Fix fun.apply(receiver, arguments) optimization.

R=kmillikin@chromium.org
BUG=v8:1592
TEST=mjsunit/regress/regress-1592.js

Review URL: http://codereview.chromium.org/7497067

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8884 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index a5cb555..e9bb4ea 100644 (file)
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1587,8 +1587,6 @@ bool Genesis::InstallNatives() {
   global_context()->set_string_function_prototype_map(
       HeapObject::cast(string_function->initial_map()->prototype())->map());
 
-  InstallBuiltinFunctionIds();
-
   // Install Function.prototype.call and apply.
   { Handle<String> key = factory()->function_class_symbol();
     Handle<JSFunction> function =
@@ -1622,6 +1620,8 @@ bool Genesis::InstallNatives() {
     apply->shared()->set_length(2);
   }
 
+  InstallBuiltinFunctionIds();
+
   // Create a constructor for RegExp results (a variant of Array that
   // predefines the two properties index and match).
   {

diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index be56c67..add82fd 100644 (file)
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -4762,10 +4762,17 @@ bool HGraphBuilder::TryCallApply(Call* expr) {
   Property* prop = callee->AsProperty();
   ASSERT(prop != NULL);
 
-  if (info()->scope()->arguments() == NULL) return false;
+  if (!expr->IsMonomorphic() || expr->check_type() != RECEIVER_MAP_CHECK) {
+    return false;
+  }
+  Handle<Map> function_map = expr->GetReceiverTypes()->first();
+  if (function_map->instance_type() != JS_FUNCTION_TYPE ||
+      !expr->target()->shared()->HasBuiltinFunctionId() ||
+      expr->target()->shared()->builtin_function_id() != kFunctionApply) {
+    return false;
+  }
 
-  Handle<String> name = prop->key()->AsLiteral()->AsPropertyName();
-  if (!name->IsEqualTo(CStrVector("apply"))) return false;
+  if (info()->scope()->arguments() == NULL) return false;
 
   ZoneList<Expression*>* args = expr->arguments();
   if (args->length() != 2) return false;
@@ -4775,9 +4782,6 @@ bool HGraphBuilder::TryCallApply(Call* expr) {
   HValue* arg_two_value = environment()->Lookup(arg_two->var());
   if (!arg_two_value->CheckFlag(HValue::kIsArguments)) return false;
 
-  if (!expr->IsMonomorphic() ||
-      expr->check_type() != RECEIVER_MAP_CHECK) return false;
-
   // Our implementation of arguments (based on this stack frame or an
   // adapter below it) does not work for inlined functions.
   if (function_state()->outer() != NULL) {
@@ -4794,10 +4798,7 @@ bool HGraphBuilder::TryCallApply(Call* expr) {
   HValue* receiver = Pop();
   HInstruction* elements = AddInstruction(new(zone()) HArgumentsElements);
   HInstruction* length = AddInstruction(new(zone()) HArgumentsLength(elements));
-  AddCheckConstantFunction(expr,
-                           function,
-                           expr->GetReceiverTypes()->first(),
-                           true);
+  AddCheckConstantFunction(expr, function, function_map, true);
   HInstruction* result =
       new(zone()) HApplyArguments(function, receiver, length, elements);
   result->set_position(expr->position());

diff --git a/src/hydrogen.h b/src/hydrogen.h
index 05c42dd..9922551 100644 (file)
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -874,7 +874,10 @@ class HGraphBuilder: public AstVisitor {
                                             bool is_store);
 
   bool TryArgumentsAccess(Property* expr);
+
+  // Try to optimize fun.apply(receiver, arguments) pattern.
   bool TryCallApply(Call* expr);
+
   bool TryInline(Call* expr);
   bool TryInlineBuiltinFunction(Call* expr,
                                 HValue* receiver,

diff --git a/src/objects.h b/src/objects.h
index ff13aed..c85a69c 100644 (file)
--- a/src/objects.h
+++ b/src/objects.h
@@ -4444,6 +4444,7 @@ class Script: public Struct {
 #define FUNCTIONS_WITH_ID_LIST(V)                   \
   V(Array.prototype, push, ArrayPush)               \
   V(Array.prototype, pop, ArrayPop)                 \
+  V(Function.prototype, apply, FunctionApply)       \
   V(String.prototype, charCodeAt, StringCharCodeAt) \
   V(String.prototype, charAt, StringCharAt)         \
   V(String, fromCharCode, StringFromCharCode)       \

diff --git a/test/mjsunit/regress/regress-1592.js b/test/mjsunit/regress/regress-1592.js
new file mode 100644 (file)
index 0000000..8f6fba0
--- /dev/null
+++ b/test/mjsunit/regress/regress-1592.js
@@ -0,0 +1,45 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+var f = {
+  apply: function(a, b) {}
+};
+
+function test(a) {
+  f.apply(this, arguments);
+}
+
+// Initialize ICs.
+test(1);
+test(1);
+
+%OptimizeFunctionOnNextCall(test);
+
+// Kaboom!
+test(1);