[clang] [Clang][OpenCL][AMDGPU] Allow a kernel to call another kernel (PR #115821)

[via cfe-commits]

BukeBeyond wrote:

This commit breaks a critical optimization for us.  We have a project that compiles most of the C++26 language features to Vulkan SPIRV.  One optimization we rely on is the elimination of global variables.  Generating a second stub copy of the kernel breaks this optimization.

While we disabled the code generation from this commit, a better and more general solution may be to introduce a Clang flag like -fno-opencl-kernel-stub.  This may allow other ambitious projects like ours to pursue modern C++ on Vulkan.  We will soon open-source our project, which we envision will also benefit the AMD community.


https://github.com/llvm/llvm-project/pull/115821