In release, disable UNREACHABLE and make UNIMPLEMENTED and FATAL simpler.

src/checks.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 19 matching lines @@
 
 #include <string.h>
 
 #include "flags.h"
 
 extern "C" void V8_Fatal(const char* file, int line, const char* format, ...);
 void API_Fatal(const char* location, const char* format, ...);
 
 // The FATAL, UNREACHABLE and UNIMPLEMENTED macros are useful during
 // development, but they should not be relied on in the final product.
+#ifdef DEBUG
 #define FATAL(msg)                              \
   V8_Fatal(__FILE__, __LINE__, "%s", (msg))
-
+#define UNIMPLEMENTED()                         \
+  V8_Fatal(__FILE__, __LINE__, "unimplemented code")
 #define UNREACHABLE()                           \
   V8_Fatal(__FILE__, __LINE__, "unreachable code")
-
+#else
+#define FATAL(msg)                              \
+  V8_Fatal("", 0, "%s", (msg))
 #define UNIMPLEMENTED()                         \
-  V8_Fatal(__FILE__, __LINE__, "unimplemented code")
+  V8_Fatal("", 0, "unimplemented code")
+#define UNREACHABLE() ((void) 0)
+#endif
 
 
 // Used by the CHECK macro -- should not be called directly.
 static inline void CheckHelper(const char* file,
                                int line,
                                const char* source,
                                bool condition) {
   if (!condition)
     V8_Fatal(file, line, "CHECK(%s) failed", source);
 }
@@ skipping 179 matching lines @@
 #define SLOW_ASSERT(condition) ((void) 0)
 #endif
 
 
 #define ASSERT_TAG_ALIGNED(address) \
   ASSERT((reinterpret_cast<int>(address) & kHeapObjectTagMask) == 0)
 
 #define ASSERT_SIZE_TAG_ALIGNED(size) ASSERT((size & kHeapObjectTagMask) == 0)
 
 #endif  // V8_CHECKS_H_