Use a filter instead of a visitor to deoptimize selected functions in a context.

src/arm/deoptimizer-arm.cc

 // Copyright 2012 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 26 matching lines @@
 
 const int Deoptimizer::table_entry_size_ = 16;
 
 
 int Deoptimizer::patch_size() {
   const int kCallInstructionSizeInWords = 3;
   return kCallInstructionSizeInWords * Assembler::kInstrSize;
 }
 
 
-void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
-  HandleScope scope;
+void Deoptimizer::DeoptimizeFunctionWithPreparedFunctionList(
+    JSFunction* function) {
+  Isolate* isolate = function->GetIsolate();

[ulan, 2012/12/12 13:50:57]

This changes are to sync code for different architectures.

+  HandleScope scope(isolate);
   AssertNoAllocation no_allocation;
 
-  if (!function->IsOptimized()) return;
+  ASSERT(function->IsOptimized());
+  ASSERT(function->FunctionsInFunctionListShareSameCode());
 
   // The optimized code is going to be patched, so we cannot use it
   // any more.  Play safe and reset the whole cache.
   function->shared()->ClearOptimizedCodeMap();
 
   // Get the optimized code.
   Code* code = function->code();
   Address code_start_address = code->instruction_start();
 
   // Invalidate the relocation information, as it will become invalid by the
@@ skipping 22 matching lines @@
     CodePatcher patcher(call_address, call_size_in_words);
     patcher.masm()->Call(deopt_entry, RelocInfo::NONE);
     ASSERT(prev_call_address == NULL ||
            call_address >= prev_call_address + patch_size());
     ASSERT(call_address + patch_size() <= code->instruction_end());
 #ifdef DEBUG
     prev_call_address = call_address;
 #endif
   }
 
-  Isolate* isolate = code->GetIsolate();
-
   // Add the deoptimizing code to the list.
   DeoptimizingCodeListNode* node = new DeoptimizingCodeListNode(code);
   DeoptimizerData* data = isolate->deoptimizer_data();
   node->set_next(data->deoptimizing_code_list_);
   data->deoptimizing_code_list_ = node;
 
   // We might be in the middle of incremental marking with compaction.
   // Tell collector to treat this code object in a special way and
   // ignore all slots that might have been recorded on it.
   isolate->heap()->mark_compact_collector()->InvalidateCode(code);
@@ skipping 994 matching lines @@
     __ push(ip);
     __ b(&done);
     ASSERT(masm()->pc_offset() - start == table_entry_size_);
   }
   __ bind(&done);
 }
 
 #undef __
 
 } }  // namespace v8::internal