[Bug c++/38486] New: Missing warning about type punning

[dominik dot strasser at onespin-solutions dot com]

When compiling the attached source code with -Wall -O3 -UWARN, no warning on
type punning is printed.
If I compile with -Wall -O3 -DWARN, a warning is printed.
ff.C:31: warning: dereferencing type-punned pointer will break strict-aliasing
rules

While in the attached example, everything seems to work fine, my application
crashes.

Would it be feasible to print the warning also for the nested function calls ?


-- 
           Summary: Missing warning about type punning
           Product: gcc
           Version: 4.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dominik dot strasser at onespin-solutions dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38486