[Bug c++/77430] New: warn about redundant assignments

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77430

            Bug ID: 77430
           Summary: warn about redundant assignments
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: manu at gcc dot gnu.org
  Target Milestone: ---

Simple testcase:

int foo(int a)
{
    a = 0;
    a = 0; /* missing warning */
    return a;
}

More complex cases present in GCC:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77421#c5