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Summary: Make CallingConv::ID a plain unsigned instead of enum with a fixed set of valus. LLVM IR allows arbitraty calling conventions (you are free to write cc12345), and loading them as enum is an undefined behavior. This was reported by UBSan. Test Plan: llvm regression test suite Reviewers: nicholas Reviewed By: nicholas Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D5248 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217529 91177308-0d34-0410-b5e6-96231b3b80d8
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