llvm

aab5d747 - [SYCL][NATIVECPU] Support multiple SYCL targets in the same compiler invocation (#10495)

[SYCL][NATIVECPU] Support multiple SYCL targets in the same compiler invocation (#10495) This PR adds support to multiple SYCL targets alongside `native_cpu` in the same compiler invocation (e.g. `clang++ -fsycl -fsycl-targets=native_cpu,spir64 input.cpp`). In order to implement this we had to make changes to multiple components, here is a quick overview: * Driver: changes in the Driver allow to correctly parse all the targets passed to `-fsycl-targets` (before we were just looking for `native_cpu`, ignoring the others). The Driver now also calls `sycl-post-link` and `clang-offload-wrapper`, performing a compilation flow more similar to the one used for other targets. * Sema: since the kernel name needs to be the same for all the SYCL targets, the change to the kernel name in Sema has been removed, and replaced with an LLVM Pass that gets run when lowering the device module (`llvm/lib/SYCLLowerIR/RenameKernelSYCLNativeCPU.cpp`). * Runtime: The definition for `_pi_program` in the Native CPU Plug-In now supports multiple kernels in one program, and the `__SYCL_PI_DEVICE_BINARY_TARGET_NATIVE_CPU` binary type has been added in order to identify kernels compiled for Native CPU. * clang-offload-wrapper: for Native CPU, the offload-wrapper doesn't bundle the device code in the host module, but instead produces an array containing function declarations that are resolved by the linker, see `sycl/doc/design/SYCLNativeCPU.md` for more information. --------- Co-authored-by: Uwe Dolinsky <uwe@codeplay.com> Co-authored-by: Alexey Sachkov <alexey.sachkov@intel.com> Co-authored-by: Steffen Larsen <steffen.larsen@intel.com>