LLVMTA: An LLVM-Based WCET Analysis Tool

Authors Sebastian Hahn , Michael Jacobs, Nils Hölscher , Kuan-Hsun Chen , Jian-Jia Chen , Jan Reineke

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Author Details

Sebastian Hahn
  • Saarland University, Saarland Informatics Campus, Saarbrücken, Germany
Michael Jacobs
  • Saarland University, Saarland Informatics Campus, Saarbrücken, Germany
Nils Hölscher
  • TU Dortmund University, Germany
Kuan-Hsun Chen
  • University of Twente, The Netherlands
Jian-Jia Chen
  • TU Dortmund University, Germany
Jan Reineke
  • Saarland University, Saarland Informatics Campus, Saarbrücken, Germany


We would like to thank all the students at Saarland University who contributed during the development of llvmta: in particular Claus Faymonville for his extensive contributions in a very early development stage, but also Tina Jung, Darshit Shah, and Tobias Stark.

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Sebastian Hahn, Michael Jacobs, Nils Hölscher, Kuan-Hsun Chen, Jian-Jia Chen, and Jan Reineke. LLVMTA: An LLVM-Based WCET Analysis Tool. In 20th International Workshop on Worst-Case Execution Time Analysis (WCET 2022). Open Access Series in Informatics (OASIcs), Volume 103, pp. 2:1-2:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)


We present llvmta, an academic WCET analysis tool based on the LLVM compiler infrastructure. It aims to enable the evaluation of novel WCET analysis approaches in a state-of-the-art analysis framework without dealing with the complexity of modeling real-world hardware architectures. We discuss the main design decisions and interfaces that allow to implement new analysis approaches. Finally, we highlight various existing research projects whose evaluation has been enabled by llvmta.

Subject Classification

ACM Subject Classification
  • Software and its engineering → Software performance
  • Software and its engineering → Automated static analysis
  • Software and its engineering → Compilers
  • Computer systems organization → Real-time system architecture
  • WCET analysis
  • low-level analysis
  • LLVM


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