Re: Forcing the production of unreachable code

[Jeff Law <law at redhat dot com>]

Patrick Moran wrote:
> Hello all,
>    I was wondering if there is some means of directing gcc to generate
> unreachable code?  Either a means to do so globally or a specific
> scope would be great.  I wish to generate some code which employs
> inline assembly and/or libunwind to do a type of exception handling
> not possible in standard C.
>
>    Don't get me wrong - the compiler is correct. The generated code is
> unreachable via any standard C control flow mechanism, but I'd really
> like it to generate the code anyways.  Is there any way to do this?
>   
Put a label before the block of code, then take the address of the label 
and pass it to a function defined in another compilation unit?   That 
should make the compiler think the code in question is reachable and 
thus prevent it from being deleted.

jeff