This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: locking problem with mips atomicity

Richard Sandiford wrote:
> 
> Michael Eager <eager@mvista.com> writes:
> > I've revised the patch.  It now only has constraints which are referenced.
> > I added a "memory" constraint.
> 
> Sorry if I've missed the explanation, but why is using a memory clobber
> an improvement over an unused memory operand?

The location which is clobbered is unknown.  From what I understand, an
unused memory operand is ignored.  

--
Michael Eager     eager@mvista.com	408-328-8426	
MontaVista Software, Inc. 1237 E. Arques Ave., Sunnyvale, CA  94085
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]