SNodeArray &StmtList::removeUnusedAssignments() {
DISABLEDEBUGSTRING(*this);
bool stable;
do {
stable = true;
const size_t childCount = size(), stmtCount = childCount-1;
for(size_t i = 0; i < stmtCount; i++) {
SNode assign = (*this)[i];
SNode expr = assign.right();
if(expr.isName()) {
getTree().unmarkAll();
assign.left().mark();
getTree().traverseTree(NameSubstituter(assign.left().getName(), expr.getName()));
getTree().unmarkAll();
remove(i);
stable = false;
break;
}
}
} while(!stable);
for(int i = (int)size()-1; i--;) { // Remove unused assignments
const SNode &stmt = (*this)[i];
const String &varName = stmt.left().getName();
bool isUsed = false;
for(size_t j = i+1; j < size(); j++) {
if((*this)[j].dependsOn(varName)) {
isUsed = true;
break;
}
}
if(!isUsed) {
remove(i);
}
}
ENABLEDEBUGSTRING(*this);
return *this;
}
