Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -2127,6 +2127,7 @@
       Opts.cl_khr_int64_base_atomics = 1;
       Opts.cl_khr_int64_extended_atomics = 1;
       Opts.cl_khr_mipmap_image = 1;
+      Opts.cl_khr_subgroups = 1;
       Opts.cl_khr_3d_image_writes = 1;
     }
   }
Index: test/Misc/amdgcn.languageOptsOpenCL.cl
===================================================================
--- test/Misc/amdgcn.languageOptsOpenCL.cl
+++ test/Misc/amdgcn.languageOptsOpenCL.cl
@@ -199,11 +199,17 @@
 #pragma OPENCL EXTENSION cl_khr_srgb_image_writes: enable
 // expected-warning@-1{{unsupported OpenCL extension 'cl_khr_srgb_image_writes' - ignoring}}
 
+#if (__OPENCL_C_VERSION__ >= 200)
+#ifndef cl_khr_subgroups
+#error "Missing cl_khr_subgroups define"
+#endif
+#else
 #ifdef cl_khr_subgroups
 #error "Incorrect cl_khr_subgroups define"
 #endif
+// expected-warning@+2{{unsupported OpenCL extension 'cl_khr_subgroups' - ignoring}}
+#endif
 #pragma OPENCL EXTENSION cl_khr_subgroups: enable
-// expected-warning@-1{{unsupported OpenCL extension 'cl_khr_subgroups' - ignoring}}
 
 #ifdef cl_khr_terminate_context
 #error "Incorrect cl_khr_terminate_context define"
Index: test/SemaOpenCL/extension-version.cl
===================================================================
--- test/SemaOpenCL/extension-version.cl
+++ test/SemaOpenCL/extension-version.cl
@@ -247,6 +247,9 @@
 #error "Missing cl_khr_subgroups define"
 #endif
 #else
+#ifdef cl_khr_subgroups
+#error "Incorrect cl_khr_subgroups define"
+#endif
 // expected-warning@+2{{unsupported OpenCL extension 'cl_khr_subgroups' - ignoring}}
 #endif
 #pragma OPENCL EXTENSION cl_khr_subgroups: enable