[turbofan] Make escape analysis fail silently for cyclic object states

src/compiler/escape-analysis-reducer.cc

 // Copyright 2015 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.
 
 #include "src/compiler/escape-analysis-reducer.h"
 
 #include "src/compiler/all-nodes.h"
 #include "src/compiler/js-graph.h"
 #include "src/counters.h"
 
@@ skipping 309 matching lines @@
   }
   TRACE("Reducing State Input #%d (%s)\n", input->id(),
         input->op()->mnemonic());
   Node* clone = nullptr;
   if (input->opcode() == IrOpcode::kFinishRegion ||
       input->opcode() == IrOpcode::kAllocate) {
     if (escape_analysis()->IsVirtual(input)) {
       if (escape_analysis()->IsCyclicObjectState(effect, input)) {
         // TODO(mstarzinger): Represent cyclic object states differently to
         // ensure the scheduler can properly handle such object states.
-        FATAL("Cyclic object state detected by escape analysis.");
+        compilation_failed_ = true;
+        return nullptr;
       }
       if (Node* object_state =
               escape_analysis()->GetOrCreateObjectState(effect, input)) {
         if (node_multiused || (multiple_users && !already_cloned)) {
           TRACE("Cloning #%d", node->id());
           node = clone = jsgraph()->graph()->CloneNode(node);
           TRACE(" to #%d\n", node->id());
           node_multiused = false;
           already_cloned = true;
         }
@@ skipping 20 matching lines @@
     }
   }
 #endif  // DEBUG
 }
 
 Isolate* EscapeAnalysisReducer::isolate() const { return jsgraph_->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8