diff --git a/src/builtins/builtins-definitions.h b/src/builtins/builtins-definitions.h
index 5f195ab6a6..2705f29336 100644
--- a/src/builtins/builtins-definitions.h
+++ b/src/builtins/builtins-definitions.h
@@ -702,6 +702,8 @@ namespace internal {
   TFC(SameValue, Compare, 1)                                                   \
   TFC(StrictEqual, Compare, 1)                                                 \
   TFS(BitwiseNot, kValue)                                                      \
+  TFS(Decrement, kValue)                                                       \
+  TFS(Increment, kValue)                                                       \
   TFS(Negate, kValue)                                                          \
                                                                                \
   /* Object */                                                                 \
diff --git a/src/builtins/builtins-number-gen.cc b/src/builtins/builtins-number-gen.cc
index 2ea9b7bffd..23dc0f813a 100644
--- a/src/builtins/builtins-number-gen.cc
+++ b/src/builtins/builtins-number-gen.cc
@@ -771,6 +771,45 @@ TF_BUILTIN(BitwiseNot, NumberBuiltinsAssembler) {
   }
 }
 
+TF_BUILTIN(Decrement, NumberBuiltinsAssembler) {
+  Node* context = Parameter(Descriptor::kContext);
+  VARIABLE(var_input, MachineRepresentation::kTagged);
+  Label do_number(this), do_bigint(this);
+
+  UnaryOp<Descriptor>(&var_input, &do_number, &do_number, nullptr, &do_bigint);
+
+  BIND(&do_number);
+  {
+    TailCallBuiltin(Builtins::kSubtract, context, var_input.value(),
+                    SmiConstant(1));
+  }
+
+  BIND(&do_bigint);
+  {
+    Return(CallRuntime(Runtime::kBigIntUnaryOp, context, var_input.value(),
+                       SmiConstant(Operation::kDecrement)));
+  }
+}
+
+TF_BUILTIN(Increment, NumberBuiltinsAssembler) {
+  Node* context = Parameter(Descriptor::kContext);
+  VARIABLE(var_input, MachineRepresentation::kTagged);
+  Label do_number(this), do_bigint(this);
+
+  UnaryOp<Descriptor>(&var_input, &do_number, &do_number, nullptr, &do_bigint);
+
+  BIND(&do_number);
+  {
+    TailCallBuiltin(Builtins::kAdd, context, var_input.value(), SmiConstant(1));
+  }
+
+  BIND(&do_bigint);
+  {
+    Return(CallRuntime(Runtime::kBigIntUnaryOp, context, var_input.value(),
+                       SmiConstant(Operation::kIncrement)));
+  }
+}
+
 TF_BUILTIN(Negate, NumberBuiltinsAssembler) {
   VARIABLE(var_input, MachineRepresentation::kTagged);
   VARIABLE(var_input_double, MachineRepresentation::kFloat64);
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index 7569d407c0..523448573d 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -2015,6 +2015,27 @@ void BytecodeGraphBuilder::VisitThrowSuperAlreadyCalledIfNotHole() {
                          Runtime::kThrowSuperAlreadyCalledError);
 }
 
+void BytecodeGraphBuilder::BuildUnaryOp(const Operator* op) {
+  PrepareEagerCheckpoint();
+  Node* operand = environment()->LookupAccumulator();
+
+  FeedbackSlot slot = feedback_vector()->ToSlot(
+      bytecode_iterator().GetIndexOperand(kUnaryOperationHintIndex));
+  JSTypeHintLowering::LoweringResult lowering =
+      TryBuildSimplifiedUnaryOp(op, operand, slot);
+  if (lowering.IsExit()) return;
+
+  Node* node = nullptr;
+  if (lowering.IsSideEffectFree()) {
+    node = lowering.value();
+  } else {
+    DCHECK(!lowering.Changed());
+    node = NewNode(op, operand);
+  }
+
+  environment()->BindAccumulator(node, Environment::kAttachFrameState);
+}
+
 void BytecodeGraphBuilder::BuildBinaryOp(const Operator* op) {
   PrepareEagerCheckpoint();
   Node* left =
@@ -2084,48 +2105,19 @@ CallFrequency BytecodeGraphBuilder::ComputeCallFrequency(int slot_id) const {
 }
 
 void BytecodeGraphBuilder::VisitBitwiseNot() {
-  // TODO(neis): Define a BuildUnaryOp helper function.
-  PrepareEagerCheckpoint();
+  BuildUnaryOp(javascript()->BitwiseNot());
+}
 
