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[Bug tree-optimization/17549] [4.0 Regression] 10% increase in codesize with C code compared to GCC 3.3
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Feb 2005 09:08:41 -0000
- Subject: [Bug tree-optimization/17549] [4.0 Regression] 10% increase in codesize with C code compared to GCC 3.3
- References: <20040918113641.17549.miguel55angel@hotmail.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From steven at gcc dot gnu dot org 2005-02-10 09:08 -------
The slowdown is probably some unfortunate icache effect - ccould be anything
from alignment, the slightly larger instructions due to using r8 instead of
rcx. I guess we should not care too much about such random effects that we
cannot do anything about anyway. I'm going to see if it doesn't hurt on i686,
and submit the patch if things look good.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17549