Reverting r4685, r4686, r4687

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
===================================================================
--- src/x64/full-codegen-x64.cc	(revision 4686)
+++ src/x64/full-codegen-x64.cc	(working copy)
@@ -81,17 +81,11 @@
     bool function_in_register = true;
 
     // Possibly allocate a local context.
-    int heap_slots = scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS;
-    if (heap_slots > 0) {
+    if (scope()->num_heap_slots() > 0) {
       Comment cmnt(masm_, "[ Allocate local context");
       // Argument to NewContext is the function, which is still in rdi.
       __ push(rdi);
-      if (heap_slots <= FastNewContextStub::kMaximumSlots) {
-        FastNewContextStub stub(heap_slots);
-        __ CallStub(&stub);
-      } else {
-        __ CallRuntime(Runtime::kNewContext, 1);
-      }
+      __ CallRuntime(Runtime::kNewContext, 1);
       function_in_register = false;
       // Context is returned in both rax and rsi.  It replaces the context
       // passed to us.  It's saved in the stack and kept live in rsi.
@@ -151,18 +145,7 @@
   }
 
   { Comment cmnt(masm_, "[ Declarations");
-    // For named function expressions, declare the function name as a
-    // constant.
-    if (scope()->is_function_scope() && scope()->function() != NULL) {
-      EmitDeclaration(scope()->function(), Variable::CONST, NULL);
-    }
-    // Visit all the explicit declarations unless there is an illegal
-    // redeclaration.
-    if (scope()->HasIllegalRedeclaration()) {
-      scope()->VisitIllegalRedeclaration(this);
-    } else {
-      VisitDeclarations(scope()->declarations());
-    }
+    VisitDeclarations(scope()->declarations());
   }
 
   { Comment cmnt(masm_, "[ Stack check");
@@ -446,39 +429,6 @@
 }
 
 
-void FullCodeGenerator::PrepareTest(Label* materialize_true,
-                                    Label* materialize_false,
-                                    Label** if_true,
-                                    Label** if_false) {
-  switch (context_) {
-    case Expression::kUninitialized:
-      UNREACHABLE();
-      break;
-    case Expression::kEffect:
-      // In an effect context, the true and the false case branch to the
-      // same label.
-      *if_true = *if_false = materialize_true;
-      break;
-    case Expression::kValue:
-      *if_true = materialize_true;
-      *if_false = materialize_false;
-      break;
-    case Expression::kTest:
-      *if_true = true_label_;
-      *if_false = false_label_;
-      break;
-    case Expression::kValueTest:
-      *if_true = materialize_true;
-      *if_false = false_label_;
-      break;
-    case Expression::kTestValue:
-      *if_true = true_label_;
-      *if_false = materialize_false;
-      break;
-  }
-}
-
-
 void FullCodeGenerator::Apply(Expression::Context context,
                               Label* materialize_true,
                               Label* materialize_false) {
@@ -544,61 +494,6 @@
 }
 
 
-// Convert constant control flow (true or false) to the result expected for
-// a given expression context.
-void FullCodeGenerator::Apply(Expression::Context context, bool flag) {
-  switch (context) {
-    case Expression::kUninitialized:
-      UNREACHABLE();
-      break;
-    case Expression::kEffect:
-      break;
-    case Expression::kValue: {
-      Heap::RootListIndex value_root_index =
-          flag ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex;
-      switch (location_) {
-        case kAccumulator:
-          __ LoadRoot(result_register(), value_root_index);
-          break;
-        case kStack:
-          __ PushRoot(value_root_index);
-          break;
-      }
-      break;
-    }
-    case Expression::kTest:
-      __ jmp(flag ? true_label_ : false_label_);
-      break;
-    case Expression::kTestValue:
-      switch (location_) {
-        case kAccumulator:
-          // If value is false it's needed.
-          if (!flag) __ LoadRoot(result_register(), Heap::kFalseValueRootIndex);
-          break;
-        case kStack:
-          // If value is false it's needed.
-          if (!flag) __ PushRoot(Heap::kFalseValueRootIndex);
-          break;
-      }
-      __ jmp(flag ? true_label_ : false_label_);
-      break;
-    case Expression::kValueTest:
-      switch (location_) {
-        case kAccumulator:
-          // If value is true it's needed.
-          if (flag) __ LoadRoot(result_register(), Heap::kTrueValueRootIndex);
-          break;
-        case kStack:
-          // If value is true it's needed.
-          if (flag) __ PushRoot(Heap::kTrueValueRootIndex);
-          break;
-      }
-      __ jmp(flag ? true_label_ : false_label_);
-      break;
-  }
-}
-
-
 void FullCodeGenerator::DoTest(Expression::Context context) {
   // The value to test is in the accumulator.  If the value might be needed
   // on the stack (value/test and test/value contexts with a stack location
@@ -774,23 +669,22 @@
 }
 
 
-void FullCodeGenerator::EmitDeclaration(Variable* variable,
-                                        Variable::Mode mode,
-                                        FunctionLiteral* function) {
+void FullCodeGenerator::VisitDeclaration(Declaration* decl) {
   Comment cmnt(masm_, "[ Declaration");
-  ASSERT(variable != NULL);  // Must have been resolved.
-  Slot* slot = variable->slot();
-  Property* prop = variable->AsProperty();
+  Variable* var = decl->proxy()->var();
+  ASSERT(var != NULL);  // Must have been resolved.
+  Slot* slot = var->slot();
+  Property* prop = var->AsProperty();
 
   if (slot != NULL) {
     switch (slot->type()) {
       case Slot::PARAMETER:
       case Slot::LOCAL:
-        if (mode == Variable::CONST) {
+        if (decl->mode() == Variable::CONST) {
           __ LoadRoot(kScratchRegister, Heap::kTheHoleValueRootIndex);
           __ movq(Operand(rbp, SlotOffset(slot)), kScratchRegister);
-        } else if (function != NULL) {
-          VisitForValue(function, kAccumulator);
+        } else if (decl->fun() != NULL) {
+          VisitForValue(decl->fun(), kAccumulator);
           __ movq(Operand(rbp, SlotOffset(slot)), result_register());
         }
         break;
@@ -800,7 +694,7 @@
         // this specific context.
 
