[clang] [clang-tools-extra] [Clang] Make the SizeType, SignedSizeType and PtrdiffType be named sugar types instead of built-in types (PR #143653)

[via cfe-commits]

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@@ -1567,6 +1567,8 @@ class ASTContext : public RefCountedBase<ASTContext> {
   /// and bit count.
   QualType getDependentBitIntType(bool Unsigned, Expr *BitsExpr) const;
 
+  QualType getPredefinedSugarType(uint32_t KD) const;
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YexuanXiao wrote:

This function is used by TypeProperties.td and may not support enums, similar to other definitions in same file. I recall attempting to use enums before but failing.

https://github.com/llvm/llvm-project/pull/143653