[all-commits] [llvm/llvm-project] 57c5c1: [clang][ExprConstant] fix __builtin_object_size fo...

[Nick Desaulniers via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 57c5c1ab2a188b7962c9de5ac0f95e3c7441940a
      https://github.com/llvm/llvm-project/commit/57c5c1ab2a188b7962c9de5ac0f95e3c7441940a
  Author: Nick Desaulniers <ndesaulniers at google.com>
  Date:   2023-05-22 (Mon, 22 May 2023)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/AST/ExprConstant.cpp
    M clang/test/CodeGen/object-size.c

  Log Message:
  -----------
  [clang][ExprConstant] fix __builtin_object_size for flexible array members

As reported by @kees, GCC treats __builtin_object_size of structures
containing flexible array members (aka arrays with incomplete type) not
just as the sizeof the underlying type, but additionally the size of the
members in a designated initializer list.

Fixes: https://github.com/llvm/llvm-project/issues/62789

Reviewed By: erichkeane

Differential Revision: https://reviews.llvm.org/D150892