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6422696166
This patch fixes code that incorrectly handled dbg.values with duplicate location operands, i.e. !DIArgList(i32 %a, i32 %a). The errors in question were caused by either applying an update to dbg.value multiple times when the update is only valid once, or by updating the DIExpression for only the first instance of a value that appears multiple times. Differential Revision: https://reviews.llvm.org/D105831
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