[clang] [llvm] [Coverage] Introduce "partial fold" on BranchRegion (PR #112694)

[Jessica Paquette via cfe-commits]

================
@@ -719,10 +720,10 @@ struct FunctionRecord {
         Region.Kind == CounterMappingRegion::MCDCBranchRegion) {
       CountedBranchRegions.emplace_back(Region, Count, FalseCount,
                                         HasSingleByteCoverage);
-      // If both counters are hard-coded to zero, then this region represents a
+      // If either counters is hard-coded to zero, then this region represents 
a
       // constant-folded branch.
-      if (Region.Count.isZero() && Region.FalseCount.isZero())
-        CountedBranchRegions.back().Folded = true;
+      CountedBranchRegions.back().TrueFolded = Region.Count.isZero();
----------------
ornata wrote:

rename Region.Count to Region.TrueCount?

https://github.com/llvm/llvm-project/pull/112694
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