[SYCL][InvokeSIMD] Add test for invoke_simd return type error

sycl/test/invoke_simd/return-type-mismatch-error.cpp

@@ -0,0 +1,30 @@
+// RUN: not %clangxx -fsycl -fsycl-device-only -S %s -o /dev/null 2>&1 | FileCheck %s
+#include <sycl/ext/oneapi/experimental/invoke_simd.hpp>
+#include <sycl/sycl.hpp>
+
+using namespace sycl::ext::oneapi::experimental;
+using namespace sycl;
+namespace esimd = sycl::ext::intel::esimd;
+
+[[intel::device_indirectly_callable]] simd<int, 4> callee(simd<int, 8>) {
+  return simd<int, 4>();
+}
+
+void foo() {
+  constexpr unsigned Size = 1024;
+  constexpr unsigned GroupSize = 64;
+  sycl::range<1> GlobalRange{Size};
+  sycl::range<1> LocalRange{GroupSize};
+  sycl::nd_range<1> Range(GlobalRange, LocalRange);
+  queue q;
+  auto e = q.submit([&](handler &cgh) {
+    cgh.parallel_for(Range, [=](nd_item<1> ndi) {
+      invoke_simd(ndi.get_sub_group(), callee, 0);
+    });
+  });
+}
+
+int main() {
+  foo();
+  // CHECK: {{.*}}error:{{.*}}static assertion failed due to requirement 'RetVecLength == 8': invoke_simd callee return type vector length must match kernel subgroup size{{.*}}
+}