[SYCL][ESIMD] Add regression test for SVM gather/scatter API

SYCL/ESIMD/api/svm_gather_scatter.cpp

@@ -0,0 +1,97 @@
+//==---- svm_gather_scatter.cpp  - DPC++ ESIMD svm gather/scatter test -----==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// REQUIRES: gpu
+// UNSUPPORTED: cuda || hip
+// RUN: %clangxx -fsycl %s -o %t.out
+// RUN: %HOST_RUN_PLACEHOLDER %t.out
+// RUN: %GPU_RUN_PLACEHOLDER %t.out
+
+// Regression test for SVM gather/scatter API.
+
+#include "../esimd_test_utils.hpp"
+
+#include <CL/sycl.hpp>
+#include <CL/sycl/builtins_esimd.hpp>
+#include <algorithm>
+#include <array>
+#include <iostream>
+
+#include <sycl/ext/intel/experimental/esimd.hpp>
+
+using namespace cl::sycl;
+using namespace sycl::ext::intel::experimental;
+using namespace sycl::ext::intel::experimental::esimd;
+
+template <typename T, int N> bool test(queue &Q) {
+  std::cout << "  Running " << typeid(T).name() << " test, N=" << N << "...\n";
+
+  struct Deleter {
+    queue Q;
+    void operator()(T *Ptr) {
+      if (Ptr) {
+        sycl::free(Ptr, Q);
+      }
+    }
+  };
+
+  std::unique_ptr<T, Deleter> Ptr1(sycl::malloc_shared<T>(N, Q), Deleter{Q});
+  std::unique_ptr<T, Deleter> Ptr2(sycl::malloc_shared<T>(N, Q), Deleter{Q});
+
+  T *Src = Ptr1.get();
+  T *Dst = Ptr2.get();
+
+  for (int I = 0; I < N; ++I) {
+    Src[I] = I + 1;
+    Dst[I] = 0;
+  }
+
+  try {
+    Q.submit([&](handler &CGH) {
+       CGH.parallel_for(sycl::range<1>{1}, [=](id<1>) SYCL_ESIMD_KERNEL {
+         simd<uint32_t, N> Offsets(0u, sizeof(T));
+         scatter<T, N>(Dst, Offsets, gather<T, N>(Src, Offsets));
+       });
+     }).wait();
+  } catch (cl::sycl::exception const &E) {
+    std::cout << "ERROR. SYCL exception caught: " << E.what() << std::endl;
+    return false;
+  }
+
+  unsigned NumErrs = 0;
+  for (int I = 0; I < N; ++I)
+    if (Dst[I] != Src[I])
+      if (++NumErrs <= 10)
+        std::cout << "failed at " << I << ": " << Dst[I]
+                  << " (Dst) != " << Src[I] << " (Src)\n";
+
+  std::cout << (NumErrs == 0 ? "    Passed\n" : "    FAILED\n");
+  return NumErrs == 0;
+}
+
+int main(void) {
+  queue Q(esimd_test::ESIMDSelector{}, esimd_test::createExceptionHandler());
+  auto Dev = Q.get_device();
+  std::cout << "Running on " << Dev.get_info<info::device::name>() << "\n";
+
+  bool Pass = true;
+
+  Pass &= test<int8_t, 8>(Q);
+  Pass &= test<int8_t, 16>(Q);
+  Pass &= test<int8_t, 32>(Q);
+
+  Pass &= test<int16_t, 8>(Q);
+  Pass &= test<int16_t, 16>(Q);
+  Pass &= test<int16_t, 32>(Q);
+
+  Pass &= test<int32_t, 8>(Q);
+  Pass &= test<int32_t, 16>(Q);
+  Pass &= test<int32_t, 32>(Q);
+
+  std::cout << (Pass ? "Test Passed\n" : "Test FAILED\n");
+  return Pass ? 0 : 1;
+}