stub-cache-ia32.cc 76.5 KB
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// Copyright 2006-2009 the V8 project authors. All rights reserved.
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// 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.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "v8.h"

#include "ic-inl.h"
#include "codegen-inl.h"
#include "stub-cache.h"

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namespace v8 {
namespace internal {
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#define __ ACCESS_MASM(masm)
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static void ProbeTable(MacroAssembler* masm,
                       Code::Flags flags,
                       StubCache::Table table,
                       Register name,
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                       Register offset,
                       Register extra) {
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  ExternalReference key_offset(SCTableReference::keyReference(table));
  ExternalReference value_offset(SCTableReference::valueReference(table));

  Label miss;

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  if (extra.is_valid()) {
    // Get the code entry from the cache.
    __ mov(extra, Operand::StaticArray(offset, times_2, value_offset));

    // Check that the key in the entry matches the name.
    __ cmp(name, Operand::StaticArray(offset, times_2, key_offset));
    __ j(not_equal, &miss, not_taken);

    // Check that the flags match what we're looking for.
    __ mov(offset, FieldOperand(extra, Code::kFlagsOffset));
    __ and_(offset, ~Code::kFlagsNotUsedInLookup);
    __ cmp(offset, flags);
    __ j(not_equal, &miss);

    // Jump to the first instruction in the code stub.
    __ add(Operand(extra), Immediate(Code::kHeaderSize - kHeapObjectTag));
    __ jmp(Operand(extra));

    __ bind(&miss);
  } else {
    // Save the offset on the stack.
    __ push(offset);

    // Check that the key in the entry matches the name.
    __ cmp(name, Operand::StaticArray(offset, times_2, key_offset));
    __ j(not_equal, &miss, not_taken);

    // Get the code entry from the cache.
    __ mov(offset, Operand::StaticArray(offset, times_2, value_offset));

    // Check that the flags match what we're looking for.
    __ mov(offset, FieldOperand(offset, Code::kFlagsOffset));
    __ and_(offset, ~Code::kFlagsNotUsedInLookup);
    __ cmp(offset, flags);
    __ j(not_equal, &miss);

    // Restore offset and re-load code entry from cache.
    __ pop(offset);
    __ mov(offset, Operand::StaticArray(offset, times_2, value_offset));

    // Jump to the first instruction in the code stub.
    __ add(Operand(offset), Immediate(Code::kHeaderSize - kHeapObjectTag));
    __ jmp(Operand(offset));

    // Pop at miss.
    __ bind(&miss);
    __ pop(offset);
  }
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}


void StubCache::GenerateProbe(MacroAssembler* masm,
                              Code::Flags flags,
                              Register receiver,
                              Register name,
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                              Register scratch,
                              Register extra) {
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  Label miss;

  // Make sure that code is valid. The shifting code relies on the
  // entry size being 8.
  ASSERT(sizeof(Entry) == 8);

  // Make sure the flags does not name a specific type.
  ASSERT(Code::ExtractTypeFromFlags(flags) == 0);

  // Make sure that there are no register conflicts.
  ASSERT(!scratch.is(receiver));
  ASSERT(!scratch.is(name));
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  ASSERT(!extra.is(receiver));
  ASSERT(!extra.is(name));
  ASSERT(!extra.is(scratch));
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  // Check that the receiver isn't a smi.
  __ test(receiver, Immediate(kSmiTagMask));
  __ j(zero, &miss, not_taken);

  // Get the map of the receiver and compute the hash.
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  __ mov(scratch, FieldOperand(name, String::kHashFieldOffset));
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  __ add(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
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  __ xor_(scratch, flags);
  __ and_(scratch, (kPrimaryTableSize - 1) << kHeapObjectTagSize);

  // Probe the primary table.
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  ProbeTable(masm, flags, kPrimary, name, scratch, extra);
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  // Primary miss: Compute hash for secondary probe.
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  __ mov(scratch, FieldOperand(name, String::kHashFieldOffset));
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  __ add(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
  __ xor_(scratch, flags);
  __ and_(scratch, (kPrimaryTableSize - 1) << kHeapObjectTagSize);
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  __ sub(scratch, Operand(name));
  __ add(Operand(scratch), Immediate(flags));
  __ and_(scratch, (kSecondaryTableSize - 1) << kHeapObjectTagSize);

  // Probe the secondary table.
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  ProbeTable(masm, flags, kSecondary, name, scratch, extra);
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  // Cache miss: Fall-through and let caller handle the miss by
  // entering the runtime system.
  __ bind(&miss);
}


void StubCompiler::GenerateLoadGlobalFunctionPrototype(MacroAssembler* masm,
                                                       int index,
                                                       Register prototype) {
  // Load the global or builtins object from the current context.
  __ mov(prototype, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX)));
  // Load the global context from the global or builtins object.
  __ mov(prototype,
         FieldOperand(prototype, GlobalObject::kGlobalContextOffset));
  // Load the function from the global context.
  __ mov(prototype, Operand(prototype, Context::SlotOffset(index)));
  // Load the initial map.  The global functions all have initial maps.
  __ mov(prototype,
         FieldOperand(prototype, JSFunction::kPrototypeOrInitialMapOffset));
  // Load the prototype from the initial map.
  __ mov(prototype, FieldOperand(prototype, Map::kPrototypeOffset));
}


void StubCompiler::GenerateLoadArrayLength(MacroAssembler* masm,
                                           Register receiver,
                                           Register scratch,
                                           Label* miss_label) {
  // Check that the receiver isn't a smi.
  __ test(receiver, Immediate(kSmiTagMask));
  __ j(zero, miss_label, not_taken);

  // Check that the object is a JS array.
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  __ CmpObjectType(receiver, JS_ARRAY_TYPE, scratch);
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  __ j(not_equal, miss_label, not_taken);

  // Load length directly from the JS array.
  __ mov(eax, FieldOperand(receiver, JSArray::kLengthOffset));
  __ ret(0);
}


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// Generate code to check if an object is a string.  If the object is
// a string, the map's instance type is left in the scratch register.
static void GenerateStringCheck(MacroAssembler* masm,
                                Register receiver,
                                Register scratch,
                                Label* smi,
                                Label* non_string_object) {
  // Check that the object isn't a smi.
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  __ test(receiver, Immediate(kSmiTagMask));
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  __ j(zero, smi, not_taken);
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  // Check that the object is a string.
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  __ mov(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
  __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
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  ASSERT(kNotStringTag != 0);
  __ test(scratch, Immediate(kNotStringTag));
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  __ j(not_zero, non_string_object, not_taken);
}
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void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm,
                                            Register receiver,
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                                            Register scratch1,
                                            Register scratch2,
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                                            Label* miss) {
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  Label check_wrapper;
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  // Check if the object is a string leaving the instance type in the
  // scratch register.
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  GenerateStringCheck(masm, receiver, scratch1, miss, &check_wrapper);
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  // Load length from the string and convert to a smi.
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  __ mov(eax, FieldOperand(receiver, String::kLengthOffset));
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  __ SmiTag(eax);
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  __ ret(0);
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  // Check if the object is a JSValue wrapper.
  __ bind(&check_wrapper);
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  __ cmp(scratch1, JS_VALUE_TYPE);
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  __ j(not_equal, miss, not_taken);

  // Check if the wrapped value is a string and load the length
  // directly if it is.
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  __ mov(scratch2, FieldOperand(receiver, JSValue::kValueOffset));
  GenerateStringCheck(masm, scratch2, scratch1, miss, miss);
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  __ mov(eax, FieldOperand(scratch2, String::kLengthOffset));
  __ SmiTag(eax);
  __ ret(0);
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}


void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm,
                                                 Register receiver,
                                                 Register scratch1,
                                                 Register scratch2,
                                                 Label* miss_label) {
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  __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label);
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  __ mov(eax, Operand(scratch1));
  __ ret(0);
}


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// Load a fast property out of a holder object (src). In-object properties
// are loaded directly otherwise the property is loaded from the properties
// fixed array.
void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
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                                            Register dst, Register src,
                                            JSObject* holder, int index) {
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  // Adjust for the number of properties stored in the holder.
  index -= holder->map()->inobject_properties();
  if (index < 0) {
    // Get the property straight out of the holder.
    int offset = holder->map()->instance_size() + (index * kPointerSize);
    __ mov(dst, FieldOperand(src, offset));
  } else {
    // Calculate the offset into the properties array.
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    int offset = index * kPointerSize + FixedArray::kHeaderSize;
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    __ mov(dst, FieldOperand(src, JSObject::kPropertiesOffset));
    __ mov(dst, FieldOperand(dst, offset));
  }
}


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static void PushInterceptorArguments(MacroAssembler* masm,
                                     Register receiver,
                                     Register holder,
                                     Register name,
                                     JSObject* holder_obj) {
  __ push(receiver);
  __ push(holder);
  __ push(name);
  InterceptorInfo* interceptor = holder_obj->GetNamedInterceptor();
  ASSERT(!Heap::InNewSpace(interceptor));
  __ mov(receiver, Immediate(Handle<Object>(interceptor)));
  __ push(receiver);
  __ push(FieldOperand(receiver, InterceptorInfo::kDataOffset));
}


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static void CompileCallLoadPropertyWithInterceptor(MacroAssembler* masm,
                                                   Register receiver,
                                                   Register holder,
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                                                   Register name,
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                                                   JSObject* holder_obj) {
  PushInterceptorArguments(masm, receiver, holder, name, holder_obj);
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  __ CallExternalReference(
        ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorOnly)),
        5);
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}


template <class Compiler>
static void CompileLoadInterceptor(Compiler* compiler,
                                   StubCompiler* stub_compiler,
                                   MacroAssembler* masm,
                                   JSObject* object,
                                   JSObject* holder,
                                   String* name,
                                   LookupResult* lookup,
                                   Register receiver,
                                   Register scratch1,
                                   Register scratch2,
                                   Label* miss) {
  ASSERT(holder->HasNamedInterceptor());
  ASSERT(!holder->GetNamedInterceptor()->getter()->IsUndefined());

