1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * vim: set ts=4 sw=4 et tw=99:
4 * ***** BEGIN LICENSE BLOCK *****
5 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
7 * The contents of this file are subject to the Mozilla Public License Version
8 * 1.1 (the "License"); you may not use this file except in compliance with
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12 * Software distributed under the License is distributed on an "AS IS" basis,
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17 * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
20 * The Initial Developer of the Original Code is
21 * Brendan Eich <brendan@mozilla.org>
24 * David Anderson <danderson@mozilla.com>
25 * David Mandelin <dmandelin@mozilla.com>
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28 * either of the GNU General Public License Version 2 or later (the "GPL"),
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39 * ***** END LICENSE BLOCK ***** */
41 #if !defined jsjaeger_methodjit_inl_h__ && defined JS_METHODJIT
42 #define jsjaeger_methodjit_inl_h__
49 CompileRequest_Interpreter,
53 /* Number of times a script must be called before we run it in the methodjit. */
54 static const size_t CALLS_BEFORE_COMPILE = 16;
56 /* Number of loop back-edges we execute in the interpreter before methodjitting. */
57 static const size_t BACKEDGES_BEFORE_COMPILE = 16;
59 static inline CompileStatus
60 CanMethodJIT(JSContext *cx, JSScript *script, JSStackFrame *fp, CompileRequest request)
62 if (!cx->methodJitEnabled)
64 JITScriptStatus status = script->getJITStatus(fp->isConstructing());
65 if (status == JITScript_Invalid)
67 if (request == CompileRequest_Interpreter &&
68 status == JITScript_None &&
69 !cx->hasRunOption(JSOPTION_METHODJIT_ALWAYS) &&
70 script->incCallCount() <= CALLS_BEFORE_COMPILE)
72 return Compile_Skipped;
74 if (status == JITScript_None)
75 return TryCompile(cx, fp);
80 * Called from a backedge in the interpreter to decide if we should transition to the
81 * methodjit. If so, we compile the given function.
83 static inline CompileStatus
84 CanMethodJITAtBranch(JSContext *cx, JSScript *script, JSStackFrame *fp, jsbytecode *pc)
86 if (!cx->methodJitEnabled)
88 JITScriptStatus status = script->getJITStatus(fp->isConstructing());
89 if (status == JITScript_Invalid)
91 if (status == JITScript_None &&
92 !cx->hasRunOption(JSOPTION_METHODJIT_ALWAYS) &&
93 cx->compartment->incBackEdgeCount(pc) <= BACKEDGES_BEFORE_COMPILE)
95 return Compile_Skipped;
97 if (status == JITScript_None)
98 return TryCompile(cx, fp);