nir: refactor divergence analysis (!4062) · Merge requests · Mesa / mesa · GitLab

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Equinix is shutting down its operations with us on April 30, 2025. They have graciously supported us for almost 5 years, but all good things come to an end.

Given the time frame, it's going to be hard to make a smooth transition of the cluster to somewhere else (TBD). Please expect in the next months some hiccups in the service and probably at least a full week of downtime to transfer gitlab to a different place.

All help is appreciated.

Daniel Schürmann requested to merge daniel-schuermann/mesa:nir_divergence_analysis into master Mar 05, 2020

This series refactors the divergence analysis in order to

make 'divergence' a property of ssa_def (by @jekstrand)
speed up the calculation w.r.t. phis

The speedup has no great impact, but bothered me since a while. Two things are done for this purpose:

handle phis when the corresponding cf_nodes are visited to short-cut loops
maintain a loop state to keep track of divergent break and continue statements