  // Check that the receiver isn't a smi.
  __ test(receiver, Immediate(kSmiTagMask));
  __ j(zero, miss, not_taken);

  // Check that the maps haven't changed.
  Register reg =
      stub_compiler->CheckPrototypes(object, receiver, holder,
                                     scratch1, scratch2, name, miss);

  if (lookup->IsValid() && lookup->IsCacheable()) {
    compiler->CompileCacheable(masm,
                               stub_compiler,
                               receiver,
                               reg,
                               scratch1,
                               scratch2,
                               holder,
                               lookup,
                               name,
                               miss);
  } else {
    compiler->CompileRegular(masm,
                             receiver,
                             reg,
                             scratch2,
                             holder,
                             miss);
  }
}


class LoadInterceptorCompiler BASE_EMBEDDED {
 public:
  explicit LoadInterceptorCompiler(Register name) : name_(name) {}

  void CompileCacheable(MacroAssembler* masm,
                        StubCompiler* stub_compiler,
                        Register receiver,
                        Register holder,
                        Register scratch1,
                        Register scratch2,
                        JSObject* holder_obj,
                        LookupResult* lookup,
                        String* name,
                        Label* miss_label) {
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    AccessorInfo* callback = NULL;
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    bool optimize = false;
    // So far the most popular follow ups for interceptor loads are FIELD
    // and CALLBACKS, so inline only them, other cases may be added
    // later.
    if (lookup->type() == FIELD) {
      optimize = true;
    } else if (lookup->type() == CALLBACKS) {
      Object* callback_object = lookup->GetCallbackObject();
      if (callback_object->IsAccessorInfo()) {
        callback = AccessorInfo::cast(callback_object);
        optimize = callback->getter() != NULL;
      }
    }

    if (!optimize) {
      CompileRegular(masm, receiver, holder, scratch2, holder_obj, miss_label);
      return;
    }

    // Note: starting a frame here makes GC aware of pointers pushed below.
    __ EnterInternalFrame();

    if (lookup->type() == CALLBACKS) {
      __ push(receiver);
    }
    __ push(holder);
    __ push(name_);

    CompileCallLoadPropertyWithInterceptor(masm,
                                           receiver,
                                           holder,
                                           name_,
                                           holder_obj);

    Label interceptor_failed;
    __ cmp(eax, Factory::no_interceptor_result_sentinel());
    __ j(equal, &interceptor_failed);
    __ LeaveInternalFrame();
    __ ret(0);

    __ bind(&interceptor_failed);
    __ pop(name_);
    __ pop(holder);
    if (lookup->type() == CALLBACKS) {
      __ pop(receiver);
    }

    __ LeaveInternalFrame();

    if (lookup->type() == FIELD) {
      holder = stub_compiler->CheckPrototypes(holder_obj, holder,
                                              lookup->holder(), scratch1,
                                              scratch2,
                                              name,
                                              miss_label);
      stub_compiler->GenerateFastPropertyLoad(masm, eax,
                                              holder, lookup->holder(),
                                              lookup->GetFieldIndex());
      __ ret(0);
    } else {
      ASSERT(lookup->type() == CALLBACKS);
      ASSERT(lookup->GetCallbackObject()->IsAccessorInfo());
      ASSERT(callback != NULL);
      ASSERT(callback->getter() != NULL);

      Label cleanup;
      __ pop(scratch2);
      __ push(receiver);
      __ push(scratch2);

      holder = stub_compiler->CheckPrototypes(holder_obj, holder,
                                              lookup->holder(), scratch1,
                                              scratch2,
                                              name,
                                              &cleanup);

      __ pop(scratch2);  // save old return address
      __ push(holder);
      __ mov(holder, Immediate(Handle<AccessorInfo>(callback)));
      __ push(holder);
      __ push(FieldOperand(holder, AccessorInfo::kDataOffset));
      __ push(name_);
      __ push(scratch2);  // restore old return address

      ExternalReference ref =
          ExternalReference(IC_Utility(IC::kLoadCallbackProperty));
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      __ TailCallRuntime(ref, 5, 1);
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      __ bind(&cleanup);
      __ pop(scratch1);
      __ pop(scratch2);
      __ push(scratch1);
    }
  }


  void CompileRegular(MacroAssembler* masm,
                      Register receiver,
                      Register holder,
                      Register scratch,
                      JSObject* holder_obj,
                      Label* miss_label) {
    __ pop(scratch);  // save old return address
    PushInterceptorArguments(masm, receiver, holder, name_, holder_obj);
    __ push(scratch);  // restore old return address

    ExternalReference ref = ExternalReference(
        IC_Utility(IC::kLoadPropertyWithInterceptorForLoad));
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    __ TailCallRuntime(ref, 5, 1);
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  }

 private:
  Register name_;
};


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// Holds information about possible function call optimizations.
class CallOptimization BASE_EMBEDDED {
 public:
  explicit CallOptimization(LookupResult* lookup)
    : constant_function_(NULL),
      is_simple_api_call_(false),
      expected_receiver_type_(NULL),
      api_call_info_(NULL) {
    if (!lookup->IsValid() || !lookup->IsCacheable()) return;

    // We only optimize constant function calls.
    if (lookup->type() != CONSTANT_FUNCTION) return;

    Initialize(lookup->GetConstantFunction());
  }

  explicit CallOptimization(JSFunction* function) {
    Initialize(function);
  }

  bool is_constant_call() const {
    return constant_function_ != NULL;
  }

  JSFunction* constant_function() const {
    ASSERT(constant_function_ != NULL);
    return constant_function_;
  }

  bool is_simple_api_call() const {
    return is_simple_api_call_;
  }

  FunctionTemplateInfo* expected_receiver_type() const {
    ASSERT(is_simple_api_call_);
    return expected_receiver_type_;
  }

  CallHandlerInfo* api_call_info() const {
    ASSERT(is_simple_api_call_);
    return api_call_info_;
  }

  // Returns the depth of the object having the expected type in the
  // prototype chain between the two arguments.
  int GetPrototypeDepthOfExpectedType(JSObject* object,
                                      JSObject* holder) const {
    ASSERT(is_simple_api_call_);
    if (expected_receiver_type_ == NULL) return 0;
    int depth = 0;
    while (object != holder) {
      if (object->IsInstanceOf(expected_receiver_type_)) return depth;
      object = JSObject::cast(object->GetPrototype());
      ++depth;
    }
    if (holder->IsInstanceOf(expected_receiver_type_)) return depth;
    return kInvalidProtoDepth;
  }

 private:
  void Initialize(JSFunction* function) {
    if (!function->is_compiled()) return;

    constant_function_ = function;
    is_simple_api_call_ = false;

    AnalyzePossibleApiFunction(function);
  }

  // Determines whether the given function can be called using the
  // fast api call builtin.
  void AnalyzePossibleApiFunction(JSFunction* function) {
    SharedFunctionInfo* sfi = function->shared();
    if (sfi->function_data()->IsUndefined()) return;
    FunctionTemplateInfo* info =
        FunctionTemplateInfo::cast(sfi->function_data());

    // Require a C++ callback.
    if (info->call_code()->IsUndefined()) return;
    api_call_info_ = CallHandlerInfo::cast(info->call_code());

    // Accept signatures that either have no restrictions at all or
    // only have restrictions on the receiver.
    if (!info->signature()->IsUndefined()) {
      SignatureInfo* signature = SignatureInfo::cast(info->signature());
      if (!signature->args()->IsUndefined()) return;
      if (!signature->receiver()->IsUndefined()) {
        expected_receiver_type_ =
            FunctionTemplateInfo::cast(signature->receiver());
      }
    }

    is_simple_api_call_ = true;
  }

  JSFunction* constant_function_;
  bool is_simple_api_call_;
  FunctionTemplateInfo* expected_receiver_type_;
  CallHandlerInfo* api_call_info_;
};


// Reserves space for the extra arguments to FastHandleApiCall in the
// caller's frame.
//
// These arguments are set by CheckPrototypes and GenerateFastApiCall.
static void ReserveSpaceForFastApiCall(MacroAssembler* masm, Register scratch) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : last argument in the internal frame of the caller
  // -----------------------------------
  __ pop(scratch);
  __ push(Immediate(Smi::FromInt(0)));
  __ push(Immediate(Smi::FromInt(0)));
  __ push(Immediate(Smi::FromInt(0)));
  __ push(Immediate(Smi::FromInt(0)));
  __ push(scratch);
}


// Undoes the effects of ReserveSpaceForFastApiCall.
static void FreeSpaceForFastApiCall(MacroAssembler* masm, Register scratch) {
  // ----------- S t a t e -------------
  //  -- esp[0]  : return address
  //  -- esp[4]  : last fast api call extra argument
  //  -- ...
  //  -- esp[16] : first fast api call extra argument
  //  -- esp[20] : last argument in the internal frame
  // -----------------------------------
  __ pop(scratch);
  __ add(Operand(esp), Immediate(kPointerSize * 4));
  __ push(scratch);
}


