On 11/17/2011 03:47 PM, Alan Modra wrote:
> BTW, we're left with dead stores into oldval's stack slot. Is it
> legal for the first two parameters of __atomic_compare_exchange to
> alias? I'm guessing that the stores might disappear if we tell gcc
> that they can't alias.
No they cannot alias.
M
On Thu, Nov 17, 2011 at 02:56:31PM -1000, Richard Henderson wrote:
> On 11/17/2011 01:56 AM, Alan Modra wrote:
> > This is part of work in progress getting locking back into shape on
> > powerpc. (If we ever were in shape, which is doubtful.) Using the
> > ia64 version means we have a needless sy
On 11/17/2011 01:56 AM, Alan Modra wrote:
> This is part of work in progress getting locking back into shape on
> powerpc. (If we ever were in shape, which is doubtful.) Using the
> ia64 version means we have a needless sync at the start of
> gomp_mutex_lock (courtesy of __sync_val_compare_and_sw
