new classes: implement correct check for uninitialized this in 'super()'

src/arm64/full-codegen-arm64.cc

Index: src/arm64/full-codegen-arm64.cc
diff --git a/src/arm64/full-codegen-arm64.cc b/src/arm64/full-codegen-arm64.cc
index c1615c985c5e382dd844b3f1eb5b5139dc8e7bbd..169c3040d3638c6120af49af7caa49b1e066c22e 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -2960,16 +2960,6 @@ void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
   EmitLoadSuperConstructor();
   __ push(result_register());
 
-  Variable* this_var = super_ref->this_var()->var();
-
-  GetVar(x0, this_var);
-  Label uninitialized_this;
-  __ JumpIfRoot(x0, Heap::kTheHoleValueRootIndex, &uninitialized_this);
-  __ Mov(x0, Operand(this_var->name()));
-  __ Push(x0);
-  __ CallRuntime(Runtime::kThrowReferenceError, 1);
-  __ bind(&uninitialized_this);
-
   // Push the arguments ("left-to-right") on the stack.
   ZoneList<Expression*>* args = expr->arguments();
   int arg_count = args->length();
@@ -3005,6 +2995,15 @@ void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
 
   RecordJSReturnSite(expr);
 
+  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);
   context()->Plug(x0);
 }