[es6] Super call in arrows and eval

src/arm64/full-codegen-arm64.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/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 225 matching lines @@
         } else if (FLAG_debug_code) {
           Label done;
           __ JumpIfInNewSpace(cp, &done);
           __ Abort(kExpectedNewSpaceObject);
           __ bind(&done);
         }
       }
     }
   }
 
+  // Possibly set up a local binding to the this function which is used in
+  // derived constructors with super calls.
+  Variable* this_function_var = scope()->this_function_var();
+  if (this_function_var != nullptr) {
+    Comment cmnt(masm_, "[ This function");
+    SetVar(this_function_var, x1, x0, x2);
+  }
+
+  Variable* new_target_var = scope()->new_target_var();
+  if (new_target_var != nullptr) {
+    Comment cmnt(masm_, "[ new.target");
+    // new.target is parameter -2.
+    int offset =
+        2 * kXRegSize + (info_->scope()->num_parameters() + 1) * kPointerSize;
+    __ Ldr(x0, MemOperand(fp, offset));
+    SetVar(new_target_var, x0, x2, x3);
+  }
+
   Variable* home_object_var = scope()->home_object_var();
   if (home_object_var != nullptr) {
     __ Push(x1);
   }
 
   ArgumentsAccessStub::HasNewTarget has_new_target =
       IsSubclassConstructor(info->function()->kind())
           ? ArgumentsAccessStub::HAS_NEW_TARGET
           : ArgumentsAccessStub::NO_NEW_TARGET;
 
@@ skipping 1706 matching lines @@
     case NAMED_PROPERTY:
       if (expr->is_compound()) {
         // We need the receiver both on the stack and in the register.
         VisitForStackValue(property->obj());
         __ Peek(LoadDescriptor::ReceiverRegister(), 0);
       } else {
         VisitForStackValue(property->obj());
       }
       break;
     case NAMED_SUPER_PROPERTY:
-      VisitForStackValue(property->obj()->AsSuperReference()->this_var());
+      VisitForStackValue(
+          property->obj()->AsSuperPropertyReference()->this_var());
       VisitForAccumulatorValue(
-          property->obj()->AsSuperReference()->home_object_var());
+          property->obj()->AsSuperPropertyReference()->home_object_var());
       __ Push(result_register());
       if (expr->is_compound()) {
         const Register scratch = x10;
         __ Peek(scratch, kPointerSize);
         __ Push(scratch, result_register());
       }
       break;
     case KEYED_SUPER_PROPERTY:
-      VisitForStackValue(property->obj()->AsSuperReference()->this_var());
       VisitForStackValue(
-          property->obj()->AsSuperReference()->home_object_var());
+          property->obj()->AsSuperPropertyReference()->this_var());
+      VisitForStackValue(
+          property->obj()->AsSuperPropertyReference()->home_object_var());
       VisitForAccumulatorValue(property->key());
       __ Push(result_register());
       if (expr->is_compound()) {
         const Register scratch1 = x10;
         const Register scratch2 = x11;
         __ Peek(scratch1, 2 * kPointerSize);
         __ Peek(scratch2, kPointerSize);
         __ Push(scratch1, scratch2, result_register());
       }
       break;
@@ skipping 336 matching lines @@
       __ Mov(StoreDescriptor::ReceiverRegister(), x0);
       __ Pop(StoreDescriptor::ValueRegister());  // Restore value.
       __ Mov(StoreDescriptor::NameRegister(),
              Operand(prop->key()->AsLiteral()->value()));
       if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
       CallStoreIC();
       break;
     }
     case NAMED_SUPER_PROPERTY: {
       __ Push(x0);
-      VisitForStackValue(prop->obj()->AsSuperReference()->this_var());
+      VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var());
       VisitForAccumulatorValue(
-          prop->obj()->AsSuperReference()->home_object_var());
+          prop->obj()->AsSuperPropertyReference()->home_object_var());
       // stack: value, this; x0: home_object
       Register scratch = x10;
       Register scratch2 = x11;
       __ mov(scratch, result_register());  // home_object
       __ Peek(x0, kPointerSize);           // value
       __ Peek(scratch2, 0);                // this
       __ Poke(scratch2, kPointerSize);     // this
       __ Poke(scratch, 0);                 // home_object
       // stack: this, home_object; x0: value
       EmitNamedSuperPropertyStore(prop);
       break;
     }
     case KEYED_SUPER_PROPERTY: {
       __ Push(x0);
-      VisitForStackValue(prop->obj()->AsSuperReference()->this_var());
-      VisitForStackValue(prop->obj()->AsSuperReference()->home_object_var());
+      VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var());
+      VisitForStackValue(
+          prop->obj()->AsSuperPropertyReference()->home_object_var());
       VisitForAccumulatorValue(prop->key());
       Register scratch = x10;
       Register scratch2 = x11;
       __ Peek(scratch2, 2 * kPointerSize);  // value
       // stack: value, this, home_object; x0: key, x11: value
       __ Peek(scratch, kPointerSize);  // this
       __ Poke(scratch, 2 * kPointerSize);
       __ Peek(scratch, 0);  // home_object
       __ Poke(scratch, kPointerSize);
       __ Poke(x0, 0);
@@ skipping 205 matching lines @@
 void FullCodeGenerator::VisitProperty(Property* expr) {
   Comment cmnt(masm_, "[ Property");
   Expression* key = expr->key();
 
