Revert r6748....

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
===================================================================
--- src/hydrogen-instructions.cc	(revision 6753)
+++ src/hydrogen-instructions.cc	(working copy)
@@ -721,12 +721,6 @@
 }
 
 
-void HNeg::PrintDataTo(StringStream* stream) const {
-  HUnaryOperation::PrintDataTo(stream);
-  if (CheckFlag(kBailoutOnMinusZero)) stream->Add(" -0?");
-}
-
-
 HCheckInstanceType* HCheckInstanceType::NewIsJSObjectOrJSFunction(
     HValue* value)  {
   STATIC_ASSERT((LAST_JS_OBJECT_TYPE + 1) == JS_FUNCTION_TYPE);
@@ -898,22 +892,6 @@
 }
 
 
-Range* HNeg::InferRange() {
-  if (representation().IsInteger32()) {
-    Range* input_range = value()->range();
-    Range* result = input_range->Copy();
-    Range neg_one(-1, -1);
-    if (!result->MulAndCheckOverflow(&neg_one)) {
-      ClearFlag(HValue::kCanOverflow);
-    }
-    result->set_can_be_minus_zero(input_range->CanBeZero());
-    return result;
-  } else {
-    return HValue::InferRange();
-  }
-}
-
-
 void HPhi::PrintTo(StringStream* stream) const {
   stream->Add("[");
   for (int i = 0; i < OperandCount(); ++i) {
@@ -1336,11 +1314,6 @@
 }
 
 
-HType HNeg::CalculateInferredType() const {
-  return HType::TaggedNumber();
-}
-
-
 HType HUnaryMathOperation::CalculateInferredType() const {
   return HType::TaggedNumber();
 }
@@ -1419,15 +1392,6 @@
 }
 
 
-HValue* HNeg::EnsureAndPropagateNotMinusZero(BitVector* visited) {
-  visited->Add(id());
-  if (range() == NULL || range()->CanBeMinusZero()) {
-    SetFlag(kBailoutOnMinusZero);
-  }
-  return NULL;
-}
-
-
 HValue* HSub::EnsureAndPropagateNotMinusZero(BitVector* visited) {
   visited->Add(id());
   // Propagate to the left argument. If the left argument cannot be -0, then