Use off-heap data for class check instructions

runtime/vm/jit_optimizer.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_JIT_OPTIMIZER_H_
 #define RUNTIME_VM_JIT_OPTIMIZER_H_
 
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph.h"
 
@@ skipping 56 matching lines @@
   bool TypeCheckAsClassEquality(const AbstractType& type);
   void ReplaceWithTypeCast(InstanceCallInstr* instr);
 
   bool TryReplaceInstanceCallWithInline(InstanceCallInstr* call);
 
   // Insert a check of 'to_check' determined by 'unary_checks'.  If the
   // check fails it will deoptimize to 'deopt_id' using the deoptimization
   // environment 'deopt_environment'.  The check is inserted immediately
   // before 'insert_before'.
   void AddCheckClass(Definition* to_check,
-                     const ICData& unary_checks,
+                     const Cids& cids,
                      intptr_t deopt_id,
                      Environment* deopt_environment,
                      Instruction* insert_before);
-  Instruction* GetCheckClass(Definition* to_check,
-                             const ICData& unary_checks,
-                             intptr_t deopt_id,
-                             TokenPosition token_pos);
 
   // Insert a Smi check if needed.
   void AddCheckSmi(Definition* to_check,
                    intptr_t deopt_id,
                    Environment* deopt_environment,
                    Instruction* insert_before);
 
-  // Add a class check for a call's first argument immediately before the
+  // Add a class check for a call's nth argument immediately before the
   // call, using the call's IC data to determine the check, and the call's
   // deopt ID and deoptimization environment if the check fails.
-  void AddReceiverCheck(InstanceCallInstr* call);
+  void AddChecksToArgNr(InstanceCallInstr* call,
+                        Definition* instr,
+                        int argument_number);
+
+  // Add a class check for the call's first argument (receiver).
+  void AddReceiverCheck(InstanceCallInstr* call) {
+    AddChecksToArgNr(call, call->ArgumentAt(0), /* argument_number = */ 0);
+  }
 
   void ReplaceCall(Definition* call, Definition* replacement);
 
 
   bool InstanceCallNeedsClassCheck(InstanceCallInstr* call,
                                    RawFunction::Kind kind) const;
 
   bool InlineFloat32x4BinaryOp(InstanceCallInstr* call, Token::Kind op_kind);
   bool InlineInt32x4BinaryOp(InstanceCallInstr* call, Token::Kind op_kind);
   bool InlineFloat64x2BinaryOp(InstanceCallInstr* call, Token::Kind op_kind);
@@ skipping 18 matching lines @@
 
   FlowGraph* flow_graph_;
 
   DISALLOW_COPY_AND_ASSIGN(JitOptimizer);
 };
 
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_JIT_OPTIMIZER_H_