https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118409
--- Comment #10 from Sam James <sjames at gcc dot gnu.org> --- Created attachment 60106 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60106&action=edit tc-i386.c Reducing more, but here's a standalone testcase. $ gcc tc-i386.c -o tc-i386 -O1 && ./tc-i386 got ret=0 Aborted (core dumped) ./tc-i386 $ gcc tc-i386.c -o tc-i386 -O1 -fdisable-tree-ifcombine && ./tc-i386 cc1: note: disable pass tree-ifcombine for functions in the range of [0, 4294967295] got ret=1