re PR go/84215 (Random results in go/libgo tests)

	PR go/84215
    runtime, sync/atomic: use write barrier for atomic pointer functions
    
    This copies atomic_pointer.go from 1.10rc2.  It was omitted during the
    transition of the runtime from C to Go, and I forgot about it.
    
    This may help with https://gcc.gnu.org/PR84215.
    
    Reviewed-on: https://go-review.googlesource.com/93197

From-SVN: r257599

1 files changed, 0 insertions, 34 deletions

diff --git a/libgo/go/sync/atomic/atomic.c b/libgo/go/sync/atomic/atomic.c
index 32cbf03..07a4306 100644
--- a/libgo/go/sync/atomic/atomic.c
+++ b/libgo/go/sync/atomic/atomic.c
@@ -62,16 +62,6 @@ SwapUintptr (uintptr_t *addr, uintptr_t new)
   return __atomic_exchange_n (addr, new, __ATOMIC_SEQ_CST);
 }
 
-void *SwapPointer (void **, void *)
-  __asm__ (GOSYM_PREFIX "sync_atomic.SwapPointer")
-  __attribute__ ((no_split_stack));
-
-void *
-SwapPointer (void **addr, void *new)
-{
-  return __atomic_exchange_n (addr, new, __ATOMIC_SEQ_CST);
-}
-
 _Bool CompareAndSwapInt32 (int32_t *, int32_t, int32_t)
   __asm__ (GOSYM_PREFIX "sync_atomic.CompareAndSwapInt32")
   __attribute__ ((no_split_stack));
@@ -126,16 +116,6 @@ CompareAndSwapUintptr (uintptr_t *val, uintptr_t old, uintptr_t new)
   return __sync_bool_compare_and_swap (val, old, new);
 }
 
-_Bool CompareAndSwapPointer (void **, void *, void *)
-  __asm__ (GOSYM_PREFIX "sync_atomic.CompareAndSwapPointer")
-  __attribute__ ((no_split_stack));
-
-_Bool
-CompareAndSwapPointer (void **val, void *old, void *new)
-{
-  return __sync_bool_compare_and_swap (val, old, new);
-}
-
 int32_t AddInt32 (int32_t *, int32_t)
   __asm__ (GOSYM_PREFIX "sync_atomic.AddInt32")
   __attribute__ ((no_split_stack));
@@ -357,17 +337,3 @@ StoreUintptr (uintptr_t *addr, uintptr_t val)
   while (! __sync_bool_compare_and_swap (addr, v, val))
     v = *addr;
 }
-
-void StorePointer (void **addr, void *val)
-  __asm__ (GOSYM_PREFIX "sync_atomic.StorePointer")
-  __attribute__ ((no_split_stack));
-
-void
-StorePointer (void **addr, void *val)
-{
-  void *v;
-
-  v = *addr;
-  while (! __sync_bool_compare_and_swap (addr, v, val))
-    v = *addr;
-}