Implement IS_OBJECT and IS_FUNCTION as inlined runtime functions....

src/arm/codegen-arm.cc

 // Copyright 2006-2009 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 3367 matching lines @@
   __ and_(r1, r0, Operand(kSmiTagMask));
   __ eor(r1, r1, Operand(kSmiTagMask), SetCC);
   answer.Branch(ne);
   // It is a heap object - get the map. Check if the object is a JS array.
   __ CompareObjectType(r0, r1, r1, JS_ARRAY_TYPE);
   answer.Bind();
   cc_reg_ = eq;
 }
 
 
+void CodeGenerator::GenerateIsObject(ZoneList<Expression*>* args) {
+  // This generates a fast version of:
+  // (typeof(arg) === 'object' || %_ClassOf(arg) == 'RegExp')
+  VirtualFrame::SpilledScope spilled_scope;
+  ASSERT(args->length() == 1);
+  LoadAndSpill(args->at(0));
+  frame_->EmitPop(r1);
+  __ tst(r1, Operand(kSmiTagMask));
+  false_target()->Branch(eq);
+
+  __ LoadRoot(ip, Heap::kNullValueRootIndex);
+  __ cmp(r1, ip);
+  true_target()->Branch(eq);
+
+  Register map_reg = r2;
+  __ ldr(map_reg, FieldMemOperand(r1, HeapObject::kMapOffset));
+  // Undetectable objects behave like undefined when tested with typeof.
+  __ ldrb(r1, FieldMemOperand(map_reg, Map::kBitFieldOffset));
+  __ and_(r1, r1, Operand(1 << Map::kIsUndetectable));
+  __ cmp(r1, Operand(1 << Map::kIsUndetectable));
+  false_target()->Branch(eq);
+
+  __ ldrb(r1, FieldMemOperand(map_reg, Map::kInstanceTypeOffset));
+  __ cmp(r1, Operand(FIRST_JS_OBJECT_TYPE));
+  false_target()->Branch(lt);
+  __ cmp(r1, Operand(LAST_JS_OBJECT_TYPE));
+  cc_reg_ = le;
+}
+
+
+void CodeGenerator::GenerateIsFunction(ZoneList<Expression*>* args) {
+  // This generates a fast version of:
+  // (%_ClassOf(arg) === 'Function')
+  VirtualFrame::SpilledScope spilled_scope;
+  ASSERT(args->length() == 1);
+  LoadAndSpill(args->at(0));
+  frame_->EmitPop(r0);
+  __ tst(r0, Operand(kSmiTagMask));
+  false_target()->Branch(eq);
+  Register map_reg = r2;
+  __ CompareObjectType(r0, map_reg, r1, JS_FUNCTION_TYPE);
+  cc_reg_ = eq;
+}
+
+
 void CodeGenerator::GenerateIsConstructCall(ZoneList<Expression*>* args) {
   VirtualFrame::SpilledScope spilled_scope;
   ASSERT(args->length() == 0);
 
   // Get the frame pointer for the calling frame.
   __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
 
   // Skip the arguments adaptor frame if it exists.
   Label check_frame_marker;
   __ ldr(r1, MemOperand(r2, StandardFrameConstants::kContextOffset));
@@ skipping 3030 matching lines @@
 int CompareStub::MinorKey() {
   // Encode the two parameters in a unique 16 bit value.
   ASSERT(static_cast<unsigned>(cc_) >> 28 < (1 << 15));
   return (static_cast<unsigned>(cc_) >> 27) | (strict_ ? 1 : 0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal