JavaScriptCore-1097.3.tar.gz

[apple/javascriptcore.git] / jit / JITDriver.h

diff --git a/jit/JITDriver.h b/jit/JITDriver.h
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+/*
+ * Copyright (C) 2012 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef JITDriver_h
+#define JITDriver_h
+
+#include <wtf/Platform.h>
+
+#if ENABLE(JIT)
+
+#include "BytecodeGenerator.h"
+#include "DFGDriver.h"
+#include "JIT.h"
+#include "LLIntEntrypoints.h"
+
+namespace JSC {
+
+template<typename CodeBlockType>
+inline bool jitCompileIfAppropriate(JSGlobalData& globalData, OwnPtr<CodeBlockType>& codeBlock, JITCode& jitCode, JITCode::JITType jitType, JITCompilationEffort effort)
+{
+    if (jitType == codeBlock->getJITType())
+        return true;
+    
+    if (!globalData.canUseJIT())
+        return true;
+    
+    codeBlock->unlinkIncomingCalls();
+    
+    JITCode oldJITCode = jitCode;
+    
+    bool dfgCompiled = false;
+    if (jitType == JITCode::DFGJIT)
+        dfgCompiled = DFG::tryCompile(globalData, codeBlock.get(), jitCode);
+    if (dfgCompiled) {
+        if (codeBlock->alternative())
+            codeBlock->alternative()->unlinkIncomingCalls();
+    } else {
+        if (codeBlock->alternative()) {
+            codeBlock = static_pointer_cast<CodeBlockType>(codeBlock->releaseAlternative());
+            jitCode = oldJITCode;
+            return false;
+        }
+        jitCode = JIT::compile(&globalData, codeBlock.get(), effort);
+        if (!jitCode) {
+            jitCode = oldJITCode;
+            return false;
+        }
+    }
+    codeBlock->setJITCode(jitCode, MacroAssemblerCodePtr());
+    
+    return true;
+}
+
+inline bool jitCompileFunctionIfAppropriate(JSGlobalData& globalData, OwnPtr<FunctionCodeBlock>& codeBlock, JITCode& jitCode, MacroAssemblerCodePtr& jitCodeWithArityCheck, SharedSymbolTable*& symbolTable, JITCode::JITType jitType, JITCompilationEffort effort)
+{
+    if (jitType == codeBlock->getJITType())
+        return true;
+    
+    if (!globalData.canUseJIT())
+        return true;
+    
+    codeBlock->unlinkIncomingCalls();
+    
+    JITCode oldJITCode = jitCode;
+    MacroAssemblerCodePtr oldJITCodeWithArityCheck = jitCodeWithArityCheck;
+    
+    bool dfgCompiled = false;
+    if (jitType == JITCode::DFGJIT)
+        dfgCompiled = DFG::tryCompileFunction(globalData, codeBlock.get(), jitCode, jitCodeWithArityCheck);
+    if (dfgCompiled) {
+        if (codeBlock->alternative())
+            codeBlock->alternative()->unlinkIncomingCalls();
+    } else {
+        if (codeBlock->alternative()) {
+            codeBlock = static_pointer_cast<FunctionCodeBlock>(codeBlock->releaseAlternative());
+            symbolTable = codeBlock->sharedSymbolTable();
+            jitCode = oldJITCode;
+            jitCodeWithArityCheck = oldJITCodeWithArityCheck;
+            return false;
+        }
+        jitCode = JIT::compile(&globalData, codeBlock.get(), effort, &jitCodeWithArityCheck);
+        if (!jitCode) {
+            jitCode = oldJITCode;
+            jitCodeWithArityCheck = oldJITCodeWithArityCheck;
+            return false;
+        }
+    }
+    codeBlock->setJITCode(jitCode, jitCodeWithArityCheck);
+    
+    return true;
+}
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)
+
+#endif // JITDriver_h
+