Fix use of uninitialized memory in debug assert.

runtime/vm/intermediate_language.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 VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 2266 matching lines @@
 };
 
 
 class EqualityCompareInstr : public ComparisonInstr {
  public:
   EqualityCompareInstr(intptr_t token_pos,
                        Token::Kind kind,
                        Value* left,
                        Value* right)
       : ComparisonInstr(kind, left, right),
-        ic_data_(Isolate::Current()->GetICDataForDeoptId(deopt_id())),
         token_pos_(token_pos),
         receiver_class_id_(kIllegalCid) {
+    // deopt_id() checks receiver_class_id_ value.
+    ic_data_ = Isolate::Current()->GetICDataForDeoptId(deopt_id());
     ASSERT((kind == Token::kEQ) || (kind == Token::kNE));
   }
 
   DECLARE_INSTRUCTION(EqualityCompare)
   virtual RawAbstractType* CompileType() const;
 
   const ICData* ic_data() const { return ic_data_; }
   bool HasICData() const {
     return (ic_data() != NULL) && !ic_data()->IsNull();
   }
@@ skipping 44 matching lines @@
 };
 
 
 class RelationalOpInstr : public ComparisonInstr {
  public:
   RelationalOpInstr(intptr_t token_pos,
                     Token::Kind kind,
                     Value* left,
                     Value* right)
       : ComparisonInstr(kind, left, right),
-        ic_data_(Isolate::Current()->GetICDataForDeoptId(deopt_id())),
         token_pos_(token_pos),
         operands_class_id_(kIllegalCid) {
+    // deopt_id() checks operands_class_id_ value.
+    ic_data_ = Isolate::Current()->GetICDataForDeoptId(deopt_id());
     ASSERT(Token::IsRelationalOperator(kind));
   }
 
   DECLARE_INSTRUCTION(RelationalOp)
   virtual RawAbstractType* CompileType() const;
 
   const ICData* ic_data() const { return ic_data_; }
   bool HasICData() const {
     return (ic_data() != NULL) && !ic_data()->IsNull();
   }
@@ skipping 2027 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_