[turbofan] Implement sharing of context-independent code.

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 "src/ast-numbering.h"
 #include "src/bootstrapper.h"
@@ skipping 696 matching lines @@
 
 
 static void InsertCodeIntoOptimizedCodeMap(CompilationInfo* info) {
   Handle<Code> code = info->code();
   if (code->kind() != Code::OPTIMIZED_FUNCTION) return;  // Nothing to do.
 
   // Context specialization folds-in the context, so no sharing can occur.
   if (code->is_turbofanned() && info->is_context_specializing()) return;
 
   // Do not cache bound functions.
-  if (info->closure()->shared()->bound()) return;
+  Handle<JSFunction> function = info->closure();
+  if (function->shared()->bound()) return;
 
-  // Cache optimized code.
+  // Cache optimized context-specific code.
   if (FLAG_cache_optimized_code) {
-    Handle<JSFunction> function = info->closure();
     Handle<SharedFunctionInfo> shared(function->shared());
     Handle<FixedArray> literals(function->literals());
     Handle<Context> native_context(function->context()->native_context());
     SharedFunctionInfo::AddToOptimizedCodeMap(shared, native_context, code,
                                               literals, info->osr_ast_id());
   }
+
+  // Do not cache context-independent code compiled for OSR.
+  if (code->is_turbofanned() && info->is_osr()) return;
+
+  // Cache optimized context-independent code.
+  if (FLAG_turbo_cache_shared_code && code->is_turbofanned()) {
+    DCHECK(!info->is_context_specializing());
+    DCHECK(info->osr_ast_id().IsNone());
+    Handle<SharedFunctionInfo> shared(function->shared());
+    SharedFunctionInfo::AddSharedCodeToOptimizedCodeMap(shared, code);
+  }
 }
 
 
 static bool Renumber(ParseInfo* parse_info) {
   if (!AstNumbering::Renumber(parse_info->isolate(), parse_info->zone(),
                               parse_info->function())) {
     return false;
   }
   Handle<SharedFunctionInfo> shared_info = parse_info->shared_info();
   if (!shared_info.is_null()) {
@@ skipping 868 matching lines @@
 
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate(), zone()).PrintProgram(function()));
 }
 #endif
 }  // namespace internal
 }  // namespace v8