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Code Execution with Pre-trained Language Models

Code execution is a fundamental aspect of programming language semantics that reflects the exact behavior of the code. However, most pretrained models for code intelligence ignore the execution trace and only rely on source code and syntactic structures. In this paper, the authors aim to teach pretrained models the real-world code execution process. They propose CodeExecutor, a Transformer-based model that learns to execute arbitrary programs and predict their execution traces.