Add logic from KeyedLoadIC generic stub to KeyedCallIC megamorphic stub.

This should make access faster for arrays of functions.

Review URL: http://codereview.chromium.org/2754003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4834 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ic.cc

@@ -58,7 +58,7 @@ static char TransitionMarkFromState(IC::State state) {
 }
 
 void IC::TraceIC(const char* type,
-                 Handle<String> name,
+                 Handle<Object> name,
                  State old_state,
                  Code* new_target,
                  const char* extra_info) {
@@ -610,7 +610,8 @@ Object* KeyedCallIC::LoadFunction(State state,
 
   if (object->IsString() || object->IsNumber() || object->IsBoolean()) {
     ReceiverToObject(object);
-  } else {
+  }
+
   if (FLAG_use_ic && state != MEGAMORPHIC && !object->IsAccessCheckNeeded()) {
     int argc = target()->arguments_count();
     InLoopFlag in_loop = target()->ic_in_loop();
@@ -618,7 +619,10 @@ Object* KeyedCallIC::LoadFunction(State state,
         argc, in_loop, Code::KEYED_CALL_IC);
     if (!code->IsFailure()) {
       set_target(Code::cast(code));
-      }
+#ifdef DEBUG
+      TraceIC(
+          "KeyedCallIC", key, state, target(), in_loop ? " (in-loop)" : "");
+#endif
     }
   }
   Object* result = Runtime::GetObjectProperty(object, key);

src/ic.h

@@ -140,7 +140,7 @@ class IC {
 
 #ifdef DEBUG
   static void TraceIC(const char* type,
-                      Handle<String> name,
+                      Handle<Object> name,
                       State old_state,
                       Code* new_target,
                       const char* extra_info = "");

src/v8-counters.h

@@ -126,6 +126,14 @@ namespace internal {
   SC(keyed_load_generic_lookup_cache, V8.KeyedLoadGenericLookupCache) \
   SC(keyed_load_generic_slow, V8.KeyedLoadGenericSlow)                \
   SC(keyed_load_external_array_slow, V8.KeyedLoadExternalArraySlow)   \
+  /* How is the generic keyed-call stub used? */                      \
+  SC(keyed_call_generic_smi_fast, V8.KeyedCallGenericSmiFast)         \
+  SC(keyed_call_generic_smi_dict, V8.KeyedCallGenericSmiDict)         \
+  SC(keyed_call_generic_lookup_cache, V8.KeyedCallGenericLookupCache) \
+  SC(keyed_call_generic_lookup_dict, V8.KeyedCallGenericLookupDict)   \
+  SC(keyed_call_generic_value_type, V8.KeyedCallGenericValueType)     \
+  SC(keyed_call_generic_slow, V8.KeyedCallGenericSlow)                \
+  SC(keyed_call_generic_slow_load, V8.KeyedCallGenericSlowLoad)       \
   /* Count how much the monomorphic keyed-load stubs are hit. */      \
   SC(keyed_load_function_prototype, V8.KeyedLoadFunctionPrototype)    \
   SC(keyed_load_string_length, V8.KeyedLoadStringLength)              \

test/mjsunit/keyed-call-generic.js

+// Copyright 2010 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.
+
+// A test for keyed call ICs with a mix of smi and string keys.
+
+function testOne(receiver, key, result) {
+  for(var i = 0; i != 10; i++ ) {
+    assertEquals(result, receiver[key]());
+  }
+}
+
+function testMany(receiver, keys, results) {
+  for (var i = 0; i != 10; i++) {
+    for (var k = 0; k != keys.length; k++) {
+      assertEquals(results[k], receiver[keys[k]]());
+    }
+  }
+}
+
+var toStringNonSymbol = 'to';
+toStringNonSymbol += 'String';
+
+function TypeOfThis() { return typeof this; }
+
+Number.prototype.square = function() { return this * this; }
+Number.prototype.power4 = function() { return this.square().square(); }
+
+Number.prototype.type = TypeOfThis;
+String.prototype.type = TypeOfThis;
+Boolean.prototype.type = TypeOfThis;
+
+// Use a non-symbol key to force inline cache to generic case.
+testOne(0, toStringNonSymbol, '0');
+
+testOne(1, 'toString', '1');
+testOne('1', 'toString', '1');
+testOne(1.0, 'toString', '1');
+
+testOne(1, 'type', 'object');
+testOne(2.3, 'type', 'object');
+testOne('x', 'type', 'object');
+testOne(true, 'type', 'object');
+testOne(false, 'type', 'object');
+
+testOne(2, 'square', 4);
+testOne(2, 'power4', 16);
+
+function zero  () { return 0; }
+function one   () { return 1; }
+function two   () { return 2; }
+
+var fixed_array = [zero, one, two];
+
+var dict_array = [ zero, one, two ];
+dict_array[100000] = 1;
+
+var fast_prop = { zero: zero, one: one, two: two };
+
+var normal_prop = { zero: zero, one: one, two: two };
+normal_prop.x = 0;
+delete normal_prop.x;
+
+var first3num = [0, 1, 2];
+var first3str = ['zero', 'one', 'two'];
+
+// Use a non-symbol key to force inline cache to generic case.
+testMany('123', [toStringNonSymbol, 'charAt', 'charCodeAt'], ['123', '1', 49]);
+
+testMany(fixed_array, first3num, first3num);
+testMany(dict_array, first3num, first3num);
+testMany(fast_prop, first3str, first3num);
+testMany(normal_prop, first3str, first3num);