Don't emit code for instructions that are hiding behind an HSoftDeoptimize

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 0837bf9634e33cc088a7a8dea90e479161c65902..2b8513a4e2b90275964bfc5d6b5e84f3cb846987 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -377,6 +377,7 @@ class HGraph: public ZoneObject {
                               int32_t integer_value);
 
   void MarkAsDeoptimizingRecursively(HBasicBlock* block);
+  void NullifyUnreachableInstructions();
   void InsertTypeConversions(HInstruction* instr);
   void PropagateMinusZeroChecks(HValue* value, BitVector* visited);
   void RecursivelyMarkPhiDeoptimizeOnUndefined(HPhi* phi);
@@ -956,6 +957,8 @@ class HOptimizedGraphBuilder: public HGraphBuilder, public AstVisitor {
 
   bool inline_bailout() { return inline_bailout_; }
 
+  void AddSoftDeoptimize();
+
   // Bailout environment manipulation.
   void Push(HValue* value) { environment()->Push(value); }
   HValue* Pop() { return environment()->Pop(); }