[CIR][ThroughMLIR] Lower simple SwitchOp. #1871
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terapines-osc-cir
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| /// Create a pass for transforming CIR operations to more 'scf' dialect-friendly | ||
| /// forms. It rewrites operations that aren't supported by 'scf', such as breaks | ||
| /// and continues. | ||
| std::unique_ptr<mlir::Pass> createMLIRLoweringPreparePass(); |
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I'm a bit skeptical of having an MLIRLoweringPrepare pass that is separate from the existing LoweringPrepare pass. For one thing, "lowering through MLIR" is a very vague concept. The fact that you're mentioning scf as the target dialect here is good. I'd like to consider what's in LoweringPrepare to see if things can be reorganized in a more general way so anyone lowering to arbitrary dialects will be able to reason about what passes they need to run to prepare.
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I agree.
I'd expect lowering to SCF to be selected at LoweringPreparePass::runOnOperation() based using -fno-direct-lowering. You could still keep the implementation on a distinct file, but following Andy's suggestion of location
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| namespace cir { | ||
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| struct MLIRLoweringPrepare |
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This should probably be in the lib/CIR/Dialects/Transforms directory. That, of course, relates to my comment above about the focus of this pass.
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Thanks for the suggestion, file is moved to lib/CIR/Dialects/Transfrorms.
| /// Create a pass for transforming CIR operations to more 'scf' dialect-friendly | ||
| /// forms. It rewrites operations that aren't supported by 'scf', such as breaks | ||
| /// and continues. | ||
| std::unique_ptr<mlir::Pass> createMLIRLoweringPreparePass(); |
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I agree.
I'd expect lowering to SCF to be selected at LoweringPreparePass::runOnOperation() based using -fno-direct-lowering. You could still keep the implementation on a distinct file, but following Andy's suggestion of location
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Please let me know when this is ready for review again |
Sure, this is one of the PR I am currently working on. Thanks for your patience 🤝 |
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The PR 1742 contains too many conflicts with the main branch.
Got it re-patched to the current main branch.