[Bug tree-optimization/76490] [5/6/7 Regression] when use -O2 -fcheck-founds compiler appears to hang and consumes all memory

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76490

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-08-14
      Known to work|                            |4.9.4
            Summary|when use -O2 -fcheck-founds |[5/6/7 Regression] when use
                   |compiler appears to hang    |-O2 -fcheck-founds compiler
                   |and consumes all memory     |appears to hang and
                   |                            |consumes all memory
     Ever confirmed|0                           |1
      Known to fail|                            |5.4.0, 6.1.0, 7.0

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed with '-O1 -fcheck=bounds -ftree-vrp' from 5.4.0 up to trunk (7.0).
The test compiles with '-O2 -fcheck=bounds -fno-tree-vrp'.

The change occurred between revisions r226476 (2015-08-02, compiles) and
r227016 (2015-08-19, hangs).