[all-commits] [llvm/llvm-project] 9715af: [AIX][clang] Storage Locations for Constant Pointers

[Qiongsi Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9715af434579022b5ef31781be40b722d7e63bee
      https://github.com/llvm/llvm-project/commit/9715af434579022b5ef31781be40b722d7e63bee
  Author: Qiongsi Wu <qwu at ibm.com>
  Date:   2023-05-15 (Mon, 15 May 2023)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/Basic/CodeGenOptions.def
    M clang/include/clang/Basic/DiagnosticDriverKinds.td
    M clang/include/clang/Driver/Options.td
    M clang/lib/CodeGen/BackendUtil.cpp
    M clang/lib/Driver/ToolChains/AIX.cpp
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/lib/Driver/ToolChains/CommonArgs.cpp
    M clang/lib/Frontend/CompilerInvocation.cpp
    A clang/test/CodeGen/PowerPC/aix-roptr.c
    A clang/test/Driver/ppc-roptr.c

  Log Message:
  -----------
  [AIX][clang] Storage Locations for Constant Pointers

This patch adds clang options `-mxcoff-roptr` and `-mno-xcoff-roptr` to specify storage locations for constant pointers on AIX.

When the `-mxcoff-roptr` option is in effect, constant pointers, virtual function tables, and virtual type tables are placed in read-only storage. When the `-mno-xcoff-roptr` option is in effect, pointers, virtual function tables, and virtual type tables are placed are placed in read/write storage.

This patch depends on https://reviews.llvm.org/D144189.

Reviewed By: hubert.reinterpretcast, stephenpeckham

Differential Revision: https://reviews.llvm.org/D144190