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/*
* Copyright (C) 2013, 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.
*/
#include "config.h"
#include "DFGBlockInsertionSet.h"
#if ENABLE(DFG_JIT)
#include "JSCInlines.h"
namespace JSC { namespace DFG {
BlockInsertionSet::BlockInsertionSet(Graph& graph)
: m_graph(graph)
{
}
BlockInsertionSet::~BlockInsertionSet() { }
void BlockInsertionSet::insert(const BlockInsertion& insertion)
{
m_insertions.append(insertion);
}
void BlockInsertionSet::insert(size_t index, Ref<BasicBlock>&& block)
{
insert(BlockInsertion(index, WTFMove(block)));
}
BasicBlock* BlockInsertionSet::insert(size_t index, float executionCount)
{
Ref<BasicBlock> block = adoptRef(*new BasicBlock(BytecodeIndex(), m_graph.block(0)->variablesAtHead.numberOfArguments(), m_graph.block(0)->variablesAtHead.numberOfLocals(), m_graph.block(0)->variablesAtHead.numberOfTmps(), executionCount));
block->isReachable = true;
auto* result = block.ptr();
insert(index, WTFMove(block));
return result;
}
BasicBlock* BlockInsertionSet::insertBefore(BasicBlock* before, float executionCount)
{
return insert(before->index, executionCount);
}
bool BlockInsertionSet::execute()
{
if (m_insertions.isEmpty())
return false;
// We allow insertions to be given to us in any order. So, we need to sort them before
// running WTF::executeInsertions. Also, we don't really care if the sort is stable since
// basic block order doesn't have semantics - it's just to make code easier to read.
std::sort(m_insertions.begin(), m_insertions.end());
executeInsertions(m_graph.m_blocks, m_insertions);
// Prune out empty entries. This isn't strictly necessary but it's
// healthy to keep the block list from growing.
unsigned targetIndex = 0;
for (unsigned sourceIndex = 0; sourceIndex < m_graph.m_blocks.size();) {
RefPtr<BasicBlock> block = m_graph.m_blocks[sourceIndex++];
if (!block)
continue;
m_graph.m_blocks[targetIndex++] = block;
}
m_graph.m_blocks.shrink(targetIndex);
// Make sure that the blocks know their new indices.
for (unsigned i = 0; i < m_graph.m_blocks.size(); ++i)
m_graph.m_blocks[i]->index = i;
// And finally, invalidate all analyses that rely on the CFG.
m_graph.invalidateCFG();
m_graph.dethread();
return true;
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)