[clang] [LifetimeSafety] Run analysis in post-order of CallGraph for better annotation propagation (PR #174178)

[Utkarsh Saxena via cfe-commits]

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@@ -505,6 +505,8 @@ LANGOPT(EnableLifetimeSafety, 1, 0, NotCompatible, "Experimental lifetime safety
 
 LANGOPT(EnableLifetimeSafetyInference, 1, 0, NotCompatible, "Experimental lifetime safety inference analysis for C++")
 
+LANGOPT(EnableLifetimeSafetyInferencePostOrder, 1, 0, NotCompatible, "Experimental lifetime safety inference analysis in post-order for C++")
+
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usx95 wrote:

nit: Add a TODO to remove this and make this the default mode for this analysis. I would just wait for few performance measurements before completely removing this option.

https://github.com/llvm/llvm-project/pull/174178