         // The variable in the decl always resides in the current context.
-        ASSERT_EQ(0, scope()->ContextChainLength(variable->scope()));
+        ASSERT_EQ(0, scope()->ContextChainLength(var->scope()));
         if (FLAG_debug_code) {
           // Check if we have the correct context pointer.
           __ movq(rbx,
@@ -808,13 +702,13 @@
           __ cmpq(rbx, rsi);
           __ Check(equal, "Unexpected declaration in current context.");
         }
-        if (mode == Variable::CONST) {
+        if (decl->mode() == Variable::CONST) {
           __ LoadRoot(kScratchRegister, Heap::kTheHoleValueRootIndex);
           __ movq(CodeGenerator::ContextOperand(rsi, slot->index()),
                   kScratchRegister);
           // No write barrier since the hole value is in old space.
-        } else if (function != NULL) {
-          VisitForValue(function, kAccumulator);
+        } else if (decl->fun() != NULL) {
+          VisitForValue(decl->fun(), kAccumulator);
           __ movq(CodeGenerator::ContextOperand(rsi, slot->index()),
                   result_register());
           int offset = Context::SlotOffset(slot->index());
@@ -825,19 +719,21 @@
 
       case Slot::LOOKUP: {
         __ push(rsi);
-        __ Push(variable->name());
+        __ Push(var->name());
         // Declaration nodes are always introduced in one of two modes.
-        ASSERT(mode == Variable::VAR || mode == Variable::CONST);
-        PropertyAttributes attr = (mode == Variable::VAR) ? NONE : READ_ONLY;
+        ASSERT(decl->mode() == Variable::VAR ||
+               decl->mode() == Variable::CONST);
+        PropertyAttributes attr =
+            (decl->mode() == Variable::VAR) ? NONE : READ_ONLY;
         __ Push(Smi::FromInt(attr));
         // Push initial value, if any.
         // Note: For variables we must not push an initial value (such as
         // 'undefined') because we may have a (legal) redeclaration and we
         // must not destroy the current value.
-        if (mode == Variable::CONST) {
+        if (decl->mode() == Variable::CONST) {
           __ PushRoot(Heap::kTheHoleValueRootIndex);
-        } else if (function != NULL) {
-          VisitForValue(function, kStack);
+        } else if (decl->fun() != NULL) {
+          VisitForValue(decl->fun(), kStack);
         } else {
           __ Push(Smi::FromInt(0));  // no initial value!
         }
@@ -847,14 +743,14 @@
     }
 
   } else if (prop != NULL) {
-    if (function != NULL || mode == Variable::CONST) {
+    if (decl->fun() != NULL || decl->mode() == Variable::CONST) {
       // We are declaring a function or constant that rewrites to a
       // property.  Use (keyed) IC to set the initial value.
       VisitForValue(prop->obj(), kStack);
       VisitForValue(prop->key(), kStack);
 
-      if (function != NULL) {
-        VisitForValue(function, kAccumulator);
+      if (decl->fun() != NULL) {
+        VisitForValue(decl->fun(), kAccumulator);
       } else {
         __ LoadRoot(result_register(), Heap::kTheHoleValueRootIndex);
       }
@@ -873,11 +769,6 @@
 }
 
 
-void FullCodeGenerator::VisitDeclaration(Declaration* decl) {
-  EmitDeclaration(decl->proxy()->var(), decl->mode(), decl->fun());
-}
-
-
 void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
   // Call the runtime to declare the globals.
   __ push(rsi);  // The context is the first argument.
@@ -889,208 +780,12 @@
 
 
 void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
-  Comment cmnt(masm_, "[ SwitchStatement");
-  Breakable nested_statement(this, stmt);
-  SetStatementPosition(stmt);
-  // Keep the switch value on the stack until a case matches.
-  VisitForValue(stmt->tag(), kStack);
-
-  ZoneList<CaseClause*>* clauses = stmt->cases();
-  CaseClause* default_clause = NULL;  // Can occur anywhere in the list.
-
-  Label next_test;  // Recycled for each test.
-  // Compile all the tests with branches to their bodies.
-  for (int i = 0; i < clauses->length(); i++) {
-    CaseClause* clause = clauses->at(i);
-    // The default is not a test, but remember it as final fall through.
-    if (clause->is_default()) {
-      default_clause = clause;
-      continue;
-    }
-
-    Comment cmnt(masm_, "[ Case comparison");
-    __ bind(&next_test);
-    next_test.Unuse();
-
-    // Compile the label expression.
-    VisitForValue(clause->label(), kAccumulator);
-
-    // Perform the comparison as if via '==='.  The comparison stub expects
-    // the smi vs. smi case to be handled before it is called.
-    Label slow_case;
-    __ movq(rdx, Operand(rsp, 0));  // Switch value.
-    __ JumpIfNotBothSmi(rdx, rax, &slow_case);
-    __ SmiCompare(rdx, rax);
-    __ j(not_equal, &next_test);
-    __ Drop(1);  // Switch value is no longer needed.
-    __ jmp(clause->body_target()->entry_label());
-
-    __ bind(&slow_case);
-    CompareStub stub(equal, true);
-    __ CallStub(&stub);
-    __ testq(rax, rax);
-    __ j(not_equal, &next_test);
-    __ Drop(1);  // Switch value is no longer needed.
-    __ jmp(clause->body_target()->entry_label());
-  }
-
-  // Discard the test value and jump to the default if present, otherwise to
-  // the end of the statement.
-  __ bind(&next_test);
-  __ Drop(1);  // Switch value is no longer needed.
-  if (default_clause == NULL) {
-    __ jmp(nested_statement.break_target());
-  } else {
-    __ jmp(default_clause->body_target()->entry_label());
-  }
-
-  // Compile all the case bodies.
-  for (int i = 0; i < clauses->length(); i++) {
-    Comment cmnt(masm_, "[ Case body");
-    CaseClause* clause = clauses->at(i);
-    __ bind(clause->body_target()->entry_label());
-    VisitStatements(clause->statements());
-  }
-
-  __ bind(nested_statement.break_target());
+  UNREACHABLE();
 }
 
