[clang] [llvm] [clang][CoverageMapping] Refactor when setting MC/DC True/False (PR #78202)

[NAKAMURA Takumi via cfe-commits]

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@@ -663,54 +668,40 @@ struct MCDCCoverageBuilder {
 private:
   CodeGenModule &CGM;
 
-  llvm::SmallVector<MCDCConditionID> AndRHS;
-  llvm::SmallVector<MCDCConditionID> OrRHS;
-  llvm::SmallVector<const BinaryOperator *> NestLevel;
+  llvm::SmallVector<DecisionIDPair, 6> DecisionStack;
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chapuni wrote:

I meant; `llvm::SmallVector<DecisionIDPair>` w/o the explicit number.

https://github.com/llvm/llvm-project/pull/78202