https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114978
--- Comment #40 from Chen Chen <chz0808 at gmail dot com> --- (In reply to Andrew Pinski from comment #36) > (In reply to Chen Chen from comment #35) > > > > 1. unknown patch committed between 20250105-20250112 on gcc15: works for > > gcc15, possibly also works for gcc14? If yes, can it be backported to gcc14? > > r15-6657-g405c99c17210a5 is most likely canidate as it was explicitly > designed for exchange2_r and it falls directly in your time frame. And I > doubt it can be backported to GCC 14. Thank you very much for your kind help! I just did some tests and confirm that the patch r15-6657 alone would fix the regression issue. See below, tests are made on Debian sid loong64 with loongson 3A6000 CPU: -march=la464 -O3 -flto: 9.20 (Debian sid system default 14.2.0-19) -march=la464 -O3 -flto: 12.4 (14.2.0 source + r15-6657) I saw many other commits at the page: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114074, but they should be not related to this matter. Is it possible to backport r15-6657 alone to gcc14?
