[Bug c++/98750] New: does not detect dead code

[tiagomacarios at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98750

            Bug ID: 98750
           Summary: does not detect dead code
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tiagomacarios at gmail dot com
  Target Milestone: ---

for the following code gcc will not detect that f() is never called. msvc
detects this correctly.

https://godbolt.org/z/Y5n78v
```
void f();

void _(int num) {
    switch (num)
    {
        case 1:
            break;
            f();
    }
}
```