/// removeDeadUsersOfConstant - If the specified constantexpr is dead, remove
/// it. This involves recursively eliminating any dead users of the
/// constantexpr.
-static bool removeDeadUsersOfConstant(Constant *C) {
+static bool removeDeadUsersOfConstant(const Constant *C) {
if (isa<GlobalValue>(C)) return false; // Cannot remove this
while (!C->use_empty()) {
- Constant *User = dyn_cast<Constant>(C->use_back());
+ const Constant *User = dyn_cast<Constant>(C->use_back());
if (!User) return false; // Non-constant usage;
if (!removeDeadUsersOfConstant(User))
return false; // Constant wasn't dead
}
- C->destroyConstant();
+ const_cast<Constant*>(C)->destroyConstant();
return true;
}
/// off of this global value, remove them. This method is useful for clients
/// that want to check to see if a global is unused, but don't want to deal
/// with potentially dead constants hanging off of the globals.
-void GlobalValue::removeDeadConstantUsers() {
- Value::use_iterator I = use_begin(), E = use_end();
- Value::use_iterator LastNonDeadUser = E;
+void GlobalValue::removeDeadConstantUsers() const {
+ Value::use_const_iterator I = use_begin(), E = use_end();
+ Value::use_const_iterator LastNonDeadUser = E;
while (I != E) {
- if (Constant *User = dyn_cast<Constant>(*I)) {
+ if (const Constant *User = dyn_cast<Constant>(*I)) {
if (!removeDeadUsersOfConstant(User)) {
// If the constant wasn't dead, remember that this was the last live use
// and move on to the next constant.