On Mon, Aug 11, 2014 at 1:58 PM, Steve Ellcey <sell...@mips.com> wrote: > I have a basic question about optimization selection in GCC. There used to > be some code in GCC (passes.c?) that would set various optimize pass flags > depending on if the 'optimize' flag was > 0, > 1, or > 2; later I think > there may have been a table. This code seems gone now and I can't figure > out how GCC is selecting what optimization passes to run at what optimization > levels (-O1 vs. -O2 vs. -O3). How is this handled in the top-of-tree GCC > code? > > I see passes.def but there doesn't seem to be anything in there to tie > specific passes to specific optimization levels. Likewise in common.opt > I see flags for various optimization passes but nothing to tie them to > -O1 or -O2, etc. > > I'm probably missing something obvious, but a pointer would be much > appreciated.
default_options_table in opts.c. Thanks, Andrew > > Steve Ellcey
