Turbofan: Rename UnallocatedOperand policies from '*DOUBLE*' to '*FP*'.

- Renames UnallocatedOperandenum values to reflect the fact that there are
multiple FP machine representations.
- Renames enum values for RegisterAllocatorVerifier enum.
- Template-izes DefineAsFixed and UseFixed methods to handle multiple FP
register types.

BUG=v8:4124

Review-Url: https://codereview.chromium.org/2017733002
Cr-Commit-Position: refs/heads/master@{#36558}

src/compiler/instruction-scheduler.h

@@ -177,12 +177,12 @@ class InstructionScheduler final : public ZoneObject {
   // Identify nops used as a definition point for live-in registers at
   // function entry.
   bool IsFixedRegisterParameter(const Instruction* instr) const {
-    return (instr->arch_opcode() == kArchNop) &&
-      (instr->OutputCount() == 1) &&
-      (instr->OutputAt(0)->IsUnallocated()) &&
-      (UnallocatedOperand::cast(instr->OutputAt(0))->HasFixedRegisterPolicy() ||
-       UnallocatedOperand::cast(
-           instr->OutputAt(0))->HasFixedDoubleRegisterPolicy());
+    return (instr->arch_opcode() == kArchNop) && (instr->OutputCount() == 1) &&
+           (instr->OutputAt(0)->IsUnallocated()) &&
+           (UnallocatedOperand::cast(instr->OutputAt(0))
+                ->HasFixedRegisterPolicy() ||
+            UnallocatedOperand::cast(instr->OutputAt(0))
+                ->HasFixedFPRegisterPolicy());
   }
 
   void ComputeTotalLatencies();

src/compiler/instruction-selector-impl.h

@@ -54,9 +54,10 @@ class OperandGenerator {
                                            reg.code(), GetVReg(node)));
   }
 
-  InstructionOperand DefineAsFixed(Node* node, DoubleRegister reg) {
+  template <typename FPRegType>
+  InstructionOperand DefineAsFixed(Node* node, FPRegType reg) {
     return Define(node,
-                  UnallocatedOperand(UnallocatedOperand::FIXED_DOUBLE_REGISTER,
+                  UnallocatedOperand(UnallocatedOperand::FIXED_FP_REGISTER,
                                      reg.code(), GetVReg(node)));
   }
 
@@ -122,10 +123,10 @@ class OperandGenerator {
                                         reg.code(), GetVReg(node)));
   }
 
-  InstructionOperand UseFixed(Node* node, DoubleRegister reg) {
-    return Use(node,
-               UnallocatedOperand(UnallocatedOperand::FIXED_DOUBLE_REGISTER,
-                                  reg.code(), GetVReg(node)));
+  template <typename FPRegType>
+  InstructionOperand UseFixed(Node* node, FPRegType reg) {
+    return Use(node, UnallocatedOperand(UnallocatedOperand::FIXED_FP_REGISTER,
+                                        reg.code(), GetVReg(node)));
   }
 
   InstructionOperand UseExplicit(LinkageLocation location) {
@@ -274,7 +275,7 @@ class OperandGenerator {
     }
     // a fixed register.
     if (IsFloatingPoint(rep)) {
-      return UnallocatedOperand(UnallocatedOperand::FIXED_DOUBLE_REGISTER,
+      return UnallocatedOperand(UnallocatedOperand::FIXED_FP_REGISTER,
                                 location.AsRegister(), virtual_register);
     }
     return UnallocatedOperand(UnallocatedOperand::FIXED_REGISTER,

src/compiler/instruction.cc

@@ -95,7 +95,7 @@ std::ostream& operator<<(std::ostream& os,
                     << conf->GetGeneralRegisterName(
                            unalloc->fixed_register_index())
                     << ")";
-        case UnallocatedOperand::FIXED_DOUBLE_REGISTER:
+        case UnallocatedOperand::FIXED_FP_REGISTER:
           return os << "(="
                     << conf->GetDoubleRegisterName(
                            unalloc->fixed_register_index())

src/compiler/instruction.h

@@ -155,7 +155,7 @@ class UnallocatedOperand : public InstructionOperand {
     NONE,
     ANY,
     FIXED_REGISTER,
-    FIXED_DOUBLE_REGISTER,
+    FIXED_FP_REGISTER,
     MUST_HAVE_REGISTER,
     MUST_HAVE_SLOT,
     SAME_AS_FIRST_INPUT
@@ -192,7 +192,7 @@ class UnallocatedOperand : public InstructionOperand {
 
