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[Bug tree-optimization/16656] New: [lno] huge amounts of time spent in find_best_candidate
- From: "falk at debian dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 21 Jul 2004 11:39:14 -0000
- Subject: [Bug tree-optimization/16656] New: [lno] huge amounts of time spent in find_best_candidate
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
3.5-tree-ssa-lno 20040719 (merged 20040718)
The attached 297k c++ source takes at least 90 minutes to compile on my system
at -O, apparently it triggers an infinite loop or at least really bad worst case
time complexity. g++ 3.5.0 20040627 takes "only" about two minutes at -O.
According to oprofile, 99.9403% of the time is spent in find_best_candidate.
--
Summary: [lno] huge amounts of time spent in find_best_candidate
Product: gcc
Version: lno
Status: UNCONFIRMED
Keywords: compile-time-hog
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: falk at debian dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: alphaev68-unknown-linux-gnu
GCC host triplet: alphaev68-unknown-linux-gnu
GCC target triplet: alphaev68-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16656