Optimizer: support statically initialized `Atomic` and `Mutex` globals#83505

Merged

eeckstein merged 10 commits intoswiftlang:mainfrom

eeckstein:non-loadable-global-inits

Aug 4, 2025

Commits on Aug 3, 2025

DeadObjectElimination: handle the builtin "prepareInitialization"
eeckstein
committed
SILGen: use builtin `prepareInitialization` instead of `zeroInitializer` when generating a value constructor for an empty non-copyable type
eeckstein
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SIL: add `rawLayoutSubstitutedLikeType` and `rawLayoutSubstitutedCountType` in `Type`
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SIL/AST: add `var InjectEnumAddrInst.element` and `var EnumElementDecl.hasAssociatedValues`
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SIL: add the recursive property `isOrContainsRawLayout` to `SILTypeProperties`
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SIL: don't set the `let` flag on a SILGlobalVariable if it contains a struct with `@_rawLayout`
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IRGen: allow all kind of `Builtin.zeroInitializer` in statically initialized globals
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InitializeStaticGlobals: allow statically initialized globals of non-loadable types
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InitializeStaticGlobals: support initializing globals with `@_rawLayout` types, like `Atomic`
eeckstein
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InitializeStaticGlobals: support non-loadable enums
eeckstein
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