Commit 9525cbe1 authored by Jayke Meijer's avatar Jayke Meijer

Restored algebraic transformations.

parent cbd31150
......@@ -168,12 +168,18 @@ removed by the dead code elimination.
\subsubsection*{Algebraic transformations}
Some expression can easily be replaced with more simple once if you look at
what they are saying algebraically. An example is the statement $x = y + 0$, or
in Assembly \texttt{addu \$1, \$2, 0}. This can easily be changed into $x = y$
or \texttt{move \$1, \$2}.
Another case is the multiplication with a power of two. This can be done way
more efficiently by shifting left a number of times. An example:
\texttt{mult \$regA, \$regB, 4 -> sll \$regA, \$regB, 2}. We perform this
optimization for any multiplication with a power of two.
<<<<<<< HEAD
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There are a number of such cases, all of which are once again stated in
appendix \ref{opt}.
>>>>>>> fd46a3140a9b8bd0e5e542e57b57bfe87ff7556d
\section{Implementation}
......
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