Support for super keyed loads where key is a name.

src/x64/full-codegen-x64.cc

 // Copyright 2012 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_X64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 2314 matching lines @@
   if (FLAG_vector_ics) {
     __ Move(VectorLoadICDescriptor::SlotRegister(),
             Smi::FromInt(prop->PropertyFeedbackSlot()));
     CallIC(ic);
   } else {
     CallIC(ic, prop->PropertyFeedbackId());
   }
 }
 
 
+void FullCodeGenerator::EmitKeyedSuperPropertyLoad(Property* prop) {
+  // Stack: receiver, home_object, key.
+  SetSourcePosition(prop->position());
+
+  __ CallRuntime(Runtime::kLoadKeyedFromSuper, 3);
+}
+
+
 void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
                                               Token::Value op,
                                               OverwriteMode mode,
                                               Expression* left,
                                               Expression* right) {
   // Do combined smi check of the operands. Left operand is on the
   // stack (popped into rdx). Right operand is in rax but moved into
   // rcx to make the shifts easier.
   Label done, stub_call, smi_case;
   __ Pop(rdx);
@@ skipping 247 matching lines @@
       EmitNamedPropertyLoad(expr);
     } else {
       VisitForStackValue(expr->obj()->AsSuperReference()->this_var());
       EmitLoadHomeObject(expr->obj()->AsSuperReference());
       __ Push(result_register());
       EmitNamedSuperPropertyLoad(expr);
     }
     PrepareForBailoutForId(expr->LoadId(), TOS_REG);
     context()->Plug(rax);
   } else {
-    VisitForStackValue(expr->obj());
-    VisitForAccumulatorValue(expr->key());
-    __ Move(LoadDescriptor::NameRegister(), rax);
-    __ Pop(LoadDescriptor::ReceiverRegister());
-    EmitKeyedPropertyLoad(expr);
+    if (!expr->IsSuperAccess()) {
+      VisitForStackValue(expr->obj());
+      VisitForAccumulatorValue(expr->key());
+      __ Move(LoadDescriptor::NameRegister(), rax);
+      __ Pop(LoadDescriptor::ReceiverRegister());
+      EmitKeyedPropertyLoad(expr);
+    } else {
+      VisitForStackValue(expr->obj()->AsSuperReference()->this_var());
+      EmitLoadHomeObject(expr->obj()->AsSuperReference());
+      __ Push(result_register());
+      VisitForStackValue(expr->key());
+      EmitKeyedSuperPropertyLoad(expr);
+    }
     context()->Plug(rax);
   }
 }
 
 
 void FullCodeGenerator::CallIC(Handle<Code> code,
                                TypeFeedbackId ast_id) {
   ic_total_count_++;
   __ call(code, RelocInfo::CODE_TARGET, ast_id);
 }
@@ skipping 83 matching lines @@
   PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);
 
   // Push the target function under the receiver.
   __ Push(Operand(rsp, 0));
   __ movp(Operand(rsp, kPointerSize), rax);
 
   EmitCall(expr, CallICState::METHOD);
 }
 
 
+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.
+  SuperReference* super_ref = prop->obj()->AsSuperReference();
+  EmitLoadHomeObject(super_ref);
+  __ Push(rax);
+  VisitForAccumulatorValue(super_ref->this_var());
+  __ Push(rax);
+  __ Push(rax);
+  __ Push(Operand(rsp, kPointerSize * 2));
+  VisitForStackValue(prop->key());
+
+  // Stack here:
+  //  - home_object
+  //  - this (receiver)
+  //  - this (receiver) <-- LoadFromSuper will pop here and below.
+  //  - home_object
+  //  - key
+  __ CallRuntime(Runtime::kLoadKeyedFromSuper, 3);
+
+  // Replace home_object with target function.
+  __ movp(Operand(rsp, kPointerSize), rax);
+
+  // Stack here:
+  // - target function
+  // - this (receiver)
+  EmitCall(expr, CallICState::METHOD);
+}
+
+
 void FullCodeGenerator::EmitCall(Call* expr, CallICState::CallType call_type) {
   // Load the arguments.
   ZoneList<Expression*>* args = expr->arguments();
   int arg_count = args->length();
   { PreservePositionScope scope(masm()->positions_recorder());
     for (int i = 0; i < arg_count; i++) {
       VisitForStackValue(args->at(i));
     }
   }
 
@@ skipping 122 matching lines @@
       __ PushRoot(Heap::kUndefinedValueRootIndex);
       __ bind(&call);
     }
 
     // The receiver is either the global receiver or an object found by
     // LoadContextSlot.
     EmitCall(expr);
   } else if (call_type == Call::PROPERTY_CALL) {
     Property* property = callee->AsProperty();
     bool is_named_call = property->key()->IsPropertyName();
-    // super.x() is handled in EmitCallWithLoadIC.
-    if (property->IsSuperAccess() && is_named_call) {
-      EmitSuperCallWithLoadIC(expr);
+    if (property->IsSuperAccess()) {
+      if (is_named_call) {
+        EmitSuperCallWithLoadIC(expr);
+      } else {
+        EmitKeyedSuperCallWithLoadIC(expr);
+      }
     } else {
       {
         PreservePositionScope scope(masm()->positions_recorder());
         VisitForStackValue(property->obj());
       }
       if (is_named_call) {
         EmitCallWithLoadIC(expr);
       } else {
         EmitKeyedCallWithLoadIC(expr, property->key());
       }
@@ skipping 2126 matching lines @@
   DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(),
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64