https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112374
--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> --- This one starts to differ during RTL expansion, -fdump-tree-optimized differs only with addition of DEBUG stmts, but expand dump already has: -(insn 1007 1006 1008 (parallel [ +(insn 1007 8 1008 (parallel [ (set (reg:DI 106) (plus:DI (reg/f:DI 93 virtual-stack-vars) - (const_int -32 [0xffffffffffffffe0]))) + (const_int -4 [0xfffffffffffffffc]))) (clobber (reg:CC 17 flags)) ]) "pr112374.C":11:14 -1 (nil))