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Changes from Git (git http://labmaster3.local/git/llvm-project.git)

Summary

  1. Fix "pointer is null" static analyzer warnings. NFCI. (details)
Commit 54b2914accb4f5c9b58305fd6da405d20a47c452 by llvm-dev
Fix "pointer is null" static analyzer warnings. NFCI.
Use castAs<> instead of getAs<> since the pointers are dereferenced
immediately and castAs will perform the null assertion for us.
The file was modifiedclang/lib/AST/VTableBuilder.cpp