[turbofan] Introduce lazy bailout, masked as a call.

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index 6ce9269927c645fd16b8f6b431606bcd8101f570..5b07447b62018499ebc898beeae46d152cc6cc4f 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -1410,10 +1410,13 @@ void AstGraphBuilder::VisitTryCatchStatement(TryCatchStatement* stmt) {
   }
   try_control.EndTry();
 
-  // TODO(mstarzinger): We are only using a runtime call to get a lazy bailout
-  // point, there is no need to really emit an actual call. Optimize this!
-  Node* guard = NewNode(javascript()->CallRuntime(Runtime::kMaxSmi, 0));
-  PrepareFrameState(guard, stmt->HandlerId());
+  // Insert lazy bailout point.
+  // TODO(mstarzinger): We are only using a 'call' to get a lazy bailout
+  // point. Ideally, we whould not re-enter optimized code when deoptimized
+  // lazily. Tracked by issue v8:4195.
+  NewNode(common()->LazyBailout(),
+          jsgraph()->ZeroConstant(),                      // dummy target.
+          environment()->Checkpoint(stmt->HandlerId()));  // frame state.
 
   // Clear message object as we enter the catch block.
   Node* the_hole = jsgraph()->TheHoleConstant();
@@ -1461,10 +1464,13 @@ void AstGraphBuilder::VisitTryFinallyStatement(TryFinallyStatement* stmt) {
   }
   try_control.EndTry(commands->GetFallThroughToken(), fallthrough_result);
 
-  // TODO(mstarzinger): We are only using a runtime call to get a lazy bailout
-  // point, there is no need to really emit an actual call. Optimize this!
-  Node* guard = NewNode(javascript()->CallRuntime(Runtime::kMaxSmi, 0));
-  PrepareFrameState(guard, stmt->HandlerId());
+  // Insert lazy bailout point.
+  // TODO(mstarzinger): We are only using a 'call' to get a lazy bailout
+  // point. Ideally, we whould not re-enter optimized code when deoptimized
+  // lazily. Tracked by issue v8:4195.
+  NewNode(common()->LazyBailout(),
+          jsgraph()->ZeroConstant(),                      // dummy target.
+          environment()->Checkpoint(stmt->HandlerId()));  // frame state.
 
   // The result value semantics depend on how the block was entered:
   //  - ReturnStatement: It represents the return value being returned.