JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / ftl / FTLFormattedValue.h

diff --git a/ftl/FTLFormattedValue.h b/ftl/FTLFormattedValue.h
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+/*
+ * Copyright (C) 2013 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 FTLFormattedValue_h
+#define FTLFormattedValue_h
+
+#if ENABLE(FTL_JIT)
+
+#include "FTLAbbreviations.h"
+#include "FTLValueFormat.h"
+
+namespace JSC { namespace FTL {
+
+// This class is mostly used for OSR; it's a way of specifying how a value is formatted
+// in cases where it wouldn't have been obvious from looking at other indicators (like
+// the type of the LLVMValueRef or the type of the DFG::Node). Typically this arises
+// because LLVMValueRef doesn't give us the granularity we need to begin with, and we
+// use this in situations where there is no good way to say what node the value came
+// from.
+
+class FormattedValue {
+public:
+    FormattedValue()
+        : m_format(InvalidValueFormat)
+        , m_value(0)
+    {
+    }
+    
+    FormattedValue(ValueFormat format, LValue value)
+        : m_format(format)
+        , m_value(value)
+    {
+    }
+    
+    bool operator!() const
+    {
+        ASSERT((m_format == InvalidValueFormat) == !m_value);
+        return m_format == InvalidValueFormat;
+    }
+    
+    ValueFormat format() const { return m_format; }
+    LValue value() const { return m_value; }
+
+private:
+    ValueFormat m_format;
+    LValue m_value;
+};
+
+static inline FormattedValue noValue() { return FormattedValue(); }
+static inline FormattedValue int32Value(LValue value) { return FormattedValue(ValueFormatInt32, value); }
+static inline FormattedValue booleanValue(LValue value) { return FormattedValue(ValueFormatBoolean, value); }
+static inline FormattedValue jsValueValue(LValue value) { return FormattedValue(ValueFormatJSValue, value); }
+static inline FormattedValue doubleValue(LValue value) { return FormattedValue(ValueFormatDouble, value); }
+
+} } // namespace JSC::FTL
+
+#endif // ENABLE(FTL_JIT)
+
+#endif // FTLFormattedValue_h
+