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[Bug rtl-optimization/18942] [4.0 Regression] Do loop is not as optimizationed as 3.3.2
- From: "dje at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 12 Dec 2004 19:00:43 -0000
- Subject: [Bug rtl-optimization/18942] [4.0 Regression] Do loop is not as optimizationed as 3.3.2
- References: <20041212052945.18942.pinskia@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From dje at gcc dot gnu dot org 2004-12-12 19:00 -------
The new doloop generator is being more conservative for the signed int
argument and induction variable. Unsigned int produces better code. Maybe
the new algorithm could be more aggressive when one of the -ffast-math sub-
switches is enabled.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18942