[es6] Tail calls support.

src/crankshaft/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast-numbering.h"
@@ skipping 6556 matching lines @@
     int argument_count = 1;
     if (!info->IsLoad()) {
       argument_count = 2;
       Push(value);
     }
 
     if (info->NeedsWrappingFor(info->accessor())) {
       HValue* function = Add<HConstant>(info->accessor());
       PushArgumentsFromEnvironment(argument_count);
       return New<HCallFunction>(function, argument_count,
-                                ConvertReceiverMode::kNotNullOrUndefined);
+                                ConvertReceiverMode::kNotNullOrUndefined,
+                                TailCallMode::kDisallow);
     } else if (FLAG_inline_accessors && can_inline_accessor) {
       bool success = info->IsLoad()
           ? TryInlineGetter(info->accessor(), info->map(), ast_id, return_id)
           : TryInlineSetter(
               info->accessor(), info->map(), ast_id, return_id, value);
       if (success || HasStackOverflow()) return NULL;
     }
 
     PushArgumentsFromEnvironment(argument_count);
     return BuildCallConstantFunction(info->accessor(), argument_count);
@@ skipping 1554 matching lines @@
       // entire compilation by setting stack overflow on the visitor.
       if (HasStackOverflow()) return;
     } else {
       // Since HWrapReceiver currently cannot actually wrap numbers and strings,
       // use the regular CallFunctionStub for method calls to wrap the receiver.
       // TODO(verwaest): Support creation of value wrappers directly in
       // HWrapReceiver.
       HInstruction* call =
           needs_wrapping ? NewUncasted<HCallFunction>(
                                function, argument_count,
-                               ConvertReceiverMode::kNotNullOrUndefined)
+                               ConvertReceiverMode::kNotNullOrUndefined,
+                               expr->tail_call_mode())
                          : BuildCallConstantFunction(target, argument_count);
       PushArgumentsFromEnvironment(argument_count);
       AddInstruction(call);
       Drop(1);  // Drop the function.
       if (!ast_context()->IsEffect()) Push(call);
     }
 
     if (current_block() != NULL) Goto(join);
     set_current_block(if_false);
   }
@@ skipping 10 matching lines @@
                           name, NULL, prop->IsUninitialized());
     AddInstruction(function);
     Push(function);
     AddSimulate(prop->LoadId(), REMOVABLE_SIMULATE);
 
     environment()->SetExpressionStackAt(1, function);
     environment()->SetExpressionStackAt(0, receiver);
     CHECK_ALIVE(VisitExpressions(expr->arguments()));
 
     HInstruction* call = New<HCallFunction>(
-        function, argument_count, ConvertReceiverMode::kNotNullOrUndefined);
+        function, argument_count, ConvertReceiverMode::kNotNullOrUndefined,
+        expr->tail_call_mode());
 
     PushArgumentsFromEnvironment(argument_count);
 
     Drop(1);  // Function.
 
     if (join != NULL) {
       AddInstruction(call);
       if (!ast_context()->IsEffect()) Push(call);
       Goto(join);
     } else {
@@ skipping 1506 matching lines @@
       if (TryInlineApiMethodCall(expr, receiver, maps)) return;
 
       // Wrap the receiver if necessary.
       if (NeedsWrapping(maps->first(), known_function)) {
         // Since HWrapReceiver currently cannot actually wrap numbers and
         // strings, use the regular CallFunctionStub for method calls to wrap
         // the receiver.
         // TODO(verwaest): Support creation of value wrappers directly in
         // HWrapReceiver.
         call = New<HCallFunction>(function, argument_count,
-                                  ConvertReceiverMode::kNotNullOrUndefined);
+                                  ConvertReceiverMode::kNotNullOrUndefined,
+                                  expr->tail_call_mode());
       } else if (TryInlineCall(expr)) {
         return;
       } else {
         call = BuildCallConstantFunction(known_function, argument_count);
       }
 
     } else {
       ArgumentsAllowedFlag arguments_flag = ARGUMENTS_NOT_ALLOWED;
       if (CanBeFunctionApplyArguments(expr) && expr->is_uninitialized()) {
         // We have to use EAGER deoptimization here because Deoptimizer::SOFT
         // gets ignored by the always-opt flag, which leads to incorrect code.
         Add<HDeoptimize>(
             Deoptimizer::kInsufficientTypeFeedbackForCallWithArguments,
             Deoptimizer::EAGER);
         arguments_flag = ARGUMENTS_FAKED;
       }
 
       // Push the function under the receiver.
       environment()->SetExpressionStackAt(0, function);
       Push(receiver);
 
       CHECK_ALIVE(VisitExpressions(expr->arguments(), arguments_flag));
       call = New<HCallFunction>(function, argument_count,
-                                ConvertReceiverMode::kNotNullOrUndefined);
+                                ConvertReceiverMode::kNotNullOrUndefined,
+                                expr->tail_call_mode());
     }
     PushArgumentsFromEnvironment(argument_count);
 
   } else {
     VariableProxy* proxy = expr->expression()->AsVariableProxy();
     if (proxy != NULL && proxy->var()->is_possibly_eval(isolate())) {
       return Bailout(kPossibleDirectCallToEval);
     }
 
     // The function is on the stack in the unoptimized code during
@@ skipping 30 matching lines @@
       }
       if (TryInlineApiFunctionCall(expr, receiver)) return;
       if (TryHandleArrayCall(expr, function)) return;
       if (TryInlineCall(expr)) return;
 
       PushArgumentsFromEnvironment(argument_count);
       call = BuildCallConstantFunction(expr->target(), argument_count);
     } else {
       PushArgumentsFromEnvironment(argument_count);
       HCallFunction* call_function = New<HCallFunction>(
-          function, argument_count, ConvertReceiverMode::kNullOrUndefined);
+          function, argument_count, ConvertReceiverMode::kNullOrUndefined,
+          expr->tail_call_mode());
       call = call_function;
       if (expr->is_uninitialized() &&
           expr->IsUsingCallFeedbackICSlot(isolate())) {
         // We've never seen this call before, so let's have Crankshaft learn
         // through the type vector.
         Handle<TypeFeedbackVector> vector =
             handle(current_feedback_vector(), isolate());
         FeedbackVectorSlot slot = expr->CallFeedbackICSlot();
         call_function->SetVectorAndSlot(vector, slot);
       }
@@ skipping 3791 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8