[PATCH] D126586: [InstrProf][WIP] Implement boolean counters in coverage

[Gulfem Savrun Yeniceri via Phabricator via llvm-commits]

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[InstrProf][WIP] Implement boolean counters in coverage

      

This patch inserts 1-byte boolean counters instead of an 8-byte counters
into llvm profiles for source-based code coverage. The origial idea was
proposed as "block-cov" for PGO, and this patch reuses that idea for coverage.
https://groups.google.com/g/llvm-dev/c/r03Z6JoN7d4

      

This is a WIP prototype implementation which only implements boolean
 counters for only a handful of control-flow statements (while, for, if, switch).


https://reviews.llvm.org/D126586

Files:
  clang/lib/CodeGen/CGStmt.cpp
  clang/lib/CodeGen/CodeGenModule.cpp
  clang/lib/CodeGen/CodeGenPGO.cpp
  clang/lib/CodeGen/CodeGenPGO.h
  clang/lib/CodeGen/CoverageMappingGen.cpp
  clang/test/CoverageMapping/boolean-counters.cpp
  llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h
  llvm/lib/ProfileData/Coverage/CoverageMapping.cpp
  llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp

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