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2018 Aug 13
2
Assembly mimatch between windows and linux llvm.(probably caused by sort algorithm)
To whom it may concern,
I'm running some testcases(A and B) in Linux LLVM(built in Ubuntu16.04) and Windows LLVM(built by Visual Studio 2015), both of which were LLVM 4.0.0 and built with same source codes, but I got different assembly files(A_Linux != A_Windows, B_Linux = B_Windows). Privacy reasons prevent me from sharing my testcases here, sorry.
I compared debug information and found the root cause in MachinePipliner.cpp that Node orders differed after sort algorithm.
There were two `std::sort` in this file and when I replaced them with 'std::stable_sort...