Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 88 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGDriver.cpp b/Source/JavaScriptCore/dfg/DFGDriver.cpp
new file mode 100644
index 000000000..2143fbc19
--- /dev/null
+++ b/Source/JavaScriptCore/dfg/DFGDriver.cpp
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+/*
+ * Copyright (C) 2011 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. 
+ */
+
+#include "config.h"
+#include "DFGDriver.h"
+
+#if ENABLE(DFG_JIT)
+
+#include "DFGByteCodeParser.h"
+#include "DFGJITCompiler.h"
+#include "DFGPropagator.h"
+
+namespace JSC { namespace DFG {
+
+enum CompileMode { CompileFunction, CompileOther };
+inline bool compile(CompileMode compileMode, ExecState* exec, CodeBlock* codeBlock, JITCode& jitCode, MacroAssemblerCodePtr* jitCodeWithArityCheck)
+{
+    SamplingRegion samplingRegion("DFG Compilation (Driver)");
+    
+    ASSERT(codeBlock);
+    ASSERT(codeBlock->alternative());
+    ASSERT(codeBlock->alternative()->getJITType() == JITCode::BaselineJIT);
+
+#if DFG_ENABLE(DEBUG_VERBOSE)
+    fprintf(stderr, "DFG compiling code block %p(%p), number of instructions = %u.\n", codeBlock, codeBlock->alternative(), codeBlock->instructionCount());
+#endif
+    
+    JSGlobalData* globalData = &exec->globalData();
+    Graph dfg;
+    if (!parse(dfg, globalData, codeBlock))
+        return false;
+    
+    if (compileMode == CompileFunction)
+        dfg.predictArgumentTypes(codeBlock);
+    
+    propagate(dfg, globalData, codeBlock);
+    
+    JITCompiler dataFlowJIT(globalData, dfg, codeBlock);
+    if (compileMode == CompileFunction) {
+        ASSERT(jitCodeWithArityCheck);
+        
+        dataFlowJIT.compileFunction(jitCode, *jitCodeWithArityCheck);
+    } else {
+        ASSERT(compileMode == CompileOther);
+        ASSERT(!jitCodeWithArityCheck);
+        
+        dataFlowJIT.compile(jitCode);
+    }
+    
+    return true;
+}
+
+bool tryCompile(ExecState* exec, CodeBlock* codeBlock, JITCode& jitCode)
+{
+    return compile(CompileOther, exec, codeBlock, jitCode, 0);
+}
+
+bool tryCompileFunction(ExecState* exec, CodeBlock* codeBlock, JITCode& jitCode, MacroAssemblerCodePtr& jitCodeWithArityCheck)
+{
+    return compile(CompileFunction, exec, codeBlock, jitCode, &jitCodeWithArityCheck);
+}
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+