[Bug rtl-optimization/63191] [4.8/4.9/5 Regression] 32-bit gcc uses excessive memory during dead store elimination with -fPIC

[steven at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63191

--- Comment #6 from Steven Bosscher <steven at gcc dot gnu.org> ---
(In reply to woodfin from comment #5)
> You could try adding a non-static function that returns an address inside Zs.
> 
> const Z* getzs() {
>   return &Zs[0];
> }

Yes, that does the trick:
  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND
25244 stevenb   20   0 5964m 5.8g  30m R   100  9.3  25:03.60 cc1plus
(and counting)

Now let's see if I can come up with a more reasonable test case...