[flang] [llvm] [Flang] Adding lowering for the allocation and deallocation of coarrays (PR #182110)

[Dan Bonachea via llvm-commits]

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@@ -0,0 +1,45 @@
+//===-- runtime/coarray.cpp -----------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "flang/Runtime/coarray.h"
+#include "flang-rt/runtime/descriptor.h"
+#include "flang-rt/runtime/terminator.h"
+#include "flang-rt/runtime/type-info.h"
+
+namespace Fortran::runtime {
+
+extern "C" {
+RT_EXT_API_GROUP_BEGIN
+
+void RTDEF(ComputeLastUcobound)(
+    int num_images, const Descriptor &lcobounds, const Descriptor &ucobounds) {
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bonachea wrote:

I'll mention for the benefit of other reviewers: 

This PR has made us realize the allocation calling convention for trailing ucobound is inelegant (and inefficient). We are currently working towards a PRIF extension that would obviate the need for this runtime function, but that's not quite ready yet.

https://github.com/llvm/llvm-project/pull/182110