http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59868
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2014-01-20 Ever confirmed|0 |1 --- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- With plain -O1 we also get alias stmt walking : 14.78 (19%) usr 0.10 ( 6%) sys 14.90 (19%) wall 0 kB ( 0%) ggc tree SSA incremental : 31.81 (41%) usr 0.01 ( 1%) sys 31.82 (40%) wall 6645 kB ( 1%) ggc ick. Similar to old KDE testcases with a very big initializer function. Here it is 30000 lines gli_init_gl_entrypoint_descs (I suppose auto-generated). >From a quick look it's a single gigantic basic-block doing a sequence of global stores.