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@@ -22,6 +22,19 @@ int result() { \caption{Miscompilation bug found in Vivado 2018.3 and 2019.2 which returns \texttt{6535FF} instead of \texttt{46535FF} which is the correct result.}\label{fig:vivado_bug1} \end{figure} +\NR{ +Notes on program: +\begin{itemize} + \item result is main + \item array a needs to be at least 6 elements + \item magic number as well + \item for loop at least two. + \item constant replacement fixes it too. + \item all three versions of Vivado. + \item +\end{itemize} +} + We have tested three widely used HLS tools: LegUp~\cite{canis13_legup}, Xilinx Vivado HLS~\cite{xilinx20_vivad_high_synth}, and the Intel HLS Compiler~\cite{?}. For all three tools, we were able to find valid C programs that cause crashes while compiling and valid C programs that cause wrong RTL to be generated. We have submitted a total of \ref{?} bug reports to the developers, \ref{?} of which have been confirmed and \ref{?} of which have now been fixed at the time of writing. We hope that our work serves to stimulate efforts to improve the quality of HLS tools. |