[all-commits] [llvm/llvm-project] 2f9a80: [MC][NFC] Make ELFUniquingMap a StringMap (#95006)

[aengelke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2f9a80b7343606f62b3e907b888a8e9d17c0c551
      https://github.com/llvm/llvm-project/commit/2f9a80b7343606f62b3e907b888a8e9d17c0c551
  Author: aengelke <engelke at in.tum.de>
  Date:   2024-06-10 (Mon, 10 Jun 2024)

  Changed paths:
    M llvm/include/llvm/MC/MCContext.h
    M llvm/lib/MC/MCContext.cpp

  Log Message:
  -----------
  [MC][NFC] Make ELFUniquingMap a StringMap (#95006)

This avoid std::map, which is slow, and uses a StringMap. Section name,
group name, linked-to name and unique id are encoded into the key for
fast lookup.

This gives a measurable performance boost (>3%) for applications that
compile many small object files (e.g., functions in JIT compilers).



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