Fix D3D12Core.dll loading problem for debug build

CMakeLists.txt

@@ -487,13 +487,21 @@ endif()
 
 if(SLANG_ENABLE_PREBUILT_BINARIES)
     if(CMAKE_SYSTEM_NAME MATCHES "Windows")
+        # DX Agility SDK requires the D3D12*.DLL files to be placed under a sub-directory, "D3D12".
+        # https://devblogs.microsoft.com/directx/gettingstarted-dx12agility/#d3d12sdkpath-should-not-be-the-same-directory-as-the-application-exe
         file(GLOB prebuilt_binaries "${CMAKE_SOURCE_DIR}/external/slang-binaries/bin/windows-x64/*")
+        file(GLOB prebuilt_d3d12_binaries "${CMAKE_SOURCE_DIR}/external/slang-binaries/bin/windows-x64/[dD]3[dD]12*")
+        list(REMOVE_ITEM prebuilt_binaries ${prebuilt_d3d12_binaries})
         add_custom_target(
             copy-prebuilt-binaries ALL
             COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_BINARY_DIR}/$<CONFIG>/${runtime_subdir}
             COMMAND ${CMAKE_COMMAND} -E copy_if_different 
                 ${prebuilt_binaries}
                 ${CMAKE_BINARY_DIR}/$<CONFIG>/${runtime_subdir}
+            COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_BINARY_DIR}/$<CONFIG>/${runtime_subdir}/D3D12
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                ${prebuilt_d3d12_binaries}
+                ${CMAKE_BINARY_DIR}/$<CONFIG>/${runtime_subdir}/D3D12
             VERBATIM
         )
     endif()

source/core/slang-render-api-util.cpp

@@ -267,17 +267,9 @@ static bool _canLoadSharedLibrary(const char* libName)
 #if SLANG_WINDOWS_FAMILY
         case RenderApiType::Vulkan: return _canLoadSharedLibrary("vulkan-1") || _canLoadSharedLibrary("vk_swiftshader");
         case RenderApiType::WebGPU:
-#if _DEBUG
-            // At the moment, some CI issue is preventing tests to run in Debug builds.
-            // As a work-around in order to allow us to enable tests in Release builds ASSP,
-            // we skip WebGPU tests in by returning false here.
-            // https://github.com/shader-slang/slang/issues/5233#issuecomment-2411380030
-            return false;
-#else
             return _canLoadSharedLibrary("webgpu_dawn") &&
                 _canLoadSharedLibrary("dxcompiler") &&
                 _canLoadSharedLibrary("dxil");
-#endif // if SLANG_DEBUG
 #elif SLANG_APPLE_FAMILY
         case RenderApiType::Vulkan: return true;
         case RenderApiType::Metal:  return true;

tools/render-test/slang-support.cpp

@@ -122,6 +122,9 @@ void ShaderCompilerUtil::Output::reset()
         case SLANG_SOURCE_LANGUAGE_CUDA:
             spAddPreprocessorDefine(slangRequest, "__CUDA__", "1");
             break;
+        case SLANG_SOURCE_LANGUAGE_WGSL:
+            spAddPreprocessorDefine(slangRequest, "__WGSL__", "1");
+            break;
 
         default:
             assert(!"unexpected");

tools/slang-test/slang-test-main.cpp

@@ -1132,7 +1132,8 @@ static SlangResult _extractRenderTestRequirements(const CommandLine& cmdLine, Te
             break;
         case RenderApiType::WebGPU:
             target = SLANG_WGSL;
-            SLANG_ASSERT(!usePassthru);
+            nativeLanguage = SLANG_SOURCE_LANGUAGE_WGSL;
+            passThru = SLANG_PASS_THROUGH_TINT;
             break;
     }
 
@@ -4661,6 +4662,7 @@ SlangResult innerMain(int argc, char** argv)
             for (auto& test : context.failedFileTests)
             {
                 FileTestInfoImpl* fileTestInfo = static_cast<FileTestInfoImpl*>(test.Ptr());
+                TestReporter::SuiteScope suiteScope(&reporter, "tests");
                 TestReporter::TestScope scope(&reporter, fileTestInfo->testName);
                 reporter.addResult(TestResult::Fail);
             }