   UnallocatedOperand(ExtendedPolicy policy, int index, int virtual_register)
       : UnallocatedOperand(virtual_register) {
-    DCHECK(policy == FIXED_REGISTER || policy == FIXED_DOUBLE_REGISTER);
+    DCHECK(policy == FIXED_REGISTER || policy == FIXED_FP_REGISTER);
     value_ |= BasicPolicyField::encode(EXTENDED_POLICY);
     value_ |= ExtendedPolicyField::encode(policy);
     value_ |= LifetimeField::encode(USED_AT_END);
@@ -220,7 +220,7 @@ class UnallocatedOperand : public InstructionOperand {
   bool HasFixedPolicy() const {
     return basic_policy() == FIXED_SLOT ||
            extended_policy() == FIXED_REGISTER ||
-           extended_policy() == FIXED_DOUBLE_REGISTER;
+           extended_policy() == FIXED_FP_REGISTER;
   }
   bool HasRegisterPolicy() const {
     return basic_policy() == EXTENDED_POLICY &&
@@ -239,9 +239,9 @@ class UnallocatedOperand : public InstructionOperand {
     return basic_policy() == EXTENDED_POLICY &&
            extended_policy() == FIXED_REGISTER;
   }
-  bool HasFixedDoubleRegisterPolicy() const {
+  bool HasFixedFPRegisterPolicy() const {
     return basic_policy() == EXTENDED_POLICY &&
-           extended_policy() == FIXED_DOUBLE_REGISTER;
+           extended_policy() == FIXED_FP_REGISTER;
   }
   bool HasSecondaryStorage() const {
     return basic_policy() == EXTENDED_POLICY &&
@@ -272,9 +272,9 @@ class UnallocatedOperand : public InstructionOperand {
                             FixedSlotIndexField::kShift);
   }
 
-  // [fixed_register_index]: Only for FIXED_REGISTER or FIXED_DOUBLE_REGISTER.
+  // [fixed_register_index]: Only for FIXED_REGISTER or FIXED_FP_REGISTER.
   int fixed_register_index() const {
-    DCHECK(HasFixedRegisterPolicy() || HasFixedDoubleRegisterPolicy());
+    DCHECK(HasFixedRegisterPolicy() || HasFixedFPRegisterPolicy());
     return FixedRegisterField::decode(value_);
   }
 
@@ -421,30 +421,31 @@ class LocationOperand : public InstructionOperand {
     return static_cast<int64_t>(value_) >> IndexField::kShift;
   }
 
+  int register_code() const {
+    DCHECK(IsRegister() || IsFPRegister());
+    return static_cast<int64_t>(value_) >> IndexField::kShift;
+  }
+
   Register GetRegister() const {
     DCHECK(IsRegister());
-    return Register::from_code(static_cast<int64_t>(value_) >>
-                               IndexField::kShift);
+    return Register::from_code(register_code());
   }
 
   FloatRegister GetFloatRegister() const {
     DCHECK(IsFloatRegister());
-    return FloatRegister::from_code(static_cast<int64_t>(value_) >>
-                                    IndexField::kShift);
+    return FloatRegister::from_code(register_code());
   }
 
   DoubleRegister GetDoubleRegister() const {
     // TODO(bbudge) Tighten this test to IsDoubleRegister when all code
     // generators are changed to use the correct Get*Register method.
     DCHECK(IsFPRegister());
-    return DoubleRegister::from_code(static_cast<int64_t>(value_) >>
-                                     IndexField::kShift);
+    return DoubleRegister::from_code(register_code());
   }
 
   Simd128Register GetSimd128Register() const {
     DCHECK(IsSimd128Register());
-    return Simd128Register::from_code(static_cast<int64_t>(value_) >>
-                                      IndexField::kShift);
+    return Simd128Register::from_code(register_code());
   }
 
