*
* The algorithm works by playing this little shell game with the values.
* We start by recording where every source value is and which source value
- * each destination value should recieve. We then grab any copy whose
+ * each destination value should receive. We then grab any copy whose
* destination is "empty", i.e. not used as a source, and do the following:
* - Find where its source value currently lives
* - Emit the move instruction