A64: Synchronize with r17807.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index ec243012943e8d0641971492bb908135eaa22882..0a3fa6b02dd622a5af4b2c65369354e18a6aefed 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -523,12 +523,19 @@ bool HValue::CanReplaceWithDummyUses() {
 
 
 bool HValue::IsInteger32Constant() {
-  return IsConstant() && HConstant::cast(this)->HasInteger32Value();
+  HValue* value_to_check = IsForceRepresentation()
+      ? HForceRepresentation::cast(this)->value()
+      : this;
+  return value_to_check->IsConstant() &&
+      HConstant::cast(value_to_check)->HasInteger32Value();
 }
 
 
 int32_t HValue::GetInteger32Constant() {
-  return HConstant::cast(this)->Integer32Value();
+  HValue* constant_value = IsForceRepresentation()
+      ? HForceRepresentation::cast(this)->value()
+      : this;
+  return HConstant::cast(constant_value)->Integer32Value();
 }
 
 
@@ -2946,6 +2953,24 @@ void HCompareHoleAndBranch::InferRepresentation(
 }
 
 
+bool HCompareMinusZeroAndBranch::KnownSuccessorBlock(HBasicBlock** block) {
+  if (value()->representation().IsSmiOrInteger32()) {
+    // A Smi or Integer32 cannot contain minus zero.
+    *block = SecondSuccessor();
+    return true;
+  }
+  *block = NULL;
+  return false;
+}
+
+
+void HCompareMinusZeroAndBranch::InferRepresentation(
+    HInferRepresentationPhase* h_infer) {
+  ChangeRepresentation(value()->representation());
+}
+
+
+
 void HGoto::PrintDataTo(StringStream* stream) {
   stream->Add("B%d", SuccessorAt(0)->block_id());
 }
@@ -3381,7 +3406,7 @@ void HAllocate::HandleSideEffectDominator(GVNFlag side_effect,
     }
   }
 
-  if (new_dominator_size > Page::kMaxNonCodeHeapObjectSize) {
+  if (new_dominator_size > isolate()->heap()->MaxRegularSpaceAllocationSize()) {
     if (FLAG_trace_allocation_folding) {
       PrintF("#%d (%s) cannot fold into #%d (%s) due to size: %d\n",
           id(), Mnemonic(), dominator_allocate->id(),