[Bug c/24611] New: -Wunused-value Extension

[alexander_herrmann at yahoo dot com dot au]

As a enhancement to the -Wunused-value which may allready detected by the
data-flow analysis.
int problem_funktion(int a)
{
   int b = 0; // This should cause a warning as the value 0 is never used
   if (__builtin_expect(((a > 0) && ((b = 5) != 0)), 1))
   {
      return(a*b);
   }
   return(a);
} 
Compiling with -Wunused-value imo it should give me a warning about assigning a
unused value to b.


-- 
           Summary: -Wunused-value Extension
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: alexander_herrmann at yahoo dot com dot au


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24611