1/* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef DFGOSREntrypointCreationPhase_h 27#define DFGOSREntrypointCreationPhase_h 28 29#if ENABLE(DFG_JIT) 30 31namespace JSC { namespace DFG { 32 33class Graph; 34 35// This phase is only for compilation pipelines that go through SSA, and that 36// do a specialized OSR entry compile. Currently that means FTL. 37// 38// Creates an OSR entrypoint that establishes all argument and local variable 39// values. This entrypoint only works for the Plan::osrEntryBytecodeIndex. 40// Unlike ordinary OSR entry into the DFG, this forces all variables slurped 41// in through OSR entry to appear TOP to the CFA. Hence this phase must be run 42// early - before doing any CFA. But this also does some additional hacks that 43// require this to run before unification. 44 45bool performOSREntrypointCreation(Graph&); 46 47} } // namespace JSC::DFG 48 49#endif // ENABLE(DFG_JIT) 50 51#endif // DFGOSREntrypointCreationPhase_h 52 53