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[Bug tree-optimization/72712] [7 Regression] Tenfold compile time regression
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 28 Sep 2016 13:48:41 +0000
- Subject: [Bug tree-optimization/72712] [7 Regression] Tenfold compile time regression
- Auto-submitted: auto-generated
- References: <bug-72712-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72712
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Now that we have another (early) pass things should be even worse. Current
trunk at -O2 with -fno-checking improved though (I guess by means of a cost
model or so):
phase opt and generate : 69.39 (99%) usr 0.98 (98%) sys 72.38 (99%) wall
289872 kB (97%) ggc
tree SSA incremental : 16.94 (24%) usr 0.00 ( 0%) sys 17.36 (24%) wall
13582 kB ( 5%) ggc
backwards jump threading: 5.04 ( 7%) usr 0.00 ( 0%) sys 5.20 ( 7%) wall
115843 kB (39%) ggc
PRE : 18.37 (26%) usr 0.25 (25%) sys 19.13 (26%) wall
270 kB ( 0%) ggc