This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Proposed doc update for Explicit Reg Vars 3/3
- From: Segher Boessenkool <segher at kernel dot crashing dot org>
- To: Jeff Law <law at redhat dot com>
- Cc: David Wohlferd <dw at LimeGreenSocks dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>, Sandra Loosemore <sandra at codesourcery dot com>
- Date: Tue, 20 Oct 2015 10:13:14 -0500
- Subject: Re: Proposed doc update for Explicit Reg Vars 3/3
- Authentication-results: sourceware.org; auth=none
- References: <561C3DAE dot 8050505 at LimeGreenSocks dot com> <5625CF7E dot 5010003 at redhat dot com>
On Mon, Oct 19, 2015 at 11:22:06PM -0600, Jeff Law wrote:
> WRT your hope to limit this to only uses in extended asms. That'd be
> nice, but that's never been an explicit limitation. I would strongly
> hesitate to add that limitation at this point in time.
r88265 (from 2004) made explicit that local register asm only has a
guaranteed effect on asm operands. Since no other effect is guaranteed
we may as well not document those at all. Bug reports do still come in
about this.
Segher