[all-commits] [llvm/llvm-project] 5e4605: [Coverage] Make additional counters available for ...

[NAKAMURA Takumi via All-commits]

  Branch: refs/heads/users/chapuni/cov/single/nextcount
  Home:   https://github.com/llvm/llvm-project
  Commit: 5e460594c8a2550c38c759b2e6f1c5dc4152f820
      https://github.com/llvm/llvm-project/commit/5e460594c8a2550c38c759b2e6f1c5dc4152f820
  Author: NAKAMURA Takumi <geek4civic at gmail.com>
  Date:   2024-10-18 (Fri, 18 Oct 2024)

  Changed paths:
    M clang/lib/CodeGen/CodeGenFunction.h
    M clang/lib/CodeGen/CodeGenPGO.cpp
    M clang/lib/CodeGen/CodeGenPGO.h
    M clang/lib/CodeGen/CoverageMappingGen.cpp
    M llvm/lib/ProfileData/Coverage/CoverageMapping.cpp

  Log Message:
  -----------
  [Coverage] Make additional counters available for BranchRegion. NFC.

`getBranchCounterPair()` allocates an additional Counter to SkipPath
in `SingleByteCoverage`.

`IsCounterEqual()` calculates the comparison with rewinding counter
replacements.

`NumRegionCounters` is updated to take additional counters in account.

`incrementProfileCounter()` has a few additiona arguments.

- `UseSkipPath=true`, to specify setting counters for SkipPath. It
  assumes `UseSkipPath=false` is used together.

- `UseBoth` may be specified for marking another path. It introduces
  the same effect as issueing `markStmtAsUsed(!SkipPath, S)`.

`llvm-cov` discovers counters in `FalseCount` to allocate
`MaxCounterID` for empty profile data.



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