[clang] [clang] Mark some language options as benign. (PR #131569)

[via cfe-commits]

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@@ -139,18 +139,18 @@ ENUM_LANGOPT(AltivecSrcCompat, AltivecSrcCompatKind, 2,
 LANGOPT(ConvergentFunctions, 1, 1, "Assume convergent functions")
 LANGOPT(AltiVec           , 1, 0, "AltiVec-style vector initializers")
 LANGOPT(ZVector           , 1, 0, "System z vector extensions")
-LANGOPT(Exceptions        , 1, 0, "exception handling")
-LANGOPT(ObjCExceptions    , 1, 0, "Objective-C exceptions")
-LANGOPT(CXXExceptions     , 1, 0, "C++ exceptions")
+COMPATIBLE_LANGOPT(Exceptions        , 1, 0, "exception handling")
+COMPATIBLE_LANGOPT(ObjCExceptions    , 1, 0, "Objective-C exceptions")
+COMPATIBLE_LANGOPT(CXXExceptions     , 1, 0, "C++ exceptions")
 LANGOPT(EHAsynch          , 1, 0, "C/C++ EH Asynch exceptions")
 ENUM_LANGOPT(ExceptionHandling, ExceptionHandlingKind, 3,
              ExceptionHandlingKind::None, "exception handling")
 LANGOPT(IgnoreExceptions  , 1, 0, "ignore exceptions")
 LANGOPT(ExternCNoUnwind   , 1, 0, "Assume extern C functions don't unwind")
 LANGOPT(AssumeNothrowExceptionDtor , 1, 0, "Assume exception object's destructor is nothrow")
 LANGOPT(TraditionalCPP    , 1, 0, "traditional CPP emulation")
-LANGOPT(RTTI              , 1, 1, "run-time type information")
-LANGOPT(RTTIData          , 1, 1, "emit run-time type information data")
+BENIGN_LANGOPT(RTTI              , 1, 1, "run-time type information")
+BENIGN_LANGOPT(RTTIData          , 1, 1, "emit run-time type information data")
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cor3ntin wrote:

There is a `__cpp_rtti` macro so this can be observed in the ast

https://github.com/llvm/llvm-project/pull/131569