[PATCH] D55293: [LLD][COFF] Unmerged sections

[Alexandre Ganea via Phabricator via llvm-commits]

aganea created this revision.
aganea added reviewers: rnk, zturner.
aganea added a project: lld.
Herald added a subscriber: MaskRay.

As suggested by @rnk here <https://reviews.llvm.org/D54802#inline-485011>, I moved `Map` up into `lld::coff::Writer` and added the concept of `UnmergedSection` (it was called `InputSection` in D54802 <https://reviews.llvm.org/D54802>).

`UnmergedSections` are simply sections that contribute to a `OutputSection`.
This is needed later by D54802 <https://reviews.llvm.org/D54802> to generate COFF groups in the `* Linker *` module.

I used a `std::map` below instead of a `DenseHash` because we need to retain a sorted order when enumerating.


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D55293

Files:
  COFF/Writer.cpp
  COFF/Writer.h

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