Merge r8028 to the 3.2 branch.

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 97168cdce4615ebbe96ddd9ed1dd0c460eee885f..6933d7800e9602069cc071bdbbfca69147fa624f 100644
--- a/src/x64/full-codegen-x64.cc
+++ b/src/x64/full-codegen-x64.cc
@@ -1398,13 +1398,17 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
         // Fall through.
       case ObjectLiteral::Property::COMPUTED:
         if (key->handle()->IsSymbol()) {
-          VisitForAccumulatorValue(value);
-          __ Move(rcx, key->handle());
-          __ movq(rdx, Operand(rsp, 0));
           if (property->emit_store()) {
-            Handle<Code> ic = isolate()->builtins()->StoreIC_Initialize();
+            VisitForAccumulatorValue(value);
+            __ Move(rcx, key->handle());
+            __ movq(rdx, Operand(rsp, 0));
+            Handle<Code> ic = is_strict_mode()
+                ? isolate()->builtins()->StoreIC_Initialize_Strict()
+                : isolate()->builtins()->StoreIC_Initialize();
             EmitCallIC(ic, RelocInfo::CODE_TARGET);
             PrepareForBailoutForId(key->id(), NO_REGISTERS);
+          } else {
+            VisitForEffect(value);
           }
           break;
         }