This is a little experiment to move Failure to a superclass above Object...

src/arm/stub-cache-arm.cc

 // Copyright 2006-2009 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 820 matching lines @@
 };
 
 
 // Generate code to check that a global property cell is empty. Create
 // the property cell at compilation time if no cell exists for the
 // property.
 static Object* GenerateCheckPropertyCell(MacroAssembler* masm,
                                          GlobalObject* global,
                                          String* name,
                                          Register scratch,
+  Object* probe;
+  { TryAllocation t = global->EnsurePropertyCell(name);
+    if (!t->ToObject(&probe)) return t;
+  }
                                          Label* miss) {
-  Object* probe = global->EnsurePropertyCell(name);
-  if (probe->IsFailure()) return probe;
   JSGlobalPropertyCell* cell = JSGlobalPropertyCell::cast(probe);
   ASSERT(cell->value()->IsTheHole());
   __ mov(scratch, Operand(Handle<Object>(cell)));
   __ ldr(scratch,
          FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset));
   __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
   __ cmp(scratch, ip);
   __ b(ne, miss);
   return cell;
 }
@@ skipping 420 matching lines @@
     __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
     __ cmp(r4, r3);
     __ b(ne, miss);
   } else {
     __ cmp(r1, Operand(Handle<JSFunction>(function)));
     __ b(ne, miss);
   }
 }
 
 
+  Object* obj;
+  { TryAllocation t =
+        StubCache::ComputeCallMiss(arguments().immediate(), kind_);
+    if (!t->ToObject(&obj)) return t;
+  }
 Object* CallStubCompiler::GenerateMissBranch() {
-  Object* obj = StubCache::ComputeCallMiss(arguments().immediate(), kind_);
-  if (obj->IsFailure()) return obj;
   __ Jump(Handle<Code>(Code::cast(obj)), RelocInfo::CODE_TARGET);
   return obj;
 }
 
 
 Object* CallStubCompiler::CompileCallField(JSObject* object,
                                            JSObject* holder,
                                            int index,
                                            String* name) {
   // ----------- S t a t e -------------
@@ skipping 12 matching lines @@
   __ tst(r0, Operand(kSmiTagMask));
   __ b(eq, &miss);
 
   // Do the right check and compute the holder register.
   Register reg = CheckPrototypes(object, r0, holder, r1, r3, r4, name, &miss);
   GenerateFastPropertyLoad(masm(), r1, reg, holder, index);
 
   GenerateCallFunction(masm(), object, arguments(), &miss);
 
   // Handle call cache miss.
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   __ bind(&miss);
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return GetCode(FIELD, name);
 }
 
 
 Object* CallStubCompiler::CompileArrayPushCall(Object* object,
                                                JSObject* holder,
                                                JSGlobalPropertyCell* cell,
                                                JSFunction* function,
@@ skipping 21 matching lines @@
   __ b(eq, &miss);
 
   // Check that the maps haven't changed.
   CheckPrototypes(JSObject::cast(object), r1, holder, r3, r0, r4, name, &miss);
 
   __ TailCallExternalReference(ExternalReference(Builtins::c_ArrayPush),
                                argc + 1,
                                1);
 
   // Handle call cache miss.
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   __ bind(&miss);
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return GetCode(function);
 }
 
 
 Object* CallStubCompiler::CompileArrayPopCall(Object* object,
                                               JSObject* holder,
                                               JSGlobalPropertyCell* cell,
                                               JSFunction* function,
@@ skipping 21 matching lines @@
   __ b(eq, &miss);
 
   // Check that the maps haven't changed.
   CheckPrototypes(JSObject::cast(object), r1, holder, r3, r0, r4, name, &miss);
 
   __ TailCallExternalReference(ExternalReference(Builtins::c_ArrayPop),
                                argc + 1,
                                1);
 
   // Handle call cache miss.
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   __ bind(&miss);
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return GetCode(function);
 }
 
 
 Object* CallStubCompiler::CompileStringCharCodeAtCall(
     Object* object,
     JSObject* holder,
     JSGlobalPropertyCell* cell,
@@ skipping 49 matching lines @@
   __ Ret();
 
   ICRuntimeCallHelper call_helper;
   char_code_at_generator.GenerateSlow(masm(), call_helper);
 
   __ bind(&index_out_of_range);
   __ LoadRoot(r0, Heap::kNanValueRootIndex);
   __ Drop(argc + 1);
   __ Ret();
 
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   __ bind(&miss);
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return GetCode(function);
 }
 