 
 void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
-  Comment cmnt(masm_, "[ ForInStatement");
-  SetStatementPosition(stmt);
-
-  Label loop, exit;
-  ForIn loop_statement(this, stmt);
-  increment_loop_depth();
-
-  // Get the object to enumerate over. Both SpiderMonkey and JSC
-  // ignore null and undefined in contrast to the specification; see
-  // ECMA-262 section 12.6.4.
-  VisitForValue(stmt->enumerable(), kAccumulator);
-  __ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
-  __ j(equal, &exit);
-  __ CompareRoot(rax, Heap::kNullValueRootIndex);
-  __ j(equal, &exit);
-
-  // Convert the object to a JS object.
-  Label convert, done_convert;
-  __ JumpIfSmi(rax, &convert);
-  __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rcx);
-  __ j(above_equal, &done_convert);
-  __ bind(&convert);
-  __ push(rax);
-  __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
-  __ bind(&done_convert);
-  __ push(rax);
-
-  // TODO(kasperl): Check cache validity in generated code. This is a
-  // fast case for the JSObject::IsSimpleEnum cache validity
-  // checks. If we cannot guarantee cache validity, call the runtime
-  // system to check cache validity or get the property names in a
-  // fixed array.
-
-  // Get the set of properties to enumerate.
-  __ push(rax);  // Duplicate the enumerable object on the stack.
-  __ CallRuntime(Runtime::kGetPropertyNamesFast, 1);
-
-  // If we got a map from the runtime call, we can do a fast
-  // modification check. Otherwise, we got a fixed array, and we have
-  // to do a slow check.
-  Label fixed_array;
-  __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset),
-                 Heap::kMetaMapRootIndex);
-  __ j(not_equal, &fixed_array);
-
-  // We got a map in register rax. Get the enumeration cache from it.
-  __ movq(rcx, FieldOperand(rax, Map::kInstanceDescriptorsOffset));
-  __ movq(rcx, FieldOperand(rcx, DescriptorArray::kEnumerationIndexOffset));
-  __ movq(rdx, FieldOperand(rcx, DescriptorArray::kEnumCacheBridgeCacheOffset));
-
-  // Setup the four remaining stack slots.
-  __ push(rax);  // Map.
-  __ push(rdx);  // Enumeration cache.
-  __ movq(rax, FieldOperand(rdx, FixedArray::kLengthOffset));
-  __ push(rax);  // Enumeration cache length (as smi).
-  __ Push(Smi::FromInt(0));  // Initial index.
-  __ jmp(&loop);
-
-  // We got a fixed array in register rax. Iterate through that.
-  __ bind(&fixed_array);
-  __ Push(Smi::FromInt(0));  // Map (0) - force slow check.
-  __ push(rax);
-  __ movq(rax, FieldOperand(rax, FixedArray::kLengthOffset));
-  __ push(rax);  // Fixed array length (as smi).
-  __ Push(Smi::FromInt(0));  // Initial index.
-
-  // Generate code for doing the condition check.
-  __ bind(&loop);
-  __ movq(rax, Operand(rsp, 0 * kPointerSize));  // Get the current index.
-  __ cmpq(rax, Operand(rsp, 1 * kPointerSize));  // Compare to the array length.
-  __ j(above_equal, loop_statement.break_target());
-
-  // Get the current entry of the array into register rbx.
-  __ movq(rbx, Operand(rsp, 2 * kPointerSize));
-  SmiIndex index = __ SmiToIndex(rax, rax, kPointerSizeLog2);
-  __ movq(rbx, FieldOperand(rbx,
-                            index.reg,
-                            index.scale,
-                            FixedArray::kHeaderSize));
-
-  // Get the expected map from the stack or a zero map in the
-  // permanent slow case into register rdx.
-  __ movq(rdx, Operand(rsp, 3 * kPointerSize));
-
-  // Check if the expected map still matches that of the enumerable.
-  // If not, we have to filter the key.
-  Label update_each;
-  __ movq(rcx, Operand(rsp, 4 * kPointerSize));
-  __ cmpq(rdx, FieldOperand(rcx, HeapObject::kMapOffset));
-  __ j(equal, &update_each);
-
-  // Convert the entry to a string or null if it isn't a property
-  // anymore. If the property has been removed while iterating, we
-  // just skip it.
-  __ push(rcx);  // Enumerable.
-  __ push(rbx);  // Current entry.
-  __ InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION);
-  __ CompareRoot(rax, Heap::kNullValueRootIndex);
-  __ j(equal, loop_statement.continue_target());
-  __ movq(rbx, rax);
-
-  // Update the 'each' property or variable from the possibly filtered
-  // entry in register rbx.
-  __ bind(&update_each);
-  __ movq(result_register(), rbx);
-  // Perform the assignment as if via '='.
-  EmitAssignment(stmt->each());
-
-  // Generate code for the body of the loop.
-  Label stack_limit_hit, stack_check_done;
-  Visit(stmt->body());
-
-  __ StackLimitCheck(&stack_limit_hit);
-  __ bind(&stack_check_done);
-
-  // Generate code for going to the next element by incrementing the
-  // index (smi) stored on top of the stack.
-  __ bind(loop_statement.continue_target());
-  __ SmiAddConstant(Operand(rsp, 0 * kPointerSize), Smi::FromInt(1));
-  __ jmp(&loop);
-
-  // Slow case for the stack limit check.
-  StackCheckStub stack_check_stub;
-  __ bind(&stack_limit_hit);
-  __ CallStub(&stack_check_stub);
-  __ jmp(&stack_check_done);
-
-  // Remove the pointers stored on the stack.
-  __ bind(loop_statement.break_target());
-  __ addq(rsp, Immediate(5 * kPointerSize));
-
-  // Exit and decrement the loop depth.
-  __ bind(&exit);
-  decrement_loop_depth();
+  UNREACHABLE();
 }
 
 
@@ -1149,20 +844,7 @@
     Comment cmnt(masm_, (slot->type() == Slot::CONTEXT)
                             ? "Context slot"
                             : "Stack slot");
-    if (var->mode() == Variable::CONST) {
-      // Constants may be the hole value if they have not been initialized.
-      // Unhole them.
-      Label done;
-      MemOperand slot_operand = EmitSlotSearch(slot, rax);
-      __ movq(rax, slot_operand);
-      __ CompareRoot(rax, Heap::kTheHoleValueRootIndex);
-      __ j(not_equal, &done);
-      __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-      __ bind(&done);
-      Apply(context, rax);
-    } else {
-      Apply(context, slot);
-    }
+    Apply(context, slot);
 
   } else {
     Comment cmnt(masm_, "Rewritten parameter");
@@ -1298,28 +980,22 @@
 
 void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   Comment cmnt(masm_, "[ ArrayLiteral");
-
-  ZoneList<Expression*>* subexprs = expr->values();
-  int length = subexprs->length();
-
   __ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
   __ push(FieldOperand(rbx, JSFunction::kLiteralsOffset));
   __ Push(Smi::FromInt(expr->literal_index()));
   __ Push(expr->constant_elements());
   if (expr->depth() > 1) {
     __ CallRuntime(Runtime::kCreateArrayLiteral, 3);
-  } else if (length > FastCloneShallowArrayStub::kMaximumLength) {
-    __ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3);
   } else {
-    FastCloneShallowArrayStub stub(length);
-    __ CallStub(&stub);
+    __ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3);
   }
 
   bool result_saved = false;  // Is the result saved to the stack?
 
   // Emit code to evaluate all the non-constant subexpressions and to store
   // them into the newly cloned array.
-  for (int i = 0; i < length; i++) {
+  ZoneList<Expression*>* subexprs = expr->values();
+  for (int i = 0, len = subexprs->length(); i < len; i++) {
     Expression* subexpr = subexprs->at(i);
     // If the subexpression is a literal or a simple materialized literal it
     // is already set in the cloned array.
@@ -1481,57 +1157,6 @@
 }
 
