KMfilterCenters KMlocal::execute() // execute the algorithm
{
reset(); // resets everything
while(!isDone()) { // while not done
beginRun(); // start a new run
do { // do while run is not done
beginStage(); // start of stage processing
KMalg method = selectMethod(); // select a method
switch(method) { // apply one stage
case LLOYD: // Lloyd's algorithm
curr.lloyd1Stage();
break;
case SWAP: // swap heuristic
curr.swap1Stage();
break;
case RANDOM: // get random centers
curr.genRandom();
break;
default: // shouldn't come here
assert(false);
break;
}
endStage(); // end of stage processing
} while(!isRunDone()); // while run is not done
endRun(); // end of run processing
tryAcceptance(); // accept if appropriate
}
return best; // return best solution
}
RegionDescPtr selectRegion(const RegionContext& context,
TransKind kind) {
auto const mode = regionMode();
FTRACE(1,
"Select region: mode={} context:\n{}",
static_cast<int>(mode), show(context)
);
auto region = [&]{
try {
switch (mode) {
case RegionMode::None:
return RegionDescPtr{nullptr};
case RegionMode::Method:
return selectMethod(context);
case RegionMode::Tracelet:
return selectTracelet(context, kind == TransKind::Profile);
}
not_reached();
} catch (const std::exception& e) {
FTRACE(1, "region selector threw: {}\n", e.what());
return RegionDescPtr{nullptr};
}
}();
if (region) {
FTRACE(3, "{}", show(*region));
always_assert(region->instrSize() <= RuntimeOption::EvalJitMaxRegionInstrs);
} else {
FTRACE(1, "no region selectable; using tracelet compiler\n");
}
return region;
}
RegionDescPtr selectRegion(const RegionContext& context,
const Transl::Tracelet* t) {
auto const mode = regionMode();
FTRACE(1,
"Select region: mode={} context:\n{}",
static_cast<int>(mode), show(context)
);
auto region = [&] {
try {
switch (mode) {
case RegionMode::None:
return RegionDescPtr{nullptr};
case RegionMode::OneBC:
return selectOneBC(context);
case RegionMode::Method:
return selectMethod(context);
case RegionMode::Tracelet:
return selectTracelet(context, 0);
case RegionMode::Legacy:
always_assert(t);
return selectTraceletLegacy(*t);
case RegionMode::HotBlock:
case RegionMode::HotTrace:
always_assert(0 &&
"unsupported region mode");
}
not_reached();
} catch (const std::exception& e) {
FTRACE(1, "region selector threw: {}\n", e.what());
return RegionDescPtr{nullptr};
}
}();
if (region) {
FTRACE(3, "{}", show(*region));
} else {
FTRACE(1, "no region selectable; using tracelet compiler\n");
}
return region;
}
