On Sun, Oct 21, 2012 at 11:47 PM, vikram1729 <vsp1729@xxxxxxxxx> wrote: > Dear Sir, > I want to understand the phase-ordering problem in compilers. My basic > doubt is what is the difference between the pass and phase in compilers? There is no significant difference. One might think of a phase a group of passes. Still, it would be reasonable to describe the phase-ordering problem as a pass-ordering problem. > How the user can handle/alter phase-ordering in GCC? You can edit the source code (gcc/passes.c) or you could write a plugin but there is no way to change the ordering from the command line. > Will there be any impact of repeating optimization options or reordering the > optimization options in GCC? Yes. Ian