 
-void FullCodeGenerator::EmitAssignment(Expression* expr) {
-  // Invalid left-hand sides are rewritten to have a 'throw
-  // ReferenceError' on the left-hand side.
-  if (!expr->IsValidLeftHandSide()) {
-    VisitForEffect(expr);
-    return;
-  }
-
-  // Left-hand side can only be a property, a global or a (parameter or local)
-  // slot. Variables with rewrite to .arguments are treated as KEYED_PROPERTY.
-  enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY };
-  LhsKind assign_type = VARIABLE;
-  Property* prop = expr->AsProperty();
-  if (prop != NULL) {
-    assign_type = (prop->key()->IsPropertyName())
-        ? NAMED_PROPERTY
-        : KEYED_PROPERTY;
-  }
-
-  switch (assign_type) {
-    case VARIABLE: {
-      Variable* var = expr->AsVariableProxy()->var();
-      EmitVariableAssignment(var, Token::ASSIGN, Expression::kEffect);
-      break;
-    }
-    case NAMED_PROPERTY: {
-      __ push(rax);  // Preserve value.
-      VisitForValue(prop->obj(), kAccumulator);
-      __ movq(rdx, rax);
-      __ pop(rax);  // Restore value.
-      __ Move(rcx, prop->key()->AsLiteral()->handle());
-      Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
-      __ call(ic, RelocInfo::CODE_TARGET);
-      __ nop();  // Signal no inlined code.
-      break;
-    }
-    case KEYED_PROPERTY: {
-      __ push(rax);  // Preserve value.
-      VisitForValue(prop->obj(), kStack);
-      VisitForValue(prop->key(), kStack);
-      __ movq(rax, Operand(rsp, 2 * kPointerSize));
-      Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
-      __ call(ic, RelocInfo::CODE_TARGET);
-      __ nop();  // Signal no inlined code.
-      __ Drop(3);  // Receiver, key, and extra copy of value.
-      break;
-    }
-  }
-}
-
-
 void FullCodeGenerator::EmitVariableAssignment(Variable* var,
                                                Token::Value op,
                                                Expression::Context context) {
@@ -1562,7 +1187,7 @@
         if (op == Token::INIT_CONST) {
           // Detect const reinitialization by checking for the hole value.
           __ movq(rdx, Operand(rbp, SlotOffset(slot)));
-          __ CompareRoot(rdx, Heap::kTheHoleValueRootIndex);
+          __ Cmp(rdx, Factory::the_hole_value());
           __ j(not_equal, &done);
         }
         // Perform the assignment.
@@ -1574,7 +1199,7 @@
         if (op == Token::INIT_CONST) {
           // Detect const reinitialization by checking for the hole value.
           __ movq(rdx, target);
-          __ CompareRoot(rdx, Heap::kTheHoleValueRootIndex);
+          __ Cmp(rdx, Factory::the_hole_value());
           __ j(not_equal, &done);
         }
         // Perform the assignment and issue the write barrier.
@@ -1737,8 +1362,7 @@
   }
   // Record source position for debugger.
   SetSourcePosition(expr->position());
-  InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP;
-  CallFunctionStub stub(arg_count, in_loop, RECEIVER_MIGHT_BE_VALUE);
+  CallFunctionStub stub(arg_count, NOT_IN_LOOP, RECEIVER_MIGHT_BE_VALUE);
   __ CallStub(&stub);
   // Restore context register.
   __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
@@ -1753,47 +1377,8 @@
   Variable* var = fun->AsVariableProxy()->AsVariable();
 
   if (var != NULL && var->is_possibly_eval()) {
-    // In a call to eval, we first call %ResolvePossiblyDirectEval to
-    // resolve the function we need to call and the receiver of the
-    // call.  The we call the resolved function using the given
-    // arguments.
-    VisitForValue(fun, kStack);
-    __ PushRoot(Heap::kUndefinedValueRootIndex);  // Reserved receiver slot.
-
-    // Push the arguments.
-    ZoneList<Expression*>* args = expr->arguments();
-    int arg_count = args->length();
-    for (int i = 0; i < arg_count; i++) {
-      VisitForValue(args->at(i), kStack);
-    }
-
-    // Push copy of the function - found below the arguments.
-    __ push(Operand(rsp, (arg_count + 1) * kPointerSize));
-
-    // Push copy of the first argument or undefined if it doesn't exist.
-    if (arg_count > 0) {
-      __ push(Operand(rsp, arg_count * kPointerSize));
-    } else {
-      __ PushRoot(Heap::kUndefinedValueRootIndex);
-    }
-
-    // Push the receiver of the enclosing function and do runtime call.
-    __ push(Operand(rbp, (2 + scope()->num_parameters()) * kPointerSize));
-    __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 3);
-
-    // The runtime call returns a pair of values in rax (function) and
-    // rdx (receiver). Touch up the stack with the right values.
-    __ movq(Operand(rsp, (arg_count + 0) * kPointerSize), rdx);
-    __ movq(Operand(rsp, (arg_count + 1) * kPointerSize), rax);
-
-    // Record source position for debugger.
-    SetSourcePosition(expr->position());
-    InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP;
-    CallFunctionStub stub(arg_count, in_loop, RECEIVER_MIGHT_BE_VALUE);
-    __ CallStub(&stub);
-    // Restore context register.
-    __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
-    DropAndApply(1, context_, rax);
+    // Call to the identifier 'eval'.
+    UNREACHABLE();
   } else if (var != NULL && !var->is_this() && var->is_global()) {
     // Call to a global variable.
     // Push global object as receiver for the call IC lookup.
@@ -1801,15 +1386,8 @@
     EmitCallWithIC(expr, var->name(), RelocInfo::CODE_TARGET_CONTEXT);
   } else if (var != NULL && var->slot() != NULL &&
              var->slot()->type() == Slot::LOOKUP) {
-    // Call to a lookup slot (dynamically introduced variable).  Call
-    // the runtime to find the function to call (returned in rax) and
-    // the object holding it (returned in rdx).
-    __ push(context_register());
-    __ Push(var->name());
-    __ CallRuntime(Runtime::kLoadContextSlot, 2);
-    __ push(rax);  // Function.
-    __ push(rdx);  // Receiver.
-    EmitCallWithStub(expr);
+    // Call to a lookup slot.
+    UNREACHABLE();
   } else if (fun->AsProperty() != NULL) {
     // Call to an object property.
     Property* prop = fun->AsProperty();
@@ -1900,711 +1478,7 @@
 }
 
