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20004d4bdd
Export kernel descriptor for amdgpu kernels The host runtime (HIP or HSA) expects a kernel descriptor object for each kernel in the ELF file. The amdgpu LLVM backend generates the object. It is created as a symbol with the name of the kernel plus a `.kd` suffix. Add it to the exported symbols in the linker script, so that it can be found. For reference, the symbol is created here in LLVM:d5457e4c16/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp (L966)I wrote [a test](6a9115b121) for this as well, I’ll add that once the target is merged and working. With this, all PRs to get working code for amdgpu are open (this + the target + the two patches adding addrspacecasts for alloca and global variables). Tracking issue: #135024 r? `@workingjubilee`
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.