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Changes from Git (git http://labmaster3.local/git/llvm-project.git)

Summary

  1. [AIX] ExternalSymbolSDNode lowering (details)
Commit 25a8aec7f37b970849ccf5f2893431e2ca858709 by Xiangling.Liao
[AIX] ExternalSymbolSDNode lowering
For memcpy/memset/memmove etc., replace ExternalSymbolSDNode with a
MCSymbolSDNode, which have a prefix dot before function name as entry
point symbol.
Differential Revision: https://reviews.llvm.org/D70718
The file was modifiedllvm/lib/Target/PowerPC/PPCISelLowering.cpp
The file was addedllvm/test/CodeGen/PowerPC/aix-user-defined-memcpy.ll
The file was addedllvm/test/CodeGen/PowerPC/aix-external-sym-sdnode-lowering.ll