[heap] Make link from optimized code to inlined code explicit.

src/compiler/code-generator.cc

 // Copyright 2013 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/compiler/code-generator.h"
 
 #include "src/address-map.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
@@ skipping 74 matching lines @@
 
   // Define deoptimization literals for all inlined functions.
   DCHECK_EQ(0u, deoptimization_literals_.size());
   for (auto& inlined : info->inlined_functions()) {
     if (!inlined.shared_info.is_identical_to(info->shared_info())) {
       DefineDeoptimizationLiteral(inlined.shared_info);
     }
   }
   inlined_function_count_ = deoptimization_literals_.size();
 
+  // Define deoptimization literals for all unoptimized code objects of inlined
+  // functions. This ensures unoptimized code is kept alive by optimized code.
+  for (auto& inlined : info->inlined_functions()) {
+    if (!inlined.shared_info.is_identical_to(info->shared_info())) {
+      DefineDeoptimizationLiteral(inlined.inlined_code_object_root);
+    }
+  }
+
   // Assemble all non-deferred blocks, followed by deferred ones.
   for (int deferred = 0; deferred < 2; ++deferred) {
     for (auto const block : code()->instruction_blocks()) {
       if (block->IsDeferred() == (deferred == 0)) {
         continue;
       }
       // Align loop headers on 16-byte boundaries.
       if (block->IsLoopHeader()) masm()->Align(16);
       // Ensure lazy deopt doesn't patch handler entry points.
       if (block->IsHandler()) EnsureSpaceForLazyDeopt();
@@ skipping 584 matching lines @@
     : frame_(gen->frame()), masm_(gen->masm()), next_(gen->ools_) {
   gen->ools_ = this;
 }
 
 
 OutOfLineCode::~OutOfLineCode() {}
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8