kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 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 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 30 | #include "codegen-inl.h" |
| 31 | #include "register-allocator-inl.h" |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 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 |