Fix compilation with GCC-4.8 after r24685

src/compiler/node-matchers.h

 // Copyright 2014 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_NODE_MATCHERS_H_
 #define V8_COMPILER_NODE_MATCHERS_H_
 
 #include "src/compiler/node.h"
 #include "src/compiler/operator.h"
 #include "src/unique.h"
@@ skipping 97 matching lines @@
         has_value_ = true;
         value_ = OpParameter<float>(node);
         break;
       case IrOpcode::kFloat64Constant:
       case IrOpcode::kNumberConstant:
         has_value_ = true;
         value_ = OpParameter<double>(node);
         break;
       default:
         has_value_ = false;
+        value_ = 0;  // Make the compiler happy.
         break;
     }
   }
 
   bool HasValue() const { return has_value_; }
   double Value() const {
     DCHECK(HasValue());
     return value_;
   }
 
@@ skipping 127 matching lines @@
   int power_;
   int displacement_;
 };
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_MATCHERS_H_