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from e397992a62 Add compatibility alias for -Wno-#warnings new 10aee78afb [ubsan] Add a check for pointer overflow UB

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Summary of changes: docs/UndefinedBehaviorSanitizer.rst | 2 + include/clang/Basic/Sanitizers.def | 7 +- lib/CodeGen/CGExpr.cpp | 33 ++++-- lib/CodeGen/CGExprScalar.cpp | 210 ++++++++++++++++++++++++++++------ lib/CodeGen/CodeGenFunction.h | 8 ++ test/CodeGen/ubsan-pointer-overflow.m | 171 +++++++++++++++++++++++++++ test/Driver/fsanitize.c | 18 +-- 7 files changed, 391 insertions(+), 58 deletions(-) create mode 100644 test/CodeGen/ubsan-pointer-overflow.m