[runtime] Remove the redundant %_IsObject intrinsic.

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

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 60ac0b58b5b00d79525f6c2964738609c5f14d22..6181df1fd8d6bdb0388d127fe4f477ce0280c972 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -3363,39 +3363,6 @@ void FullCodeGenerator::EmitIsNonNegativeSmi(CallRuntime* expr) {
 }
 
 
-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);