// Generates call to FastHandleApiCall builtin.
static void GenerateFastApiCall(MacroAssembler* masm,
                                const CallOptimization& optimization,
                                int argc) {
  // ----------- S t a t e -------------
  //  -- esp[0]              : return address
  //  -- esp[4]              : object passing the type check
  //                           (last fast api call extra argument,
  //                            set by CheckPrototypes)
  //  -- esp[8]              : api call data
  //  -- esp[12]             : api callback
  //  -- esp[16]             : api function
  //                           (first fast api call extra argument)
  //  -- esp[20]             : last argument
  //  -- ...
  //  -- esp[(argc + 5) * 4] : first argument
  //  -- esp[(argc + 6) * 4] : receiver
  // -----------------------------------

  // Get the function and setup the context.
  JSFunction* function = optimization.constant_function();
  __ mov(edi, Immediate(Handle<JSFunction>(function)));
  __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));

  // Pass the additional arguments FastHandleApiCall expects.
  __ mov(Operand(esp, 4 * kPointerSize), edi);
  bool info_loaded = false;
  Object* callback = optimization.api_call_info()->callback();
  if (Heap::InNewSpace(callback)) {
    info_loaded = true;
    __ mov(ecx, Handle<CallHandlerInfo>(optimization.api_call_info()));
    __ mov(ebx, FieldOperand(ecx, CallHandlerInfo::kCallbackOffset));
    __ mov(Operand(esp, 3 * kPointerSize), ebx);
  } else {
    __ mov(Operand(esp, 3 * kPointerSize), Immediate(Handle<Object>(callback)));
  }
  Object* call_data = optimization.api_call_info()->data();
  if (Heap::InNewSpace(call_data)) {
    if (!info_loaded) {
      __ mov(ecx, Handle<CallHandlerInfo>(optimization.api_call_info()));
    }
    __ mov(ebx, FieldOperand(ecx, CallHandlerInfo::kDataOffset));
    __ mov(Operand(esp, 2 * kPointerSize), ebx);
  } else {
    __ mov(Operand(esp, 2 * kPointerSize),
           Immediate(Handle<Object>(call_data)));
  }

  // Set the number of arguments.
  __ mov(eax, Immediate(argc + 4));

  // Jump to the fast api call builtin (tail call).
  Handle<Code> code = Handle<Code>(
      Builtins::builtin(Builtins::FastHandleApiCall));
  ParameterCount expected(0);
  __ InvokeCode(code, expected, expected,
                RelocInfo::CODE_TARGET, JUMP_FUNCTION);
}


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class CallInterceptorCompiler BASE_EMBEDDED {
 public:
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  CallInterceptorCompiler(StubCompiler* stub_compiler,
                          const ParameterCount& arguments,
                          Register name)
      : stub_compiler_(stub_compiler),
        arguments_(arguments),
        name_(name) {}

  void Compile(MacroAssembler* masm,
               JSObject* object,
               JSObject* holder,
               String* name,
               LookupResult* lookup,
               Register receiver,
               Register scratch1,
               Register scratch2,
               Label* miss) {
    ASSERT(holder->HasNamedInterceptor());
    ASSERT(!holder->GetNamedInterceptor()->getter()->IsUndefined());

    // Check that the receiver isn't a smi.
    __ test(receiver, Immediate(kSmiTagMask));
    __ j(zero, miss, not_taken);

    CallOptimization optimization(lookup);

    if (optimization.is_constant_call() &&
        !Top::CanHaveSpecialFunctions(holder)) {
      CompileCacheable(masm,
                       object,
                       receiver,
                       scratch1,
                       scratch2,
                       holder,
                       lookup,
                       name,
                       optimization,
                       miss);
    } else {
      CompileRegular(masm,
                     object,
                     receiver,
                     scratch1,
                     scratch2,
                     name,
                     holder,
                     miss);
    }
  }
724

725
 private:
726
  void CompileCacheable(MacroAssembler* masm,
727
                        JSObject* object,
728 729 730 731 732 733
                        Register receiver,
                        Register scratch1,
                        Register scratch2,
                        JSObject* holder_obj,
                        LookupResult* lookup,
                        String* name,
734
                        const CallOptimization& optimization,
735
                        Label* miss_label) {
736
    ASSERT(optimization.is_constant_call());
737
    ASSERT(!lookup->holder()->IsGlobalObject());
738 739 740 741 742 743 744 745 746 747

    int depth1 = kInvalidProtoDepth;
    int depth2 = kInvalidProtoDepth;
    bool can_do_fast_api_call = false;
    if (optimization.is_simple_api_call() &&
        !lookup->holder()->IsGlobalObject()) {
      depth1 = optimization.GetPrototypeDepthOfExpectedType(object, holder_obj);
      if (depth1 == kInvalidProtoDepth) {
        depth2 = optimization.GetPrototypeDepthOfExpectedType(holder_obj,
                                                              lookup->holder());
748
      }
749 750
      can_do_fast_api_call = (depth1 != kInvalidProtoDepth) ||
                             (depth2 != kInvalidProtoDepth);
751 752
    }

753 754 755 756 757
    __ IncrementCounter(&Counters::call_const_interceptor, 1);

    if (can_do_fast_api_call) {
      __ IncrementCounter(&Counters::call_const_interceptor_fast_api, 1);
      ReserveSpaceForFastApiCall(masm, scratch1);
758 759
    }

760 761 762 763 764 765
    Label miss_cleanup;
    Label* miss = can_do_fast_api_call ? &miss_cleanup : miss_label;
    Register holder =
        stub_compiler_->CheckPrototypes(object, receiver, holder_obj,
                                        scratch1, scratch2, name,
                                        depth1, miss);
766

767 768
    Label regular_invoke;
    LoadWithInterceptor(masm, receiver, holder, holder_obj, &regular_invoke);
769

770 771 772 773 774 775 776
    // Generate code for the failed interceptor case.

    // Check the lookup is still valid.
    stub_compiler_->CheckPrototypes(holder_obj, receiver,
                                    lookup->holder(),
                                    scratch1, scratch2, name,
                                    depth2, miss);
777

778
    if (can_do_fast_api_call) {
779
      GenerateFastApiCall(masm, optimization, arguments_.immediate());
780
    } else {
781 782
      __ InvokeFunction(optimization.constant_function(), arguments_,
                        JUMP_FUNCTION);
783
    }
784

785 786 787 788 789
    if (can_do_fast_api_call) {
      __ bind(&miss_cleanup);
      FreeSpaceForFastApiCall(masm, scratch1);
      __ jmp(miss_label);
    }
790

791 792 793 794
    __ bind(&regular_invoke);
    if (can_do_fast_api_call) {
      FreeSpaceForFastApiCall(masm, scratch1);
    }
795 796 797
  }

  void CompileRegular(MacroAssembler* masm,
798
                      JSObject* object,
799
                      Register receiver,
800 801 802
                      Register scratch1,
                      Register scratch2,
                      String* name,
803 804
                      JSObject* holder_obj,
                      Label* miss_label) {
805 806 807 808 809
    Register holder =
        stub_compiler_->CheckPrototypes(object, receiver, holder_obj,
                                        scratch1, scratch2, name,
                                        miss_label);

810
    __ EnterInternalFrame();
811 812
    // Save the name_ register across the call.
    __ push(name_);
813 814 815 816

    PushInterceptorArguments(masm,
                             receiver,
                             holder,
817
                             name_,
818 819
                             holder_obj);

820 821 822 823
    __ CallExternalReference(
          ExternalReference(
              IC_Utility(IC::kLoadPropertyWithInterceptorForCall)),
          5);
824

825 826
    // Restore the name_ register.
    __ pop(name_);
827 828 829
    __ LeaveInternalFrame();
  }

830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853
  void LoadWithInterceptor(MacroAssembler* masm,
                           Register receiver,
                           Register holder,
                           JSObject* holder_obj,
                           Label* interceptor_succeeded) {
    __ EnterInternalFrame();
    __ push(holder);  // Save the holder.
    __ push(name_);  // Save the name.

    CompileCallLoadPropertyWithInterceptor(masm,
                                           receiver,
                                           holder,
                                           name_,
                                           holder_obj);

    __ pop(name_);  // Restore the name.
    __ pop(receiver);  // Restore the holder.
    __ LeaveInternalFrame();

    __ cmp(eax, Factory::no_interceptor_result_sentinel());
    __ j(not_equal, interceptor_succeeded);
  }

  StubCompiler* stub_compiler_;
854
  const ParameterCount& arguments_;
855
  Register name_;
856 857 858
};


859 860 861 862 863 864 865 866 867 868
void StubCompiler::GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind) {
  ASSERT(kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC);
  Code* code = NULL;
  if (kind == Code::LOAD_IC) {
    code = Builtins::builtin(Builtins::LoadIC_Miss);
  } else {
    code = Builtins::builtin(Builtins::KeyedLoadIC_Miss);
  }

  Handle<Code> ic(code);
869
  __ jmp(ic, RelocInfo::CODE_TARGET);
870 871 872
}


873 874
// Both name_reg and receiver_reg are preserved on jumps to miss_label,
// but may be destroyed if store is successful.
875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892
void StubCompiler::GenerateStoreField(MacroAssembler* masm,
                                      JSObject* object,
                                      int index,
                                      Map* transition,
                                      Register receiver_reg,
                                      Register name_reg,
                                      Register scratch,
                                      Label* miss_label) {
  // Check that the object isn't a smi.
  __ test(receiver_reg, Immediate(kSmiTagMask));
  __ j(zero, miss_label, not_taken);

  // Check that the map of the object hasn't changed.
  __ cmp(FieldOperand(receiver_reg, HeapObject::kMapOffset),
         Immediate(Handle<Map>(object->map())));
  __ j(not_equal, miss_label, not_taken);

  // Perform global security token check if needed.
893 894
  if (object->IsJSGlobalProxy()) {
    __ CheckAccessGlobalProxy(receiver_reg, scratch, miss_label);
895 896 897 898
  }

