| Index: src/compiler/representation-change.cc | 
| diff --git a/src/compiler/representation-change.cc b/src/compiler/representation-change.cc | 
| index 8ed177740bdeb4565a7209594b0f61e871b3124e..928c31b1b05513736639b5efe4cf38c1b294e4a8 100644 | 
| --- a/src/compiler/representation-change.cc | 
| +++ b/src/compiler/representation-change.cc | 
| @@ -326,7 +326,10 @@ | 
| } else if (output_rep == | 
| MachineRepresentation::kFloat32) {  // float32 -> float64 -> tagged | 
| node = InsertChangeFloat32ToFloat64(node); | 
| -    op = simplified()->ChangeFloat64ToTagged(); | 
| +    op = simplified()->ChangeFloat64ToTagged( | 
| +        output_type->Maybe(Type::MinusZero()) | 
| +            ? CheckForMinusZeroMode::kCheckForMinusZero | 
| +            : CheckForMinusZeroMode::kDontCheckForMinusZero); | 
| } else if (output_rep == MachineRepresentation::kFloat64) { | 
| if (output_type->Is(Type::Signed31())) {  // float64 -> int32 -> tagged | 
| node = InsertChangeFloat64ToInt32(node); | 
| @@ -340,7 +343,10 @@ | 
| node = InsertChangeFloat64ToUint32(node); | 
| op = simplified()->ChangeUint32ToTagged(); | 
| } else { | 
| -      op = simplified()->ChangeFloat64ToTagged(); | 
| +      op = simplified()->ChangeFloat64ToTagged( | 
| +          output_type->Maybe(Type::MinusZero()) | 
| +              ? CheckForMinusZeroMode::kCheckForMinusZero | 
| +              : CheckForMinusZeroMode::kDontCheckForMinusZero); | 
| } | 
| } else { | 
| return TypeError(node, output_rep, output_type, | 
|  |