jit/JITDriver.h

   1 /*
   2  * Copyright (C) 2012 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 JITDriver_h
  27 #define JITDriver_h
  28
  29 #include <wtf/Platform.h>
  30
  31 #if ENABLE(JIT)
  32
  33 #include "BytecodeGenerator.h"
  34 #include "DFGDriver.h"
  35 #include "JIT.h"
  36 #include "LLIntEntrypoints.h"
  37
  38 namespace JSC {
  39
  40 template<typename CodeBlockType>
  41 inline bool jitCompileIfAppropriate(JSGlobalData& globalData, OwnPtr<CodeBlockType>& codeBlock, JITCode& jitCode, JITCode::JITType jitType, JITCompilationEffort effort)
  42 {
  43     if (jitType == codeBlock->getJITType())
  44         return true;
  45
  46     if (!globalData.canUseJIT())
  47         return true;
  48
  49     codeBlock->unlinkIncomingCalls();
  50
  51     JITCode oldJITCode = jitCode;
  52
  53     bool dfgCompiled = false;
  54     if (jitType == JITCode::DFGJIT)
  55         dfgCompiled = DFG::tryCompile(globalData, codeBlock.get(), jitCode);
  56     if (dfgCompiled) {
  57         if (codeBlock->alternative())
  58             codeBlock->alternative()->unlinkIncomingCalls();
  59     } else {
  60         if (codeBlock->alternative()) {
  61             codeBlock = static_pointer_cast<CodeBlockType>(codeBlock->releaseAlternative());
  62             jitCode = oldJITCode;
  63             return false;
  64         }
  65         jitCode = JIT::compile(&globalData, codeBlock.get(), effort);
  66         if (!jitCode) {
  67             jitCode = oldJITCode;
  68             return false;
  69         }
  70     }
  71     codeBlock->setJITCode(jitCode, MacroAssemblerCodePtr());
  72
  73     return true;
  74 }
  75
  76 inline bool jitCompileFunctionIfAppropriate(JSGlobalData& globalData, OwnPtr<FunctionCodeBlock>& codeBlock, JITCode& jitCode, MacroAssemblerCodePtr& jitCodeWithArityCheck, SharedSymbolTable*& symbolTable, JITCode::JITType jitType, JITCompilationEffort effort)
  77 {
  78     if (jitType == codeBlock->getJITType())
  79         return true;
  80
  81     if (!globalData.canUseJIT())
  82         return true;
  83
  84     codeBlock->unlinkIncomingCalls();
  85
  86     JITCode oldJITCode = jitCode;
  87     MacroAssemblerCodePtr oldJITCodeWithArityCheck = jitCodeWithArityCheck;
  88
  89     bool dfgCompiled = false;
  90     if (jitType == JITCode::DFGJIT)
  91         dfgCompiled = DFG::tryCompileFunction(globalData, codeBlock.get(), jitCode, jitCodeWithArityCheck);
  92     if (dfgCompiled) {
  93         if (codeBlock->alternative())
  94             codeBlock->alternative()->unlinkIncomingCalls();
  95     } else {
  96         if (codeBlock->alternative()) {
  97             codeBlock = static_pointer_cast<FunctionCodeBlock>(codeBlock->releaseAlternative());
  98             symbolTable = codeBlock->sharedSymbolTable();
  99             jitCode = oldJITCode;
 100             jitCodeWithArityCheck = oldJITCodeWithArityCheck;
 101             return false;
 102         }
 103         jitCode = JIT::compile(&globalData, codeBlock.get(), effort, &jitCodeWithArityCheck);
 104         if (!jitCode) {
 105             jitCode = oldJITCode;
 106             jitCodeWithArityCheck = oldJITCodeWithArityCheck;
 107             return false;
 108         }
 109     }
 110     codeBlock->setJITCode(jitCode, jitCodeWithArityCheck);
 111
 112     return true;
 113 }
 114
 115 } // namespace JSC
 116
 117 #endif // ENABLE(JIT)
 118
 119 #endif // JITDriver_h
 120