  // Stub never generated for non-global objects that require access
  // checks.
899
  ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
900

901 902 903
  // Perform map transition for the receiver if necessary.
  if ((transition != NULL) && (object->map()->unused_property_fields() == 0)) {
    // The properties must be extended before we can store the value.
904
    // We jump to a runtime call that extends the properties array.
905 906 907 908 909 910 911
    __ pop(scratch);  // Return address.
    __ push(receiver_reg);
    __ push(Immediate(Handle<Map>(transition)));
    __ push(eax);
    __ push(scratch);
    __ TailCallRuntime(
        ExternalReference(IC_Utility(IC::kSharedStoreIC_ExtendStorage)), 3, 1);
912 913 914
    return;
  }

915
  if (transition != NULL) {
916 917 918 919
    // Update the map of the object; no write barrier updating is
    // needed because the map is never in new space.
    __ mov(FieldOperand(receiver_reg, HeapObject::kMapOffset),
           Immediate(Handle<Map>(transition)));
920 921
  }

922 923 924 925 926
  // Adjust for the number of properties stored in the object. Even in the
  // face of a transition we can use the old map here because the size of the
  // object and the number of in-object properties is not going to change.
  index -= object->map()->inobject_properties();

927 928 929 930
  if (index < 0) {
    // Set the property straight into the object.
    int offset = object->map()->instance_size() + (index * kPointerSize);
    __ mov(FieldOperand(receiver_reg, offset), eax);
931

932 933 934 935 936 937
    // Update the write barrier for the array address.
    // Pass the value being stored in the now unused name_reg.
    __ mov(name_reg, Operand(eax));
    __ RecordWrite(receiver_reg, offset, name_reg, scratch);
  } else {
    // Write to the properties array.
938
    int offset = index * kPointerSize + FixedArray::kHeaderSize;
939 940
    // Get the properties array (optimistically).
    __ mov(scratch, FieldOperand(receiver_reg, JSObject::kPropertiesOffset));
941 942 943 944 945 946 947
    __ mov(FieldOperand(scratch, offset), eax);

    // Update the write barrier for the array address.
    // Pass the value being stored in the now unused name_reg.
    __ mov(name_reg, Operand(eax));
    __ RecordWrite(scratch, offset, name_reg, receiver_reg);
  }
948 949 950 951 952 953 954

  // Return the value (register eax).
  __ ret(0);
}


#undef __
955
#define __ ACCESS_MASM(masm())
956 957


958 959 960 961 962 963
Register StubCompiler::CheckPrototypes(JSObject* object,
                                       Register object_reg,
                                       JSObject* holder,
                                       Register holder_reg,
                                       Register scratch,
                                       String* name,
964
                                       int push_at_depth,
965 966 967
                                       Label* miss) {
  // Check that the maps haven't changed.
  Register result =
968 969
      masm()->CheckMaps(object, object_reg, holder, holder_reg, scratch,
                        push_at_depth, miss);
970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990

  // If we've skipped any global objects, it's not enough to verify
  // that their maps haven't changed.
  while (object != holder) {
    if (object->IsGlobalObject()) {
      GlobalObject* global = GlobalObject::cast(object);
      Object* probe = global->EnsurePropertyCell(name);
      if (probe->IsFailure()) {
        set_failure(Failure::cast(probe));
        return result;
      }
      JSGlobalPropertyCell* cell = JSGlobalPropertyCell::cast(probe);
      ASSERT(cell->value()->IsTheHole());
      __ mov(scratch, Immediate(Handle<Object>(cell)));
      __ cmp(FieldOperand(scratch, JSGlobalPropertyCell::kValueOffset),
             Immediate(Factory::the_hole_value()));
      __ j(not_equal, miss, not_taken);
    }
    object = JSObject::cast(object->GetPrototype());
  }

991
  // Return the register containing the holder.
992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018
  return result;
}


void StubCompiler::GenerateLoadField(JSObject* object,
                                     JSObject* holder,
                                     Register receiver,
                                     Register scratch1,
                                     Register scratch2,
                                     int index,
                                     String* name,
                                     Label* miss) {
  // Check that the receiver isn't a smi.
  __ test(receiver, Immediate(kSmiTagMask));
  __ j(zero, miss, not_taken);

  // Check the prototype chain.
  Register reg =
      CheckPrototypes(object, receiver, holder,
                      scratch1, scratch2, name, miss);

  // Get the value from the properties.
  GenerateFastPropertyLoad(masm(), eax, reg, holder, index);
  __ ret(0);
}


1019
bool StubCompiler::GenerateLoadCallback(JSObject* object,
1020 1021 1022 1023 1024 1025 1026
                                        JSObject* holder,
                                        Register receiver,
                                        Register name_reg,
                                        Register scratch1,
                                        Register scratch2,
                                        AccessorInfo* callback,
                                        String* name,
1027 1028
                                        Label* miss,
                                        Failure** failure) {
1029 1030 1031 1032 1033 1034 1035 1036 1037
  // Check that the receiver isn't a smi.
  __ test(receiver, Immediate(kSmiTagMask));
  __ j(zero, miss, not_taken);

  // Check that the maps haven't changed.
  Register reg =
      CheckPrototypes(object, receiver, holder,
                      scratch1, scratch2, name, miss);

1038 1039 1040 1041 1042 1043 1044 1045 1046
  Handle<AccessorInfo> callback_handle(callback);

  Register other = reg.is(scratch1) ? scratch2 : scratch1;
  __ EnterInternalFrame();
  __ PushHandleScope(other);
  // Push the stack address where the list of arguments ends
  __ mov(other, esp);
  __ sub(Operand(other), Immediate(2 * kPointerSize));
  __ push(other);
1047 1048
  __ push(receiver);  // receiver
  __ push(reg);  // holder
1049 1050 1051
  __ mov(other, Immediate(callback_handle));
  __ push(other);
  __ push(FieldOperand(other, AccessorInfo::kDataOffset));  // data
1052
  __ push(name_reg);  // name
1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063
  // Save a pointer to where we pushed the arguments pointer.
  // This will be passed as the const Arguments& to the C++ callback.
  __ mov(eax, esp);
  __ add(Operand(eax), Immediate(5 * kPointerSize));
  __ mov(ebx, esp);

  // Do call through the api.
  ASSERT_EQ(6, ApiGetterEntryStub::kStackSpace);
  Address getter_address = v8::ToCData<Address>(callback->getter());
  ApiFunction fun(getter_address);
  ApiGetterEntryStub stub(callback_handle, &fun);
1064 1065 1066 1067
  // Emitting a stub call may try to allocate (if the code is not
  // already generated).  Do not allow the assembler to perform a
  // garbage collection but instead return the allocation failure
  // object.
1068 1069 1070 1071 1072
  Object* result = masm()->TryCallStub(&stub);
  if (result->IsFailure()) {
    *failure = Failure::cast(result);
    return false;
  }
1073

1074
  // We need to avoid using eax since that now holds the result.
1075
  Register tmp = other.is(eax) ? reg : other;
1076 1077 1078 1079 1080 1081 1082 1083
  // Emitting PopHandleScope may try to allocate.  Do not allow the
  // assembler to perform a garbage collection but instead return a
  // failure object.
  result = masm()->TryPopHandleScope(eax, tmp);
  if (result->IsFailure()) {
    *failure = Failure::cast(result);
    return false;
  }
1084
  __ LeaveInternalFrame();
1085

1086
  __ ret(0);
1087
  return true;
1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
}


void StubCompiler::GenerateLoadConstant(JSObject* object,
                                        JSObject* holder,
                                        Register receiver,
                                        Register scratch1,
                                        Register scratch2,
                                        Object* value,
                                        String* name,
                                        Label* miss) {
  // Check that the receiver isn't a smi.
  __ test(receiver, Immediate(kSmiTagMask));
  __ j(zero, miss, not_taken);

  // Check that the maps haven't changed.
  Register reg =
      CheckPrototypes(object, receiver, holder,
                      scratch1, scratch2, name, miss);

  // Return the constant value.
  __ mov(eax, Handle<Object>(value));
  __ ret(0);
}


void StubCompiler::GenerateLoadInterceptor(JSObject* object,
                                           JSObject* holder,
1116
                                           LookupResult* lookup,
1117 1118 1119 1120 1121 1122
                                           Register receiver,
                                           Register name_reg,
                                           Register scratch1,
                                           Register scratch2,
                                           String* name,
                                           Label* miss) {
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134
  LoadInterceptorCompiler compiler(name_reg);
  CompileLoadInterceptor(&compiler,
                         this,
                         masm(),
                         object,
                         holder,
                         name,
                         lookup,
                         receiver,
                         scratch1,
                         scratch2,
                         miss);
1135 1136 1137
}


1138 1139 1140 1141
// TODO(1241006): Avoid having lazy compile stubs specialized by the
// number of arguments. It is not needed anymore.
Object* StubCompiler::CompileLazyCompile(Code::Flags flags) {
  // Enter an internal frame.
1142
  __ EnterInternalFrame();
1143 1144 1145 1146 1147 1148 1149 1150

  // Push a copy of the function onto the stack.
  __ push(edi);

  __ push(edi);  // function is also the parameter to the runtime call
  __ CallRuntime(Runtime::kLazyCompile, 1);
  __ pop(edi);

1151
  // Tear down temporary frame.
1152
  __ LeaveInternalFrame();
1153 1154 1155 1156 1157

  // Do a tail-call of the compiled function.
  __ lea(ecx, FieldOperand(eax, Code::kHeaderSize));
  __ jmp(Operand(ecx));

