turbo

5fc75a38 - Skip unreachable code when early return can be statically analysed (#8890)

Skip unreachable code when early return can be statically analysed (#8890) ### Description * tracks early returns and their conditions * replaces unreachable code with `"TURBOPACK unreachable"` * finds hoisted declarations in unreachable code and keeps them ### Testing Instructions <!-- Give a quick description of steps to test your changes. -->