BasicBlockLocation.cpp [plain text]
#include "config.h"
#include "BasicBlockLocation.h"
#include "CCallHelpers.h"
#include <climits>
#include <wtf/DataLog.h>
namespace JSC {
BasicBlockLocation::BasicBlockLocation(int startOffset, int endOffset)
: m_startOffset(startOffset)
, m_endOffset(endOffset)
, m_hasExecuted(false)
{
}
void BasicBlockLocation::insertGap(int startOffset, int endOffset)
{
std::pair<int, int> gap(startOffset, endOffset);
if (!m_gaps.contains(gap))
m_gaps.append(gap);
}
Vector<std::pair<int, int>> BasicBlockLocation::getExecutedRanges() const
{
Vector<Gap> result;
Vector<Gap> gaps = m_gaps;
int nextRangeStart = m_startOffset;
while (gaps.size()) {
Gap minGap(INT_MAX, 0);
unsigned minIdx = std::numeric_limits<unsigned>::max();
for (unsigned idx = 0; idx < gaps.size(); idx++) {
if (gaps[idx].first < minGap.first) {
minGap = gaps[idx];
minIdx = idx;
}
}
result.append(Gap(nextRangeStart, minGap.first - 1));
nextRangeStart = minGap.second + 1;
gaps.remove(minIdx);
}
result.append(Gap(nextRangeStart, m_endOffset));
return result;
}
void BasicBlockLocation::dumpData() const
{
Vector<Gap> executedRanges = getExecutedRanges();
for (Gap gap : executedRanges)
dataLogF("\tBasicBlock: [%d, %d] hasExecuted: %s\n", gap.first, gap.second, hasExecuted() ? "true" : "false");
}
#if ENABLE(JIT)
void BasicBlockLocation::emitExecuteCode(CCallHelpers& jit, MacroAssembler::RegisterID ptrReg) const
{
jit.move(CCallHelpers::TrustedImmPtr(&m_hasExecuted), ptrReg);
jit.store8(CCallHelpers::TrustedImm32(true), CCallHelpers::Address(ptrReg, 0));
}
#endif // ENABLE(JIT)
}