================ @@ -0,0 +1,150 @@ +//===-- LowerCommentStringPass.cpp - Lower Comment string metadata -------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===---------------------------------------------------------------------===// +// +// This pass lowers the module-level comment string metadata emitted by Clang: +// +// !comment_string.loadtime = !{!"Copyright ..."} +// +// into concrete, translation-unit-local globals. +// This Pass is enabled only for AIX. +// For each module (translation unit), the pass performs the following: +// +// 1. Creates a null-terminated, internal constant string global +// (`__loadtime_comment_str`) containing the copyright text with +// section attribute "__loadtime_comment". The backend places this ---------------- hubert-reinterpretcast wrote:
There needs to be more rationale here for using a named section. What is the benefit of having it? My understanding is that it interacts with (full) LTO such that the linker is less able to garbage-collect individual strings. Perhaps that is fine as the general intent seems to be for the strings to be kept. A possible benefit of the named section is that the strings are more likely to be grouped in a block that does not interfere with the rest of the program. https://github.com/llvm/llvm-project/pull/178184 _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
