As the call chain is parsed from the trace file, a connectivity matrix is built that identifies which functions call which other functions.
在分析跟踪文件中的调用链时，会构建一个连通矩阵，用来表示哪个函数调用了其他哪些函数。
2
In the former case, the first dot file found in the precedent chain is definitive.
在第一种情况下，优先链中第一个点文件的优先权是不容置疑的。
3
This way, if a cache file is removed at any step of the transformation chain, it has the effect of invalidating all dependent Butterfly cache files, forcing their recreation.