 
-void FullCodeGenerator::EmitInlineRuntimeCall(CallRuntime* expr) {
-  Handle<String> name = expr->name();
-  if (strcmp("_IsSmi", *name->ToCString()) == 0) {
-    EmitIsSmi(expr->arguments());
-  } else if (strcmp("_IsNonNegativeSmi", *name->ToCString()) == 0) {
-    EmitIsNonNegativeSmi(expr->arguments());
-  } else if (strcmp("_IsObject", *name->ToCString()) == 0) {
-    EmitIsObject(expr->arguments());
-  } else if (strcmp("_IsUndetectableObject", *name->ToCString()) == 0) {
-    EmitIsUndetectableObject(expr->arguments());
-  } else if (strcmp("_IsFunction", *name->ToCString()) == 0) {
-    EmitIsFunction(expr->arguments());
-  } else if (strcmp("_IsArray", *name->ToCString()) == 0) {
-    EmitIsArray(expr->arguments());
-  } else if (strcmp("_IsRegExp", *name->ToCString()) == 0) {
-    EmitIsRegExp(expr->arguments());
-  } else if (strcmp("_IsConstructCall", *name->ToCString()) == 0) {
-    EmitIsConstructCall(expr->arguments());
-  } else if (strcmp("_ObjectEquals", *name->ToCString()) == 0) {
-    EmitObjectEquals(expr->arguments());
-  } else if (strcmp("_Arguments", *name->ToCString()) == 0) {
-    EmitArguments(expr->arguments());
-  } else if (strcmp("_ArgumentsLength", *name->ToCString()) == 0) {
-    EmitArgumentsLength(expr->arguments());
-  } else if (strcmp("_ClassOf", *name->ToCString()) == 0) {
-    EmitClassOf(expr->arguments());
-  } else if (strcmp("_Log", *name->ToCString()) == 0) {
-    EmitLog(expr->arguments());
-  } else if (strcmp("_RandomHeapNumber", *name->ToCString()) == 0) {
-    EmitRandomHeapNumber(expr->arguments());
-  } else if (strcmp("_SubString", *name->ToCString()) == 0) {
-    EmitSubString(expr->arguments());
-  } else if (strcmp("_RegExpExec", *name->ToCString()) == 0) {
-    EmitRegExpExec(expr->arguments());
-  } else if (strcmp("_ValueOf", *name->ToCString()) == 0) {
-    EmitValueOf(expr->arguments());
-  } else if (strcmp("_SetValueOf", *name->ToCString()) == 0) {
-    EmitSetValueOf(expr->arguments());
-  } else if (strcmp("_NumberToString", *name->ToCString()) == 0) {
-    EmitNumberToString(expr->arguments());
-  } else if (strcmp("_CharFromCode", *name->ToCString()) == 0) {
-    EmitCharFromCode(expr->arguments());
-  } else if (strcmp("_FastCharCodeAt", *name->ToCString()) == 0) {
-    EmitFastCharCodeAt(expr->arguments());
-  } else if (strcmp("_StringAdd", *name->ToCString()) == 0) {
-    EmitStringAdd(expr->arguments());
-  } else if (strcmp("_StringCompare", *name->ToCString()) == 0) {
-    EmitStringCompare(expr->arguments());
-  } else if (strcmp("_MathPow", *name->ToCString()) == 0) {
-    EmitMathPow(expr->arguments());
-  } else if (strcmp("_MathSin", *name->ToCString()) == 0) {
-    EmitMathSin(expr->arguments());
-  } else if (strcmp("_MathCos", *name->ToCString()) == 0) {
-    EmitMathCos(expr->arguments());
-  } else if (strcmp("_MathSqrt", *name->ToCString()) == 0) {
-    EmitMathSqrt(expr->arguments());
-  } else if (strcmp("_CallFunction", *name->ToCString()) == 0) {
-    EmitCallFunction(expr->arguments());
-  } else if (strcmp("_RegExpConstructResult", *name->ToCString()) == 0) {
-    EmitRegExpConstructResult(expr->arguments());
-  } else if (strcmp("_SwapElements", *name->ToCString()) == 0) {
-    EmitSwapElements(expr->arguments());
-  } else if (strcmp("_GetFromCache", *name->ToCString()) == 0) {
-    EmitGetFromCache(expr->arguments());
-  } else {
-    UNREACHABLE();
-  }
-}
-
-
-void FullCodeGenerator::EmitIsSmi(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  __ JumpIfSmi(rax, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsNonNegativeSmi(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  Condition positive_smi = __ CheckPositiveSmi(rax);
-  __ j(positive_smi, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsObject(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  __ JumpIfSmi(rax, if_false);
-  __ CompareRoot(rax, Heap::kNullValueRootIndex);
-  __ j(equal, if_true);
-  __ movq(rbx, FieldOperand(rax, HeapObject::kMapOffset));
-  // Undetectable objects behave like undefined when tested with typeof.
-  __ testb(FieldOperand(rbx, Map::kBitFieldOffset),
-           Immediate(1 << Map::kIsUndetectable));
-  __ j(not_zero, if_false);
-  __ movzxbq(rbx, FieldOperand(rbx, Map::kInstanceTypeOffset));
-  __ cmpq(rbx, Immediate(FIRST_JS_OBJECT_TYPE));
-  __ j(below, if_false);
-  __ cmpq(rbx, Immediate(LAST_JS_OBJECT_TYPE));
-  __ j(below_equal, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsUndetectableObject(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  __ JumpIfSmi(rax, if_false);
-  __ movq(rbx, FieldOperand(rax, HeapObject::kMapOffset));
-  __ testb(FieldOperand(rbx, Map::kBitFieldOffset),
-           Immediate(1 << Map::kIsUndetectable));
-  __ j(not_zero, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsFunction(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  __ JumpIfSmi(rax, if_false);
-  __ CmpObjectType(rax, JS_FUNCTION_TYPE, rbx);
-  __ j(equal, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsArray(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  __ JumpIfSmi(rax, if_false);
-  __ CmpObjectType(rax, JS_ARRAY_TYPE, rbx);
-  __ j(equal, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsRegExp(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  __ JumpIfSmi(rax, if_false);
-  __ CmpObjectType(rax, JS_REGEXP_TYPE, rbx);
-  __ j(equal, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-
-void FullCodeGenerator::EmitIsConstructCall(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 0);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  // Get the frame pointer for the calling frame.
-  __ movq(rax, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
-
-  // Skip the arguments adaptor frame if it exists.
-  Label check_frame_marker;
-  __ SmiCompare(Operand(rax, StandardFrameConstants::kContextOffset),
-                Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
-  __ j(not_equal, &check_frame_marker);
-  __ movq(rax, Operand(rax, StandardFrameConstants::kCallerFPOffset));
-
-  // Check the marker in the calling frame.
-  __ bind(&check_frame_marker);
-  __ SmiCompare(Operand(rax, StandardFrameConstants::kMarkerOffset),
-                Smi::FromInt(StackFrame::CONSTRUCT));
-  __ j(equal, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitObjectEquals(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 2);
-
-  // Load the two objects into registers and perform the comparison.
-  VisitForValue(args->at(0), kStack);
-  VisitForValue(args->at(1), kAccumulator);
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
-
-  __ pop(rbx);
-  __ cmpq(rax, rbx);
-  __ j(equal, if_true);
-  __ jmp(if_false);
-
-  Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitArguments(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  // ArgumentsAccessStub expects the key in edx and the formal
-  // parameter count in eax.
