[PATCH] D20997: [Coverage] Fix an assertion failure if the definition of an unused function spans multiple files.

[Igor Kudrin via cfe-commits]

ikudrin updated the summary for this revision.
ikudrin removed rL LLVM as the repository for this revision.
ikudrin updated this revision to Diff 59806.
ikudrin added a comment.

- Use `StartFileID` and `EndFileID` variables to eliminate redundant calls to `SM.getFileID()`.
- Add comment strings to asserts.


http://reviews.llvm.org/D20997

Files:
  lib/CodeGen/CoverageMappingGen.cpp
  test/CoverageMapping/Inputs/ends_a_scope_only
  test/CoverageMapping/Inputs/starts_a_scope_only
  test/CoverageMapping/unused_function.cpp

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