Remove environment length from HSimulate instructions.

It was only used in an ASSERT when reconstructing environments
at lithium translation time.
Review URL: http://codereview.chromium.org/6693062

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7501 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-arm.cc

@@ -2077,8 +2077,6 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
     }
   }
 
-  ASSERT(env->length() == instr->environment_length());
-
   // If there is an instruction pending deoptimization environment create a
   // lazy bailout instruction to capture the environment.
   if (pending_deoptimization_ast_id_ == instr->ast_id()) {

src/hydrogen-instructions.h

@@ -975,10 +975,9 @@ class HChange: public HUnaryOperation {
 
 class HSimulate: public HInstruction {
  public:
-  HSimulate(int ast_id, int pop_count, int environment_length)
+  HSimulate(int ast_id, int pop_count)
       : ast_id_(ast_id),
         pop_count_(pop_count),
-        environment_length_(environment_length),
         values_(2),
         assigned_indexes_(2) {}
   virtual ~HSimulate() {}
@@ -992,7 +991,6 @@ class HSimulate: public HInstruction {
     ast_id_ = id;
   }
 
-  int environment_length() const { return environment_length_; }
   int pop_count() const { return pop_count_; }
   const ZoneList<HValue*>* values() const { return &values_; }
   int GetAssignedIndexAt(int index) const {
@@ -1038,7 +1036,6 @@ class HSimulate: public HInstruction {
   }
   int ast_id_;
   int pop_count_;
-  int environment_length_;
   ZoneList<HValue*> values_;
   ZoneList<int> assigned_indexes_;
 };

src/hydrogen.cc

@@ -140,8 +140,7 @@ HSimulate* HBasicBlock::CreateSimulate(int id) {
   int push_count = environment->push_count();
   int pop_count = environment->pop_count();
 
-  int length = environment->length();
-  HSimulate* instr = new HSimulate(id, pop_count, length);
+  HSimulate* instr = new HSimulate(id, pop_count);
   for (int i = push_count - 1; i >= 0; --i) {
     instr->AddPushedValue(environment->ExpressionStackAt(i));
   }

src/ia32/lithium-ia32.cc

@@ -2134,7 +2134,6 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
       env->Push(value);
     }
   }
-  ASSERT(env->length() == instr->environment_length());
 
   // If there is an instruction pending deoptimization environment create a
   // lazy bailout instruction to capture the environment.

src/x64/lithium-x64.cc

@@ -2072,7 +2072,6 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
       env->Push(value);
     }
   }
-  ASSERT(env->length() == instr->environment_length());
 
   // If there is an instruction pending deoptimization environment create a
   // lazy bailout instruction to capture the environment.