Vedant Kumar 638b75bca2 [IR] Move optional data in llvm::Function into a hungoff uselist
Make personality functions, prefix data, and prologue data hungoff
operands of Function.

This is based on the email thread "[RFC] Clean up the way we store
optional Function data" on llvm-dev.

Thanks to sanjoyd, majnemer, rnk, loladiro, and dexonsmith for feedback!

Differential Revision: http://reviews.llvm.org/D13829

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256090 91177308-0d34-0410-b5e6-96231b3b80d8
2015-12-19 07:08:56 +00:00
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