RFC: Add ADDR_EXPR lowering (PR tree-optimization/66718)

[Marek Polacek]

On Sun, Jul 05, 2015 at 11:10:14AM +0800, Bin.Cheng wrote:
> > Just FYI, while bootstrapping/regtesting your patch together with the one
> > I've posted and another one to vectorize pr59984.c better, I've noticed there
> > is another regression with your patch (reverting my patches doesn't help,
> > disabling your gate does help):
> >
> > +FAIL: libgomp.c/simd-3.c execution test
> > +FAIL: libgomp.c++/simd-3.C execution test
> >
> > on both x86_64-linux and i686-linux (at least on AVX capable box).
> > Most likely hitting another latent vectorizer issue, haven't analyzed it
> > yet.
> Bootstrap and test the patch on aarch64.  Also saw these two failures,
> plus below one

Thanks for testing.

> FAIL: libgomp.fortran/target6.f90   -Os  execution test
> 
> Maybe the same cause with above two.  I will test later with Jakub's patch.

I suppose these are fixed now.
 
> Another problem is the added test failed on aarch64.  I attacked the dump here.

That's because on aarch64 we aren't able to vectorize as much as on x86_64.
I'll post a new version of the patch in a bit with the test restricted to
x86_64/i?86.

	Marek