[clang] [Clang] add user-level sizeless attribute (PR #71894)

Timm Baeder via cfe-commits cfe-commits at lists.llvm.org
Thu Nov 9 21:59:39 PST 2023


================
@@ -2400,7 +2402,66 @@ bool Type::isWebAssemblyTableType() const {
   return false;
 }
 
-bool Type::isSizelessType() const { return isSizelessBuiltinType(); }
+bool Type::isSizelessType() const {
+  // Check if this type or any of its constituents are sizeless, due to
+  // being a builtin type or individually having the user attribute.
+  // As structs can be recursive, we iterate through without repeats.
+  SmallVector<const Type *, 1> todo = {this};
----------------
tbaederr wrote:

```suggestion
  SmallVector<const Type *, 1> Todo = {this};
```

https://github.com/llvm/llvm-project/pull/71894


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