[llvm] [flang][runtime] Remove bad runtime assertion (PR #134176)

[Peter Klausler via llvm-commits]

https://github.com/klausler created https://github.com/llvm/llvm-project/pull/134176

The RUNTIME_CHECK in question doesn't allow for the possibility that an allocatable or pointer component could be processed by defined I/O.  Remove it in favor of a dynamic allocation check.

>From 56ac14f870e6873eb4621d28ea96726e782d1a7b Mon Sep 17 00:00:00 2001
From: Peter Klausler <pklausler at nvidia.com>
Date: Wed, 2 Apr 2025 16:37:45 -0700
Subject: [PATCH] [flang][runtime] Remove bad runtime assertion

The RUNTIME_CHECK in question doesn't allow for the possibility
that an allocatable or pointer component could be processed by
defined I/O.  Remove it in favor of a dynamic allocation check.
---
 flang-rt/lib/runtime/descriptor-io.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/flang-rt/lib/runtime/descriptor-io.h b/flang-rt/lib/runtime/descriptor-io.h
index dd399164325cb..eb60f106c9203 100644
--- a/flang-rt/lib/runtime/descriptor-io.h
+++ b/flang-rt/lib/runtime/descriptor-io.h
@@ -263,10 +263,8 @@ static RT_API_ATTRS bool DefaultComponentIO(IoStatementState &io,
     // Component is itself a descriptor
     char *pointer{
         origDescriptor.Element<char>(origSubscripts) + component.offset()};
-    RUNTIME_CHECK(
-        terminator, component.genre() == typeInfo::Component::Genre::Automatic);
     const Descriptor &compDesc{*reinterpret_cast<const Descriptor *>(pointer)};
-    return DescriptorIO<DIR>(io, compDesc, table);
+    return compDesc.IsAllocated() && DescriptorIO<DIR>(io, compDesc, table);
   }
 #else
   terminator.Crash("not yet implemented: component IO");