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Issue 6811012: Remove some dead code. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 9 years, 8 months ago
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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 #if defined(V8_TARGET_ARCH_X64)
31
32 #include "codegen-inl.h"
33 #include "register-allocator-inl.h"
34 #include "virtual-frame-inl.h"
35
36 namespace v8 {
37 namespace internal {
38
39 // -------------------------------------------------------------------------
40 // Result implementation.
41
42 void Result::ToRegister() {
43 ASSERT(is_valid());
44 if (is_constant()) {
45 CodeGenerator* code_generator =
46 CodeGeneratorScope::Current(Isolate::Current());
47 Result fresh = code_generator->allocator()->Allocate();
48 ASSERT(fresh.is_valid());
49 code_generator->masm()->Move(fresh.reg(), handle());
50 // This result becomes a copy of the fresh one.
51 fresh.set_type_info(type_info());
52 *this = fresh;
53 }
54 ASSERT(is_register());
55 }
56
57
58 void Result::ToRegister(Register target) {
59 ASSERT(is_valid());
60 CodeGenerator* code_generator =
61 CodeGeneratorScope::Current(Isolate::Current());
62 if (!is_register() || !reg().is(target)) {
63 Result fresh = code_generator->allocator()->Allocate(target);
64 ASSERT(fresh.is_valid());
65 if (is_register()) {
66 code_generator->masm()->movq(fresh.reg(), reg());
67 } else {
68 ASSERT(is_constant());
69 code_generator->masm()->Move(fresh.reg(), handle());
70 }
71 fresh.set_type_info(type_info());
72 *this = fresh;
73 } else if (is_register() && reg().is(target)) {
74 ASSERT(code_generator->has_valid_frame());
75 code_generator->frame()->Spill(target);
76 ASSERT(code_generator->allocator()->count(target) == 1);
77 }
78 ASSERT(is_register());
79 ASSERT(reg().is(target));
80 }
81
82
83 // -------------------------------------------------------------------------
84 // RegisterAllocator implementation.
85
86 Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() {
87 // This function is not used in 64-bit code.
88 UNREACHABLE();
89 return Result();
90 }
91
92
93 } } // namespace v8::internal
94
95 #endif // V8_TARGET_ARCH_X64
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