https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63155
--- Comment #55 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Rogério de Souza Moraes from comment #53) > Created attachment 46627 [details] > New testcase that shows performance degradation in GCC 9.1 > > This new testcase that shows performance degradation in GCC 9.1, the > performance gets worst as we use a newer GCC version to build it. > > Example how to compile: > > gcc -ftime-report -m32 -w -c -O3 -pedantic -fwrapv -mstackrealign > -mpreferred-stack-boundary=4 testcase-v1.c -o testcase-v1.o Let's open a new bugreport for this testcase, it looks different enough to warrant this. I notice you use -O3 which might explain the larger tree SSA rewrite time. PR91257.
