MIPS: Implement loads and calls from 'super’.

src/mips/full-codegen-mips.cc

Index: src/mips/full-codegen-mips.cc
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 53915c5679ba9ed27e05739b1a312e02e6c956d3..568b8bd3c4909320b992ba257d65a9924caebd49 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -1342,6 +1342,24 @@ void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
 }
 
 
+void FullCodeGenerator::EmitLoadHomeObject(SuperReference* expr) {
+  Comment cnmt(masm_, "[ SuperReference ");
+
+  __ lw(LoadDescriptor::ReceiverRegister(),
+        MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+
+  Handle<Symbol> home_object_symbol(isolate()->heap()->home_object_symbol());
+  __ li(LoadDescriptor::NameRegister(), home_object_symbol);
+
+  CallLoadIC(NOT_CONTEXTUAL, expr->HomeObjectFeedbackId());
+
+  Label done;
+  __ Branch(&done, ne, v0, Operand(isolate()->factory()->undefined_value()));
+  __ CallRuntime(Runtime::kThrowNonMethodError, 0);
+  __ bind(&done);
+}
+
+
 void FullCodeGenerator::EmitLoadGlobalCheckExtensions(VariableProxy* proxy,
                                                       TypeofState typeof_state,
                                                       Label* slow) {
@@ -2281,6 +2299,7 @@ void FullCodeGenerator::EmitCreateIteratorResult(bool done) {
 void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) {
   SetSourcePosition(prop->position());
   Literal* key = prop->key()->AsLiteral();
+
   __ li(LoadDescriptor::NameRegister(), Operand(key->value()));
   if (FLAG_vector_ics) {
     __ li(VectorLoadICDescriptor::SlotRegister(),
@@ -2292,6 +2311,21 @@ void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) {
 }
 
 
+void FullCodeGenerator::EmitNamedSuperPropertyLoad(Property* prop) {
+  SetSourcePosition(prop->position());
+  Literal* key = prop->key()->AsLiteral();
+  DCHECK(!key->value()->IsSmi());
+  DCHECK(prop->IsSuperAccess());
+
+  SuperReference* super_ref = prop->obj()->AsSuperReference();
+  EmitLoadHomeObject(super_ref);
+  __ Push(v0);
+  VisitForStackValue(super_ref->this_var());
+  __ Push(key->value());
+  __ CallRuntime(Runtime::kLoadFromSuper, 3);
+}
+
+
 void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) {
   SetSourcePosition(prop->position());
   Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate()).code();
@@ -2585,9 +2619,13 @@ void FullCodeGenerator::VisitProperty(Property* expr) {
   Expression* key = expr->key();
 
   if (key->IsPropertyName()) {
-    VisitForAccumulatorValue(expr->obj());
-    __ Move(LoadDescriptor::ReceiverRegister(), v0);
-    EmitNamedPropertyLoad(expr);
+    if (!expr->IsSuperAccess()) {
+      VisitForAccumulatorValue(expr->obj());
+      __ Move(LoadDescriptor::ReceiverRegister(), v0);
+      EmitNamedPropertyLoad(expr);
+    } else {
+      EmitNamedSuperPropertyLoad(expr);
+    }
     PrepareForBailoutForId(expr->LoadId(), TOS_REG);
     context()->Plug(v0);
   } else {
@@ -2627,6 +2665,7 @@ void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {
   } else {
     // Load the function from the receiver.
     DCHECK(callee->IsProperty());
+    DCHECK(!callee->AsProperty()->IsSuperAccess());
     __ lw(LoadDescriptor::ReceiverRegister(), MemOperand(sp, 0));
     EmitNamedPropertyLoad(callee->AsProperty());
     PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);
@@ -2640,6 +2679,44 @@ void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {
 }
 
 
+void FullCodeGenerator::EmitSuperCallWithLoadIC(Call* expr) {
+  Expression* callee = expr->expression();
+  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 = a1;
+  SuperReference* super_ref = prop->obj()->AsSuperReference();
+  EmitLoadHomeObject(super_ref);
+  __ Push(v0);
+  VisitForAccumulatorValue(super_ref->this_var());
+  __ Push(v0);
+  __ lw(scratch, MemOperand(sp, kPointerSize));
+  __ Push(scratch, v0);
+  __ Push(key->value());
+
+  // Stack here:
+  //  - home_object
+  //  - this (receiver)
+  //  - home_object <-- LoadFromSuper will pop here and below.
+  //  - this (receiver)
+  //  - key
+  __ CallRuntime(Runtime::kLoadFromSuper, 3);
+
+  // Replace home_object with target function.
+  __ sw(v0, MemOperand(sp, kPointerSize));
+
+  // Stack here:
+  // - target function
+  // - this (receiver)
+  EmitCall(expr, CallICState::METHOD);
+}
+
+
 // Code common for calls using the IC.
 void FullCodeGenerator::EmitKeyedCallWithLoadIC(Call* expr,
                                                 Expression* key) {
@@ -2807,13 +2884,20 @@ void FullCodeGenerator::VisitCall(Call* expr) {
     EmitCall(expr);
   } else if (call_type == Call::PROPERTY_CALL) {
     Property* property = callee->AsProperty();
-    { PreservePositionScope scope(masm()->positions_recorder());
-      VisitForStackValue(property->obj());
-    }
-    if (property->key()->IsPropertyName()) {
-      EmitCallWithLoadIC(expr);
+    bool is_named_call = property->key()->IsPropertyName();
+    // super.x() is handled in EmitCallWithLoadIC.
+    if (property->IsSuperAccess() && is_named_call) {
+      EmitSuperCallWithLoadIC(expr);
     } else {
-      EmitKeyedCallWithLoadIC(expr, property->key());
+      {
+        PreservePositionScope scope(masm()->positions_recorder());
+        VisitForStackValue(property->obj());
+      }
+      if (is_named_call) {
+        EmitCallWithLoadIC(expr);
+      } else {
+        EmitKeyedCallWithLoadIC(expr, property->key());
+      }
     }
   } else {
     DCHECK(call_type == Call::OTHER_CALL);