This makes super calls name-based (no target) and add direct calls with
both receiver and explicit target.
Super call resolution translates the name-based super calls into direct
calls after they have been cloned into the mixin application.
For JS backends, it should suffice to clone mixed-in methods that
contain super calls, but that transformation is not part of this CL.
This also adds a --target option to dartk designating the target to
which the kernel IR should be specialized. The new transformation
is run when --target=vm.
BUG=
R=kmillikin@google.com
Review URL: https://chromereviews.googleplex.com/486537013 .
We need the ability to efficiently transform a mixin application class
into a regular class, and the separation was obstructing it. It also
simplifies the IR a bit, although it no longer enforces the invariant
that mixin applications cannot contain fields and procedures.
The binary format is unchanged, so the separation still shows up in
there. This ensures the CL can land without any changes to the SDK.
BUG=
R=vegorov@google.com
Review URL: https://chromereviews.googleplex.com/488407013 .
LocalInitializer lets us to bind temporaries to variables in the
initializer list. We use it to ensure the arguments to super() are
evaluated at the right time.
accessors.dart and the new file super_calls.dart have been moved into
a folder "frontend" for frontend helpers that operate on Kernel IR.
BUG=
R=kustermann@google.com
Review URL: https://chromereviews.googleplex.com/457457013 .
For constructor bodies, we arbitrarily set the return type to 'void'.
Although there is hardly any legitimate use for the "return type" of
a constructor, this doesn't have any overhead and it simplifies the
restriction on FunctionNode.
BUG=
R=kmillikin@google.com
Review URL: https://chromereviews.googleplex.com/446827013 .
Asger Feldthaus