1158
  return GetCodeWithFlags(flags, "LazyCompileStub");
1159 1160 1161
}


1162
Object* CallStubCompiler::CompileCallField(JSObject* object,
1163
                                           JSObject* holder,
1164
                                           int index,
1165
                                           String* name) {
1166
  // ----------- S t a t e -------------
1167 1168 1169 1170 1171
  //  -- ecx                 : name
  //  -- esp[0]              : return address
  //  -- esp[(argc - n) * 4] : arg[n] (zero-based)
  //  -- ...
  //  -- esp[(argc + 1) * 4] : receiver
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183
  // -----------------------------------
  Label miss;

  // Get the receiver from the stack.
  const int argc = arguments().immediate();
  __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));

  // Check that the receiver isn't a smi.
  __ test(edx, Immediate(kSmiTagMask));
  __ j(zero, &miss, not_taken);

  // Do the right check and compute the holder register.
1184
  Register reg = CheckPrototypes(object, edx, holder, ebx, eax, name, &miss);
1185

1186
  GenerateFastPropertyLoad(masm(), edi, reg, holder, index);
1187 1188 1189 1190

  // Check that the function really is a function.
  __ test(edi, Immediate(kSmiTagMask));
  __ j(zero, &miss, not_taken);
1191
  __ CmpObjectType(edi, JS_FUNCTION_TYPE, ebx);
1192 1193
  __ j(not_equal, &miss, not_taken);

1194 1195
  // Patch the receiver on the stack with the global proxy if
  // necessary.
1196
  if (object->IsGlobalObject()) {
1197 1198
    __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset));
    __ mov(Operand(esp, (argc + 1) * kPointerSize), edx);
1199 1200
  }

1201 1202 1203 1204 1205 1206
  // Invoke the function.
  __ InvokeFunction(edi, arguments(), JUMP_FUNCTION);

  // Handle call cache miss.
  __ bind(&miss);
  Handle<Code> ic = ComputeCallMiss(arguments().immediate());
1207
  __ jmp(ic, RelocInfo::CODE_TARGET);
1208 1209

  // Return the generated code.
1210
  return GetCode(FIELD, name);
1211 1212 1213 1214 1215 1216
}


Object* CallStubCompiler::CompileCallConstant(Object* object,
                                              JSObject* holder,
                                              JSFunction* function,
1217
                                              String* name,
1218
                                              CheckType check) {
1219
  // ----------- S t a t e -------------
1220 1221 1222 1223 1224
  //  -- ecx                 : name
  //  -- esp[0]              : return address
  //  -- esp[(argc - n) * 4] : arg[n] (zero-based)
  //  -- ...
  //  -- esp[(argc + 1) * 4] : receiver
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237
  // -----------------------------------
  Label miss;

  // Get the receiver from the stack.
  const int argc = arguments().immediate();
  __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));

  // Check that the receiver isn't a smi.
  if (check != NUMBER_CHECK) {
    __ test(edx, Immediate(kSmiTagMask));
    __ j(zero, &miss, not_taken);
  }

1238 1239 1240 1241
  // Make sure that it's okay not to patch the on stack receiver
  // unless we're doing a receiver map check.
  ASSERT(!object->IsGlobalObject() || check == RECEIVER_MAP_CHECK);

1242 1243 1244
  CallOptimization optimization(function);
  int depth = kInvalidProtoDepth;

1245 1246
  switch (check) {
    case RECEIVER_MAP_CHECK:
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
      __ IncrementCounter(&Counters::call_const, 1);

      if (optimization.is_simple_api_call() && !object->IsGlobalObject()) {
        depth = optimization.GetPrototypeDepthOfExpectedType(
            JSObject::cast(object), holder);
      }

      if (depth != kInvalidProtoDepth) {
        __ IncrementCounter(&Counters::call_const_fast_api, 1);
        ReserveSpaceForFastApiCall(masm(), eax);
      }

1259
      // Check that the maps haven't changed.
1260
      CheckPrototypes(JSObject::cast(object), edx, holder,
1261
                      ebx, eax, name, depth, &miss);
1262 1263 1264 1265

      // Patch the receiver on the stack with the global proxy if
      // necessary.
      if (object->IsGlobalObject()) {
1266
        ASSERT(depth == kInvalidProtoDepth);
1267 1268 1269
        __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset));
        __ mov(Operand(esp, (argc + 1) * kPointerSize), edx);
      }
1270 1271 1272
      break;

    case STRING_CHECK:
1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288
      if (!function->IsBuiltin()) {
        // Calling non-builtins with a value as receiver requires boxing.
        __ jmp(&miss);
      } else {
        // Check that the object is a string or a symbol.
        __ mov(eax, FieldOperand(edx, HeapObject::kMapOffset));
        __ movzx_b(eax, FieldOperand(eax, Map::kInstanceTypeOffset));
        __ cmp(eax, FIRST_NONSTRING_TYPE);
        __ j(above_equal, &miss, not_taken);
        // Check that the maps starting from the prototype haven't changed.
        GenerateLoadGlobalFunctionPrototype(masm(),
                                            Context::STRING_FUNCTION_INDEX,
                                            eax);
        CheckPrototypes(JSObject::cast(object->GetPrototype()), eax, holder,
                        ebx, edx, name, &miss);
      }
1289 1290 1291
      break;

    case NUMBER_CHECK: {
1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309
      if (!function->IsBuiltin()) {
        // Calling non-builtins with a value as receiver requires boxing.
        __ jmp(&miss);
      } else {
        Label fast;
        // Check that the object is a smi or a heap number.
        __ test(edx, Immediate(kSmiTagMask));
        __ j(zero, &fast, taken);
        __ CmpObjectType(edx, HEAP_NUMBER_TYPE, eax);
        __ j(not_equal, &miss, not_taken);
        __ bind(&fast);
        // Check that the maps starting from the prototype haven't changed.
        GenerateLoadGlobalFunctionPrototype(masm(),
                                            Context::NUMBER_FUNCTION_INDEX,
                                            eax);
        CheckPrototypes(JSObject::cast(object->GetPrototype()), eax, holder,
                        ebx, edx, name, &miss);
      }
1310 1311 1312 1313
      break;
    }

    case BOOLEAN_CHECK: {
1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331
      if (!function->IsBuiltin()) {
        // Calling non-builtins with a value as receiver requires boxing.
        __ jmp(&miss);
      } else {
        Label fast;
        // Check that the object is a boolean.
        __ cmp(edx, Factory::true_value());
        __ j(equal, &fast, taken);
        __ cmp(edx, Factory::false_value());
        __ j(not_equal, &miss, not_taken);
        __ bind(&fast);
        // Check that the maps starting from the prototype haven't changed.
        GenerateLoadGlobalFunctionPrototype(masm(),
                                            Context::BOOLEAN_FUNCTION_INDEX,
                                            eax);
        CheckPrototypes(JSObject::cast(object->GetPrototype()), eax, holder,
                        ebx, edx, name, &miss);
      }
1332 1333 1334 1335
      break;
    }

    case JSARRAY_HAS_FAST_ELEMENTS_CHECK:
1336
      CheckPrototypes(JSObject::cast(object), edx, holder,
1337
                      ebx, eax, name, &miss);
1338
      // Make sure object->HasFastElements().
1339 1340 1341 1342
      // Get the elements array of the object.
      __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
      // Check that the object is in fast mode (not dictionary).
      __ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
1343 1344
             Immediate(Factory::fixed_array_map()));
      __ j(not_equal, &miss, not_taken);
1345 1346 1347 1348 1349 1350
      break;

    default:
      UNREACHABLE();
  }

1351 1352 1353
  if (depth != kInvalidProtoDepth) {
    GenerateFastApiCall(masm(), optimization, argc);
  } else {
1354
    __ InvokeFunction(function, arguments(), JUMP_FUNCTION);
1355
  }
1356 1357 1358

  // Handle call cache miss.
  __ bind(&miss);
1359 1360 1361
  if (depth != kInvalidProtoDepth) {
    FreeSpaceForFastApiCall(masm(), eax);
  }
1362
  Handle<Code> ic = ComputeCallMiss(arguments().immediate());
1363
  __ jmp(ic, RelocInfo::CODE_TARGET);
1364 1365

  // Return the generated code.
1366 1367 1368 1369
  String* function_name = NULL;
  if (function->shared()->name()->IsString()) {
    function_name = String::cast(function->shared()->name());
  }
1370
  return GetCode(CONSTANT_FUNCTION, function_name);
1371 1372 1373
}


1374
Object* CallStubCompiler::CompileCallInterceptor(JSObject* object,
1375 1376 1377
                                                 JSObject* holder,
                                                 String* name) {
  // ----------- S t a t e -------------
1378 1379 1380 1381 1382
  //  -- ecx                 : name
  //  -- esp[0]              : return address
  //  -- esp[(argc - n) * 4] : arg[n] (zero-based)
  //  -- ...
  //  -- esp[(argc + 1) * 4] : receiver
1383 1384 1385 1386 1387 1388
  // -----------------------------------
  Label miss;

  // Get the number of arguments.
  const int argc = arguments().immediate();

1389 1390 1391
  LookupResult lookup;
  LookupPostInterceptor(holder, name, &lookup);

1392 1393
  // Get the receiver from the stack.
  __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
1394

1395 1396
  CallInterceptorCompiler compiler(this, arguments(), ecx);
  compiler.Compile(masm(),
1397
                   object,
1398 1399 1400 1401 1402 1403 1404
                   holder,
                   name,
                   &lookup,
                   edx,
                   ebx,
                   edi,
                   &miss);
1405 1406 1407

  // Restore receiver.
  __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
1408 1409

  // Check that the function really is a function.
1410
  __ test(eax, Immediate(kSmiTagMask));
1411
  __ j(zero, &miss, not_taken);
1412
  __ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx);
1413 1414
  __ j(not_equal, &miss, not_taken);

