[all-commits] [llvm/llvm-project] f0d325: [BOLT][NFCI] Use FileSymbols for local symbol disa...

[Amir Ayupov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f0d32575a1193741bc9ca90e5beced693cba28b0
      https://github.com/llvm/llvm-project/commit/f0d32575a1193741bc9ca90e5beced693cba28b0
  Author: Amir Ayupov <aaupov at fb.com>
  Date:   2025-06-20 (Fri, 20 Jun 2025)

  Changed paths:
    M bolt/lib/Rewrite/RewriteInstance.cpp

  Log Message:
  -----------
  [BOLT][NFCI] Use FileSymbols for local symbol disambiguation (#89088)

Remove SymbolToFileName mapping from every local symbol to its
containing FILE symbol name, and reuse FileSymbols to disambiguate
local symbols instead.

Also removes the check for `ld-temp.o` file symbol which was added to
prevent LTO build mode from affecting the disambiguated name. This may
cause incompatibility when using the profile collected on a binary built
in a different mode than the input binary.

Addresses #90661.

Speeds up discover file objects by 5-10% for large binaries:
- binary with ~1.2M symbols: 12.6422s -> 12.0297s
- binary with ~4.5M symbols: 48.8851s -> 43.7315s



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