Don't demote dmod to imod since there is no case that is guaranteed to produce valid integer results for all inputs (456540, r=danderson).

js/src/jstracer.cpp

@@ -680,14 +680,6 @@ public:
                 return out->insCall(F_Any_setelem_int, args2);
             }
             break;
-          case F_dmod: 
-            // FIXME: We should really have LIR_imod and LIR_idiv (455496).
-            JS_ASSERT(s0->isQuad() && args[1]->isQuad());
-            if (args[1]->isconstq() && args[1]->constvalq() && isPromote(args[1]) && isPromote(s0)) {
-                LIns* args2[] = { demote(out, s0), demote(out, args[1]) };
-                return out->ins1(LIR_i2f, out->insCall(F_imod, args2));
-            }
-            break;
         }
         return out->insCall(fid, args);
     }