[runtime] Remove the redundant %_IsObject intrinsic.

src/ppc/lithium-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.
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/cpu-profiler.h"
 #include "src/hydrogen-osr.h"
 #include "src/ic/ic.h"
@@ skipping 2507 matching lines @@
     __ cmp(scratch, r0);
     __ bne(&skip);
     __ cmpi(ip, Operand::Zero());
     __ bind(&skip);
 #endif
     EmitBranch(instr, eq);
   }
 }
 
 
-Condition LCodeGen::EmitIsObject(Register input, Register temp1,
-                                 Label* is_not_object, Label* is_object) {
-  Register temp2 = scratch0();
-  __ JumpIfSmi(input, is_not_object);
-
-  __ LoadRoot(temp2, Heap::kNullValueRootIndex);
-  __ cmp(input, temp2);
-  __ beq(is_object);
-
-  // Load map.
-  __ LoadP(temp1, FieldMemOperand(input, HeapObject::kMapOffset));
-  // Undetectable objects behave like undefined.
-  __ lbz(temp2, FieldMemOperand(temp1, Map::kBitFieldOffset));
-  __ TestBit(temp2, Map::kIsUndetectable, r0);
-  __ bne(is_not_object, cr0);
-
-  // Load instance type and check that it is in object type range.
-  __ lbz(temp2, FieldMemOperand(temp1, Map::kInstanceTypeOffset));
-  __ cmpi(temp2, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
-  __ blt(is_not_object);
-  __ cmpi(temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE));
-  return le;
-}
-
-
-void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) {
-  Register reg = ToRegister(instr->value());
-  Register temp1 = ToRegister(instr->temp());
-
-  Condition true_cond = EmitIsObject(reg, temp1, instr->FalseLabel(chunk_),
-                                     instr->TrueLabel(chunk_));
-
-  EmitBranch(instr, true_cond);
-}
-
-
 Condition LCodeGen::EmitIsString(Register input, Register temp1,
                                  Label* is_not_string,
                                  SmiCheck check_needed = INLINE_SMI_CHECK) {
   if (check_needed == INLINE_SMI_CHECK) {
     __ JumpIfSmi(input, is_not_string);
   }
   __ CompareObjectType(input, temp1, temp1, FIRST_NONSTRING_TYPE);
 
   return lt;
 }
@@ skipping 3750 matching lines @@
   __ Push(scope_info);
   __ push(ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8