[Bug rtl-optimization/68173] gcc does not terminate with -O0 on source file with a very large expression

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68173

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ra
                 CC|                            |vmakarov at gcc dot gnu.org
          Component|c                           |rtl-optimization

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, peak memory occurs during RA (as expected, DF ...).

p x_rtl.emit.x_reg_rtx_no
$3 = 5328459

that's a lot of pseudos (at -O0 probably still all used).  The BB is also
very large thus peak occurs within BB-local DF routines like
df_lr_bb_local_compute (which also end up very slow).

The suggested patch has no effect on the above number.