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[Bug middle-end/38584] [4.3/4.4 Regression] Inline heuristics run even at -O0
- From: "stevenb dot gcc at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 1 Jan 2009 13:42:26 -0000
- Subject: [Bug middle-end/38584] [4.3/4.4 Regression] Inline heuristics run even at -O0
- References: <bug-38584-6642@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from stevenb dot gcc at gmail dot com 2009-01-01 13:42 -------
Subject: Re: [4.3/4.4 Regression] Inline heuristics run even at -O0
Note that the compile time at, say, -O1 for 4.3 vs. 4.4 is also a huge
difference for the test case (4.4 much slower, in part due to the
expensive heuristic). Therefore, IMHO, this is still a 4.4 regression
too. We should not be running such expensive algorithms just for
inline heuristics. We need to figure out a cheaper heuristic.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38584