The ONNC Compiler is an advanced suite of C++ libraries designed to enhance the efficiency of deep learning accelerators. It facilitates the transformation of neural networks into distinct machine instructions, optimizing across varying architectures from simple single-core systems to complex multicore systems with layered memory hierarchies. Supporting prominent frameworks such as PyTorch and TensorFlow, the compiler ensures seamless integration for a wide array of AI systems, particularly those focusing on heterogeneous multicore designs.