Lazy deoptimization for comparisons in Turbofan.

src/compiler/linkage-impl.h

Index: src/compiler/linkage-impl.h
diff --git a/src/compiler/linkage-impl.h b/src/compiler/linkage-impl.h
index 88cf125540fae3101b5388e26f904966ced4f3fd..c4a8007bb8a3820608bcd84e8fc2e667e72b3d02 100644
--- a/src/compiler/linkage-impl.h
+++ b/src/compiler/linkage-impl.h
@@ -71,7 +71,7 @@ class LinkageHelper {
   template <typename LinkageTraits>
   static CallDescriptor* GetRuntimeCallDescriptor(
       Zone* zone, Runtime::FunctionId function_id, int parameter_count,
-      Operator::Property properties, CallDescriptor::Flags flags) {
+      Operator::Property properties) {
     const int code_count = 1;
     const int function_count = 1;
     const int num_args_count = 1;
@@ -109,6 +109,10 @@ class LinkageHelper {
         WordRegisterLocation(LinkageTraits::RuntimeCallArgCountReg());
     locations[index++] = TaggedRegisterLocation(LinkageTraits::ContextReg());
 
+    CallDescriptor::Flags flags = Linkage::NeedsFrameState(function_id)
+                                      ? CallDescriptor::kNeedsFrameState
+                                      : CallDescriptor::kNoFlags;
+
     // TODO(titzer): refactor TurboFan graph to consider context a value input.
     return new (zone) CallDescriptor(CallDescriptor::kCallCodeObject,  // kind
                                      return_count,     // return_count
@@ -196,6 +200,25 @@ class LinkageHelper {
   }
 };
 
+
+bool Linkage::NeedsFrameState(Runtime::FunctionId function) {
+  if (!FLAG_turbo_deoptimization) {
+    return false;
+  }
+  // TODO(jarin) At the moment, we only add frame state for
+  // few chosen runtime functions.
+  switch (function) {
+    case Runtime::kDebugBreak:
+    case Runtime::kDeoptimizeFunction:
+    case Runtime::kSetScriptBreakPoint:
+    case Runtime::kDebugGetLoadedScripts:
+    case Runtime::kStackGuard:
+      return true;
+    default:
+      return false;
+  }
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8