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2020 Jun 09
5
Preventing function call from being optimized out in LTO
Hello,
I am adding function calls to an LLVM link-time optimization (LTO) pass,
using the IRBuilder::CreateCall method. I want these calls to remain in the
final x86 binary at any optimization level, but on levels -O2 and -O3, some
of these calls are being optimized out.
So far, I've tried adding each function in the program (excluding LLVM
intrinsics) to the llvm.used set, and I've also