MIPS64: [es6] implement spread calls

Port 74c38122

Patch from Paul Lind <paul.lind@imgtec.com>.

BUG=

Review URL: https://codereview.chromium.org/1075183002

Cr-Commit-Position: refs/heads/master@{#27740}

src/mips64/full-codegen-mips64.cc

@@ -3090,6 +3090,22 @@ void FullCodeGenerator::EmitLoadSuperConstructor() {
 }
 
 
+void FullCodeGenerator::EmitInitializeThisAfterSuper(
+    SuperReference* super_ref) {
+  Variable* this_var = super_ref->this_var()->var();
+  GetVar(a1, this_var);
+  __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
+  Label uninitialized_this;
+  __ Branch(&uninitialized_this, eq, a1, Operand(at));
+  __ li(a0, Operand(this_var->name()));
+  __ Push(a0);
+  __ CallRuntime(Runtime::kThrowReferenceError, 1);
+  __ bind(&uninitialized_this);
+
+  EmitVariableAssignment(this_var, Token::INIT_CONST);
+}
+
+
 void FullCodeGenerator::VisitCall(Call* expr) {
 #ifdef DEBUG
   // We want to verify that RecordJSReturnSite gets called on all paths
@@ -3311,18 +3327,7 @@ void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
 
   RecordJSReturnSite(expr);
 
-  SuperReference* super_ref = expr->expression()->AsSuperReference();
-  Variable* this_var = super_ref->this_var()->var();
-  GetVar(a1, this_var);
-  __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
-  Label uninitialized_this;
-  __ Branch(&uninitialized_this, eq, a1, Operand(at));
-  __ li(a0, Operand(this_var->name()));
-  __ Push(a0);
-  __ CallRuntime(Runtime::kThrowReferenceError, 1);
-  __ bind(&uninitialized_this);
-
-  EmitVariableAssignment(this_var, Token::INIT_CONST);
+  EmitInitializeThisAfterSuper(expr->expression()->AsSuperReference());
   context()->Plug(v0);
 }
 
@@ -4614,12 +4619,44 @@ void FullCodeGenerator::EmitDebugIsActive(CallRuntime* expr) {
 }
 
 
-void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
-  ZoneList<Expression*>* args = expr->arguments();
-  int arg_count = args->length();
+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());
 
-  if (expr->is_jsruntime()) {
-    Comment cmnt(masm_, "[ CallRuntime");
+  SuperReference* super_reference = args->at(0)->AsSuperReference();
+
+  // Load ReflectConstruct function
+  EmitLoadJSRuntimeFunction(call);
+
+  // Push the target function under the receiver.
+  __ ld(at, MemOperand(sp, 0));
+  __ push(at);
+  __ sd(v0, MemOperand(sp, kPointerSize));
+
+  // Push super
+  EmitLoadSuperConstructor();
+  __ 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.
+  __ ld(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
+  context()->DropAndPlug(1, v0);
+
+  EmitInitializeThisAfterSuper(super_reference);
+}
+
+
+void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) {
   // Push the builtins object as the receiver.
   Register receiver = LoadDescriptor::ReceiverRegister();
   __ ld(receiver, GlobalObjectOperand());
@@ -4635,6 +4672,28 @@ void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
   } else {
     CallLoadIC(NOT_CONTEXTUAL, expr->CallRuntimeFeedbackId());
   }
+}
+
+
+void FullCodeGenerator::EmitCallJSRuntimeFunction(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  int arg_count = args->length();
+
+  // Record source position of the IC call.
+  SetSourcePosition(expr->position());
+  CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
+  __ ld(a1, MemOperand(sp, (arg_count + 1) * kPointerSize));
+  __ CallStub(&stub);
+}
+
+
+void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  int arg_count = args->length();
+
+  if (expr->is_jsruntime()) {
+    Comment cmnt(masm_, "[ CallRuntime");
+    EmitLoadJSRuntimeFunction(expr);
 
     // Push the target function under the receiver.
     __ ld(at, MemOperand(sp, 0));
@@ -4646,11 +4705,7 @@ void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
       VisitForStackValue(args->at(i));
     }
 
-    // Record source position of the IC call.
-    SetSourcePosition(expr->position());
-    CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
-    __ ld(a1, MemOperand(sp, (arg_count + 1) * kPointerSize));
-    __ CallStub(&stub);
+    EmitCallJSRuntimeFunction(expr);
 
     // Restore context register.
     __ ld(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));