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Summary: Use use_nodbg_empty() rather than use_empty() in MachineRegisterInfo::EmitLiveInCopies() when determining if a livein register has any uses or not. Otherwise a single dbg.value can make us generate different code, meaning -g would affect code generation. Found when compiling code for my out-of-tree target. Unfortunately I haven't been able to reproduce the problem on X86 or any of the other in-tree targets that I tried, so no test case. Reviewers: MatzeB Reviewed By: MatzeB Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D39044 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318382 91177308-0d34-0410-b5e6-96231b3b80d8
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