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[Bug rtl-optimization/33928] [4.3/4.4/4.5 Regression] 30% performance slowdown in floating-point code caused by r118475
- From: "bonzini at gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 May 2009 16:37:55 -0000
- Subject: [Bug rtl-optimization/33928] [4.3/4.4/4.5 Regression] 30% performance slowdown in floating-point code caused by r118475
- References: <bug-33928-271@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #76 from bonzini at gnu dot org 2009-05-07 16:37 -------
It should be possible to modify fwprop to avoid excessive memory usage (doing
its own dataflow, basically, instead of using UD chains)
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928