Backport r5553 "Do not invoke indexed interceptor getters for negative indice...

src/x64/ic-x64.cc

 // 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
@@ skipping 665 matching lines @@
   // -----------------------------------
   Label slow;
 
   // Load key and receiver.
   __ movq(rax, Operand(rsp, kPointerSize));
   __ movq(rcx, Operand(rsp, 2 * kPointerSize));
 
   // Check that the receiver isn't a smi.
   __ JumpIfSmi(rcx, &slow);
 
-  // Check that the key is a smi.
-  __ JumpIfNotSmi(rax, &slow);
+  // Check that the key is an array index, that is Uint32.
+  __ JumpIfNotPositiveSmi(rax, &slow);
 
   // Get the map of the receiver.
   __ movq(rdx, FieldOperand(rcx, HeapObject::kMapOffset));
 
   // Check that it has indexed interceptor and access checks
   // are not enabled for this object.
   __ movb(rdx, FieldOperand(rdx, Map::kBitFieldOffset));
   __ andb(rdx, Immediate(kSlowCaseBitFieldMask));
   __ cmpb(rdx, Immediate(1 << Map::kHasIndexedInterceptor));
   __ j(not_zero, &slow);
@@ skipping 850 matching lines @@
   __ bind(&miss);
 
   GenerateMiss(masm);
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal