| // Copyright 2009 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "codegen.h" |
| #include "register-allocator.h" |
| |
| namespace v8 { namespace internal { |
| |
| // ------------------------------------------------------------------------- |
| // Result implementation. |
| |
| void Result::ToRegister() { |
| UNIMPLEMENTED(); |
| } |
| |
| |
| void Result::ToRegister(Register target) { |
| UNIMPLEMENTED(); |
| } |
| |
| |
| // ------------------------------------------------------------------------- |
| // RegisterAllocator implementation. |
| |
| RegisterFile RegisterAllocator::Reserved() { |
| RegisterFile reserved; |
| reserved.Use(sp); |
| reserved.Use(fp); |
| reserved.Use(cp); |
| reserved.Use(pc); |
| return reserved; |
| } |
| |
| |
| void RegisterAllocator::UnuseReserved(RegisterFile* register_file) { |
| register_file->ref_counts_[sp.code()] = 0; |
| register_file->ref_counts_[fp.code()] = 0; |
| register_file->ref_counts_[cp.code()] = 0; |
| register_file->ref_counts_[pc.code()] = 0; |
| } |
| |
| |
| void RegisterAllocator::Initialize() { |
| Reset(); |
| // The following registers are live on function entry, saved in the |
| // frame, and available for allocation during execution. |
| Use(r1); // JS function. |
| Use(lr); // Return address. |
| } |
| |
| |
| void RegisterAllocator::Reset() { |
| registers_.Reset(); |
| // The following registers are live on function entry and reserved |
| // during execution. |
| Use(sp); // Stack pointer. |
| Use(fp); // Frame pointer (caller's frame pointer on entry). |
| Use(cp); // Context context (callee's context on entry). |
| Use(pc); // Program counter. |
| } |
| |
| |
| Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() { |
| UNIMPLEMENTED(); |
| Result invalid(cgen_); |
| return invalid; |
| } |
| |
| |
| } } // namespace v8::internal |