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
