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Description
Describe the bug
Discovered in #19015 which dropped #include <sycl/atomic.hpp> from accessor.hpp, thus influencing the number and order of other headers included into accessor.hpp and core.hpp.
Somehow, on Windows that changed how NAN macro is defined making it non-constexpr anymore. The issue is dependent on MSVC version and/or versions of other Microsoft-provided components (like their Windows SDK or something) - I haven't been able to reproduce it on a Windows machine that's available to me.
# RUN: at line 7
D:/github/_work/llvm/llvm/install/bin/clang++.exe -Werror -fsycl -fsycl-targets=spir64 D:\github\_work\llvm\llvm\llvm\sycl\test-e2e\DeviceLib\exp\exp-std-complex-float-edge-cases.cpp -o D:\github\_work\llvm\llvm\build-e2e\DeviceLib\exp\Output\exp-std-complex-float-edge-cases.cpp.tmp.out
# executed command: D:/github/_work/llvm/llvm/install/bin/clang++.exe -Werror -fsycl -fsycl-targets=spir64 'D:\github\_work\llvm\llvm\llvm\sycl\test-e2e\DeviceLib\exp\exp-std-complex-float-edge-cases.cpp' -o 'D:\github\_work\llvm\llvm\build-e2e\DeviceLib\exp\Output\exp-std-complex-float-edge-cases.cpp.tmp.out'
# .---command stderr------------
# | In file included from D:\github\_work\llvm\llvm\llvm\sycl\test-e2e\DeviceLib\exp\exp-std-complex-float-edge-cases.cpp:10:
# | D:\github\_work\llvm\llvm\llvm\sycl\test-e2e\DeviceLib\exp\exp-std-complex-edge-cases.hpp:24:29: error: constexpr variable 'testcases' must be initialized by a constant expression
# | 24 | constexpr std::complex<T> testcases[] = {
# | | ^ ~
# | 25 | /* 0 */ std::complex<T>(1.e-6, 1.e-6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 26 | /* 1 */ std::complex<T>(-1.e-6, 1.e-6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 27 | /* 2 */ std::complex<T>(-1.e-6, -1.e-6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 28 | /* 3 */ std::complex<T>(1.e-6, -1.e-6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 29 |
# | 30 | /* 4 */ std::complex<T>(1.e+6, 1.e-6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 31 | /* 5 */ std::complex<T>(-1.e+6, 1.e-6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 32 | /* 6 */ std::complex<T>(-1.e+6, -1.e-6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 33 | /* 7 */ std::complex<T>(1.e+6, -1.e-6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 34 |
# | 35 | /* 8 */ std::complex<T>(1.e-6, 1.e+6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 36 | /* 9 */ std::complex<T>(-1.e-6, 1.e+6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 37 | /* 10 */ std::complex<T>(-1.e-6, -1.e+6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 38 | /* 11 */ std::complex<T>(1.e-6, -1.e+6),
# | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 39 |
# | D:\github\_work\llvm\llvm\llvm\sycl\test-e2e\DeviceLib\exp\exp-std-complex-float-edge-cases.cpp:12:21: note: in instantiation of function template specialization 'test<float>' requested here
# | 12 | int main() { return test<float>(); }
# | | ^
# | D:\github\_work\llvm\llvm\llvm\sycl\test-e2e\DeviceLib\exp\exp-std-complex-edge-cases.hpp:63:32: note: floating point arithmetic produces a NaN
# | 63 | /* 32 */ std::complex<T>(NAN, NAN),
# | | ^
# | C:\Program Files (x86)\Windows Kits\10\include\10.0.22[621](https://github.com/intel/llvm/actions/runs/15729393865/job/44326718876#step:27:636).0\ucrt\corecrt_math.h:94:39: note: expanded from macro 'NAN'
# | 94 | #define NAN (-(float)(INFINITY * 0.0F))
# | | ^
# | 1 error generated.
# `-----------------------------
# error: command failed with exit status: 1
To reproduce
See the log snippet above, it contains all commands.
Environment
- OS: Windows
- DPC++ version: latest intel/llvm
Additional context
No response