nodes_x86.h revision cf8d1bb97e193e02b430d707d3b669565fababb4 
1/*
2 * Copyright (C) 2015 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#ifndef ART_COMPILER_OPTIMIZING_NODES_X86_H_
18#define ART_COMPILER_OPTIMIZING_NODES_X86_H_
19
20namespace art {
21
22// Compute the address of the method for X86 Constant area support.
23class HX86ComputeBaseMethodAddress : public HExpression<0> {
24 public:
25  // Treat the value as an int32_t, but it is really a 32 bit native pointer.
26  HX86ComputeBaseMethodAddress()
27      : HExpression(Primitive::kPrimInt, SideEffects::None(), kNoDexPc) {}
28
29  DECLARE_INSTRUCTION(X86ComputeBaseMethodAddress);
30
31 private:
32  DISALLOW_COPY_AND_ASSIGN(HX86ComputeBaseMethodAddress);
33};
34
35// Load a constant value from the constant table.
36class HX86LoadFromConstantTable : public HExpression<2> {
37 public:
38  HX86LoadFromConstantTable(HX86ComputeBaseMethodAddress* method_base,
39                            HConstant* constant,
40                            bool needs_materialization = true)
41      : HExpression(constant->GetType(), SideEffects::None(), kNoDexPc),
42        needs_materialization_(needs_materialization) {
43    SetRawInputAt(0, method_base);
44    SetRawInputAt(1, constant);
45  }
46
47  bool NeedsMaterialization() const { return needs_materialization_; }
48
49  HX86ComputeBaseMethodAddress* GetBaseMethodAddress() const {
50    return InputAt(0)->AsX86ComputeBaseMethodAddress();
51  }
52
53  HConstant* GetConstant() const {
54    return InputAt(1)->AsConstant();
55  }
56
57  DECLARE_INSTRUCTION(X86LoadFromConstantTable);
58
59 private:
60  const bool needs_materialization_;
61
62  DISALLOW_COPY_AND_ASSIGN(HX86LoadFromConstantTable);
63};
64
65// X86 version of HPackedSwitch that holds a pointer to the base method address.
66class HX86PackedSwitch : public HTemplateInstruction<2> {
67 public:
68  HX86PackedSwitch(int32_t start_value,
69                   int32_t num_entries,
70                   HInstruction* input,
71                   HX86ComputeBaseMethodAddress* method_base,
72                   uint32_t dex_pc)
73    : HTemplateInstruction(SideEffects::None(), dex_pc),
74      start_value_(start_value),
75      num_entries_(num_entries) {
76    SetRawInputAt(0, input);
77    SetRawInputAt(1, method_base);
78  }
79
80  bool IsControlFlow() const OVERRIDE { return true; }
81
82  int32_t GetStartValue() const { return start_value_; }
83
84  int32_t GetNumEntries() const { return num_entries_; }
85
86  HX86ComputeBaseMethodAddress* GetBaseMethodAddress() const {
87    return InputAt(1)->AsX86ComputeBaseMethodAddress();
88  }
89
90  HBasicBlock* GetDefaultBlock() const {
91    // Last entry is the default block.
92    return GetBlock()->GetSuccessors()[num_entries_];
93  }
94
95  DECLARE_INSTRUCTION(X86PackedSwitch);
96
97 private:
98  const int32_t start_value_;
99  const int32_t num_entries_;
100
101  DISALLOW_COPY_AND_ASSIGN(HX86PackedSwitch);
102};
103
104}  // namespace art
105
106#endif  // ART_COMPILER_OPTIMIZING_NODES_X86_H_
107