-  FeedbackSlot slot = feedback_vector()->ToSlot(
-      bytecode_iterator().GetIndexOperand(kUnaryOperationHintIndex));
-  const Operator* op = javascript()->BitwiseNot();
-  Node* operand = environment()->LookupAccumulator();
+void BytecodeGraphBuilder::VisitDec() {
+  BuildUnaryOp(javascript()->Decrement());
+}
 
-  JSTypeHintLowering::LoweringResult lowering =
-      TryBuildSimplifiedUnaryOp(op, operand, slot);
-  if (lowering.IsExit()) return;
-  Node* node = nullptr;
-  if (lowering.IsSideEffectFree()) {
-    node = lowering.value();
-  } else {
-    DCHECK(!lowering.Changed());
-    node = NewNode(op, operand);
-  }
-
-  environment()->BindAccumulator(node, Environment::kAttachFrameState);
+void BytecodeGraphBuilder::VisitInc() {
+  BuildUnaryOp(javascript()->Increment());
 }
 
 void BytecodeGraphBuilder::VisitNegate() {
-  PrepareEagerCheckpoint();
-
-  FeedbackSlot slot = feedback_vector()->ToSlot(
-      bytecode_iterator().GetIndexOperand(kUnaryOperationHintIndex));
-  const Operator* op = javascript()->Negate();
-  Node* operand = environment()->LookupAccumulator();
-
-  JSTypeHintLowering::LoweringResult lowering =
-      TryBuildSimplifiedUnaryOp(op, operand, slot);
-  if (lowering.IsExit()) return;
-  Node* node = nullptr;
-  if (lowering.IsSideEffectFree()) {
-    node = lowering.value();
-  } else {
-    DCHECK(!lowering.Changed());
-    node = NewNode(op, operand);
-  }
-
-  environment()->BindAccumulator(node, Environment::kAttachFrameState);
+  BuildUnaryOp(javascript()->Negate());
 }
 
 void BytecodeGraphBuilder::VisitAdd() {
@@ -2237,52 +2229,6 @@ void BytecodeGraphBuilder::VisitShiftRightLogicalSmi() {
   BuildBinaryOpWithImmediate(javascript()->ShiftRightLogical());
 }
 
