#ifndef DFGNodeFlags_h
#define DFGNodeFlags_h
#include <wtf/Platform.h>
#if ENABLE(DFG_JIT)
#include <wtf/PrintStream.h>
#include <wtf/StdLibExtras.h>
namespace JSC { namespace DFG {
#define NodeResultMask 0x7
#define NodeResultJS 0x1
#define NodeResultNumber 0x2
#define NodeResultInt32 0x3
#define NodeResultBoolean 0x4
#define NodeResultStorage 0x5
#define NodeMustGenerate 0x08 // set on nodes that have side effects, and may not trivially be removed by DCE.
#define NodeHasVarArgs 0x10
#define NodeClobbersWorld 0x20
#define NodeMightClobber 0x40
#define NodeBehaviorMask 0x180
#define NodeMayOverflow 0x080
#define NodeMayNegZero 0x100
#define NodeBackPropMask 0x1E00
#define NodeUseBottom 0x0000
#define NodeUsedAsNumber 0x0200 // The result of this computation may be used in a context that observes fractional, or bigger-than-int32, results.
#define NodeNeedsNegZero 0x0400 // The result of this computation may be used in a context that observes -0.
#define NodeUsedAsOther 0x0800 // The result of this computation may be used in a context that distinguishes between NaN and other things (like undefined).
#define NodeUsedAsValue (NodeUsedAsNumber | NodeNeedsNegZero | NodeUsedAsOther)
#define NodeUsedAsInt 0x1000 // The result of this computation is known to be used in a context that prefers, but does not require, integer values.
#define NodeArithFlagsMask (NodeBehaviorMask | NodeBackPropMask)
#define NodeDoesNotExit 0x2000 // This flag is negated to make it natural for the default to be that a node does exit.
#define NodeRelevantToOSR 0x4000
#define NodeExitsForward 0x8000
typedef uint32_t NodeFlags;
static inline bool nodeUsedAsNumber(NodeFlags flags)
{
return !!(flags & NodeUsedAsNumber);
}
static inline bool nodeCanTruncateInteger(NodeFlags flags)
{
return !nodeUsedAsNumber(flags);
}
static inline bool nodeCanIgnoreNegativeZero(NodeFlags flags)
{
return !(flags & NodeNeedsNegZero);
}
static inline bool nodeMayOverflow(NodeFlags flags)
{
return !!(flags & NodeMayOverflow);
}
static inline bool nodeCanSpeculateInteger(NodeFlags flags)
{
if (flags & NodeMayOverflow)
return !nodeUsedAsNumber(flags);
if (flags & NodeMayNegZero)
return nodeCanIgnoreNegativeZero(flags);
return true;
}
void dumpNodeFlags(PrintStream&, NodeFlags);
MAKE_PRINT_ADAPTOR(NodeFlagsDump, NodeFlags, dumpNodeFlags);
} }
#endif // ENABLE(DFG_JIT)
#endif // DFGNodeFlags_h