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93dd711033
Set debug location for terminator instruction in loop backedge block (which is an unconditional jump to loop header). We can't copy debug location from original backedges, as there can be several of them, with different debug info locations. So, we follow the approach of SplitBlockPredecessors, and copy the debug info from first non-PHI instruction in the header (i.e. destination block). This is yet another change for PR23837. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240999 91177308-0d34-0410-b5e6-96231b3b80d8
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