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a562501cd0
Summary: While working with DagInit's, it's often the case that you expect the operator to be a reference to a def. This patch adds a wrapper for this common case to reduce the amount of boilerplate callers need to duplicate repeatedly. getOperatorAsDef() returns the record if the DagInit has an operator that is a DefInit. Otherwise, it prints a fatal error. There's only a few pre-existing examples in LLVM at the moment and I've left a few instances of the code this simplifies as they had more specific error messages than the generic one this produces. I'm going to be using this a fair bit in my subsequent patches. Reviewers: bogner, volkan, nhaehnle Reviewed By: nhaehnle Subscribers: nhaehnle, hiraditya, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, lenary, s.egerton, pzheng, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D68424 llvm-svn: 374101