-  VisitForValue(args->at(0), kAccumulator);
-  __ movq(rdx, rax);
-  __ Move(rax, Smi::FromInt(scope()->num_parameters()));
-  ArgumentsAccessStub stub(ArgumentsAccessStub::READ_ELEMENT);
-  __ CallStub(&stub);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitArgumentsLength(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 0);
-
-  Label exit;
-  // Get the number of formal parameters.
-  __ Move(rax, Smi::FromInt(scope()->num_parameters()));
-
-  // Check if the calling frame is an arguments adaptor frame.
-  __ movq(rbx, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
-  __ SmiCompare(Operand(rbx, StandardFrameConstants::kContextOffset),
-                Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
-  __ j(not_equal, &exit);
-
-  // Arguments adaptor case: Read the arguments length from the
-  // adaptor frame.
-  __ movq(rax, Operand(rbx, ArgumentsAdaptorFrameConstants::kLengthOffset));
-
-  __ bind(&exit);
-  if (FLAG_debug_code) __ AbortIfNotSmi(rax);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitClassOf(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-  Label done, null, function, non_function_constructor;
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  // If the object is a smi, we return null.
-  __ JumpIfSmi(rax, &null);
-
-  // Check that the object is a JS object but take special care of JS
-  // functions to make sure they have 'Function' as their class.
-  __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rax);
-  __ j(below, &null);
-
-  // As long as JS_FUNCTION_TYPE is the last instance type and it is
-  // right after LAST_JS_OBJECT_TYPE, we can avoid checking for
-  // LAST_JS_OBJECT_TYPE.
-  ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);
-  ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1);
-  __ CmpInstanceType(rax, JS_FUNCTION_TYPE);
-  __ j(equal, &function);
-
-  // Check if the constructor in the map is a function.
-  __ movq(rax, FieldOperand(rax, Map::kConstructorOffset));
-  __ CmpObjectType(rax, JS_FUNCTION_TYPE, rbx);
-  __ j(not_equal, &non_function_constructor);
-
-  // rax now contains the constructor function. Grab the
-  // instance class name from there.
-  __ movq(rax, FieldOperand(rax, JSFunction::kSharedFunctionInfoOffset));
-  __ movq(rax, FieldOperand(rax, SharedFunctionInfo::kInstanceClassNameOffset));
-  __ jmp(&done);
-
-  // Functions have class 'Function'.
-  __ bind(&function);
-  __ Move(rax, Factory::function_class_symbol());
-  __ jmp(&done);
-
-  // Objects with a non-function constructor have class 'Object'.
-  __ bind(&non_function_constructor);
-  __ Move(rax, Factory::Object_symbol());
-  __ jmp(&done);
-
-  // Non-JS objects have class null.
-  __ bind(&null);
-  __ LoadRoot(rax, Heap::kNullValueRootIndex);
-
-  // All done.
-  __ bind(&done);
-
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitLog(ZoneList<Expression*>* args) {
-  // Conditionally generate a log call.
-  // Args:
-  //   0 (literal string): The type of logging (corresponds to the flags).
-  //     This is used to determine whether or not to generate the log call.
-  //   1 (string): Format string.  Access the string at argument index 2
-  //     with '%2s' (see Logger::LogRuntime for all the formats).
-  //   2 (array): Arguments to the format string.
-  ASSERT_EQ(args->length(), 3);
-#ifdef ENABLE_LOGGING_AND_PROFILING
-  if (CodeGenerator::ShouldGenerateLog(args->at(0))) {
-    VisitForValue(args->at(1), kStack);
-    VisitForValue(args->at(2), kStack);
-    __ CallRuntime(Runtime::kLog, 2);
-  }
-#endif
-  // Finally, we're expected to leave a value on the top of the stack.
-  __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitRandomHeapNumber(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 0);
-
-  Label slow_allocate_heapnumber;
-  Label heapnumber_allocated;
-
-  __ AllocateHeapNumber(rbx, rcx, &slow_allocate_heapnumber);
-  __ jmp(&heapnumber_allocated);
-
-  __ bind(&slow_allocate_heapnumber);
-  // To allocate a heap number, and ensure that it is not a smi, we
-  // call the runtime function FUnaryMinus on 0, returning the double
-  // -0.0.  A new, distinct heap number is returned each time.
-  __ Push(Smi::FromInt(0));
-  __ CallRuntime(Runtime::kNumberUnaryMinus, 1);
-  __ movq(rbx, rax);
-
-  __ bind(&heapnumber_allocated);
-
-  // Return a random uint32 number in rax.
-  // The fresh HeapNumber is in rbx, which is callee-save on both x64 ABIs.
-  __ PrepareCallCFunction(0);
-  __ CallCFunction(ExternalReference::random_uint32_function(), 0);
-
-  // Convert 32 random bits in rax to 0.(32 random bits) in a double
-  // by computing:
-  // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
-  __ movl(rcx, Immediate(0x49800000));  // 1.0 x 2^20 as single.
-  __ movd(xmm1, rcx);
-  __ movd(xmm0, rax);
-  __ cvtss2sd(xmm1, xmm1);
-  __ xorpd(xmm0, xmm1);
-  __ subsd(xmm0, xmm1);
-  __ movsd(FieldOperand(rbx, HeapNumber::kValueOffset), xmm0);
-
-  __ movq(rax, rbx);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitSubString(ZoneList<Expression*>* args) {
-  // Load the arguments on the stack and call the stub.
-  SubStringStub stub;
-  ASSERT(args->length() == 3);
-  VisitForValue(args->at(0), kStack);
-  VisitForValue(args->at(1), kStack);
-  VisitForValue(args->at(2), kStack);
-  __ CallStub(&stub);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitRegExpExec(ZoneList<Expression*>* args) {
-  // Load the arguments on the stack and call the stub.
-  RegExpExecStub stub;
-  ASSERT(args->length() == 4);
-  VisitForValue(args->at(0), kStack);
-  VisitForValue(args->at(1), kStack);
-  VisitForValue(args->at(2), kStack);
-  VisitForValue(args->at(3), kStack);
-  __ CallStub(&stub);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitValueOf(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);  // Load the object.
-
-  Label done;
-  // If the object is a smi return the object.
-  __ JumpIfSmi(rax, &done);
-  // If the object is not a value type, return the object.
-  __ CmpObjectType(rax, JS_VALUE_TYPE, rbx);
-  __ j(not_equal, &done);
-  __ movq(rax, FieldOperand(rax, JSValue::kValueOffset));
-
-  __ bind(&done);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitMathPow(ZoneList<Expression*>* args) {
-  // Load the arguments on the stack and call the runtime function.
-  ASSERT(args->length() == 2);
-  VisitForValue(args->at(0), kStack);
-  VisitForValue(args->at(1), kStack);
-  __ CallRuntime(Runtime::kMath_pow, 2);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitSetValueOf(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 2);
-
-  VisitForValue(args->at(0), kStack);  // Load the object.
-  VisitForValue(args->at(1), kAccumulator);  // Load the value.
-  __ pop(rbx);  // rax = value. ebx = object.
-
-  Label done;
-  // If the object is a smi, return the value.
-  __ JumpIfSmi(rbx, &done);
-
-  // If the object is not a value type, return the value.
