[PAC] Define __builtin_ptrauth_type_discriminator (#100204)

The builtin computes the discriminator for a type, which can be used to
sign/authenticate function pointers and member function pointers.

If the type passed to the builtin is a C++ member function pointer type,
the result is the discriminator used to signed member function pointers
of that type. If the type is a function, function pointer, or function
reference type, the result is the discriminator used to sign functions
of that type. It is ill-formed to use this builtin with any other type.

A call to this function is an integer constant expression.

Co-Authored-By: John McCall rjmccall@apple.com
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  36. pyproject.toml
  37. README.md
  38. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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Welcome to the LLVM project!

This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.

The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.

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Other components include: the libc++ C++ standard library, the LLD linker, and more.

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