Fix for barrier call in global_barrier

Due to known error, the barrier() call in global_barrier was not
properly inlined. Use internal builtin instead until the issue
is resolved.

IGC/BiFModule/Implementation/barrier.cl

@@ -314,7 +314,7 @@ uint __intel_get_local_size( void );
 // Implementation of global_barrier using atomic instructions.
 void __global_barrier_atomic()
 {
- barrier(CLK_GLOBAL_MEM_FENCE);
+ __intel_workgroup_barrier(Device, AcquireRelease | CrossWorkgroupMemory);
 
  __global volatile int* syncBuffer = (__global volatile int*)__builtin_IB_get_sync_buffer();
 
@@ -335,7 +335,7 @@ void __global_barrier_atomic()
  while (atomic_or(syncBuffer, 0) != 0) {}
  }
 
- barrier(CLK_GLOBAL_MEM_FENCE);
+ __intel_workgroup_barrier(Device, AcquireRelease | CrossWorkgroupMemory);
 }
 
 // Implementation of global_barrier without using atomic instructions except for fences.