1 files changed, 77 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/llvm/InitializeLLVM.cpp b/Source/JavaScriptCore/llvm/InitializeLLVM.cpp
new file mode 100644
index 000000000..47348bc39
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+++ b/Source/JavaScriptCore/llvm/InitializeLLVM.cpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2013-2015 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 "InitializeLLVM.h"
+
+#if HAVE(LLVM)
+
+#include "LLVMAPI.h"
+#include "Options.h"
+#include <pthread.h>
+#include <wtf/DataLog.h>
+
+namespace JSC {
+
+static pthread_once_t initializeLLVMOnceKey = PTHREAD_ONCE_INIT;
+
+static void initializeLLVMImpl()
+{
+    const bool verbose =
+        Options::verboseFTLCompilation()
+        || Options::showFTLDisassembly()
+        || Options::verboseFTLFailure()
+        || Options::verboseCompilation()
+        || Options::showDFGDisassembly()
+        || Options::showDisassembly();
+    
+    LLVMInitializerFunction initializer = getLLVMInitializerFunction(verbose);
+    if (!initializer)
+        return;
+    
+    bool enableFastISel = Options::enableLLVMFastISel();
+    llvm = initializer(WTFLogAlwaysAndCrash, &enableFastISel);
+    if (!llvm) {
+        if (verbose)
+            dataLog("LLVM initilization failed.\n");
+    }
+    if (Options::enableLLVMFastISel() && !enableFastISel) {
+        if (verbose)
+            dataLog("Fast ISel requested but LLVM not new enough.\n");
+    }
+    
+    enableLLVMFastISel = enableFastISel;
+}
+
+bool initializeLLVM()
+{
+    pthread_once(&initializeLLVMOnceKey, initializeLLVMImpl);
+    return !!llvm;
+}
+
+} // namespace JSC
+
+#endif // HAVE(LLVM)
+