Flush the optimizing compilejob queue when doing memory pressure GCs

src/heap/heap.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/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/scopeinfo.h"
 #include "src/base/bits.h"
@@ skipping 4354 matching lines @@
 
  private:
   // v8::internal::CancelableTask overrides.
   void RunInternal() override { heap_->CheckMemoryPressure(); }
 
   Heap* heap_;
   DISALLOW_COPY_AND_ASSIGN(MemoryPressureInterruptTask);
 };
 
 void Heap::CheckMemoryPressure() {
+  if (HighMemoryPressure()) {
+    if (isolate()->concurrent_recompilation_enabled()) {
+      // The optimizing compiler may be unnecessarily holding on to memory.
+      DisallowHeapAllocation no_recursive_gc;
+      isolate()->optimizing_compile_dispatcher()->Flush();
+    }
+  }
   if (memory_pressure_level_.Value() == MemoryPressureLevel::kCritical) {
     CollectGarbageOnMemoryPressure("memory pressure");
   } else if (memory_pressure_level_.Value() == MemoryPressureLevel::kModerate) {
     if (FLAG_incremental_marking && incremental_marking()->IsStopped()) {
       StartIdleIncrementalMarking();
     }
   }
   MemoryReducer::Event event;
   event.type = MemoryReducer::kPossibleGarbage;
   event.time_ms = MonotonicallyIncreasingTimeInMs();
@@ skipping 2043 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8