Fix %OptimizeFunctionOnNextCall to actually work when the function has not yet been compiled.

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/543643002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23687 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler.cc

@@ -1246,7 +1246,14 @@ MaybeHandle<Code> Compiler::GetOptimizedCode(Handle<JSFunction> function,
   PostponeInterruptsScope postpone(isolate);
 
   Handle<SharedFunctionInfo> shared = info->shared_info();
-  DCHECK_NE(ScopeInfo::Empty(isolate), shared->scope_info());
+  if (ScopeInfo::Empty(isolate) == shared->scope_info()) {
+    // The function was never compiled. Compile it unoptimized first.
+    CompilationInfoWithZone nested(function);
+    nested.EnableDeoptimizationSupport();
+    if (!GetUnoptimizedCodeCommon(&nested).ToHandle(&current_code)) {
+      return MaybeHandle<Code>();
+    }
+  }
   int compiled_size = shared->end_position() - shared->start_position();
   isolate->counters()->total_compile_size()->Increment(compiled_size);
   current_code->set_profiler_ticks(0);

src/objects-inl.h

@@ -4777,9 +4777,10 @@ int Code::profiler_ticks() {
 
 
 void Code::set_profiler_ticks(int ticks) {
-  DCHECK_EQ(FUNCTION, kind());
   DCHECK(ticks < 256);
-  WRITE_BYTE_FIELD(this, kProfilerTicksOffset, ticks);
+  if (kind() == FUNCTION) {
+    WRITE_BYTE_FIELD(this, kProfilerTicksOffset, ticks);
+  }
 }
 
 

src/objects.cc

@@ -9144,7 +9144,6 @@ void JSFunction::JSFunctionIterateBody(int object_size, ObjectVisitor* v) {
 
 
 void JSFunction::MarkForOptimization() {
-  DCHECK(is_compiled() || GetIsolate()->DebuggerHasBreakPoints());
   DCHECK(!IsOptimized());
   DCHECK(shared()->allows_lazy_compilation() ||
          code()->optimizable());

src/runtime.cc

@@ -8457,15 +8457,9 @@ RUNTIME_FUNCTION(Runtime_CompileOptimized) {
   CONVERT_BOOLEAN_ARG_CHECKED(concurrent, 1);
 
   Handle<Code> unoptimized(function->shared()->code());
-  if (!function->shared()->is_compiled()) {
-    // If the function is not compiled, do not optimize.
-    // This can happen if the debugger is activated and
-    // the function is returned to the not compiled state.
-    // TODO(yangguo): reconsider this.
-    function->ReplaceCode(function->shared()->code());
-  } else if (!isolate->use_crankshaft() ||
-             function->shared()->optimization_disabled() ||
-             isolate->DebuggerHasBreakPoints()) {
+  if (!isolate->use_crankshaft() ||
+      function->shared()->optimization_disabled() ||
+      isolate->DebuggerHasBreakPoints()) {
     // If the function is not optimizable or debugger is active continue
     // using the code from the full compiler.
     if (FLAG_trace_opt) {
@@ -8476,16 +8470,16 @@ RUNTIME_FUNCTION(Runtime_CompileOptimized) {
           isolate->DebuggerHasBreakPoints() ? "T" : "F");
     }
     function->ReplaceCode(*unoptimized);
+    return function->code();
+  }
+
+  Compiler::ConcurrencyMode mode =
+      concurrent ? Compiler::CONCURRENT : Compiler::NOT_CONCURRENT;
+  Handle<Code> code;
+  if (Compiler::GetOptimizedCode(function, unoptimized, mode).ToHandle(&code)) {
+    function->ReplaceCode(*code);
   } else {
-    Compiler::ConcurrencyMode mode = concurrent ? Compiler::CONCURRENT
-                                                : Compiler::NOT_CONCURRENT;
-    Handle<Code> code;
-    if (Compiler::GetOptimizedCode(
-            function, unoptimized, mode).ToHandle(&code)) {
-      function->ReplaceCode(*code);
-    } else {
-      function->ReplaceCode(*unoptimized);
-    }
+    function->ReplaceCode(*unoptimized);
   }
 
   DCHECK(function->code()->kind() == Code::FUNCTION ||
@@ -8641,11 +8635,7 @@ RUNTIME_FUNCTION(Runtime_OptimizeFunctionOnNextCall) {
   RUNTIME_ASSERT(args.length() == 1 || args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
 
-  if (!function->IsOptimizable() &&
-      !function->IsMarkedForConcurrentOptimization() &&
-      !function->IsInOptimizationQueue()) {
-    return isolate->heap()->undefined_value();
-  }
+  if (function->IsOptimized()) return isolate->heap()->undefined_value();
 
   function->MarkForOptimization();
 

test/mjsunit/compiler/opt-next-call.js

+// Copyright 2014 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.
+
+// Flags: --allow-natives-syntax
+
+function foo() {
+  return "fooed";
+}
+
+%OptimizeFunctionOnNextCall(foo);
+assertEquals("fooed", foo());
+assertOptimized(foo);