[Bug rtl-optimization/65067] regression on accessing volatile bit field

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65067

--- Comment #10 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Tony Liu from comment #9)
> (In reply to Bernd Edlinger from comment #8)
> > Created attachment 34955 [details]
> > Proposed Fix
> > 
> > Well, I noticed that the first version of this patch caused
> > a small but measurable decrease of code quality on x86_64,
> > so I moved the patch to the if (strict_volatile_bitfield_p block,
> > and used some code transformations to simplify the resulting code
> > a bit.
> > 
> > I will post this new version for review, after a full boot-strap
> > and successful regression-test on my ARM target.
> 
> I've tested for target Cortex-M3, no regression.

Oh, thanks.  This was really speedy!

Then I am clear to post the patch in a moment.