boomanaiden154 wrote: This is the cc1 invocation that is causing things to fail (on the example provided in the comment above): ``` /home/gha/llvm-project/build/bin/clang-22 -cc1 -triple nvptx64-nvidia-cuda -aux-triple x86_64-unknown-linux-gnu -fsyntax-only -disable-free -clear-ast-before-backend -main-file-name test.c -mrelocation-model static -mframe-pointer=all -fno-rounding-math -no-integrated-as -aux-target-cpu x86-64 -fcuda-is-device -mllvm -enable-memcpyopt-without-libcalls -fno-threadsafe-statics -target-cpu sm_52 -target-feature +ptx42 -debugger-tuning=gdb -fno-dwarf-directory-asm -fdebug-compilation-dir=/home/gha/llvm-project/build -resource-dir /home/gha/llvm-project/build/lib/clang/22 -internal-isystem /home/gha/llvm-project/build/lib/clang/22/include/cuda_wrappers -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/x86_64-linux-gnu/c++/13 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/backward -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/x86_64-linux-gnu/c++/13 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/backward -internal-isystem /home/gha/llvm-project/build/lib/clang/22/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/13/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -internal-isystem /home/gha/llvm-project/build/lib/clang/22/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/13/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -fno-autolink -ferror-limit 19 -fmessage-length=451 --offload-new-driver --no-offloadlib -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -cuid=bc129a722f93e87b -D__GCC_HAVE_DWARF2_CFI_ASM=1 -x cuda /tmp/test.c ```
It looks like something in the CUDA flags enables the `__cpuidex` builtin, and then we aren't detecting it with `__has_builtin` because the host is the aux triple. It's the same flow as the offloading test in `__cpuidex_conflict.c`, but it seems like CUDA is handling things differently. I need to spend a bit more time investigating. https://github.com/llvm/llvm-project/pull/126324 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