-  __ CmpObjectType(rbx, JS_VALUE_TYPE, rcx);
-  __ j(not_equal, &done);
-
-  // Store the value.
-  __ movq(FieldOperand(rbx, JSValue::kValueOffset), rax);
-  // Update the write barrier.  Save the value as it will be
-  // overwritten by the write barrier code and is needed afterward.
-  __ movq(rdx, rax);
-  __ RecordWrite(rbx, JSValue::kValueOffset, rdx, rcx);
-
-  __ bind(&done);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitNumberToString(ZoneList<Expression*>* args) {
-  ASSERT_EQ(args->length(), 1);
-
-  // Load the argument on the stack and call the stub.
-  VisitForValue(args->at(0), kStack);
-
-  NumberToStringStub stub;
-  __ CallStub(&stub);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitCharFromCode(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  VisitForValue(args->at(0), kAccumulator);
-
-  Label slow_case, done;
-  // Fast case of Heap::LookupSingleCharacterStringFromCode.
-  __ JumpIfNotSmi(rax, &slow_case);
-  __ SmiToInteger32(rcx, rax);
-  __ cmpl(rcx, Immediate(String::kMaxAsciiCharCode));
-  __ j(above, &slow_case);
-
-  __ Move(rbx, Factory::single_character_string_cache());
-  __ movq(rbx, FieldOperand(rbx,
-                            rcx,
-                            times_pointer_size,
-                            FixedArray::kHeaderSize));
-
-  __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex);
-  __ j(equal, &slow_case);
-  __ movq(rax, rbx);
-  __ jmp(&done);
-
-  __ bind(&slow_case);
-  __ push(rax);
-  __ CallRuntime(Runtime::kCharFromCode, 1);
-
-  __ bind(&done);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitFastCharCodeAt(ZoneList<Expression*>* args) {
-  // TODO(fsc): Port the complete implementation from the classic back-end.
-  // Move the undefined value into the result register, which will
-  // trigger the slow case.
-  __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-  Apply(context_, rax);
-}
-
-void FullCodeGenerator::EmitStringAdd(ZoneList<Expression*>* args) {
-  ASSERT_EQ(2, args->length());
-
-  VisitForValue(args->at(0), kStack);
-  VisitForValue(args->at(1), kStack);
-
-  StringAddStub stub(NO_STRING_ADD_FLAGS);
-  __ CallStub(&stub);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitStringCompare(ZoneList<Expression*>* args) {
-  ASSERT_EQ(2, args->length());
-
-  VisitForValue(args->at(0), kStack);
-  VisitForValue(args->at(1), kStack);
-
-  StringCompareStub stub;
-  __ CallStub(&stub);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitMathSin(ZoneList<Expression*>* args) {
-  // Load the argument on the stack and call the stub.
-  TranscendentalCacheStub stub(TranscendentalCache::SIN);
-  ASSERT(args->length() == 1);
-  VisitForValue(args->at(0), kStack);
-  __ CallStub(&stub);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitMathCos(ZoneList<Expression*>* args) {
-  // Load the argument on the stack and call the stub.
-  TranscendentalCacheStub stub(TranscendentalCache::COS);
-  ASSERT(args->length() == 1);
-  VisitForValue(args->at(0), kStack);
-  __ CallStub(&stub);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitMathSqrt(ZoneList<Expression*>* args) {
-  // Load the argument on the stack and call the runtime function.
-  ASSERT(args->length() == 1);
-  VisitForValue(args->at(0), kStack);
-  __ CallRuntime(Runtime::kMath_sqrt, 1);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitCallFunction(ZoneList<Expression*>* args) {
-  ASSERT(args->length() >= 2);
-
-  int arg_count = args->length() - 2;  // For receiver and function.
-  VisitForValue(args->at(0), kStack);  // Receiver.
-  for (int i = 0; i < arg_count; i++) {
-    VisitForValue(args->at(i + 1), kStack);
-  }
-  VisitForValue(args->at(arg_count + 1), kAccumulator);  // Function.
-
-  // InvokeFunction requires function in rdi. Move it in there.
-  if (!result_register().is(rdi)) __ movq(rdi, result_register());
-  ParameterCount count(arg_count);
-  __ InvokeFunction(rdi, count, CALL_FUNCTION);
-  __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitRegExpConstructResult(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 3);
-  VisitForValue(args->at(0), kStack);
-  VisitForValue(args->at(1), kStack);
-  VisitForValue(args->at(2), kStack);
-  __ CallRuntime(Runtime::kRegExpConstructResult, 3);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitSwapElements(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 3);
-  VisitForValue(args->at(0), kStack);
-  VisitForValue(args->at(1), kStack);
-  VisitForValue(args->at(2), kStack);
-  __ CallRuntime(Runtime::kSwapElements, 3);
-  Apply(context_, rax);
-}
-
-
-void FullCodeGenerator::EmitGetFromCache(ZoneList<Expression*>* args) {
-  ASSERT_EQ(2, args->length());
-
-  ASSERT_NE(NULL, args->at(0)->AsLiteral());
-  int cache_id = Smi::cast(*(args->at(0)->AsLiteral()->handle()))->value();
-
-  Handle<FixedArray> jsfunction_result_caches(
-      Top::global_context()->jsfunction_result_caches());
-  if (jsfunction_result_caches->length() <= cache_id) {
-    __ Abort("Attempt to use undefined cache.");
-    __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-    Apply(context_, rax);
-    return;
-  }
-
-  VisitForValue(args->at(1), kAccumulator);
-
-  Register key = rax;
-  Register cache = rbx;
-  Register tmp = rcx;
-  __ movq(cache, CodeGenerator::ContextOperand(rsi, Context::GLOBAL_INDEX));
-  __ movq(cache,
-          FieldOperand(cache, GlobalObject::kGlobalContextOffset));
-  __ movq(cache,
-          CodeGenerator::ContextOperand(
-              cache, Context::JSFUNCTION_RESULT_CACHES_INDEX));
-  __ movq(cache,
-          FieldOperand(cache, FixedArray::OffsetOfElementAt(cache_id)));
-
-  Label done, not_found;
-  // tmp now holds finger offset as a smi.
-  ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
-  __ movq(tmp, FieldOperand(cache, JSFunctionResultCache::kFingerOffset));
-  SmiIndex index =
-      __ SmiToIndex(kScratchRegister, tmp, kPointerSizeLog2);
-  __ cmpq(key, FieldOperand(cache,
-                            index.reg,
-                            index.scale,
-                            FixedArray::kHeaderSize));
-  __ j(not_equal, &not_found);
-  __ movq(rax, FieldOperand(cache,
-                            index.reg,
-                            index.scale,
-                            FixedArray::kHeaderSize + kPointerSize));
-  __ jmp(&done);
-
-  __ bind(&not_found);
-  // Call runtime to perform the lookup.
-  __ push(cache);
-  __ push(key);
-  __ CallRuntime(Runtime::kGetFromCache, 2);
-
-  __ bind(&done);
-  Apply(context_, rax);
-}
-
-
 void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
-  Handle<String> name = expr->name();
-  if (name->length() > 0 && name->Get(0) == '_') {
-    Comment cmnt(masm_, "[ InlineRuntimeCall");
-    EmitInlineRuntimeCall(expr);
-    return;
-  }
-
   Comment cmnt(masm_, "[ CallRuntime");
   ZoneList<Expression*>* args = expr->arguments();
 
