[..]
There is no need for much detail, just compile any bigger
sourcecode with
-O3 -fno-.. and after that with -O2 .... When the object files are
not
identical, something is wrong and I can start a bug report.
how much is size diffrent ?
You use
-finline-functions -fpredictive-commoning -fgcse-after-reload
-ftree-vectorize
right ?
I see in Gcc source that there is more set on -O3.
flag_ipa_cp_clone = opt3;
if (flag_ipa_cp_clone)
flag_ipa_cp = 1;
.but i
think you can easy test, compile the ffmpeg, if it give no internal
compiler error with -fno........ then it work.
here is from source opt.c what is set on opt3
opt3 = (optimize >= 3);
flag_predictive_commoning = opt3;
flag_inline_functions = opt3;
flag_unswitch_loops = opt3;
flag_gcse_after_reload = opt3;
flag_tree_vectorize = opt3;
flag_ipa_cp_clone = opt3;
if (flag_ipa_cp_clone)
flag_ipa_cp = 1;