| [mlir] Prevent SubElementInterface from going into infinite recursion Since only mutable types and attributes can go into infinite recursion inside SubElementInterface::walkSubElement, and there are only a few of them (mutable types and attributes), we introduce new traits for Type and Attribute: TypeTrait::IsMutable and AttributeTrait::IsMutable, respectively. They indicate whether a type or attribute is mutable. Such traits are required if the ImplType defines a mutate function. Then, inside SubElementInterface, we use a set to record visited mutable types and attributes that have been visited before. Differential Revision: https://reviews.llvm.org/D127537 | 3 年前 |