invoke-ssaf feature availability#196168
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May 4, 2026 14:09
Upstream commit c3761b6 ("[clang] Add formal linkage to textual AST dump (llvm#194600)") teaches TextNodeDumper to print formal linkage (external-linkage / internal-linkage / module-linkage) for NamedDecls in textual AST dumps. Insert external-linkage between definition and instantiated_from in all 13 ClassTemplateSpecializationDecl CHECKs in the test.
) The RFC for typed allocator support was approved quite a while ago, and this PR actually begins the actual upstreaming process. This PR includes all of the code machinery: the annotations, the type inference, the encoding of the inferred type, and the final call re-writing. Due to the complexity of the inference especially, I've broken the implementation into separate files, SemaTypedMemory.cpp containing the attribute parsing and diagnostics, and CGTypedMemory.cpp to actually handle the destination rewriting and planting the descriptors. The core inference is handled in TypedMemoryInference.cpp, with the other TypedMemory* files providing supporting functionality. The core details can be found in clang/docs/TypedMemoryOperations.rst and the original RFC at https://discourse.llvm.org/t/rfc-typed-allocator-support/79720
Registers the invoke-ssaf feature in features.json so that build systems and tools can query clang's feature availability and conditionally enable SSAF invocation support.
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