Add support for computed property names in object literals

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
diff --git a/src/x64/full-codegen-x64.cc b/src/x64/full-codegen-x64.cc
index 8de422608bd7bb8334351614a253b8fdd7662f7a..04b6bb727de744ca1c63df5957193a27661243ac 100644
--- a/src/x64/full-codegen-x64.cc
+++ b/src/x64/full-codegen-x64.cc
@@ -1666,11 +1666,18 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
   expr->CalculateEmitStore(zone());
 
   AccessorTable accessor_table(zone());
+  bool has_seen_computed_name = false;
   for (int i = 0; i < expr->properties()->length(); i++) {
     ObjectLiteral::Property* property = expr->properties()->at(i);
-    if (property->IsCompileTimeValue()) continue;
 
-    Literal* key = property->key();
+    if (!has_seen_computed_name && property->IsCompileTimeValue()) {
+      continue;
+    }
+    if (property->kind() == ObjectLiteral::Property::COMPUTED_NAME) {
+      has_seen_computed_name = true;
+    }
+
+    Literal* literal_key = property->key()->AsLiteral();
     Expression* value = property->value();
     if (!result_saved) {
       __ Push(rax);  // Save result on the stack
@@ -1678,25 +1685,29 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
     }
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
-        UNREACHABLE();
+        ASSERT(has_seen_computed_name);
+        // Fall through.
       case ObjectLiteral::Property::MATERIALIZED_LITERAL:
-        ASSERT(!CompileTimeValue::IsCompileTimeValue(value));
+        ASSERT(has_seen_computed_name ||
+               !CompileTimeValue::IsCompileTimeValue(value));
         // Fall through.
       case ObjectLiteral::Property::COMPUTED:
-        if (key->value()->IsInternalizedString()) {
+        if (literal_key->value()->IsInternalizedString()) {
           if (property->emit_store()) {
             VisitForAccumulatorValue(value);
-            __ Move(rcx, key->value());
+            __ Move(rcx, literal_key->value());
             __ movp(rdx, Operand(rsp, 0));
-            CallStoreIC(key->LiteralFeedbackId());
-            PrepareForBailoutForId(key->id(), NO_REGISTERS);
+            CallStoreIC(literal_key->LiteralFeedbackId());
+            PrepareForBailoutForId(literal_key->id(), NO_REGISTERS);
           } else {
             VisitForEffect(value);
           }
           break;
         }
+        // Fall through.
+      case ObjectLiteral::Property::COMPUTED_NAME:
         __ Push(Operand(rsp, 0));  // Duplicate receiver.
-        VisitForStackValue(key);
+        VisitForStackValue(property->key());
         VisitForStackValue(value);
         if (property->emit_store()) {
           __ Push(Smi::FromInt(NONE));    // PropertyAttributes
@@ -1715,10 +1726,10 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
         }
         break;
       case ObjectLiteral::Property::GETTER:
-        accessor_table.lookup(key)->second->getter = value;
+        accessor_table.lookup(literal_key)->second->getter = value;
         break;
       case ObjectLiteral::Property::SETTER:
-        accessor_table.lookup(key)->second->setter = value;
+        accessor_table.lookup(literal_key)->second->setter = value;
         break;
     }
   }