[Bug c/12245] [7/8/9 regression] Uses lots of memory when compiling large initialized arrays

[fche at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=12245

Frank Ch. Eigler <fche at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |fche at redhat dot com

--- Comment #66 from Frank Ch. Eigler <fche at redhat dot com> ---
Just in case it helps, we are encountering this problem with fedora29's gcc
8.2.1,
when compiling a 24-million unsigned-char initialized array:

% gcc -c -Q -v foo.i
[...]

Time variable                                   usr           sys          wall
              GGC
 phase setup                        :   0.00 (  0%)   0.00 (  0%)   0.00 (  0%)
   1243 kB (  0%)
 phase parsing                      :  25.26 ( 83%)  26.12 (100%)  51.47 ( 90%)
2592523 kB (100%)
 phase opt and generate             :   5.32 ( 17%)   0.08 (  0%)   5.42 ( 10%)
      7 kB (  0%)
 phase finalize                     :   0.00 (  0%)   0.02 (  0%)   0.13 (  0%)
      0 kB (  0%)
 garbage collection                 :   1.27 (  4%)   0.00 (  0%)   1.27 (  2%)
      0 kB (  0%)
 callgraph construction             :   4.05 ( 13%)   0.08 (  0%)   4.15 (  7%)
      5 kB (  0%)
 preprocessing                      :   5.99 ( 20%)   6.39 ( 24%)  12.20 ( 21%)
 524289 kB ( 20%)
 lexical analysis                   :   7.34 ( 24%)   8.90 ( 34%)  16.18 ( 28%)
      0 kB (  0%)
 parser (global)                    :  11.93 ( 39%)  10.83 ( 41%)  23.09 ( 40%)
2068233 kB ( 80%)
 TOTAL                              :  30.58         26.24         57.05       
2593783 kB