[libcxx-commits] [PATCH] D93922: Mangle `__alignof__` differently than `alignof`.

[James Y Knight via Phabricator via libcxx-commits]

jyknight created this revision.
jyknight added reviewers: rsmith, rjmccall.
jyknight requested review of this revision.
Herald added projects: clang, libc++abi, LLVM.
Herald added subscribers: llvm-commits, libcxx-commits, cfe-commits.
Herald added a reviewer: libc++abi.

The two operations have acted differently since Clang 8, but were
unfortunately mangled the same. The new mangling uses new "vendor
extended expression" syntax proposed in
https://github.com/itanium-cxx-abi/cxx-abi/issues/112

GCC had the same mangling problem, https://gcc.gnu.org/PR88115, and
will hopefully be switching to the same mangling as implemented here.

Additionally, fix the mangling of `__uuidof` to use the new extension
syntax, instead of its previous nonstandard special-case.

Adjusts the demangler accordingly.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D93922

Files:
  clang/lib/AST/ItaniumMangle.cpp
  clang/test/CodeGenCXX/mangle-alignof.cpp
  clang/test/CodeGenCXX/microsoft-uuidof-mangling.cpp
  libcxxabi/src/demangle/ItaniumDemangle.h
  libcxxabi/test/test_demangle.pass.cpp
  llvm/include/llvm/Demangle/ItaniumDemangle.h

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