utests: Add one case to test negative index array access.

Signed-off-by: Zhigang Gong <zhigang.gong@intel.com>
Reviewed-by: Ruiling Song <ruiling.song@intel.com>

3 files changed, 55 insertions, 0 deletions

diff --git a/kernels/compiler_array4.cl b/kernels/compiler_array4.cl
new file mode 100644
index 00000000..6ddc9732
--- /dev/null
+++ b/kernels/compiler_array4.cl
@@ -0,0 +1,9 @@
+__kernel void
+compiler_array4(__global int4 *src4, __global int4 *dst4, int offset)
+{
+  int i;
+  int final[16];
+  __global int *dst = (__global int *)(dst4 + offset + get_global_id(0));
+  __global int *src = (__global int *)(src4 + offset + get_global_id(0));
+  dst[-4] = src[-4];
+}
diff --git a/utests/CMakeLists.txt b/utests/CMakeLists.txt
index 4ad80f09..603338f6 100644
--- a/utests/CMakeLists.txt
+++ b/utests/CMakeLists.txt
@@ -36,6 +36,7 @@ set (utests_sources
   compiler_array1.cpp
   compiler_array2.cpp
   compiler_array3.cpp
+  compiler_array4.cpp
   compiler_byte_scatter.cpp
   compiler_ceil.cpp
   compiler_clz_short.cpp
diff --git a/utests/compiler_array4.cpp b/utests/compiler_array4.cpp
new file mode 100644
index 00000000..51b6d609
--- /dev/null
+++ b/utests/compiler_array4.cpp
@@ -0,0 +1,45 @@
+#include "utest_helper.hpp"
+
+static void cpu(int global_id, int *src, int *dst) {
+  dst[global_id * 4] = src[global_id * 4];
+}
+
+void compiler_array4(void)
+{
+  const size_t n = 16;
+  int cpu_dst[64], cpu_src[64];
+
+  // Setup kernel and buffers
+  OCL_CREATE_KERNEL("compiler_array4");
+  OCL_CREATE_BUFFER(buf[0], 0, n * sizeof(uint32_t) * 4, NULL);
+  OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(uint32_t) * 4, NULL);
+  uint32_t offset = 1;
+  OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
+  OCL_SET_ARG(1, sizeof(cl_mem), &buf[1]);
+  OCL_SET_ARG(2, sizeof(offset), &offset);
+  globals[0] = 16;
+  locals[0] = 16;
+
+  // Run random tests
+  for (uint32_t pass = 0; pass < 8; ++pass) {
+    OCL_MAP_BUFFER(0);
+    for (int32_t i = 0; i < (int32_t) n; ++i)
+      cpu_src[i * 4] = ((int32_t*)buf_data[0])[i * 4] = rand() % 16;
+    OCL_UNMAP_BUFFER(0);
+
+    // Run the kernel on GPU
+    OCL_NDRANGE(1);
+
+    // Run on CPU
+    for (int32_t i = 0; i <(int32_t) n; ++i) cpu(i, cpu_src, cpu_dst);
+
+    // Compare
+    OCL_MAP_BUFFER(1);
+    for (int32_t i = 0; i < 11; ++i) {
+      OCL_ASSERT(((int32_t*)buf_data[1])[i * 4] == cpu_dst[i * 4]);
+    }
+    OCL_UNMAP_BUFFER(1);
+  }
+}
+
+MAKE_UTEST_FROM_FUNCTION(compiler_array4);