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

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