[turbofan] Create ExplicitOperands to specify operands without virtual registers

src/compiler/register-allocator-verifier.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/bit-vector.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/register-allocator-verifier.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 30 matching lines @@
     }
   }
 }
 
 }  // namespace
 
 
 void RegisterAllocatorVerifier::VerifyInput(
     const OperandConstraint& constraint) {
   CHECK_NE(kSameAsFirst, constraint.type_);
-  if (constraint.type_ != kImmediate) {
+  if (constraint.type_ != kImmediate && constraint.type_ != kExplicit) {
     CHECK_NE(InstructionOperand::kInvalidVirtualRegister,
              constraint.virtual_register_);
   }
 }
 
 
 void RegisterAllocatorVerifier::VerifyTemp(
     const OperandConstraint& constraint) {
   CHECK_NE(kSameAsFirst, constraint.type_);
   CHECK_NE(kImmediate, constraint.type_);
+  CHECK_NE(kExplicit, constraint.type_);
   CHECK_NE(kConstant, constraint.type_);
 }
 
 
 void RegisterAllocatorVerifier::VerifyOutput(
     const OperandConstraint& constraint) {
   CHECK_NE(kImmediate, constraint.type_);
+  CHECK_NE(kExplicit, constraint.type_);
   CHECK_NE(InstructionOperand::kInvalidVirtualRegister,
            constraint.virtual_register_);
 }
 
 
 RegisterAllocatorVerifier::RegisterAllocatorVerifier(
     Zone* zone, const RegisterConfiguration* config,
     const InstructionSequence* sequence)
     : zone_(zone), config_(config), sequence_(sequence), constraints_(zone) {
   constraints_.reserve(sequence->instructions().size());
@@ skipping 57 matching lines @@
 
 
 void RegisterAllocatorVerifier::BuildConstraint(const InstructionOperand* op,
                                                 OperandConstraint* constraint) {
   constraint->value_ = kMinInt;
   constraint->virtual_register_ = InstructionOperand::kInvalidVirtualRegister;
   if (op->IsConstant()) {
     constraint->type_ = kConstant;
     constraint->value_ = ConstantOperand::cast(op)->virtual_register();
     constraint->virtual_register_ = constraint->value_;
+  } else if (op->IsExplicit()) {
+    constraint->type_ = kExplicit;
   } else if (op->IsImmediate()) {
     auto imm = ImmediateOperand::cast(op);
     int value = imm->type() == ImmediateOperand::INLINE ? imm->inline_value()
                                                         : imm->indexed_value();
     constraint->type_ = kImmediate;
     constraint->value_ = value;
   } else {
     CHECK(op->IsUnallocated());
     const auto* unallocated = UnallocatedOperand::cast(op);
     int vreg = unallocated->virtual_register();
@@ skipping 53 matching lines @@
       auto imm = ImmediateOperand::cast(op);
       int value = imm->type() == ImmediateOperand::INLINE
                       ? imm->inline_value()
                       : imm->indexed_value();
       CHECK_EQ(value, constraint->value_);
       return;
     }
     case kRegister:
       CHECK(op->IsRegister());
       return;
-    case kFixedRegister:
-      CHECK(op->IsRegister());
-      CHECK_EQ(RegisterOperand::cast(op)->GetDoubleRegister().code(),
-               constraint->value_);
-      return;
     case kDoubleRegister:
       CHECK(op->IsDoubleRegister());
       return;
+    case kExplicit:
+      CHECK(op->IsExplicit());
+      return;
+    case kFixedRegister:
+      CHECK(op->IsRegister());
+      CHECK_EQ(LocationOperand::cast(op)->GetRegister().code(),
+               constraint->value_);
+      return;
     case kFixedDoubleRegister:
       CHECK(op->IsDoubleRegister());
-      CHECK_EQ(DoubleRegisterOperand::cast(op)->GetDoubleRegister().code(),
+      CHECK_EQ(LocationOperand::cast(op)->GetDoubleRegister().code(),
                constraint->value_);
       return;
     case kFixedSlot:
       CHECK(op->IsStackSlot());
-      CHECK_EQ(StackSlotOperand::cast(op)->index(), constraint->value_);
+      CHECK_EQ(LocationOperand::cast(op)->index(), constraint->value_);
       return;
     case kSlot:
       CHECK(op->IsStackSlot());
       return;
     case kDoubleSlot:
       CHECK(op->IsDoubleStackSlot());
       return;
     case kNone:
       CHECK(op->IsRegister() || op->IsStackSlot());
       return;
@@ skipping 32 matching lines @@
 };
 
 class PhiMap : public ZoneMap<int, PhiData*>, public ZoneObject {
  public:
   explicit PhiMap(Zone* zone) : ZoneMap<int, PhiData*>(zone) {}
 };
 
 struct OperandLess {
   bool operator()(const InstructionOperand* a,
                   const InstructionOperand* b) const {
-    return a->CompareModuloType(*b);
+    return a->CompareCanonicalizeType(*b);
   }
 };
 
 class OperandMap : public ZoneObject {
  public:
   struct MapValue : public ZoneObject {
     MapValue()
         : incoming(nullptr),
           define_vreg(kInvalidVreg),
           use_vreg(kInvalidVreg),
@@ skipping 13 matching lines @@
     // Remove all entries with keys not in other.
     void Intersect(const Map& other) {
       if (this->empty()) return;
       auto it = this->begin();
       OperandLess less;
       for (const auto& o : other) {
         while (less(it->first, o.first)) {
           this->erase(it++);
           if (it == this->end()) return;
         }
-        if (it->first->EqualsModuloType(*o.first)) {
+        if (it->first->EqualsCanonicalizeType(*o.first)) {
           ++it;
           if (it == this->end()) return;
         } else {
           CHECK(less(o.first, it->first));
         }
       }
     }
   };
 
   explicit OperandMap(Zone* zone) : map_(zone) {}
@@ skipping 339 matching lines @@
     auto current = block_maps->InitializeIncoming(block_index, initial_pass);
     const auto block = sequence()->instruction_blocks()[block_index];
     for (int instr_index = block->code_start(); instr_index < block->code_end();
          ++instr_index) {
       const auto& instr_constraint = constraints_[instr_index];
       const auto instr = instr_constraint.instruction_;
       current->RunGaps(zone(), instr);
       const auto op_constraints = instr_constraint.operand_constraints_;
       size_t count = 0;
       for (size_t i = 0; i < instr->InputCount(); ++i, ++count) {
-        if (op_constraints[count].type_ == kImmediate) continue;
+        if (op_constraints[count].type_ == kImmediate ||
+            op_constraints[count].type_ == kExplicit) {
+          continue;
+        }
         int virtual_register = op_constraints[count].virtual_register_;
         auto op = instr->InputAt(i);
         if (!block_maps->IsPhi(virtual_register)) {
           current->Use(op, virtual_register, initial_pass);
         } else {
           auto phi = block_maps->GetPhi(virtual_register);
           current->UsePhi(op, phi, initial_pass);
         }
       }
       for (size_t i = 0; i < instr->TempCount(); ++i, ++count) {
         current->Drop(instr->TempAt(i));
       }
       if (instr->IsCall()) {
         current->DropRegisters(config());
       }
       for (size_t i = 0; i < instr->OutputCount(); ++i, ++count) {
         int virtual_register = op_constraints[count].virtual_register_;
         current->Define(zone(), instr->OutputAt(i), virtual_register);
       }
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8