Fix entrypoint auto discovery logic. (#5885)

* Fix entrypoint auto discovery logic.

* format code

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/tools/slang-unit-test/unit-test-cuda-compile.cpp b/tools/slang-unit-test/unit-test-cuda-compile.cpp
new file mode 100644
index 000000000..280871dac
--- /dev/null
+++ b/tools/slang-unit-test/unit-test-cuda-compile.cpp
@@ -0,0 +1,56 @@
+// unit-test-cuda-compile.cpp
+
+#include "../../source/core/slang-io.h"
+#include "../../source/core/slang-process.h"
+#include "slang-com-ptr.h"
+#include "slang.h"
+#include "unit-test/slang-unit-test.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+using namespace Slang;
+
+// Test that the compilation API can be used to produce CUDA source.
+
+SLANG_UNIT_TEST(CudaCompile)
+{
+    // Source for a module that contains an undecorated entrypoint.
+    const char* userSourceBody = R"(
+        [CudaDeviceExport]
+        float testExportedFunc(float3 particleRayOrigin)
+        {
+            return dot(particleRayOrigin,particleRayOrigin); 
+        };
+        )";
+
+    auto moduleName = "moduleG" + String(Process::getId());
+    ComPtr<slang::IGlobalSession> globalSession;
+    SLANG_CHECK(slang_createGlobalSession(SLANG_API_VERSION, globalSession.writeRef()) == SLANG_OK);
+    slang::TargetDesc targetDesc = {};
+    targetDesc.format = SLANG_CUDA_SOURCE;
+    slang::SessionDesc sessionDesc = {};
+    sessionDesc.targetCount = 1;
+    sessionDesc.targets = &targetDesc;
+    ComPtr<slang::ISession> session;
+    SLANG_CHECK(globalSession->createSession(sessionDesc, session.writeRef()) == SLANG_OK);
+
+    ComPtr<slang::IBlob> diagnosticBlob;
+    auto module = session->loadModuleFromSourceString(
+        "m",
+        "m.slang",
+        userSourceBody,
+        diagnosticBlob.writeRef());
+    SLANG_CHECK(module != nullptr);
+
+    ComPtr<slang::IComponentType> linkedProgram;
+    module->link(linkedProgram.writeRef(), diagnosticBlob.writeRef());
+    SLANG_CHECK(linkedProgram != nullptr);
+
+    ComPtr<slang::IBlob> code;
+    linkedProgram->getTargetCode(0, code.writeRef(), diagnosticBlob.writeRef());
+    SLANG_CHECK(code != nullptr);
+    SLANG_CHECK(code->getBufferSize() != 0);
+    String text = String((char*)code->getBufferPointer());
+    SLANG_CHECK(text.indexOf("testExportedFunc") > 0);
+}