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Commit 1972e222 authored by Justin Lebar's avatar Justin Lebar
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[SelectionDAG] Use a union of bitfield structs for SDNode::SubclassData. 

Summary:
This greatly simplifies our handling of SDNode::SubclassData.

NFC, hopefully.  :)

See discussion in D23035 for discussion about the design API of these
bitfields.

Reviewers: chandlerc

Subscribers: llvm-commits, rnk

Differential Revision: https://reviews.llvm.org/D23036

llvm-svn: 279537
parent 0a33a7ae
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