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

[via llvm-commits]

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@@ -425,4 +426,59 @@ def mif_TeamNumberOp : mif_Op<"team_number", []> {
   }];
 }
 
+//===----------------------------------------------------------------------===//
+// Allocation and Deallocation
+//===----------------------------------------------------------------------===//
+
+def mif_AllocCoarrayOp
+    : mif_Op<"alloc_coarray", [AttrSizedOperandSegments,
+                               MemoryEffects<[MemAlloc<DefaultResource>]>]> {
+  let summary = "Perform the allocation of a coarray and provide a "
+                "corresponding coarray descriptor";
+
+  let description = [{
+    This operation allocates a coarray and provides the corresponding 
+    coarray descriptor. This call is collective over the current team.
+  }];
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jeanPerier wrote:

Is it also in chare of derived type initialization (and setting up pointer/allocatable components to nullptrs)?

While this PR leaves coarray source allocation as a TODO and that is fine with me, do you have an idea of how this will be done?

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