10511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// Copyright 2011 the V8 project authors. All rights reserved. 20511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// Redistribution and use in source and binary forms, with or without 30511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// modification, are permitted provided that the following conditions are 40511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// met: 50511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// 60511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// * Redistributions of source code must retain the above copyright 70511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// notice, this list of conditions and the following disclaimer. 80511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// * Redistributions in binary form must reproduce the above 90511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// copyright notice, this list of conditions and the following 100511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// disclaimer in the documentation and/or other materials provided 110511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// with the distribution. 120511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// * Neither the name of Google Inc. nor the names of its 130511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// contributors may be used to endorse or promote products derived 140511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// from this software without specific prior written permission. 150511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// 160511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 170511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 180511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 190511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 200511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 210511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 220511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 230511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 240511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 250511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 260511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 270511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 280511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com#ifndef V8_IA32_LITHIUM_GAP_RESOLVER_IA32_H_ 290511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com#define V8_IA32_LITHIUM_GAP_RESOLVER_IA32_H_ 300511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 310511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com#include "v8.h" 320511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 330a4e901cdfb5505a896d30aa8c2e04fce0fbe069vegorov@chromium.org#include "lithium.h" 340511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 350511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.comnamespace v8 { 360511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.comnamespace internal { 370511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 380511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.comclass LCodeGen; 390511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.comclass LGapResolver; 400511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 410511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.comclass LGapResolver BASE_EMBEDDED { 420511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com public: 430511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com explicit LGapResolver(LCodeGen* owner); 440511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 450511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Resolve a set of parallel moves, emitting assembler instructions. 460511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void Resolve(LParallelMove* parallel_move); 470511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 480511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com private: 490511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Build the initial list of moves. 500511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void BuildInitialMoveList(LParallelMove* parallel_move); 510511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 520511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Perform the move at the moves_ index in question (possibly requiring 530511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // other moves to satisfy dependencies). 540511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void PerformMove(int index); 550511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 560511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Emit any code necessary at the end of a gap move. 570511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void Finish(); 580511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 590511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Add or delete a move from the move graph without emitting any code. 600511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Used to build up the graph and remove trivial moves. 610511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void AddMove(LMoveOperands move); 620511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void RemoveMove(int index); 630511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 640511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Report the count of uses of operand as a source in a not-yet-performed 650511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // move. Used to rebuild use counts. 660511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com int CountSourceUses(LOperand* operand); 670511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 680511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Emit a move and remove it from the move graph. 690511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void EmitMove(int index); 700511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 710511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Execute a move by emitting a swap of two operands. The move from 720511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // source to destination is removed from the move graph. 730511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void EmitSwap(int index); 740511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 750511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Ensure that the given operand is not spilled. 760511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void EnsureRestored(LOperand* operand); 770511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 780511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Return a register that can be used as a temp register, spilling 790511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // something if necessary. 800511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com Register EnsureTempRegister(); 810511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 820511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Return a known free register different from the given one (which could 830511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // be no_reg---returning any free register), or no_reg if there is no such 840511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // register. 850511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com Register GetFreeRegisterNot(Register reg); 860511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 870511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Verify that the state is the initial one, ready to resolve a single 880511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // parallel move. 890511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com bool HasBeenReset(); 900511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 910511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Verify the move list before performing moves. 920511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com void Verify(); 930511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 940511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com LCodeGen* cgen_; 950511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 960511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // List of moves not yet resolved. 970511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com ZoneList<LMoveOperands> moves_; 980511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 990511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // Source and destination use counts for the general purpose registers. 100a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org int source_uses_[Register::kMaxNumAllocatableRegisters]; 101a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org int destination_uses_[Register::kMaxNumAllocatableRegisters]; 1020511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 1030511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // If we had to spill on demand, the currently spilled register's 1040511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com // allocation index. 1050511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com int spilled_register_; 1060511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com}; 1070511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 1080511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com} } // namespace v8::internal 1090511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com 1100511e24c6ebf94594a7e03bdcd58157ac2971d69erik.corry@gmail.com#endif // V8_IA32_LITHIUM_GAP_RESOLVER_IA32_H_ 111