[PATCH] D12309: [lld] COFF: Implement parallel LTO code generation.

[Peter Collingbourne via llvm-commits]

pcc created this revision.
pcc added a reviewer: ruiu.
pcc added a subscriber: llvm-commits.
pcc added a dependency: D12260: CodeGen: Introduce LinkedCodeGen and teach LTOCodeGenerator to use it..

This is exposed via a new flag /opt:lldltojobs=N, where N is the number of
code generation threads.

Depends on D12260

http://reviews.llvm.org/D12309

Files:
  COFF/Config.h
  COFF/Driver.cpp
  COFF/SymbolTable.cpp
  COFF/SymbolTable.h
  test/COFF/lto-parallel.ll
  test/COFF/weak-external.test
  test/COFF/weak-external3.test

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