If a single-payload union doesn't use up all of its payload's extra inhabitants, it can claim the remaining ones as its own. While we're here, specialize the extra inhabitants implementation for no-payload unions to generously (and more efficiently) give out all integer values within its storage type above the largest discriminator as extra inhabitants, instead of relying entirely on the spare bits mask.
Swift SVN r8470
Add functions to dynamically query the extra inhabitants of a single-payload union's payload metadata, then identify or store bit patterns used to represent empty cases, whether they happen to use extra inhabitants or added tag bits.
Swift SVN r8320
Instead of hardcoding a walk of a list of fill ops, have generic metadata templates carry a pointer to a fill function for swift_getGenericMetadata to invoke to perform the fill operations. For types with dynamic layout, we will need to be able to perform more complex fill operations than a simple transfer of arguments into generic metadata slots.
Swift SVN r7893
Instead of letting swift_NSStringToString leak malloced memory, use swift_allocPOD to allocate storage for the converted String, and stash the heap object into the created string.
Swift SVN r7872
swift_allocPOD allocates a heap object capable of holding POD data of some given size and alignment. This will allow 'alloc_box' and 'alloc_array' to lower specially without instantiating do-nothing heap metadata for POD types, as described in <rdar://problem/13129334>. Update the dynamic swift_allocBox entry point to use swift_allocPOD for POD types. This can also be used by other runtime functions that need to allocate reference-counted scratch memory, such as swift_NSStringToString, as noted in <rdar://problem/14646715>.
Swift SVN r7860
This ended up being easiest with a runtime function. I couldn't push this
into the standard library because the standard library doesn't know about
NSObject, and I couldn't compile the ObjectiveC module as -parse-stdlib
because it uses standard library types and doesn't otherwise know how to
find the "swift" module.
Swift SVN r7581
Make sure that all assigns are lowered by the memory promotion pass, even those
that don't refer to a box. These are always assignments, not initializations.
Swift SVN r7543
to being a semantic assign. The functional difference here is only
for unowned pointers, where now the conversion from strong to unowned
is implicit in the assign.
The logic behind this is that 'assign' is really part of SILGen, that
is only moved later to make it easier to make it be flow sensitive.
Since it is part of SILGen and will be using some of the type lowering
functionality used by SILGen, we should play by its rules.
No functionality change.
Swift SVN r7507
...rather than as a separate step. This avoids duplicating Parse and Sema
work for these. (This is the new and correct version of r7377.)
Also, remove leftover code for building "swift.swift" and friends in lieu
of proper modules. We're not going back to those days. :-)
Swift SVN r7420
It's used for class-bounded protocols, not just Foundation objects.
No test because I couldn't figure out how to write a non-compilation test.
Swift SVN r7367
