ARM: Make use of d16-d31 when available.

src/lithium-allocator.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 633 matching lines @@
     result = new(zone_) LiveRange(FixedLiveRangeID(index), zone_);
     ASSERT(result->IsFixed());
     result->set_assigned_register(index, GENERAL_REGISTERS, zone_);
     fixed_live_ranges_[index] = result;
   }
   return result;
 }
 
 
 LiveRange* LAllocator::FixedDoubleLiveRangeFor(int index) {
-  ASSERT(index < DoubleRegister::kNumAllocatableRegisters);
+  ASSERT(index < DoubleRegister::NumAllocatableRegisters());
   LiveRange* result = fixed_double_live_ranges_[index];
   if (result == NULL) {
     result = new(zone_) LiveRange(FixedDoubleLiveRangeID(index), zone_);
     ASSERT(result->IsFixed());
     result->set_assigned_register(index, DOUBLE_REGISTERS, zone_);
     fixed_double_live_ranges_[index] = result;
   }
   return result;
 }
 
@@ skipping 287 matching lines @@
                 output->index() != i) {
               LiveRange* range = FixedLiveRangeFor(i);
               range->AddUseInterval(curr_position,
                                     curr_position.InstructionEnd(),
                                     zone_);
             }
           }
         }
 
         if (instr->IsMarkedAsCall()) {
-          for (int i = 0; i < DoubleRegister::kNumAllocatableRegisters; ++i) {
+          for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); ++i) {
             if (output == NULL || !output->IsDoubleRegister() ||
                 output->index() != i) {
               LiveRange* range = FixedDoubleLiveRangeFor(i);
               range->AddUseInterval(curr_position,
                                     curr_position.InstructionEnd(),
                                     zone_);
             }
           }
         }
 
@@ skipping 498 matching lines @@
 
 void LAllocator::AllocateGeneralRegisters() {
   HPhase phase("L_Allocate general registers", this);
   num_registers_ = Register::kNumAllocatableRegisters;
   AllocateRegisters();
 }
 
 
 void LAllocator::AllocateDoubleRegisters() {
   HPhase phase("L_Allocate double registers", this);
-  num_registers_ = DoubleRegister::kNumAllocatableRegisters;
+  num_registers_ = DoubleRegister::NumAllocatableRegisters();
   mode_ = DOUBLE_REGISTERS;
   AllocateRegisters();
 }
 
 
 void LAllocator::AllocateRegisters() {
   ASSERT(unhandled_live_ranges_.is_empty());
 
   for (int i = 0; i < live_ranges_.length(); ++i) {
     if (live_ranges_[i] != NULL) {
       if (RequiredRegisterKind(live_ranges_[i]->id()) == mode_) {
         AddToUnhandledUnsorted(live_ranges_[i]);
       }
     }
   }
   SortUnhandled();
   ASSERT(UnhandledIsSorted());
 
   ASSERT(reusable_slots_.is_empty());
   ASSERT(active_live_ranges_.is_empty());
   ASSERT(inactive_live_ranges_.is_empty());
 
   if (mode_ == DOUBLE_REGISTERS) {
-    for (int i = 0; i < fixed_double_live_ranges_.length(); ++i) {
+    for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); ++i) {
       LiveRange* current = fixed_double_live_ranges_.at(i);
       if (current != NULL) {
         AddToInactive(current);
       }
     }
   } else {
     for (int i = 0; i < fixed_live_ranges_.length(); ++i) {
       LiveRange* current = fixed_live_ranges_.at(i);
       if (current != NULL) {
         AddToInactive(current);
@@ skipping 232 matching lines @@
 
 
 void LAllocator::InactiveToActive(LiveRange* range) {
   ASSERT(inactive_live_ranges_.Contains(range));
   inactive_live_ranges_.RemoveElement(range);
   active_live_ranges_.Add(range, zone());
   TraceAlloc("Moving live range %d from inactive to active\n", range->id());
 }
 
 
-// TryAllocateFreeReg and AllocateBlockedReg assume this
-// when allocating local arrays.
-STATIC_ASSERT(DoubleRegister::kNumAllocatableRegisters >=
-              Register::kNumAllocatableRegisters);
+bool LAllocator::TryAllocateFreeReg(LiveRange* current) {
+  ASSERT(DoubleRegister::NumAllocatableRegisters() >=
+         Register::kNumAllocatableRegisters);
+  LifetimePosition free_until_pos[DoubleRegister::kNumRegisters];
 
-
-bool LAllocator::TryAllocateFreeReg(LiveRange* current) {
-  LifetimePosition free_until_pos[DoubleRegister::kNumAllocatableRegisters];
-
-  for (int i = 0; i < DoubleRegister::kNumAllocatableRegisters; i++) {
+  for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); i++) {
     free_until_pos[i] = LifetimePosition::MaxPosition();
   }
 
   for (int i = 0; i < active_live_ranges_.length(); ++i) {
     LiveRange* cur_active = active_live_ranges_.at(i);
     free_until_pos[cur_active->assigned_register()] =
         LifetimePosition::FromInstructionIndex(0);
   }
 
   for (int i = 0; i < inactive_live_ranges_.length(); ++i) {
@@ skipping 59 matching lines @@
   TraceAlloc("Assigning free reg %s to live range %d\n",
              RegisterName(reg),
              current->id());
   current->set_assigned_register(reg, mode_, zone_);
 
   return true;
 }
 
 
 void LAllocator::AllocateBlockedReg(LiveRange* current) {
+  ASSERT(DoubleRegister::NumAllocatableRegisters() >=
+         Register::kNumAllocatableRegisters);
   UsePosition* register_use = current->NextRegisterPosition(current->Start());
   if (register_use == NULL) {
     // There is no use in the current live range that requires a register.
     // We can just spill it.
     Spill(current);
     return;
   }
 
 
-  LifetimePosition use_pos[DoubleRegister::kNumAllocatableRegisters];
-  LifetimePosition block_pos[DoubleRegister::kNumAllocatableRegisters];
+  LifetimePosition use_pos[DoubleRegister::kNumRegisters];
+  LifetimePosition block_pos[DoubleRegister::kNumRegisters];
 
-  for (int i = 0; i < DoubleRegister::kNumAllocatableRegisters; i++) {
+  for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); i++) {
     use_pos[i] = block_pos[i] = LifetimePosition::MaxPosition();
   }
 
   for (int i = 0; i < active_live_ranges_.length(); ++i) {
     LiveRange* range = active_live_ranges_[i];
     int cur_reg = range->assigned_register();
     if (range->IsFixed() || !range->CanBeSpilled(current->Start())) {
       block_pos[cur_reg] = use_pos[cur_reg] =
           LifetimePosition::FromInstructionIndex(0);
     } else {
@@ skipping 240 matching lines @@
     LiveRange* current = live_ranges()->at(i);
     if (current != NULL) current->Verify();
   }
 }
 
 
 #endif
 
 
 } }  // namespace v8::internal