commit da12d29b40bc9ac10bcdeb5696b69c3ed0d3133f
author Ben Murdoch <benm@google.com> Thu Jun 02 14:46:10 2016 +0100
committer Dirk Vogt <dirk@fairphone.com> Fri Mar 17 16:06:11 2017 +0100
tree f11e06aa13d44d9524519b744c8a645b7578ffd9
parent 097c5b25f8b57b92e6c94f25383a883ff242344f

Upgrade V8 to 5.1.281.57  DO NOT MERGE

FPIIM-449

Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)

src/compiler/simplified-operator-reducer.cc

diff --git a/src/compiler/simplified-operator-reducer.cc b/src/compiler/simplified-operator-reducer.cc
index 120d792..012004a 100644
--- a/src/compiler/simplified-operator-reducer.cc
+++ b/src/compiler/simplified-operator-reducer.cc
@@ -9,14 +9,14 @@
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/operator-properties.h"
 #include "src/conversions-inl.h"
+#include "src/type-cache.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 SimplifiedOperatorReducer::SimplifiedOperatorReducer(JSGraph* jsgraph)
-    : jsgraph_(jsgraph) {}
-
+    : jsgraph_(jsgraph), type_cache_(TypeCache::Get()) {}
 
 SimplifiedOperatorReducer::~SimplifiedOperatorReducer() {}
 
@@ -89,6 +89,17 @@
       if (m.HasValue()) return ReplaceNumber(FastUI2D(m.Value()));
       break;
     }
+    case IrOpcode::kNumberCeil:
+    case IrOpcode::kNumberFloor:
+    case IrOpcode::kNumberRound:
+    case IrOpcode::kNumberTrunc: {
+      Node* const input = NodeProperties::GetValueInput(node, 0);
+      Type* const input_type = NodeProperties::GetType(input);
+      if (input_type->Is(type_cache_.kIntegerOrMinusZeroOrNaN)) {
+        return Replace(input);
+      }
+      break;
+    }
     case IrOpcode::kReferenceEqual:
       return ReduceReferenceEqual(node);
     default:
@@ -97,7 +108,6 @@
   return NoChange();
 }
 
-
 Reduction SimplifiedOperatorReducer::ReduceReferenceEqual(Node* node) {
   DCHECK_EQ(IrOpcode::kReferenceEqual, node->opcode());
   Node* const left = NodeProperties::GetValueInput(node, 0);