Remove the first_right_arg hack for HMod.

src/hydrogen-instructions.cc

 // Copyright 2012 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 3912 matching lines @@
       return H_CONSTANT_DOUBLE(OS::nan_value());
     }
   }
   return new(zone) HMathMinMax(context, left, right, op);
 }
 
 
 HInstruction* HMod::New(Zone* zone,
                         HValue* context,
                         HValue* left,
-                        HValue* right,
-                        Maybe<int> fixed_right_arg) {
+                        HValue* right) {
   if (FLAG_fold_constants && left->IsConstant() && right->IsConstant()) {
     HConstant* c_left = HConstant::cast(left);
     HConstant* c_right = HConstant::cast(right);
     if (c_left->HasInteger32Value() && c_right->HasInteger32Value()) {
       int32_t dividend = c_left->Integer32Value();
       int32_t divisor = c_right->Integer32Value();
       if (dividend == kMinInt && divisor == -1) {
         return H_CONSTANT_DOUBLE(-0.0);
       }
       if (divisor != 0) {
         int32_t res = dividend % divisor;
         if ((res == 0) && (dividend < 0)) {
           return H_CONSTANT_DOUBLE(-0.0);
         }
         return H_CONSTANT_INT(res);
       }
     }
   }
-  return new(zone) HMod(context, left, right, fixed_right_arg);
+  return new(zone) HMod(context, left, right);
 }
 
 
 HInstruction* HDiv::New(
     Zone* zone, HValue* context, HValue* left, HValue* right) {
   // If left and right are constant values, try to return a constant value.
   if (FLAG_fold_constants && left->IsConstant() && right->IsConstant()) {
     HConstant* c_left = HConstant::cast(left);
     HConstant* c_right = HConstant::cast(right);
     if ((c_left->HasNumberValue() && c_right->HasNumberValue())) {
@@ skipping 411 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal