[PATCH] D35386: Speed up gdb index creation

[Rafael Ávila de Espíndola via Phabricator via llvm-commits]

rafael created this revision.
Herald added subscribers: aprantl, emaste.

This depends on https://reviews.llvm.org/D35373

With that in place we can use lld's own infrastructure for the low level detail of dwarf parsing.

With this we don't decompress sections twice, we don't scan all realocations and even with this simplistic implementation linking clang with gdb index goes from 34.09 seconds to 20.80 seconds.


https://reviews.llvm.org/D35386

Files:
  ELF/GdbIndex.cpp
  ELF/GdbIndex.h
  ELF/InputFiles.cpp
  ELF/InputFiles.h
  ELF/SyntheticSections.cpp
  test/ELF/invalid/invalid-debug-relocations.test

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