Danila Malyutin ba1349fc31 [SCEV] Fix "quick and dirty" difference that could lead to assert (#70688) ...

The old algorithm would remove all operands matching %step SCEV when it
intended to only remove a single one. This lead to assert when
SCEVAddExpr was of the form %step + %step and potential miscompiles in
similar cases. Such SCEVs could be created when construction reached
depth thresholds.

Fixes #70348

2023-10-31 00:50:57 +03:00

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