SonarCloud reports a new warning here: "_compile" can be NULL on this path:

```
Compile::TracePhase::~TracePhase() {
#ifdef ASSERT
  if (PrintIdealNodeCount) {
    tty->print_cr("phase name='%s' nodes='%d' live='%d' live_graph_walk='%d'",
                  _phase_name, _compile->unique(), _compile->live_nodes(), _compile->count_live_nodes_by_graph_walk());
  }
```

I think it is a regression since JDK-8311976.

This is minor, would only manifest in debug builds, but would be good to fix anyway.