[llvm] [DiagnosticInfo] Output full file path instead of relative path (PR #68027)

[Matt Arsenault via llvm-commits]

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@@ -157,8 +157,10 @@ std::string DiagnosticInfoWithLocationBase::getLocationStr() const {
   StringRef Filename("<unknown>");
   unsigned Line = 0;
   unsigned Column = 0;
-  if (isLocationAvailable())
+  if (isLocationAvailable()) {
     getLocation(Filename, Line, Column);
+    return (getAbsolutePath() + ":" + Twine(Line) + ":" + Twine(Column)).str();
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arsenm wrote:

This is calling getLocation, then discarding the filename? Shouldn't this also be up to the client's decision on how to display the path? 

https://github.com/llvm/llvm-project/pull/68027