[PATCH] D18487: [ThinLTO] Add optional import message and statistics

[Teresa Johnson via llvm-commits]

tejohnson created this revision.
tejohnson added a reviewer: joker.eph.
tejohnson added a subscriber: llvm-commits.
Herald added a subscriber: joker.eph.

Add a statistic to count the number of imported functions. Also, add a
new -print-imports option to emit a trace of imported functions, that
works even for an NDEBUG build.

Note that emitOptimizationRemark does not work for the above printing as
it expects a Function object and DebugLoc, neither of which we will have
particularly when we move to summary-based importing.

http://reviews.llvm.org/D18487

Files:
  lib/Transforms/IPO/FunctionImport.cpp
  test/Transforms/FunctionImport/funcimport.ll

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