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#pragma once
27
28#if ENABLE(DFG_JIT)
29
30#include "DFGOperations.h"
31#include "DFGSlowPathGenerator.h"
32#include "DFGSpeculativeJIT.h"
33#include "DirectArguments.h"
34
35namespace JSC { namespace DFG {
36
37// This calls operationCreateDirectArguments but then restores the value of lengthGPR.
38class CallCreateDirectArgumentsSlowPathGenerator : public JumpingSlowPathGenerator<MacroAssembler::JumpList> {
39public:
40 CallCreateDirectArgumentsSlowPathGenerator(
41 MacroAssembler::JumpList from, SpeculativeJIT* jit, GPRReg resultGPR, RegisteredStructure structure,
42 GPRReg lengthGPR, unsigned minCapacity)
43 : JumpingSlowPathGenerator<MacroAssembler::JumpList>(from, jit)
44 , m_resultGPR(resultGPR)
45 , m_structure(structure)
46 , m_lengthGPR(lengthGPR)
47 , m_minCapacity(minCapacity)
48 {
49 jit->silentSpillAllRegistersImpl(false, m_plans, resultGPR);
50 }
51
52protected:
53 void generateInternal(SpeculativeJIT* jit) override
54 {
55 linkFrom(jit);
56 for (unsigned i = 0; i < m_plans.size(); ++i)
57 jit->silentSpill(m_plans[i]);
58 jit->callOperation(
59 operationCreateDirectArguments, m_resultGPR, m_structure, m_lengthGPR, m_minCapacity);
60 for (unsigned i = m_plans.size(); i--;)
61 jit->silentFill(m_plans[i]);
62 jit->m_jit.exceptionCheck();
63 jit->m_jit.loadPtr(
64 MacroAssembler::Address(m_resultGPR, DirectArguments::offsetOfLength()), m_lengthGPR);
65 jumpTo(jit);
66 }
67
68private:
69 GPRReg m_resultGPR;
70 RegisteredStructure m_structure;
71 GPRReg m_lengthGPR;
72 unsigned m_minCapacity;
73 Vector<SilentRegisterSavePlan, 2> m_plans;
74};
75
76} } // namespace JSC::DFG
77
78#endif // ENABLE(DFG_JIT)
79