[Bug middle-end/60591] New: Report enum conversions as part of Wconversion

[pmatos at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60591

            Bug ID: 60591
           Summary: Report enum conversions as part of Wconversion
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pmatos at gcc dot gnu.org

enum xpto
{
  A = 0,
  B = 1,
  X = 512
};
extern void print (unsigned int);

unsigned char bar (enum xpto a)
{
   return a;
}


We don't get currently a warning for this return conversion if we use
--short-enums. With -O2 --short-enums, sizeof enum xpto == 2, but sizeof
unsigned char == 1, therefore we should warn the user there's loss of
precision.