Enable SIL parsing and SIL serialization of semantics.
We add one more field to SILFunctionLayout for semantics. We should refactor
handling of attributes at SIL level, right now they are in SILFunction as bool
or std::string and in SIL serializer as a 1-bit field or an ID field.
rdar://17525564
Swift SVN r19434
info for them and generally clean up the inline scope handling a bit.
Fix the debug scope handling for all clients of SILCloner, especially
the SIL-level spezializers and inliners.
This also adds a ton of additional assertions that will ensure that
future optimization passes won't mess with the debug info in a way that
could confuse the LLVM backend.
Swift SVN r18984
The way this pass works is very similar to generic specialization except
that it turns the old function into a thunk that calls the newly created
function that has had the dead arguments removed.
This ensures that any place in the code where we were unable to see that
the old function was being called still works and also enables us to
cut down on code size increase due to code duplication since the
marshalling code for the thunk should be very small.
This is just the first part of a larger body of work that optimizes
function signatures. The plan is to include transforming loadable
pointer args to pass by value and to convert @owned arguments to
@gauranteed arguments.
<rdar://problem/17319928>
Swift SVN r18970
