another silly optimisation case
Matthew Kirkwood
weejock@ferret.lmh.ox.ac.uk
Wed Mar 10 10:39:00 GMT 1999
Hi,
egcs RH5.2 (egcs-2.90.27 980315 (egcs-1.0.2 release))
generates different code for these two functions, the
first including a jump even with -O6:
int f(int g) { return g ? 34 : 0; }
int g(int f) { return f && 34; }
I don't suppose (x ? y : 0) is a hugely common construction
but it seems to be another candidate for simple optimisation.
Am I missing something about what the standard says about
these two operators?
Matthew.
More information about the Gcc
mailing list