1415 1416
  // Patch the receiver on the stack with the global proxy if
  // necessary.
1417
  if (object->IsGlobalObject()) {
1418 1419
    __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset));
    __ mov(Operand(esp, (argc + 1) * kPointerSize), edx);
1420 1421
  }

1422
  // Invoke the function.
1423
  __ mov(edi, eax);
1424 1425 1426 1427 1428
  __ InvokeFunction(edi, arguments(), JUMP_FUNCTION);

  // Handle load cache miss.
  __ bind(&miss);
  Handle<Code> ic = ComputeCallMiss(argc);
1429
  __ jmp(ic, RelocInfo::CODE_TARGET);
1430 1431

  // Return the generated code.
1432
  return GetCode(INTERCEPTOR, name);
1433 1434 1435
}


1436 1437
Object* CallStubCompiler::CompileCallGlobal(JSObject* object,
                                            GlobalObject* holder,
1438 1439 1440 1441
                                            JSGlobalPropertyCell* cell,
                                            JSFunction* function,
                                            String* name) {
  // ----------- S t a t e -------------
1442 1443 1444 1445 1446
  //  -- ecx                 : name
  //  -- esp[0]              : return address
  //  -- esp[(argc - n) * 4] : arg[n] (zero-based)
  //  -- ...
  //  -- esp[(argc + 1) * 4] : receiver
1447 1448 1449 1450 1451 1452
  // -----------------------------------
  Label miss;

  // Get the number of arguments.
  const int argc = arguments().immediate();

1453
  // Get the receiver from the stack.
1454
  __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
1455 1456 1457 1458 1459 1460 1461 1462 1463 1464

  // If the object is the holder then we know that it's a global
  // object which can only happen for contextual calls. In this case,
  // the receiver cannot be a smi.
  if (object != holder) {
    __ test(edx, Immediate(kSmiTagMask));
    __ j(zero, &miss, not_taken);
  }

  // Check that the maps haven't changed.
1465
  CheckPrototypes(object, edx, holder, ebx, eax, name, &miss);
1466 1467 1468 1469 1470 1471

  // Get the value from the cell.
  __ mov(edi, Immediate(Handle<JSGlobalPropertyCell>(cell)));
  __ mov(edi, FieldOperand(edi, JSGlobalPropertyCell::kValueOffset));

  // Check that the cell contains the same function.
1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490
  if (Heap::InNewSpace(function)) {
    // We can't embed a pointer to a function in new space so we have
    // to verify that the shared function info is unchanged. This has
    // the nice side effect that multiple closures based on the same
    // function can all use this call IC. Before we load through the
    // function, we have to verify that it still is a function.
    __ test(edi, Immediate(kSmiTagMask));
    __ j(zero, &miss, not_taken);
    __ CmpObjectType(edi, JS_FUNCTION_TYPE, ebx);
    __ j(not_equal, &miss, not_taken);

    // Check the shared function info. Make sure it hasn't changed.
    __ cmp(FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset),
           Immediate(Handle<SharedFunctionInfo>(function->shared())));
    __ j(not_equal, &miss, not_taken);
  } else {
    __ cmp(Operand(edi), Immediate(Handle<JSFunction>(function)));
    __ j(not_equal, &miss, not_taken);
  }
1491 1492

  // Patch the receiver on the stack with the global proxy.
1493 1494 1495 1496
  if (object->IsGlobalObject()) {
    __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset));
    __ mov(Operand(esp, (argc + 1) * kPointerSize), edx);
  }
1497 1498 1499 1500 1501

  // Setup the context (function already in edi).
  __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));

  // Jump to the cached code (tail call).
1502
  __ IncrementCounter(&Counters::call_global_inline, 1);
1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519
  ASSERT(function->is_compiled());
  Handle<Code> code(function->code());
  ParameterCount expected(function->shared()->formal_parameter_count());
  __ InvokeCode(code, expected, arguments(),
                RelocInfo::CODE_TARGET, JUMP_FUNCTION);

  // Handle call cache miss.
  __ bind(&miss);
  __ IncrementCounter(&Counters::call_global_inline_miss, 1);
  Handle<Code> ic = ComputeCallMiss(arguments().immediate());
  __ jmp(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(NORMAL, name);
}


1520 1521 1522 1523 1524 1525 1526
Object* StoreStubCompiler::CompileStoreField(JSObject* object,
                                             int index,
                                             Map* transition,
                                             String* name) {
  // ----------- S t a t e -------------
  //  -- eax    : value
  //  -- ecx    : name
1527
  //  -- edx    : receiver
1528 1529 1530 1531 1532
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

  // Generate store field code.  Trashes the name register.
1533 1534 1535 1536
  GenerateStoreField(masm(),
                     object,
                     index,
                     transition,
1537
                     edx, ecx, ebx,
1538
                     &miss);
1539 1540 1541

  // Handle store cache miss.
  __ bind(&miss);
1542
  __ mov(ecx, Immediate(Handle<String>(name)));  // restore name
1543
  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
1544
  __ jmp(ic, RelocInfo::CODE_TARGET);
1545 1546

  // Return the generated code.
1547
  return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name);
1548 1549 1550 1551 1552 1553 1554 1555 1556
}


Object* StoreStubCompiler::CompileStoreCallback(JSObject* object,
                                                AccessorInfo* callback,
                                                String* name) {
  // ----------- S t a t e -------------
  //  -- eax    : value
  //  -- ecx    : name
1557
  //  -- edx    : receiver
1558 1559 1560 1561 1562
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

  // Check that the object isn't a smi.
1563
  __ test(edx, Immediate(kSmiTagMask));
1564 1565 1566
  __ j(zero, &miss, not_taken);

  // Check that the map of the object hasn't changed.
1567
  __ cmp(FieldOperand(edx, HeapObject::kMapOffset),
1568 1569 1570 1571
         Immediate(Handle<Map>(object->map())));
  __ j(not_equal, &miss, not_taken);

  // Perform global security token check if needed.
1572
  if (object->IsJSGlobalProxy()) {
1573
    __ CheckAccessGlobalProxy(edx, ebx, &miss);
1574 1575 1576 1577
  }

  // Stub never generated for non-global objects that require access
  // checks.
1578
  ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
1579 1580

  __ pop(ebx);  // remove the return address
1581
  __ push(edx);  // receiver
1582 1583 1584 1585 1586
  __ push(Immediate(Handle<AccessorInfo>(callback)));  // callback info
  __ push(ecx);  // name
  __ push(eax);  // value
  __ push(ebx);  // restore return address

1587 1588 1589
  // Do tail-call to the runtime system.
  ExternalReference store_callback_property =
      ExternalReference(IC_Utility(IC::kStoreCallbackProperty));
1590
  __ TailCallRuntime(store_callback_property, 4, 1);
1591 1592 1593 1594

  // Handle store cache miss.
  __ bind(&miss);
  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
1595
  __ jmp(ic, RelocInfo::CODE_TARGET);
1596 1597

  // Return the generated code.
1598
  return GetCode(CALLBACKS, name);
1599 1600 1601 1602 1603 1604 1605 1606
}


Object* StoreStubCompiler::CompileStoreInterceptor(JSObject* receiver,
                                                   String* name) {
  // ----------- S t a t e -------------
  //  -- eax    : value
  //  -- ecx    : name
1607
  //  -- edx    : receiver
1608 1609 1610 1611 1612
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

  // Check that the object isn't a smi.
1613
  __ test(edx, Immediate(kSmiTagMask));
1614 1615 1616
  __ j(zero, &miss, not_taken);

  // Check that the map of the object hasn't changed.
1617
  __ cmp(FieldOperand(edx, HeapObject::kMapOffset),
1618 1619 1620 1621
         Immediate(Handle<Map>(receiver->map())));
  __ j(not_equal, &miss, not_taken);

  // Perform global security token check if needed.
1622
  if (receiver->IsJSGlobalProxy()) {
1623
    __ CheckAccessGlobalProxy(edx, ebx, &miss);
1624 1625 1626 1627
  }

  // Stub never generated for non-global objects that require access
  // checks.
1628
  ASSERT(receiver->IsJSGlobalProxy() || !receiver->IsAccessCheckNeeded());
1629 1630

  __ pop(ebx);  // remove the return address
1631
  __ push(edx);  // receiver
1632 1633 1634 1635
  __ push(ecx);  // name
  __ push(eax);  // value
  __ push(ebx);  // restore return address

1636 1637
  // Do tail-call to the runtime system.
  ExternalReference store_ic_property =
1638
      ExternalReference(IC_Utility(IC::kStoreInterceptorProperty));
1639
  __ TailCallRuntime(store_ic_property, 3, 1);
1640 1641 1642 1643

  // Handle store cache miss.
  __ bind(&miss);
  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
1644
  __ jmp(ic, RelocInfo::CODE_TARGET);
1645 1646

  // Return the generated code.
1647
  return GetCode(INTERCEPTOR, name);
1648 1649 1650
}


1651
Object* StoreStubCompiler::CompileStoreGlobal(GlobalObject* object,
1652 1653 1654 1655 1656
                                              JSGlobalPropertyCell* cell,
                                              String* name) {
  // ----------- S t a t e -------------
  //  -- eax    : value
  //  -- ecx    : name
1657
  //  -- edx    : receiver
1658 1659 1660 1661 1662
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

  // Check that the map of the global has not changed.
1663
  __ cmp(FieldOperand(edx, HeapObject::kMapOffset),
1664 1665 1666 1667 1668 1669 1670 1671
         Immediate(Handle<Map>(object->map())));
  __ j(not_equal, &miss, not_taken);

