https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61515
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> --- Created attachment 32952 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32952&action=edit stripped down testcase Stripped down, now it starts to fall off a bit: tree SSA incremental : 1.48 ( 7%) usr 0.42 (33%) sys 1.96 ( 8%) wall 1882 kB ( 1%) ggc dominator optimization : 10.57 (50%) usr 0.03 ( 2%) sys 12.44 (48%) wall 6918 kB ( 4%) ggc TOTAL : 21.12 1.27 25.67 191269 kB (just cutting in half three times from the bottom and appending } until it compiles again)