New approach to Crankshaft decision-making

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index 1b992ec44c4ac2153fc8d7083bb4544710361e84..f1e8f61cc6272b23db6dcb0b9d9fb25bb2172da8 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -882,7 +882,9 @@ class StaticMarkingVisitor : public StaticVisitorBase {
   static inline void VisitCodeTarget(Heap* heap, RelocInfo* rinfo) {
     ASSERT(RelocInfo::IsCodeTarget(rinfo->rmode()));
     Code* target = Code::GetCodeFromTargetAddress(rinfo->target_address());
-    if (FLAG_cleanup_code_caches_at_gc && target->is_inline_cache_stub()) {
+    if (FLAG_cleanup_code_caches_at_gc && target->is_inline_cache_stub()
+        && (target->ic_state() == MEGAMORPHIC || Serializer::enabled() ||
+            heap->isolate()->context_exit_happened())) {
       IC::Clear(rinfo->pc());
       // Please note targets for cleared inline cached do not have to be
       // marked since they are contained in HEAP->non_monomorphic_cache().
@@ -2142,8 +2144,7 @@ void MarkCompactCollector::AfterMarking() {
     code_flusher_->ProcessCandidates();
   }
 
-  // Clean up dead objects from the runtime profiler.
-  heap()->isolate()->runtime_profiler()->RemoveDeadSamples();
+  heap()->isolate()->set_context_exit_happened(false);
 }
 
 
@@ -3147,10 +3148,6 @@ void MarkCompactCollector::EvacuateNewSpaceAndCandidates() {
   heap_->UpdateReferencesInExternalStringTable(
       &UpdateReferenceInExternalStringTableEntry);
 
-  // Update JSFunction pointers from the runtime profiler.
-  heap()->isolate()->runtime_profiler()->UpdateSamplesAfterCompact(
-      &updating_visitor);
-
   EvacuationWeakObjectRetainer evacuation_object_retainer;
   heap()->ProcessWeakReferences(&evacuation_object_retainer);