[PATCH] D110363: [DWARF][NFC] add ParentIdx and SiblingIdx to DWARFDebugInfoEntry for faster navigation.

[Alexey Lapshin via Phabricator via llvm-commits]

avl created this revision.
avl added reviewers: clayborg, dblaikie, JDevlieghere, simon.giesecke.
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This patch implements suggestion done while reviewing D102634 <https://reviews.llvm.org/D102634>. It adds two fields:
ParentIdx and SiblingIdx. These fields allow fast navigation to die parent and
die sibling. These fields are set at the moment when dies are loaded.

dsymutil works 2% faster with this patch(run on clang binary).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110363

Files:
  llvm/include/llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h
  llvm/lib/DebugInfo/DWARF/DWARFDebugInfoEntry.cpp
  llvm/lib/DebugInfo/DWARF/DWARFUnit.cpp
  llvm/unittests/DebugInfo/DWARF/DWARFDieManualExtractTest.cpp

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