Revert of [turbofan] add MachineType to AllocatedOperand

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index b3054084f4f43902a63b289ade1712a5e5423058..6a7b962b0eeb5f737f1fc0a0be4559d43255daf0 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -146,14 +146,21 @@
   // will need to generate code for it.
   void MarkAsUsed(Node* node);
 
+  // Checks if {node} is marked as double.
+  bool IsDouble(const Node* node) const;
+
+  // Inform the register allocator of a double result.
+  void MarkAsDouble(Node* node);
+
+  // Checks if {node} is marked as reference.
+  bool IsReference(const Node* node) const;
+
+  // Inform the register allocator of a reference result.
+  void MarkAsReference(Node* node);
+
   // Inform the register allocation of the representation of the value produced
   // by {node}.
   void MarkAsRepresentation(MachineType rep, Node* node);
-  void MarkAsWord32(Node* node) { MarkAsRepresentation(kRepWord32, node); }
-  void MarkAsWord64(Node* node) { MarkAsRepresentation(kRepWord64, node); }
-  void MarkAsFloat32(Node* node) { MarkAsRepresentation(kRepFloat32, node); }
-  void MarkAsFloat64(Node* node) { MarkAsRepresentation(kRepFloat64, node); }
-  void MarkAsReference(Node* node) { MarkAsRepresentation(kRepTagged, node); }
 
   // Inform the register allocation of the representation of the unallocated
   // operand {op}.