[all-commits] [llvm/llvm-project] 4c0a0f: [SandboxVectorizer][NFCI] Fix use of possibly-unin...

[Tyler Lanphear via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4c0a0f72418b21161b5c1fb9225462bd039121e3
      https://github.com/llvm/llvm-project/commit/4c0a0f72418b21161b5c1fb9225462bd039121e3
  Author: Tyler Lanphear <tylanphear at gmail.com>
  Date:   2025-01-09 (Thu, 09 Jan 2025)

  Changed paths:
    M llvm/include/llvm/SandboxIR/Context.h
    M llvm/lib/SandboxIR/Context.cpp

  Log Message:
  -----------
  [SandboxVectorizer][NFCI] Fix use of possibly-uninitialized scalar. (#122201)

The `EraseCallbackID` field is not always initialized in the ctor for
SeedCollector; if not, it will be used uninitialized by its dtor. This
could potentially lead to the erasure of a random callback, leading to a
bug.

Fixed by making `CallbackID` an opaque type, which is always
default-initialized to an invalid ID.



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