[PATCH] D58599: [LLD] Add summary support

[Alexandre Ganea via Phabricator via llvm-commits]

aganea created this revision.
aganea added reviewers: rnk, zturner, mstorsjo, ruiu, thakis.
Herald added subscribers: jdoerfert, mgorny.
Herald added a project: LLVM.

I am proposing a very simple summary of the data processed by LLD, to be displayed at the end of linking.
Currently, this is enabled through a hidden (LLD-specific) COFF flag `/summary`, but it could be used in the other drivers too.
Here's an example output:

                                      Summary
  --------------------------------------------------------------------------------
             4777 Input OBJ files (expanded from all cmd-line inputs)
               68 Dependent PDB files
               31 Dependent PCH OBJ files
            49283 Output PDB strings
          1785681 Output global symbol records

It is purposely very simple: it displays only a <u64,string> pair; there's no grouping or sorting whatsoever.
Also, the line will not be displayed if the value is zero, to avoid noise.


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D58599

Files:
  COFF/Config.h
  COFF/Driver.cpp
  COFF/Options.td
  COFF/PDB.cpp
  Common/CMakeLists.txt
  Common/Summary.cpp
  test/COFF/pdb-type-server-simple.test
  test/COFF/precomp-link.test

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