-void BytecodeGraphBuilder::VisitInc() {
-  PrepareEagerCheckpoint();
-  // Note: Use subtract -1 here instead of add 1 to ensure we always convert to
-  // a number, not a string.
-  Node* left = environment()->LookupAccumulator();
-  Node* right = jsgraph()->Constant(-1);
-  const Operator* op = javascript()->Subtract();
-
-  FeedbackSlot slot = feedback_vector()->ToSlot(
-      bytecode_iterator().GetIndexOperand(kCountOperationHintIndex));
-  JSTypeHintLowering::LoweringResult lowering =
-      TryBuildSimplifiedBinaryOp(op, left, right, slot);
-  if (lowering.IsExit()) return;
-
-  Node* node = nullptr;
-  if (lowering.IsSideEffectFree()) {
-    node = lowering.value();
-  } else {
-    DCHECK(!lowering.Changed());
-    node = NewNode(op, left, right);
-  }
-  environment()->BindAccumulator(node, Environment::kAttachFrameState);
-}
-
-void BytecodeGraphBuilder::VisitDec() {
-  PrepareEagerCheckpoint();
-  Node* left = environment()->LookupAccumulator();
-  Node* right = jsgraph()->OneConstant();
-  const Operator* op = javascript()->Subtract();
-
-  FeedbackSlot slot = feedback_vector()->ToSlot(
-      bytecode_iterator().GetIndexOperand(kCountOperationHintIndex));
-  JSTypeHintLowering::LoweringResult lowering =
-      TryBuildSimplifiedBinaryOp(op, left, right, slot);
-  if (lowering.IsExit()) return;
-
-  Node* node = nullptr;
-  if (lowering.IsSideEffectFree()) {
-    node = lowering.value();
-  } else {
-    DCHECK(!lowering.Changed());
-    node = NewNode(op, left, right);
-  }
-  environment()->BindAccumulator(node, Environment::kAttachFrameState);
-}
-
 void BytecodeGraphBuilder::VisitLogicalNot() {
   Node* value = environment()->LookupAccumulator();
   Node* node = NewNode(simplified()->BooleanNot(), value);
diff --git a/src/compiler/bytecode-graph-builder.h b/src/compiler/bytecode-graph-builder.h
index 737fb52a81..562c3ddaea 100644
--- a/src/compiler/bytecode-graph-builder.h
+++ b/src/compiler/bytecode-graph-builder.h
@@ -171,6 +171,7 @@ class BytecodeGraphBuilder {
                  std::initializer_list<Node*> args, int slot_id) {
     BuildCall(receiver_mode, args.begin(), args.size(), slot_id);
   }
+  void BuildUnaryOp(const Operator* op);
   void BuildBinaryOp(const Operator* op);
   void BuildBinaryOpWithImmediate(const Operator* op);
   void BuildCompareOp(const Operator* op);
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index 3e75a4afab..e89ea28bbd 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -71,6 +71,8 @@ REPLACE_STUB_CALL(LessThanOrEqual)
 REPLACE_STUB_CALL(GreaterThan)
 REPLACE_STUB_CALL(GreaterThanOrEqual)
 REPLACE_STUB_CALL(BitwiseNot)
+REPLACE_STUB_CALL(Decrement)
+REPLACE_STUB_CALL(Increment)
 REPLACE_STUB_CALL(Negate)
 REPLACE_STUB_CALL(HasProperty)
 REPLACE_STUB_CALL(Equal)
diff --git a/src/compiler/js-operator.cc b/src/compiler/js-operator.cc
index 13abf20dc6..d53dd52e59 100644
--- a/src/compiler/js-operator.cc
+++ b/src/compiler/js-operator.cc
@@ -578,6 +578,8 @@ CompareOperationHint CompareOperationHintOf(const Operator* op) {
   V(Divide, Operator::kNoProperties, 2, 1)                      \
   V(Modulus, Operator::kNoProperties, 2, 1)                     \
   V(BitwiseNot, Operator::kNoProperties, 1, 1)                  \
+  V(Decrement, Operator::kNoProperties, 1, 1)                   \
+  V(Increment, Operator::kNoProperties, 1, 1)                   \
   V(Negate, Operator::kNoProperties, 1, 1)                      \
   V(ToInteger, Operator::kNoProperties, 1, 1)                   \
   V(ToLength, Operator::kNoProperties, 1, 1)                    \
diff --git a/src/compiler/js-operator.h b/src/compiler/js-operator.h
index 50d1fcae98..97eeac598c 100644
--- a/src/compiler/js-operator.h
+++ b/src/compiler/js-operator.h
@@ -653,6 +653,8 @@ class V8_EXPORT_PRIVATE JSOperatorBuilder final
   const Operator* Modulus();
 
   const Operator* BitwiseNot();
+  const Operator* Decrement();
+  const Operator* Increment();
   const Operator* Negate();
 
   const Operator* ToInteger();
diff --git a/src/compiler/js-type-hint-lowering.cc b/src/compiler/js-type-hint-lowering.cc
index de6e712580..9318612f16 100644
--- a/src/compiler/js-type-hint-lowering.cc
+++ b/src/compiler/js-type-hint-lowering.cc
@@ -234,6 +234,25 @@ JSTypeHintLowering::LoweringResult JSTypeHintLowering::ReduceUnaryOperation(
       node = b.TryBuildNumberBinop();
       break;
     }
+    case IrOpcode::kJSDecrement: {
+      // Lower to a speculative subtraction of 1 if we have some kind of Number
+      // feedback.
+      JSSpeculativeBinopBuilder b(this, jsgraph()->javascript()->Subtract(),
+                                  operand, jsgraph()->SmiConstant(1), effect,
+                                  control, slot);
+      node = b.TryBuildNumberBinop();
+      break;
+    }
+    case IrOpcode::kJSIncrement: {
+      // Lower to a speculative addition of 1 if we have some kind of Number
+      // feedback.
+      BinaryOperationHint hint = BinaryOperationHint::kAny;  // Dummy.
+      JSSpeculativeBinopBuilder b(this, jsgraph()->javascript()->Add(hint),
+                                  operand, jsgraph()->SmiConstant(1), effect,
+                                  control, slot);
+      node = b.TryBuildNumberBinop();
+      break;
+    }
     case IrOpcode::kJSNegate: {
       // Lower to a speculative multiplication with -1 if we have some kind of
       // Number feedback.
diff --git a/src/compiler/js-typed-lowering.cc b/src/compiler/js-typed-lowering.cc
index 3c0d8d1fc2..f159ead960 100644
--- a/src/compiler/js-typed-lowering.cc
+++ b/src/compiler/js-typed-lowering.cc
@@ -441,6 +441,37 @@ Reduction JSTypedLowering::ReduceJSBitwiseNot(Node* node) {
   return NoChange();
 }
 
