1// Copyright 2011 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28#ifndef V8_LITHIUM_ALLOCATOR_INL_H_
29#define V8_LITHIUM_ALLOCATOR_INL_H_
30
31#include "lithium-allocator.h"
32
33#if V8_TARGET_ARCH_IA32
34#include "ia32/lithium-ia32.h"
35#elif V8_TARGET_ARCH_X64
36#include "x64/lithium-x64.h"
37#elif V8_TARGET_ARCH_ARM
38#include "arm/lithium-arm.h"
39#elif V8_TARGET_ARCH_MIPS
40#include "mips/lithium-mips.h"
41#else
42#error "Unknown architecture."
43#endif
44
45namespace v8 {
46namespace internal {
47
48bool LAllocator::IsGapAt(int index) { return chunk_->IsGapAt(index); }
49
50
51LInstruction* LAllocator::InstructionAt(int index) {
52  return chunk_->instructions()->at(index);
53}
54
55
56LGap* LAllocator::GapAt(int index) {
57  return chunk_->GetGapAt(index);
58}
59
60
61TempIterator::TempIterator(LInstruction* instr)
62    : instr_(instr),
63      limit_(instr->TempCount()),
64      current_(0) {
65  SkipUninteresting();
66}
67
68
69bool TempIterator::Done() { return current_ >= limit_; }
70
71
72LOperand* TempIterator::Current() {
73  ASSERT(!Done());
74  return instr_->TempAt(current_);
75}
76
77
78void TempIterator::SkipUninteresting() {
79  while (current_ < limit_ && instr_->TempAt(current_) == NULL) ++current_;
80}
81
82
83void TempIterator::Advance() {
84  ++current_;
85  SkipUninteresting();
86}
87
88
89InputIterator::InputIterator(LInstruction* instr)
90    : instr_(instr),
91      limit_(instr->InputCount()),
92      current_(0) {
93  SkipUninteresting();
94}
95
96
97bool InputIterator::Done() { return current_ >= limit_; }
98
99
100LOperand* InputIterator::Current() {
101  ASSERT(!Done());
102  return instr_->InputAt(current_);
103}
104
105
106void InputIterator::Advance() {
107  ++current_;
108  SkipUninteresting();
109}
110
111
112void InputIterator::SkipUninteresting() {
113  while (current_ < limit_ && instr_->InputAt(current_)->IsConstantOperand()) {
114    ++current_;
115  }
116}
117
118
119UseIterator::UseIterator(LInstruction* instr)
120    : input_iterator_(instr), env_iterator_(instr->environment()) { }
121
122
123bool UseIterator::Done() {
124  return input_iterator_.Done() && env_iterator_.Done();
125}
126
127
128LOperand* UseIterator::Current() {
129  ASSERT(!Done());
130  return input_iterator_.Done()
131      ? env_iterator_.Current()
132      : input_iterator_.Current();
133}
134
135
136void UseIterator::Advance() {
137  input_iterator_.Done()
138      ? env_iterator_.Advance()
139      : input_iterator_.Advance();
140}
141
142} }  // namespace v8::internal
143
144#endif  // V8_LITHIUM_ALLOCATOR_INL_H_
145