[all-commits] [llvm/llvm-project] ef9559: [Coverage] Resurrect Branch:FalseCnt in SwitchStmt...

[NAKAMURA Takumi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ef955908302b6a6170e9775d89a94846fde12ebf
      https://github.com/llvm/llvm-project/commit/ef955908302b6a6170e9775d89a94846fde12ebf
  Author: NAKAMURA Takumi <geek4civic at gmail.com>
  Date:   2024-12-19 (Thu, 19 Dec 2024)

  Changed paths:
    M clang/lib/CodeGen/CoverageMappingGen.cpp
    M clang/test/CoverageMapping/switch.cpp
    M clang/test/CoverageMapping/switchmacro.c

  Log Message:
  -----------
  [Coverage] Resurrect Branch:FalseCnt in SwitchStmt that was pruned in #112694 (#120418)

I missed that FalseCnt for each Case was used to calculate percentage in
the SwitchStmt. At the moment I resurrect them.

In `!HasDefaultCase`, the pair of Counters shall be `[CaseCountSum,
FalseCnt]`. (Reversal of before #112694)
I think it can be considered as the False count on SwitchStmt.

FalseCnt shall be folded (same as current impl) in the coming
SingleByteCoverage changes, since percentage would not make sense.



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