Large Language Models for cross-language code clone detection

• URL: http://arxiv.org/abs/2408.04430v1
• Date: Thu, 8 Aug 2024 12:57:14 GMT
• Title: Large Language Models for cross-language code clone detection
• Authors: Micheline Bénédicte Moumoula, Abdoul Kader Kabore, Jacques Klein, Tegawendé Bissyande,
• Abstract summary: Cross-lingual code clone detection has gained traction with the software engineering community. Inspired by the significant advances in machine learning, this paper revisits cross-lingual code clone detection.
• Score: 3.5202378300682162
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: With the involvement of multiple programming languages in modern software development, cross-lingual code clone detection has gained traction with the software engineering community. Numerous studies have explored this topic, proposing various promising approaches. Inspired by the significant advances in machine learning in recent years, particularly Large Language Models (LLMs), which have demonstrated their ability to tackle various tasks, this paper revisits cross-lingual code clone detection. We investigate the capabilities of four (04) LLMs and eight (08) prompts for the identification of cross-lingual code clones. Additionally, we evaluate a pre-trained embedding model to assess the effectiveness of the generated representations for classifying clone and non-clone pairs. Both studies (based on LLMs and Embedding models) are evaluated using two widely used cross-lingual datasets, XLCoST and CodeNet. Our results show that LLMs can achieve high F1 scores, up to 0.98, for straightforward programming examples (e.g., from XLCoST). However, they not only perform less well on programs associated with complex programming challenges but also do not necessarily understand the meaning of code clones in a cross-lingual setting. We show that embedding models used to represent code fragments from different programming languages in the same representation space enable the training of a basic classifier that outperforms all LLMs by ~2 and ~24 percentage points on the XLCoST and CodeNet datasets, respectively. This finding suggests that, despite the apparent capabilities of LLMs, embeddings provided by embedding models offer suitable representations to achieve state-of-the-art performance in cross-lingual code clone detection.

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