https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80960
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> --- Without --param max-combine-insns=2 alias stmt walking : 10.98 ( 7%) usr 0.13 (12%) sys 11.14 ( 7%) wall 3 kB ( 0%) ggc dead store elim2 : 9.57 ( 6%) usr 0.00 ( 0%) sys 9.57 ( 6%) wall 1828350 kB (39%) ggc combiner : 112.26 (68%) usr 0.51 (49%) sys 112.81 (68%) wall 2708049 kB (57%) ggc integrated RA : 7.98 ( 5%) usr 0.03 ( 3%) sys 8.00 ( 5%) wall 34845 kB ( 1%) ggc LRA hard reg assignment : 14.58 ( 9%) usr 0.06 ( 6%) sys 14.65 ( 9%) wall 0 kB ( 0%) ggc TOTAL : 165.76 1.05 166.87 4733927 kB