Hi Richard,
I have just noticed that the new -fsched-pressure-algorithm= gcc
command line option is not documented in gcc/doc/invoke.texi. Was
this an oversight ?
No, it was deliberate. It's not supposed to be a user-level option.
Then why is there a user-visible command line option ?
Also - why shouldn't it be a user-level option ? In my experience gcc's
instruction scheduling tends to be very sensitive to the algorithm being
compiled. For some applications it does a good job, but for others it
actually makes the performance worth. Being able to tune the behaviour
of the scheduler (via the various -fsched-... options) has been very
helpful in getting good benchmark results.
Cheers
Nick
