[PATCH] Code coverage tool that uses the new coverage mapping format and clang's instrumentation based profiling data

[Alex Lorenz]

I've added a testcase, please take a look at the setup.

http://reviews.llvm.org/D4445

Files:
  lib/ProfileData/CoverageMappingReader.cpp
  test/tools/llvm-cov/Inputs/lineExecutionCounts.covmapping
  test/tools/llvm-cov/Inputs/lineExecutionCounts.profdata
  test/tools/llvm-cov/showLineExecutionCounts.cpp
  tools/llvm-cov/CMakeLists.txt
  tools/llvm-cov/CodeCoverage.cpp
  tools/llvm-cov/CoverageFilters.cpp
  tools/llvm-cov/CoverageFilters.h
  tools/llvm-cov/CoverageReport.cpp
  tools/llvm-cov/CoverageReport.h
  tools/llvm-cov/CoverageSummary.cpp
  tools/llvm-cov/CoverageSummary.h
  tools/llvm-cov/CoverageSummaryInfo.cpp
  tools/llvm-cov/CoverageSummaryInfo.h
  tools/llvm-cov/CoverageViewOptions.h
  tools/llvm-cov/FunctionCoverageMapping.h
  tools/llvm-cov/LLVMBuild.txt
  tools/llvm-cov/Makefile
  tools/llvm-cov/RenderingSupport.h
  tools/llvm-cov/SourceCoverageDataManager.cpp
  tools/llvm-cov/SourceCoverageDataManager.h
  tools/llvm-cov/SourceCoverageView.cpp
  tools/llvm-cov/SourceCoverageView.h
  tools/llvm-cov/TestingSupport.cpp
  tools/llvm-cov/llvm-cov.cpp
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