Index: llvm/include/llvm/CodeGen/TargetInstrInfo.h
===================================================================
--- llvm/include/llvm/CodeGen/TargetInstrInfo.h
+++ llvm/include/llvm/CodeGen/TargetInstrInfo.h
@@ -612,6 +612,13 @@
     llvm_unreachable("target did not implement");
   }
 
+  /// Analyze a basic block \p Block and its instructions and tell if it
+  /// is profitable to move it up in the final layout of a function. Some
+  /// hardware loop instructions can work better with backward branches.
+  virtual bool isProfitableToMoveUp(const MachineBasicBlock *Block) const {
+    return true;
+  }
+
   /// Analyze the branching code at the end of MBB, returning
   /// true if it cannot be understood (e.g. it's a switch dispatch or isn't
   /// implemented for a target).  Upon success, this returns false and returns
Index: llvm/lib/CodeGen/MachineBlockPlacement.cpp
===================================================================
--- llvm/lib/CodeGen/MachineBlockPlacement.cpp
+++ llvm/lib/CodeGen/MachineBlockPlacement.cpp
@@ -1907,6 +1907,10 @@
 MachineBlockPlacement::canMoveBottomBlockToTop(
     const MachineBasicBlock *BottomBlock,
     const MachineBasicBlock *OldTop) {
+
+  if (!TII->isProfitableToMoveUp(BottomBlock))
+    return false;
+
   if (BottomBlock->pred_size() != 1)
     return true;
   MachineBasicBlock *Pred = *BottomBlock->pred_begin();