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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 "Options.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
// Enable validation of the graph.
#if !ASSERT_DISABLED
#define DFG_ENABLE_VALIDATION 1
#else
#define DFG_ENABLE_VALIDATION 0
#endif
// Enable validation on completion of each phase.
#define DFG_ENABLE_PER_PHASE_VALIDATION 0
// 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
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
}
enum SpillRegistersMode { NeedToSpill, DontSpill };
enum NoResultTag { NoResult };
enum OptimizationFixpointState { BeforeFixpoint, FixpointNotConverged, FixpointConverged };
inline bool shouldShowDisassembly()
{
return Options::showDisassembly() || Options::showDFGDisassembly();
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
namespace JSC { namespace DFG {
// Put things here that must be defined even if ENABLE(DFG_JIT) is false.
enum CapabilityLevel { CannotCompile, ShouldProfile, CanCompile, CapabilityLevelNotSet };
} } // namespace JSC::DFG
#endif // DFGCommon_h
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