[Bug middle-end/64339] reject unsafe options in pragma GCC optimize

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64339

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |joseph at codesourcery dot com

--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> (In reply to Manuel López-Ibáñez from comment #0)
> > Some options are known to be unsafe to set via pragma GCC optimize. See:
> > https://sourceware.org/ml/libc-alpha/2014-12/msg00597.html and
> > https://sourceware.org/ml/libc-alpha/2014-12/msg00599.html
> > 
> > It would be better to add a flag to the *.opt files to mark safe options
> > explicitly, such that specifying any option that is not safe produces a
> > fatal error.
> 
> Taking Joseph's comments in the linked thread as confirmation.

...and cc-ing him.