Basic/std_array.cpp failing on Windows GEN12 post commit

[kbenzie]

As noted by @sarnex in this comment on #18400:

@ianayl @aelovikov-intel It looks like the std::array test is failing in Gen12 Win postcommit after this PR, can you take a look? Thx

https://github.com/intel/llvm/actions/runs/14999424550/job/42152662548

FAIL: SYCL :: Basic/std_array.cpp (407 of 2364)
******************** TEST 'SYCL :: Basic/std_array.cpp' FAILED ********************
Exit Code: 3221225477

Command Output (stdout):
--
# RUN: at line 5
D:/github/_work/llvm/llvm/install/bin/clang++.exe  -Werror --driver-mode=cl -fsycl -o D:\github\_work\llvm\llvm\build-e2e\Basic\Output\std_array.cpp.tmp.exe D:\github\_work\llvm\llvm\llvm\sycl\test-e2e\Basic\std_array.cpp /Od /MDd /Zi /EHsc
# executed command: D:/github/_work/llvm/llvm/install/bin/clang++.exe -Werror --driver-mode=cl -fsycl -o 'D:\github\_work\llvm\llvm\build-e2e\Basic\Output\std_array.cpp.tmp.exe' 'D:\github\_work\llvm\llvm\llvm\sycl\test-e2e\Basic\std_array.cpp' /Od /MDd /Zi /EHsc
# RUN: at line 6
env ONEAPI_DEVICE_SELECTOR=level_zero:gpu  D:\github\_work\llvm\llvm\build-e2e\Basic\Output\std_array.cpp.tmp.exe
# executed command: env ONEAPI_DEVICE_SELECTOR=level_zero:gpu 'D:\github\_work\llvm\llvm\build-e2e\Basic\Output\std_array.cpp.tmp.exe'
# note: command had no output on stdout or stderr
# error: command failed with exit status: 0xc0000005

--

********************

[kbenzie]

Since this doesn't fail in pre-commit it must be something to do with the post-commit config.

[ianayl]

Reproducer:
Using oneapi compiler 2025.1 environment, gfx 101.6734, MSVC 2022 17.13.4, and spirv-tools on Windows:

#include <sycl/queue.hpp>

int main() {
  sycl::queue q;
}

Compiling with clang-cl -fsycl reproducer.cpp /MDd in 2025.1 oneapi environment and running resulting executable results in 0xc0000005 NTSTATUS error.

.... Still need to fix the issue though 😅 But it does mean the issue is unrelated to changes from #18400.

[aelovikov-intel]

What happens is ur_loader.dll depends on libmmd.dll when built with OneAPI compiler. Yet

llvm/sycl/ur_win_proxy_loader/ur_win_proxy_loader.cpp

Lines 155 to 160 in 372526e

	auto loadAdapter = [&](auto adapterName,
	DWORD flags = LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR |
	LOAD_LIBRARY_SEARCH_SYSTEM32) {
	auto path = LibSYCLDir / adapterName;
	return LoadLibraryEx(path.wstring().c_str(), NULL, flags);
	};

prohibits libmmd.dll from being loaded when trying to load ur_loader.dll.

Looking into how to fix our CI, but there is no user-visible bug here.