Allow using P/Invoke helpers for IL stubs (#113824)

Author: filipnavara

src/coreclr/jit/lower.cpp

@@ -5943,7 +5943,7 @@ void Lowering::InsertPInvokeMethodProlog()
     noway_assert(comp->info.compUnmanagedCallCountWithGCTransition);
     noway_assert(comp->lvaInlinedPInvokeFrameVar != BAD_VAR_NUM);
 
-    if (comp->opts.ShouldUsePInvokeHelpers())
+    if (!comp->info.compPublishStubParam && comp->opts.ShouldUsePInvokeHelpers())
     {
         return;
     }
@@ -5972,6 +5972,13 @@ void Lowering::InsertPInvokeMethodProlog()
         DISPTREERANGE(firstBlockRange, store);
     }
 
+    // If we use P/Invoke helper calls then the hidden stub initialization
+    // is all we need to do. Rest will get initialized by the helper.
+    if (comp->opts.ShouldUsePInvokeHelpers())
+    {
+        return;
+    }
+
     // Call runtime helper to fill in our InlinedCallFrame and push it on the Frame list:
     //     TCB = CORINFO_HELP_INIT_PINVOKE_FRAME(&symFrameStart);
     GenTree*   frameAddr    = comp->gtNewLclVarAddrNode(comp->lvaInlinedPInvokeFrameVar);