[clang] [llvm] [mlir] [OMPIRBuilder] - Handle dependencies in `createTarget` (PR #93977)

[Kareem Ergawy via cfe-commits]

================
@@ -5212,6 +5273,78 @@ static Function *createOutlinedFunction(
   return Func;
 }
 
+// Create an entry point for a target task with the following.
+// It'll have the following signature
+// void @.omp_target_task_proxy_func(i32 %thread.id, ptr %task)
+// This function is called from emitTargetTask once the
+// code to launch the target kernel has been outlined already.
+static Function *emitProxyTaskFunction(OpenMPIRBuilder &OMPBuilder,
+                                       IRBuilderBase &Builder,
+                                       CallInst *StaleCI) {
+  Module &M = OMPBuilder.M;
+  // CalledFunction is the target launch function, i.e.
+  // the function that sets up kernel arguments and calls
+  // __tgt_target_kernel to launch the kernel on the device.
+  Function *CalledFunction = StaleCI->getCalledFunction();
----------------
ergawy wrote:

nit:
```suggestion
  Function *KernelLaunchFunction = StaleCI->getCalledFunction();
```

https://github.com/llvm/llvm-project/pull/93977