  // Store the value in the cell.
  __ mov(ecx, Immediate(Handle<JSGlobalPropertyCell>(cell)));
  __ mov(FieldOperand(ecx, JSGlobalPropertyCell::kValueOffset), eax);

  // Return the value (register eax).
1672
  __ IncrementCounter(&Counters::named_store_global_inline, 1);
1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
  __ ret(0);

  // Handle store cache miss.
  __ bind(&miss);
  __ IncrementCounter(&Counters::named_store_global_inline_miss, 1);
  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
  __ jmp(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(NORMAL, name);
}


1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706
Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object,
                                                  int index,
                                                  Map* transition,
                                                  String* name) {
  // ----------- S t a t e -------------
  //  -- eax    : value
  //  -- esp[0] : return address
  //  -- esp[4] : key
  //  -- esp[8] : receiver
  // -----------------------------------
  Label miss;

  __ IncrementCounter(&Counters::keyed_store_field, 1);

  // Get the name from the stack.
  __ mov(ecx, Operand(esp, 1 * kPointerSize));
  // Check that the name has not changed.
  __ cmp(Operand(ecx), Immediate(Handle<String>(name)));
  __ j(not_equal, &miss, not_taken);

  // Get the object from the stack.
1707
  __ mov(edx, Operand(esp, 2 * kPointerSize));
1708 1709

  // Generate store field code.  Trashes the name register.
1710 1711 1712 1713
  GenerateStoreField(masm(),
                     object,
                     index,
                     transition,
1714
                     edx, ecx, ebx,
1715
                     &miss);
1716 1717 1718 1719 1720

  // Handle store cache miss.
  __ bind(&miss);
  __ DecrementCounter(&Counters::keyed_store_field, 1);
  Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Miss));
1721
  __ jmp(ic, RelocInfo::CODE_TARGET);
1722 1723

  // Return the generated code.
1724
  return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name);
1725 1726 1727
}


1728

1729 1730
Object* LoadStubCompiler::CompileLoadField(JSObject* object,
                                           JSObject* holder,
1731 1732
                                           int index,
                                           String* name) {
1733
  // ----------- S t a t e -------------
1734
  //  -- eax    : receiver
1735 1736 1737 1738 1739
  //  -- ecx    : name
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

1740
  GenerateLoadField(object, holder, eax, ebx, edx, index, name, &miss);
1741 1742 1743 1744
  __ bind(&miss);
  GenerateLoadMiss(masm(), Code::LOAD_IC);

  // Return the generated code.
1745
  return GetCode(FIELD, name);
1746 1747 1748
}


1749 1750
Object* LoadStubCompiler::CompileLoadCallback(String* name,
                                              JSObject* object,
1751
                                              JSObject* holder,
1752
                                              AccessorInfo* callback) {
1753
  // ----------- S t a t e -------------
1754
  //  -- eax    : receiver
1755 1756 1757 1758 1759
  //  -- ecx    : name
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

1760 1761 1762 1763 1764
  Failure* failure = Failure::InternalError();
  bool success = GenerateLoadCallback(object, holder, eax, ecx, ebx, edx,
                                      callback, name, &miss, &failure);
  if (!success) return failure;

1765 1766 1767 1768
  __ bind(&miss);
  GenerateLoadMiss(masm(), Code::LOAD_IC);

  // Return the generated code.
1769
  return GetCode(CALLBACKS, name);
1770 1771 1772 1773 1774
}


Object* LoadStubCompiler::CompileLoadConstant(JSObject* object,
                                              JSObject* holder,
1775 1776
                                              Object* value,
                                              String* name) {
1777
  // ----------- S t a t e -------------
1778
  //  -- eax    : receiver
1779 1780 1781 1782 1783
  //  -- ecx    : name
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

1784
  GenerateLoadConstant(object, holder, eax, ebx, edx, value, name, &miss);
1785 1786 1787 1788
  __ bind(&miss);
  GenerateLoadMiss(masm(), Code::LOAD_IC);

  // Return the generated code.
1789
  return GetCode(CONSTANT_FUNCTION, name);
1790 1791 1792 1793 1794 1795 1796
}


Object* LoadStubCompiler::CompileLoadInterceptor(JSObject* receiver,
                                                 JSObject* holder,
                                                 String* name) {
  // ----------- S t a t e -------------
1797
  //  -- eax    : receiver
1798 1799 1800 1801 1802
  //  -- ecx    : name
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

1803 1804 1805
  LookupResult lookup;
  LookupPostInterceptor(holder, name, &lookup);

1806 1807
  // TODO(368): Compile in the whole chain: all the interceptors in
  // prototypes and ultimate answer.
1808
  GenerateLoadInterceptor(receiver,
1809
                          holder,
1810
                          &lookup,
1811 1812 1813 1814
                          eax,
                          ecx,
                          edx,
                          ebx,
1815
                          name,
1816 1817
                          &miss);

1818 1819 1820 1821
  __ bind(&miss);
  GenerateLoadMiss(masm(), Code::LOAD_IC);

  // Return the generated code.
1822
  return GetCode(INTERCEPTOR, name);
1823 1824 1825
}


1826 1827
Object* LoadStubCompiler::CompileLoadGlobal(JSObject* object,
                                            GlobalObject* holder,
1828
                                            JSGlobalPropertyCell* cell,
1829 1830
                                            String* name,
                                            bool is_dont_delete) {
1831
  // ----------- S t a t e -------------
1832
  //  -- eax    : receiver
1833 1834 1835 1836 1837
  //  -- ecx    : name
  //  -- esp[0] : return address
  // -----------------------------------
  Label miss;

1838 1839 1840 1841 1842 1843 1844 1845 1846
  // If the object is the holder then we know that it's a global
  // object which can only happen for contextual loads. In this case,
  // the receiver cannot be a smi.
  if (object != holder) {
    __ test(eax, Immediate(kSmiTagMask));
    __ j(zero, &miss, not_taken);
  }

  // Check that the maps haven't changed.
1847
  CheckPrototypes(object, eax, holder, ebx, edx, name, &miss);
1848 1849

  // Get the value from the cell.
1850 1851
  __ mov(ebx, Immediate(Handle<JSGlobalPropertyCell>(cell)));
  __ mov(ebx, FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset));
1852

1853 1854
  // Check for deleted property if property can actually be deleted.
  if (!is_dont_delete) {
1855
    __ cmp(ebx, Factory::the_hole_value());
1856
    __ j(equal, &miss, not_taken);
1857
  } else if (FLAG_debug_code) {
1858
    __ cmp(ebx, Factory::the_hole_value());
1859
    __ Check(not_equal, "DontDelete cells can't contain the hole");
1860
  }
1861

1862
  __ IncrementCounter(&Counters::named_load_global_inline, 1);
1863
  __ mov(eax, ebx);
1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874
  __ ret(0);

  __ bind(&miss);
  __ IncrementCounter(&Counters::named_load_global_inline_miss, 1);
  GenerateLoadMiss(masm(), Code::LOAD_IC);

  // Return the generated code.
  return GetCode(NORMAL, name);
}


1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885
Object* KeyedLoadStubCompiler::CompileLoadField(String* name,
                                                JSObject* receiver,
                                                JSObject* holder,
                                                int index) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------
  Label miss;

1886 1887
  __ mov(eax, Operand(esp, kPointerSize));
  __ mov(ecx, Operand(esp, 2 * kPointerSize));
1888 1889 1890 1891 1892 1893
  __ IncrementCounter(&Counters::keyed_load_field, 1);

  // Check that the name has not changed.
  __ cmp(Operand(eax), Immediate(Handle<String>(name)));
  __ j(not_equal, &miss, not_taken);

1894 1895
  GenerateLoadField(receiver, holder, ecx, ebx, edx, index, name, &miss);

1896 1897 1898 1899 1900
  __ bind(&miss);
  __ DecrementCounter(&Counters::keyed_load_field, 1);
  GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);

  // Return the generated code.
1901
  return GetCode(FIELD, name);
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
}


Object* KeyedLoadStubCompiler::CompileLoadCallback(String* name,
                                                   JSObject* receiver,
                                                   JSObject* holder,
                                                   AccessorInfo* callback) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------
  Label miss;

1916 1917
  __ mov(eax, Operand(esp, kPointerSize));
  __ mov(ecx, Operand(esp, 2 * kPointerSize));
1918 1919 1920 1921 1922 1923
  __ IncrementCounter(&Counters::keyed_load_callback, 1);

  // Check that the name has not changed.
  __ cmp(Operand(eax), Immediate(Handle<String>(name)));
  __ j(not_equal, &miss, not_taken);

1924 1925 1926 1927 1928
  Failure* failure = Failure::InternalError();
  bool success = GenerateLoadCallback(receiver, holder, ecx, eax, ebx, edx,
                                      callback, name, &miss, &failure);
  if (!success) return failure;

1929 1930 1931 1932 1933
  __ bind(&miss);
  __ DecrementCounter(&Counters::keyed_load_callback, 1);
  GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);

  // Return the generated code.
1934
  return GetCode(CALLBACKS, name);
1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948
}


Object* KeyedLoadStubCompiler::CompileLoadConstant(String* name,
                                                   JSObject* receiver,
                                                   JSObject* holder,
                                                   Object* value) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------
  Label miss;

1949 1950
  __ mov(eax, Operand(esp, kPointerSize));
  __ mov(ecx, Operand(esp, 2 * kPointerSize));
1951 1952 1953 1954 1955 1956
  __ IncrementCounter(&Counters::keyed_load_constant_function, 1);

  // Check that the name has not changed.
  __ cmp(Operand(eax), Immediate(Handle<String>(name)));
  __ j(not_equal, &miss, not_taken);

