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

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
===================================================================
--- src/x64/lithium-x64.cc	(revision 7281)
+++ src/x64/lithium-x64.cc	(working copy)
@@ -1990,6 +1990,13 @@
 }
 
 
+LInstruction* LChunkBuilder::DoToFastProperties(HToFastProperties* instr) {
+  LOperand* object = UseFixed(instr->value(), rax);
+  LToFastProperties* result = new LToFastProperties(object);
+  return MarkAsCall(DefineFixed(result, rax), instr);
+}
+
+
 LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
   LTypeof* result = new LTypeof(UseAtStart(instr->value()));
   return MarkAsCall(DefineFixed(result, rax), instr);