[turbofan] Unwind and jump to the catch handler in the deoptimizer.

src/compiler/liveness-analyzer.h

 // 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.
 
 #ifndef V8_COMPILER_LIVENESS_ANAYZER_H_
 #define V8_COMPILER_LIVENESS_ANAYZER_H_
 
 #include "src/bit-vector.h"
 #include "src/compiler/node.h"
 #include "src/zone-containers.h"
@@ skipping 67 matching lines @@
 
 
 class LivenessAnalyzerBlock {
  public:
   friend class LivenessAnalyzer;
 
   void Lookup(int var) { entries_.push_back(Entry(Entry::kLookup, var)); }
   void Bind(int var) { entries_.push_back(Entry(Entry::kBind, var)); }
   void Checkpoint(Node* node) { entries_.push_back(Entry(node)); }
   void AddPredecessor(LivenessAnalyzerBlock* b) { predecessors_.push_back(b); }
+  LivenessAnalyzerBlock* GetPredecessor() {
+    DCHECK(predecessors_.size() == 1);
+    return predecessors_[0];
+  }
 
  private:
   class Entry {
    public:
     enum Kind { kBind, kLookup, kCheckpoint };
 
     Kind kind() const { return kind_; }
     Node* node() const {
       DCHECK(kind() == kCheckpoint);
       return node_;
@@ skipping 39 matching lines @@
 
   size_t id_;
 };
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_