bool OwnershipChecker::checkValue(SILValue value) {
regularUsers.clear();
lifetimeEndingUsers.clear();
liveBlocks.clear();
// Since we do not have SILUndef, we now know that getFunction() should return
// a real function. Assert in case this assumption is no longer true.
SILFunction *f = value->getFunction();
assert(f && "Instructions and arguments should have a function");
// If the given function has unqualified ownership, there is nothing further
// to verify.
if (!f->hasQualifiedOwnership())
return false;
ErrorBehaviorKind errorBehavior(ErrorBehaviorKind::ReturnFalse);
SILValueOwnershipChecker checker(mod, deadEndBlocks, value, errorBehavior,
liveBlocks);
if (!checker.check()) {
return false;
}
// TODO: Make this more efficient.
copy(checker.getRegularUsers(), std::back_inserter(regularUsers));
copy(checker.getLifetimeEndingUsers(),
std::back_inserter(lifetimeEndingUsers));
return true;
}
bool SILValueOwnershipChecker::isSubobjectProjectionWithLifetimeEndingUses(
SILValue value,
const llvm::SmallVectorImpl<BranchPropagatedUser> &lifetimeEndingUsers)
const {
return handleError([&] {
llvm::errs() << " Function: '" << value->getFunction()->getName()
<< "'\n"
<< " Subobject projection with life ending uses!\n"
<< " Value: " << *value;
for (const auto &user : lifetimeEndingUsers) {
llvm::errs() << " Lifetime Ending User: " << *user;
}
llvm::errs() << '\n';
});
}