[all-commits] [llvm/llvm-project] 8a7778: Revert "[X86] Remove redundant `cmp` before `adc` ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8a77787a526e31f48dd4d6f4cd9d68b982d8b772
      https://github.com/llvm/llvm-project/commit/8a77787a526e31f48dd4d6f4cd9d68b982d8b772
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-07-16 (Thu, 16 Jul 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86InstrInfo.cpp
    M llvm/test/CodeGen/X86/bitcnt-load-with-cmov.ll
    R llvm/test/CodeGen/X86/remove-redundant-cmp-lzcnt-i64.ll
    R llvm/test/CodeGen/X86/remove-redundant-cmp-lzcnt.ll
    R llvm/test/CodeGen/X86/remove-redundant-cmp-tzcnt-i64.ll
    R llvm/test/CodeGen/X86/remove-redundant-cmp-tzcnt.ll

  Log Message:
  -----------
  Revert "[X86] Remove redundant `cmp` before `adc` after `lzcnt` or `tzcnt`" (#210006)

Reverts #208392 - while we investigate a miscompile due to CF/ZF mismatch



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