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Commit df55d8ba authored by Duncan P. N. Exon Smith's avatar Duncan P. N. Exon Smith
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Linker: Don't use MDNode::replaceOperandWith() 

`MDNode::replaceOperandWith()` changes all instances of metadata.  Stop
using it when linking module flags, since (due to uniquing) the flag
values could be used by other metadata.

Instead, use new API `NamedMDNode::setOperand()` to update the reference
directly.

llvm-svn: 225397
parent 37c93a93
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