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[Bug rtl-optimization/49936] [4.7 Regression] IRA handles CANNOT_CHANGE_MODE_CLASS poorly, + spills to memory on 4.7
- From: "sandra at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 05 Jan 2012 17:31:39 +0000
- Subject: [Bug rtl-optimization/49936] [4.7 Regression] IRA handles CANNOT_CHANGE_MODE_CLASS poorly, + spills to memory on 4.7
- Auto-submitted: auto-generated
- References: <bug-49936-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49936
--- Comment #10 from Sandra Loosemore <sandra at codesourcery dot com> 2012-01-05 17:31:39 UTC ---
My notes are that the unnecessary register moves in the loop have been present
since at least GCC 4.3, so it is not a 4.6->4.7 regression, at least.