[6.0] [DebugInfo] [SelectionDAG] Fix handling of duplicate dbg values #8485
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…#86598) Before this fix, a duplicate llvm.dbg.value intrinsic referring to an argument, after an alloca, would be generated with `$noreg`, losing debug information. Instead, we silently drop the second debug info, so it doesn't break the first one. rdar://125375717 (cherry picked from commit 0e5c504)
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Before this fix, a duplicate llvm.dbg.value intrinsic referring to an argument, after an alloca, would be generated with
$noreg, losing debug information. Instead, we silently drop the second debug info, so it doesn't break the first one.rdar://125375717
Cherry picked from commit 0e5c504
Original PR llvm#86598