[Interpreter] Ensure that a function is compiled before tiering up to baseline.

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 "src/compiler.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "src/asmjs/asm-js.h"
@@ skipping 804 matching lines @@
 }
 
 MaybeHandle<Code> GetBaselineCode(Handle<JSFunction> function) {
   Isolate* isolate = function->GetIsolate();
   VMState<COMPILER> state(isolate);
   PostponeInterruptsScope postpone(isolate);
   Zone zone(isolate->allocator(), ZONE_NAME);
   ParseInfo parse_info(&zone, handle(function->shared()));
   CompilationInfo info(&parse_info, function);
 
+  DCHECK(function->shared()->is_compiled());
+
   // Function no longer needs to be tiered up
   function->shared()->set_marked_for_tier_up(false);
 
   // Reset profiler ticks, function is no longer considered hot.
   if (function->shared()->HasBytecodeArray()) {
     function->shared()->set_profiler_ticks(0);
   }
 
   // Nothing left to do if the function already has baseline code.
   if (function->shared()->code()->kind() == Code::FUNCTION) {
@@ skipping 911 matching lines @@
     DCHECK(shared->is_compiled());
     function->set_literals(cached.literals);
   } else if (shared->is_compiled()) {
     // TODO(mvstanton): pass pretenure flag to EnsureLiterals.
     JSFunction::EnsureLiterals(function);
   }
 }
 
 }  // namespace internal
 }  // namespace v8