1957 1958
  GenerateLoadConstant(receiver, holder, ecx, ebx, edx,
                       value, name, &miss);
1959 1960 1961 1962 1963
  __ bind(&miss);
  __ DecrementCounter(&Counters::keyed_load_constant_function, 1);
  GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);

  // Return the generated code.
1964
  return GetCode(CONSTANT_FUNCTION, name);
1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977
}


Object* KeyedLoadStubCompiler::CompileLoadInterceptor(JSObject* receiver,
                                                      JSObject* holder,
                                                      String* name) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------
  Label miss;

1978 1979
  __ mov(eax, Operand(esp, kPointerSize));
  __ mov(ecx, Operand(esp, 2 * kPointerSize));
1980 1981 1982 1983 1984 1985
  __ IncrementCounter(&Counters::keyed_load_interceptor, 1);

  // Check that the name has not changed.
  __ cmp(Operand(eax), Immediate(Handle<String>(name)));
  __ j(not_equal, &miss, not_taken);

1986 1987
  LookupResult lookup;
  LookupPostInterceptor(holder, name, &lookup);
1988
  GenerateLoadInterceptor(receiver,
1989
                          holder,
1990
                          &lookup,
1991 1992 1993 1994
                          ecx,
                          eax,
                          edx,
                          ebx,
1995
                          name,
1996
                          &miss);
1997 1998 1999 2000 2001
  __ bind(&miss);
  __ DecrementCounter(&Counters::keyed_load_interceptor, 1);
  GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);

  // Return the generated code.
2002
  return GetCode(INTERCEPTOR, name);
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
}




Object* KeyedLoadStubCompiler::CompileLoadArrayLength(String* name) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------
  Label miss;

2016 2017
  __ mov(eax, Operand(esp, kPointerSize));
  __ mov(ecx, Operand(esp, 2 * kPointerSize));
2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029
  __ IncrementCounter(&Counters::keyed_load_array_length, 1);

  // Check that the name has not changed.
  __ cmp(Operand(eax), Immediate(Handle<String>(name)));
  __ j(not_equal, &miss, not_taken);

  GenerateLoadArrayLength(masm(), ecx, edx, &miss);
  __ bind(&miss);
  __ DecrementCounter(&Counters::keyed_load_array_length, 1);
  GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);

  // Return the generated code.
2030
  return GetCode(CALLBACKS, name);
2031 2032 2033
}


2034
Object* KeyedLoadStubCompiler::CompileLoadStringLength(String* name) {
2035 2036 2037 2038 2039 2040 2041
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------
  Label miss;

2042 2043
  __ mov(eax, Operand(esp, kPointerSize));
  __ mov(ecx, Operand(esp, 2 * kPointerSize));
2044 2045 2046 2047 2048 2049
  __ IncrementCounter(&Counters::keyed_load_string_length, 1);

  // Check that the name has not changed.
  __ cmp(Operand(eax), Immediate(Handle<String>(name)));
  __ j(not_equal, &miss, not_taken);

2050
  GenerateLoadStringLength(masm(), ecx, edx, ebx, &miss);
2051 2052 2053 2054 2055
  __ bind(&miss);
  __ DecrementCounter(&Counters::keyed_load_string_length, 1);
  GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);

  // Return the generated code.
2056
  return GetCode(CALLBACKS, name);
2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067
}


Object* KeyedLoadStubCompiler::CompileLoadFunctionPrototype(String* name) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------
  Label miss;

2068 2069
  __ mov(eax, Operand(esp, kPointerSize));
  __ mov(ecx, Operand(esp, 2 * kPointerSize));
2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
  __ IncrementCounter(&Counters::keyed_load_function_prototype, 1);

  // Check that the name has not changed.
  __ cmp(Operand(eax), Immediate(Handle<String>(name)));
  __ j(not_equal, &miss, not_taken);

  GenerateLoadFunctionPrototype(masm(), ecx, edx, ebx, &miss);
  __ bind(&miss);
  __ DecrementCounter(&Counters::keyed_load_function_prototype, 1);
  GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);

  // Return the generated code.
2082
  return GetCode(CALLBACKS, name);
2083 2084 2085
}


2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128
// Specialized stub for constructing objects from functions which only have only
// simple assignments of the form this.x = ...; in their body.
Object* ConstructStubCompiler::CompileConstructStub(
    SharedFunctionInfo* shared) {
  // ----------- S t a t e -------------
  //  -- eax : argc
  //  -- edi : constructor
  //  -- esp[0] : return address
  //  -- esp[4] : last argument
  // -----------------------------------
  Label generic_stub_call;
#ifdef ENABLE_DEBUGGER_SUPPORT
  // Check to see whether there are any break points in the function code. If
  // there are jump to the generic constructor stub which calls the actual
  // code for the function thereby hitting the break points.
  __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
  __ mov(ebx, FieldOperand(ebx, SharedFunctionInfo::kDebugInfoOffset));
  __ cmp(ebx, Factory::undefined_value());
  __ j(not_equal, &generic_stub_call, not_taken);
#endif

  // Load the initial map and verify that it is in fact a map.
  __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
  // Will both indicate a NULL and a Smi.
  __ test(ebx, Immediate(kSmiTagMask));
  __ j(zero, &generic_stub_call);
  __ CmpObjectType(ebx, MAP_TYPE, ecx);
  __ j(not_equal, &generic_stub_call);

#ifdef DEBUG
  // Cannot construct functions this way.
  // edi: constructor
  // ebx: initial map
  __ CmpInstanceType(ebx, JS_FUNCTION_TYPE);
  __ Assert(not_equal, "Function constructed by construct stub.");
#endif

  // Now allocate the JSObject on the heap by moving the new space allocation
  // top forward.
  // edi: constructor
  // ebx: initial map
  __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
  __ shl(ecx, kPointerSizeLog2);
2129 2130 2131 2132 2133 2134
  __ AllocateInNewSpace(ecx,
                        edx,
                        ecx,
                        no_reg,
                        &generic_stub_call,
                        NO_ALLOCATION_FLAGS);
2135 2136 2137

  // Allocated the JSObject, now initialize the fields and add the heap tag.
  // ebx: initial map
2138
  // edx: JSObject (untagged)
2139 2140 2141 2142 2143 2144
  __ mov(Operand(edx, JSObject::kMapOffset), ebx);
  __ mov(ebx, Factory::empty_fixed_array());
  __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx);
  __ mov(Operand(edx, JSObject::kElementsOffset), ebx);

  // Push the allocated object to the stack. This is the object that will be
2145
  // returned (after it is tagged).
2146 2147 2148
  __ push(edx);

  // eax: argc
2149
  // edx: JSObject (untagged)
2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167
  // Load the address of the first in-object property into edx.
  __ lea(edx, Operand(edx, JSObject::kHeaderSize));
  // Calculate the location of the first argument. The stack contains the
  // allocated object and the return address on top of the argc arguments.
  __ lea(ecx, Operand(esp, eax, times_4, 1 * kPointerSize));

  // Use edi for holding undefined which is used in several places below.
  __ mov(edi, Factory::undefined_value());

  // eax: argc
  // ecx: first argument
  // edx: first in-object property of the JSObject
  // edi: undefined
  // Fill the initialized properties with a constant value or a passed argument
  // depending on the this.x = ...; assignment in the function.
  for (int i = 0; i < shared->this_property_assignments_count(); i++) {
    if (shared->IsThisPropertyAssignmentArgument(i)) {
      // Check if the argument assigned to the property is actually passed.
2168 2169
      // If argument is not passed the property is set to undefined,
      // otherwise find it on the stack.
2170
      int arg_number = shared->GetThisPropertyAssignmentArgument(i);
2171
      __ mov(ebx, edi);
2172
      __ cmp(eax, arg_number);
2173 2174 2175 2176 2177 2178 2179 2180 2181 2182
      if (CpuFeatures::IsSupported(CMOV)) {
        CpuFeatures::Scope use_cmov(CMOV);
        __ cmov(above, ebx, Operand(ecx, arg_number * -kPointerSize));
      } else {
        Label not_passed;
        __ j(below_equal, &not_passed);
        __ mov(ebx, Operand(ecx, arg_number * -kPointerSize));
        __ bind(&not_passed);
      }
      // Store value in the property.
2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197
      __ mov(Operand(edx, i * kPointerSize), ebx);
    } else {
      // Set the property to the constant value.
      Handle<Object> constant(shared->GetThisPropertyAssignmentConstant(i));
      __ mov(Operand(edx, i * kPointerSize), Immediate(constant));
    }
  }

  // Fill the unused in-object property fields with undefined.
  for (int i = shared->this_property_assignments_count();
       i < shared->CalculateInObjectProperties();
       i++) {
    __ mov(Operand(edx, i * kPointerSize), edi);
  }

2198
  // Move argc to ebx and retrieve and tag the JSObject to return.
2199 2200
  __ mov(ebx, eax);
  __ pop(eax);
2201
  __ or_(Operand(eax), Immediate(kHeapObjectTag));
2202

2203
  // Remove caller arguments and receiver from the stack and return.
2204
  __ pop(ecx);
2205
  __ lea(esp, Operand(esp, ebx, times_pointer_size, 1 * kPointerSize));
2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222
  __ push(ecx);
  __ IncrementCounter(&Counters::constructed_objects, 1);
  __ IncrementCounter(&Counters::constructed_objects_stub, 1);
  __ ret(0);

  // Jump to the generic stub in case the specialized code cannot handle the
  // construction.
  __ bind(&generic_stub_call);
  Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric);
  Handle<Code> generic_construct_stub(code);
  __ jmp(generic_construct_stub, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode();
}


2223 2224 2225
#undef __

} }  // namespace v8::internal