1/*
2 * Copyright (C) 2015-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "B3StackmapGenerationParams.h"
28
29#if ENABLE(B3_JIT)
30
31#include "AirCode.h"
32#include "AirGenerationContext.h"
33#include "B3StackmapValue.h"
34
35namespace JSC { namespace B3 {
36
37const RegisterSet& StackmapGenerationParams::usedRegisters() const
38{
39 ASSERT(m_context.code->needsUsedRegisters());
40
41 return m_value->m_usedRegisters;
42}
43
44RegisterSet StackmapGenerationParams::unavailableRegisters() const
45{
46 RegisterSet result = usedRegisters();
47
48 RegisterSet unsavedCalleeSaves = RegisterSet::vmCalleeSaveRegisters();
49 unsavedCalleeSaves.exclude(m_context.code->calleeSaveRegisters());
50
51 result.merge(unsavedCalleeSaves);
52
53 for (GPRReg gpr : m_gpScratch)
54 result.clear(gpr);
55 for (FPRReg fpr : m_fpScratch)
56 result.clear(fpr);
57
58 return result;
59}
60
61Vector<Box<CCallHelpers::Label>> StackmapGenerationParams::successorLabels() const
62{
63 RELEASE_ASSERT(m_context.indexInBlock == m_context.currentBlock->size() - 1);
64 RELEASE_ASSERT(m_value->effects().terminal);
65
66 Vector<Box<CCallHelpers::Label>> result(m_context.currentBlock->numSuccessors());
67 for (unsigned i = m_context.currentBlock->numSuccessors(); i--;)
68 result[i] = m_context.blockLabels[m_context.currentBlock->successorBlock(i)];
69 return result;
70}
71
72bool StackmapGenerationParams::fallsThroughToSuccessor(unsigned successorIndex) const
73{
74 RELEASE_ASSERT(m_context.indexInBlock == m_context.currentBlock->size() - 1);
75 RELEASE_ASSERT(m_value->effects().terminal);
76
77 Air::BasicBlock* successor = m_context.currentBlock->successorBlock(successorIndex);
78 Air::BasicBlock* nextBlock = m_context.code->findNextBlock(m_context.currentBlock);
79 return successor == nextBlock;
80}
81
82Procedure& StackmapGenerationParams::proc() const
83{
84 return m_context.code->proc();
85}
86
87StackmapGenerationParams::StackmapGenerationParams(
88 StackmapValue* value, const Vector<ValueRep>& reps, Air::GenerationContext& context)
89 : m_value(value)
90 , m_reps(reps)
91 , m_context(context)
92{
93}
94
95} } // namespace JSC::B3
96
97#endif // ENABLE(B3_JIT)
98
99