[PATCH] D96320: [ThinLTO, Sanitizers] Skip instrumentation by testing backend

[Vitaly Buka via Phabricator via cfe-commits]

vitalybuka added a comment.

In D96320#2554493 <https://reviews.llvm.org/D96320#2554493>, @aeubanks wrote:

> This seems like the wrong fix to me.
> ThinLTO only runs the simplification pipeline pre-link, then runs it again plus the optimization pipeline. The optimization pipeline is the only place that OptimizerLastEPCallback should run (aside from the -O0 pipeline). Basically, the OptimizerLastEPCallbacks should only ever run once throughout all of compilation for a given module.
>
> So it seems like LTO should do the same and only run the simplification pipeline pre-link, rather than just forward to `buildPerModuleDefaultPipeline()`, which runs both.

Alternative approach: register sanitizers on the backend only D96456 <https://reviews.llvm.org/D96456>


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https://reviews.llvm.org/D96320