On Fri, May 22, 2015 at 9:40 AM, Jason Merrill <ja...@redhat.com> wrote: > On 05/22/2015 07:23 AM, Ramana Radhakrishnan wrote: >> >> + /* Load the guard value only through an atomic acquire load. */ >> + guard = build_atomic_load (guard, MEMMODEL_ACQUIRE); >> + >> /* Check to see if the GUARD is zero. */ >> guard = get_guard_bits (guard); > > > I wonder if these calls should be reversed, to express that we're only > trying to atomically load a byte (on non-ARM targets)?
That expresses the semantics more directly, but will that lead to less efficient code on some RISC architectures? - David
