https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103465
--- Comment #27 from Tomas Kalibera <tomas.kalibera at gmail dot com> --- > > should do the job. Tomas, can you give it a try? > > Thanks, so far I tried it only on predict-22.c and it works (with a fixed > comma as below), enables the optimization. I will do more testing tomorrow. I've tested with gcc12 (6aa0859afaf28f4fb13121352225bc5877e02a44) gcc11 (a03aae8d9f5dbfe3ca3dbfe7eadc6bbe6fbbe1bc) gcc10 (48e0da239f65b7cfa0e6f51f266c2e04f5ad9bbd) I confirm that with the patch applied: * the original bug report about invalid note about '-freorder-blocks-and-partition' is fixed * the optimization is applied by default at -O3, -O2 and can be enabled at -O1 via -f * the optimization can be disabled via -fno- and via pragma * -Q --help=optimizers issue for the option goes away, so "fixed" (though as I understand from Martin other optimizations still disabled by target will incorrectly appear as enabled) So with this patch applied, I am happy for this bug report to be closed. Thanks to both of you.