[runtime] Remove the redundant %_IsObject intrinsic.

src/hydrogen-instructions.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/hydrogen-instructions.h"
 
 #include "src/base/bits.h"
 #include "src/double.h"
 #include "src/elements.h"
 #include "src/factory.h"
@@ skipping 795 matching lines @@
     case HValue::kEnvironmentMarker:
     case HValue::kForceRepresentation:
     case HValue::kGetCachedArrayIndex:
     case HValue::kGoto:
     case HValue::kHasCachedArrayIndexAndBranch:
     case HValue::kHasInstanceTypeAndBranch:
     case HValue::kInnerAllocatedObject:
     case HValue::kInstanceOf:
     case HValue::kIsConstructCallAndBranch:
     case HValue::kHasInPrototypeChainAndBranch:
-    case HValue::kIsObjectAndBranch:
     case HValue::kIsSmiAndBranch:
     case HValue::kIsStringAndBranch:
     case HValue::kIsUndetectableAndBranch:
     case HValue::kLeaveInlined:
     case HValue::kLoadFieldByIndex:
     case HValue::kLoadGlobalGeneric:
     case HValue::kLoadGlobalViaContext:
     case HValue::kLoadNamedField:
     case HValue::kLoadNamedGeneric:
     case HValue::kLoadRoot:
@@ skipping 2439 matching lines @@
   if (FLAG_fold_constants && left()->IsConstant() && right()->IsConstant()) {
     *block = HConstant::cast(left())->DataEquals(HConstant::cast(right()))
         ? FirstSuccessor() : SecondSuccessor();
     return true;
   }
   *block = NULL;
   return false;
 }
 
 
-bool ConstantIsObject(HConstant* constant, Isolate* isolate) {
-  if (constant->HasNumberValue()) return false;
-  if (constant->GetUnique().IsKnownGlobal(isolate->heap()->null_value())) {
-    return true;
-  }
-  if (constant->IsUndetectable()) return false;
-  InstanceType type = constant->GetInstanceType();
-  return (FIRST_NONCALLABLE_SPEC_OBJECT_TYPE <= type) &&
-         (type <= LAST_NONCALLABLE_SPEC_OBJECT_TYPE);
-}
-
-
-bool HIsObjectAndBranch::KnownSuccessorBlock(HBasicBlock** block) {
-  if (FLAG_fold_constants && value()->IsConstant()) {
-    *block = ConstantIsObject(HConstant::cast(value()), isolate())
-        ? FirstSuccessor() : SecondSuccessor();
-    return true;
-  }
-  *block = NULL;
-  return false;
-}
-
-
 bool HIsStringAndBranch::KnownSuccessorBlock(HBasicBlock** block) {
   if (known_successor_index() != kNoKnownSuccessorIndex) {
     *block = SuccessorAt(known_successor_index());
     return true;
   }
   if (FLAG_fold_constants && value()->IsConstant()) {
     *block = HConstant::cast(value())->HasStringValue()
         ? FirstSuccessor() : SecondSuccessor();
     return true;
   }
@@ skipping 1435 matching lines @@
     case HObjectAccess::kExternalMemory:
       os << "[external-memory]";
       break;
   }
 
   return os << "@" << access.offset();
 }
 
 }  // namespace internal
 }  // namespace v8