tree 8ea7e2263b0d43449fcede9b5f4400c45425a92d
parent 75980a4cd5dd5bee96ba6926218fc8fa121ca877
author Clement Courbet <courbet@google.com> 1550753976 +0000
committer Clement Courbet <courbet@google.com> 1550753976 +0000

Re-land part of r354244 "[DAGCombiner] Eliminate dead stores to stack."

This part introduces the lifetime node.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354578 91177308-0d34-0410-b5e6-96231b3b80d8