[PATCH] D126491: [lld][WebAssembly] Avoid importing/exporting hidden symbols in shared libraries

[Sam Clegg via Phabricator via llvm-commits]

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We have some special handling for weakly defined symbols where we both
import and export them, but this is not needed for hidden symbols which
should never be imported or exported.

See https://github.com/emscripten-core/emscripten/pull/16972

This should also help with:
https://github.com/emscripten-core/emscripten/issues/15487


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126491

Files:
  lld/test/wasm/shared-weak-symbols.s
  lld/wasm/Symbols.cpp
  lld/wasm/Writer.cpp

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