src/ic/mips/ic-compiler-mips.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/v8.h"

#if V8_TARGET_ARCH_MIPS

#include "src/ic/ic.h"
#include "src/ic/ic-compiler.h"

namespace v8 {
namespace internal {

#define __ ACCESS_MASM(masm())


Handle<Code> PropertyICCompiler::CompilePolymorphic(TypeHandleList* types,
                                                    CodeHandleList* handlers,
                                                    Handle<Name> name,
                                                    Code::StubType type,
                                                    IcCheckType check) {
  Label miss;

  if (check == PROPERTY &&
      (kind() == Code::KEYED_LOAD_IC || kind() == Code::KEYED_STORE_IC)) {
    // In case we are compiling an IC for dictionary loads or stores, just
    // check whether the name is unique.
    if (name.is_identical_to(isolate()->factory()->normal_ic_symbol())) {
      // Keyed loads with dictionaries shouldn't be here, they go generic.
      // The DCHECK is to protect assumptions when --vector-ics is on.
      DCHECK(kind() != Code::KEYED_LOAD_IC);
      Register tmp = scratch1();
      __ JumpIfSmi(this->name(), &miss);
      __ lw(tmp, FieldMemOperand(this->name(), HeapObject::kMapOffset));
      __ lbu(tmp, FieldMemOperand(tmp, Map::kInstanceTypeOffset));
      __ JumpIfNotUniqueNameInstanceType(tmp, &miss);
    } else {
      __ Branch(&miss, ne, this->name(), Operand(name));
    }
  }

  Label number_case;
  Register match = scratch2();
  Label* smi_target = IncludesNumberType(types) ? &number_case : &miss;
  __ JumpIfSmi(receiver(), smi_target, match);  // Reg match is 0 if Smi.

  // Polymorphic keyed stores may use the map register
  Register map_reg = scratch1();
  DCHECK(kind() != Code::KEYED_STORE_IC ||
         map_reg.is(ElementTransitionAndStoreDescriptor::MapRegister()));

  int receiver_count = types->length();
  int number_of_handled_maps = 0;
  __ lw(map_reg, FieldMemOperand(receiver(), HeapObject::kMapOffset));
  for (int current = 0; current < receiver_count; ++current) {
    Handle<HeapType> type = types->at(current);
    Handle<Map> map = IC::TypeToMap(*type, isolate());
    if (!map->is_deprecated()) {
      number_of_handled_maps++;
      // Check map and tail call if there's a match.
      // Separate compare from branch, to provide path for above JumpIfSmi().
      Handle<WeakCell> cell = Map::WeakCellForMap(map);
      __ GetWeakValue(match, cell);
      __ Subu(match, match, Operand(map_reg));
      if (type->Is(HeapType::Number())) {
        DCHECK(!number_case.is_unused());
        __ bind(&number_case);
      }
      __ Jump(handlers->at(current), RelocInfo::CODE_TARGET, eq, match,
              Operand(zero_reg));
    }
  }
  DCHECK(number_of_handled_maps != 0);

  __ bind(&miss);
  TailCallBuiltin(masm(), MissBuiltin(kind()));

  // Return the generated code.
  InlineCacheState state =
      number_of_handled_maps > 1 ? POLYMORPHIC : MONOMORPHIC;
  return GetCode(kind(), type, name, state);
}


Handle<Code> PropertyICCompiler::CompileKeyedStorePolymorphic(
    MapHandleList* receiver_maps, CodeHandleList* handler_stubs,
    MapHandleList* transitioned_maps) {
  Label miss;
  __ JumpIfSmi(receiver(), &miss);

  int receiver_count = receiver_maps->length();
  Register map_reg = scratch1();
  Register match = scratch2();
  __ lw(map_reg, FieldMemOperand(receiver(), HeapObject::kMapOffset));
  for (int i = 0; i < receiver_count; ++i) {
    Handle<WeakCell> cell = Map::WeakCellForMap(receiver_maps->at(i));
    __ GetWeakValue(match, cell);
    if (transitioned_maps->at(i).is_null()) {
      __ Jump(handler_stubs->at(i), RelocInfo::CODE_TARGET, eq, match,
              Operand(map_reg));
    } else {
      Label next_map;
      __ Branch(&next_map, ne, match, Operand(map_reg));
      Handle<WeakCell> cell = Map::WeakCellForMap(transitioned_maps->at(i));
      __ LoadWeakValue(transition_map(), cell, &miss);
      __ Jump(handler_stubs->at(i), RelocInfo::CODE_TARGET);
      __ bind(&next_map);
    }
  }

  __ bind(&miss);
  TailCallBuiltin(masm(), MissBuiltin(kind()));

  // Return the generated code.
  return GetCode(kind(), Code::NORMAL, factory()->empty_string(), POLYMORPHIC);
}


#undef __
#define __ ACCESS_MASM(masm)


void PropertyICCompiler::GenerateRuntimeSetProperty(MacroAssembler* masm,
                                                    StrictMode strict_mode) {
  __ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(),
          StoreDescriptor::ValueRegister());

  __ li(a0, Operand(Smi::FromInt(strict_mode)));
  __ Push(a0);

  // Do tail-call to runtime routine.
  __ TailCallRuntime(Runtime::kSetProperty, 4, 1);
}


#undef __
}
}  // namespace v8::internal

#endif  // V8_TARGET_ARCH_MIPS