Index: include/clang/Basic/BuiltinsAMDGPU.def
===================================================================
--- include/clang/Basic/BuiltinsAMDGPU.def
+++ include/clang/Basic/BuiltinsAMDGPU.def
@@ -45,6 +45,8 @@
 BUILTIN(__builtin_amdgcn_wave_barrier, "v", "n")
 BUILTIN(__builtin_amdgcn_s_dcache_inv, "v", "n")
 BUILTIN(__builtin_amdgcn_buffer_wbinvl1, "v", "n")
+BUILTIN(__builtin_amdgcn_ds_gws_init, "vUiUi", "n")
+BUILTIN(__builtin_amdgcn_ds_gws_barrier, "vUiUi", "n")
 
 // FIXME: Need to disallow constant address space.
 BUILTIN(__builtin_amdgcn_div_scale, "dddbb*", "n")
Index: test/CodeGenOpenCL/builtins-amdgcn.cl
===================================================================
--- test/CodeGenOpenCL/builtins-amdgcn.cl
+++ test/CodeGenOpenCL/builtins-amdgcn.cl
@@ -548,6 +548,18 @@
   *out = __builtin_amdgcn_ds_consume(ptr);
 }
 
+// CHECK-LABEL: @test_gws_init(
+// CHECK: call void @llvm.amdgcn.ds.gws.init(i32 %value, i32 %id)
+kernel void test_gws_init(uint value, uint id) {
+  __builtin_amdgcn_ds_gws_init(value, id);
+}
+
+// CHECK-LABEL: @test_gws_barrier(
+// CHECK: call void @llvm.amdgcn.ds.gws.barrier(i32 %value, i32 %id)
+kernel void test_gws_barrier(uint value, uint id) {
+  __builtin_amdgcn_ds_gws_barrier(value, id);
+}
+
 // CHECK-DAG: [[$WI_RANGE]] = !{i32 0, i32 1024}
 // CHECK-DAG: attributes #[[$NOUNWIND_READONLY:[0-9]+]] = { nounwind readonly }
 // CHECK-DAG: attributes #[[$READ_EXEC_ATTRS]] = { convergent }