[PATCH] D62362: [COFF] De-virtualize Chunk and SectionChunk

[Reid Kleckner via Phabricator via llvm-commits]

rnk created this revision.
rnk added reviewers: ruiu, aganea.
Herald added a project: LLVM.

Shaves another pointer off of SectionChunk, reducing the size from 96 to
88 bytes, down from 144 before I started working on this. Combined with
D62356 <https://reviews.llvm.org/D62356>, this reduced peak memory usage when linking chrome_child.dll
from 713MB to 675MB, or 5%. At this point, I declare that I have reached
diminishing returns.

Create NonSectionChunk to provide virtual dispatch to the rest of the
chunk types.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D62362

Files:
  lld/COFF/Chunks.cpp
  lld/COFF/Chunks.h
  lld/COFF/DLL.cpp
  lld/COFF/Writer.cpp

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