Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/lib/Transforms/IPO/BarrierNoopPass.cpp

@@ -1,47 +0,0 @@
-//===- BarrierNoopPass.cpp - A barrier pass for the pass manager ----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// NOTE: DO NOT USE THIS IF AVOIDABLE
-//
-// This pass is a nonce pass intended to allow manipulation of the implicitly
-// nesting pass manager. For example, it can be used to cause a CGSCC pass
-// manager to be closed prior to running a new collection of function passes.
-//
-// FIXME: This is a huge HACK. This should be removed when the pass manager's
-// nesting is made explicit instead of implicit.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Pass.h"
-#include "llvm/Transforms/IPO.h"
-using namespace llvm;
-
-namespace {
-/// \brief A nonce module pass used to place a barrier in a pass manager.
-///
-/// There is no mechanism for ending a CGSCC pass manager once one is started.
-/// This prevents extension points from having clear deterministic ordering
-/// when they are phrased as non-module passes.
-class BarrierNoop : public ModulePass {
-public:
-  static char ID; // Pass identification.
-
-  BarrierNoop() : ModulePass(ID) {
-    initializeBarrierNoopPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnModule(Module &M) override { return false; }
-};
-}
-
-ModulePass *llvm::createBarrierNoopPass() { return new BarrierNoop(); }
-
-char BarrierNoop::ID = 0;
-INITIALIZE_PASS(BarrierNoop, "barrier", "A No-Op Barrier Pass",
-                false, false)