[PATCH] D46480: Update ThinLTO Indexing logic

[Rumeet Dhindsa via Phabricator via llvm-commits]

rdhindsa created this revision.
rdhindsa added reviewers: tejohnson, ruiu, pcc.
Herald added subscribers: llvm-commits, arichardson, inglorion, emaste.
Herald added a reviewer: espindola.

1. Instead of writing empty index for file, this patch tracks the state of files in  ObjectToIndexFileState. If the files are not indexed , only then we emit the empty files.
2. For ThinLTO Index only, skip cache pruning and iterating over tasks, since there is at most one output object file


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D46480

Files:
  lld/ELF/LTO.cpp
  lld/ELF/LTO.h

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