The Tor Browser: js/src/jit/ParallelSafetyAnalysis.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * vim: set ts=8 sts=4 et sw=4 tw=99:

     3  * This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef jit_ParallelSafetyAnalysis_h

     8 #define jit_ParallelSafetyAnalysis_h

    10 #include "jit/MIR.h"

    12 namespace js {

    14 class InterpreterFrame;

    16 namespace jit {

    18 class MIRGraph;

    19 class AutoDestroyAllocator;

    21 // Determines whether a function is compatible for parallel execution.

    22 // Removes basic blocks containing unsafe MIR operations from the

    23 // graph and replaces them with MAbortPar blocks.

    24 class ParallelSafetyAnalysis

    25 {

    26     MIRGenerator *mir_;

    27     MIRGraph &graph_;

    29     bool removeResumePointOperands();

    30     void replaceOperandsOnResumePoint(MResumePoint *resumePoint, MDefinition *withDef);

    32   public:

    33     ParallelSafetyAnalysis(MIRGenerator *mir,

    34                            MIRGraph &graph)

    35       : mir_(mir),

    36         graph_(graph)

    37     {}

    39     bool analyze();

    40 };

    42 // Code to collect list of possible call targets by scraping through

    43 // TI and baseline data. Used to permit speculative transitive

    44 // compilation in vm/ForkJoin.

    45 //

    46 // This code may clone scripts and thus may invoke the GC.  Hence only

    47 // run from the link phase, which executes on the main thread.

    48 typedef Vector<JSScript *, 4, IonAllocPolicy> CallTargetVector;

    49 bool AddPossibleCallees(JSContext *cx, MIRGraph &graph, CallTargetVector &targets);

    51 } // namespace jit

    52 } // namespace js

    54 #endif /* jit_ParallelSafetyAnalysis_h */

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