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

[via llvm-commits]

================
@@ -159,7 +159,10 @@ std::string DiagnosticInfoWithLocationBase::getLocationStr() const {
   unsigned Column = 0;
   if (isLocationAvailable())
     getLocation(Filename, Line, Column);
-  return (Filename + ":" + Twine(Line) + ":" + Twine(Column)).str();
+  return (getAbsolutePath()
----------------
CongzheUalberta wrote:

Thanks for the comment, I've updated it accordingly which remove the std::string to bool conversion, and used getAbsolutePath() always when the file location can be found.

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