emission instead of hand coded magic. Eliminating special cases allows simplifying
other parts of the compiler, and this probably helps the error handling initiative
as well.
This uses the (horrible) new null_class instruction to properly model rebinding of
self. The code that SILGen was producing before was wildly incorrect and we only
got lucky that it seemed to work in most cases before.
NFC except that SILGen tests see the new null_class instructions, and we get better
location info for 'return nil' for obscure reasons that don't really matter.
Swift SVN r27530
already set up, allowing clients to generate code before the top-level
cleanup stack is emitted.
Use this to switch value constructors onto emitEpilog() and, more importantly,
to start managing the self box as a normal local variable tracked with cleanups
instead of being tracked with ad-hoc code spread through SILGen.
Among other things, once classes are switched over to the same model, we can
remove SGF.FailSelfDecl and the code to support it. NFC.
Swift SVN r27472
value handling. Instead of doing everything itself, leverage the cleanup mechanics
of emitLocalVariableWithCleanup to ensure the self box is cleaned up on all paths out
of the constructor, and use the epilog generation stuff to handle all the return
path mechanics.
NFC, no change at all to generated code.
Swift SVN r27466
- Use virtual dispatch to localize some predicates instead
of having special cases for LetValue inits in global places.
- Improve 'const'ness of methods.
- Introduce a common "KnownAddressInitialization" class to centralize
the notion of an initialization corresponding to a specific physical
address that is known up front. Consolidate dupes of this concept into
uses of it.
NFC.
Swift SVN r27462
