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\section{Conclusion}
In conclusion, we propose a method to combine existing fuzzing tools and modify their outputs so that they are compatible with HLS tools. We then used this testing framework to run 10,000 test cases through three different HLS tools to find as many bugs in them as possible and report them to the tool vendors. In total, we found at least 6 individual and unique bugs in all the tools, which have been reduced and analysed. These consisted of crashes as well as generation of designs that did not behave in the same way as the original code.
Further work could be done on supporting more HLS tools, especially ones that prove that the output is correct before terminating. This could give an indication on how effective these proofs are, and how many times they cannot prove the output equivalent.
As HLS is becoming increasingly useful, it is important to make sure that these tools are also reliable. We hope that this work further motivates the design of correct HLS tools, either by validating that the output is correct or by proving the HLS tool correct.
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