   if (key->IsPropertyName()) {
     if (!expr->IsSuperAccess()) {
       VisitForAccumulatorValue(expr->obj());
       __ Move(LoadDescriptor::ReceiverRegister(), x0);
       EmitNamedPropertyLoad(expr);
     } else {
-      VisitForStackValue(expr->obj()->AsSuperReference()->this_var());
-      VisitForStackValue(expr->obj()->AsSuperReference()->home_object_var());
+      VisitForStackValue(expr->obj()->AsSuperPropertyReference()->this_var());
+      VisitForStackValue(
+          expr->obj()->AsSuperPropertyReference()->home_object_var());
       EmitNamedSuperPropertyLoad(expr);
     }
   } else {
     if (!expr->IsSuperAccess()) {
       VisitForStackValue(expr->obj());
       VisitForAccumulatorValue(expr->key());
       __ Move(LoadDescriptor::NameRegister(), x0);
       __ Pop(LoadDescriptor::ReceiverRegister());
       EmitKeyedPropertyLoad(expr);
     } else {
-      VisitForStackValue(expr->obj()->AsSuperReference()->this_var());
-      VisitForStackValue(expr->obj()->AsSuperReference()->home_object_var());
+      VisitForStackValue(expr->obj()->AsSuperPropertyReference()->this_var());
+      VisitForStackValue(
+          expr->obj()->AsSuperPropertyReference()->home_object_var());
       VisitForStackValue(expr->key());
       EmitKeyedSuperPropertyLoad(expr);
     }
   }
   PrepareForBailoutForId(expr->LoadId(), TOS_REG);
   context()->Plug(x0);
 }
 
 
 void FullCodeGenerator::CallIC(Handle<Code> code,
@@ skipping 47 matching lines @@
   DCHECK(callee->IsProperty());
   Property* prop = callee->AsProperty();
   DCHECK(prop->IsSuperAccess());
 
   SetSourcePosition(prop->position());
   Literal* key = prop->key()->AsLiteral();
   DCHECK(!key->value()->IsSmi());
 
   // Load the function from the receiver.
   const Register scratch = x10;
-  SuperReference* super_ref = callee->AsProperty()->obj()->AsSuperReference();
+  SuperPropertyReference* super_ref =
+      callee->AsProperty()->obj()->AsSuperPropertyReference();
   VisitForStackValue(super_ref->home_object_var());
   VisitForAccumulatorValue(super_ref->this_var());
   __ Push(x0);
   __ Peek(scratch, kPointerSize);
   __ Push(x0, scratch);
   __ Push(key->value());
 
   // Stack here:
   //  - home_object
   //  - this (receiver)
@@ skipping 38 matching lines @@
 void FullCodeGenerator::EmitKeyedSuperCallWithLoadIC(Call* expr) {
   Expression* callee = expr->expression();
   DCHECK(callee->IsProperty());
   Property* prop = callee->AsProperty();
   DCHECK(prop->IsSuperAccess());
 
   SetSourcePosition(prop->position());
 
   // Load the function from the receiver.
   const Register scratch = x10;
-  SuperReference* super_ref = callee->AsProperty()->obj()->AsSuperReference();
+  SuperPropertyReference* super_ref =
+      callee->AsProperty()->obj()->AsSuperPropertyReference();
   VisitForStackValue(super_ref->home_object_var());
   VisitForAccumulatorValue(super_ref->this_var());
   __ Push(x0);
   __ Peek(scratch, kPointerSize);
   __ Push(x0, scratch);
   VisitForStackValue(prop->key());
 
