Support %_IsUndetectableObject in crankshaft.

src/arm/lithium-codegen-arm.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1756 matching lines @@
 void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   Register input_reg = EmitLoadRegister(instr->InputAt(0), ip);
   __ tst(input_reg, Operand(kSmiTagMask));
   EmitBranch(true_block, false_block, eq);
 }
 
 
+void LCodeGen::DoIsUndetectable(LIsUndetectable* instr) {
+  Register input = ToRegister(instr->InputAt(0));
+  Register result = ToRegister(instr->result());
+
+  ASSERT(instr->hydrogen()->value()->representation().IsTagged());
+  Label false_label, done;
+  __ JumpIfSmi(input, &false_label);
+  __ ldr(result, FieldMemOperand(input, HeapObject::kMapOffset));
+  __ ldrb(result, FieldMemOperand(result, Map::kBitFieldOffset));
+  __ tst(result, Operand(1 << Map::kIsUndetectable));
+  __ b(eq, &false_label);
+  __ LoadRoot(result, Heap::kTrueValueRootIndex);
+  __ jmp(&done);
+  __ bind(&false_label);
+  __ LoadRoot(result, Heap::kFalseValueRootIndex);
+  __ bind(&done);
+}
+
+
+void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) {
+  Register input = ToRegister(instr->InputAt(0));
+  Register temp = ToRegister(instr->TempAt(0));
+
+  int true_block = chunk_->LookupDestination(instr->true_block_id());
+  int false_block = chunk_->LookupDestination(instr->false_block_id());
+
+  __ JumpIfSmi(input, chunk_->GetAssemblyLabel(false_block));
+  __ ldr(temp, FieldMemOperand(input, HeapObject::kMapOffset));
+  __ ldrb(temp, FieldMemOperand(temp, Map::kBitFieldOffset));
+  __ tst(temp, Operand(1 << Map::kIsUndetectable));
+  EmitBranch(true_block, false_block, ne);
+}
+
+
 static InstanceType TestType(HHasInstanceType* instr) {
   InstanceType from = instr->from();
   InstanceType to = instr->to();
   if (from == FIRST_TYPE) return to;
   ASSERT(from == to || to == LAST_TYPE);
   return from;
 }
 
 
 static Condition BranchCondition(HHasInstanceType* instr) {
@@ skipping 2543 matching lines @@
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 
 
 
 #undef __
 
 } }  // namespace v8::internal