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[Bug rtl-optimization/33922] [4.3 Regression] slow compilation on ia64 (postreload scheduling)
- From: "jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 28 Oct 2007 19:10:48 -0000
- Subject: [Bug rtl-optimization/33922] [4.3 Regression] slow compilation on ia64 (postreload scheduling)
- References: <bug-33922-12387@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #15 from jakub at gcc dot gnu dot org 2007-10-28 19:10 -------
Compared to 20070803 with -O3 -fno-tree-vectorize there are now 100 times more
calls to rtx_needs_barrier and 44 times more calls to
safe_group_barrier_needed.
E.g. the latter is horribly expensive, e.g. copying around 401 * sizeof (struct
reg_write_state) == 1604 bytes several times.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33922