1/*
2 * Copyright (C) 2012-2017 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 "MethodOfGettingAValueProfile.h"
28
29#if ENABLE(DFG_JIT)
30
31#include "ArithProfile.h"
32#include "CCallHelpers.h"
33#include "CodeBlock.h"
34#include "JSCInlines.h"
35
36namespace JSC {
37
38MethodOfGettingAValueProfile MethodOfGettingAValueProfile::fromLazyOperand(
39 CodeBlock* codeBlock, const LazyOperandValueProfileKey& key)
40{
41 MethodOfGettingAValueProfile result;
42 result.m_kind = LazyOperand;
43 result.u.lazyOperand.codeBlock = codeBlock;
44 result.u.lazyOperand.bytecodeOffset = key.bytecodeOffset();
45 result.u.lazyOperand.operand = key.operand().offset();
46 return result;
47}
48
49void MethodOfGettingAValueProfile::emitReportValue(CCallHelpers& jit, JSValueRegs regs) const
50{
51 switch (m_kind) {
52 case None:
53 return;
54
55 case Ready:
56 jit.storeValue(regs, u.profile->specFailBucket(0));
57 return;
58
59 case LazyOperand: {
60 LazyOperandValueProfileKey key(u.lazyOperand.bytecodeOffset, VirtualRegister(u.lazyOperand.operand));
61
62 ConcurrentJSLocker locker(u.lazyOperand.codeBlock->m_lock);
63 LazyOperandValueProfile* profile =
64 u.lazyOperand.codeBlock->lazyOperandValueProfiles(locker).add(locker, key);
65 jit.storeValue(regs, profile->specFailBucket(0));
66 return;
67 }
68
69 case ArithProfileReady: {
70 u.arithProfile->emitObserveResult(jit, regs, DoNotHaveTagRegisters);
71 return;
72 } }
73
74 RELEASE_ASSERT_NOT_REACHED();
75}
76
77void MethodOfGettingAValueProfile::reportValue(JSValue value)
78{
79 switch (m_kind) {
80 case None:
81 return;
82
83 case Ready:
84 *u.profile->specFailBucket(0) = JSValue::encode(value);
85 return;
86
87 case LazyOperand: {
88 LazyOperandValueProfileKey key(u.lazyOperand.bytecodeOffset, VirtualRegister(u.lazyOperand.operand));
89
90 ConcurrentJSLocker locker(u.lazyOperand.codeBlock->m_lock);
91 LazyOperandValueProfile* profile =
92 u.lazyOperand.codeBlock->lazyOperandValueProfiles(locker).add(locker, key);
93 *profile->specFailBucket(0) = JSValue::encode(value);
94 return;
95 }
96
97 case ArithProfileReady: {
98 u.arithProfile->observeResult(value);
99 return;
100 } }
101
102 RELEASE_ASSERT_NOT_REACHED();
103}
104
105} // namespace JSC
106
107#endif // ENABLE(DFG_JIT)
108
109