[Bug middle-end/54052] [11/12/13/14 Regression] g++ takes excessive time in opt and generate phase; can lead to Segmentation Fault when not enough memory available

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54052

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, PR98863 was the last one triggering place_phis rewrite but I'm not sure
what actual testcase Richard used.  There's plenty of SPEC testers so the
original reported WRF case will show up again.

Unpatched on the same machine as last comment:

 forward prop                       :1359.71 ( 96%)
 combiner                           :  29.95 (  2%)
 TOTAL                              :1420.22          0.98       1421.51       
  596M
1420.22user 1.02system 23:41.57elapsed 99%CPU (0avgtext+0avgdata
1209924maxresident)k
0inputs+25096outputs (0major+355965minor)pagefaults 0swaps

interestingly peak memory usage is almost unchanged.