1  /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "locations.h"
18
19#include "nodes.h"
20
21namespace art {
22
23LocationSummary::LocationSummary(HInstruction* instruction,
24                                 CallKind call_kind,
25                                 bool intrinsified)
26    : inputs_(instruction->GetBlock()->GetGraph()->GetArena(), instruction->InputCount()),
27      temps_(instruction->GetBlock()->GetGraph()->GetArena(), 0),
28      output_overlaps_(Location::kOutputOverlap),
29      call_kind_(call_kind),
30      stack_mask_(nullptr),
31      register_mask_(0),
32      live_registers_(),
33      intrinsified_(intrinsified) {
34  inputs_.SetSize(instruction->InputCount());
35  for (size_t i = 0; i < instruction->InputCount(); ++i) {
36    inputs_.Put(i, Location());
37  }
38  instruction->SetLocations(this);
39
40  if (NeedsSafepoint()) {
41    ArenaAllocator* arena = instruction->GetBlock()->GetGraph()->GetArena();
42    stack_mask_ = new (arena) ArenaBitVector(arena, 0, true);
43  }
44}
45
46
47Location Location::RegisterOrConstant(HInstruction* instruction) {
48  return instruction->IsConstant()
49      ? Location::ConstantLocation(instruction->AsConstant())
50      : Location::RequiresRegister();
51}
52
53Location Location::RegisterOrInt32LongConstant(HInstruction* instruction) {
54  if (!instruction->IsConstant() || !instruction->AsConstant()->IsLongConstant()) {
55    return Location::RequiresRegister();
56  }
57
58  // Does the long constant fit in a 32 bit int?
59  int64_t value = instruction->AsConstant()->AsLongConstant()->GetValue();
60
61  return IsInt<32>(value)
62      ? Location::ConstantLocation(instruction->AsConstant())
63      : Location::RequiresRegister();
64}
65
66Location Location::ByteRegisterOrConstant(int reg, HInstruction* instruction) {
67  return instruction->IsConstant()
68      ? Location::ConstantLocation(instruction->AsConstant())
69      : Location::RegisterLocation(reg);
70}
71
72std::ostream& operator<<(std::ostream& os, const Location& location) {
73  os << location.DebugString();
74  if (location.IsRegister() || location.IsFpuRegister()) {
75    os << location.reg();
76  } else if (location.IsPair()) {
77    os << location.low() << ":" << location.high();
78  } else if (location.IsStackSlot() || location.IsDoubleStackSlot()) {
79    os << location.GetStackIndex();
80  }
81  return os;
82}
83
84}  // namespace art
85