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|    1 // Copyright 2013 the V8 project authors. All rights reserved. |    1 // Copyright 2013 the V8 project authors. All rights reserved. | 
|    2 // Redistribution and use in source and binary forms, with or without |    2 // Redistribution and use in source and binary forms, with or without | 
|    3 // modification, are permitted provided that the following conditions are |    3 // modification, are permitted provided that the following conditions are | 
|    4 // met: |    4 // met: | 
|    5 // |    5 // | 
|    6 //     * Redistributions of source code must retain the above copyright |    6 //     * Redistributions of source code must retain the above copyright | 
|    7 //       notice, this list of conditions and the following disclaimer. |    7 //       notice, this list of conditions and the following disclaimer. | 
|    8 //     * Redistributions in binary form must reproduce the above |    8 //     * Redistributions in binary form must reproduce the above | 
|    9 //       copyright notice, this list of conditions and the following |    9 //       copyright notice, this list of conditions and the following | 
|   10 //       disclaimer in the documentation and/or other materials provided |   10 //       disclaimer in the documentation and/or other materials provided | 
|   11 //       with the distribution. |   11 //       with the distribution. | 
|   12 //     * Neither the name of Google Inc. nor the names of its |   12 //     * Neither the name of Google Inc. nor the names of its | 
|   13 //       contributors may be used to endorse or promote products derived |   13 //       contributors may be used to endorse or promote products derived | 
|   14 //       from this software without specific prior written permission. |   14 //       from this software without specific prior written permission. | 
|   15 // |   15 // | 
|   16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |   16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | 
|   17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |   17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | 
|   18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |   18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | 
|   19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |   19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | 
|   20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |   20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | 
|   21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |   21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 
|   22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |   22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 
|   23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |   23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 
|   24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |   24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 
|   25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |   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. |   26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 
|   27  |   27  | 
|   28 #include "v8.h" |   28 #include "v8.h" | 
|   29  |   29  | 
|   30 #include "a64/lithium-gap-resolver-a64.h" |   30 #include "arm64/lithium-gap-resolver-arm64.h" | 
|   31 #include "a64/lithium-codegen-a64.h" |   31 #include "arm64/lithium-codegen-arm64.h" | 
|   32  |   32  | 
|   33 namespace v8 { |   33 namespace v8 { | 
|   34 namespace internal { |   34 namespace internal { | 
|   35  |   35  | 
|   36 // We use the root register to spill a value while breaking a cycle in parallel |   36 // We use the root register to spill a value while breaking a cycle in parallel | 
|   37 // moves. We don't need access to roots while resolving the move list and using |   37 // moves. We don't need access to roots while resolving the move list and using | 
|   38 // the root register has two advantages: |   38 // the root register has two advantages: | 
|   39 //  - It is not in crankshaft allocatable registers list, so it can't interfere |   39 //  - It is not in crankshaft allocatable registers list, so it can't interfere | 
|   40 //    with any of the moves we are resolving. |   40 //    with any of the moves we are resolving. | 
|   41 //  - We don't need to push it on the stack, as we can reload it with its value |   41 //  - We don't need to push it on the stack, as we can reload it with its value | 
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|  317   LOperand* src = moves_[index].source(); |  317   LOperand* src = moves_[index].source(); | 
|  318   LOperand* dst = moves_[index].destination(); |  318   LOperand* dst = moves_[index].destination(); | 
|  319  |  319  | 
|  320   ASSERT(src->IsStackSlot()); |  320   ASSERT(src->IsStackSlot()); | 
|  321   ASSERT(dst->IsStackSlot()); |  321   ASSERT(dst->IsStackSlot()); | 
|  322   __ Ldr(temp, cgen_->ToMemOperand(src)); |  322   __ Ldr(temp, cgen_->ToMemOperand(src)); | 
|  323   __ Str(temp, cgen_->ToMemOperand(dst)); |  323   __ Str(temp, cgen_->ToMemOperand(dst)); | 
|  324 } |  324 } | 
|  325  |  325  | 
|  326 } }  // namespace v8::internal |  326 } }  // namespace v8::internal | 
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