 
 Object* CallStubCompiler::CompileStringCharAtCall(Object* object,
                                                   JSObject* holder,
                                                   JSGlobalPropertyCell* cell,
                                                   JSFunction* function,
@@ skipping 51 matching lines @@
   __ Ret();
 
   ICRuntimeCallHelper call_helper;
   char_at_generator.GenerateSlow(masm(), call_helper);
 
   __ bind(&index_out_of_range);
   __ LoadRoot(r0, Heap::kEmptyStringRootIndex);
   __ Drop(argc + 1);
   __ Ret();
 
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   __ bind(&miss);
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return GetCode(function);
 }
 
 
 Object* CallStubCompiler::CompileStringFromCharCodeCall(
     Object* object,
     JSObject* holder,
     JSGlobalPropertyCell* cell,
@@ skipping 51 matching lines @@
 
   ICRuntimeCallHelper call_helper;
   char_from_code_generator.GenerateSlow(masm(), call_helper);
 
   // Tail call the full function. We do not have to patch the receiver
   // because the function makes no use of it.
   __ bind(&slow);
   __ InvokeFunction(function, arguments(), JUMP_FUNCTION);
 
   __ bind(&miss);
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   // r2: function name.
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return (cell == NULL) ? GetCode(function) : GetCode(NORMAL, name);
 }
 
 
 Object* CallStubCompiler::CompileMathFloorCall(Object* object,
                                                JSObject* holder,
                                                JSGlobalPropertyCell* cell,
                                                JSFunction* function,
@@ skipping 89 matching lines @@
   __ str(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset));
   __ Drop(argc + 1);
   __ Ret();
 
   // Tail call the full function. We do not have to patch the receiver
   // because the function makes no use of it.
   __ bind(&slow);
   __ InvokeFunction(function, arguments(), JUMP_FUNCTION);
 
   __ bind(&miss);
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   // r2: function name.
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return (cell == NULL) ? GetCode(function) : GetCode(NORMAL, name);
 }
 
 
 Object* CallStubCompiler::CompileCallConstant(Object* object,
                                               JSObject* holder,
                                               JSFunction* function,
                                               String* name,
@@ skipping 131 matching lines @@
   } else {
     __ InvokeFunction(function, arguments(), JUMP_FUNCTION);
   }
 
   // Handle call cache miss.
   __ bind(&miss);
   if (depth != kInvalidProtoDepth) {
     FreeSpaceForFastApiCall(masm());
   }
 
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   __ bind(&miss_in_smi_check);
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return GetCode(function);
 }
 
 
 Object* CallStubCompiler::CompileCallInterceptor(JSObject* object,
                                                  JSObject* holder,
                                                  String* name) {
   // ----------- S t a t e -------------
@@ skipping 27 matching lines @@
                    &miss);
 
   // Move returned value, the function to call, to r1.
   __ mov(r1, r0);
   // Restore receiver.
   __ ldr(r0, MemOperand(sp, argc * kPointerSize));
 
   GenerateCallFunction(masm(), object, arguments(), &miss);
 
   // Handle call cache miss.
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   __ bind(&miss);
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return GetCode(INTERCEPTOR, name);
 }
 
 
 Object* CallStubCompiler::CompileCallGlobal(JSObject* object,
                                             GlobalObject* holder,
                                             JSGlobalPropertyCell* cell,
                                             JSFunction* function,
@@ skipping 36 matching lines @@
   // Jump to the cached code (tail call).
   __ IncrementCounter(&Counters::call_global_inline, 1, r3, r4);
   ASSERT(function->is_compiled());
   Handle<Code> code(function->code());
   ParameterCount expected(function->shared()->formal_parameter_count());
   __ InvokeCode(code, expected, arguments(),
                 RelocInfo::CODE_TARGET, JUMP_FUNCTION);
 
   // Handle call cache miss.
   __ bind(&miss);
+  Object* obj;
+  { TryAllocation t = GenerateMissBranch();
+    if (!t->ToObject(&obj)) return t;
+  }
   __ IncrementCounter(&Counters::call_global_inline_miss, 1, r1, r3);
-  Object* obj = GenerateMissBranch();
-  if (obj->IsFailure()) return obj;
 
   // Return the generated code.
   return GetCode(NORMAL, name);
 }
 
 
 Object* StoreStubCompiler::CompileStoreField(JSObject* object,
                                              int index,
                                              Map* transition,
                                              String* name) {
@@ skipping 679 matching lines @@
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM