Land Kevin's patch for supporting %_CallFunction in Crankshaft.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
===================================================================
--- src/x64/lithium-x64.cc	(revision 7622)
+++ src/x64/lithium-x64.cc	(working copy)
@@ -302,6 +302,13 @@
 }
 
 
+void LInvokeFunction::PrintDataTo(StringStream* stream) {
+  stream->Add("= ");
+  InputAt(0)->PrintTo(stream);
+  stream->Add(" #%d / ", arity());
+}
+
+
 void LCallKeyed::PrintDataTo(StringStream* stream) {
   stream->Add("[rcx] #%d / ", arity());
 }
@@ -1210,6 +1217,14 @@
 }
 
 
+LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) {
+  LOperand* function = UseFixed(instr->function(), rdi);
+  argument_count_ -= instr->argument_count();
+  LInvokeFunction* result = new LInvokeFunction(function);
+  return MarkAsCall(DefineFixed(result, rax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
+}
+
+
 LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
   BuiltinFunctionId op = instr->op();
   if (op == kMathLog || op == kMathSin || op == kMathCos) {