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Re: [PATCH 1/2][RS6000] .gnu.attribute Tag_GNU_Power_ABI_FP
On Wed, Sep 28, 2016 at 01:20:22AM +0000, Joseph Myers wrote:
> On Wed, 28 Sep 2016, Alan Modra wrote:
>
> > I've also added a new option, default on, that disables output of
> > .gnu_attribute tags. That's needed because this patch alone
> > introduces libstdc++ testsuite regressions, fixed by the next patch.
>
> This option is missing documentation in invoke.texi.
Oops, I'll add that.
> > +mgnu-attr
> > +Target Report Var(rs6000_gnu_attr) Init(-1) Save
> > +Emit .gnu_attribute tags.
>
> Why Init(-1)? That's normally for cases where there is code that checks
> if it's still -1 (i.e. no option passed explicitly) and does something
> different in that case, but I don't see any such code in this patch.
Yes, it can be Init(1). I copied from other options in sysv4.opt.
Incidentally, in playing with #pragma GCC target "-mno-gnu-attr" I
find that it affects all functions in a file, rather than just
functions defined later in the file. I'll look into that too.
--
Alan Modra
Australia Development Lab, IBM