commit 37c7ccc40c8540a9c23b1c57c444fd038d4e37cb
author Duncan P. N. Exon Smith <dexonsmith@apple.com> Mon Jan 19 22:24:52 2015 +0000
committer Duncan P. N. Exon Smith <dexonsmith@apple.com> Mon Jan 19 22:24:52 2015 +0000
tree e88277b51947c8ddcffcf041496e04a152c8064e
parent 65bb48b6fc500f42d4340d909ec22893d4c56741

IR: Allow temporary nodes to become uniqued or distinct

Add `MDNode::replaceWithUniqued()` and `MDNode::replaceWithDistinct()`,
which mutate temporary nodes to become uniqued or distinct.  On uniquing
collisions, the unique version is returned and the node is deleted.

This takes advantage of temporary nodes being folded back in, and should
let me clean up some awkward logic in `MapMetadata()`.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226510 91177308-0d34-0410-b5e6-96231b3b80d8