Re: [PATCH] x86: work around clang IAS bug referencing __force_order

[Segher Boessenkool]

Hi Arvind,

On Fri, Aug 21, 2020 at 11:55:52PM -0400, Arvind Sankar wrote:
> Cc Segher.
> 
> Segher, we were looking at gcc PR82602, where IRA could reorder volatile
> asm's (reported on ARM). The fix was backported to gcc-6.

I know ;-)

> Do you know if
> there is any reason the problem couldn't occur on x86 on older gcc
> without the fix?

No, I see no particular reason, at least GCC 5 seems vulnerable.  (The
GCC 5 release branch was closed at the time this bug report was made,
already).  There is no reason I see why it would work on x86 but fail
elsewhere, either.


Segher