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adhi
2019 Aug 23
2
Using [GlobalISel] to provide peephole optimizations
...n theory, a lot of pattern fragments could even be added
automatically, by comparing pattern fragments and the machine opcodes they
represent - giving a free automatically generated "foldImmediate", among
other things.
A diff of the proof-of-concept can be found here:
(https://paste.ee/p/aDHIg), note though it's really just a curiosity to get
some conversation going, that other Selectors will reject these patterns (I
haven't added their escape routes), and that you're likely to break it in
many different ways. And of course that they should exist as their own
table, and that...