[llvm] [mlir] [flang][OpenMP] Support `target ... nowait` (PR #111823)

[Michael Klemm via llvm-commits]

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@@ -6989,9 +6989,14 @@ OpenMPIRBuilder::InsertPointTy OpenMPIRBuilder::emitTargetTask(
         getOrCreateSrcLocStr(LocationDescription(Builder), SrcLocStrSize);
     Value *Ident = getOrCreateIdent(SrcLocStr, SrcLocStrSize);
 
-    // @__kmpc_omp_task_alloc
+    // @__kmpc_omp_task_alloc or @__kmpc_omp_target_task_alloc
+    //
+    // If `HasNoWait == true`, we call  @__kmpc_omp_target_task_alloc to provide
+    // the DeviceID to the deferred task.
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mjklemm wrote:

Looking at the OpenMP runtime code, handling `untied` is in the runtime in the `__kmpc_omp_target_task_alloc` entry point.

https://github.com/llvm/llvm-project/pull/111823