[Bug c++/52955] New: Missing warning on wrong sizeof usage

[xinliangli at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52955

             Bug #: 52955
           Summary: Missing warning on wrong sizeof usage
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: xinliangli@gmail.com


Example:


 #include <memory.h>
 struct S { int a, b, c; float vec[16]; };
 void test(S *s) {
  // ...
  memset(s, 0, sizeof(s));
  // ...
 }

 /*

memset.cpp:5:23: warning: argument to 'sizeof' in 'memset' call is the
same expression as the destination; did you mean to dereference it? [-
Wsizeof-pointer-memaccess]
 memset(s, 0, sizeof(s));
        ~            ^
1 warning generated.

*/