[cfe-commits] [PATCH] convert the Metadata API to use ArrayRef<>

[Jay Foad]

Related to http://llvm.org/bugs/show_bug.cgi?id=9214

This patch converts the Metadata API (principally MDNode::get*()) to
use ArrayRef<>.

I've converted the llvm and clang trees (tested with "make check") and
also dragonegg (only tested by building it). Other clients will also
need updating. (Clients that just use DIBuilder to created debug info
metadata won't need any changes.)

OK to commit?

Thanks,
Jay.
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