[turbofan] Create ExplicitOperands to specify operands without virtual registers

src/compiler/instruction.cc

Index: src/compiler/instruction.cc
diff --git a/src/compiler/instruction.cc b/src/compiler/instruction.cc
index 774843ced3038740356b0f5a78f4a0dfc3d3bd7e..1f9543a63531434c279e84cfe01e9be90a3c961b 100644
--- a/src/compiler/instruction.cc
+++ b/src/compiler/instruction.cc
@@ -105,24 +105,22 @@ std::ostream& operator<<(std::ostream& os,
           return os << "[immediate:" << imm.indexed_value() << "]";
       }
     }
+    case InstructionOperand::EXPLICIT:
     case InstructionOperand::ALLOCATED: {
-      auto allocated = AllocatedOperand::cast(op);
-      switch (allocated.allocated_kind()) {
-        case AllocatedOperand::STACK_SLOT:
-          os << "[stack:" << StackSlotOperand::cast(op).index();
-          break;
-        case AllocatedOperand::DOUBLE_STACK_SLOT:
-          os << "[double_stack:" << DoubleStackSlotOperand::cast(op).index();
-          break;
-        case AllocatedOperand::REGISTER:
-          os << "[" << RegisterOperand::cast(op).GetRegister().ToString()
-             << "|R";
-          break;
-        case AllocatedOperand::DOUBLE_REGISTER:
-          os << "["
-             << DoubleRegisterOperand::cast(op).GetDoubleRegister().ToString()
-             << "|R";
-          break;
+      auto allocated = LocationOperand::cast(op);
+      if (op.IsStackSlot()) {
+        os << "[stack:" << LocationOperand::cast(op).index();
+      } else if (op.IsDoubleStackSlot()) {
+        os << "[double_stack:" << LocationOperand::cast(op).index();
+      } else if (op.IsRegister()) {
+        os << "[" << LocationOperand::cast(op).GetRegister().ToString() << "|R";
+      } else {
+        DCHECK(op.IsDoubleRegister());
+        os << "[" << LocationOperand::cast(op).GetDoubleRegister().ToString()
+           << "|R";
+      }
+      if (allocated.IsExplicit()) {
+        os << "|E";
       }
       switch (allocated.machine_type()) {
         case kRepWord32:
@@ -181,11 +179,11 @@ MoveOperands* ParallelMove::PrepareInsertAfter(MoveOperands* move) const {
   MoveOperands* to_eliminate = nullptr;
   for (auto curr : *this) {
     if (curr->IsEliminated()) continue;
-    if (curr->destination().EqualsModuloType(move->source())) {
+    if (curr->destination().EqualsCanonicalized(move->source())) {
       DCHECK(!replacement);
       replacement = curr;
       if (to_eliminate != nullptr) break;
-    } else if (curr->destination().EqualsModuloType(move->destination())) {
+    } else if (curr->destination().EqualsCanonicalized(move->destination())) {
       DCHECK(!to_eliminate);
       to_eliminate = curr;
       if (replacement != nullptr) break;
@@ -197,6 +195,16 @@ MoveOperands* ParallelMove::PrepareInsertAfter(MoveOperands* move) const {
 }
 
 
+ExplicitOperand::ExplicitOperand(LocationKind kind, MachineType machine_type,
+                                 int index)
+    : LocationOperand(EXPLICIT, kind, machine_type, index) {
+  DCHECK_IMPLIES(kind == REGISTER && !IsFloatingPoint(machine_type),
+                 Register::from_code(index).IsAllocatable());
+  DCHECK_IMPLIES(kind == REGISTER && IsFloatingPoint(machine_type),
+                 DoubleRegister::from_code(index).IsAllocatable());
+}
+
+
 Instruction::Instruction(InstructionCode opcode)
     : opcode_(opcode),
       bit_field_(OutputCountField::encode(0) | InputCountField::encode(0) |
@@ -263,7 +271,7 @@ std::ostream& operator<<(std::ostream& os,
 
 void ReferenceMap::RecordReference(const AllocatedOperand& op) {
   // Do not record arguments as pointers.
-  if (op.IsStackSlot() && StackSlotOperand::cast(op).index() < 0) return;
+  if (op.IsStackSlot() && LocationOperand::cast(op).index() < 0) return;
   DCHECK(!op.IsDoubleRegister() && !op.IsDoubleStackSlot());
   reference_operands_.push_back(op);
 }