/llvm-project] 17f4f2: Revert "Reapply [IR] Mark and constant expressions...

[Nathan Chancellor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 17f4f262fc5c4361cf43e91f2137ff7b2dcadc62
      https://github.com/llvm/llvm-project/commit/17f4f262fc5c4361cf43e91f2137ff7b2dcadc62
  Author: Nathan Chancellor <nathan at kernel.org>
  Date:   2023-07-21 (Fri, 21 Jul 2023)

  Changed paths:
    M clang/test/CodeGen/catch-nullptr-and-nonzero-offset.c
    M llvm/lib/IR/ConstantFold.cpp
    M llvm/lib/IR/Constants.cpp
    M llvm/test/CodeGen/Hexagon/atomic-opaque-basic.ll
    M llvm/test/Transforms/InstCombine/and-xor-or.ll
    M llvm/test/Transforms/InstCombine/bswap-fold.ll
    M llvm/test/Transforms/InstSimplify/ConstProp/constant-expr.ll
    M llvm/test/Transforms/InstSimplify/compare.ll

  Log Message:
  -----------
  Revert "Reapply [IR] Mark and constant expressions as undesirable"

This reverts commit 086ee99564afbb11449c08ea2e094f7f49fadde5.

This patch causes an infinite loop when building arch/mips/mm/c-r4k.c in
the Linux kernel. See the comment in Phabricator for a reduced
reproducer: https://reviews.llvm.org/rG086ee99564afbb11449c08ea2e094f7f49fadde5