[Bug tree-optimization/46590] long compile time with -O2 and many loops

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46590

--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2010-11-21 16:59:39 UTC ---
On my laptop the test in comment #1 takes ~4mn to compile and at -O1 I had to
interrupt the compilation after ~20mn during which all the time was spent in
memory pagination!-(with 4Gb of RAM).