[SelectionDAG] Fix for PR30775: Assertion `NodeToMatch->getOpcode() !=
ISD::DELETED_NODE && "NodeToMatch was removed partway through
selection"' failed.

NodeToMatch can be modified during matching, but code does not handle
this situation.

Differential Revision: https://reviews.llvm.org/D29292

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294003 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed