Richard Biener <richard.guent...@gmail.com> 于2023年9月25日周一 13:46写道： > > > > > Am 25.09.2023 um 04:53 schrieb Hanke Zhang via Gcc <gcc@gcc.gnu.org>: > > > > Hi, I have recently been working on loops in gcc, and I have some > > questions about the loop traversal. > > > > I use loops_list(cfun, LI_ONLY_INNERMOST) to traverse the loops in my > > pass to obtain the loop. > > > > I found that the order of traversal and the order of actual > > instruction execution will be different. > > > > Sometimes it's the exact opposite, and sometimes it's sequential. I > > would like to ask how to predict its behavior? And what method should > > I use if I want to obtain sequential traversal? > > The order of loops is according to their index, if you require traversal in > program order you have to order them yourself, for example by sorting them > after their header program order. > > Richard >
Thanks. Get it! > > Thanks. > > Hanke Zhang.
