[stubs] Remove dead IncStub and DecStub

src/code-stubs.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/code-stubs.h"
 
 #include <sstream>
 
 #include "src/ast/ast.h"
 #include "src/bootstrapper.h"
@@ skipping 1494 matching lines @@
     var_result.Bind(assembler->CallStub(callable, context, dividend, divisor));
     assembler->Goto(&end);
   }
 
   assembler->Bind(&end);
   assembler->UpdateFeedback(var_type_feedback.value(), type_feedback_vector,
                             slot_id);
   return var_result.value();
 }
 
-#define UNARY_OP_STUB(Name)                                                   \
-  void Name::GenerateAssembly(compiler::CodeAssemblerState* state) const {    \
-    CodeStubAssembler assembler(state);                                       \
-    assembler.Return(Generate(&assembler, assembler.Parameter(0),             \
-                              assembler.Parameter(1), assembler.Parameter(2), \
-                              assembler.Parameter(3)));                       \
-  }
-UNARY_OP_STUB(IncStub)
-UNARY_OP_STUB(DecStub)
-#undef UNARY_OP_STUB
-
-// static
-compiler::Node* IncStub::Generate(CodeStubAssembler* assembler,
-                                  compiler::Node* value,
-                                  compiler::Node* context,
-                                  compiler::Node* type_feedback_vector,
-                                  compiler::Node* slot_id) {
-  typedef CodeStubAssembler::Label Label;
-  typedef compiler::Node Node;
-  typedef CodeStubAssembler::Variable Variable;
-
-  // Shared entry for floating point increment.
-  Label do_finc(assembler), end(assembler);
-  Variable var_finc_value(assembler, MachineRepresentation::kFloat64);
-
-  // We might need to try again due to ToNumber conversion.
-  Variable value_var(assembler, MachineRepresentation::kTagged);
-  Variable result_var(assembler, MachineRepresentation::kTagged);
-  Variable var_type_feedback(assembler, MachineRepresentation::kWord32);
-  Variable* loop_vars[] = {&value_var, &var_type_feedback};
-  Label start(assembler, 2, loop_vars);
-  value_var.Bind(value);
-  var_type_feedback.Bind(
-      assembler->Int32Constant(BinaryOperationFeedback::kNone));
-  assembler->Goto(&start);
-  assembler->Bind(&start);
-  {
-    value = value_var.value();
-
-    Label if_issmi(assembler), if_isnotsmi(assembler);
-    assembler->Branch(assembler->TaggedIsSmi(value), &if_issmi, &if_isnotsmi);
-
-    assembler->Bind(&if_issmi);
-    {
-      // Try fast Smi addition first.
-      Node* one = assembler->SmiConstant(Smi::FromInt(1));
-      Node* pair = assembler->IntPtrAddWithOverflow(
-          assembler->BitcastTaggedToWord(value),
-          assembler->BitcastTaggedToWord(one));
-      Node* overflow = assembler->Projection(1, pair);
-
-      // Check if the Smi addition overflowed.
-      Label if_overflow(assembler), if_notoverflow(assembler);
-      assembler->Branch(overflow, &if_overflow, &if_notoverflow);
-
-      assembler->Bind(&if_notoverflow);
-      var_type_feedback.Bind(assembler->Word32Or(
-          var_type_feedback.value(),
-          assembler->Int32Constant(BinaryOperationFeedback::kSignedSmall)));
-      result_var.Bind(
-          assembler->BitcastWordToTaggedSigned(assembler->Projection(0, pair)));
-      assembler->Goto(&end);
-
-      assembler->Bind(&if_overflow);
-      {
-        var_finc_value.Bind(assembler->SmiToFloat64(value));
