Joe Groff 2641d566ac IRGen/Runtime: Use only the 'layout' subset of the vwtable to perform value type layout. ...

Full type metadata isn't necessary to calculate the runtime layout of a dependent struct or enum; we only need the non-function data from the value witness table (size, alignment, extra inhabitant count, and POD/BT/etc. flags). This can be generated more efficiently than the type metadata for many types--if we know a specific instantiation is fixed-layout, we can regenerate the layout information, or if we know the type has the same layout as another well-known type, we can get the layout from a common value witness table. This breaks a deadlock in most (but not all) cases where a value type is recursive using classes or fixed-layout indirected structs like UnsafePointer. rdar://problem/19898165

Swift SVN r30243

2015-07-16 01:28:42 +00:00

..

Concurrent.h

Remove the custom memory allocator. It was not effective in accelerating the metadata lookups and Greg and Dave have suggested other solutions for accelerating this call.

2015-01-31 00:44:17 +00:00

Config.h

Runtime: (Almost) cleanse of global constructors and destructors.

2015-05-06 04:59:56 +00:00

Enum.h

IRGen/Runtime: Use only the 'layout' subset of the vwtable to perform value type layout.

2015-07-16 01:28:42 +00:00

Heap.h

Remove traces of the custom Swift zone

2014-09-28 00:10:49 +00:00

HeapObject.h

[llvm-arc-opts] Implement swift_{retain,release}_n.

2015-07-15 00:03:03 +00:00

InstrumentsSupport.h

[llvm-arc-opts] Implement swift_{retain,release}_n.

2015-07-15 00:03:03 +00:00

Metadata.h

IRGen/Runtime: Use only the 'layout' subset of the vwtable to perform value type layout.

2015-07-16 01:28:42 +00:00

ObjCBridge.h

Eliminate all uses of the typeof value witness.

2014-07-30 04:40:58 +00:00

Once.h

IRGen: Emit the "done" check for Builtin.once inline.

2015-05-05 15:35:57 +00:00

Reflection.h

stdlib: rename Reflectable.{getMirror() -> _getMirror()}

2015-07-01 00:31:32 +00:00