1 files changed, 46 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index bb2dda980e4..9137c836caa 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -320,8 +320,45 @@ bool MachineOperand::isIdenticalTo(const MachineOperand &Other) const {
   }
   case MachineOperand::MO_MCSymbol:
     return getMCSymbol() == Other.getMCSymbol();
-  case MachineOperand::MO_CFIIndex:
-    return getCFIIndex() == Other.getCFIIndex();
+  case MachineOperand::MO_CFIIndex: {
+    const MachineFunction *MF = getParent()->getParent()->getParent();
+    const MachineFunction *OtherMF =
+        Other.getParent()->getParent()->getParent();
+    MCCFIInstruction Inst = MF->getFrameInstructions()[getCFIIndex()];
+    MCCFIInstruction OtherInst =
+        OtherMF->getFrameInstructions()[Other.getCFIIndex()];
+    MCCFIInstruction::OpType op = Inst.getOperation();
+    if (op != OtherInst.getOperation()) return false;
+    switch (op) {
+    case MCCFIInstruction::OpDefCfa:
+    case MCCFIInstruction::OpOffset:
+    case MCCFIInstruction::OpRelOffset:
+      if (Inst.getRegister() != OtherInst.getRegister()) return false;
+      if (Inst.getOffset() != OtherInst.getOffset()) return false;
+      break;
+    case MCCFIInstruction::OpRestore:
+    case MCCFIInstruction::OpUndefined:
+    case MCCFIInstruction::OpSameValue:
+    case MCCFIInstruction::OpDefCfaRegister:
+      if (Inst.getRegister() != OtherInst.getRegister()) return false;
+      break;
+    case MCCFIInstruction::OpRegister:
+      if (Inst.getRegister() != OtherInst.getRegister()) return false;
+      if (Inst.getRegister2() != OtherInst.getRegister2()) return false;
+      break;
+    case MCCFIInstruction::OpDefCfaOffset:
+    case MCCFIInstruction::OpAdjustCfaOffset:
+    case MCCFIInstruction::OpGnuArgsSize:
+      if (Inst.getOffset() != OtherInst.getOffset()) return false;
+      break;
+    case MCCFIInstruction::OpRememberState:
+    case MCCFIInstruction::OpRestoreState:
+    case MCCFIInstruction::OpEscape:
+    case MCCFIInstruction::OpWindowSave:
+      break;
+    }
+    return true;
+  }
   case MachineOperand::MO_Metadata:
     return getMetadata() == Other.getMetadata();
   case MachineOperand::MO_IntrinsicID:
@@ -370,8 +407,13 @@ hash_code llvm::hash_value(const MachineOperand &MO) {
     return hash_combine(MO.getType(), MO.getTargetFlags(), MO.getMetadata());
   case MachineOperand::MO_MCSymbol:
     return hash_combine(MO.getType(), MO.getTargetFlags(), MO.getMCSymbol());
-  case MachineOperand::MO_CFIIndex:
-    return hash_combine(MO.getType(), MO.getTargetFlags(), MO.getCFIIndex());
+  case MachineOperand::MO_CFIIndex: {
+    const MachineFunction *MF = MO.getParent()->getParent()->getParent();
+    MCCFIInstruction Inst = MF->getFrameInstructions()[MO.getCFIIndex()];
+    return hash_combine(MO.getType(), MO.getTargetFlags(), Inst.getOperation(),
+                        Inst.getRegister(), Inst.getRegister2(),
+                        Inst.getOffset());
+  }
   case MachineOperand::MO_IntrinsicID:
     return hash_combine(MO.getType(), MO.getTargetFlags(), MO.getIntrinsicID());
   case MachineOperand::MO_Predicate: