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(B3_JIT)
29
30#include "CPU.h"
31#include "Options.h"
32
33namespace JSC { namespace B3 { namespace Air {
34
35class Code;
36
37inline bool useIRC()
38{
39 return Options::airForceIRCAllocator()
40 || (!isARM64() && !Options::airForceBriggsAllocator());
41}
42
43// We have two register allocators, both fundamentally derived from Chaitin's Yorktown
44// allocator:
45// http://cs.gmu.edu/~white/CS640/p98-chaitin.pdf
46//
47// We have an implementation of Briggs's optimistic allocator which is derivative of Chaitin's allocator:
48// http://www.cs.utexas.edu/users/mckinley/380C/lecs/briggs-thesis-1992.pdf
49//
50// And an implementation of Andrew Appel's Iterated Register Coalescing which is derivative of Briggs's allocator.
51// http://www.cs.cmu.edu/afs/cs/academic/class/15745-s07/www/papers/george.pdf
52void allocateRegistersByGraphColoring(Code&);
53
54} } } // namespace JSC::B3::Air
55
56#endif // ENABLE(B3_JIT)
57