[Bug c/103180] New: casting char * to any type did not report the warning message

[jie.luo--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103180

            Bug ID: 103180
           Summary: casting char * to any type did not report the warning
                    message
           Product: gcc
           Version: 9.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jie....@compiler-dev.com
  Target Milestone: ---

When using gcc-9.3.0 to compile the test case with -fstrict-aliasing
-Wstrict-aliasing=1,gcc did not report the strict aliasing violation warning
message.
The test case is as follows: 

char aa[100];
int *ptr;
int main()
{
        ptr = (int *) aa;
        return ptr[0];
}