Generate a custom OSR entrypoint for OSR compiles on all platforms, and transition to optimized cod…

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 65618dda8e2d7c4b749b9bcda88592d7d8ba557e..f09a86ddb70ec342ae004ca91908dfd4648b7379 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -63,7 +63,8 @@ class CompilationInfo {
   Isolate* isolate() const {
     return isolate_;
   }
-  Zone* zone() const { return zone_; }
+  Zone* zone() { return zone_; }
+  bool is_osr() const { return !osr_ast_id_.IsNone(); }
   bool is_lazy() const { return IsLazy::decode(flags_); }
   bool is_eval() const { return IsEval::decode(flags_); }
   bool is_global() const { return IsGlobal::decode(flags_); }
@@ -626,9 +627,9 @@ class Compiler : public AllStatic {
 
   static bool InstallOptimizedCode(OptimizingCompiler* info);
 
-  static BailoutId CompileForOnStackReplacement(Handle<JSFunction> function);
+  static Handle<Code> CompileForOnStackReplacement(Handle<JSFunction> function);
 
-  static BailoutId CompileForConcurrentOSR(Handle<JSFunction> function);
+  static Handle<Code> CompileForConcurrentOSR(Handle<JSFunction> function);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   static bool MakeCodeForLiveEdit(CompilationInfo* info);