On Mon, Jun 22, 2015 at 10:50 AM, Matthew Wahab <matthew.wa...@arm.com> wrote: > This is the ARM version of the patches to strengthen memory barriers for the > __sync builtins on ARMv8 targets > (https://gcc.gnu.org/ml/gcc-patches/2015-05/msg01989.html). > > This patch changes the code generated for __sync_type_compare_and_swap to > remove > the acquire-barrier from the load and end the operation with a fence. This > also > strengthens the acquire barrier generated for __sync_lock_test_and_set > which, > like compare-and-swap, is implemented as a form of atomic exchange. > > Tested as part of a series for arm-none-linux-gnueabihf with check-gcc. > > Ok for trunk? > Matthew > > gcc/ > 2015-06-22 Matthew Wahab <matthew.wa...@arm.com> > > PR Target/65697
s/Target/target > * config/armc/arm.c (arm_split_compare_and_swap): For ARMv8, replace > an > initial acquire barrier with a final full barrier. > OK. Ramana
