[Bug c++/67866] False positive -Wshift-count-overflow on template code that checks for shift count overflow

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67866

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-10-06
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The warning occurs in the "dead" code region.  Not sure, but maybe template
substitution can mark "obviously" dead regions with TREE_NO_WARNING?  This
is an issue for other warnings as well.