Command Line Options -------------------- The command line options to generate the required dumps are: a. for parallelization : -fdump-tree-parloops -ftree-parallelize-loops=n -O2 where n is the number of threads you wish to create b. for vectorization : -fdump-tree-vect -ftree-vectorize -msse4 -O2 The dump file for parallelization is "*.parloops", and for vectorization is "*.vect". For a more verbose dump, use -fdump-tree-vect-all and -fdump-tree-parloops-all