Optimize calls to object literal properties that are initialized with a funct...

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
===================================================================
--- src/x64/lithium-x64.h	(revision 7281)
+++ src/x64/lithium-x64.h	(working copy)
@@ -154,6 +154,7 @@
   V(StringLength)                               \
   V(SubI)                                       \
   V(TaggedToI)                                  \
+  V(ToFastProperties)                           \
   V(Throw)                                      \
   V(Typeof)                                     \
   V(TypeofIs)                                   \
@@ -1762,6 +1763,17 @@
 };
 
 
+class LToFastProperties: public LTemplateInstruction<1, 1, 0> {
+ public:
+  explicit LToFastProperties(LOperand* value) {
+    inputs_[0] = value;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(ToFastProperties, "to-fast-properties")
+  DECLARE_HYDROGEN_ACCESSOR(ToFastProperties)
+};
+
+
 class LTypeof: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LTypeof(LOperand* value) {