Make sure transitioned arrays efficiently call builtin Array functions

src/arm/stub-cache-arm.cc

-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 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
 //       with the distribution.
@@ skipping 357 matching lines @@
                                       Handle<JSObject> object,
                                       int index,
                                       Handle<Map> transition,
                                       Register receiver_reg,
                                       Register name_reg,
                                       Register scratch,
                                       Label* miss_label) {
   // r0 : value
   Label exit;
 
-  // Check that the receiver isn't a smi.
-  __ JumpIfSmi(receiver_reg, miss_label);
-
-  // Check that the map of the receiver hasn't changed.
-  __ ldr(scratch, FieldMemOperand(receiver_reg, HeapObject::kMapOffset));
-  __ cmp(scratch, Operand(Handle<Map>(object->map())));
-  __ b(ne, miss_label);
+  // Check that the map of the object hasn't changed.
+  __ CheckMap(receiver_reg, scratch, Handle<Map>(object->map()), miss_label,
+              DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS);
 
   // Perform global security token check if needed.
   if (object->IsJSGlobalProxy()) {
     __ CheckAccessGlobalProxy(receiver_reg, scratch, miss_label);
   }
 
   // Stub never generated for non-global objects that require access
   // checks.
   ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
 
@@ skipping 616 matching lines @@
              StringDictionary::kNotFound);
 
       GenerateDictionaryNegativeLookup(masm(), miss, reg, name,
                                        scratch1, scratch2);
 
       __ ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset));
       reg = holder_reg;  // From now on the object will be in holder_reg.
       __ ldr(reg, FieldMemOperand(scratch1, Map::kPrototypeOffset));
     } else {
       Handle<Map> current_map(current->map());
-      __ ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset));
-      __ cmp(scratch1, Operand(current_map));
-      // Branch on the result of the map check.
-      __ b(ne, miss);
+      __ CheckMap(reg, scratch1, current_map, miss, DONT_DO_SMI_CHECK,
+                  ALLOW_ELEMENT_TRANSITION_MAPS);
+
       // Check access rights to the global object.  This has to happen after
       // the map check so that we know that the object is actually a global
       // object.
       if (current->IsJSGlobalProxy()) {
         __ CheckAccessGlobalProxy(reg, scratch2, miss);
       }
       reg = holder_reg;  // From now on the object will be in holder_reg.
 
       if (heap()->InNewSpace(*prototype)) {
         // The prototype is in new space; we cannot store a reference to it
@@ skipping 10 matching lines @@
     }
 
     // Go to the next object in the prototype chain.
     current = prototype;
   }
 
   // Log the check depth.
   LOG(masm()->isolate(), IntEvent("check-maps-depth", depth + 1));
 
   // Check the holder map.
-  __ ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset));
-  __ cmp(scratch1, Operand(Handle<Map>(current->map())));
-  __ b(ne, miss);
+  __ CheckMap(reg, scratch1, Handle<Map>(current->map()), miss,
+              DONT_DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS);
 
   // Perform security check for access to the global object.
   ASSERT(holder->IsJSGlobalProxy() || !holder->IsAccessCheckNeeded());
   if (holder->IsJSGlobalProxy()) {
     __ CheckAccessGlobalProxy(reg, scratch1, miss);
   }
 
   // If we've skipped any global objects, it's not enough to verify that
   // their maps haven't changed.  We also need to check that the property
   // cell for the property is still empty.
@@ skipping 1396 matching lines @@
     Handle<AccessorInfo> callback,
     Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- r0    : value
   //  -- r1    : receiver
   //  -- r2    : name
   //  -- lr    : return address
   // -----------------------------------
   Label miss;
 
-  // Check that the object isn't a smi.
-  __ JumpIfSmi(r1, &miss);
-
   // Check that the map of the object hasn't changed.
-  __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset));
-  __ cmp(r3, Operand(Handle<Map>(object->map())));
-  __ b(ne, &miss);
+  __ CheckMap(r1, r3, Handle<Map>(object->map()), &miss,
+              DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS);
 
   // Perform global security token check if needed.
   if (object->IsJSGlobalProxy()) {
     __ CheckAccessGlobalProxy(r1, r3, &miss);
   }
 
   // Stub never generated for non-global objects that require access
   // checks.
   ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
 
@@ skipping 21 matching lines @@
     Handle<JSObject> receiver,
     Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- r0    : value
   //  -- r1    : receiver
   //  -- r2    : name
   //  -- lr    : return address
   // -----------------------------------
   Label miss;
 
-  // Check that the object isn't a smi.
-  __ JumpIfSmi(r1, &miss);
-
   // Check that the map of the object hasn't changed.
-  __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset));
-  __ cmp(r3, Operand(Handle<Map>(receiver->map())));
-  __ b(ne, &miss);
+  __ CheckMap(r1, r3, Handle<Map>(receiver->map()), &miss,
+              DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS);
 
   // Perform global security token check if needed.
   if (receiver->IsJSGlobalProxy()) {
     __ CheckAccessGlobalProxy(r1, r3, &miss);
   }
 
   // Stub is never generated for non-global objects that require access
   // checks.
   ASSERT(receiver->IsJSGlobalProxy() || !receiver->IsAccessCheckNeeded());
 
@@ skipping 1686 matching lines @@
   Handle<Code> ic_miss = masm->isolate()->builtins()->KeyedStoreIC_Miss();
   __ Jump(ic_miss, RelocInfo::CODE_TARGET);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM