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...ectively. > > To sum up, I really like the proposal overall, except I think it would be a **major** improvement to use DAGs for expressing the MIR, and sure, there's the odd detail here and there like about GIMacro. > > Cheers, > Nicolai Thanks for all your comments! >> _Grouping and Ordering Rules_ >> Combine rules are ordered and grouped using definitions of the form: >> def trivial_combines : GICombineGroup<[copy_prop]>; >> def combines_for_extload: GICombineGroup<[extending_loads]>; >> def all_combines : GICombineGroup<...

Hi All, I've been working on the GlobalISel combiner recently and I'd like to share the plan for how Combine Rules will be defined in GlobalISel and solicit feedback on it. This email ended up rather long so: TL;DR: We're planning to define GlobalISel Combine Rules using MIR syntax with a few bits glued on to interface with the algorithm and escape into C++ when we need to.

...y like the proposal overall, except I think it would be a **major** improvement to use DAGs for expressing the MIR, and sure, there's the odd detail here and there like about GIMacro. >>> >>> Cheers, >>> Nicolai >> Thanks for all your comments! >>>> _Grouping and Ordering Rules_ >>>> Combine rules are ordered and grouped using definitions of the form: >>>> def trivial_combines : GICombineGroup<[copy_prop]>; >>>> def combines_for_extload: GICombineGroup<[extending_loads]>; >>>> def a...