[Bug c++/63356] Compilation failure where clang does not have problems

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63356

--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 33545
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33545&action=edit
preprocessed testcase

Here's the unreduced testcase. I cannot reduce it, because
clang doesn't handle all the __builtin_ia32_bsrsi, etc. intrinsics.