================ @@ -0,0 +1,32 @@ +==================== +Callee Type Metadata +==================== + +Introduction +============ +This ``!callee_type`` metadata is introduced as part of an ongoing effort to generate a call graph +section in the object file. The broader design for the call graph section and the compiler flags which +will enable the feature will be documented as those changes land. The ``!callee_type`` metadata is used +to identify types of intended callees of indirect call instructions. The ``!callee_type`` metadata is a +list of one or more ``!type`` metadata objects (See :doc:`TypeMetadata`) with each ``!type`` metadata +pointing to a callee's :ref:`type identifier +<calleetype-type-identifier>`. + +.. _calleetype-type-identifier: + +Type identifier +================ + +The type for an indirect call target is the callee's function signature. +Mapping from a type to an identifier is an ABI detail. +In the current implementation, an identifier of type T is +computed as follows: ---------------- ilovepi wrote:
It may be worth mentioning that this is the same type identifier used by CFI. https://github.com/llvm/llvm-project/pull/87573 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
