1/*
2 * Copyright (C) 2015-2016 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(B3_JIT)
29
30#include "B3Value.h"
31
32namespace JSC { namespace B3 {
33
34class JS_EXPORT_PRIVATE UpsilonValue : public Value {
35public:
36 static bool accepts(Kind kind) { return kind == Upsilon; }
37
38 ~UpsilonValue();
39
40 Value* phi() const { return m_phi; }
41 void setPhi(Value* phi)
42 {
43 ASSERT(child(0)->type() == phi->type());
44 ASSERT(phi->opcode() == Phi);
45 m_phi = phi;
46 }
47
48 B3_SPECIALIZE_VALUE_FOR_FIXED_CHILDREN(1)
49 B3_SPECIALIZE_VALUE_FOR_FINAL_SIZE_FIXED_CHILDREN
50
51protected:
52 void dumpMeta(CommaPrinter&, PrintStream&) const override;
53
54private:
55 friend class Procedure;
56 friend class Value;
57
58 static Opcode opcodeFromConstructor(Origin, Value*, Value* = nullptr) { return Upsilon; }
59 // Note that passing the Phi during construction is optional. A valid pattern is to first create
60 // the Upsilons without the Phi, then create the Phi, then go back and tell the Upsilons about
61 // the Phi. This allows you to emit code in its natural order.
62 UpsilonValue(Origin origin, Value* value, Value* phi = nullptr)
63 : Value(CheckedOpcode, Upsilon, Void, One, origin, value)
64 , m_phi(phi)
65 {
66 if (phi)
67 ASSERT(value->type() == phi->type());
68 }
69
70 Value* m_phi;
71};
72
73} } // namespace JSC::B3
74
75#endif // ENABLE(B3_JIT)
76