[clang] [llvm] [MC/DC][Coverage] Loosen the limit of NumConds from 6 (PR #82448)

[NAKAMURA Takumi via llvm-commits]

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@@ -2122,20 +2135,70 @@ struct CounterCoverageMappingBuilder
                          subtractCounters(ParentCount, TrueCount));
   }
 
-  void createDecision(const BinaryOperator *E) {
+  void createOrCancelDecision(const BinaryOperator *E, unsigned Since) {
     unsigned NumConds = MCDCBuilder.getTotalConditionsAndReset(E);
     if (NumConds == 0)
       return;
 
+    // Extract [ID, Conds] to construct the graph.
+    llvm::SmallVector<mcdc::ConditionIDs> CondIDs(NumConds);
+    for (const auto &SR : ArrayRef(SourceRegions).slice(Since)) {
+      if (SR.isMCDCBranch()) {
+        auto [ID, Conds] = SR.getMCDCBranchParams();
+        CondIDs[ID] = Conds;
+      }
+    }
+
+    // Construct the graph and calculate `Indices`.
+    mcdc::TVIdxBuilder Builder(CondIDs);
+    unsigned NumTVs = Builder.NumTestVectors;
+    unsigned MaxTVs = CVM.getCodeGenModule().getCodeGenOpts().MCDCMaxTVs;
+    assert(MaxTVs < mcdc::TVIdxBuilder::HardMaxTVs);
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chapuni wrote:

`HardMaxTVs(int_max)` is actually the error code.

https://github.com/llvm/llvm-project/pull/82448