[LLVMdev] RFC: Exception Handling Rewrite

[Rafael Ávila de Espíndola]

>    %exn.val = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
>                 catch i8** @_ZTIi, i8** @_ZTId
>                 filter i8** @_ZTIPKc
>    br label %lpad.split

What is the semantics of filter? Is it undefined reference if an 
exception not matching ZTIi, ZTId or ZTIPKc passes by?

Cheers,
Rafael