+Reduction JSTypedLowering::ReduceJSDecrement(Node* node) {
+  Node* input = NodeProperties::GetValueInput(node, 0);
+  Type* input_type = NodeProperties::GetType(input);
+  if (input_type->Is(Type::PlainPrimitive())) {
+    // JSDecrement(x) => NumberSubtract(ToNumber(x), 1)
+    node->InsertInput(graph()->zone(), 1, jsgraph()->OneConstant());
+    NodeProperties::ChangeOp(node, javascript()->Subtract());
+    JSBinopReduction r(this, node);
+    r.ConvertInputsToNumber();
+    DCHECK_EQ(simplified()->NumberSubtract(), r.NumberOp());
+    return r.ChangeToPureOperator(r.NumberOp(), Type::Number());
+  }
+  return NoChange();
+}
+
+Reduction JSTypedLowering::ReduceJSIncrement(Node* node) {
+  Node* input = NodeProperties::GetValueInput(node, 0);
+  Type* input_type = NodeProperties::GetType(input);
+  if (input_type->Is(Type::PlainPrimitive())) {
+    // JSIncrement(x) => NumberAdd(ToNumber(x), 1)
+    node->InsertInput(graph()->zone(), 1, jsgraph()->OneConstant());
+    BinaryOperationHint hint = BinaryOperationHint::kAny;  // Dummy.
+    NodeProperties::ChangeOp(node, javascript()->Add(hint));
+    JSBinopReduction r(this, node);
+    r.ConvertInputsToNumber();
+    DCHECK_EQ(simplified()->NumberAdd(), r.NumberOp());
+    return r.ChangeToPureOperator(r.NumberOp(), Type::Number());
+  }
+  return NoChange();
+}
+
 Reduction JSTypedLowering::ReduceJSNegate(Node* node) {
   Node* input = NodeProperties::GetValueInput(node, 0);
   Type* input_type = NodeProperties::GetType(input);
@@ -2095,6 +2126,10 @@ Reduction JSTypedLowering::Reduce(Node* node) {
       return ReduceNumberBinop(node);
     case IrOpcode::kJSBitwiseNot:
       return ReduceJSBitwiseNot(node);
+    case IrOpcode::kJSDecrement:
+      return ReduceJSDecrement(node);
+    case IrOpcode::kJSIncrement:
+      return ReduceJSIncrement(node);
     case IrOpcode::kJSNegate:
       return ReduceJSNegate(node);
     case IrOpcode::kJSHasInPrototypeChain:
diff --git a/src/compiler/js-typed-lowering.h b/src/compiler/js-typed-lowering.h
index c11d7476b3..8b00c1d32c 100644
--- a/src/compiler/js-typed-lowering.h
+++ b/src/compiler/js-typed-lowering.h
@@ -41,6 +41,8 @@ class V8_EXPORT_PRIVATE JSTypedLowering final
 
   Reduction ReduceJSAdd(Node* node);
   Reduction ReduceJSBitwiseNot(Node* node);
+  Reduction ReduceJSDecrement(Node* node);
+  Reduction ReduceJSIncrement(Node* node);
   Reduction ReduceJSNegate(Node* node);
   Reduction ReduceJSComparison(Node* node);
   Reduction ReduceJSLoadNamed(Node* node);
diff --git a/src/compiler/opcodes.h b/src/compiler/opcodes.h
index d2966bf068..651635db18 100644
--- a/src/compiler/opcodes.h
+++ b/src/compiler/opcodes.h
@@ -127,6 +127,8 @@
 #define JS_SIMPLE_UNOP_LIST(V) \
   JS_CONVERSION_UNOP_LIST(V)   \
   V(JSBitwiseNot)              \
+  V(JSDecrement)               \
+  V(JSIncrement)               \
   V(JSNegate)
 
