1 files changed, 0 insertions, 59 deletions
diff --git a/contrib/llvm/lib/CodeGen/PHIEliminationUtils.cpp b/contrib/llvm/lib/CodeGen/PHIEliminationUtils.cpp
deleted file mode 100644
index 3a2cdaf3bd3c..000000000000
--- a/contrib/llvm/lib/CodeGen/PHIEliminationUtils.cpp
+++ /dev/null
@@ -1,59 +0,0 @@
-//===-- PHIEliminationUtils.cpp - Helper functions for PHI elimination ----===//
-//
-// 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 "PHIEliminationUtils.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/CodeGen/MachineBasicBlock.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineRegisterInfo.h"
-using namespace llvm;
-
-// findCopyInsertPoint - Find a safe place in MBB to insert a copy from SrcReg
-// when following the CFG edge to SuccMBB. This needs to be after any def of
-// SrcReg, but before any subsequent point where control flow might jump out of
-// the basic block.
-MachineBasicBlock::iterator
-llvm::findPHICopyInsertPoint(MachineBasicBlock* MBB, MachineBasicBlock* SuccMBB,
-                             unsigned SrcReg) {
-  // Handle the trivial case trivially.
-  if (MBB->empty())
-    return MBB->begin();
-
-  // Usually, we just want to insert the copy before the first terminator
-  // instruction. However, for the edge going to a landing pad, we must insert
-  // the copy before the call/invoke instruction.
-  if (!SuccMBB->isEHPad())
-    return MBB->getFirstTerminator();
-
-  // Discover any defs/uses in this basic block.
-  SmallPtrSet<MachineInstr*, 8> DefUsesInMBB;
-  MachineRegisterInfo& MRI = MBB->getParent()->getRegInfo();
-  for (MachineInstr &RI : MRI.reg_instructions(SrcReg)) {
-    if (RI.getParent() == MBB)
-      DefUsesInMBB.insert(&RI);
-  }
-
-  MachineBasicBlock::iterator InsertPoint;
-  if (DefUsesInMBB.empty()) {
-    // No defs.  Insert the copy at the start of the basic block.
-    InsertPoint = MBB->begin();
-  } else if (DefUsesInMBB.size() == 1) {
-    // Insert the copy immediately after the def/use.
-    InsertPoint = *DefUsesInMBB.begin();
-    ++InsertPoint;
-  } else {
-    // Insert the copy immediately after the last def/use.
-    InsertPoint = MBB->end();
-    while (!DefUsesInMBB.count(&*--InsertPoint)) {}
-    ++InsertPoint;
-  }
-
-  // Make sure the copy goes after any phi nodes but before
-  // any debug nodes.
-  return MBB->SkipPHIsAndLabels(InsertPoint);
-}