[PATCH] D97585: [InstrProfiling] Use llvm.compiler.used instead of llvm.used for ELF

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

In D97585#2591568 <https://reviews.llvm.org/D97585#2591568>, @davidxl wrote:

> So to summarize, this patch is to enable compiler passes to respect comdat semantics while still enabling linker to do GC (after using GNU_RETAIN)?

The patch makes the ELF behavior the same (the metadata sections can be GCed) before or after D97448 <https://reviews.llvm.org/D97448>.

The comments and the paragraph in this patch are mainly to summarize the current situation (why we use `llvm.compiler.used/llvm.used`) :)


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https://reviews.llvm.org/D97585