Chris Jackson 116dc70cf3 [DebugInfo][LSR] Add more stringent checks on IV selection and salvage ...

attempts

Prevent the selection of IVs that have a SCEV containing an undef. Also
prevent salvaging attempts for values for which a SCEV could not be
created by ScalarEvolution and have only SCEVUknown.

Reviewed by: Orlando

Differential Revision: https://reviews.llvm.org/D111810

2021-11-09 13:09:37 +00:00

238 KiB

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