[turbofan] Make MachineType a pair of enums.

test/unittests/compiler/move-optimizer-unittest.cc

Index: test/unittests/compiler/move-optimizer-unittest.cc
diff --git a/test/unittests/compiler/move-optimizer-unittest.cc b/test/unittests/compiler/move-optimizer-unittest.cc
index 66eb9abc4f802b17e70df84c1dbf97b58f3f6244..413c58b6feb48684bd1a50974896e219ef3326d6 100644
--- a/test/unittests/compiler/move-optimizer-unittest.cc
+++ b/test/unittests/compiler/move-optimizer-unittest.cc
@@ -67,16 +67,16 @@ class MoveOptimizerTest : public InstructionSequenceTest {
       case kConstant:
         return ConstantOperand(op.value_);
       case kFixedSlot:
-        return AllocatedOperand(LocationOperand::STACK_SLOT, kRepWord32,
-                                op.value_);
+        return AllocatedOperand(LocationOperand::STACK_SLOT,
+                                MachineRepresentation::kWord32, op.value_);
       case kFixedRegister:
         CHECK(0 <= op.value_ && op.value_ < num_general_registers());
-        return AllocatedOperand(LocationOperand::REGISTER, kRepWord32,
-                                op.value_);
+        return AllocatedOperand(LocationOperand::REGISTER,
+                                MachineRepresentation::kWord32, op.value_);
       case kExplicit:
         CHECK(0 <= op.value_ && op.value_ < num_general_registers());
-        return ExplicitOperand(LocationOperand::REGISTER, kRepWord32,
-                               op.value_);
+        return ExplicitOperand(LocationOperand::REGISTER,
+                               MachineRepresentation::kWord32, op.value_);
       default:
         break;
     }