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Stabilize and simplify SIL linkage and serialization

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The main point of this change is to make sure that a shared function always has a body: both, in the optimizer pipeline and in the swiftmodule file.
This is important because the compiler always needs to emit code for a shared function. Shared functions cannot be referenced from outside the module.
In several corner cases we missed to maintain this invariant which resulted in unresolved-symbol linker errors.

As side-effect of this change we can drop the shared_external SIL linkage and the IsSerializable flag, which simplifies the serialization and linkage concept.
This commit is contained in:
Erik Eckstein
2022-03-07 09:36:53 +01:00
parent 05a3f1fa84
commit 6a020f8f15
159 changed files with 790 additions and 947 deletions
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lib/Serialization/ModuleFormat.h
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@@ -56,7 +56,7 @@ const uint16_t SWIFTMODULE_VERSION_MAJOR = 0;
/// describe what change you made. The content of this comment isn't important;
/// it just ensures a conflict if two people change the module format.
/// Don't worry about adhering to the 80-column limit for this line.
const uint16_t SWIFTMODULE_VERSION_MINOR = 677; // Opaque archetypes carry a generic signature
const uint16_t SWIFTMODULE_VERSION_MINOR = 678; // remove shared_external linkage
/// A standard hash seed used for all string hashes in a serialized module.
///