Initial shot at deoptimizing JSCallFunction in Turbofan.

src/compiler/operator-properties-inl.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_OPERATOR_PROPERTIES_INL_H_
 #define V8_COMPILER_OPERATOR_PROPERTIES_INL_H_
 
 #include "src/v8.h"
 
+#include "src/compiler/js-operator.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator-properties.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 inline bool OperatorProperties::HasValueInput(Operator* op) {
   return OperatorProperties::GetValueInputCount(op) > 0;
 }
@@ skipping 103 matching lines @@
          opcode == IrOpcode::kPhi;
 }
 
 inline bool OperatorProperties::IsScheduleRoot(Operator* op) {
   uint8_t opcode = op->opcode();
   return opcode == IrOpcode::kEnd || opcode == IrOpcode::kEffectPhi ||
          opcode == IrOpcode::kPhi;
 }
 
 inline bool OperatorProperties::CanLazilyDeoptimize(Operator* op) {
+  // TODO(jarin) This function allows turning on lazy deoptimization
+  // incrementally. It will change as we turn on lazy deopt for
+  // more nodes.
+
+  if (!FLAG_turbo_deoptimization) {
+    return false;
+  }
+
   if (op->opcode() == IrOpcode::kCall) {
     CallOperator* call_op = reinterpret_cast<CallOperator*>(op);
     CallDescriptor* descriptor = call_op->parameter();
     return descriptor->CanLazilyDeoptimize();
   }
   if (op->opcode() == IrOpcode::kJSCallRuntime) {
     // TODO(jarin) At the moment, we only support lazy deoptimization for
     // the %DeoptimizeFunction runtime function.
     Runtime::FunctionId function =
         reinterpret_cast<Operator1<Runtime::FunctionId>*>(op)->parameter();
     return function == Runtime::kDeoptimizeFunction;
   }
+  if (op->opcode() == IrOpcode::kJSCallFunction) {
+    CallParameters p =
+        reinterpret_cast<Operator1<CallParameters>*>(op)->parameter();
+    return p.can_deoptimize == CallDescriptor::kCanDeoptimize;
+  }
   return false;
 }
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_OPERATOR_PROPERTIES_INL_H_