In most cases yes, but inherently no. Understand that compilers, as part of their optimization step, might compile high level code into something that you can't really connect with the actual code. Part of the information is lost in the optimization step and so in a general case you will not be able to revert the compilation step. At least not fully, of course you will be able to get something resembling the solution, but it is not guaranteed to be the exact code that compiled into your starting input.

This is, of course, after taking into consideration you will not be able to recover dead source code if it's never compiled into something. Because if you take this into account, even if a language does not optimize the source code otherwise, if it only discards dead code: you are also losing information.

And also, this is disregarding name mangling. Obviously name mangling can be done in a way you have information loss, but this is probably irrelevant since concrete entity names are not that relevant.