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[Bug target/11180] [avr-gcc] Optimization decrease performance of struct assignment.
- From: "dmixm at marine dot febras dot ru" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 9 Sep 2007 21:59:02 -0000
- Subject: [Bug target/11180] [avr-gcc] Optimization decrease performance of struct assignment.
- References: <bug-11180-6291@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #12 from dmixm at marine dot febras dot ru 2007-09-09 21:59 -------
Andy Hutchinson wrote (comment #6) that addition a 'movdi' instruction improves
the result. I have try to add a very simple 'movdi' (which split into 2 SImode
instuctions). In result:
-O0 --> 85 words,
-O1,2,3,s --> 50 words.
Version is 4.2.1
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11180