1 files changed, 0 insertions, 76 deletions
diff --git a/contrib/llvm/lib/CodeGen/LoopTraversal.cpp b/contrib/llvm/lib/CodeGen/LoopTraversal.cpp
deleted file mode 100644
index 9490dfc40a82..000000000000
--- a/contrib/llvm/lib/CodeGen/LoopTraversal.cpp
+++ /dev/null
@@ -1,76 +0,0 @@
-//===- LoopTraversal.cpp - Optimal basic block traversal order --*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/LoopTraversal.h"
-#include "llvm/ADT/PostOrderIterator.h"
-#include "llvm/CodeGen/MachineFunction.h"
-
-using namespace llvm;
-
-bool LoopTraversal::isBlockDone(MachineBasicBlock *MBB) {
-  unsigned MBBNumber = MBB->getNumber();
-  assert(MBBNumber < MBBInfos.size() && "Unexpected basic block number.");
-  return MBBInfos[MBBNumber].PrimaryCompleted &&
-         MBBInfos[MBBNumber].IncomingCompleted ==
-             MBBInfos[MBBNumber].PrimaryIncoming &&
-         MBBInfos[MBBNumber].IncomingProcessed == MBB->pred_size();
-}
-
-LoopTraversal::TraversalOrder LoopTraversal::traverse(MachineFunction &MF) {
-  // Initialize the MMBInfos
-  MBBInfos.assign(MF.getNumBlockIDs(), MBBInfo());
-
-  MachineBasicBlock *Entry = &*MF.begin();
-  ReversePostOrderTraversal<MachineBasicBlock *> RPOT(Entry);
-  SmallVector<MachineBasicBlock *, 4> Workqueue;
-  SmallVector<TraversedMBBInfo, 4> MBBTraversalOrder;
-  for (MachineBasicBlock *MBB : RPOT) {
-    // N.B: IncomingProcessed and IncomingCompleted were already updated while
-    // processing this block's predecessors.
-    unsigned MBBNumber = MBB->getNumber();
-    assert(MBBNumber < MBBInfos.size() && "Unexpected basic block number.");
-    MBBInfos[MBBNumber].PrimaryCompleted = true;
-    MBBInfos[MBBNumber].PrimaryIncoming = MBBInfos[MBBNumber].IncomingProcessed;
-    bool Primary = true;
-    Workqueue.push_back(MBB);
-    while (!Workqueue.empty()) {
-      MachineBasicBlock *ActiveMBB = &*Workqueue.back();
-      Workqueue.pop_back();
-      bool Done = isBlockDone(ActiveMBB);
-      MBBTraversalOrder.push_back(TraversedMBBInfo(ActiveMBB, Primary, Done));
-      for (MachineBasicBlock *Succ : ActiveMBB->successors()) {
-        unsigned SuccNumber = Succ->getNumber();
-        assert(SuccNumber < MBBInfos.size() &&
-               "Unexpected basic block number.");
-        if (!isBlockDone(Succ)) {
-          if (Primary)
-            MBBInfos[SuccNumber].IncomingProcessed++;
-          if (Done)
-            MBBInfos[SuccNumber].IncomingCompleted++;
-          if (isBlockDone(Succ))
-            Workqueue.push_back(Succ);
-        }
-      }
-      Primary = false;
-    }
-  }
-
-  // We need to go through again and finalize any blocks that are not done yet.
-  // This is possible if blocks have dead predecessors, so we didn't visit them
-  // above.
-  for (MachineBasicBlock *MBB : RPOT) {
-    if (!isBlockDone(MBB))
-      MBBTraversalOrder.push_back(TraversedMBBInfo(MBB, false, true));
-    // Don't update successors here. We'll get to them anyway through this
-    // loop.
-  }
-
-  MBBInfos.clear();
-
-  return MBBTraversalOrder;
-}