[class] Use CreateDataProperty runtime call

StoreDataPropertyInLiteral doesn't throw (because the previous uses of
this didn't throw), but class fields can throw on defining the
property which means we can't use this. Changing to CreateDataProperty
runtime call instead.

Bug: v8:5367
Change-Id: I1ab45413b121972dd18fe2b35a0cedd8efe0e0bf
Reviewed-on: https://chromium-review.googlesource.com/757824
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49239}

src/interpreter/bytecode-generator.cc

@@ -1941,9 +1941,9 @@ void BytecodeGenerator::VisitClassLiteralProperties(ClassLiteral* expr,
 
 void BytecodeGenerator::VisitInitializeClassFieldsStatement(
     InitializeClassFieldsStatement* expr) {
-  Register constructor(builder()->Receiver());
+  RegisterList args = register_allocator()->NewRegisterList(3);
-  Register key = register_allocator()->NewRegister();
+  Register constructor = args[0], key = args[1], value = args[2];
-  Register value = register_allocator()->NewRegister();
+  builder()->MoveRegister(builder()->Receiver(), constructor);
 
   for (int i = 0; i < expr->fields()->length(); i++) {
     ClassLiteral::Property* property = expr->fields()->at(i);
@@ -1959,14 +1959,10 @@ void BytecodeGenerator::VisitInitializeClassFieldsStatement(
       BuildLoadPropertyKey(property, key);
     }
 
-    DataPropertyInLiteralFlags flags = DataPropertyInLiteralFlag::kNoFlags;
-    FeedbackSlot slot = feedback_spec()->AddStoreDataPropertyInLiteralICSlot();
-
     VisitForRegisterValue(property->value(), value);
     VisitSetHomeObject(value, constructor, property);
 
-    builder()->LoadAccumulatorWithRegister(value).StoreDataPropertyInLiteral(
+    builder()->CallRuntime(Runtime::kCreateDataProperty, args);
-        constructor, key, flags, feedback_index(slot));
   }
 }
 

test/mjsunit/harmony/public-instance-class-fields.js

@@ -46,6 +46,14 @@
   assertEquals(1, c.hasOwnProperty());
 }
 
+{
+  class C {
+    x = Object.freeze(this);
+    c = 42;
+  }
+  assertThrows(() => { new C; }, TypeError);
+}
+
 {
   class C {
     c = this;

test/mjsunit/harmony/public-static-class-fields.js

@@ -42,6 +42,15 @@
   assertEquals(undefined, c.c);
 }
 
+{
+  assertThrows(() => {
+    class C {
+      static x = Object.freeze(this);
+      static c = 42;
+    }
+  }, TypeError);
+}
+
 {
   class C {
     static c = this;