   // Stack here:
   //  - home_object
   //  - this (receiver)
@@ skipping 60 matching lines @@
   __ Mov(x13, Smi::FromInt(scope()->start_position()));
 
   // Push.
   __ Push(x9, x10, x11, x12, x13);
 
   // Do the runtime call.
   __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 6);
 }
 
 
-void FullCodeGenerator::EmitLoadSuperConstructor() {
-  __ ldr(x0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
-  __ Push(x0);
-  __ CallRuntime(Runtime::kGetPrototype, 1);
-}
-
-
 void FullCodeGenerator::EmitInitializeThisAfterSuper(
-    SuperReference* super_ref, FeedbackVectorICSlot slot) {
+    SuperCallReference* super_ref, FeedbackVectorICSlot slot) {
   Variable* this_var = super_ref->this_var()->var();
   GetVar(x1, this_var);
   Label uninitialized_this;
   __ JumpIfRoot(x1, Heap::kTheHoleValueRootIndex, &uninitialized_this);
   __ Mov(x0, Operand(this_var->name()));
   __ Push(x0);
   __ CallRuntime(Runtime::kThrowReferenceError, 1);
   __ bind(&uninitialized_this);
 
   EmitVariableAssignment(this_var, Token::INIT_CONST, slot);
@@ skipping 139 matching lines @@
 
 void FullCodeGenerator::VisitCallNew(CallNew* expr) {
   Comment cmnt(masm_, "[ CallNew");
   // According to ECMA-262, section 11.2.2, page 44, the function
   // expression in new calls must be evaluated before the
   // arguments.
 
   // Push constructor on the stack.  If it's not a function it's used as
   // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is
   // ignored.
-  DCHECK(!expr->expression()->IsSuperReference());
+  DCHECK(!expr->expression()->IsSuperPropertyReference());
   VisitForStackValue(expr->expression());
 
   // Push the arguments ("left-to-right") on the stack.
   ZoneList<Expression*>* args = expr->arguments();
   int arg_count = args->length();
   for (int i = 0; i < arg_count; i++) {
     VisitForStackValue(args->at(i));
   }
 
   // Call the construct call builtin that handles allocation and
@@ skipping 15 matching lines @@
   __ Mov(x3, SmiFromSlot(expr->CallNewFeedbackSlot()));
 
   CallConstructStub stub(isolate(), RECORD_CONSTRUCTOR_TARGET);
   __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
   PrepareForBailoutForId(expr->ReturnId(), TOS_REG);
   context()->Plug(x0);
 }
 
 
 void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
-  Variable* new_target_var = scope()->DeclarationScope()->new_target_var();
-  GetVar(result_register(), new_target_var);
-  __ Push(result_register());
+  SuperCallReference* super_call_ref =
+      expr->expression()->AsSuperCallReference();
+  DCHECK_NOT_NULL(super_call_ref);
 
-  EmitLoadSuperConstructor();
+  VariableProxy* new_target_proxy = super_call_ref->new_target_var();
+  VisitForStackValue(new_target_proxy);
+
+  EmitLoadSuperConstructor(super_call_ref);
   __ push(result_register());
 
   // Push the arguments ("left-to-right") on the stack.
   ZoneList<Expression*>* args = expr->arguments();
   int arg_count = args->length();
   for (int i = 0; i < arg_count; i++) {
     VisitForStackValue(args->at(i));
   }
 
   // Call the construct call builtin that handles allocation and
@@ skipping 17 matching lines @@
   __ LoadObject(x2, FeedbackVector());
   __ Mov(x3, SmiFromSlot(expr->CallFeedbackSlot()));
 
   CallConstructStub stub(isolate(), SUPER_CALL_RECORD_TARGET);
   __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
 
   __ Drop(1);
 
   RecordJSReturnSite(expr);
 
-  EmitInitializeThisAfterSuper(expr->expression()->AsSuperReference(),
-                               expr->CallFeedbackICSlot());
+  EmitInitializeThisAfterSuper(super_call_ref, expr->CallFeedbackICSlot());
   context()->Plug(x0);
 }
 
 
 void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 1);
 
   VisitForAccumulatorValue(args->at(0));
 
@@ skipping 859 matching lines @@
   __ Bind(&runtime);
   __ Push(x0);
   __ CallRuntime(Runtime::kCall, args->length());
   __ Bind(&done);
 
   context()->Plug(x0);
 }
 
 
 void FullCodeGenerator::EmitDefaultConstructorCallSuper(CallRuntime* expr) {
-  Variable* new_target_var = scope()->DeclarationScope()->new_target_var();
-  GetVar(result_register(), new_target_var);
-  __ Push(result_register());
+  ZoneList<Expression*>* args = expr->arguments();
+  DCHECK(args->length() == 2);
 
