Implement wait_group_events builtin v2

This is a simple default implemetation which just calls barrier().

v2:
  - Only call barrier() once.

llvm-svn: 219006

1 files changed, 5 insertions, 0 deletions

diff --git a/libclc/generic/lib/async/wait_group_events.cl b/libclc/generic/lib/async/wait_group_events.cl
new file mode 100644
index 00000000000..05c9d58db45
--- /dev/null
+++ b/libclc/generic/lib/async/wait_group_events.cl
@@ -0,0 +1,5 @@
+#include <clc/clc.h>
+
+_CLC_DEF void wait_group_events(int num_events, event_t *event_list) {
+  barrier(CLK_LOCAL_MEM_FENCE | CLK_GLOBAL_MEM_FENCE);
+}