Reviewers: Mads Ager,

Description:
Consistently return failure if the stub cache cannot deliver a code object

Some functions of the stub cache returned undefined if a code stub could not be generated. However the clients of these functions only cehcks for failure. Now
all these functions return a failire object if no code stub can be made
available

Please review this at http://codereview.chromium.org/652039

SVN Base: http://v8.googlecode.com/svn/branches/bleeding_edge/

Affected files:
  M     src/stub-cache.cc


Index: src/stub-cache.cc
===================================================================
--- src/stub-cache.cc   (revision 3922)
+++ src/stub-cache.cc   (working copy)
@@ -105,7 +105,7 @@
     if (code->IsFailure()) return code;
     LOG(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
-    if (result->IsFailure()) return code;
+    if (result->IsFailure()) return result;
   }
   return Set(name, receiver->map(), Code::cast(code));
 }
@@ -124,7 +124,7 @@
     if (code->IsFailure()) return code;
     LOG(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
-    if (result->IsFailure()) return code;
+    if (result->IsFailure()) return result;
   }
   return Set(name, receiver->map(), Code::cast(code));
 }
@@ -143,7 +143,7 @@
     if (code->IsFailure()) return code;
     LOG(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
-    if (result->IsFailure()) return code;
+    if (result->IsFailure()) return result;
   }
   return Set(name, receiver->map(), Code::cast(code));
 }
@@ -160,7 +160,7 @@
     if (code->IsFailure()) return code;
     LOG(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
-    if (result->IsFailure()) return code;
+    if (result->IsFailure()) return result;
   }
   return Set(name, receiver->map(), Code::cast(code));
 }
@@ -189,7 +189,7 @@
     if (code->IsFailure()) return code;
     LOG(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
-    if (result->IsFailure()) return code;
+    if (result->IsFailure()) return result;
   }
   return Set(name, receiver->map(), Code::cast(code));
 }
@@ -351,7 +351,7 @@
     if (code->IsFailure()) return code;
     LOG(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
-    if (result->IsFailure()) return code;
+    if (result->IsFailure()) return result;
   }
   return Set(name, receiver->map(), Code::cast(code));
 }
@@ -566,7 +566,7 @@
     ASSERT_EQ(flags, Code::cast(code)->flags());
     LOG(CodeCreateEvent(Logger::CALL_IC_TAG, Code::cast(code), name));
Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
-    if (result->IsFailure()) return code;
+    if (result->IsFailure()) return result;
   }
   return Set(name, receiver->map(), Code::cast(code));
 }


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