[Bug tree-optimization/15880] New: No 'may be used uninitialize' warning for arrays.

[bangerth at dealii dot org]

While we get a 'may be used uninitialized' warning for this case: 
-------------  
struct X { int a; };  
  
int f() {  
  X x;  
  return x.a;  
}  
-------------  
g/x> /home/bangerth/bin/gcc-3.5-pre/bin/c++ -c x.cc -O2 -Wuninitialized  
x.cc: In function `int f()':  
x.cc:5: warning: 'x$a' is used uninitialized in this function  
  
we do not for this case: 
--------------- 
int f() { 
  int x[3]; 
  return x[0]; 
} 
--------------- 
g/x> /home/bangerth/bin/gcc-3.5-pre/bin/c++ -c x.cc -O2 -Wuninitialized 
 
Does this have a reason or is it a bug? I tend to think it is the latter. 
 
W.

-- 
           Summary: No 'may be used uninitialize' warning for arrays.
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bangerth at dealii dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15880