Symbolic tags for simplifier phases
Every simplifier phase can have an arbitrary number of tags and multiple phases can share the same tags. The tags can be used as arguments to -ddump-simpl-phases to specify which phases are to be dumped. For instance, -ddump-simpl-phases=main will dump the output of phases 2, 1 and 0 of the initial simplifier run (they all share the "main" tag) while -ddump-simpl-phases=main:0 will dump only the output of phase 0 of that run. At the moment, the supported tags are: main The main, staged simplifier run (before strictness) post-worker-wrapper After the w/w split post-liberate-case After LiberateCase final Final clean-up run The names are somewhat arbitrary and will change in the future.
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