Changeset 36039 in webkit for trunk/JavaScriptCore/VM/CodeBlock.cpp

Timestamp:

Sep 2, 2008, 10:04:39 PM (17 years ago)

Author:

[email protected]

Message:

2008-09-02 Geoffrey Garen <​[email protected]>

Reviewed by Oliver Hunt.

Fast path for array.length and string.length.

SunSpider says 0.5% faster.

File:

• trunk/JavaScriptCore/VM/CodeBlock.cpp (modified) (2 diffs)

trunk/JavaScriptCore/VM/CodeBlock.cpp

@@ -561 +561 @@
             break;
         }
+        case op_get_array_length: {
+            printGetByIdOp(location, it, identifiers, "get_array_length");
+            break;
+        }
+        case op_get_string_length: {
+            printGetByIdOp(location, it, identifiers, "get_string_length");
+            break;
+        }
         case op_put_by_id: {
             printPutByIdOp(location, it, identifiers, "put_by_id");
@@ -837 +845 @@
     
     // These instructions don't ref their StructureIDs.
-    ASSERT(vPC[0].u.opcode == machine->getOpcode(op_get_by_id) || vPC[0].u.opcode == machine->getOpcode(op_put_by_id) || vPC[0].u.opcode == machine->getOpcode(op_get_by_id_generic) || vPC[0].u.opcode == machine->getOpcode(op_put_by_id_generic));
+    ASSERT(vPC[0].u.opcode == machine->getOpcode(op_get_by_id) || vPC[0].u.opcode == machine->getOpcode(op_put_by_id) || vPC[0].u.opcode == machine->getOpcode(op_get_by_id_generic) || vPC[0].u.opcode == machine->getOpcode(op_put_by_id_generic) || vPC[0].u.opcode == machine->getOpcode(op_get_array_length) || vPC[0].u.opcode == machine->getOpcode(op_get_string_length));
 }