[all-commits] [llvm/llvm-project] 2a2629: [ELF] Make isExported accurate early

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2a26292388fcab0c857c91b2d08074c33abd37e8
      https://github.com/llvm/llvm-project/commit/2a26292388fcab0c857c91b2d08074c33abd37e8
  Author: Fangrui Song <i at maskray.me>
  Date:   2025-01-26 (Sun, 26 Jan 2025)

  Changed paths:
    M lld/ELF/Driver.cpp

  Log Message:
  -----------
  [ELF] Make isExported accurate early

LTO compilation might define symbols not in the symbol table (e.g.
__emutls_v.x in test/ELF/lto/wrap-unreferenced-before-codegen.test).
These symbols have a false `isExported` until
`demoteSymbolsAndComputeIsPreemptible`. This is usually benign as we do
not reference `isExported` that early.

Ensure that `isExported` is correct early. This helps remove a redundant
`isExported` computation in `demoteSymbolsAndComputeIsPreemptible`.



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