Port prototype-call-stubs for normal objects (http://codereview.chromium.org/...

src/arm/macro-assembler-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 855 matching lines @@
 
 void MacroAssembler::PopTryHandler() {
   ASSERT_EQ(0, StackHandlerConstants::kNextOffset);
   pop(r1);
   mov(ip, Operand(ExternalReference(Top::k_handler_address)));
   add(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize));
   str(r1, MemOperand(ip));
 }
 
 
-Register MacroAssembler::CheckMaps(JSObject* object, Register object_reg,
-                                   JSObject* holder, Register holder_reg,
-                                   Register scratch,
-                                   int save_at_depth,
-                                   Label* miss) {
-  // Make sure there's no overlap between scratch and the other
-  // registers.
-  ASSERT(!scratch.is(object_reg) && !scratch.is(holder_reg));
-
-  // Keep track of the current object in register reg.
-  Register reg = object_reg;
-  int depth = 0;
-
-  if (save_at_depth == depth) {
-    str(reg, MemOperand(sp));
-  }
-
-  // Check the maps in the prototype chain.
-  // Traverse the prototype chain from the object and do map checks.
-  while (object != holder) {
-    depth++;
-
-    // Only global objects and objects that do not require access
-    // checks are allowed in stubs.
-    ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
-
-    // Get the map of the current object.
-    ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset));
-    cmp(scratch, Operand(Handle<Map>(object->map())));
-
-    // Branch on the result of the map check.
-    b(ne, miss);
-
-    // 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 (object->IsJSGlobalProxy()) {
-      CheckAccessGlobalProxy(reg, scratch, miss);
-      // Restore scratch register to be the map of the object.  In the
-      // new space case below, we load the prototype from the map in
-      // the scratch register.
-      ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset));
-    }
-
-    reg = holder_reg;  // from now the object is in holder_reg
-    JSObject* prototype = JSObject::cast(object->GetPrototype());
-    if (Heap::InNewSpace(prototype)) {
-      // The prototype is in new space; we cannot store a reference
-      // to it in the code. Load it from the map.
-      ldr(reg, FieldMemOperand(scratch, Map::kPrototypeOffset));
-    } else {
-      // The prototype is in old space; load it directly.
-      mov(reg, Operand(Handle<JSObject>(prototype)));
-    }
-
-    if (save_at_depth == depth) {
-      str(reg, MemOperand(sp));
-    }
-
-    // Go to the next object in the prototype chain.
-    object = prototype;
-  }
-
-  // Check the holder map.
-  ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset));
-  cmp(scratch, Operand(Handle<Map>(object->map())));
-  b(ne, miss);
-
-  // Log the check depth.
-  LOG(IntEvent("check-maps-depth", depth + 1));
-
-  // Perform security check for access to the global object and return
-  // the holder register.
-  ASSERT(object == holder);
-  ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
-  if (object->IsJSGlobalProxy()) {
-    CheckAccessGlobalProxy(reg, scratch, miss);
-  }
-  return reg;
-}
-
-
 void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
                                             Register scratch,
                                             Label* miss) {
   Label same_contexts;
 
   ASSERT(!holder_reg.is(scratch));
   ASSERT(!holder_reg.is(ip));
   ASSERT(!scratch.is(ip));
 
   // Load current lexical context from the stack frame.
@@ skipping 966 matching lines @@
 
 void CodePatcher::Emit(Address addr) {
   masm()->emit(reinterpret_cast<Instr>(addr));
 }
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM