[TypeFeedbackVector] Root feedback vectors at function literal site.

src/compilation-cache.h

 // 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.
 
 #ifndef V8_COMPILATION_CACHE_H_
 #define V8_COMPILATION_CACHE_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 
@@ skipping 58 matching lines @@
   int generations_;  // Number of generations.
   Object** tables_;  // Compilation cache tables - one for each generation.
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompilationSubCache);
 };
 
 
 // Sub-cache for scripts.
 class CompilationCacheScript : public CompilationSubCache {
  public:
-  CompilationCacheScript(Isolate* isolate, int generations);
+  explicit CompilationCacheScript(Isolate* isolate);
 
-  Handle<SharedFunctionInfo> Lookup(Handle<String> source, Handle<Object> name,
-                                    int line_offset, int column_offset,
-                                    ScriptOriginOptions resource_options,
-                                    Handle<Context> context,
-                                    LanguageMode language_mode);
-  void Put(Handle<String> source,
-           Handle<Context> context,
-           LanguageMode language_mode,
-           Handle<SharedFunctionInfo> function_info);
+  InfoVectorPair Lookup(Handle<String> source, Handle<Object> name,
+                        int line_offset, int column_offset,
+                        ScriptOriginOptions resource_options,
+                        Handle<Context> context, LanguageMode language_mode);
+
+  void Put(Handle<String> source, Handle<Context> context,
+           LanguageMode language_mode, Handle<SharedFunctionInfo> function_info,
+           Handle<Cell> literals);
 
  private:
   bool HasOrigin(Handle<SharedFunctionInfo> function_info, Handle<Object> name,
                  int line_offset, int column_offset,
                  ScriptOriginOptions resource_options);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompilationCacheScript);
 };
 
 
 // Sub-cache for eval scripts. Two caches for eval are used. One for eval calls
 // in native contexts and one for eval calls in other contexts. The cache
 // considers the following pieces of information when checking for matching
 // entries:
 // 1. The source string.
 // 2. The shared function info of the calling function.
 // 3. Whether the source should be compiled as strict code or as sloppy code.
 //    Note: Currently there are clients of CompileEval that always compile
 //    sloppy code even if the calling function is a strict mode function.
 //    More specifically these are the CompileString, DebugEvaluate and
 //    DebugEvaluateGlobal runtime functions.
 // 4. The start position of the calling scope.
 class CompilationCacheEval: public CompilationSubCache {
  public:
-  CompilationCacheEval(Isolate* isolate, int generations)
-      : CompilationSubCache(isolate, generations) { }
+  explicit CompilationCacheEval(Isolate* isolate)
+      : CompilationSubCache(isolate, 1) {}
 
-  MaybeHandle<SharedFunctionInfo> Lookup(Handle<String> source,
-                                         Handle<SharedFunctionInfo> outer_info,
-                                         LanguageMode language_mode,
-                                         int scope_position);
+  InfoVectorPair Lookup(Handle<String> source,
+                        Handle<SharedFunctionInfo> outer_info,
+                        Handle<Context> native_context,
+                        LanguageMode language_mode, int scope_position);
 
   void Put(Handle<String> source, Handle<SharedFunctionInfo> outer_info,
-           Handle<SharedFunctionInfo> function_info, int scope_position);
+           Handle<SharedFunctionInfo> function_info,
+           Handle<Context> native_context, Handle<Cell> literals,
+           int scope_position);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompilationCacheEval);
 };
 
 
 // Sub-cache for regular expressions.
 class CompilationCacheRegExp: public CompilationSubCache {
  public:
   CompilationCacheRegExp(Isolate* isolate, int generations)
       : CompilationSubCache(isolate, generations) { }
 
   MaybeHandle<FixedArray> Lookup(Handle<String> source, JSRegExp::Flags flags);
 
   void Put(Handle<String> source,
            JSRegExp::Flags flags,
            Handle<FixedArray> data);
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompilationCacheRegExp);
 };
 
-
 // The compilation cache keeps shared function infos for compiled
 // scripts and evals. The shared function infos are looked up using
 // the source string as the key. For regular expressions the
 // compilation data is cached.
 class CompilationCache {
  public:
   // Finds the script shared function info for a source
   // string. Returns an empty handle if the cache doesn't contain a
   // script for the given source string with the right origin.
-  MaybeHandle<SharedFunctionInfo> LookupScript(
-      Handle<String> source, Handle<Object> name, int line_offset,
-      int column_offset, ScriptOriginOptions resource_options,
-      Handle<Context> context, LanguageMode language_mode);
+  InfoVectorPair LookupScript(Handle<String> source, Handle<Object> name,
+                              int line_offset, int column_offset,
+                              ScriptOriginOptions resource_options,
+                              Handle<Context> context,
+                              LanguageMode language_mode);
 
   // Finds the shared function info for a source string for eval in a
   // given context.  Returns an empty handle if the cache doesn't
   // contain a script for the given source string.
-  MaybeHandle<SharedFunctionInfo> LookupEval(
-      Handle<String> source, Handle<SharedFunctionInfo> outer_info,
-      Handle<Context> context, LanguageMode language_mode, int scope_position);
+  InfoVectorPair LookupEval(Handle<String> source,
+                            Handle<SharedFunctionInfo> outer_info,
+                            Handle<Context> context, LanguageMode language_mode,
+                            int scope_position);
 
   // Returns the regexp data associated with the given regexp if it
   // is in cache, otherwise an empty handle.
   MaybeHandle<FixedArray> LookupRegExp(
       Handle<String> source, JSRegExp::Flags flags);
 
   // Associate the (source, kind) pair to the shared function
   // info. This may overwrite an existing mapping.
-  void PutScript(Handle<String> source,
-                 Handle<Context> context,
+  void PutScript(Handle<String> source, Handle<Context> context,
                  LanguageMode language_mode,
-                 Handle<SharedFunctionInfo> function_info);
+                 Handle<SharedFunctionInfo> function_info,
+                 Handle<Cell> literals);
 
   // Associate the (source, context->closure()->shared(), kind) triple
   // with the shared function info. This may overwrite an existing mapping.
   void PutEval(Handle<String> source, Handle<SharedFunctionInfo> outer_info,
                Handle<Context> context,
-               Handle<SharedFunctionInfo> function_info, int scope_position);
+               Handle<SharedFunctionInfo> function_info, Handle<Cell> literals,
+               int scope_position);
 
   // Associate the (source, flags) pair to the given regexp data.
   // This may overwrite an existing mapping.
   void PutRegExp(Handle<String> source,
                  JSRegExp::Flags flags,
                  Handle<FixedArray> data);
 
   // Clear the cache - also used to initialize the cache at startup.
   void Clear();
 
@@ skipping 41 matching lines @@
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationCache);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILATION_CACHE_H_