[crankshaft] Remove useless HCallJSFunction instruction.

src/crankshaft/x64/lithium-codegen-x64.cc

Index: src/crankshaft/x64/lithium-codegen-x64.cc
diff --git a/src/crankshaft/x64/lithium-codegen-x64.cc b/src/crankshaft/x64/lithium-codegen-x64.cc
index 4f44c084ba3ee645d839aa7e2bfc7a2412d7a704..20a2fffece04e57ed26ec39ccaea454ebd8e8e7c 100644
--- a/src/crankshaft/x64/lithium-codegen-x64.cc
+++ b/src/crankshaft/x64/lithium-codegen-x64.cc
@@ -3263,39 +3263,6 @@ void LCodeGen::DoCallWithDescriptor(LCallWithDescriptor* instr) {
 }
 
 
-void LCodeGen::DoCallJSFunction(LCallJSFunction* instr) {
-  DCHECK(ToRegister(instr->function()).is(rdi));
-  DCHECK(ToRegister(instr->result()).is(rax));
-
-  // Change context.
-  __ movp(rsi, FieldOperand(rdi, JSFunction::kContextOffset));
-
-  // Always initialize new target and number of actual arguments.
-  __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex);
-  __ Set(rax, instr->arity());
-
-  LPointerMap* pointers = instr->pointer_map();
-  SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
-
-  bool is_self_call = false;
-  if (instr->hydrogen()->function()->IsConstant()) {
-    Handle<JSFunction> jsfun = Handle<JSFunction>::null();
-    HConstant* fun_const = HConstant::cast(instr->hydrogen()->function());
-    jsfun = Handle<JSFunction>::cast(fun_const->handle(isolate()));
-    is_self_call = jsfun.is_identical_to(info()->closure());
-  }
-
-  if (is_self_call) {
-    __ CallSelf();
-  } else {
-    Operand target = FieldOperand(rdi, JSFunction::kCodeEntryOffset);
-    generator.BeforeCall(__ CallSize(target));
-    __ Call(target);
-  }
-  generator.AfterCall();
-}
-
-
 void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) {
   Register input_reg = ToRegister(instr->value());
   __ CompareRoot(FieldOperand(input_reg, HeapObject::kMapOffset),