Currently when function types like `(_: Int...) -> Void` are mangled
their names are going to include enclosing sugar BoundGenericType(Array),
which is not necessary and doesn’t play well with `AnyFunctionType::Param`
which strips the sugar away.
Resolves: rdar://problem/34941557
This replaces the '[volatile]' flag. Now, class_method and
super_method are only used for vtable dispatch.
The witness_method instruction is still overloaded for use
with both ObjC protocol requirements and Swift protocol
requirements; the next step is to make it only mean the
latter, also using objc_method for ObjC protocol calls.
This ensures that we can write FileCheck patterns that match the end of sil
functions. Just using a FileCheck pattern against a brace is not sufficient in
the context of checking the SIL emitted by SILGen. This is because we could match a
different function's body and match the closing brace against the other
function's end brace.
With this change, one can be specific by checking:
// CHECK: } {{.*}} end sil function '<mangled name>'
The inspiration for this change is rdar://28685236. While updating SILGen tests
for that I have found many instances of SILGen tests pattern matching against
the wrong function bodies. This change will allow me to eliminate these problems
robustly.
rdar://29077869
When a parameter has distinct "nil" and "empty" values, "nil"
generally represents the default settings, while "empty" is
explicitly cleared.
rdar://problem/27196867
Under -enable-infer-default-arguments, the Clang importer infers some
default arguments for imported declarations. Rather than jumping
through awful hoops to make sure that we create default argument
generators (which will likely imply eager type checking), simply
handle these cases as callee-side expansions.
This makes -enable-infer-default-arguments usable, fixing
rdar://problem/24049927.
