[all-commits] [llvm/llvm-project] 003b60: [clang] Ensure correct metadata for relative vtables

[PiJoules via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 003b6033e1b254dd96ddb341f375b73ee5bed2af
      https://github.com/llvm/llvm-project/commit/003b6033e1b254dd96ddb341f375b73ee5bed2af
  Author: Leonard Chan <leonardchan at google.com>
  Date:   2022-12-08 (Thu, 08 Dec 2022)

  Changed paths:
    M clang/lib/CodeGen/CGVTables.cpp
    M clang/lib/CodeGen/CGVTables.h
    M clang/lib/CodeGen/CodeGenModule.h
    M clang/test/CodeGenCXX/type-metadata.cpp

  Log Message:
  -----------
  [clang] Ensure correct metadata for relative vtables

Prior to this, metadata pertaining to the size or address point offsets
into a relative vtable were twice the value they should be (treating
component widths as pointer width rather than 4 bytes). This prevented
some vtables from being devirtualized with D134320. This ensures the
correct metadata is written so whole program devirtualization can catch
these remaining devirt targets.

Differential Revision: https://reviews.llvm.org/D134687