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/*
* Copyright (C) 2012, 2014 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.
*/
#pragma once
#if ENABLE(DFG_JIT)
namespace JSC { namespace DFG {
enum BranchDirection : uint8_t {
// This is not a branch and so there is no branch direction, or
// the branch direction has yet to be set.
InvalidBranchDirection,
// The branch takes the true case.
TakeTrue,
// The branch takes the false case.
TakeFalse,
// For all we know, the branch could go either direction, so we
// have to assume the worst.
TakeBoth
};
static inline const char* branchDirectionToString(BranchDirection branchDirection)
{
switch (branchDirection) {
case InvalidBranchDirection:
return "InvalidBranchDirection";
case TakeTrue:
return "TakeTrue";
case TakeFalse:
return "TakeFalse";
case TakeBoth:
return "TakeBoth";
}
RELEASE_ASSERT_NOT_REACHED();
return "InvalidBranchDirection";
}
static inline bool isKnownDirection(BranchDirection branchDirection)
{
switch (branchDirection) {
case TakeTrue:
case TakeFalse:
return true;
default:
return false;
}
}
static inline bool branchCondition(BranchDirection branchDirection)
{
if (branchDirection == TakeTrue)
return true;
ASSERT(branchDirection == TakeFalse);
return false;
}
} } // namespace JSC::DFG
namespace WTF {
inline void printInternal(PrintStream& out, JSC::DFG::BranchDirection direction)
{
out.print(JSC::DFG::branchDirectionToString(direction));
}
} // namespace WTF
#endif // ENABLE(DFG_JIT)