 #define JS_OBJECT_OP_LIST(V)      \
diff --git a/src/compiler/operator-properties.cc b/src/compiler/operator-properties.cc
index 96fa8de8c4..b6e8841393 100644
--- a/src/compiler/operator-properties.cc
+++ b/src/compiler/operator-properties.cc
@@ -111,6 +111,8 @@ bool OperatorProperties::HasFrameStateInput(const Operator* op) {
     case IrOpcode::kJSDebugger:
     case IrOpcode::kJSGetSuperConstructor:
     case IrOpcode::kJSBitwiseNot:
+    case IrOpcode::kJSDecrement:
+    case IrOpcode::kJSIncrement:
     case IrOpcode::kJSNegate:
       return true;
 
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index b203f72924..342dd7d454 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -3046,6 +3046,8 @@ class RepresentationSelector {
         JS_OTHER_OP_LIST(OPCODE_CASE)
 #undef OPCODE_CASE
       case IrOpcode::kJSBitwiseNot:
+      case IrOpcode::kJSDecrement:
+      case IrOpcode::kJSIncrement:
       case IrOpcode::kJSNegate:
       case IrOpcode::kJSToInteger:
       case IrOpcode::kJSToLength:
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index f9993415e3..12b0090ee1 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -265,6 +265,8 @@ class Typer::Visitor : public Reducer {
   static Type* FalsifyUndefined(ComparisonOutcome, Typer*);
 
   static Type* BitwiseNot(Type*, Typer*);
+  static Type* Decrement(Type*, Typer*);
+  static Type* Increment(Type*, Typer*);
   static Type* Negate(Type*, Typer*);
 
   static Type* ToPrimitive(Type*, Typer*);
@@ -435,6 +437,22 @@ Type* Typer::Visitor::BitwiseNot(Type* type, Typer* t) {
   return Type::Numeric();
 }
 
+Type* Typer::Visitor::Decrement(Type* type, Typer* t) {
+  type = ToNumeric(type, t);
+  if (type->Is(Type::Number())) {
+    return NumberSubtract(type, t->cache_.kSingletonOne, t);
+  }
+  return Type::Numeric();
+}
+
+Type* Typer::Visitor::Increment(Type* type, Typer* t) {
+  type = ToNumeric(type, t);
+  if (type->Is(Type::Number())) {
+    return NumberAdd(type, t->cache_.kSingletonOne, t);
+  }
+  return Type::Numeric();
+}
+
 Type* Typer::Visitor::Negate(Type* type, Typer* t) {
   type = ToNumeric(type, t);
   if (type->Is(Type::Number())) {
@@ -1092,6 +1110,14 @@ Type* Typer::Visitor::TypeJSBitwiseNot(Node* node) {
   return TypeUnaryOp(node, BitwiseNot);
 }
 
+Type* Typer::Visitor::TypeJSDecrement(Node* node) {
+  return TypeUnaryOp(node, Decrement);
+}
+
+Type* Typer::Visitor::TypeJSIncrement(Node* node) {
+  return TypeUnaryOp(node, Increment);
+}
+
 Type* Typer::Visitor::TypeJSNegate(Node* node) {
   return TypeUnaryOp(node, Negate);
 }
diff --git a/src/compiler/verifier.cc b/src/compiler/verifier.cc
index 859029ed1d..6d856fd5ce 100644
--- a/src/compiler/verifier.cc
+++ b/src/compiler/verifier.cc
@@ -613,6 +613,8 @@ void Verifier::Visitor::Check(Node* node, const AllNodes& all) {
       break;
 
     case IrOpcode::kJSBitwiseNot:
+    case IrOpcode::kJSDecrement:
+    case IrOpcode::kJSIncrement:
     case IrOpcode::kJSNegate:
       // Type is Numeric.
       CheckTypeIs(node, Type::Numeric());