I am comparing the performance of the default scheduler (seems to be the one that minimizes register pressure) with no scheduler (-pre-RA-sched=none), and I got these numbers. The ratio is low_reg_pressure/none, that is, the lower the number, the better the performance with low register pressure:
CINT2000/176.gcc/176.gcc n/a // crashed!
CINT2000/252.eon/252.eon n/a // never runs
In three cases, I got a ratio above 1 [Must mean: scheduling had a negative impact on performance.] I just run it once, but I was wondering if this could make sense, or if I am setting the tests wrongly. I am running the nightly test Makefile, in a x86 linux 32 bits machine.