[all-commits] [llvm/llvm-project] 2e009d: [clang] Frontend components for the relative vtabl...

[Leonard Chan via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 2e009dbcb3e373a59e6e84dce6d51ae8a29f60a5
      https://github.com/llvm/llvm-project/commit/2e009dbcb3e373a59e6e84dce6d51ae8a29f60a5
  Author: Leonard Chan <leonardchan at google.com>
  Date:   2020-06-10 (Wed, 10 Jun 2020)

  Changed paths:
    M clang/include/clang/AST/VTableBuilder.h
    M clang/include/clang/Basic/LangOptions.def
    M clang/include/clang/CodeGen/ConstantInitBuilder.h
    M clang/include/clang/Driver/Options.td
    M clang/lib/AST/ASTContext.cpp
    M clang/lib/AST/VTableBuilder.cpp
    M clang/lib/CodeGen/CGClass.cpp
    M clang/lib/CodeGen/CGVTables.cpp
    M clang/lib/CodeGen/CGVTables.h
    M clang/lib/CodeGen/ConstantInitBuilder.cpp
    M clang/lib/CodeGen/ItaniumCXXABI.cpp
    M clang/lib/CodeGen/MicrosoftCXXABI.cpp
    M clang/lib/Frontend/CompilerInvocation.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/child-inheritted-from-parent-in-comdat.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/child-vtable-in-comdat.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/cross-translation-unit-1.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/cross-translation-unit-2.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/cross-tu-header.h
    A clang/test/CodeGenCXX/RelativeVTablesABI/diamond-inheritance.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/diamond-virtual-inheritance.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/dynamic-cast.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/inheritted-virtual-function.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/inline-virtual-function.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/inlined-key-function.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/member-function-pointer.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/multiple-inheritance.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/no-alias-when-dso-local.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/no-stub-when-dso-local.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/override-pure-virtual-method.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/overriden-virtual-function.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/parent-and-child-in-comdats.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/parent-vtable-in-comdat.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/pass-byval-attributes.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/relative-vtables-flag.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/simple-vtable-definition.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/stub-linkages.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/thunk-mangling.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/type-info.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/vbase-offset.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/virtual-function-call.cpp
    A clang/test/CodeGenCXX/RelativeVTablesABI/vtable-hidden-when-in-comdat.cpp

  Log Message:
  -----------
  [clang] Frontend components for the relative vtables ABI

This patch contains all of the clang changes from D72959.

- Generalize the relative vtables ABI such that it can be used by other targets.
- Add an enum VTableComponentLayout which controls whether components in the
  vtable should be pointers to other structs or relative offsets to those structs.
  Other ABIs can change this enum to restructure how components in the vtable
  are laid out/accessed.
- Add methods to ConstantInitBuilder for inserting relative offsets to a
  specified position in the aggregate being constructed.

See D72959 for background info.

Differential Revision: https://reviews.llvm.org/D77592