   LocationKind location_kind() const {

src/compiler/register-allocator-verifier.cc

@@ -160,14 +160,14 @@ void RegisterAllocatorVerifier::BuildConstraint(const InstructionOperand* op,
     int vreg = unallocated->virtual_register();
     constraint->virtual_register_ = vreg;
     if (unallocated->basic_policy() == UnallocatedOperand::FIXED_SLOT) {
-      constraint->type_ = sequence()->IsFP(vreg) ? kDoubleSlot : kSlot;
+      constraint->type_ = sequence()->IsFP(vreg) ? kFPSlot : kSlot;
       constraint->value_ = unallocated->fixed_slot_index();
     } else {
       switch (unallocated->extended_policy()) {
         case UnallocatedOperand::ANY:
         case UnallocatedOperand::NONE:
           if (sequence()->IsFP(vreg)) {
-            constraint->type_ = kNoneDouble;
+            constraint->type_ = kNoneFP;
           } else {
             constraint->type_ = kNone;
           }
@@ -181,19 +181,19 @@ void RegisterAllocatorVerifier::BuildConstraint(const InstructionOperand* op,
           }
           constraint->value_ = unallocated->fixed_register_index();
           break;
-        case UnallocatedOperand::FIXED_DOUBLE_REGISTER:
-          constraint->type_ = kFixedDoubleRegister;
+        case UnallocatedOperand::FIXED_FP_REGISTER:
+          constraint->type_ = kFixedFPRegister;
           constraint->value_ = unallocated->fixed_register_index();
           break;
         case UnallocatedOperand::MUST_HAVE_REGISTER:
           if (sequence()->IsFP(vreg)) {
-            constraint->type_ = kDoubleRegister;
+            constraint->type_ = kFPRegister;
           } else {
             constraint->type_ = kRegister;
           }
           break;
         case UnallocatedOperand::MUST_HAVE_SLOT:
-          constraint->type_ = sequence()->IsFP(vreg) ? kDoubleSlot : kSlot;
+          constraint->type_ = sequence()->IsFP(vreg) ? kFPSlot : kSlot;
           break;
         case UnallocatedOperand::SAME_AS_FIRST_INPUT:
           constraint->type_ = kSameAsFirst;
@@ -223,7 +223,7 @@ void RegisterAllocatorVerifier::CheckConstraint(
     case kRegister:
       CHECK(op->IsRegister());
       return;
-    case kDoubleRegister:
+    case kFPRegister:
       CHECK(op->IsFPRegister());
       return;
     case kExplicit:
@@ -232,13 +232,11 @@ void RegisterAllocatorVerifier::CheckConstraint(
     case kFixedRegister:
     case kRegisterAndSlot:
       CHECK(op->IsRegister());
-      CHECK_EQ(LocationOperand::cast(op)->GetRegister().code(),
-               constraint->value_);
+      CHECK_EQ(LocationOperand::cast(op)->register_code(), constraint->value_);
       return;
-    case kFixedDoubleRegister:
+    case kFixedFPRegister:
       CHECK(op->IsFPRegister());
-      CHECK_EQ(LocationOperand::cast(op)->GetDoubleRegister().code(),
-               constraint->value_);
+      CHECK_EQ(LocationOperand::cast(op)->register_code(), constraint->value_);
       return;
     case kFixedSlot:
       CHECK(op->IsStackSlot());
@@ -247,13 +245,13 @@ void RegisterAllocatorVerifier::CheckConstraint(
     case kSlot:
       CHECK(op->IsStackSlot());
       return;
-    case kDoubleSlot:
+    case kFPSlot:
       CHECK(op->IsFPStackSlot());
       return;
     case kNone:
       CHECK(op->IsRegister() || op->IsStackSlot());
       return;
-    case kNoneDouble:
+    case kNoneFP:
       CHECK(op->IsFPRegister() || op->IsFPStackSlot());
       return;
     case kSameAsFirst:

src/compiler/register-allocator-verifier.h

@@ -175,13 +175,13 @@ class RegisterAllocatorVerifier final : public ZoneObject {
     kImmediate,
     kRegister,
     kFixedRegister,
-    kDoubleRegister,
-    kFixedDoubleRegister,
+    kFPRegister,
+    kFixedFPRegister,
     kSlot,
-    kDoubleSlot,
+    kFPSlot,
     kFixedSlot,
     kNone,
-    kNoneDouble,
+    kNoneFP,
     kExplicit,
     kSameAsFirst,
     kRegisterAndSlot

src/compiler/register-allocator.cc

@@ -1618,7 +1618,7 @@ InstructionOperand* ConstraintBuilder::AllocateFixed(
     DCHECK(!IsFloatingPoint(rep));
     allocated = AllocatedOperand(AllocatedOperand::REGISTER, rep,
                                  operand->fixed_register_index());
-  } else if (operand->HasFixedDoubleRegisterPolicy()) {
+  } else if (operand->HasFixedFPRegisterPolicy()) {
     DCHECK(IsFloatingPoint(rep));
     DCHECK_NE(InstructionOperand::kInvalidVirtualRegister, virtual_register);
     allocated = AllocatedOperand(AllocatedOperand::REGISTER, rep,