fixup! [mlir][LLVMIR] Add IFuncOp to LLVM dialect

Author: Jezurko

mlir/test/Dialect/LLVMIR/invalid.mlir

@@ -1945,6 +1945,16 @@ llvm.mlir.ifunc external @foo : !llvm.func<void (ptr, i32)>, !llvm.ptr @resolve_
 
 // -----
 
-llvm.mlir.global external @resolve_foo() : !llvm.ptr
+llvm.func external @resolve_foo() -> !llvm.ptr
 // expected-error@+1 {{'llvm.mlir.ifunc' op 'common' linkage not supported in ifuncs}}
 llvm.mlir.ifunc common @foo : !llvm.func<void (ptr, i32)>, !llvm.ptr @resolve_foo {dso_local}
+
+// -----
+
+llvm.mlir.global external @resolve_foo() : !llvm.ptr
+llvm.mlir.alias external @alias_resolver : !llvm.ptr {
+  %0 = llvm.mlir.addressof @resolve_foo : !llvm.ptr
+  llvm.return %0 : !llvm.ptr
+}
+// expected-error@+1 {{'llvm.mlir.ifunc' op must have a function resolver}}
+llvm.mlir.ifunc external @foo : !llvm.func<void (ptr, i32)>, !llvm.ptr @alias_resolver {dso_local}