Rui Ueyama 961f43fb70 Make File always take the ownership of a MemoryBuffer. ...

The documentation of parseFile() said that "the resulting File
object may take ownership of the MemoryBuffer." So, whether or not
the ownership of a MemoryBuffer would be taken was not clear.
A FileNode (a subclass of InputElement, which is being deprecated)
keeps the ownership if a File doesn't take it.

This patch makes File always take the ownership of a buffer.
Buffers lifespan is not always the same as File instances.
Files are able to deallocate buffers after parsing the contents.

llvm-svn: 224113

2014-12-12 10:27:33 +00:00

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