[Bug middle-end/39326] Segmentation fault with -O1, out of memory with -O2

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39326

--- Comment #53 from Richard Biener <rguenth at gcc dot gnu.org> ---
With the PR59802 and PR38518 fixes on trunk I see for the 2nd testcase at -O2

 PRE                     :  19.23 (35%) usr   0.01 ( 1%) sys  19.22 (34%) wall 
  1421 kB ( 0%) ggc
 combiner                :  13.24 (24%) usr   0.14 (19%) sys  13.37 (24%) wall 
402488 kB (73%) ggc
 integrated RA           :   9.28 (17%) usr   0.35 (47%) sys   9.65 (17%) wall 
 26707 kB ( 5%) ggc
 TOTAL                 :  55.56             0.74            56.34            
550215 kB

compared to the 4.8 branch:

 tree loop invariant motion:  17.29 (22%) usr
 PRE                     :  24.25 (31%) usr
 combiner                :  12.52 (16%) usr   0.14 (17%) sys  12.66 (16%) wall 
402491 kB (74%) ggc
 integrated RA           :   7.96 (10%) usr   0.32 (38%) sys   8.25 (11%) wall 
 26420 kB ( 5%) ggc
 TOTAL                 :  77.53             0.84            78.53            
542544 kB

so it's an improvement (tree LIM is off the radar completely, RTL PRE
is improved a bit - looking at it now).