[all-commits] [llvm/llvm-project] d34214: [libc] Add and use 'cpp::launder' to guard placeme...

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d34214a85e3b9b94c2ccc6d63f3592be7eca0c24
      https://github.com/llvm/llvm-project/commit/d34214a85e3b9b94c2ccc6d63f3592be7eca0c24
  Author: Joseph Huber <huberjn at outlook.com>
  Date:   2025-06-27 (Fri, 27 Jun 2025)

  Changed paths:
    M libc/src/__support/CPP/new.h
    M libc/src/__support/GPU/allocator.cpp

  Log Message:
  -----------
  [libc] Add and use 'cpp::launder' to guard placement new (#146123)

Summary:
In the GPU allocator we reinterpret cast from a void pointer. We know
that an actual object was constructed there according to the C++ object
model, but to make it fully standards compliant we need to 'launder' it
to forward that information to the compiler. Add this function and call
it as appropriate.



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