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Commit d7c2f584 authored by Rui Ueyama's avatar Rui Ueyama
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COFF: Make the Driver own all MemoryBuffers. NFC. 

Previously, a MemoryBuffer of a file was owned by each InputFile object.
This patch makes the Driver own all of them. InputFiles now have only
MemoryBufferRefs. This change simplifies ownership managment
(particularly for ObjectFile -- the object owned a MemoryBuffer only when
it's not created from an archive file, because in that case a parent
archive file owned the entire buffer. Now it owns nothing unconditionally.)

llvm-svn: 238690
parent faa8bfdd
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