[llvm] [DLCov][NFC] Propagate annotated DebugLocs through transformations (PR #138047)

[Stephen Tozer via llvm-commits]

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@@ -142,6 +142,31 @@ namespace llvm {
     static inline DebugLoc getDropped() { return DebugLoc(); }
 #endif // LLVM_ENABLE_DEBUGLOC_COVERAGE_TRACKING
 
+    static DebugLoc getMergedLocations(ArrayRef<DebugLoc> Locs);
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SLTozer wrote:

I've tried moving the detailed comment over to the `DebugLoc` version, and added a shortened comment noting that the `DebugLoc` version is preferred - does this look good?

https://github.com/llvm/llvm-project/pull/138047