[Bug optimization/12655] [tree-ssa] Excessive memory usage---32-bit virtual memory exhausted

[amacleod at redhat dot com]

------- 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