Added tests

Signed-off-by: Rauf, Rana <[email protected]>

Author: raaiq1

sycl/test/basic_tests/iostream_clean_compile_1.cpp

@@ -0,0 +1,5 @@
+// RUN: %clangxx -Werror -fsycl %s -c
+
+#include <iostream>
+#include <sycl/sycl.hpp>
+void foo() { std::cout << 42; }

sycl/test/basic_tests/iostream_clean_compile_2.cpp

@@ -0,0 +1,7 @@
+// RUN: %clangxx -Werror -fsycl %s -c
+
+// clang-format off
+#include <sycl/sycl.hpp>
+#include <iostream>
+// clang-format on
+void foo() { std::cout << 42; }

sycl/test/basic_tests/no_iostream.cpp

@@ -0,0 +1,9 @@
+// RUN: %clangxx -fsycl %s -S -emit-llvm -o- | FileCheck %s
+// CHECK-NOT: @_ZStL8__ioinit = internal global %"class.std::ios_base::Init"
+//
+// Tests if <sycl/sycl.hpp> headers include any <iostream> headers
+
+#include <sycl/sycl.hpp>
+using namespace sycl;
+
+int main() { return 0; }