make atomic tests in prog var testing optional

This is helpful for testing progvars on implementations not implementing
all the optional atomic features.

test_conformance/basic/test_progvar.cpp

@@ -48,6 +48,7 @@
 #include <sys/stat.h>
 #include "harness/typeWrappers.h"
 #include "harness/errorHelpers.h"
+#include "harness/featureHelpers.h"
 #include "harness/mt19937.h"
 #include "procs.h"
 
@@ -57,6 +58,7 @@
 static int l_has_double = 0;
 static int l_has_half = 0;
 static int l_64bit_device = 0;
+static int l_has_atomics = 1;
 static int l_has_int64_atomics = 0;
 static int l_has_intptr_atomics = 0;
 static int l_has_cles_int64 = 0;
@@ -398,7 +400,7 @@ class StringTable {
 ////////////////////
 // File scope function declarations
 
-static void l_load_abilities(cl_device_id device);
+static int l_load_abilities(cl_device_id device);
 static const char* l_get_fp64_pragma(void);
 static const char* l_get_cles_int64_pragma(void);
 static int l_build_type_table(cl_device_id device);
@@ -547,12 +549,26 @@ static cl_int print_build_log(cl_program program, cl_uint num_devices,
     return error;
 }
 
-static void l_load_abilities(cl_device_id device)
+static int l_load_abilities(cl_device_id device)
 {
     l_has_half = is_extension_available(device, "cl_khr_fp16");
     l_has_double = is_extension_available(device, "cl_khr_fp64");
     l_has_cles_int64 = is_extension_available(device, "cles_khr_int64");
 
+    if (get_device_cl_version(device) >= Version(3, 0))
+    {
+        OpenCLCFeatures features;
+        int ret = get_device_cl_c_features(device, features);
+        if (ret)
+        {
+            log_error("Couldn't query OpenCL C features for the device!\n");
+            return ret;
+        }
+
+        l_has_atomics = features.supports__opencl_c_atomic_order_seq_cst
+            && features.supports__opencl_c_atomic_scope_device;
+    }
+
     l_has_int64_atomics =
         is_extension_available(device, "cl_khr_int64_base_atomics")
         && is_extension_available(device, "cl_khr_int64_extended_atomics");
@@ -566,7 +582,8 @@ static void l_load_abilities(cl_device_id device)
     }
 
     // 32-bit devices always have intptr atomics.
-    l_has_intptr_atomics = !l_64bit_device || l_has_int64_atomics;
+    l_has_intptr_atomics =
+        l_has_atomics && (!l_64bit_device || l_has_int64_atomics);
 
     union {
         char c[4];
@@ -608,6 +625,8 @@ static void l_load_abilities(cl_device_id device)
                         "CL_DEVICE_LINKER_AVAILABLE failed."))
             return;
     }
+
+    return TEST_PASS;
 }
 
 
@@ -649,7 +668,9 @@ static int l_build_type_table(cl_device_id device)
     const char* intptr_atomics[] = { "atomic_intptr_t", "atomic_uintptr_t",
                                      "atomic_size_t", "atomic_ptrdiff_t" };
 
-    l_load_abilities(device);
+    int ret = l_load_abilities(device);
+    if (ret) return CL_INVALID_DEVICE;
+
     num_type_info = 0;
 
     // Boolean.
@@ -688,6 +709,7 @@ static int l_build_type_table(cl_device_id device)
     // Atomic types.
     for (iscalar = 0; iscalar < sizeof(atomics) / sizeof(atomics[0]); ++iscalar)
     {
+        if (!l_has_atomics) continue;
         if (!l_has_int64_atomics && strstr(atomics[iscalar], "long")) continue;
         if (!(l_has_int64_atomics && l_has_double)
             && strstr(atomics[iscalar], "double"))