[clang] abe1bb7 - [clang] MicrosoftCXXNameMangler::mangleObjCKindOfType - use castAs<> instead of getAs<> to avoid dereference of nullptr

[Simon Pilgrim via cfe-commits]

Author: Simon Pilgrim
Date: 2022-02-12T20:11:21Z
New Revision: abe1bb763e3a7ce197f310afbff6112eb605136f

URL: https://github.com/llvm/llvm-project/commit/abe1bb763e3a7ce197f310afbff6112eb605136f
DIFF: https://github.com/llvm/llvm-project/commit/abe1bb763e3a7ce197f310afbff6112eb605136f.diff

LOG: [clang] MicrosoftCXXNameMangler::mangleObjCKindOfType - use castAs<> instead of getAs<> to avoid dereference of nullptr

The pointer is referenced in the mangleType call, so assert the cast is correct instead of returning nullptr

Added: 
    

Modified: 
    clang/lib/AST/MicrosoftMangle.cpp

Removed: 
    


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diff  --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index 8802b6e500a67..7329f163d12c9 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -1943,7 +1943,7 @@ void MicrosoftCXXNameMangler::mangleObjCKindOfType(const ObjCObjectType *T,
   Extra.mangleSourceName("KindOf");
   Extra.mangleType(QualType(T, 0)
                        .stripObjCKindOfType(getASTContext())
-                       ->getAs<ObjCObjectType>(),
+                       ->castAs<ObjCObjectType>(),
                    Quals, Range);
 
   mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__ObjC"});