//------------------------------add_liveout------------------------------------
// Add a live-out value to a given blocks live-out set. If it is new, then
// also add it to the delta set and stick the block on the worklist.
void PhaseLive::add_liveout( Block *p, uint r, VectorSet &first_pass ) {
IndexSet *live = &_live[p->_pre_order-1];
if( live->insert(r) ) { // If actually inserted...
// We extended the live-out set. See if the value is generated locally.
// If it is not, then we must extend the live-in set.
if( !_defs[p->_pre_order-1].member( r ) ) {
if( !_deltas[p->_pre_order-1] && // Not on worklist?
first_pass.test(p->_pre_order) )
_worklist->push(p); // Actually go on worklist if already 1st pass
getset(p)->insert(r);
}
}
}
//------------------------------add_liveout------------------------------------
// Add a vector of live-out values to a given blocks live-out set.
void PhaseLive::add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass ) {
IndexSet *live = &_live[p->_pre_order-1];
IndexSet *defs = &_defs[p->_pre_order-1];
IndexSet *on_worklist = _deltas[p->_pre_order-1];
IndexSet *delta = on_worklist ? on_worklist : getfreeset();
IndexSetIterator elements(lo);
uint r;
while ((r = elements.next()) != 0) {
if( live->insert(r) && // If actually inserted...
!defs->member( r ) ) // and not defined locally
delta->insert(r); // Then add to live-in set
}
if( delta->count() ) { // If actually added things
_deltas[p->_pre_order-1] = delta; // Flag as on worklist now
if( !on_worklist && // Not on worklist?
first_pass.test(p->_pre_order) )
_worklist->push(p); // Actually go on worklist if already 1st pass
} else { // Nothing there; just free it
delta->set_next(_free_IndexSet);
_free_IndexSet = delta; // Drop onto free list
}
}
// The given argument escapes the callee, but does not become globally
// reachable.
bool is_arg_stack(int i) const {
return !_conservative && _arg_stack.test(i);
}
// The given argument does not escape globally, and may be returned.
bool is_arg_returned(int i) const {
return !_conservative && _arg_returned.test(i); }
// The given argument does not escape the callee.
bool is_arg_local(int i) const {
return !_conservative && _arg_local.test(i);
}