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 "code_generator.h"
22 #include "nodes.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,ArenaAllocator * allocator)29 LocationSummary::LocationSummary(HInstruction* instruction,
30 CallKind call_kind,
31 bool intrinsified,
32 ArenaAllocator* allocator)
33 : inputs_(instruction->InputCount(), allocator->Adapter(kArenaAllocLocationSummary)),
34 temps_(allocator->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 stack_mask_ = ArenaBitVector::Create(allocator, 0, true, kArenaAllocLocationSummary);
47 }
48 }
49
LocationSummary(HInstruction * instruction,CallKind call_kind,bool intrinsified)50 LocationSummary::LocationSummary(HInstruction* instruction,
51 CallKind call_kind,
52 bool intrinsified)
53 : LocationSummary(instruction,
54 call_kind,
55 intrinsified,
56 instruction->GetBlock()->GetGraph()->GetAllocator()) {}
57
RegisterOrConstant(HInstruction * instruction)58 Location Location::RegisterOrConstant(HInstruction* instruction) {
59 return instruction->IsConstant()
60 ? Location::ConstantLocation(instruction->AsConstant())
61 : Location::RequiresRegister();
62 }
63
RegisterOrInt32Constant(HInstruction * instruction)64 Location Location::RegisterOrInt32Constant(HInstruction* instruction) {
65 HConstant* constant = instruction->AsConstant();
66 if (constant != nullptr) {
67 int64_t value = CodeGenerator::GetInt64ValueOf(constant);
68 if (IsInt<32>(value)) {
69 return Location::ConstantLocation(constant);
70 }
71 }
72 return Location::RequiresRegister();
73 }
74
FpuRegisterOrInt32Constant(HInstruction * instruction)75 Location Location::FpuRegisterOrInt32Constant(HInstruction* instruction) {
76 HConstant* constant = instruction->AsConstant();
77 if (constant != nullptr) {
78 int64_t value = CodeGenerator::GetInt64ValueOf(constant);
79 if (IsInt<32>(value)) {
80 return Location::ConstantLocation(constant);
81 }
82 }
83 return Location::RequiresFpuRegister();
84 }
85
ByteRegisterOrConstant(int reg,HInstruction * instruction)86 Location Location::ByteRegisterOrConstant(int reg, HInstruction* instruction) {
87 return instruction->IsConstant()
88 ? Location::ConstantLocation(instruction->AsConstant())
89 : Location::RegisterLocation(reg);
90 }
91
FpuRegisterOrConstant(HInstruction * instruction)92 Location Location::FpuRegisterOrConstant(HInstruction* instruction) {
93 return instruction->IsConstant()
94 ? Location::ConstantLocation(instruction->AsConstant())
95 : Location::RequiresFpuRegister();
96 }
97
operator <<(std::ostream & os,const Location & location)98 std::ostream& operator<<(std::ostream& os, const Location& location) {
99 os << location.DebugString();
100 if (location.IsRegister() || location.IsFpuRegister()) {
101 os << location.reg();
102 } else if (location.IsPair()) {
103 os << location.low() << ":" << location.high();
104 } else if (location.IsStackSlot() || location.IsDoubleStackSlot()) {
105 os << location.GetStackIndex();
106 }
107 return os;
108 }
109
110 } // namespace art
111