Re-optimize faster after making a pretenuring decision.

src/compiler.cc

 // Copyright 2012 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.
 
 #include "v8.h"
 
 #include "compiler.h"
 
 #include "bootstrapper.h"
 #include "codegen.h"
@@ skipping 1254 matching lines @@
         log_tag, *code, *shared, info, script_name, line_num, column_num));
   }
 
   GDBJIT(AddCode(Handle<String>(shared->DebugName()),
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code()),
                  info));
 }
 
 
+void Compiler::Optimize(JSFunction* function, const char* reason) {
+  ASSERT(function->IsOptimizable());
+
+  if (FLAG_trace_opt && function->PassesFilter(FLAG_hydrogen_filter)) {
+    PrintF("[marking ");
+    function->ShortPrint();
+    PrintF(" for recompilation, reason: %s", reason);
+    if (FLAG_type_info_threshold > 0) {
+      int typeinfo, total, percentage;
+      Code* code = function->shared()->code();
+      code->GetICCounts(&typeinfo, &total, &percentage);
+      PrintF(", ICs with typeinfo: %d/%d (%d%%)", typeinfo, total, percentage);
+    }
+    PrintF("]\n");
+  }
+
+  Isolate* isolate = function->GetIsolate();
+
+  if (isolate->concurrent_recompilation_enabled() &&
+      !isolate->bootstrapper()->IsActive()) {
+    if (isolate->concurrent_osr_enabled() &&
+        isolate->optimizing_compiler_thread()->IsQueuedForOSR(function)) {
+      // Do not attempt regular recompilation if we already queued this for OSR.
+      // TODO(yangguo): This is necessary so that we don't install optimized
+      // code on a function that is already optimized, since OSR and regular
+      // recompilation race.  This goes away as soon as OSR becomes one-shot.
+      return;
+    }
+    ASSERT(!function->IsInOptimizationQueue());
+    function->MarkForConcurrentOptimization();
+  } else {
+    // The next call to the function will trigger optimization.
+    function->MarkForOptimization();
+  }
+}
+
+
 CompilationPhase::CompilationPhase(const char* name, CompilationInfo* info)
     : name_(name), info_(info), zone_(info->isolate()) {
   if (FLAG_hydrogen_stats) {
     info_zone_start_allocation_size_ = info->zone()->allocation_size();
     timer_.Start();
   }
 }
 
 
 CompilationPhase::~CompilationPhase() {
@@ skipping 11 matching lines @@
   AllowHandleDereference allow_deref;
   bool tracing_on = info()->IsStub()
       ? FLAG_trace_hydrogen_stubs
       : (FLAG_trace_hydrogen &&
          info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));
   return (tracing_on &&
       OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal