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Commit 136ea3f9 authored by Duncan P. N. Exon Smith's avatar Duncan P. N. Exon Smith
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IR: Add MDNode::isDistinct() 

Add API to indicate whether an `MDNode` is distinct.  A distinct node is
not stored in the MDNode uniquing tables, and will never be returned by
`MDNode::get()`.

Although distinct nodes are only currently created by uniquing
collisions (when operands change), PR22111 will allow these nodes to be
explicitly created.

llvm-svn: 225401
parent 9d01a5b5
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