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Eliminate objcImpl field offset vectors

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We really don’t need ‘em; we can just adjust the direct field offsets.

The runtime entry point currently uses a weird little hack that we will refactor away shortly.
This commit is contained in:
Becca Royal-Gordon
2024-04-30 12:00:28 -07:00
parent 427386feea
commit d1f14e5814
7 changed files with 68 additions and 26 deletions
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14
include/swift/Runtime/RuntimeFunctions.def
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@@ -1437,17 +1437,15 @@ FUNCTION(UpdateClassMetadata2,
EFFECT(MetaData),
UNKNOWN_MEMEFFECTS)
// objc_class *swift_updatePureObjCClassMetadata(objc_class *self,
// ClassLayoutFlags flags,
// size_t numFields,
// TypeLayout * const *fieldTypes,
// size_t *fieldOffsets);
// objc_class *swift_updatePureObjCClassMetadata(
// objc_class *self,
// ClassLayoutFlags flags,
// size_t numFields,
// TypeLayout * const *fieldTypes);
FUNCTION(UpdatePureObjCClassMetadata,
swift_updatePureObjCClassMetadata, SwiftCC, AlwaysAvailable,
RETURNS(ObjCClassPtrTy),
ARGS(ObjCClassPtrTy, SizeTy, SizeTy,
Int8PtrPtrTy->getPointerTo(),
SizeTy->getPointerTo()),
ARGS(ObjCClassPtrTy, SizeTy, SizeTy, Int8PtrPtrTy->getPointerTo()),
ATTRS(NoUnwind),
EFFECT(MetaData),
UNKNOWN_MEMEFFECTS)