[PATCH] D102909: [NPM] Ability to add a pass before a previously registered one

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks added a comment.

In D102909#2808270 <https://reviews.llvm.org/D102909#2808270>, @pratlucas wrote:

> The concrete use case I have is based on two separate plugin passes - one of them is responsible for inserting a few inline assembly instructions into functions according to a specific criteria and the second one's job is to make some adjustments to all the inline asm instructions in the module. The former needs to run before the latter to ensure all inline asm instructions are in place before the adjustments take place.
> Both of those plugin passes are required to run on the last step of the optimizer pipeline, using the `registerOptimizerLastEPCallback` extension point, so there's not enough granularity available to ensure those are run in this specific order.

I'm still not understanding exactly what the criteria you're looking for is. Could you give a specific example of how your example could go wrong using `registerOptimizerLastEPCallback`? Even if they are to be registered separately via multiple calls to `registerOptimizerLastEPCallback`, the first `registerOptimizerLastEPCallback` should happen first.


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https://reviews.llvm.org/D102909