JavaScriptCore-1097.3.tar.gz

[apple/javascriptcore.git] / dfg / DFGCommon.h

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+/*
+ * Copyright (C) 2011, 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 DFGCommon_h
+#define DFGCommon_h
+
+#include <wtf/Platform.h>
+
+#if ENABLE(DFG_JIT)
+
+#include "CodeOrigin.h"
+#include "VirtualRegister.h"
+
+/* DFG_ENABLE() - turn on a specific features in the DFG JIT */
+#define DFG_ENABLE(DFG_FEATURE) (defined DFG_ENABLE_##DFG_FEATURE && DFG_ENABLE_##DFG_FEATURE)
+
+// Emit various logging information for debugging, including dumping the dataflow graphs.
+#define DFG_ENABLE_DEBUG_VERBOSE 0
+// Emit dumps during propagation, in addition to just after.
+#define DFG_ENABLE_DEBUG_PROPAGATION_VERBOSE 0
+// Emit logging for OSR exit value recoveries at every node, not just nodes that
+// actually has speculation checks.
+#define DFG_ENABLE_VERBOSE_VALUE_RECOVERIES 0
+// Enable generation of dynamic checks into the instruction stream.
+#if !ASSERT_DISABLED
+#define DFG_ENABLE_JIT_ASSERT 1
+#else
+#define DFG_ENABLE_JIT_ASSERT 0
+#endif
+// Consistency check contents compiler data structures.
+#define DFG_ENABLE_CONSISTENCY_CHECK 0
+// Emit a breakpoint into the head of every generated function, to aid debugging in GDB.
+#define DFG_ENABLE_JIT_BREAK_ON_EVERY_FUNCTION 0
+// Emit a breakpoint into the head of every generated block, to aid debugging in GDB.
+#define DFG_ENABLE_JIT_BREAK_ON_EVERY_BLOCK 0
+// Emit a breakpoint into the head of every generated node, to aid debugging in GDB.
+#define DFG_ENABLE_JIT_BREAK_ON_EVERY_NODE 0
+// Emit a pair of xorPtr()'s on regT0 with the node index to make it easy to spot node boundaries in disassembled code.
+#define DFG_ENABLE_XOR_DEBUG_AID 0
+// Emit a breakpoint into the speculation failure code.
+#define DFG_ENABLE_JIT_BREAK_ON_SPECULATION_FAILURE 0
+// Log every speculation failure.
+#define DFG_ENABLE_VERBOSE_SPECULATION_FAILURE 0
+// Disable the DFG JIT without having to touch Platform.h
+#define DFG_DEBUG_LOCAL_DISBALE 0
+// Enable OSR entry from baseline JIT.
+#define DFG_ENABLE_OSR_ENTRY ENABLE(DFG_JIT)
+// Generate stats on how successful we were in making use of the DFG jit, and remaining on the hot path.
+#define DFG_ENABLE_SUCCESS_STATS 0
+// Enable verification that the DFG is able to insert code for control flow edges.
+#define DFG_ENABLE_EDGE_CODE_VERIFICATION 0
+// Pretend that all variables in the top-level code block got captured. Great
+// for testing code gen for activations.
+#define DFG_ENABLE_ALL_VARIABLES_CAPTURED 0
+
+namespace JSC { namespace DFG {
+
+// Type for a reference to another node in the graph.
+typedef uint32_t NodeIndex;
+static const NodeIndex NoNode = UINT_MAX;
+
+typedef uint32_t BlockIndex;
+static const BlockIndex NoBlock = UINT_MAX;
+
+struct NodeIndexTraits {
+    static NodeIndex defaultValue() { return NoNode; }
+    static void dump(NodeIndex value, FILE* out)
+    {
+        if (value == NoNode)
+            fprintf(out, "-");
+        else
+            fprintf(out, "@%u", value);
+    }
+};
+
+enum UseKind {
+    UntypedUse,
+    DoubleUse,
+    LastUseKind // Must always be the last entry in the enum, as it is used to denote the number of enum elements.
+};
+
+inline const char* useKindToString(UseKind useKind)
+{
+    switch (useKind) {
+    case UntypedUse:
+        return "";
+    case DoubleUse:
+        return "d";
+    default:
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+}
+
+inline bool isX86()
+{
+#if CPU(X86_64) || CPU(X86)
+    return true;
+#else
+    return false;
+#endif
+}
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+
+#endif // DFGCommon_h
+