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pystats: Uop "miss" counts are incorrect #117457

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@mdboom

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@mdboom

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Bug description:

After the trace stitching, all uop miss counts are attributed to either _DEOPT or _SIDE_EXIT. These should instead by counted for the uop immediately prior.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

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type-bugAn unexpected behavior, bug, or error

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