compiler: handle unsafe conversion expression in escape analysis

Change-Id: I92133973bce0f8c7d4c427c1a04028a33c8a9c30
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/192037
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
1 file changed