Fix smi-comparison to use correct macros in X64-SwapElements.

Review URL: http://codereview.chromium.org/5967002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6079 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/codegen-x64.cc

@@ -6784,9 +6784,9 @@ void CodeGenerator::GenerateSwapElements(ZoneList<Expression*>* args) {
 
   // Check that both indices are valid.
   __ movq(tmp2.reg(), FieldOperand(object.reg(), JSArray::kLengthOffset));
-  __ cmpl(tmp2.reg(), index1.reg());
+  __ SmiCompare(tmp2.reg(), index1.reg());
   deferred->Branch(below_equal);
-  __ cmpl(tmp2.reg(), index2.reg());
+  __ SmiCompare(tmp2.reg(), index2.reg());
   deferred->Branch(below_equal);
 
   // Bring addresses into index1 and index2.