[HIP] Add test libstd_functional

[yaxunl]

Summary

This patch adds a test for using <functional> in HIP device code.

[ashi1]

Looks good, let me verify on HIP builder.

[yaxunl]

In D102508#2759905, @ashi1 wrote:

Looks good, let me verify on HIP builder.

It depends on https://reviews.llvm.org/D102507

[ashi1]

In D102508#2759906, @yaxunl wrote:

In D102508#2759905, @ashi1 wrote:

Looks good, let me verify on HIP builder.

It depends on https://reviews.llvm.org/D102507

Okay, let's wait for that to merge first. Thanks.

External/HIP/CMakeLists.txt

 include(External)
 include(GPUTestVariant)
 llvm_externals_find(TEST_SUITE_HIP_ROOT "hip" "HIP prerequisites")
 
 # Create targets for HIP tests that are part of the test suite.
 macro(create_local_hip_tests VariantSuffix)
   set(VariantOffload "hip")
+  # Set per-source compilation/link options
+  set_source_files_properties(stdlib_functional.hip PROPERTIES
+    COMPILE_FLAGS -stdlib=libc++)
   # Add HIP tests to be added to hip-tests-simple
   list(APPEND HIP_LOCAL_TESTS empty)
+  list(APPEND HIP_LOCAL_TESTS stdlib_functional)
   list(APPEND HIP_LOCAL_TESTS saxpy)
   foreach(_hip_test IN LISTS HIP_LOCAL_TESTS)
     create_one_local_test(${_hip_test} ${_hip_test}.hip
                           ${VariantOffload} ${VariantSuffix}
                           "${VariantCPPFLAGS}" "${VariantLibs}")
   endforeach()
 endmacro()
 

External/HIP/stdlib_functional.hip

+#include <hip/hip_runtime.h>
+#include <stdio.h>
+#include <functional>
+
+#if !__HIP_USE_LIBCPP
+#error "This test requests -stdlib=libc++"
+#endif // __HIP_USE_LIBCPP
+
+__managed__ int x;
+
+__global__ void kern() {
+  auto plus = std::plus<int>();
+  auto plus2 = std::bind(plus, std::placeholders::_1, 2);
+  x = plus2(x);
+}
+
+int main() {
+  kern<<<1,1>>>();
+  hipDeviceSynchronize();
+  if (x != 2) {
+    printf("FAILED!\n");
+    return 1;
+  }
+
+  printf("PASSED!\n");
+  return 0;
+}

External/HIP/stdlib_functional.reference_output

+PASSED!
+exit 0