new classes: implement default constructors.

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index ca51dc32e64b52ded204a2028971eddf71550955..b5ee8688d4a6f8a0f41d4bebeda9d94d30b19727 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -2955,8 +2955,7 @@ void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
 }
 
 
-void FullCodeGenerator::EmitLoadSuperConstructor(SuperReference* super_ref) {
-  DCHECK(super_ref != NULL);
+void FullCodeGenerator::EmitLoadSuperConstructor() {
   __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
   __ CallRuntime(Runtime::kGetPrototype, 1);
 }
@@ -3074,7 +3073,7 @@ void FullCodeGenerator::VisitCall(Call* expr) {
       EmitSuperConstructorCall(expr);
     } else {
       SuperReference* super_ref = callee->AsSuperReference();
-      EmitLoadSuperConstructor(super_ref);
+      EmitLoadSuperConstructor();
       __ push(result_register());
       VisitForStackValue(super_ref->this_var());
       EmitCall(expr, CallICState::METHOD);
@@ -3107,7 +3106,7 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
   // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is
   // ignored.
   if (expr->expression()->IsSuperReference()) {

[arv (Not doing code reviews), 2015/02/11 14:53:48]

This is dead code... see https://codereview.chromium.org/911223002/

[Dmitry Lomov (no reviews), 2015/02/11 16:29:36]

Will rebase

-    EmitLoadSuperConstructor(expr->expression()->AsSuperReference());
+    EmitLoadSuperConstructor();
     __ push(result_register());
   } else {
     VisitForStackValue(expr->expression());
@@ -3151,7 +3150,7 @@ void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
   __ push(eax);
 
   SuperReference* super_ref = expr->expression()->AsSuperReference();
-  EmitLoadSuperConstructor(super_ref);
+  EmitLoadSuperConstructor();
   __ push(result_register());
 
   Variable* this_var = super_ref->this_var()->var();
@@ -4074,6 +4073,56 @@ void FullCodeGenerator::EmitCallFunction(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitDefaultConstructorCallSuper(CallRuntime* expr) {
+  Variable* new_target_var = scope()->DeclarationScope()->new_target_var();
+  GetVar(eax, new_target_var);
+  __ push(eax);
+
+  EmitLoadSuperConstructor();
+  __ push(result_register());
+
+

[arv (Not doing code reviews), 2015/02/11 14:53:48]

remove empty line

[Dmitry Lomov (no reviews), 2015/02/11 16:29:36]

Done.

+  // Check if the calling frame is an arguments adaptor frame.
+  Label adaptor_frame, args_set_up, runtime;
+  __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
+  __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset));
+  __ cmp(ecx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
+  __ j(equal, &adaptor_frame);
+  // default constructor has no arguments, so no adaptor frame means no args.
+  __ mov(eax, Immediate(0));
+  __ jmp(&args_set_up);
+
+  // Copy arguments from adaptor frame.
+  {
+    __ bind(&adaptor_frame);
+    __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset));
+    __ SmiUntag(ecx);
+
+    // Subtract 1 from smi-tagged arguments count, for new.target.
+    __ sub(ecx, Immediate(1));
+    __ mov(eax, ecx);
+    __ lea(edx, Operand(edx, ecx, times_pointer_size,
+                        StandardFrameConstants::kCallerSPOffset));
+    Label loop;
+    __ bind(&loop);
+    __ push(Operand(edx, -1 * kPointerSize));
+    __ sub(edx, Immediate(kPointerSize));
+    __ dec(ecx);
+    __ j(not_zero, &loop);
+  }
+
+  __ bind(&args_set_up);
+  __ mov(edi, Operand(esp, eax, times_pointer_size, 0));
+
+  CallConstructStub stub(isolate(), SUPER_CONSTRUCTOR_CALL);
+  __ call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
+
+  __ Drop(1);
+
+  context()->Plug(eax);
+}
+
+
 void FullCodeGenerator::EmitRegExpConstructResult(CallRuntime* expr) {
   // Load the arguments on the stack and call the stub.
   RegExpConstructResultStub stub(isolate());