Fix automatic description for AnyTypeOf

    Unfortunately, this now gives a segfault if you pass it an empty list, similar to stringify. Given how fiddly this is, we should probably have a string join helper. I'll fix both of these using better tablegen helpers in a follow-up.

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PiperOrigin-RevId: 249076849

diff --git a/mlir/include/mlir/IR/OpBase.td b/mlir/include/mlir/IR/OpBase.td
index 5d17280..48c35e5 100644 (file)
--- a/mlir/include/mlir/IR/OpBase.td
+++ b/mlir/include/mlir/IR/OpBase.td
@@ -271,7 +271,7 @@ class AnyTypeOf<list<Type> allowedTypes, string description = ""> : Type<
     !if(!eq(description, ""),
         // Join all allowed types' descriptions with " or " as the description
         // if not provided during template specialization
-        !foldl(/*init*/"", /*list*/allowedTypes, prev, cur,
+        !foldl(!head(allowedTypes).description, !tail(allowedTypes), prev, cur,
                prev # " or " # cur.description),
         // Otherwise use the provided one
         description)>;