/js/src/methodjit/MethodJIT-inl.h
http://github.com/zpao/v8monkey · C Header · 108 lines · 53 code · 8 blank · 47 comment · 19 complexity · d316adb963efc610402166b538639559 MD5 · raw file
- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- * vim: set ts=4 sw=4 et tw=99:
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
- * May 28, 2008.
- *
- * The Initial Developer of the Original Code is
- * Brendan Eich <brendan@mozilla.org>
- *
- * Contributor(s):
- * David Anderson <danderson@mozilla.com>
- * David Mandelin <dmandelin@mozilla.com>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- #if !defined jsjaeger_methodjit_inl_h__ && defined JS_METHODJIT
- #define jsjaeger_methodjit_inl_h__
- namespace js {
- namespace mjit {
- enum CompileRequest
- {
- CompileRequest_Interpreter,
- CompileRequest_JIT
- };
- /*
- * We wait before compiling a function with Type Inference to allow more gathering
- * of type information and less recompilation.
- */
- static const size_t USES_BEFORE_COMPILE = 16;
- static const size_t INFER_USES_BEFORE_COMPILE = 40;
- static inline CompileStatus
- CanMethodJIT(JSContext *cx, JSScript *script, bool construct, CompileRequest request)
- {
- if (!cx->methodJitEnabled)
- return Compile_Abort;
- JITScriptStatus status = script->getJITStatus(construct);
- if (status == JITScript_Invalid)
- return Compile_Abort;
- if (request == CompileRequest_Interpreter && status == JITScript_None &&
- !cx->hasRunOption(JSOPTION_METHODJIT_ALWAYS) &&
- (cx->typeInferenceEnabled()
- ? script->incUseCount() <= INFER_USES_BEFORE_COMPILE
- : script->incUseCount() <= USES_BEFORE_COMPILE))
- {
- return Compile_Skipped;
- }
- if (status == JITScript_None)
- return TryCompile(cx, script, construct);
- return Compile_Okay;
- }
- /*
- * Called from a backedge in the interpreter to decide if we should transition to the
- * methodjit. If so, we compile the given function.
- */
- static inline CompileStatus
- CanMethodJITAtBranch(JSContext *cx, JSScript *script, StackFrame *fp, jsbytecode *pc)
- {
- if (!cx->methodJitEnabled)
- return Compile_Abort;
- JITScriptStatus status = script->getJITStatus(fp->isConstructing());
- if (status == JITScript_Invalid)
- return Compile_Abort;
- if (status == JITScript_None && !cx->hasRunOption(JSOPTION_METHODJIT_ALWAYS)) {
- if ((cx->typeInferenceEnabled())
- ? script->incUseCount() <= INFER_USES_BEFORE_COMPILE
- : script->incUseCount() <= USES_BEFORE_COMPILE) {
- return Compile_Skipped;
- }
- }
- if (status == JITScript_None)
- return TryCompile(cx, fp->script(), fp->isConstructing());
- return Compile_Okay;
- }
- }
- }
- #endif