-        assembler->Goto(&do_finc);
-      }
-    }
-
-    assembler->Bind(&if_isnotsmi);
-    {
-      // Check if the value is a HeapNumber.
-      Label if_valueisnumber(assembler),
-          if_valuenotnumber(assembler, Label::kDeferred);
-      Node* value_map = assembler->LoadMap(value);
-      assembler->Branch(assembler->IsHeapNumberMap(value_map),
-                        &if_valueisnumber, &if_valuenotnumber);
-
-      assembler->Bind(&if_valueisnumber);
-      {
-        // Load the HeapNumber value.
-        var_finc_value.Bind(assembler->LoadHeapNumberValue(value));
-        assembler->Goto(&do_finc);
-      }
-
-      assembler->Bind(&if_valuenotnumber);
-      {
-        // We do not require an Or with earlier feedback here because once we
-        // convert the value to a number, we cannot reach this path. We can
-        // only reach this path on the first pass when the feedback is kNone.
-        CSA_ASSERT(assembler,
-                   assembler->Word32Equal(var_type_feedback.value(),
-                                          assembler->Int32Constant(
-                                              BinaryOperationFeedback::kNone)));
-
-        Label if_valueisoddball(assembler), if_valuenotoddball(assembler);
-        Node* instance_type = assembler->LoadMapInstanceType(value_map);
-        Node* is_oddball = assembler->Word32Equal(
-            instance_type, assembler->Int32Constant(ODDBALL_TYPE));
-        assembler->Branch(is_oddball, &if_valueisoddball, &if_valuenotoddball);
-
-        assembler->Bind(&if_valueisoddball);
-        {
-          // Convert Oddball to Number and check again.
-          value_var.Bind(
-              assembler->LoadObjectField(value, Oddball::kToNumberOffset));
-          var_type_feedback.Bind(assembler->Int32Constant(
-              BinaryOperationFeedback::kNumberOrOddball));
-          assembler->Goto(&start);
-        }
-
-        assembler->Bind(&if_valuenotoddball);
-        {
-          // Convert to a Number first and try again.
-          Callable callable =
-              CodeFactory::NonNumberToNumber(assembler->isolate());
-          var_type_feedback.Bind(
-              assembler->Int32Constant(BinaryOperationFeedback::kAny));
-          value_var.Bind(assembler->CallStub(callable, context, value));
-          assembler->Goto(&start);
-        }
-      }
-    }
-  }
-
-  assembler->Bind(&do_finc);
-  {
-    Node* finc_value = var_finc_value.value();
-    Node* one = assembler->Float64Constant(1.0);
-    Node* finc_result = assembler->Float64Add(finc_value, one);
-    var_type_feedback.Bind(assembler->Word32Or(
-        var_type_feedback.value(),
-        assembler->Int32Constant(BinaryOperationFeedback::kNumber)));
-    result_var.Bind(assembler->AllocateHeapNumberWithValue(finc_result));
-    assembler->Goto(&end);
-  }
-
-  assembler->Bind(&end);
-  assembler->UpdateFeedback(var_type_feedback.value(), type_feedback_vector,
-                            slot_id);
-  return result_var.value();
-}
-
 void NumberToStringStub::GenerateAssembly(
     compiler::CodeAssemblerState* state) const {
   typedef compiler::Node Node;
   CodeStubAssembler assembler(state);
   Node* argument = assembler.Parameter(Descriptor::kArgument);
   Node* context = assembler.Parameter(Descriptor::kContext);
   assembler.Return(assembler.NumberToString(context, argument));
 }
 
