MaterializedLiteral expressions need to cache expression depth.

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 9d93aafb9d6aed3b8148de70d9ddae680b0f899f..944a5e7cd0b4f85290ceb408286f77e0f2065832 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -1645,8 +1645,7 @@ void FullCodeGenerator::EmitAccessor(Expression* expression) {
 void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
   Comment cmnt(masm_, "[ ObjectLiteral");
 
-  int depth = 1;
-  expr->BuildConstantProperties(isolate(), &depth);
+  expr->BuildConstantProperties(isolate());
   Handle<FixedArray> constant_properties = expr->constant_properties();
   __ lw(a3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
   __ lw(a3, FieldMemOperand(a3, JSFunction::kLiteralsOffset));
@@ -1661,7 +1660,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
   __ li(a0, Operand(Smi::FromInt(flags)));
   int properties_count = constant_properties->length() / 2;
   if ((FLAG_track_double_fields && expr->may_store_doubles()) ||
-      depth > 1 || Serializer::enabled() ||
+      expr->depth() > 1 || Serializer::enabled() ||
       flags != ObjectLiteral::kFastElements ||
       properties_count > FastCloneShallowObjectStub::kMaximumClonedProperties) {
     __ Push(a3, a2, a1, a0);
@@ -1780,8 +1779,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
 void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   Comment cmnt(masm_, "[ ArrayLiteral");
 
-  int depth = 1;
-  expr->BuildConstantElements(isolate(), &depth);
+  expr->BuildConstantElements(isolate());
   ZoneList<Expression*>* subexprs = expr->values();
   int length = subexprs->length();
 
@@ -1808,7 +1806,7 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
     __ CallStub(&stub);
     __ IncrementCounter(isolate()->counters()->cow_arrays_created_stub(),
         1, a1, a2);
-  } else if (depth > 1 || Serializer::enabled() ||
+  } else if (expr->depth() > 1 || Serializer::enabled() ||
              length > FastCloneShallowArrayStub::kMaximumClonedLength) {
     __ Push(a3, a2, a1);
     __ CallRuntime(Runtime::kCreateArrayLiteral, 3);