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1 // Copyright 2009 the V8 project authors. All rights reserved. | |
2 // Redistribution and use in source and binary forms, with or without | |
3 // modification, are permitted provided that the following conditions are | |
4 // met: | |
5 // | |
6 // * Redistributions of source code must retain the above copyright | |
7 // notice, this list of conditions and the following disclaimer. | |
8 // * Redistributions in binary form must reproduce the above | |
9 // copyright notice, this list of conditions and the following | |
10 // disclaimer in the documentation and/or other materials provided | |
11 // with the distribution. | |
12 // * Neither the name of Google Inc. nor the names of its | |
13 // contributors may be used to endorse or promote products derived | |
14 // from this software without specific prior written permission. | |
15 // | |
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
27 | |
28 #include "v8.h" | |
29 | |
30 #include "codegen-inl.h" | |
31 #include "register-allocator-inl.h" | |
32 | |
33 namespace v8 { namespace internal { | |
34 | |
35 // ------------------------------------------------------------------------- | |
36 // Result implementation. | |
37 | |
38 void Result::ToRegister() { | |
39 UNIMPLEMENTED(); | |
40 } | |
41 | |
42 | |
43 void Result::ToRegister(Register target) { | |
44 UNIMPLEMENTED(); | |
45 } | |
46 | |
47 | |
48 // ------------------------------------------------------------------------- | |
49 // RegisterAllocator implementation. | |
50 | |
51 RegisterFile RegisterAllocator::Reserved() { | |
52 RegisterFile reserved; | |
53 reserved.Use(sp); | |
54 reserved.Use(fp); | |
55 reserved.Use(cp); | |
56 reserved.Use(pc); | |
57 return reserved; | |
58 } | |
59 | |
60 | |
61 void RegisterAllocator::UnuseReserved(RegisterFile* register_file) { | |
62 register_file->ref_counts_[sp.code()] = 0; | |
63 register_file->ref_counts_[fp.code()] = 0; | |
64 register_file->ref_counts_[cp.code()] = 0; | |
65 register_file->ref_counts_[pc.code()] = 0; | |
66 } | |
67 | |
68 | |
69 void RegisterAllocator::Initialize() { | |
70 Reset(); | |
71 // The following registers are live on function entry, saved in the | |
72 // frame, and available for allocation during execution. | |
73 Use(r1); // JS function. | |
74 Use(lr); // Return address. | |
75 } | |
76 | |
77 | |
78 void RegisterAllocator::Reset() { | |
79 registers_.Reset(); | |
80 // The following registers are live on function entry and reserved | |
81 // during execution. | |
82 Use(sp); // Stack pointer. | |
83 Use(fp); // Frame pointer (caller's frame pointer on entry). | |
84 Use(cp); // Context context (callee's context on entry). | |
85 Use(pc); // Program counter. | |
86 } | |
87 | |
88 | |
89 Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() { | |
90 UNIMPLEMENTED(); | |
91 Result invalid(cgen_); | |
92 return invalid; | |
93 } | |
94 | |
95 | |
96 } } // namespace v8::internal | |
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