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This change correctly sets the attributes on the callsites generated in thunks. This makes sure things such as sret, sext, etc. are correctly set, so that the call can be a proper tailcall. Also, the transfer of attributes in the replaceDirectCallers function appears to be unnecessary, but until this is confirmed it will remain. Author: jrkoenig Reviewers: dschuff, jfb Subscribers: llvm-commits, nlewycky Differential revision: http://reviews.llvm.org/D12581 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247313 91177308-0d34-0410-b5e6-96231b3b80d8
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