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[Bug tree-optimization/60577] [4.7/4.8/4.9 Regression] inefficient FDO instrumentation code
- 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, 19 Mar 2014 12:36:24 +0000
- Subject: [Bug tree-optimization/60577] [4.7/4.8/4.9 Regression] inefficient FDO instrumentation code
- Auto-submitted: auto-generated
- References: <bug-60577-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60577
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 32393
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32393&action=edit
hack
Like this (hack alert). Applies store motion one level for a restricted set
of loops. Requires us to add preheaders and record exits (and disambiguate
multiple latches) and compute dominators.