[PATCH] D43794: [InstrProfiling] Emit the runtime hook when no counters are lowered

[Vedant Kumar via Phabricator via llvm-commits]

vsk updated this revision to Diff 136196.
vsk added a comment.

- Simplify the patch per David's feedback.
- Add an end-to-end test: https://reviews.llvm.org/D43844


https://reviews.llvm.org/D43794

Files:
  include/llvm/Transforms/InstrProfiling.h
  lib/Transforms/Instrumentation/InstrProfiling.cpp
  test/Instrumentation/InstrProfiling/linkage.ll
  test/Instrumentation/InstrProfiling/no-counters.ll
  test/Instrumentation/InstrProfiling/profiling.ll

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