Type Feedback Vector lives in the closure

src/runtime-profiler.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 "src/runtime-profiler.h"
 
 #include "src/assembler.h"
 #include "src/ast/scopeinfo.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 35 matching lines @@
 // the very first time it is seen on the stack.
 static const int kMaxSizeEarlyOpt =
     5 * FullCodeGenerator::kCodeSizeMultiplier;
 
 
 RuntimeProfiler::RuntimeProfiler(Isolate* isolate)
     : isolate_(isolate),
       any_ic_changed_(false) {
 }
 
-
-static void GetICCounts(SharedFunctionInfo* shared,
-                        int* ic_with_type_info_count, int* ic_generic_count,
-                        int* ic_total_count, int* type_info_percentage,
-                        int* generic_percentage) {
-  Code* shared_code = shared->code();
+static void GetICCounts(JSFunction* function, int* ic_with_type_info_count,
+                        int* ic_generic_count, int* ic_total_count,
+                        int* type_info_percentage, int* generic_percentage) {
+  Code* shared_code = function->shared()->code();
   *ic_total_count = 0;
   *ic_generic_count = 0;
   *ic_with_type_info_count = 0;
   Object* raw_info = shared_code->type_feedback_info();
   if (raw_info->IsTypeFeedbackInfo()) {
     TypeFeedbackInfo* info = TypeFeedbackInfo::cast(raw_info);
     *ic_with_type_info_count = info->ic_with_type_info_count();
     *ic_generic_count = info->ic_generic_count();
     *ic_total_count = info->ic_total_count();
   }
 
   // Harvest vector-ics as well
-  TypeFeedbackVector* vector = shared->feedback_vector();
+  TypeFeedbackVector* vector = function->feedback_vector();
   int with = 0, gen = 0;
   vector->ComputeCounts(&with, &gen);
   *ic_with_type_info_count += with;
   *ic_generic_count += gen;
 
   if (*ic_total_count > 0) {
     *type_info_percentage = 100 * *ic_with_type_info_count / *ic_total_count;
     *generic_percentage = 100 * *ic_generic_count / *ic_total_count;
   } else {
     *type_info_percentage = 100;  // Compared against lower bound.
     *generic_percentage = 0;      // Compared against upper bound.
   }
 }
 
 
 void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) {
   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, generic, total, type_percentage, generic_percentage;
-      GetICCounts(function->shared(), &typeinfo, &generic, &total,
-                  &type_percentage, &generic_percentage);
+      GetICCounts(function, &typeinfo, &generic, &total, &type_percentage,
+                  &generic_percentage);
       PrintF(", ICs with typeinfo: %d/%d (%d%%)", typeinfo, total,
              type_percentage);
       PrintF(", generic ICs: %d/%d (%d%%)", generic, total, generic_percentage);
     }
     PrintF("]\n");
   }
 
   function->AttemptConcurrentOptimization();
 }
 
@@ skipping 107 matching lines @@
         }
       }
       continue;
     }
     if (function->IsOptimized()) continue;
 
     int ticks = shared_code->profiler_ticks();
 
     if (ticks >= kProfilerTicksBeforeOptimization) {
       int typeinfo, generic, total, type_percentage, generic_percentage;
-      GetICCounts(shared, &typeinfo, &generic, &total, &type_percentage,
+      GetICCounts(function, &typeinfo, &generic, &total, &type_percentage,
                   &generic_percentage);
       if (type_percentage >= FLAG_type_info_threshold &&
           generic_percentage <= FLAG_generic_ic_threshold) {
         // If this particular function hasn't had any ICs patched for enough
         // ticks, optimize it now.
         Optimize(function, "hot and stable");
       } else if (ticks >= kTicksWhenNotEnoughTypeInfo) {
         Optimize(function, "not much type info but very hot");
       } else {
         shared_code->set_profiler_ticks(ticks + 1);
         if (FLAG_trace_opt_verbose) {
           PrintF("[not yet optimizing ");
           function->PrintName();
           PrintF(", not enough type info: %d/%d (%d%%)]\n", typeinfo, total,
                  type_percentage);
         }
       }
     } else if (!any_ic_changed_ &&
                shared_code->instruction_size() < kMaxSizeEarlyOpt) {
       // If no IC was patched since the last tick and this function is very
       // small, optimistically optimize it now.
       int typeinfo, generic, total, type_percentage, generic_percentage;
-      GetICCounts(shared, &typeinfo, &generic, &total, &type_percentage,
+      GetICCounts(function, &typeinfo, &generic, &total, &type_percentage,
                   &generic_percentage);
       if (type_percentage >= FLAG_type_info_threshold &&
           generic_percentage <= FLAG_generic_ic_threshold) {
         Optimize(function, "small function");
       } else {
         shared_code->set_profiler_ticks(ticks + 1);
       }
     } else {
       shared_code->set_profiler_ticks(ticks + 1);
     }
   }
   any_ic_changed_ = false;
 }
 
 
 }  // namespace internal
 }  // namespace v8