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
21 namespace art {
22
LocationSummary(HInstruction * instruction,CallKind call_kind,bool intrinsified)23 LocationSummary::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
RegisterOrConstant(HInstruction * instruction)47 Location Location::RegisterOrConstant(HInstruction* instruction) {
48 return instruction->IsConstant()
49 ? Location::ConstantLocation(instruction->AsConstant())
50 : Location::RequiresRegister();
51 }
52
RegisterOrInt32LongConstant(HInstruction * instruction)53 Location 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
ByteRegisterOrConstant(int reg,HInstruction * instruction)66 Location Location::ByteRegisterOrConstant(int reg, HInstruction* instruction) {
67 return instruction->IsConstant()
68 ? Location::ConstantLocation(instruction->AsConstant())
69 : Location::RegisterLocation(reg);
70 }
71
operator <<(std::ostream & os,const Location & location)72 std::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