[libunwind] [OpenMPIRBuilder] Remove wrapper function in `createTask`, `createTeams` (PR #67723)

[Johannes Doerfert via cfe-commits]

================
@@ -1523,41 +1560,31 @@ OpenMPIRBuilder::createTask(const LocationDescription &Loc,
   BasicBlock *TaskAllocaBB =
       splitBB(Builder, /*CreateBranch=*/true, "task.alloca");
 
+  InsertPointTy TaskAllocaIP =
+      InsertPointTy(TaskAllocaBB, TaskAllocaBB->begin());
+  InsertPointTy TaskBodyIP = InsertPointTy(TaskBodyBB, TaskBodyBB->begin());
+  BodyGenCB(TaskAllocaIP, TaskBodyIP);
+
   OutlineInfo OI;
   OI.EntryBB = TaskAllocaBB;
   OI.OuterAllocaBB = AllocaIP.getBlock();
   OI.ExitBB = TaskExitBB;
-  OI.PostOutlineCB = [this, Ident, Tied, Final, IfCondition,
-                      Dependencies](Function &OutlinedFn) {
-    // The input IR here looks like the following-
-    // ```
-    // func @current_fn() {
-    //   outlined_fn(%args)
-    // }
-    // func @outlined_fn(%args) { ... }
-    // ```
-    //
-    // This is changed to the following-
-    //
-    // ```
-    // func @current_fn() {
-    //   runtime_call(..., wrapper_fn, ...)
-    // }
-    // func @wrapper_fn(..., %args) {
-    //   outlined_fn(%args)
-    // }
-    // func @outlined_fn(%args) { ... }
-    // ```
 
-    // The stale call instruction will be replaced with a new call instruction
-    // for runtime call with a wrapper function.
+  // Add the thread ID argument.
+  std::stack<Instruction *> ToBeDeleted;
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jdoerfert wrote:

Why not a SmallVector, like we use everywhere else? We can reasonably guess the size to avoid dynamic allocations.

https://github.com/llvm/llvm-project/pull/67723