[turbofan] Add MachineType to Phi.

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index 960c93aaba1e583bd895f0a424c82d2b7034f404..a635f98314dc5e4a1a3358dbccee9499dadac700 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -267,7 +267,8 @@ class RepresentationSelector {
   void VisitUint64Cmp(Node* node) { VisitBinop(node, kMachUint64, kRepBit); }
 
   // Helper for handling phis.
-  void VisitPhi(Node* node, MachineTypeUnion use) {
+  void VisitPhi(Node* node, MachineTypeUnion use,
+                SimplifiedLowering* lowering) {
     // First, propagate the usage information to inputs of the phi.
     if (!lower()) {
       int values = OperatorProperties::GetValueInputCount(node->op());
@@ -318,6 +319,13 @@ class RepresentationSelector {
 
     if (lower()) {
       int values = OperatorProperties::GetValueInputCount(node->op());
+
+      // Update the phi operator.
+      MachineType type = static_cast<MachineType>(output_type);
+      if (type != OpParameter<MachineType>(node)) {
+        node->set_op(lowering->common()->Phi(type, values));
+      }
+
       // Convert inputs to the output representation of this phi.
       Node::Inputs inputs = node->inputs();
       for (Node::Inputs::iterator iter(inputs.begin()); iter != inputs.end();
@@ -384,7 +392,7 @@ class RepresentationSelector {
         Enqueue(NodeProperties::GetControlInput(node, 0));
         break;
       case IrOpcode::kPhi:
-        return VisitPhi(node, use);
+        return VisitPhi(node, use, lowering);
 
 //------------------------------------------------------------------
 // JavaScript operators.