Tweak minus zero detect of HChange

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 39d59582beec3d1ba57cad734dc5713e5bdda976..ba8a702b3b9a4ece262defbcc47a330c6beefb7d 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1589,9 +1589,16 @@ Range* HChange::InferRange(Zone* zone) {
   Range* result = (input_range != NULL)
       ? input_range->Copy(zone)
       : HValue::InferRange(zone);
-  result->set_can_be_minus_zero(!to().IsSmiOrInteger32() ||
-                                !(CheckFlag(kAllUsesTruncatingToInt32) ||
-                                  CheckFlag(kAllUsesTruncatingToSmi)));
+
+  if (from().IsSmiOrInteger32() ||
+      (from().IsTagged() && to().IsSmi())) {
+    // Smi/Integer32 can not be minus zero. TaggedToSmi will deopt for non-SMI.
+    result->set_can_be_minus_zero(false);
+  } else {
+    result->set_can_be_minus_zero(!to().IsSmiOrInteger32() ||
+                                  !(CheckFlag(kAllUsesTruncatingToInt32) ||
+                                    CheckFlag(kAllUsesTruncatingToSmi)));
+  }
   if (to().IsSmi()) result->ClampToSmi();
   return result;
 }