-// static
-compiler::Node* DecStub::Generate(CodeStubAssembler* assembler,
-                                  compiler::Node* value,
-                                  compiler::Node* context,
-                                  compiler::Node* type_feedback_vector,
-                                  compiler::Node* slot_id) {
-  typedef CodeStubAssembler::Label Label;
-  typedef compiler::Node Node;
-  typedef CodeStubAssembler::Variable Variable;
-
-  // Shared entry for floating point decrement.
-  Label do_fdec(assembler), end(assembler);
-  Variable var_fdec_value(assembler, MachineRepresentation::kFloat64);
-
-  // We might need to try again due to ToNumber conversion.
-  Variable value_var(assembler, MachineRepresentation::kTagged);
-  Variable result_var(assembler, MachineRepresentation::kTagged);
-  Variable var_type_feedback(assembler, MachineRepresentation::kWord32);
-  Variable* loop_vars[] = {&value_var, &var_type_feedback};
-  Label start(assembler, 2, loop_vars);
-  var_type_feedback.Bind(
-      assembler->Int32Constant(BinaryOperationFeedback::kNone));
-  value_var.Bind(value);
-  assembler->Goto(&start);
-  assembler->Bind(&start);
-  {
-    value = value_var.value();
-
-    Label if_issmi(assembler), if_isnotsmi(assembler);
-    assembler->Branch(assembler->TaggedIsSmi(value), &if_issmi, &if_isnotsmi);
-
-    assembler->Bind(&if_issmi);
-    {
-      // Try fast Smi subtraction first.
-      Node* one = assembler->SmiConstant(Smi::FromInt(1));
-      Node* pair = assembler->IntPtrSubWithOverflow(
-          assembler->BitcastTaggedToWord(value),
-          assembler->BitcastTaggedToWord(one));
-      Node* overflow = assembler->Projection(1, pair);
-
-      // Check if the Smi subtraction overflowed.
-      Label if_overflow(assembler), if_notoverflow(assembler);
-      assembler->Branch(overflow, &if_overflow, &if_notoverflow);
-
-      assembler->Bind(&if_notoverflow);
-      var_type_feedback.Bind(assembler->Word32Or(
-          var_type_feedback.value(),
-          assembler->Int32Constant(BinaryOperationFeedback::kSignedSmall)));
-      result_var.Bind(
-          assembler->BitcastWordToTaggedSigned(assembler->Projection(0, pair)));
-      assembler->Goto(&end);
-
-      assembler->Bind(&if_overflow);
-      {
-        var_fdec_value.Bind(assembler->SmiToFloat64(value));
-        assembler->Goto(&do_fdec);
-      }
-    }
-
-    assembler->Bind(&if_isnotsmi);
-    {
-      // Check if the value is a HeapNumber.
-      Label if_valueisnumber(assembler),
-          if_valuenotnumber(assembler, Label::kDeferred);
-      Node* value_map = assembler->LoadMap(value);
-      assembler->Branch(assembler->IsHeapNumberMap(value_map),
-                        &if_valueisnumber, &if_valuenotnumber);
-
-      assembler->Bind(&if_valueisnumber);
-      {
-        // Load the HeapNumber value.
-        var_fdec_value.Bind(assembler->LoadHeapNumberValue(value));
-        assembler->Goto(&do_fdec);
-      }
-
-      assembler->Bind(&if_valuenotnumber);
-      {
-        // We do not require an Or with earlier feedback here because once we
-        // convert the value to a number, we cannot reach this path. We can
-        // only reach this path on the first pass when the feedback is kNone.
-        CSA_ASSERT(assembler,
-                   assembler->Word32Equal(var_type_feedback.value(),
-                                          assembler->Int32Constant(
-                                              BinaryOperationFeedback::kNone)));
-
-        Label if_valueisoddball(assembler), if_valuenotoddball(assembler);
-        Node* instance_type = assembler->LoadMapInstanceType(value_map);
-        Node* is_oddball = assembler->Word32Equal(
-            instance_type, assembler->Int32Constant(ODDBALL_TYPE));
-        assembler->Branch(is_oddball, &if_valueisoddball, &if_valuenotoddball);
-
-        assembler->Bind(&if_valueisoddball);
-        {
-          // Convert Oddball to Number and check again.
-          value_var.Bind(
-              assembler->LoadObjectField(value, Oddball::kToNumberOffset));
-          var_type_feedback.Bind(assembler->Int32Constant(
-              BinaryOperationFeedback::kNumberOrOddball));
-          assembler->Goto(&start);
-        }
-
-        assembler->Bind(&if_valuenotoddball);
-        {
-          // Convert to a Number first and try again.
-          Callable callable =
-              CodeFactory::NonNumberToNumber(assembler->isolate());
-          var_type_feedback.Bind(
-              assembler->Int32Constant(BinaryOperationFeedback::kAny));
-          value_var.Bind(assembler->CallStub(callable, context, value));
-          assembler->Goto(&start);
-        }
-      }
-    }
-  }
-
-  assembler->Bind(&do_fdec);
-  {
-    Node* fdec_value = var_fdec_value.value();
-    Node* one = assembler->Float64Constant(1.0);
-    Node* fdec_result = assembler->Float64Sub(fdec_value, one);
-    var_type_feedback.Bind(assembler->Word32Or(
-        var_type_feedback.value(),
-        assembler->Int32Constant(BinaryOperationFeedback::kNumber)));
-    result_var.Bind(assembler->AllocateHeapNumberWithValue(fdec_result));
-    assembler->Goto(&end);
-  }
-
-  assembler->Bind(&end);
-  assembler->UpdateFeedback(var_type_feedback.value(), type_feedback_vector,
-                            slot_id);
-  return result_var.value();
-}
-
 // ES6 section 21.1.3.19 String.prototype.substring ( start, end )
 compiler::Node* SubStringStub::Generate(CodeStubAssembler* assembler,
                                         compiler::Node* string,
                                         compiler::Node* from,
                                         compiler::Node* to,
                                         compiler::Node* context) {
   return assembler->SubString(context, string, from, to);
 }
 
 void SubStringStub::GenerateAssembly(
@@ skipping 1152 matching lines @@
 }
 
 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate)
     : PlatformCodeStub(isolate) {}
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(Isolate* isolate)
     : PlatformCodeStub(isolate) {}
 
 }  // namespace internal
 }  // namespace v8