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 <type_traits>
20
21 #include "nodes.h"
22 #include "code_generator.h"
23
24 namespace art {
25
26 // Verify that Location is trivially copyable.
27 static_assert(std::is_trivially_copyable<Location>::value, "Location should be trivially copyable");
28
LocationSummary(HInstruction * instruction,CallKind call_kind,bool intrinsified)29 LocationSummary::LocationSummary(HInstruction* instruction,
30 CallKind call_kind,
31 bool intrinsified)
32 : inputs_(instruction->InputCount(),
33 instruction->GetBlock()->GetGraph()->GetArena()->Adapter(kArenaAllocLocationSummary)),
34 temps_(instruction->GetBlock()->GetGraph()->GetArena()->Adapter(kArenaAllocLocationSummary)),
35 call_kind_(call_kind),
36 intrinsified_(intrinsified),
37 has_custom_slow_path_calling_convention_(false),
38 output_overlaps_(Location::kOutputOverlap),
39 stack_mask_(nullptr),
40 register_mask_(0),
41 live_registers_(RegisterSet::Empty()),
42 custom_slow_path_caller_saves_(RegisterSet::Empty()) {
43 instruction->SetLocations(this);
44
45 if (NeedsSafepoint()) {
46 ArenaAllocator* arena = instruction->GetBlock()->GetGraph()->GetArena();
47 stack_mask_ = ArenaBitVector::Create(arena, 0, true, kArenaAllocLocationSummary);
48 }
49 }
50
51
RegisterOrConstant(HInstruction * instruction)52 Location Location::RegisterOrConstant(HInstruction* instruction) {
53 return instruction->IsConstant()
54 ? Location::ConstantLocation(instruction->AsConstant())
55 : Location::RequiresRegister();
56 }
57
RegisterOrInt32Constant(HInstruction * instruction)58 Location Location::RegisterOrInt32Constant(HInstruction* instruction) {
59 HConstant* constant = instruction->AsConstant();
60 if (constant != nullptr) {
61 int64_t value = CodeGenerator::GetInt64ValueOf(constant);
62 if (IsInt<32>(value)) {
63 return Location::ConstantLocation(constant);
64 }
65 }
66 return Location::RequiresRegister();
67 }
68
FpuRegisterOrInt32Constant(HInstruction * instruction)69 Location Location::FpuRegisterOrInt32Constant(HInstruction* instruction) {
70 HConstant* constant = instruction->AsConstant();
71 if (constant != nullptr) {
72 int64_t value = CodeGenerator::GetInt64ValueOf(constant);
73 if (IsInt<32>(value)) {
74 return Location::ConstantLocation(constant);
75 }
76 }
77 return Location::RequiresFpuRegister();
78 }
79
ByteRegisterOrConstant(int reg,HInstruction * instruction)80 Location Location::ByteRegisterOrConstant(int reg, HInstruction* instruction) {
81 return instruction->IsConstant()
82 ? Location::ConstantLocation(instruction->AsConstant())
83 : Location::RegisterLocation(reg);
84 }
85
FpuRegisterOrConstant(HInstruction * instruction)86 Location Location::FpuRegisterOrConstant(HInstruction* instruction) {
87 return instruction->IsConstant()
88 ? Location::ConstantLocation(instruction->AsConstant())
89 : Location::RequiresFpuRegister();
90 }
91
operator <<(std::ostream & os,const Location & location)92 std::ostream& operator<<(std::ostream& os, const Location& location) {
93 os << location.DebugString();
94 if (location.IsRegister() || location.IsFpuRegister()) {
95 os << location.reg();
96 } else if (location.IsPair()) {
97 os << location.low() << ":" << location.high();
98 } else if (location.IsStackSlot() || location.IsDoubleStackSlot()) {
99 os << location.GetStackIndex();
100 }
101 return os;
102 }
103
104 } // namespace art
105