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[Bug rtl-optimization/19097] [3.4/4.0/4.1 regression] Quadratic behavior with many sets for the same register in gcse CPROP
- 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: 8 Jun 2005 09:38:42 -0000
- Subject: [Bug rtl-optimization/19097] [3.4/4.0/4.1 regression] Quadratic behavior with many sets for the same register in gcse CPROP
- References: <20041221015654.19097.phython@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From steven at gcc dot gnu dot org 2005-06-08 09:38 -------
Can you try and figure out which patch changed this for GCC 4.1? Bonus
points if you can see if backporting that patch gives GCC 4.0 a speed-up,
because in that case you may have something to go to Mark with for the
next GCC 4.0.x (x>1) release ;-)
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19097