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[Bug optimization/12655] [tree-ssa] Excessive memory usage---32-bit virtual memory exhausted
- From: "amacleod at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 18 Nov 2003 15:45:13 -0000
- Subject: [Bug optimization/12655] [tree-ssa] Excessive memory usage---32-bit virtual memory exhausted
- References: <20031017032825.12655.lucier@math.purdue.edu>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From amacleod at redhat dot com 2003-11-18 15:45 -------
My compile times indicate that for mainline it takes 930 seconds to compile with
-O2.
Tree-ssa with -fno-tree-pre compiles it in 73 seconds.
with PRE, it compiles in 165 seconds now.
So PRE is definately better than it was, and both are WAY better than mainline :-).
Mainline is spending over 80% of its time in regstack...
-fno-tree-pre can compile it in 107 seconds at -O3
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12655