mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-08 09:51:46 +00:00
118 lines
3.6 KiB
C++
118 lines
3.6 KiB
C++
/*
|
|
* Copyright (C) 2015-2016 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.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "B3SwitchValue.h"
|
|
|
|
#if ENABLE(B3_JIT)
|
|
|
|
#include "B3BasicBlockInlines.h"
|
|
#include "B3ValueInlines.h"
|
|
#include <wtf/ListDump.h>
|
|
|
|
namespace JSC { namespace B3 {
|
|
|
|
SwitchValue::~SwitchValue()
|
|
{
|
|
}
|
|
|
|
BasicBlock* SwitchValue::fallThrough(const BasicBlock* owner)
|
|
{
|
|
ASSERT(hasFallThrough());
|
|
BasicBlock* fallThrough = owner->successor(owner->numSuccessors() - 1).block();
|
|
ASSERT(fallThrough == owner->fallThrough().block());
|
|
return fallThrough;
|
|
}
|
|
|
|
bool SwitchValue::hasFallThrough(const BasicBlock* block) const
|
|
{
|
|
unsigned numSuccessors = block->numSuccessors();
|
|
unsigned numValues = m_values.size();
|
|
RELEASE_ASSERT(numValues == numSuccessors || numValues + 1 == numSuccessors);
|
|
|
|
return numValues + 1 == numSuccessors;
|
|
}
|
|
|
|
bool SwitchValue::hasFallThrough() const
|
|
{
|
|
return hasFallThrough(owner);
|
|
}
|
|
|
|
void SwitchValue::setFallThrough(BasicBlock* block, const FrequentedBlock& target)
|
|
{
|
|
if (!hasFallThrough())
|
|
block->successors().append(target);
|
|
else
|
|
block->successors().last() = target;
|
|
ASSERT(hasFallThrough(block));
|
|
}
|
|
|
|
void SwitchValue::appendCase(BasicBlock* block, const SwitchCase& switchCase)
|
|
{
|
|
if (!hasFallThrough())
|
|
block->successors().append(switchCase.target());
|
|
else {
|
|
block->successors().append(block->successors().last());
|
|
block->successor(block->numSuccessors() - 2) = switchCase.target();
|
|
}
|
|
m_values.append(switchCase.caseValue());
|
|
}
|
|
|
|
void SwitchValue::setFallThrough(const FrequentedBlock& target)
|
|
{
|
|
setFallThrough(owner, target);
|
|
}
|
|
|
|
void SwitchValue::appendCase(const SwitchCase& switchCase)
|
|
{
|
|
appendCase(owner, switchCase);
|
|
}
|
|
|
|
void SwitchValue::dumpSuccessors(const BasicBlock* block, PrintStream& out) const
|
|
{
|
|
// We must not crash due to a number-of-successors mismatch! Someone debugging a
|
|
// number-of-successors bug will want to dump IR!
|
|
if (numCaseValues() + 1 != block->numSuccessors()) {
|
|
Value::dumpSuccessors(block, out);
|
|
return;
|
|
}
|
|
|
|
out.print(cases(block));
|
|
}
|
|
|
|
void SwitchValue::dumpMeta(CommaPrinter& comma, PrintStream& out) const
|
|
{
|
|
out.print(comma, "cases = [", listDump(m_values), "]");
|
|
}
|
|
|
|
SwitchValue::SwitchValue(Origin origin, Value* child)
|
|
: Value(CheckedOpcode, Switch, Void, One, origin, child)
|
|
{
|
|
}
|
|
|
|
} } // namespace JSC::B3
|
|
|
|
#endif // ENABLE(B3_JIT)
|