Fixed range analysis for HMathFloorOfDiv.

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 1770 matching lines @@
                                !CheckFlag(kAllUsesTruncatingToInt32) &&
                                ((a->CanBeZero() && b->CanBeNegative()) ||
                                 (a->CanBeNegative() && b->CanBeZero())));
     return res;
   } else {
     return HValue::InferRange(zone);
   }
 }
 
 
-Range* HDiv::InferRange(Zone* zone) {
+Range* HBinaryOperation::InferRangeForDiv(Zone* zone) {
   if (representation().IsInteger32()) {
     Range* a = left()->range();
     Range* b = right()->range();
     Range* result = new(zone) Range();
     result->set_can_be_minus_zero(!CheckFlag(kAllUsesTruncatingToInt32) &&
                                   (a->CanBeMinusZero() ||
                                    (a->CanBeZero() && b->CanBeNegative())));
     if (!a->Includes(kMinInt) || !b->Includes(-1)) {
-      ClearFlag(HValue::kCanOverflow);
+      ClearFlag(kCanOverflow);
     }
 
     if (!b->CanBeZero()) {
-      ClearFlag(HValue::kCanBeDivByZero);
+      ClearFlag(kCanBeDivByZero);
     }
     return result;
   } else {
     return HValue::InferRange(zone);
   }
 }
 
 
+Range* HDiv::InferRange(Zone* zone) {
+  return InferRangeForDiv(zone);
+}
+
+
+Range* HMathFloorOfDiv::InferRange(Zone* zone) {
+  return InferRangeForDiv(zone);
+}
+
+
 Range* HMod::InferRange(Zone* zone) {
   if (representation().IsInteger32()) {
     Range* a = left()->range();
     Range* b = right()->range();
 
     // The magnitude of the modulus is bounded by the right operand. Note that
     // apart for the cases involving kMinInt, the calculation below is the same
     // as Max(Abs(b->lower()), Abs(b->upper())) - 1.
     int32_t positive_bound = -(Min(NegAbs(b->lower()), NegAbs(b->upper())) + 1);
 
@@ skipping 2720 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal