`LocationDescription` contains both the insertion point and the debug
location. When `LocationDescription` is available, it is better to use
`updateToLocation` which will update both. This PR replaces
`restoreIP(Loc.IP)` with `updateToLocation(Loc)` as former may not
update debug location in all cases.
I am not checking the return value of `updateToLocation` because that is
checked just a few lines above in all cases and we would have returned
early if it failed.