r281543 - [CUDA] Add test checking our ability to take a function pointer to a __global__ function on the host side.

[Justin Lebar via cfe-commits]

Author: jlebar
Date: Wed Sep 14 16:50:11 2016
New Revision: 281543

URL: http://llvm.org/viewvc/llvm-project?rev=281543&view=rev
Log:
[CUDA] Add test checking our ability to take a function pointer to a __global__ function on the host side.

Summary: This functionality is used by Thrust.

Reviewers: tra

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D24581

Added:
    cfe/trunk/test/SemaCUDA/reference-to-kernel-fn.cu

Added: cfe/trunk/test/SemaCUDA/reference-to-kernel-fn.cu
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCUDA/reference-to-kernel-fn.cu?rev=281543&view=auto
==============================================================================
--- cfe/trunk/test/SemaCUDA/reference-to-kernel-fn.cu (added)
+++ cfe/trunk/test/SemaCUDA/reference-to-kernel-fn.cu Wed Sep 14 16:50:11 2016
@@ -0,0 +1,31 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -std=c++11 -fcuda-is-device -fsyntax-only -verify -DDEVICE %s
+
+// Check that we can reference (get a function pointer to) a __global__
+// function from the host side, but not the device side.  (We don't yet support
+// device-side kernel launches.)
+
+#include "Inputs/cuda.h"
+
+struct Dummy {};
+
+__global__ void kernel() {}
+// expected-note at -1 {{declared here}}
+#ifdef DEVICE
+// expected-note at -3 {{declared here}}
+#endif
+
+typedef void (*fn_ptr_t)();
+
+__host__ __device__ fn_ptr_t get_ptr_hd() {
+  return kernel;
+#ifdef DEVICE
+  // expected-error at -2 {{reference to __global__ function}}
+#endif
+}
+__host__ fn_ptr_t get_ptr_h() {
+  return kernel;
+}
+__device__ fn_ptr_t get_ptr_d() {
+  return kernel;  // expected-error {{reference to __global__ function}}
+}