-  EmitLoadSuperConstructor();
+  // new.target
+  VisitForStackValue(args->at(0));
+
+  // .this_function
+  VisitForStackValue(args->at(1));
+  __ CallRuntime(Runtime::kGetPrototype, 1);
   __ Push(result_register());
 
   // Check if the calling frame is an arguments adaptor frame.
   Label adaptor_frame, args_set_up, runtime;
   __ Ldr(x11, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
   __ Ldr(x12, MemOperand(x11, StandardFrameConstants::kContextOffset));
   __ Cmp(x12, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
   __ B(eq, &adaptor_frame);
   // default constructor has no arguments, so no adaptor frame means no args.
   __ Mov(x0, Operand(0));
@@ skipping 356 matching lines @@
   context()->Plug(x0);
 }
 
 
 void FullCodeGenerator::EmitCallSuperWithSpread(CallRuntime* expr) {
   // Assert: expr === CallRuntime("ReflectConstruct")
   CallRuntime* call = expr->arguments()->at(0)->AsCallRuntime();
   ZoneList<Expression*>* args = call->arguments();
   DCHECK_EQ(3, args->length());
 
-  SuperReference* super_reference = args->at(0)->AsSuperReference();
+  SuperCallReference* super_call_ref = args->at(0)->AsSuperCallReference();
+  DCHECK_NOT_NULL(super_call_ref);
 
   // Load ReflectConstruct function
   EmitLoadJSRuntimeFunction(call);
 
   // Push the target function under the receiver.
   __ Pop(x10);
   __ Push(x0, x10);
 
-  // Push super
-  EmitLoadSuperConstructor();
+  // Push super constructor
+  EmitLoadSuperConstructor(super_call_ref);
   __ Push(result_register());
 
   // Push arguments array
   VisitForStackValue(args->at(1));
 
   // Push NewTarget
   DCHECK(args->at(2)->IsVariableProxy());
   VisitForStackValue(args->at(2));
 
   EmitCallJSRuntimeFunction(call);
 
   // Restore context register.
   __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   context()->DropAndPlug(1, x0);
 
   // TODO(mvstanton): with FLAG_vector_stores this needs a slot id.
-  EmitInitializeThisAfterSuper(super_reference);
+  EmitInitializeThisAfterSuper(super_call_ref);
 }
 
 
 void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) {
   // Push the builtins object as the receiver.
   __ Ldr(x10, GlobalObjectMemOperand());
   __ Ldr(LoadDescriptor::ReceiverRegister(),
          FieldMemOperand(x10, GlobalObject::kBuiltinsOffset));
   __ Push(LoadDescriptor::ReceiverRegister());
 
@@ skipping 201 matching lines @@
     switch (assign_type) {
       case NAMED_PROPERTY: {
         // Put the object both on the stack and in the register.
         VisitForStackValue(prop->obj());
         __ Peek(LoadDescriptor::ReceiverRegister(), 0);
         EmitNamedPropertyLoad(prop);
         break;
       }
 
       case NAMED_SUPER_PROPERTY: {
-        VisitForStackValue(prop->obj()->AsSuperReference()->this_var());
+        VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var());
         VisitForAccumulatorValue(
-            prop->obj()->AsSuperReference()->home_object_var());
+            prop->obj()->AsSuperPropertyReference()->home_object_var());
         __ Push(result_register());
         const Register scratch = x10;
         __ Peek(scratch, kPointerSize);
         __ Push(scratch, result_register());
         EmitNamedSuperPropertyLoad(prop);
         break;
       }
 
       case KEYED_SUPER_PROPERTY: {
-        VisitForStackValue(prop->obj()->AsSuperReference()->this_var());
-        VisitForStackValue(prop->obj()->AsSuperReference()->home_object_var());
+        VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var());
+        VisitForStackValue(
+            prop->obj()->AsSuperPropertyReference()->home_object_var());
         VisitForAccumulatorValue(prop->key());
         __ Push(result_register());
         const Register scratch1 = x10;
         const Register scratch2 = x11;
         __ Peek(scratch1, 2 * kPointerSize);
         __ Peek(scratch2, kPointerSize);
         __ Push(scratch1, scratch2, result_register());
         EmitKeyedSuperPropertyLoad(prop);
         break;
       }
@@ skipping 948 matching lines @@
     }
   }
 
   return INTERRUPT;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64