[Bug c/56113] out of memory when compiling a function with many goto labels (50k > )

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56113

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ian at gcc dot gnu.org

--- Comment #35 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #34)
> GCC 8 takes 400MB and 11s at -O1 for 6000 and 3.5GB and 899ss for 60000
> where it first runs into the mentioned C parser issue (update_label_decls).
> 
> Time variable                                   usr           sys         
> wall               GGC
>  phase parsing                      : 733.99 ( 82%)   5.93 ( 60%) 739.94 (
> 81%)  273812 kB ( 10%)
>  phase opt and generate             : 165.08 ( 18%)   3.98 ( 40%) 169.07 (
> 19%) 2576743 kB ( 90%)
>  parser function body               : 726.43 ( 81%)   5.44 ( 55%) 732.53 (
> 81%)  191868 kB (  7%)
>  alias stmt walking                 :  17.95 (  2%)   1.12 ( 11%)  19.28 ( 
> 2%)    1875 kB (  0%)
>  tree PTA                           :  14.61 (  2%)   0.10 (  1%)  14.73 ( 
> 2%)    4219 kB (  0%)
>  TOTAL                              : 899.07          9.94        909.03    
> 2851811 kB
> 899.07user 10.04system 15:09.13elapsed 99%CPU (0avgtext+0avgdata
> 3579512maxresident)k
> 0inputs+39984outputs (0major+1276027minor)pagefaults 0swaps
> 
> Re-categorizing.

Ian and Joseph are the ones doing the implementation (which is just
for a diagnostic btw).