[SYCL] Release specialization constant buffer (#643)

Author: HabKaffee

SYCL/SpecConstants/2020/non_native/SpecConstBuffer.cpp

@@ -0,0 +1,22 @@
+// REQUIRES: opencl-aot, cpu
+
+// RUN: %clangxx -fsycl -fsycl-targets=spir64_x86_64 %S/Inputs/common.cpp -o %t.out \
+// RUN:          -fsycl-dead-args-optimization
+// RUN: env SYCL_PI_TRACE=-1 %CPU_RUN_PLACEHOLDER %t.out | FileCheck %s
+
+#include <sycl/sycl.hpp>
+
+const static sycl::specialization_id<int> SpecConst{42};
+
+int main() {
+  sycl::queue Q;
+  Q.submit([&](sycl::handler &CGH) {
+    CGH.set_specialization_constant<SpecConst>(1);
+    CGH.single_task<class KernelName>([=](sycl::kernel_handler KH) {
+      (void)KH.get_specialization_constant<SpecConst>();
+    });
+  });
+  Q.wait();
+  return 0;
+  // CHECK: piMemRelease
+}