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[Bug tree-optimization/37312] -Os significantly faster than -O2 on test case
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 1 Sep 2008 14:36:14 -0000
- Subject: [Bug tree-optimization/37312] -Os significantly faster than -O2 on test case
- References: <bug-37312-7834@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from rguenth at gcc dot gnu dot org 2008-09-01 14:36 -------
Well, now -Os -funroll-all-loops doesn't do any unrolling anymore while it did
before. With -O2 you get what you ask for - unrolled loops.
-funroll-all-loops isn't really a flag to be used in general.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37312