llvm-project

128caa1b - [mlir][bufferization] Refine tensor-buffer compatibility checks (#167705)

[mlir][bufferization] Refine tensor-buffer compatibility checks (#167705) Generally, to_tensor and to_buffer already perform sufficient verification. However, there are some unnecessarily strict constraints: * builtin tensor requires its buffer counterpart to always be memref * to_buffer on ranked tensor requires to always return memref These checks are assertions (i.e. preconditions), however, they actually prevent an apparently useful bufferization where builtin tensors could become custom buffers. Lift these assertions, maintaining the verification procedure unchanged, to allow builtin -> custom bufferizations at operation boundary level.