@@ -2637,46 +1511,6 @@
 
 void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
   switch (expr->op()) {
-    case Token::DELETE: {
-      Comment cmnt(masm_, "[ UnaryOperation (DELETE)");
-      Property* prop = expr->expression()->AsProperty();
-      Variable* var = expr->expression()->AsVariableProxy()->AsVariable();
-      if (prop == NULL && var == NULL) {
-        // Result of deleting non-property, non-variable reference is true.
-        // The subexpression may have side effects.
-        VisitForEffect(expr->expression());
-        Apply(context_, true);
-      } else if (var != NULL &&
-                 !var->is_global() &&
-                 var->slot() != NULL &&
-                 var->slot()->type() != Slot::LOOKUP) {
-        // Result of deleting non-global, non-dynamic variables is false.
-        // The subexpression does not have side effects.
-        Apply(context_, false);
-      } else {
-        // Property or variable reference.  Call the delete builtin with
-        // object and property name as arguments.
-        if (prop != NULL) {
-          VisitForValue(prop->obj(), kStack);
-          VisitForValue(prop->key(), kStack);
-        } else if (var->is_global()) {
-          __ push(CodeGenerator::GlobalObject());
-          __ Push(var->name());
-        } else {
-          // Non-global variable.  Call the runtime to look up the context
-          // where the variable was introduced.
-          __ push(context_register());
-          __ Push(var->name());
-          __ CallRuntime(Runtime::kLookupContext, 2);
-          __ push(rax);
-          __ Push(var->name());
-        }
-        __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
-        Apply(context_, rax);
-      }
-      break;
-    }
-
     case Token::VOID: {
       Comment cmnt(masm_, "[ UnaryOperation (VOID)");
       VisitForEffect(expr->expression());
@@ -2717,15 +1551,33 @@
 
     case Token::NOT: {
       Comment cmnt(masm_, "[ UnaryOperation (NOT)");
-      Label materialize_true, materialize_false;
-      Label* if_true = NULL;
-      Label* if_false = NULL;
-
-      // Notice that the labels are swapped.
-      PrepareTest(&materialize_true, &materialize_false, &if_false, &if_true);
-
+      Label materialize_true, materialize_false, done;
+      // Initially assume a pure test context.  Notice that the labels are
+      // swapped.
+      Label* if_true = false_label_;
+      Label* if_false = true_label_;
+      switch (context_) {
+        case Expression::kUninitialized:
+          UNREACHABLE();
+          break;
+        case Expression::kEffect:
+          if_true = &done;
+          if_false = &done;
+          break;
+        case Expression::kValue:
+          if_true = &materialize_false;
+          if_false = &materialize_true;
+          break;
+        case Expression::kTest:
+          break;
+        case Expression::kValueTest:
+          if_false = &materialize_true;
+          break;
+        case Expression::kTestValue:
+          if_true = &materialize_false;
+          break;
+      }
       VisitForControl(expr->expression(), if_true, if_false);
-
       Apply(context_, if_false, if_true);  // Labels swapped.
       break;
     }
@@ -2821,13 +1673,6 @@
 void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   Comment cmnt(masm_, "[ CountOperation");
 
-  // Invalid left-hand-sides are rewritten to have a 'throw
-  // ReferenceError' as the left-hand side.
-  if (!expr->expression()->IsValidLeftHandSide()) {
-    VisitForEffect(expr->expression());
-    return;
-  }
-
   // Expression can only be a property, a global or a (parameter or local)
   // slot. Variables with rewrite to .arguments are treated as KEYED_PROPERTY.
   enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY };
@@ -2848,7 +1693,7 @@
     EmitVariableLoad(expr->expression()->AsVariableProxy()->var(),
                      Expression::kValue);
     location_ = saved_location;
-  } else {
+  } else  {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && context_ != Expression::kEffect) {
       __ Push(Smi::FromInt(0));
@@ -3020,40 +1865,36 @@
 }
 
 
- void FullCodeGenerator::EmitNullCompare(bool strict,
-                                         Register obj,
-                                         Register null_const,
-                                         Label* if_true,
-                                         Label* if_false,
-                                         Register scratch) {
-   __ cmpq(obj, null_const);
-   if (strict) {
-     __ j(equal, if_true);
-   } else {
-     __ j(equal, if_true);
-     __ CompareRoot(obj, Heap::kUndefinedValueRootIndex);
-     __ j(equal, if_true);
-     __ JumpIfSmi(obj, if_false);
-     // It can be an undetectable object.
-     __ movq(scratch, FieldOperand(obj, HeapObject::kMapOffset));
-     __ testb(FieldOperand(scratch, Map::kBitFieldOffset),
-              Immediate(1 << Map::kIsUndetectable));
-     __ j(not_zero, if_true);
-   }
-   __ jmp(if_false);
- }
-
-
-
 void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
   Comment cmnt(masm_, "[ CompareOperation");
 
   // Always perform the comparison for its control flow.  Pack the result
   // into the expression's context after the comparison is performed.
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  PrepareTest(&materialize_true, &materialize_false, &if_true, &if_false);
+  Label materialize_true, materialize_false, done;
+  // Initially assume we are in a test context.
+  Label* if_true = true_label_;
+  Label* if_false = false_label_;
+  switch (context_) {
+    case Expression::kUninitialized:
+      UNREACHABLE();
+      break;
+    case Expression::kEffect:
+      if_true = &done;
+      if_false = &done;
+      break;
+    case Expression::kValue:
+      if_true = &materialize_true;
+      if_false = &materialize_false;
+      break;
+    case Expression::kTest:
+      break;
+    case Expression::kValueTest:
+      if_true = &materialize_true;
+      break;
+    case Expression::kTestValue:
+      if_false = &materialize_false;
+      break;
+  }
 
   VisitForValue(expr->left(), kStack);
   switch (expr->op()) {
@@ -3083,24 +1924,10 @@
         case Token::EQ_STRICT:
           strict = true;
           // Fall through.
-        case Token::EQ: {
+        case Token::EQ:
           cc = equal;
           __ pop(rdx);
-          // If either operand is constant null we do a fast compare
-          // against null.
-          Literal* right_literal = expr->right()->AsLiteral();
-          Literal* left_literal = expr->left()->AsLiteral();
-          if (right_literal != NULL && right_literal->handle()->IsNull()) {
-            EmitNullCompare(strict, rdx, rax, if_true, if_false, rcx);
-            Apply(context_, if_true, if_false);
-            return;
-          } else if (left_literal != NULL && left_literal->handle()->IsNull()) {
-            EmitNullCompare(strict, rax, rdx, if_true, if_false, rcx);
-            Apply(context_, if_true, if_false);
-            return;
-          }
           break;
-        }
         case Token::LT:
           cc = less;
           __ pop(rdx);