[turbofan] Remove unused JSToInteger operator.

The JSToInteger operator is not used anywhere in TurboFan nowadays, so
no point in keeping the dead code in the tree.

Bug: v8:8015
Change-Id: If03ba63c4b932ba0aac60b9bbc89fee3909a93c6
Reviewed-on: https://chromium-review.googlesource.com/1238238Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56126}

src/compiler/js-generic-lowering.cc

@@ -79,7 +79,6 @@ REPLACE_STUB_CALL(Increment)
 REPLACE_STUB_CALL(Negate)
 REPLACE_STUB_CALL(HasProperty)
 REPLACE_STUB_CALL(Equal)
-REPLACE_STUB_CALL(ToInteger)
 REPLACE_STUB_CALL(ToLength)
 REPLACE_STUB_CALL(ToNumber)
 REPLACE_STUB_CALL(ToNumberConvertBigInt)

src/compiler/js-operator.cc

@@ -609,7 +609,6 @@ CompareOperationHint CompareOperationHintOf(const Operator* op) {
   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)                           \
   V(ToName, Operator::kNoProperties, 1, 1)                             \
   V(ToNumber, Operator::kNoProperties, 1, 1)                           \

src/compiler/js-operator.h

@@ -703,7 +703,6 @@ class V8_EXPORT_PRIVATE JSOperatorBuilder final
   const Operator* Increment();
   const Operator* Negate();
 
-  const Operator* ToInteger();
   const Operator* ToLength();
   const Operator* ToName();
   const Operator* ToNumber();

src/compiler/js-typed-lowering.cc

@@ -892,17 +892,6 @@ Reduction JSTypedLowering::ReduceJSStrictEqual(Node* node) {
   return NoChange();
 }
 
-Reduction JSTypedLowering::ReduceJSToInteger(Node* node) {
-  Node* const input = NodeProperties::GetValueInput(node, 0);
-  Type const input_type = NodeProperties::GetType(input);
-  if (input_type.Is(type_cache_.kIntegerOrMinusZero)) {
-    // JSToInteger(x:integer) => x
-    ReplaceWithValue(node, input);
-    return Replace(input);
-  }
-  return NoChange();
-}
-
 Reduction JSTypedLowering::ReduceJSToName(Node* node) {
   Node* const input = NodeProperties::GetValueInput(node, 0);
   Type const input_type = NodeProperties::GetType(input);
@@ -2269,8 +2258,6 @@ Reduction JSTypedLowering::Reduce(Node* node) {
       return ReduceJSHasInPrototypeChain(node);
     case IrOpcode::kJSOrdinaryHasInstance:
       return ReduceJSOrdinaryHasInstance(node);
-    case IrOpcode::kJSToInteger:
-      return ReduceJSToInteger(node);
     case IrOpcode::kJSToLength:
       return ReduceJSToLength(node);
     case IrOpcode::kJSToName:

src/compiler/js-typed-lowering.h

@@ -57,7 +57,6 @@ class V8_EXPORT_PRIVATE JSTypedLowering final
   Reduction ReduceJSStoreModule(Node* node);
   Reduction ReduceJSEqual(Node* node);
   Reduction ReduceJSStrictEqual(Node* node);
-  Reduction ReduceJSToInteger(Node* node);
   Reduction ReduceJSToLength(Node* node);
   Reduction ReduceJSToName(Node* node);
   Reduction ReduceJSToNumberInput(Node* input);

src/compiler/node-properties.cc

@@ -599,7 +599,6 @@ bool NodeProperties::CanBeNullOrUndefined(Isolate* isolate, Node* receiver,
       case IrOpcode::kCheckSmi:
       case IrOpcode::kCheckString:
       case IrOpcode::kCheckSymbol:
-      case IrOpcode::kJSToInteger:
       case IrOpcode::kJSToLength:
       case IrOpcode::kJSToName:
       case IrOpcode::kJSToNumber:

src/compiler/opcodes.h

@@ -117,7 +117,6 @@
   V(JSOrdinaryHasInstance)
 
 #define JS_CONVERSION_UNOP_LIST(V) \
-  V(JSToInteger)                   \
   V(JSToLength)                    \
   V(JSToName)                      \
   V(JSToNumber)                    \

src/compiler/operator-properties.cc

@@ -91,7 +91,6 @@ bool OperatorProperties::HasFrameStateInput(const Operator* op) {
     case IrOpcode::kJSDeleteProperty:
 
     // Conversions
-    case IrOpcode::kJSToInteger:
     case IrOpcode::kJSToLength:
     case IrOpcode::kJSToName:
     case IrOpcode::kJSToNumber:

src/compiler/simplified-lowering.cc

@@ -3189,7 +3189,6 @@ class RepresentationSelector {
       case IrOpcode::kJSDecrement:
       case IrOpcode::kJSIncrement:
       case IrOpcode::kJSNegate:
-      case IrOpcode::kJSToInteger:
       case IrOpcode::kJSToLength:
       case IrOpcode::kJSToName:
       case IrOpcode::kJSToObject:

src/compiler/typer.cc

@@ -1114,10 +1114,6 @@ Type Typer::Visitor::TypeToBoolean(Node* node) {
   return TypeUnaryOp(node, ToBoolean);
 }
 
-Type Typer::Visitor::TypeJSToInteger(Node* node) {
-  return TypeUnaryOp(node, ToInteger);
-}
-
 Type Typer::Visitor::TypeJSToLength(Node* node) {
   return TypeUnaryOp(node, ToLength);
 }

src/compiler/verifier.cc

@@ -617,10 +617,6 @@ void Verifier::Visitor::Check(Node* node, const AllNodes& all) {
       // Type is Boolean.
       CheckTypeIs(node, Type::Boolean());
       break;
-    case IrOpcode::kJSToInteger:
-      // Type is OrderedNumber.
-      CheckTypeIs(node, Type::OrderedNumber());
-      break;
     case IrOpcode::kJSToLength:
       CheckTypeIs(node, Type::Range(0, kMaxSafeInteger, zone));
       break;

test/unittests/compiler/typer-unittest.cc

@@ -434,7 +434,6 @@ TEST_F(TyperTest, TypeJSStrictEqual) {
   TEST_F(TyperTest, Monotonicity_##name) {     \
     TestUnaryMonotonicity(javascript_.name()); \
   }
-TEST_MONOTONICITY(ToInteger)
 TEST_MONOTONICITY(ToLength)
 TEST_MONOTONICITY(ToName)
 TEST_MONOTONICITY(ToNumber)