llvm-project

733be4ed - [mlir][spirv] Add GpuToLLVM cconv suited to Vulkan, migrate last tests (#123384)

[mlir][spirv] Add GpuToLLVM cconv suited to Vulkan, migrate last tests (#123384) This commit is a follow-up to 99a562b3cb17e89273ba0fe77129f2fb17a19381, which migrated some of the mlir-vulkan-runner tests to mlir-cpu-runner using a new pipeline and set of wrappers. That commit could not migrate all the tests, because the existing calling conventions/ABIs for kernel arguments generated by GPUToLLVMConversionPass were not a good fit for the Vulkan runtime. This commit fixes this and migrates the remaining tests. With this commit, mlir-vulkan-runner and many related components are now unused, and they will be removed in a later commit (see #73457). The old calling conventions require both the caller (host LLVM code) and callee (device code) to have compile-time knowledge of the precise argument types. This works for CUDA, ROCm and SYCL, where there is a C-like calling convention agreed between the host and device code, and the runtime passes through arguments as raw data without comprehension. For Vulkan, however, the interface declared by the shader/kernel is in a more abstract form, so the device code has indirect access to the argument data, and the runtime must process the arguments to set up and bind appropriately-sized buffer descriptors. This commit introduces a new calling convention option to meet the Vulkan runtime's needs. It lowers memref arguments to {void*, size_t} pairs, which can be trivially interpreted by the runtime without it needing to know the original argument types. Unlike the stopgap measure in the previous commit, this system can support memrefs of various ranks and element types, which unblocked migrating the remaining tests.