tqchen commented on PR #18172:
URL: https://github.com/apache/tvm/pull/18172#issuecomment-3132330099
Note for upgrading, typically for object, we need to
- Add `TVMFFISEqHashKind`, the most typical one would be
`kTVMFFISEqHashKindTreeNode`
- For AST that may defines a variable, add
`refl::AttachFieldFlag::SEqHashIgnore()` in extra of field def
- For fields that needs to be ignored, attach
`refl::AttachFieldFlag::SEqHashIgnore()`
It is also possible to define custom s_equal/reduce, see module.h for an
example
Some examples
```c++
/*! \brief range over one dimension */
class RangeNode : public Object {
public:
/*! \brief beginning of the node */
PrimExpr min;
/*! \brief the extend of range */
PrimExpr extent;
/*! \brief the location of this range in the source */
mutable Span span;
/*! \brief constructor */
RangeNode() {}
RangeNode(PrimExpr min, PrimExpr extent, Span span = Span())
: min(min), extent(extent), span(span) {}
static void RegisterReflection() {
namespace refl = tvm::ffi::reflection;
refl::ObjectDef<RangeNode>()
.def_ro("min", &RangeNode::min)
.def_ro("extent", &RangeNode::extent)
.def_ro("span", &RangeNode::span,
refl::AttachFieldFlag::SEqHashIgnore());
}
static constexpr const char* _type_key = "ir.Range";
static constexpr TVMFFISEqHashKind _type_s_eq_hash_kind =
kTVMFFISEqHashKindTreeNode;
TVM_DECLARE_FINAL_OBJECT_INFO(RangeNode, Object);
};
```
```c++
class TFuncObj : public Object {
public:
Array<TVar> params;
Array<ObjectRef> body;
String comment;
TFuncObj(Array<TVar> params, Array<ObjectRef> body, String comment)
: params(params), body(body), comment(comment) {}
static void RegisterReflection() {
namespace refl = tvm::ffi::reflection;
refl::ObjectDef<TFuncObj>()
.def_ro("params", &TFuncObj::params,
refl::AttachFieldFlag::SEqHashDef())
.def_ro("body", &TFuncObj::body)
.def_ro("comment", &TFuncObj::comment,
refl::AttachFieldFlag::SEqHashIgnore());
}
static constexpr const char* _type_key = "test.Func";
static constexpr TVMFFISEqHashKind _type_s_eq_hash_kind =
kTVMFFISEqHashKindTreeNode;
TVM_FFI_DECLARE_FINAL_OBJECT_INFO(TFuncObj, Object);
};
```
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