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Add comments. Early return. 

llvm-svn: 192149
This commit is contained in:
Rui Ueyama 2013-10-08 00:43:53 +00:00
parent f8c54842d6
commit 094546836b
1 changed files with 16 additions and 10 deletions
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26
lld/lib/Core/LinkingContext.cpp
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@ -81,24 +81,30 @@ void LinkingContext::setResolverState(int32_t state) const {
}
ErrorOr<File &> LinkingContext::nextFile() const {
// When nextFile() is called for the first time, _currentInputElement is not
// initialized. Initialize it with the first element of the input graph.
if (_currentInputElement == nullptr) {
ErrorOr<InputElement *> elem = inputGraph().getNextInputElement();
if (error_code(elem) == input_graph_error::no_more_elements)
return make_error_code(input_graph_error::no_more_files);
_currentInputElement = *elem;
}
do {
// Otherwise, try to get the next file of _currentInputElement. If the current
// input element points to an archive file, and there's a file left in the
// archive, it will succeed. If not, try to get the next file in the input
// graph.
for (;;) {
ErrorOr<File &> nextFile = _currentInputElement->getNextFile();
if (error_code(nextFile) == input_graph_error::no_more_files) {
ErrorOr<InputElement *> elem = inputGraph().getNextInputElement();
if (error_code(elem) == input_graph_error::no_more_elements)
return make_error_code(input_graph_error::no_more_files);
_currentInputElement = *elem;
} else {
if (error_code(nextFile) != input_graph_error::no_more_files)
return std::move(nextFile);
}
} while (_currentInputElement != nullptr);
return make_error_code(input_graph_error::no_more_files);
ErrorOr<InputElement *> elem = inputGraph().getNextInputElement();
if (error_code(elem) == input_graph_error::no_more_elements ||
*elem == nullptr)
return make_error_code(input_graph_error::no_more_files);
_currentInputElement = *elem;
}
}
void LinkingContext::addPasses(PassManager &pm) const {}