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 "B3Procedure.h"
34#include "B3StackmapValue.h"
35
36namespace JSC { namespace B3 {
37
38const RegisterSet& StackmapGenerationParams::usedRegisters() const
39{
40 ASSERT(m_context.code->needsUsedRegisters());
41
42 return m_value->m_usedRegisters;
43}
44
45RegisterSet StackmapGenerationParams::unavailableRegisters() const
46{
47 RegisterSet result = usedRegisters();
48
49 RegisterSet unsavedCalleeSaves = RegisterSet::vmCalleeSaveRegisters();
50 unsavedCalleeSaves.exclude(m_context.code->calleeSaveRegisters());
51
52 result.merge(unsavedCalleeSaves);
53
54 for (GPRReg gpr : m_gpScratch)
55 result.clear(gpr);
56 for (FPRReg fpr : m_fpScratch)
57 result.clear(fpr);
58
59 return result;
60}
61
62Vector<Box<CCallHelpers::Label>> StackmapGenerationParams::successorLabels() const
63{
64 RELEASE_ASSERT(m_context.indexInBlock == m_context.currentBlock->size() - 1);
65 RELEASE_ASSERT(m_value->effects().terminal);
66
67 Vector<Box<CCallHelpers::Label>> result(m_context.currentBlock->numSuccessors());
68 for (unsigned i = m_context.currentBlock->numSuccessors(); i--;)
69 result[i] = m_context.blockLabels[m_context.currentBlock->successorBlock(i)];
70 return result;
71}
72
73bool StackmapGenerationParams::fallsThroughToSuccessor(unsigned successorIndex) const
74{
75 RELEASE_ASSERT(m_context.indexInBlock == m_context.currentBlock->size() - 1);
76 RELEASE_ASSERT(m_value->effects().terminal);
77
78 Air::BasicBlock* successor = m_context.currentBlock->successorBlock(successorIndex);
79 Air::BasicBlock* nextBlock = m_context.code->findNextBlock(m_context.currentBlock);
80 return successor == nextBlock;
81}
82
83Procedure& StackmapGenerationParams::proc() const
84{
85 return m_context.code->proc();
86}
87
88Air::Code& StackmapGenerationParams::code() const
89{
90 return proc().code();
91}
92
93StackmapGenerationParams::StackmapGenerationParams(
94 StackmapValue* value, const Vector<ValueRep>& reps, Air::GenerationContext& context)
95 : m_value(value)
96 , m_reps(reps)
97 , m_context(context)
98{
99}
100
101} } // namespace JSC::B3
102
103#endif // ENABLE(B3_JIT)
104
105