[Turbofan]: Use new MachineTypes in access-builder.

src/compiler/simplified-operator-reducer.cc

Index: src/compiler/simplified-operator-reducer.cc
diff --git a/src/compiler/simplified-operator-reducer.cc b/src/compiler/simplified-operator-reducer.cc
index d8bd1e0232eb558cb46e6275f2e763d1f333db76..e035f3c7524b797d884dd93ffbde59c0d14ab15a 100644
--- a/src/compiler/simplified-operator-reducer.cc
+++ b/src/compiler/simplified-operator-reducer.cc
@@ -67,7 +67,14 @@ Reduction SimplifiedOperatorReducer::Reduce(Node* node) {
       if (m.IsChangeTaggedToFloat64()) return Replace(m.node()->InputAt(0));
       break;
     }
-    case IrOpcode::kChangeInt31ToTaggedSigned:
+    case IrOpcode::kChangeInt31ToTaggedSigned: {
+      Int32Matcher m(node->InputAt(0));

[Michael Starzinger, 2016/08/22 12:59:46]

nit: Seems like a copy of the below, why the expansion?

[mvstanton, 2016/08/24 16:06:28]

Done.

+      if (m.HasValue()) return ReplaceNumber(m.Value());
+      if (m.IsChangeTaggedToInt32() || m.IsChangeTaggedSignedToInt32()) {
+        return Replace(m.InputAt(0));
+      }
+      break;
+    }
     case IrOpcode::kChangeInt32ToTagged: {
       Int32Matcher m(node->InputAt(0));
       if (m.HasValue()) return ReplaceNumber(m.Value());