[mlir] Migrate away from PointerUnion::{is,get} (NFC) (#122591)

Note that PointerUnion::{is,get} have been soft deprecated in
PointerUnion.h:

  // FIXME: Replace the uses of is(), get() and dyn_cast() with
  //        isa<T>, cast<T> and the llvm::dyn_cast<T>

I'm not touching PointerUnion::dyn_cast for now because it's a bit
complicated; we could blindly migrate it to dyn_cast_if_present, but
we should probably use dyn_cast when the operand is known to be
non-null.

1 files changed, 2 insertions, 2 deletions

diff --git a/mlir/lib/Bytecode/Writer/IRNumbering.h b/mlir/lib/Bytecode/Writer/IRNumbering.h
index eab75f50d2ee..9b7ac0d3688e 100644
--- a/mlir/lib/Bytecode/Writer/IRNumbering.h
+++ b/mlir/lib/Bytecode/Writer/IRNumbering.h
@@ -50,11 +50,11 @@ struct AttrTypeNumbering {
 };
 struct AttributeNumbering : public AttrTypeNumbering {
   AttributeNumbering(Attribute value) : AttrTypeNumbering(value) {}
-  Attribute getValue() const { return value.get<Attribute>(); }
+  Attribute getValue() const { return cast<Attribute>(value); }
 };
 struct TypeNumbering : public AttrTypeNumbering {
   TypeNumbering(Type value) : AttrTypeNumbering(value) {}
-  Type getValue() const { return value.get<Type>(); }
+  Type getValue() const { return cast<Type>(value); }
 };
 
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