You can use -mno-popcnt for this.
Godbolt: https://godbolt.org/z/raszoEedr
Reference: https://clang.llvm.org/docs/ClangCommandLineReference.html#c...
Godbolt: https://godbolt.org/z/raszoEedr
Reference: https://clang.llvm.org/docs/ClangCommandLineReference.html#c...
The option I linked is even listed under the x86-specific options...