[runtime] Remove the redundant %_IsObject intrinsic.

src/full-codegen/ppc/full-codegen-ppc.cc

 // Copyright 2014 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.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
@@ skipping 3345 matching lines @@
                          &if_false, &fall_through);
 
   PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
   __ TestIfPositiveSmi(r3, r0);
   Split(eq, if_true, if_false, fall_through, cr0);
 
   context()->Plug(if_true, if_false);
 }
 
 
-void FullCodeGenerator::EmitIsObject(CallRuntime* expr) {
-  ZoneList<Expression*>* args = expr->arguments();
-  DCHECK(args->length() == 1);
-
-  VisitForAccumulatorValue(args->at(0));
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  Label* fall_through = NULL;
-  context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
-                         &if_false, &fall_through);
-
-  __ JumpIfSmi(r3, if_false);
-  __ LoadRoot(ip, Heap::kNullValueRootIndex);
-  __ cmp(r3, ip);
-  __ beq(if_true);
-  __ LoadP(r5, FieldMemOperand(r3, HeapObject::kMapOffset));
-  // Undetectable objects behave like undefined when tested with typeof.
-  __ lbz(r4, FieldMemOperand(r5, Map::kBitFieldOffset));
-  __ andi(r0, r4, Operand(1 << Map::kIsUndetectable));
-  __ bne(if_false, cr0);
-  __ lbz(r4, FieldMemOperand(r5, Map::kInstanceTypeOffset));
-  __ cmpi(r4, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
-  __ blt(if_false);
-  __ cmpi(r4, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE));
-  PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
-  Split(le, if_true, if_false, fall_through);
-
-  context()->Plug(if_true, if_false);
-}
-
-
 void FullCodeGenerator::EmitIsSpecObject(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 1);
 
   VisitForAccumulatorValue(args->at(0));
 
   Label materialize_true, materialize_false;
   Label* if_true = NULL;
   Label* if_false = NULL;
   Label* fall_through = NULL;
@@ skipping 1980 matching lines @@
     return ON_STACK_REPLACEMENT;
   }
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_PPC