[Bug target/81763] Issues with BMI on 32bit x86 apps on GCC 7.1+

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763

--- Comment #48 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Mike Lothian from comment #47)
> With the patch you've committed to gcc master, applied on top of GCC 7.3 I'm
> now seeing the following error building Clang:

I don't think this is related to the original bugreport involving BMI
instructions.  Could be Clang's source incompatibility with 32bit target.

In any case, please open a new PR.