------- Comment #7 from hjl dot tools at gmail dot com 2009-02-10 21:02 ------- (In reply to comment #6) > This would mean -Os vs. -O2 gives different __alignof__(long long) values, I > think that's a bad idea. I think a new option to disable dynamic realignment > or at least do that if estimated stack size is <= 64 bits would be better. >
We do stack alignment to satisfy variable alignment requirement. You don't want to disable it blindly. The proper way to avoid stack alignment is to tell compiler not to align variable on stack. We can add a new option, -malign-double=4, to align DI/DF to 4 bytes on stack. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39137
