[clang] [clang] Fix size and alignment of packed sub-byte integer vectors (PR #161796)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- clang/include/clang/AST/ASTContext.h clang/include/clang/AST/TypeBase.h clang/lib/AST/ASTContext.cpp clang/lib/AST/ExprConstant.cpp clang/test/CodeGenCXX/ext-int.cpp clang/test/CodeGenCXX/matrix-vector-bit-int.cpp clang/test/SemaCXX/constexpr-builtin-bit-cast.cpp clang/test/SemaCXX/ext-int.cpp
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``````````diff
diff --git a/clang/include/clang/AST/TypeBase.h b/clang/include/clang/AST/TypeBase.h
index 3d904c71b..d3a95bd88 100644
--- a/clang/include/clang/AST/TypeBase.h
+++ b/clang/include/clang/AST/TypeBase.h
@@ -2637,7 +2637,7 @@ public:
   bool isVectorType() const;                    // GCC vector type.
   bool isExtVectorType() const;                 // Extended vector type.
   bool isExtVectorBoolType() const;             // Extended vector type with bool element.
-  bool isBitIntVectorType() const;              // Vector type with _BitInt element.
+  bool isBitIntVectorType() const; // Vector type with _BitInt element.
   // Extended vector type with bool element that is packed. HLSL doesn't pack
   // its bool vectors.
   bool isPackedVectorBoolType(const ASTContext &ctx) const;

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https://github.com/llvm/llvm-project/pull/161796