https://github.com/epiqc/ScaffCC
Tip revision: be5bfe685a7b7268af2ae0344c2ffe444e77f296 authored by ah744 on 20 August 2016, 18:31:59 UTC
Small script changes
Small script changes
Tip revision: be5bfe6
chapter-expand.tex
\chapter{Expanding ScaffCC}\label{ch:expand}
ScaffCC is completely open-source and may be expanded to accomodate future needs of quantum circuit analysis and optimization.
At the core of ScaffCC are the LLVM compiler passes, which operate on LLVM IR (.ll) code. All LLVM passes are stored in:
\begin{lstlisting}
llvm/lib/Transforms/
\end{lstlisting}
Passes specific to ScaffCC are stored in:
\begin{lstlisting}
llvm/lib/Transforms/Scaffold
\end{lstlisting}
In general, to run a pass in LLVM, you invoke the opt program as follows:
\begin{lstlisting}
build/Release+Asserts/bin/opt -S -load build/Release+Asserts/lib/Scaffold.so {pass_name} {input_ll_file} > {output_ll_file} 2> {log_file}
\end{lstlisting}
Note that ${pass\_name}$ referes to the unique name of the pass by which it is registered in the LLVM system, by invoking the following in the implementation of the pass:
\begin{lstlisting}
static RegisterPass<{pass_name}> X({pass_name}, {description_of_functionality});
\end{lstlisting}
To write a new pass, start by looking at the previously implemented examples in this directory, and consulting the LLVM Documentation:
\url{http://llvm.org/docs/WritingAnLLVMPass.html}